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Mating, courtship, and territorial behaviors of Polychrus acutirostris (Squamata: Polychrotidae) in a Caatinga area of Northeastern Brazil

Supplemental material, sj-pdf-1-lup-10.1177_09612033211030549 for Carriage prevalence, serotype distribution, and antimicrobial susceptibility among pneumococcal isolates recovered from adults with systemic lupus erythematosus by Rodrigo Poubel Vieira de Rezende, Nayara Torres Cardoso-Marques, Larissa Alexandra Silva Rodrigues, Jo��o Paulo Chevrand Latini de Almeida, Gecilmara Salviato Pillegi, L��cia Martins Teixeira, Evandro Mendes Klumb and Felipe Piedade Gon��alves Neves in Lupus

Submitted by SBI Biblioteca Digital (sbi.bibliotecadigital@puc-campinas.edu.br) on 2020-10-16T20:21:55Z No. of bitstreams: 1 JO?O JAIME DE CARVALHO ALMEIDA FILHO.pdf: 11420315 bytes, checksum: 1c3ebf6a005cf6ab3702d3b26cdc0f07 (MD5) Made available in DSpace on 2020-10-16T20:21:55Z (GMT). No. of bitstreams: 1 JO?O JAIME DE CARVALHO ALMEIDA FILHO.pdf: 11420315 bytes, checksum: 1c3ebf6a005cf6ab3702d3b26cdc0f07 (MD5) Previous issue date: 2020-02-05 Coordena??o de Aperfei?oamento Pessoal de N?vel Superior - CAPES Due to the launch of Pro?lcool, between the years of 1975 and 2010, the state of S?o Paulo saw the emergence and consolidation of a new predominant economic activity in agribusiness. It concerns the sugar-energy sector, which uses almost half of the arable land in the regions of the state for sugarcane planting and has installed processing plants in just over a third of the municipalities in those regions. This phenomenon supposedly generates relevant economic growth, however it raises important questions: what impact does the installation of the plants bring to the municipalities? Is it a driving force for economic growth? Is it a generator factor for greater social equity? Does it create or accentuate socioeconomic inequalities? Are there federal and state government policies through compensatory investments to minimize this trend? The present study analyzes economic, demographic and social indicators, comparing the municipalities contemplated with the presence of plants to the ones without them, seeking to verify the influence of the plants at the municipal or regional level as well as spatializing the results in a series of maps. We conclude that, the presence of the plants has a positive influence, with a slight but constant improvement of several social indicators, at the municipal level. Such influence was not detected at the regional level. O estado de S?o Paulo viu acontecer, desde 1975, com o lan?amento do Pro?lcool, at? 2010, o surgimento e consolida??o de uma nova atividade econ?mica predominante no agroneg?cio. Trata-se do setor sucroenerg?tico, que utiliza para o plantio de cana-de-a??car quase metade das terras agricultur?veis das regi?es do estado em que est? presente e instalou usinas de processamento em pouco mais de um ter?o dos munic?pios das mesmas regi?es. Esse fen?meno supostamente gera crescimento econ?mico relevante, por?m surgem quest?es importantes a estudar: Que impacto a instala??o das usinas traz aos munic?pios? ? um fator gerador de crescimento econ?mico e de gera??o de demandas sociais? Gera maior equidade social? Cria ou acentua desigualdades socioecon?micas? Existem pol?ticas dos governos federal e estadual, por meio de investimentos compensat?rios a fim de minimizar essa tend?ncia? O presente estudo analisa indicadores econ?micos, demogr?ficos e sociais, comparando os munic?pios com ou sem a presen?a de usinas, procurando verificar a influ?ncia das usinas no ?mbito municipal ou regional e espacializando os resultados, em uma s?rie de mapas. Conclu?mos que a presen?a das usinas exerce influ?ncia positiva, com melhora discreta, por?m constante, em diversos indicadores sociais, no ?mbito municipal. Tal influ?ncia n?o foi detectada no ?mbito regional.

In this work, we introduce a computational model for the study of the host-bacteria interaction and the influence of the intestinal microbiota on the behavior and feeding pattern of an individual. The model is based on digital entities, which we've called Digital Beings (DBs), modeled using dynamic systems and genetic algorithms. We have successfully tested the use of the DBs by reproducing observation in previously made studies using rats and humans. Among these studies, we highlight those on how the bacteria in an individual's stomach could influence their eating behavior and how a controlled and continuous diet can affect the longevity of a certain population. Our results point that the Digital Beings can be used as a tool for supporting the devising of experiments and corroborating with theoretical hypotheses, reducing the number of in vivo tests., 13 pages, 8 figures

In this work we present a new bio-inspired method (using an adapted, frog based Particle Swarm Optimization) that can track a skyrmion's position. The structure and position of skyrmions in a given system is usually determined either by visual impression through a vector plot, or by averaging over magnetization and topological charge. Due to the inherent difficulty of acquiring this information in discrete systems, and also in systems with finite boundaries, we present a method which is able to reliably track a wide array of different topological structures, while also providing additional data about internal degrees of freedom, in both stationary and dynamic cases., 8 pages, 6 figures, contains code

The objective of this work was to evaluate the effect of the electrical conductivity of the nutrient solution on fruit quality in gherkin cultivars. A randomized complete block design was used in a 4 x 4 factorial design, with three replicates, four cultivars (Do Norte, 163, Liso de Calcutá e Liso Gibão) with four concentrations of nutrients in the nutrient solution with different electrical conductivities (1.4, 1.9, 2.4 and 2.9 dS/m). The fruits were harvested at commercial maturity, immature with intense green color and analyzed the following characteristics: soluble solids, pH, electrical conductivity of the juice (CEsuco), titratable acidity and SS/TA ratio. With the exception of pH, the other quality characteristics of the fruit were affected by the cultivation of the gherkin in the different nutrient solutions and of different form for each cultivar. The fruits of cultivar 163 showed lower SS, pH, CEsuco for CEsn of 1.4 dS/m and SS/AT ratio, but presented higher TA and CEsuco for CEsn above 1.4 dS/m). Considering the SS/TA ratio, the cultivars Do Norte and Liso Gibão presented, in general, better quality for in natura consumption. The fruits with better quality, higher SS/TA ratio, were obtained for all cultivars in nutrient solution with higher electrical conductivity., Este trabalho foi desenvolvido objetivando avaliar o efeito da condutividade elétrica da solução nutritiva sobre a qualidade dos frutos em cultivares de maxixeiro. Utilizou-se o delineamento de blocos casualizados, em esquema fatorial 4 x 4, com quatro repetições, sendo quatro cultivares de maxixe (Cucumis anguria)(‘Do Norte’, ‘163’, ‘Liso de Calcutᒠe ‘Liso Gibão’) fertirrigadas com soluções nutritivas apresentando diferentes condutividades elétricas (1,4; 1,9; 2,4 e 2,9 dS m-1). Os frutos foram analisados quanto as seguintes características: sólidos solúveis totais (SST), pH, condutividade elétrica do suco (CEsuco), acidez titulável (AT) e razão SST/AT. Com exceção do pH, as demais características de qualidade do fruto foram afetadas pelo cultivo do maxixeiro nas diferentes soluções nutritivas e de forma diferente para cada cultivar. Os frutos da cultivar ‘163’ apresentam menor SST, pH, CEsuco para a condutividade elétrica da solução nutritiva (Cesn) de 1,4 dS m-1e relação SST/AT, mas apresentou maior AT e CEsuco para CEsn acima de 1,4 dS m-1). Considerando a relação SST/AT, as cultivares ‘Do Norte’ e ‘Liso de Calcutᒠapresentaram, de forma geral, melhor qualidade para consumoin natura. Frutos com maior razão SST/AT, foram obtidas para todas as cultivares em solução nutritiva com maior condutividade elétrica.

Submitted by Francisco Neto (frc.neto@gmail.com) on 2018-11-12T18:35:20Z No. of bitstreams: 3 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Tese_FranciscoNeto_Versa??oFinal.pdf: 3580723 bytes, checksum: ab050a3f59a7cd9dc40bf2abd259448c (MD5) 33 ATA de Defesa - Francisco Neto (Digitalizada).pdf: 674001 bytes, checksum: 9e15e8338add9d9e1950b27fa1f138da (MD5) Approved for entry into archive by Secretaria PPGI (secretariappgi@icomp.ufam.edu.br) on 2018-11-12T19:14:20Z (GMT) No. of bitstreams: 3 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Tese_FranciscoNeto_Versa??oFinal.pdf: 3580723 bytes, checksum: ab050a3f59a7cd9dc40bf2abd259448c (MD5) 33 ATA de Defesa - Francisco Neto (Digitalizada).pdf: 674001 bytes, checksum: 9e15e8338add9d9e1950b27fa1f138da (MD5) Approved for entry into archive by Divis??o de Documenta????o/BC Biblioteca Central (ddbc@ufam.edu.br) on 2018-11-12T20:39:29Z (GMT) No. of bitstreams: 3 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Tese_FranciscoNeto_Versa??oFinal.pdf: 3580723 bytes, checksum: ab050a3f59a7cd9dc40bf2abd259448c (MD5) 33 ATA de Defesa - Francisco Neto (Digitalizada).pdf: 674001 bytes, checksum: 9e15e8338add9d9e1950b27fa1f138da (MD5) Made available in DSpace on 2018-11-12T20:39:29Z (GMT). No. of bitstreams: 3 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Tese_FranciscoNeto_Versa??oFinal.pdf: 3580723 bytes, checksum: ab050a3f59a7cd9dc40bf2abd259448c (MD5) 33 ATA de Defesa - Francisco Neto (Digitalizada).pdf: 674001 bytes, checksum: 9e15e8338add9d9e1950b27fa1f138da (MD5) Previous issue date: 2017-11-24 (61) 99607-5024 Internet flexible environments need a more formal process to provide intelligent services to their users. This process should define protocols, specification languages and schemes for generation and integration of such intelligent services. In the project reported here, we show the design and development of a framework that solves this problem in a generic way. The validation of this framework proposal involved an implementation of an instance of the formal elements described in this work. We have studied and classified how intelligent services are currently implemented in CSCW environments in the web and we proposed a differentiated interpretation for the types of tasks intelligent based on the point of view of its functionalities. This classification was later used in the creation of a reference model for a layer of intelligent services. From the reference model a reference architecture was assembled in which we describe its elements as well as a description of their behaviors and relationships. Finally, an implementation was produced for the proposed architecture. Ambientes flexi??veis na internet precisam de um meio de prover servic??os inteligentes a seus usua??rios, o que envolve a definic??a??o de protocolos, linguagens de especificac??a??o, esquemas para a gerac??a??o e integrac??a??o de tais servic??os. No projeto aqui descrito, mostramos a concepc??a??o e desenvolvimento de um framework que resolve esse problema de forma gene??rica. A validac??a??o da proposta envolveu a implementac??a??o das insta??ncias dos elementos formalizados. Identificamos como servic??os inteligentes sa??o implementados atualmente em ambientes colaborativos na web e propusemos uma classificac??a??o diferenciada para os tipos de tarefas inteligentes sob o ponto de vista de suas funcionalidades, o que foi posteriormente utilizado na criac??a??o de um modelo de refere??ncia para uma camada de servic??os inteligentes. A partir do modelo de refere??ncia foi construi??do uma arquitetura na qual descrevemos os principais componentes necessa??rios bem como fazemos uma descric??a??o de seus comporta- mentos e relacionamentos. Por fim, foi desenvolvido uma implementac??a??o para a arquitetura proposta.

Esta disserta??o, do curso de mestrado em Ci?ncias Criminais, ?rea de concentra??o Sistema Penal e Viol?ncia, linha de pesquisa Sistemas Jur?dico-Penais Contempor?neos, versa sobre banco de dados gen?ticos para fins de identifica??o criminal. Ele pode ser constitu?do de distintas formas, podendo ser uma importante ferramenta ? resolu??o de delitos. Originalmente, esse instrumento foi criado visando os crimes cometidos contra a dignidade sexual, sendo que, hoje, diretamente proporcional ao crescimento do n?mero de na??es que o utilizam houve tamb?m uma dilata??o dos tipos de crimes perseguidos. Contudo, ao mesmo tempo, a utiliza??o de dados gen?ticos, seja para fins criminais ou n?o, abrange a observ?ncia da prote??o da privacidade pela prote??o de inviolabilidade de segredo que esses dados trazem consigo cujos bancos de dados informatizados os colocam em estado de vulnerabilidade, dado as possibilidades de acesso desses registros. Os dados que comp?em o ADN n?o se limitam ao indiv?duo, incluem a sua hereditariedade. A partir de uma revis?o bibliogr?fica, legislativa e jurisprudencial, tanto p?tria como em direito comparado, o presente trabalho monogr?fico objetiva investiga as quest?es decorrentes da administra??o do banco e os aspectos jur?dicopenais envolvidos no acesso dos dados de perfis de ADN com fins criminais.

Submitted by Mateus Oliveira (oliveirafmateus@hotmail.com) on 2021-12-31T13:42:26Z No. of bitstreams: 4 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Disserta????o_Mateus Ferreira de Oliveira_PPGCEM.pdf: 4185647 bytes, checksum: 1ad630a8d9a8be7dd2ad1fbb17749a6b (MD5) 2. Carta Encaminhamento-DISSERTA????O__Mateus Oliveira (2021.2)-assinado.pdf: 116090 bytes, checksum: 5a69735eae08c2689a80a9c595ef9a9d (MD5) 3. ATA DE DEFESA DA DISSERTA????O_Mateus Ferreira de Oliveira-assinado.pdf: 300920 bytes, checksum: 7495e2abc183c346f5af4b4f7e6ff12a (MD5) Approved for entry into archive by PPGCEM Ci??ncia e Engenharia de Materiais (ppgcem@ufam.edu.br) on 2022-01-04T13:29:22Z (GMT) No. of bitstreams: 4 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Disserta????o_Mateus Ferreira de Oliveira_PPGCEM.pdf: 4185647 bytes, checksum: 1ad630a8d9a8be7dd2ad1fbb17749a6b (MD5) 2. Carta Encaminhamento-DISSERTA????O__Mateus Oliveira (2021.2)-assinado.pdf: 116090 bytes, checksum: 5a69735eae08c2689a80a9c595ef9a9d (MD5) 3. ATA DE DEFESA DA DISSERTA????O_Mateus Ferreira de Oliveira-assinado.pdf: 300920 bytes, checksum: 7495e2abc183c346f5af4b4f7e6ff12a (MD5) Approved for entry into archive by Divis??o de Documenta????o/BC Biblioteca Central (ddbc@ufam.edu.br) on 2022-01-04T18:36:53Z (GMT) No. of bitstreams: 4 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Disserta????o_Mateus Ferreira de Oliveira_PPGCEM.pdf: 4185647 bytes, checksum: 1ad630a8d9a8be7dd2ad1fbb17749a6b (MD5) 2. Carta Encaminhamento-DISSERTA????O__Mateus Oliveira (2021.2)-assinado.pdf: 116090 bytes, checksum: 5a69735eae08c2689a80a9c595ef9a9d (MD5) 3. ATA DE DEFESA DA DISSERTA????O_Mateus Ferreira de Oliveira-assinado.pdf: 300920 bytes, checksum: 7495e2abc183c346f5af4b4f7e6ff12a (MD5) Made available in DSpace on 2022-01-04T18:36:53Z (GMT). No. of bitstreams: 4 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Disserta????o_Mateus Ferreira de Oliveira_PPGCEM.pdf: 4185647 bytes, checksum: 1ad630a8d9a8be7dd2ad1fbb17749a6b (MD5) 2. Carta Encaminhamento-DISSERTA????O__Mateus Oliveira (2021.2)-assinado.pdf: 116090 bytes, checksum: 5a69735eae08c2689a80a9c595ef9a9d (MD5) 3. ATA DE DEFESA DA DISSERTA????O_Mateus Ferreira de Oliveira-assinado.pdf: 300920 bytes, checksum: 7495e2abc183c346f5af4b4f7e6ff12a (MD5) Previous issue date: 2021-11-30 FAPEAM - Funda????o de Amparo ?? Pesquisa do Estado do Amazonas The cement industry is responsible for a large part of greenhouse gas emissions, especially during clinker production. Studies carried out are unanimous in reporting that cement manufacturing is responsible for about 7% of the total CO2 emissions in the world. Based on this fact, there is the continuous expansion of civil construction, with the consumption of nonrenewable inputs, such as those used in concrete production. Due to these factors, the experimental program present in this work aimed to study the feasibility of producing pozzolanic ashes from the burning of green coconut shell biomass. The proposal of this research was due to the fact that Brazil is the fifth largest producer of coconut in the world and faces problems with the disposal of this agro-industrial residue, causing accumulation in landfills. In addition, there are also the environmental impacts caused by the manufacture of Portland cement. The experimental program began with the collection of coconut, followed by drying the raw material, grinding and chemical processing of the green coconut biomass for the production of chemically treated and untreated ash at 600 ??C, 700 ??C and 800 ??C. Ashes were characterized by laser particle size, X-ray fluorescence, X-ray diffraction, electrical conductivity, Chapelle pozzolanic activity index and BET surface area for the analysis of temperatures where the ash showed reactivity. The results showed that the ash without chemical treatment had undesirable alkali metals for their use as pozzolans. On the other hand, the ash produced after the chemical treatment of coconut exhibited a sum of SiO2, Fe2O3 and Al2O3 greater than 50%, in addition to a loss of ignition less than 6%, classifying them as pozzolanic according to NBR 12653 (ABNT, 2014), except by the SO3 content. By analyzing the pozzolanic activity index data measured by electrical conductivity and modified Chapelle, results were obtained up to 0.945 mS/cm and 1263.09 mg Ca(OH)2, respectively. Such values demonstrate that the material has pozzolanic activity, according to the classification by Lux??n et al. (1989) and Raverdy et al. (1980). Finally, the results of characterization of the leached ash found that there is the feasibility of green coconut husk ash as a mineral addition to the cementitious paste, since it has chemical composition, loss of ignition and Chapelle pozzolanic activity index that are interesting for the application of this as pozzolan A ind??stria do cimento ?? respons??vel por grande parte das emiss??es de gases do efeito estufa, especialmente durante a produ????o de cl??nquer. Estudos realizados s??o un??nimes ao relatar que a fabrica????o de cimento ?? respons??vel por cerca de 7% da emiss??o total de CO2 no mundo. Alicer??ado a este fato, tem-se a cont??nua expans??o da constru????o civil, com o consumo de insumos n??o renov??veis, como os utilizados na produ????o concreto. Por conta destes fatores, o programa experimental presente neste trabalho objetivou estudar a viabilidade da produ????o de cinza pozol??nica a partir da queima da biomassa da casca do coco verde. A proposi????o desta pesquisa deu-se pelo fato do Brasil ser o quinto maior produtor mundial de coco e enfrentar problemas de descarte desse res??duo agroindustrial, causando ac??mulo nos aterros, somado a isto, tem-se ainda os impactos ambientais provocados pela fabrica????o do cimento Portland. O programa experimental iniciou-se com a coleta do res??duo do coco verde, seguido da secagem da mat??ria-prima, moagem e beneficiamento qu??mico da biomassa do coco verde para a produ????o de cinzas tratadas e n??o tratadas quimicamente, a 600 ??C, 700 ??C e 800 ??C. As cinzas foram caracterizadas por granulometria a laser, fluoresc??ncia de raios-X, difra????o de raios-X, condutividade el??trica, ??ndice de atividade pozol??nica Chapelle e ??rea de superf??cie BET para an??lise das temperaturas onde as cinzas apresentassem reatividade. Os resultados mostraram que as cinzas sem tratamento qu??mico possu??am metais alcalinos indesej??veis para a utiliza????o destas como pozolanas. Por outro lado, as cinzas produzidas ap??s o tratamento qu??mico do coco exibiram somat??rio de SiO2, Fe2O3 e Al2O3 maiores que 50%, al??m de perda ao fogo menor que 6%, classificando-as como pozol??nicas conforme a NBR 12653 (ABNT, 2014), exceto pelo teor de SO3, o qual foi 2,5% maior. Ao analisar os dados de ??ndice de atividade pozol??nica mensurados pela condutividade el??trica e por Chapelle modificado, obtiveram-se resultados de at?? 0,945 mS/cm e 1263,09 mg Ca(OH)2, respectivamente. Tais valores demonstram que o material possui atividade pozol??nica, de acordo com a classifica????o de Lux??n et al. (1989) e Raverdy et al. (1980). Por fim, os resultados de caracteriza????o da cinza lixiviada revelaram que h?? a viabilidade da cinza da casca do coco verde como adi????o mineral ?? pasta ciment??cia, uma vez que ela possui composi????o qu??mica, perda ao fogo e ??ndice de atividade pozol??nica Chapelle interessantes ?? aplica????o desta como pozolana.

Submitted by Stefanny Di Samuel da Silva Costa (stefanny.costaa@gmail.com) on 2021-10-20T18:48:15Z No. of bitstreams: 5 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) 4. DISSERTA????O STEFANNY 04.10.21 VERSAO FINAL_assinado.pdf: 7242207 bytes, checksum: da6bd87ee731624217365fc4893c57f6 (MD5) 2. Carta Encaminhamento-DISSERTA????O__Stefanny Costa (2021.2)-assinado.pdf: 117382 bytes, checksum: 4c9b174e4b59777972a3f3678307c481 (MD5) 3. ATA DE DEFESA DA DISSERTA????O - Stefanny di Samuel da Silva-assinado.pdf: 288158 bytes, checksum: 9e4e93c65df9d0fab47778f5506e6b46 (MD5) 1. Ficha Catalogr??fica_Stefanny.pdf: 1914 bytes, checksum: 4cb82f23af97ec269f7c75aafd892e5d (MD5) Approved for entry into archive by PPGCEM Ci??ncia e Engenharia de Materiais (ppgcem@ufam.edu.br) on 2021-10-21T12:36:36Z (GMT) No. of bitstreams: 5 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) 4. DISSERTA????O STEFANNY 04.10.21 VERSAO FINAL_assinado.pdf: 7242207 bytes, checksum: da6bd87ee731624217365fc4893c57f6 (MD5) 2. Carta Encaminhamento-DISSERTA????O__Stefanny Costa (2021.2)-assinado.pdf: 117382 bytes, checksum: 4c9b174e4b59777972a3f3678307c481 (MD5) 3. ATA DE DEFESA DA DISSERTA????O - Stefanny di Samuel da Silva-assinado.pdf: 288158 bytes, checksum: 9e4e93c65df9d0fab47778f5506e6b46 (MD5) 1. Ficha Catalogr??fica_Stefanny.pdf: 1914 bytes, checksum: 4cb82f23af97ec269f7c75aafd892e5d (MD5) Rejected by Divis??o de Documenta????o/BC Biblioteca Central (ddbc@ufam.edu.br), reason: A ficha catalogr??fica precisa de ajustes: 1) No campo sobrenome do autor inserir apenas "Costa". Assim, na ficha ser?? apresentado "Costa, Stefanny Di Samuel da Silva"; 2) No t??tulo iniciar em letra mai??scula apenas a primeira palavra do t??tulo, palavras com nomes pr??prios e siglas. 3) Informa????es institucionais (Universidade e Mestrado) est??o duplicadas; 4) Nos campos de Palavras-chave, suprimir o n??mero 1 que est?? duplicado. ****Sugerimos a elabora????o de uma nova ficha, ap??s assistir ao tutorial dispon??vel em https://drive.google.com/file/d/1it-8jH28oaPIWwWxqzr8-guEV21q9t4G/view on 2021-10-21T14:12:14Z (GMT) Submitted by Stefanny Di Samuel da Silva Costa (stefanny.costaa@gmail.com) on 2021-10-22T02:12:58Z No. of bitstreams: 5 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) 4. DISSERTA????O STEFANNY 04.10.21 VERSAO FINAL_assinado.pdf: 7242207 bytes, checksum: da6bd87ee731624217365fc4893c57f6 (MD5) 2. Carta Encaminhamento-DISSERTA????O__Stefanny Costa (2021.2)-assinado.pdf: 117382 bytes, checksum: 4c9b174e4b59777972a3f3678307c481 (MD5) 3. ATA DE DEFESA DA DISSERTA????O - Stefanny di Samuel da Silva-assinado.pdf: 288158 bytes, checksum: 9e4e93c65df9d0fab47778f5506e6b46 (MD5) 1. Ficha Catalogr??fica_Stefanny.pdf: 10332 bytes, checksum: 88c57edda43db71bff9481e643d337f2 (MD5) Approved for entry into archive by PPGCEM Ci??ncia e Engenharia de Materiais (ppgcem@ufam.edu.br) on 2021-10-22T11:49:23Z (GMT) No. of bitstreams: 5 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) 4. DISSERTA????O STEFANNY 04.10.21 VERSAO FINAL_assinado.pdf: 7242207 bytes, checksum: da6bd87ee731624217365fc4893c57f6 (MD5) 2. Carta Encaminhamento-DISSERTA????O__Stefanny Costa (2021.2)-assinado.pdf: 117382 bytes, checksum: 4c9b174e4b59777972a3f3678307c481 (MD5) 3. ATA DE DEFESA DA DISSERTA????O - Stefanny di Samuel da Silva-assinado.pdf: 288158 bytes, checksum: 9e4e93c65df9d0fab47778f5506e6b46 (MD5) 1. Ficha Catalogr??fica_Stefanny.pdf: 10332 bytes, checksum: 88c57edda43db71bff9481e643d337f2 (MD5) Rejected by Divis??o de Documenta????o/BC Biblioteca Central (ddbc@ufam.edu.br), reason: Substituir a ficha incorreta que se encontra no arquivo da disserta????o, por aquela que consta ?? parte. on 2021-10-22T17:38:21Z (GMT) Submitted by Stefanny Di Samuel da Silva Costa (stefanny.costaa@gmail.com) on 2021-10-25T13:39:56Z No. of bitstreams: 5 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) 2. Carta Encaminhamento-DISSERTA????O__Stefanny Costa (2021.2)-assinado.pdf: 117382 bytes, checksum: 4c9b174e4b59777972a3f3678307c481 (MD5) 3. ATA DE DEFESA DA DISSERTA????O - Stefanny di Samuel da Silva-assinado.pdf: 288158 bytes, checksum: 9e4e93c65df9d0fab47778f5506e6b46 (MD5) 1. Ficha Catalogr??fica_Stefanny.pdf: 10332 bytes, checksum: 88c57edda43db71bff9481e643d337f2 (MD5) 4. DISSERTA????O STEFANNY 04.10.21 VERSAO FINAL_assinado ficha.pdf: 3413234 bytes, checksum: bbef32db71fd69f34bbf18abe4948cb1 (MD5) Approved for entry into archive by PPGCEM Ci??ncia e Engenharia de Materiais (ppgcem@ufam.edu.br) on 2021-10-25T14:00:57Z (GMT) No. of bitstreams: 5 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) 2. Carta Encaminhamento-DISSERTA????O__Stefanny Costa (2021.2)-assinado.pdf: 117382 bytes, checksum: 4c9b174e4b59777972a3f3678307c481 (MD5) 3. ATA DE DEFESA DA DISSERTA????O - Stefanny di Samuel da Silva-assinado.pdf: 288158 bytes, checksum: 9e4e93c65df9d0fab47778f5506e6b46 (MD5) 1. Ficha Catalogr??fica_Stefanny.pdf: 10332 bytes, checksum: 88c57edda43db71bff9481e643d337f2 (MD5) 4. DISSERTA????O STEFANNY 04.10.21 VERSAO FINAL_assinado ficha.pdf: 3413234 bytes, checksum: bbef32db71fd69f34bbf18abe4948cb1 (MD5) Rejected by Divis??o de Documenta????o/BC Biblioteca Central (ddbc@ufam.edu.br), reason: Na ficha catalogr??fica, substituir o tipo de documento, de TESE, para DISSERTA????O. on 2021-10-25T14:14:52Z (GMT) Submitted by Stefanny Di Samuel da Silva Costa (stefanny.costaa@gmail.com) on 2021-10-25T18:56:04Z No. of bitstreams: 5 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) 2. Carta Encaminhamento-DISSERTA????O__Stefanny Costa (2021.2)-assinado.pdf: 117382 bytes, checksum: 4c9b174e4b59777972a3f3678307c481 (MD5) 3. ATA DE DEFESA DA DISSERTA????O - Stefanny di Samuel da Silva-assinado.pdf: 288158 bytes, checksum: 9e4e93c65df9d0fab47778f5506e6b46 (MD5) 1. Ficha Catalogr??fica_Stefanny.pdf: 10267 bytes, checksum: 7e84e63ce511ff7b3e08e59e3c73dc3a (MD5) 4. DISSERTA????O STEFANNY 04.10.21 VERSAO FINAL_assinado.pdf: 3413267 bytes, checksum: 29793a3f3b488ce0ba083fb7ae5a12c1 (MD5) Approved for entry into archive by PPGCEM Ci??ncia e Engenharia de Materiais (ppgcem@ufam.edu.br) on 2021-10-27T14:58:58Z (GMT) No. of bitstreams: 5 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) 2. Carta Encaminhamento-DISSERTA????O__Stefanny Costa (2021.2)-assinado.pdf: 117382 bytes, checksum: 4c9b174e4b59777972a3f3678307c481 (MD5) 3. ATA DE DEFESA DA DISSERTA????O - Stefanny di Samuel da Silva-assinado.pdf: 288158 bytes, checksum: 9e4e93c65df9d0fab47778f5506e6b46 (MD5) 1. Ficha Catalogr??fica_Stefanny.pdf: 10267 bytes, checksum: 7e84e63ce511ff7b3e08e59e3c73dc3a (MD5) 4. DISSERTA????O STEFANNY 04.10.21 VERSAO FINAL_assinado.pdf: 3413267 bytes, checksum: 29793a3f3b488ce0ba083fb7ae5a12c1 (MD5) Approved for entry into archive by Divis??o de Documenta????o/BC Biblioteca Central (ddbc@ufam.edu.br) on 2021-10-27T16:32:51Z (GMT) No. of bitstreams: 5 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) 2. Carta Encaminhamento-DISSERTA????O__Stefanny Costa (2021.2)-assinado.pdf: 117382 bytes, checksum: 4c9b174e4b59777972a3f3678307c481 (MD5) 3. ATA DE DEFESA DA DISSERTA????O - Stefanny di Samuel da Silva-assinado.pdf: 288158 bytes, checksum: 9e4e93c65df9d0fab47778f5506e6b46 (MD5) 1. Ficha Catalogr??fica_Stefanny.pdf: 10267 bytes, checksum: 7e84e63ce511ff7b3e08e59e3c73dc3a (MD5) 4. DISSERTA????O STEFANNY 04.10.21 VERSAO FINAL_assinado.pdf: 3413267 bytes, checksum: 29793a3f3b488ce0ba083fb7ae5a12c1 (MD5) Made available in DSpace on 2021-10-27T16:32:51Z (GMT). No. of bitstreams: 5 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) 2. Carta Encaminhamento-DISSERTA????O__Stefanny Costa (2021.2)-assinado.pdf: 117382 bytes, checksum: 4c9b174e4b59777972a3f3678307c481 (MD5) 3. ATA DE DEFESA DA DISSERTA????O - Stefanny di Samuel da Silva-assinado.pdf: 288158 bytes, checksum: 9e4e93c65df9d0fab47778f5506e6b46 (MD5) 1. Ficha Catalogr??fica_Stefanny.pdf: 10267 bytes, checksum: 7e84e63ce511ff7b3e08e59e3c73dc3a (MD5) 4. DISSERTA????O STEFANNY 04.10.21 VERSAO FINAL_assinado.pdf: 3413267 bytes, checksum: 29793a3f3b488ce0ba083fb7ae5a12c1 (MD5) Previous issue date: 2021-08-17 CAPES - Coordena????o de Aperfei??oamento de Pessoal de N??vel Superior The use of natural fibers as reinforcement in cementitious matrices is a renewable and lowcost alternative that generates composites with lower density and greater tenacity. Among the various fibers produced in Brazil, we can highlight the fibers of jute and mallow, produced on a large scale in the municipality of Manacapuru in the State of Amazonas and with great potential for application in composites for civil construction due to their satisfactory mechanical properties. Thus, this work refers to the bending mechanical analysis of cementitious slabs reinforced with jute and mallow fibers. Initially, kaolin was collected at km 35 of BR 174, later it was calcined at 700 ??? for 2 hours. Afterwards, the metakaolin produced was submitted to physicochemical tests for its characterization and, finally, it was added to the cement matrix in order to reduce calcium hydroxide (Ca(OH)2). To determine its physical-mechanical properties, the cementitious matrix was subjected to tests. After optimizing the developed composite, plates were produced with partial replacement of Portland cement by metakaolin, reinforced with 3, 4 and 5 layers of fibrous fabrics treated with 2 types of treatments that were analyzed for their bending behavior. Finally, the mechanical analysis indicated that the composites molded with 4 layers of fibrous fabrics and treated with acrylic resin showed higher tenacity than the others. A utiliza????o de fibras naturais como refor??o em matrizes ciment??cias ?? uma alternativa renov??vel e de baixo custo que gera comp??sitos com menor densidade e maior tenacidade. Dentre as diversas fibras produzidas no Brasil, podemos destacar as fibras de juta e malva, produzidas em larga escala no munic??pio de Manacapuru no Estado do Amazonas. Tais fibras tem grande potencial de aplica????o em comp??sitos para a constru????o civil devido a suas propriedades mec??nicas satisfat??rias. Desta forma, este trabalho tem por objetivo analisar o desempenho de placas ciment??cias refor??adas com fibras de juta e malva quanto ao n??mero de camadas e o tipo de tratamento. Incialmente o caulim foi coletada no km 35 da BR 174, posteriormente foi calcinada a 700 ??? por 2 horas. Em seguida a metacaulim produzida foi submetida a ensaios f??sico-qu??micos para sua caracteriza????o e por fim foi adicionada na matriz ciment??cia a fim de reduzir o hidr??xido de c??lcio (Ca(OH)2). Para determina????o das suas propriedades f??sico-mec??nicas a matriz ciment??cia foi submetida a ensaios f??sico mec??nicos e ap??s isso, foram produzidas placas com substitui????o parcial do cimento Portland por metacaulim refor??adas com 3, 4 e 5 camadas de tecidos fibrosos tratados com 2 tipos de tratamentos que foram analisadas por seu comportamento a flex??o. Por fim, a an??lise mec??nica indicou que os comp??sitos moldados com 4 camadas de tecidos fibrosos e tratamento com resina acr??lica apresentou tenacidade superior aos demais.

Submitted by Ja??ne Galv??o (galvaojaine@gmail.com) on 2021-08-06T18:21:32Z No. of bitstreams: 4 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) disserta????o_ jaine.pdf: 3431480 bytes, checksum: df43caf234a78931ad64bce372f394fd (MD5) CartaEncaminhamentoTCC-TESE-DISSERTA????O.pdf: 455951 bytes, checksum: 586eb5bb0f74fb9efb6c8ec62f8e8bb3 (MD5) ATA DE DEFESA DA DISSERTA????O - Ja??ne K??ssia Lira Galv??o.pdf: 682622 bytes, checksum: cca4f67c2037efde737c45e02f10bcb6 (MD5) Approved for entry into archive by PPGCEM Ci??ncia e Engenharia de Materiais (ppgcem@ufam.edu.br) on 2021-08-06T18:24:58Z (GMT) No. of bitstreams: 4 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) disserta????o_ jaine.pdf: 3431480 bytes, checksum: df43caf234a78931ad64bce372f394fd (MD5) CartaEncaminhamentoTCC-TESE-DISSERTA????O.pdf: 455951 bytes, checksum: 586eb5bb0f74fb9efb6c8ec62f8e8bb3 (MD5) ATA DE DEFESA DA DISSERTA????O - Ja??ne K??ssia Lira Galv??o.pdf: 682622 bytes, checksum: cca4f67c2037efde737c45e02f10bcb6 (MD5) Rejected by Divis??o de Documenta????o/BC Biblioteca Central (ddbc@ufam.edu.br), reason: Na pista (palavras-chave), da ficha catalogr??fica: 1. Cimento-madeira. 2. Flex??o. 3. Inflamabilidade. 5. Tenacidade. (a primeira letra, de cada palavra, deve estar em caixa alta, o mesmo ocorre no caso de siglas). on 2021-08-06T18:45:30Z (GMT) Submitted by Ja??ne Galv??o (galvaojaine@gmail.com) on 2021-08-09T13:55:21Z No. of bitstreams: 4 CartaEncaminhamentoTCC-TESE-DISSERTA????O.pdf: 455951 bytes, checksum: 586eb5bb0f74fb9efb6c8ec62f8e8bb3 (MD5) ATA DE DEFESA DA DISSERTA????O - Ja??ne K??ssia Lira Galv??o.pdf: 682622 bytes, checksum: cca4f67c2037efde737c45e02f10bcb6 (MD5) disserta????o_ jaine.pdf: 3431491 bytes, checksum: 4de7736632ad7fba9d03abe3dcb8cb11 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Approved for entry into archive by PPGCEM Ci??ncia e Engenharia de Materiais (ppgcem@ufam.edu.br) on 2021-08-09T14:10:53Z (GMT) No. of bitstreams: 4 CartaEncaminhamentoTCC-TESE-DISSERTA????O.pdf: 455951 bytes, checksum: 586eb5bb0f74fb9efb6c8ec62f8e8bb3 (MD5) ATA DE DEFESA DA DISSERTA????O - Ja??ne K??ssia Lira Galv??o.pdf: 682622 bytes, checksum: cca4f67c2037efde737c45e02f10bcb6 (MD5) disserta????o_ jaine.pdf: 3431491 bytes, checksum: 4de7736632ad7fba9d03abe3dcb8cb11 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Rejected by Divis??o de Documenta????o/BC Biblioteca Central (ddbc@ufam.edu.br), reason: Disserta????es com restri????o de acesso (embargado) n??o devem ser depositadas pelo discente na BDTD/TEDE. Os arquivos devem ser encaminhados por e-mail. on 2021-08-09T18:18:46Z (GMT) Submitted by Ja??ne Galv??o (galvaojaine@gmail.com) on 2021-08-11T00:59:20Z No. of bitstreams: 3 CartaEncaminhamentoTCC-TESE-DISSERTA????O.pdf: 455951 bytes, checksum: 586eb5bb0f74fb9efb6c8ec62f8e8bb3 (MD5) ATA DE DEFESA DA DISSERTA????O - Ja??ne K??ssia Lira Galv??o.pdf: 682622 bytes, checksum: cca4f67c2037efde737c45e02f10bcb6 (MD5) disserta????o_ jaine.pdf: 3431491 bytes, checksum: 4de7736632ad7fba9d03abe3dcb8cb11 (MD5) Approved for entry into archive by PPGCEM Ci??ncia e Engenharia de Materiais (ppgcem@ufam.edu.br) on 2021-08-11T12:50:55Z (GMT) No. of bitstreams: 3 CartaEncaminhamentoTCC-TESE-DISSERTA????O.pdf: 455951 bytes, checksum: 586eb5bb0f74fb9efb6c8ec62f8e8bb3 (MD5) ATA DE DEFESA DA DISSERTA????O - Ja??ne K??ssia Lira Galv??o.pdf: 682622 bytes, checksum: cca4f67c2037efde737c45e02f10bcb6 (MD5) disserta????o_ jaine.pdf: 3431491 bytes, checksum: 4de7736632ad7fba9d03abe3dcb8cb11 (MD5) Approved for entry into archive by Divis??o de Documenta????o/BC Biblioteca Central (ddbc@ufam.edu.br) on 2021-08-11T16:30:13Z (GMT) No. of bitstreams: 3 CartaEncaminhamentoTCC-TESE-DISSERTA????O.pdf: 455951 bytes, checksum: 586eb5bb0f74fb9efb6c8ec62f8e8bb3 (MD5) ATA DE DEFESA DA DISSERTA????O - Ja??ne K??ssia Lira Galv??o.pdf: 682622 bytes, checksum: cca4f67c2037efde737c45e02f10bcb6 (MD5) disserta????o_ jaine.pdf: 3431491 bytes, checksum: 4de7736632ad7fba9d03abe3dcb8cb11 (MD5) Made available in DSpace on 2021-08-11T16:30:13Z (GMT). No. of bitstreams: 3 CartaEncaminhamentoTCC-TESE-DISSERTA????O.pdf: 455951 bytes, checksum: 586eb5bb0f74fb9efb6c8ec62f8e8bb3 (MD5) ATA DE DEFESA DA DISSERTA????O - Ja??ne K??ssia Lira Galv??o.pdf: 682622 bytes, checksum: cca4f67c2037efde737c45e02f10bcb6 (MD5) disserta????o_ jaine.pdf: 3431491 bytes, checksum: 4de7736632ad7fba9d03abe3dcb8cb11 (MD5) Previous issue date: 2021-07-15 FAPEAM - Funda????o de Amparo ?? Pesquisa do Estado do Amazonas This research presents the development and characterization of hybrid cementitious composites reinforced with mallow fibers and wood industry residues. To increase the durability of these materials, a matrix free of calcium hydroxide was used, through the partial replacement of Portland cement by 40% of industrial metakaolinite (MK), 15% of setting accelerator additive was added to the mixture (on the weight of the cement), in order to combat the delay and/or inhibition of the cement hardening time, caused by the amount of polysaccharides present in the wood. Short mallow fibers of 50 mm were used, randomly placed in the composite, 4% in fiber volume, and wood residues, with a 10% content, randomly dispersed in the composite, whose determination was carried out through a previous study. The composites were physically and mechanically characterized, after natural aging of 236 days, by means of 4 point bending tests, permeability of the composites, bulk density and fire propagation resistance, with the characterization of these composites after incineration through the test of 4 point bending. Fibers were characterized by scanning electron microscopy and wood residues were chemically characterized to determine the amount of chemical constituents of lignin, cellulose, hemicellulose and inorganic material. Composites with treatment (M1FM) had lower permeability than composites without treatment (M0FM), about 15.39% more permeable. The results of bending at 4 points indicated that the partial replacement of cement by MK influenced the resistance capacity when cracked, as the composites M1FM showed a cracking zone (figures 40 and 41) and the composites M0FM showed only the zone in the graphic behavior elastic. The composites with the addition of MK showed toughness resistance results higher than 18 MPa. The fire resistance test results indicated that the composites did not propagate flames instantly, however, there was a loss of 74.23% in the resistance of the lignocellulosic material, observed through the 4 point bending test. A presente pesquisa apresenta o desenvolvimento e caracteriza????o de comp??sitos ciment??cios hibrido refor??ados com fibras de malva e res??duos da ind??stria madeireira. Para aumentar a durabilidade destes mat??rias foi utilizado uma matriz livre de hidr??xido de c??lcio, por meio da substitui????o parcial do cimento Portland por 40% de Metacaulinita industrial (MK), foi adicionado ?? mistura 15% de aditivo acelerador de pega (sobre o peso do cimento), com intuito de combater o retardamento e/ou inibi????o do tempo de endurecimento do cimento, ocasionado pela quantidade de polissacar??deos presentes na madeira. Foi utilizado fibras curtas de malva de 50 mm dispostas aleatoriamente no comp??sito, 4% em volume de fibras, e res??duos de madeira, com teor de 10%, dispersos aleatoriamente no comp??sito, cuja determina????o foi realizada atrav??s de estudo pr??vio. Os comp??sitos foram caracterizados f??sico e mecanicamente, ap??s envelhecimento natural de 236 dias, por meio dos ensaios de flex??o em 4 pontos, permeabilidade dos comp??sitos, densidade aparente e resist??ncia a propaga????o do fogo, com a caracteriza????o desses comp??sitos ap??s a incinera????o atrav??s do ensaio de flex??o em 4 pontos. J?? as fibras foram caracterizadas pela microscopia eletr??nica de varredura e os res??duos de madeira foram caracterizados quimicamente para determinar a quantidade dos constituintes qu??micos de lignina, celulose, hemicelulose e material inorg??nico. Os comp??sitos com tratamento (M1FM) apresentaram menor permeabilidade que os comp??sitos sem tratamento (M0FM), cerca de 15,39% mais perme??veis. Os resultados de flex??o em 4 pontos indicaram que a substitui????o parcial do cimento por MK influenciou na capacidade de resist??ncia quando fissurado, visto que os comp??sitos M1FM apresentaram zona de fissura????o (figuras 40 e 41) e os comp??sitos M0FM demostram no comportamento gr??fico apenas a zona el??stica. Os comp??sitos com adi????o de MK apresentaram resultados de resist??ncia a tenacidade superiores de 18 MPa. Os resultados do teste de resist??ncia ao fogo indicaram que os comp??sitos n??o propagaram chamas instantaneamente, por??m, houve perda de 74,23% na resist??ncia do material lignocelul??sico, observada atrav??s do ensaio de flex??o em 4 pontos. O desenvolvimento de novos materiais que sejam sustent??veis, movimentem a economia ribeirinha e sejam funcionais para a constru????o civil

Submitted by SBI Biblioteca Digital (sbi.bibliotecadigital@puc-campinas.edu.br) on 2021-08-12T12:40:44Z No. of bitstreams: 1 VALDEMIR L?CIO ROSA.pdf: 9295907 bytes, checksum: bb7c6ce2c9c40ed81d2a9b8bbe387685 (MD5) Made available in DSpace on 2021-08-12T12:40:44Z (GMT). No. of bitstreams: 1 VALDEMIR L?CIO ROSA.pdf: 9295907 bytes, checksum: bb7c6ce2c9c40ed81d2a9b8bbe387685 (MD5) Previous issue date: 2021-06-25 Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES Lightweight prefabrication systems, enhancing technical and productive training, are investigated for their possibilities to face obstacles arising from inequalities and urban stratification, whose scale is currently a global challenge. This study was carried out by investigating relevant theoretical references, in parallel with the selection of significant examples of concrete experiences, their critical analysis and synthesis: from the Usina-CTAH collective, which conceived and executed a large volume of housing units in urban and rural situations, associated with cooperatives; of the work of architect Jo?o Filgueiras Lima (Lel?), especially for his contribution to the development of refined design techniques, manufacture and execution of works with light prefabrication and examples of technical constructive solutions by the author of this research. Faced with the precarious metropolitan conditions that expose a large contingent of population to vulnerabilities, in self-built spaces and informal settlements, this work aims to contribute to their reversal. Therefore, it is understood as possible the minimization of socio-spatial segregation, from lightweight prefabricated constructive systems, in manufactured processes. It is oriented towards the design and production of sets of components aimed at buildings and infrastructures on pedagogical bases associated with associative community experiences. The reach of feasible examples can include technical assistance, ways of generating income, technical training and spaces qualification in conditions of popular autonomy. As a result, we sought to establish evidence for the defense of these premises, considering the necessary approximation to real demands for the horizontal narrowing between academic, professional, and popular knowledge, articulated through the systematization of theory and experiences in praxis, with solidary commitments between the involved. It is intended to point to alternative techniques to heavy industrialization systems, from manufacturing towards serialization, to constitute a list of "at hand" elements, comprising their design, manufacture, and assembly, as well as exchanges and trivial trade, as a contribution for good practices at the construction site. These techniques presuppose autonomous collaborative actions in relation to hegemonic capital, with possible deployment in the production chain, articulating academia and the architect's action to social demands. Sistemas de pr?-fabrica??o leve, potencializando a forma??o t?cnica e produtiva, s?o investigadas por suas possibilidades em enfrentar obst?culos advindos das desigualdades e da estratifica??o urbana, cuja escala ? atualmente um desafio mundial. Este estudo foi realizado mediante a investiga??o de refer?ncias te?ricas concernentes, em paralelo ? sele??o de exemplaridades significativas de experi?ncias concretas, sua an?lise cr?tica e s?ntese: a partir do coletivo Usina-CTAH, que concebeu e executou grande volume de unidades habitacionais em situa??es urbanas e rurais, associado a cooperativas; da obra do arquiteto Jo?o Filgueiras Lima (Lel?), especialmente por sua contribui??o no desenvolvimento de t?cnicas apuradas de projeto, confec??o e execu??o de obras com pr?-fabrica??o leve e exemplos de solu??es t?cnico construtivas do autor desta pesquisa. Perante as condi??es metropolitanas prec?rias que exp?em grande contingente populacional a vulnerabilidades, em espa?os autoconstru?dos e assentamentos informais, este trabalho visa colaborar para sua revers?o. Para tanto entende-se como poss?vel a minimiza??o da segrega??o socioespacial, a partir de sistemas construtivos pr?-fabricados leves, em processos manufaturados. Orienta-se para a concep??o e produ??o de conjuntos de componentes voltados ? edif?cios e infraestruturas em bases pedag?gicas associadas a experi?ncias comunit?rias associativas. O alcance de exemplaridades fact?veis pode compreender a assist?ncia t?cnica, modos de gera??o de renda, forma??o t?cnica e qualifica??o dos espa?os em condi??es de autonomia popular. Como resultados, buscou-se estabelecer evid?ncias para a defesa dessas premissas, considerando a necess?ria aproxima??o ?s demandas reais para o estreitamento horizontalizado entre os saberes acad?mico, profissional e popular, articulados atrav?s da sistematiza??o da teoria a experi?ncias na pr?xis, com compromissos solid?rios entre os envolvidos. Pretende-se apontar para t?cnicas alternativas aos sistemas de industrializa??o pesada, de manufatura em dire??o ? seria??o, para constituir um rol de elementos ?ao alcance da m?o?, compreendendo sua concep??o, fabrica??o e montagem, bem como trocas e com?rcio trivial, como contribui??o para boas pr?ticas no canteiro. Estas t?cnicas pressup?em a??es colaborativas aut?nomas em rela??o ao capital hegem?nico, com poss?vel desdobramento na cadeia produtiva, articulando a academia e a a??o do arquiteto ?s demandas sociais.

Submitted by Maria Neta (henri.neta@gmail.com) on 2021-08-25T19:50:18Z No. of bitstreams: 4 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Disserta????o _Maria Henriqueta Lima _PPGEC.pdf: 1994636 bytes, checksum: 14eeab3d5c014b7a83ee9026ba9da883 (MD5) CartaEncaminhamentoTCC-TESE-DISSERTA????O.pdf: 95055 bytes, checksum: a107981d1e04e5f7f97df1f8dca8c00f (MD5) 003 2020_ ATA_DEFESA_Maria Henriqueta Concei????o Lima Neta.pdf: 139875 bytes, checksum: 88a7406a3c9d6a5708e7c6767a16fe5f (MD5) Approved for entry into archive by PPGEC Engenharia Civil (ppgec@ufam.edu.br) on 2021-09-28T23:58:39Z (GMT) No. of bitstreams: 4 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Disserta????o _Maria Henriqueta Lima _PPGEC.pdf: 1994636 bytes, checksum: 14eeab3d5c014b7a83ee9026ba9da883 (MD5) CartaEncaminhamentoTCC-TESE-DISSERTA????O.pdf: 95055 bytes, checksum: a107981d1e04e5f7f97df1f8dca8c00f (MD5) 003 2020_ ATA_DEFESA_Maria Henriqueta Concei????o Lima Neta.pdf: 139875 bytes, checksum: 88a7406a3c9d6a5708e7c6767a16fe5f (MD5) Approved for entry into archive by Divis??o de Documenta????o/BC Biblioteca Central (ddbc@ufam.edu.br) on 2021-09-29T02:09:10Z (GMT) No. of bitstreams: 4 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Disserta????o _Maria Henriqueta Lima _PPGEC.pdf: 1994636 bytes, checksum: 14eeab3d5c014b7a83ee9026ba9da883 (MD5) CartaEncaminhamentoTCC-TESE-DISSERTA????O.pdf: 95055 bytes, checksum: a107981d1e04e5f7f97df1f8dca8c00f (MD5) 003 2020_ ATA_DEFESA_Maria Henriqueta Concei????o Lima Neta.pdf: 139875 bytes, checksum: 88a7406a3c9d6a5708e7c6767a16fe5f (MD5) Made available in DSpace on 2021-09-29T02:09:10Z (GMT). No. of bitstreams: 4 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Disserta????o _Maria Henriqueta Lima _PPGEC.pdf: 1994636 bytes, checksum: 14eeab3d5c014b7a83ee9026ba9da883 (MD5) CartaEncaminhamentoTCC-TESE-DISSERTA????O.pdf: 95055 bytes, checksum: a107981d1e04e5f7f97df1f8dca8c00f (MD5) 003 2020_ ATA_DEFESA_Maria Henriqueta Concei????o Lima Neta.pdf: 139875 bytes, checksum: 88a7406a3c9d6a5708e7c6767a16fe5f (MD5) Previous issue date: 2020-12-11 The civil construction sector has great potential for the reuse of industrial waste. The incorporation of these residues in concrete and mortar has proven to be an alternative in the diversification of raw materials, as well as saving natural resources, offering new products with wide applicability in the sector itself. Research has been carried out with the use of polymeric waste in partial or total replacement of aggregate in the production of cement-based products that contribute to the reduction of this waste in landfills and dumps. This research aims to study the properties of mortars with the replacement of sand by polymeric waste. For this purpose, mortars with aggregate replacement contents of 0% (reference), 2.5%, 5%, 7.5% and 10% by mass were produced. The mix was 1:1.5 and the water/cement ratio 0.40% and kept constant for the mortars with substitution. The results show that the mortar produced with a content of 2.5%, at 28 days, showed promising mechanical properties, in the compressive strength test, even with a decrease in strength compared to the reference mortar, 28.66 MPa is obtained. And, in the bending test, it demonstrates that the addition of the residue to the mortar resulted in a strength that reached 7.85 MPa and a deformation of 0.78 mm. Thus, the incorporation of polymeric waste in the production of mortar is favorable, however it is necessary to evaluate the minimum application parameters for each purpose and future studies to improve its durability. Thus, the work presents a contribution to sustainable construction aimed at recycling industrial waste, favoring the reduction of consumption of non-renewable natural sources and collaborating with the environment. O setor da constru????o civil apresenta um grande potencial para o reaproveitamento de res??duos industriais. A incorpora????o desses res??duos no concreto e na argamassa vem se mostrando uma alternativa na diversifica????o das mat??rias-primas, bem como economia dos recursos naturais, ofertando novos produtos com vasta aplicabilidade no pr??prio setor. Pesquisas v??m sendo desenvolvidas com a utiliza????o dos res??duos polim??rico em substitui????o parcial ou total ao agregado na produ????o de produtos ?? base ciment??cia que contribuem para redu????o desses res??duos em aterros sanit??rios e lix??es. Esta pesquisa visa o estudo das propriedades de argamassas com a substitui????o da areia por res??duo polim??rico. Para isso, foram produzidas argamassas com teores de substitui????o do agregado 0% (refer??ncia), 2,5%, 5% 7,5% e 10% em massa. O tra??o foi 1:1,5 e a rela????o ??gua/cimento 0,40% e mantida constante para as argamassas com substitui????o. Os resultados apontam que a argamassa produzida com o teor de 2,5%, aos 28 dias, apresentou propriedades mec??nicas promissoras, no ensaio de resist??ncia ?? compress??o, mesmo tendo uma diminui????o da resist??ncia comparada a argamassa de refer??ncia, obtenve-se 28,66 MPa. E, no ensaio de flex??o, demonstra que a adi????o do res??duo ?? argamassa resultou em uma resist??ncia que atingiu 7,85 MPa e uma deforma????o de 0,78 mm. Desta forma, a incorpora????o de res??duo polim??rico na produ????o de argamassa ?? favor??vel, todavia ?? necess??rio avaliar os par??metros m??nimos de aplica????o para cada finalidade e estudos futuros que melhores sua durabilidade. Assim, o trabalho apresenta contribui????o com a constru????o sustent??vel visando a reciclagem do res??duo industrial, favorecendo a redu????o de consumo de fontes naturais n??o renov??veis e colaborando com o meio ambiente.

Submitted by Frank Albert Ara??jo (frankalbert@ufam.edu.br) on 2020-12-14T19:17:03Z No. of bitstreams: 4 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Disserta????o FRANK ALBERT - 14122020.pdf: 9013426 bytes, checksum: 5bd34f51a72dfe8409f21af907626649 (MD5) 002 2020_ ATA_DEFESA_Frank Albert Soares Araujo (1)-2.pdf: 274034 bytes, checksum: 9db811bcfb2f2ee423b48b844bc4bf72 (MD5) Carta Encaminhamento Autodep??sito.pdf: 201729 bytes, checksum: b0e25a53068869fd3bf0f2f88c936bb4 (MD5) Approved for entry into archive by PPGEC Engenharia Civil (ppgec@ufam.edu.br) on 2020-12-14T22:00:50Z (GMT) No. of bitstreams: 4 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Disserta????o FRANK ALBERT - 14122020.pdf: 9013426 bytes, checksum: 5bd34f51a72dfe8409f21af907626649 (MD5) 002 2020_ ATA_DEFESA_Frank Albert Soares Araujo (1)-2.pdf: 274034 bytes, checksum: 9db811bcfb2f2ee423b48b844bc4bf72 (MD5) Carta Encaminhamento Autodep??sito.pdf: 201729 bytes, checksum: b0e25a53068869fd3bf0f2f88c936bb4 (MD5) Approved for entry into archive by Divis??o de Documenta????o/BC Biblioteca Central (ddbc@ufam.edu.br) on 2020-12-15T15:20:54Z (GMT) No. of bitstreams: 4 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Disserta????o FRANK ALBERT - 14122020.pdf: 9013426 bytes, checksum: 5bd34f51a72dfe8409f21af907626649 (MD5) 002 2020_ ATA_DEFESA_Frank Albert Soares Araujo (1)-2.pdf: 274034 bytes, checksum: 9db811bcfb2f2ee423b48b844bc4bf72 (MD5) Carta Encaminhamento Autodep??sito.pdf: 201729 bytes, checksum: b0e25a53068869fd3bf0f2f88c936bb4 (MD5) Made available in DSpace on 2020-12-15T15:20:54Z (GMT). No. of bitstreams: 4 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Disserta????o FRANK ALBERT - 14122020.pdf: 9013426 bytes, checksum: 5bd34f51a72dfe8409f21af907626649 (MD5) 002 2020_ ATA_DEFESA_Frank Albert Soares Araujo (1)-2.pdf: 274034 bytes, checksum: 9db811bcfb2f2ee423b48b844bc4bf72 (MD5) Carta Encaminhamento Autodep??sito.pdf: 201729 bytes, checksum: b0e25a53068869fd3bf0f2f88c936bb4 (MD5) Previous issue date: 2020-11-27 The durability of concrete structures has become one of the main concerns of the construction industry, especially after ABNT NBR 15.575: Housing Buildings - Performance comes into force. One of the major bottlenecks of concrete structures is their low resistance to cracking, which jeopardizes their durability, in addition to allowing liquids and aggressive agents to penetrate the matrix and cause damage. These cracks can have their dimensions increased and expose the reinforcement to aggressive environments and consequently lead to structural collapse. Thus, constant inspection, maintenance and repairs to the structures are essential. However, these repairs are often costly and difficult to perform. The self-healing of concrete cracks has gained notoriety as an alternative to these factors, which consists of a phenomenon whose concrete itself has the ability to repair small cracks spontaneously, without any external intervention. The objective of this study is to evaluate the effects of the ADDITIVE REDUCING POROSITY BY CRYSTALLIZATION - ARPC on the durability of concretes produced with materials from the city of Manaus, through experimental research, analyzing the autogenous healing. Four concretes were produced with a fixed water / cement ratio of 0.58, addition of ARPC and cement, CPII Z-40-RS and CP II E-32 were used. In these concretes, the properties of compressive strength at 28 days under 100% and 90% rupture load were analyzed for the induction of micro-cracks in concretes and subsequent evaluation of healing at 84 days by means of compressive strength. The properties of voids index, total absorption, capillarity absorption, chloride ion migration and concrete microstructure were also evaluated. As a result, it was found that ARPC performs better in concretes produced with CP II Z-40 RS, mainly at the age of 84 days. In addition, concretes with the addition of ARPC present better performance in the percentage of recovery of compressive strength. In the voids and total absorption indices, the concrete with ARPC and CP II Z-40 RS presented the lowest values. In capillarity absorption, concretes with the addition of ARPC showed lower absorption rates and lower capillary rise. The microstructure showed typical crystals of self-healing concrete such as etringite and calcium carbonate. In the migration of chloride ions, the concretes produced with CP II E-32 showed the lowest concentrations, which is due to the fact of the cement composition with the presence of blast furnace slag. A durabilidade das estruturas de concreto tem se tornado umas das principais preocupa????es da ind??stria da constru????o civil, principalmente ap??s a ABNT NBR 15.575: Edifica????es Habitacionais ??? Desempenho entrar em vigor. Um dos grandes gargalos das estruturas de concreto ?? sua baixa resist??ncia ?? fissura????o que colocam em risco a sua durabilidade, al??m de permitir que l??quidos e agentes agressivos possam penetrar na matriz e causar danos. Estas fissuras podem ter suas dimens??es aumentadas e expor as armaduras ?? ambientes agressivos e consequentemente levar ao colapso estrutural. Assim, a inspe????o, manuten????o e reparos constantes das estruturas s??o indispens??veis. Por??m, por muitas vezes estes reparos s??o onerosos e de dif??cil execu????o. A autocicatriza????o das fissuras do concreto tem ganhado notoriedade como alternativa a estes fatores, que consiste em um fen??meno cujo pr??prio concreto apresenta a capacidade de repara????o de pequenas fissuras de forma expontanea, sem nenhuma interven????o externa. O objetivo deste estudo ?? avaliar os efeitos do ADITIVO REDUTOR DE POROSIDADE POR CRISTALIZA????O - ARPC na durabilidade de concretos produzidos com materiais da cidade de Manaus, por meio de pesquisa experimental, analisando a cicatriza????o aut??gena. Foram produzidos quatro concretos com rela????o ??gua/cimento fixa de 0,58, adi????o de ARPC e cimentos, utilizou-se o CPII Z- 40-RS e o CP II E-32. Nestes concretos foram analisadas as propriedades de resist??ncia ?? compress??o aos 28 dias sob a carga de ruptura de 100% e 90% para a indu????o de microfissuras nos concretos e posterior avalia????o da cicatriza????o aos 84 dias por meio da resist??ncia ?? compress??o. Tamb??m foram avaliadas as propriedades de ??ndice de vazios, absor????o total, absor????o por capilaridade, migra????o de ??ons cloretos e microestrutura do concreto. Como resultado foi constatado que o ARPC apresenta melhor desempenho nos concretos produzidos com o CP II Z-40 RS, principalmente, na idade de 84 dias. Al??m disso, os concretos com a adi????o do ARPC apresentam melhor desempenho no percentual de recupera????o da resist??ncia ?? compress??o. Nos ??ndices de vazios e absor????o total o concreto com ARPC e CP II Z-40 RS apresentou os menores valores. Na absor????o por capilaridade os concretos com a adi????o do ARPC apresentaram menores ??ndices de absor????o e menor ascens??o capilar. A microestrutura apresentou cristais t??picos de concretos autocicatrizantes como etringita e carbonato de c??lcio. Na migra????o de ??ons cloretos os concretos produzidos com o CP II E-32 apresentaram as menores concentra????es, o que se deve ao fato da composi????o do cimento com a presen??a da esc??ria de alto forno. Como nunca havia feito um dep??sito, tive dificuldades, mas depois foi mais tranquilo. Sem informa????es adicionais.

Submitted by Sabrina Santana (sabrina_s_s@hotmail.com) on 2020-07-24T02:46:01Z No. of bitstreams: 3 Disserta????o Final Sabrina - corrigida.pdf: 2952646 bytes, checksum: bb3d14ca7ead444395db822146259cac (MD5) Carta Encaminhamento Autodep??sito__Disserta????o Sabrina.pdf: 55019 bytes, checksum: 7b74f9159d1781e8e0270bb8bf530617 (MD5) Ata de Defesa de Disserta????o - Sabrina Santana V??LIDA.pdf: 311911 bytes, checksum: d4d8275d7cfa4485dfe71639c6b04913 (MD5) Approved for entry into archive by PPGCEM Ci??ncia e Engenharia de Materiais (ppgcem@ufam.edu.br) on 2020-07-31T00:49:07Z (GMT) No. of bitstreams: 3 Disserta????o Final Sabrina - corrigida.pdf: 2952646 bytes, checksum: bb3d14ca7ead444395db822146259cac (MD5) Carta Encaminhamento Autodep??sito__Disserta????o Sabrina.pdf: 55019 bytes, checksum: 7b74f9159d1781e8e0270bb8bf530617 (MD5) Ata de Defesa de Disserta????o - Sabrina Santana V??LIDA.pdf: 311911 bytes, checksum: d4d8275d7cfa4485dfe71639c6b04913 (MD5) Rejected by Divis??o de Documenta????o/BC Biblioteca Central (ddbc@ufam.edu.br), reason: Na ficha catalogr??fica, corrigir o g??nero da palavra "Orientadora", uma vez que se trata de docente do sexo masculino (Jean Carlos Silva Andrade). on 2020-07-31T23:43:27Z (GMT) Submitted by Sabrina Santana (sabrina_s_s@hotmail.com) on 2020-08-01T00:08:57Z No. of bitstreams: 3 Carta Encaminhamento Autodep??sito__Disserta????o Sabrina.pdf: 55019 bytes, checksum: 7b74f9159d1781e8e0270bb8bf530617 (MD5) Ata de Defesa de Disserta????o - Sabrina Santana V??LIDA.pdf: 311911 bytes, checksum: d4d8275d7cfa4485dfe71639c6b04913 (MD5) Disserta????o Sabrina - Final.pdf: 2953797 bytes, checksum: c9341f60ef0f4f9f259dcf53082e8657 (MD5) Approved for entry into archive by PPGCEM Ci??ncia e Engenharia de Materiais (ppgcem@ufam.edu.br) on 2020-08-03T18:22:03Z (GMT) No. of bitstreams: 3 Carta Encaminhamento Autodep??sito__Disserta????o Sabrina.pdf: 55019 bytes, checksum: 7b74f9159d1781e8e0270bb8bf530617 (MD5) Ata de Defesa de Disserta????o - Sabrina Santana V??LIDA.pdf: 311911 bytes, checksum: d4d8275d7cfa4485dfe71639c6b04913 (MD5) Disserta????o Sabrina - Final.pdf: 2953797 bytes, checksum: c9341f60ef0f4f9f259dcf53082e8657 (MD5) Approved for entry into archive by Divis??o de Documenta????o/BC Biblioteca Central (ddbc@ufam.edu.br) on 2020-08-03T19:49:47Z (GMT) No. of bitstreams: 3 Carta Encaminhamento Autodep??sito__Disserta????o Sabrina.pdf: 55019 bytes, checksum: 7b74f9159d1781e8e0270bb8bf530617 (MD5) Ata de Defesa de Disserta????o - Sabrina Santana V??LIDA.pdf: 311911 bytes, checksum: d4d8275d7cfa4485dfe71639c6b04913 (MD5) Disserta????o Sabrina - Final.pdf: 2953797 bytes, checksum: c9341f60ef0f4f9f259dcf53082e8657 (MD5) Made available in DSpace on 2020-08-03T19:49:47Z (GMT). No. of bitstreams: 3 Carta Encaminhamento Autodep??sito__Disserta????o Sabrina.pdf: 55019 bytes, checksum: 7b74f9159d1781e8e0270bb8bf530617 (MD5) Ata de Defesa de Disserta????o - Sabrina Santana V??LIDA.pdf: 311911 bytes, checksum: d4d8275d7cfa4485dfe71639c6b04913 (MD5) Disserta????o Sabrina - Final.pdf: 2953797 bytes, checksum: c9341f60ef0f4f9f259dcf53082e8657 (MD5) Previous issue date: 2020-05-25 FAPEAM - Funda????o de Amparo ?? Pesquisa do Estado do Amazonas Electroplating is a chemical or electrolytic process where a thin layer of a metal is applied over a part that can be metallic or not, to give resistance, beauty and prevent corrosion of these parts. Because it is an activity that generates toxic waste, they are dangerous, and cause impacts to the environment and living beings when disposed of inappropriately. This research aims to verify the incorporation of electroplating sludge from a company in the Manaus industrial pole in the clay mass for the manufacture of red ceramics. The raw materials were collected and characterized by means of X-ray fluorescence tests, X-ray diffraction, thermal analysis (TG and DSC), Atterberg indexes and particle analysis. Based on a 2?? factorial experimental design, samples were formulated with incorporation of the residue in the proportions of 0, 10 and 20% by weight in the clay, the sintering temperatures were 850, 950 and 1050??C and 60 min firing levels were used, 120 min and 180 min. Specimens with dimensions of 60x20x5 mm?? were prepared by uniaxial pressing of 30 MPa. Technological properties such as water absorption, linear burning shrinkage, flexural rupture stress, apparent porosity, apparent specific mass were evaluated. In addition, the immobilization in the ceramic body of the dangerous elements present in the galvanic sludge was evaluated, by means of the leaching test (NBR 10005) and scanning electron microscopy (SEM) of the rupture section. It was found that the increase in the incorporation of electroplating sludge reduced the compressive strength and increased the linear shrinkage, apparent porosity and water absorption. Although the introduction of galvanic sludge has influenced the mechanical and physical properties, these parameters are sufficient according to the values required by normative standards. Through factorial planning, it was possible to verify that water absorption and the flexural tensile strength of the specimens with a percentage of up to 20% of residue in the ceramic mass, can be suitable for the production of solid bricks for sealing, bricks for sealing with horizontal holes and tiles meeting the requirements required by NBR 15270-1 and by the literature. It was also found that the sintering temperature for the percentage of 20% may be lower than the maximum used (1050 ??C), promoting energy savings. The leaching test indicated immobilization of the Cr metal analyzed according to NBR 10004, making it possible to use this residue to minimize the negative impacts caused to the environment and human health. A galvanoplastia ?? um processo qu??mico ou eletrol??tico onde uma fina camada de um metal ?? aplicada sobre uma pe??a que pode ser met??lica ou n??o, para dar resist??ncia, beleza e evitar a corros??o dessas pe??as. Por se tratar de uma atividade geradora de res??duos t??xicos, os mesmos s??o perigosos, e causam impactos ao meio ambiente e aos seres vivos quando descartados de forma inadequada. Esta pesquisa tem como objetivo verificar a incorpora????o do lodo de galvanoplastia, proveniente de uma empresa do polo industrial de Manaus na massa argilosa para a fabrica????o de cer??mica vermelha. As mat??rias-primas foram coletadas e caracterizadas por meios de ensaios de fluoresc??ncia de raios-X, difra????o de raios-X, an??lises t??rmicas (TG e DSC), ??ndices de Atterberg e an??lise granulom??trica. Tomando como base um planejamento experimental fatorial 2?? foram formuladas amostras com incorpora????o do res??duo nas propor????es de 0, 10 e 20% em peso na argila, as temperaturas de sinteriza????o foram de 850, 950 e 1050??C e se utilizou patamares de queima de 60 min, 120 min e 180 min. Foram preparados corpos de prova com dimens??es de 60x20x5 mm??, por prensagem uniaxial de 30 MPa. Foram avaliadas as propriedades tecnol??gicas como absor????o de ??gua, retra????o linear de queima, tens??o de ruptura ?? flex??o, porosidade aparente, massa espec??fica aparente. Complementarmente foi avaliada a imobiliza????o no corpo cer??mico dos elementos perigosos presentes no lodo galv??nico, por meio do ensaio de lixivia????o (NBR 10005) e microscopia eletr??nica de varredura (MEV) da se????o de ruptura. Foi constatado que o aumento da incorpora????o do lodo de galvanoplastia reduziu a resist??ncia ?? compress??o e aumentou a retra????o linear, porosidade aparente e absor????o de ??gua. Embora a introdu????o do lodo galv??nico tenha influenciado nas propriedades mec??nicas e f??sicas, esses par??metros s??o suficientes de acordo com os valores exigidos pelos padr??es normativos. Por meio do planejamento fatorial, foi poss??vel verificar que absor????o de ??gua e a tens??o de ruptura ?? flex??o dos corpos de provas com percentual de at?? 20% de res??duo na massa cer??mica, podem ser adequados para a produ????o de tijolos maci??os para a veda????o, tijolos para veda????o com furos horizontais e telhas atendendo aos requisitos exigidos pela NBR 15270-1 e pela literatura. Verificou-se tamb??m que a temperatura de sinteriza????o para a porcentagem de 20% pode ser menor que a m??xima usada (1050 ??C), promovendo uma economia de energia. O teste de lixivia????o, indicou imobiliza????o do metal Cr analisado de acordo com a NBR 10004, tornando-se poss??vel a utiliza????o desse res??duo para minimizar os impactos negativos causados ao meio ambiente e a sa??de humana.

Submitted by Celso Magalhaes (celsomagalhaes@ufrrj.br) on 2022-06-13T14:02:04Z No. of bitstreams: 1 2020 - Felipe Almeida Soares.pdf: 1103389 bytes, checksum: c7ca6b41f07403186db5bb11f328fee5 (MD5) Made available in DSpace on 2022-06-13T14:02:04Z (GMT). No. of bitstreams: 1 2020 - Felipe Almeida Soares.pdf: 1103389 bytes, checksum: c7ca6b41f07403186db5bb11f328fee5 (MD5) Previous issue date: 2020-04-09 CAPES - Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior The study aimed to evaluate the effect of three additives (bacterial inoculant, urea and whey) on the silage of crushed and rehydrated corn grain. Three trials were carried out in a completely randomized design, with four replicates per treatment. Two sources of crushed corn (corn A and B) purchased from local stores were used, since there was no amount necessary for making experimental silos with only one source of corn. In experiment 1, corn A was rehydrated with distilled water and / or the use of commercial bacterial inoculant (Lactobacillus plantarum, Propionibacterium acidipropionici) in the doses of: 0; 50; 75; 100; 125; and 150% of the dose recommended by the manufacturer, totaling 24 experimental units. In experiment 2, urea was used in doses: 0; 0.5; 1.0; 1.5; 2.0; and 2.5% of fresh matter (FM), totaling 24 experimental units. In experiment 3, corn B was rehydrated with distilled water and / or the use of whey, in the doses: 0; 25; 50; 75; and 100% replacing water, totaling 20 experimental units. The crushed grain, after application of the treatments, was packed in PVC mini-silos and compacted. The mini-silos were 50 cm high and 10 cm in diameter, fitted with lids with Bunsen-type valves, and at the bottom there was a fabric bag (TNT) containing sand for the accumulation of effluents. After 45 days of closing, the mini-silos were weighed, opened and samples were collected for chemical evaluations. Content were determined dry matter (DM), crude protein (CP), mineral matter (MM), ethereal extract (EE), gross energy (GE) and total carbohydrates (CHT), pH, gas losses (GL), effluent losses (EL) and dry matter recovery (DMR). The results were analyzed for normality, by the Shapiro-Wilk test, homogeneity, by the Bartlett test and by the Analysis of Variance (ANOVA) with 5% significance. Regression analysis was used. Statistical analyzes were performed using the ExpDes.pt package of the RStudio? statistical software, version 3.5.3. The bacterial inoculant reduces gas losses, increases dry matter recovery and provides lower pH values. The bacterial inoculant reduces gas losses, increases dry matter recovery and provides lower pH values. Based on the observed results, it recommends the use of 100% of the dose recommended by the manufacturer. Urea increases the values of crude protein and pH, however, there is an increase in gas losses, with less recovery of dry matter. For this additive, inclusions of up to 1.18% of the MN are recommended. The use of whey was effective in reducing the pH. The 52% dose showed the lowest gas losses and the highest dry matter content O objetivo do estudo foi avaliar o efeito de tr?s aditivos (inoculante bacteriano, ureia e soro de leite) na ensilagem de gr?o de milho triturado e reidratado. Foram realizados tr?s ensaios em delineamento inteiramente casualizado, com quatro repeti??es por tratamento. Foram utilizadas duas fontes de milho triturado (milho A e B) adquiridas no com?rcio local, visto que n?o havia quantidade necess?ria para a confec??o dos silos experimentais com apenas uma fonte de milho. No experimento 1, o milho A foi reidratado com ?gua destilada e/ou utiliza??o de inoculante bacteriano comercial (Lactobacillus plantarum, Propionibacterium acidipropionici) nas doses de: 0; 50; 75; 100; 125; e 150% da dose recomendada pelo fabricante, totalizando 24 unidades experimentais. No experimento 2 foi utilizado a ureia nas doses: 0; 0,5; 1,0; 1,5; 2,0; e 2,5% da mat?ria natural (MN), totalizando 24 unidades experimentais. No experimento 3, o milho B foi reidratado com ?gua destilada e/ou utiliza??o de soro de leite, nas doses: 0; 25; 50; 75; e 100% em substitui??o ? ?gua, totalizando 20 unidades experimentais. O gr?o triturado, ap?s aplica??o dos tratamentos, foi acondicionado em mini-silos de PVC e compactado. Os mini-silos tinham as dimens?es de 50 cm de altura e 10 cm de di?metro, providos de tampas com v?lvulas do tipo Bunsen e, no fundo havia um saco de tecido (TNT) contendo areia para ac?mulo de efluentes. Ap?s 45 dias do fechamento, os mini-silos foram pesados, abertos e recolhidas amostras para as avalia??es qu?micas. Determinou-se conte?do de mat?ria seca (MS), teor de prote?na bruta (%PB), mat?ria mineral (%MM), extrato et?reo (%EE), energia bruta (EB kcal/kg) e carboidratos totais (%CHT), pH, perda por gases (%PG), efluente (PE kg/tMN) e recupera??o da mat?ria seca (%RMS). Os resultados foram analisados para normalidade, pelo teste de Shapiro-Wilk, homogeneidade, pelo teste de Bartlett e pela An?lise de Vari?ncia (ANOVA) com signific?ncia de 5%. Utilizou-se an?lise de regress?o. As an?lises estat?sticas foram realizadas utilizando-se o pacote ExpDes.pt do software estat?stico RStudio?, vers?o 3.5.3. O inoculante bacteriano reduz as perdas por gases, aumenta a recupera??o da mat?ria seca e proporciona menores valores de pH. Com base nos resultados observados, preconiza o uso de 100% da dose recomendada pelo fabricante. A ureia eleva os valores de prote?na bruta e pH, por?m, h? aumento das perdas por gases, com menor recupera??o da mat?ria seca. Para esse aditivo recomenda-se inclus?es de at? 1,18% da MN. A utiliza??o de soro de leite foi eficaz em reduzir o pH. A dose de 52% apresentou as menores perdas por gases e maior conte?do de mat?ria seca

Submitted by Jorge Silva (jorgelmsilva@ufrrj.br) on 2023-01-24T16:04:35Z No. of bitstreams: 1 2020 - Lorhaine Bernardes de Lima.pdf: 637182 bytes, checksum: f98b90251f2a3da75c41c5c1f647305e (MD5) Made available in DSpace on 2023-01-24T16:04:35Z (GMT). No. of bitstreams: 1 2020 - Lorhaine Bernardes de Lima.pdf: 637182 bytes, checksum: f98b90251f2a3da75c41c5c1f647305e (MD5) Previous issue date: 2020-03-05 CAPES - Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior The objective of the study was to evaluate agronomic characteristics and chemical composition of two maize hybrids, Santa Helena (2B339) and Biomatrix (BM3061) submitted to two spacing (45 and 90 centimeters) and four population densities (60,000, 70,000, 80,000 and 90,000 plants ha-1). The design was in randomized blocks in a 2x4x2 factorial scheme, with four replications. Production of green mass (MV), dry matter (MS), plant height, stem diameter, ear corn insertion height, ear length and diameter, number of ears corn per plant, proportion of leaf, stem and ear corn components were estimated) and bromatological MS, ash (MM), crude protein (PB), neutral detergent fiber (FDN), acid detergent fiber (FDA), cellulose (CEL), hemicellulose (HEM) and lignin (LIG). From the hybrid BM3061, silages were made with the spacing and population densities as treatment, outlined in randomized blocks and in a factorial scheme two (spacing) x four (densities), with four replications. Levels of MS, MM, PB, FDN, FDA, CEL, HEM and LIG were also determined. The data set was analyzed with SISVAR? and the means compared by the Tukey test at 5% probability and by regression for population density data. The MS productivity was higher at the highest densities 90,000, 80,000 and 70,000 plants ha-1 (4,855.99; 4,275.22; 4,138.08 kg ha-1 MS). The number of ears corn per plant was higher at lower densities due to less competition for nutrients and solar radiation and in the BM3061 hybrid. The proportions of leaf and stem were higher in BM3061 and that of ear corn in 2B339. There was a hybrid ? density ? spacing interaction (p = 0.020) for the leaf proportion where BM3061 was superior to 2B339 when cultivated with 90 cm spacing and at densities of 70,000 and 80,000 plants ha-1. There was density x hybrid interaction for the length of ears corn (p = 0.01). The highest length (27.81 cm) occurred for the hybrid BM3061 planted with a density of 70,000 plants ha-1. The leaf stalk relationship did not differ between treatments. The ear diameter was larger in the 2B339 (5.34 cm), possibly due to the better filling of the grains. In the pre-ensiled material, the MS content was higher in 2B339 (38.04%) and the contents of FDN, FDA, CEL and LIG were higher in BM3061 (55.4; 27.20, 20.64 and 5.06%). In addition, there was density x hybrid interaction for LIG, with greater value for BM3061 at density of 80,000 plants ha-1. For silage evaluations, the pH varied as a function of densities, with a higher value for 70,000 plants ha-1 (3.6562), which may indicate an adequate fermentation process. There was no significant difference between MS (p=0,56), MM (p=0,11) and PB (p=0,70), however the values of FDN, FDA, CEL, HEM were higher in the 45 cm spacing (52.68; 27.21; 21.66; 25.47%), respectively. However, it is concluded that the hybrid 2B339 proved to be superior in the conditions presented when destined for corn silage, the reduction in spacing between lines negatively affects bromatological characteristics of the silage. O objetivo do estudo foi avaliar caracter?sticas agron?micas e composi??o bromatol?gica de dois h?bridos de milho, o Santa Helena (2B339) e Biomatrix (BM3061) submetidos a dois espa?amentos (45 e 90 cent?metros) e quatro densidades populacionais (60.000, 70.000, 80.000 e 90.000 plantas ha-1). O delineamento foi em blocos casualizados em esquema fatorial 2x4x2, com quatro repeti??es. Foram estimadas produ??o de massa verde (MV), massa seca (MS), altura de planta, di?metro do colmo, altura de inser??o de espiga, comprimento e di?metro da espiga, n?mero de espigas por planta, propor??o dos componentes folha, colmo e espiga) e bromatol?gicas (MS, mm, PB, FDN, FDA, CEL, HEM e LIG). A partir do h?brido BM3061 foram feitas silagens com os espa?amentos e as densidades populacionais como tratamento, delineado em blocos casualizados e em esquema fatorial dois (espa?amentos) x quatro (densidades), com quatro repeti??es. Tamb?m foram determinados teores de MS, MM, PB, FDN, FDA, CEL, HEM e LIG. O conjunto de dados foi analisado com o SISVAR? e as m?dias comparadas pelo teste de Tukey ? 5% de probabilidade e pela regress?o para dados de densidades populacionais. A produtividade MS foi superior nas densidades mais altas 90.000, 80.000 e 70.000 pl ha-1 (4.855,99; 4.275,22; 4.138,08 kg ha-1 de MS. J? o n?mero de espigas por planta foi mais alto nas densidades mais baixas devido a menor competi??o por nutrientes e radia??o solar e no h?brido BM3061. As propor??es de folha e de colmo foram superiores no BM3061 e a de espiga no 2B339. Houve intera??o h?brido ? densidade ? espa?amento (p=0,020) para a propor??o folha onde o BM3061 se mostrou superior ao 2B339 quando cultivado com espa?amento de 90 cm e nas densidades de 70.000 e 80.000 plantas ha-1. Houve intera??o densidade x h?brido para o comprimento de espigas (p=0,01). O comprimento mais alto (27,81 cm) ocorreu para o h?brido BM3061 plantado com densidade 70.000 plantas ha-1. A rela??o folha colmo n?o diferiu entre os tratamentos. O di?metro de espiga foi maior no 2B339 (5,34 cm), possivelmente devido ao melhor enchimento dos gr?os. No material pr?-ensilado o teor de MS foi mais elevado no 2B339 (38,04%) e os teores de FDN, FDA, CEL e LIG foram superiores no BM3061 (55,4; 27,20, 20,64 e 5,06%). Al?m disso, houve intera??o densidade x h?brido para LIG, com maior valor para o BM3061 em densidade de 80.000 plantas ha-1. Para as avalia??es das silagens o pH variou em fun??o das densidades, com maior valor para 70.000 plantas ha-1 (3,6562), que pode indicar um processo fermentativo adequado. N?o houve diferen?a significativa entre MS (p=0,56), MM (p=0,11) e PB (p=0,70), no entanto os valores de FDN, FDA, CEL, HEM foram superiores no espa?amento de 45 cm (52,68; 27,21; 21,66; 25,47%), respectivamente. No entanto, conclui-se que o h?brido 2B339 se mostrou superior nas condi??es apresentadas quando destinado a silagem de milho, a redu??o no espa?amento entre linhas afeta negativamente caracter?sticas bromatol?gicas da silagem.

Submitted by Jorge Silva (jorgelmsilva@ufrrj.br) on 2023-01-16T17:21:51Z No. of bitstreams: 1 2020 - Joice F?tima Moreira Silva.pdf: 3384831 bytes, checksum: 906a272acda2926770189953d3ea6601 (MD5) Made available in DSpace on 2023-01-16T17:21:51Z (GMT). No. of bitstreams: 1 2020 - Joice F?tima Moreira Silva.pdf: 3384831 bytes, checksum: 906a272acda2926770189953d3ea6601 (MD5) Previous issue date: 2020-02-20 CAPES - Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior FAPERJ - Funda??o Carlos Chagas Filho de Amparo ? Pesquisa do Estado do Rio de Janeiro The objective was to characterize the seven certified organic dairy farms in the state of Rio de Janeiro in terms of production, nutritional management, health management and milk quality. It was also intended to conduct a case study in one of these organic editions studied with milk quality and monitoring of subclinical mastitis by somatic cell count (SCC). Visits take place from April to December 2019. Data were recorded through recorded interviews with users (or guardians), using a semi-structured questionnaire. Milk samples from six properties (in September and December 2019) of the expansion tank or cans were collected for analysis of composition indicators, SCC, total bacterial count (TBC) and presence of antibiotic residues in the milk. These samples were analyzed at the Cl?nica de Leite (ESALQ / USP), in Piracicaba, SP. Retroactive data from one of the activities studied on the milk quality of the expansion tank, from December 2016 to June 2019, and the SCC analyzes of 68 animals, from January 2017 to April 2018, were grouped and evaluated. All data were analyzed in a descriptive and exploratory manner with quantitative and qualitative approach. The producers were on average 60 years old, 72% were male and had completed higher education. The average size of the properties was 149.5 hectares. The average daily total milk production was 194.3 L/day. The average number of lactating cows was 22 animals, with an average production of 8.7 L/cow. Of the properties, 86% used a mechanized milking, adopted roughage and concentrate supplementation for lactating cows and presented veterinary assistance; and all use homeopathy to control diseases. The main related health problems were: ectoparasites, abortion, worms and mastitis. The average SCC of the properties was 363 x 103 SC/mL in the final dry period and 483 x 103 SC/mL in the beginning of the rainy season. The average TBC was 382 x 103 colony-forming units (CFU)/mL and all properties were negative for antibiotic residues in milk. Regarding the results of the individuals SCC of case study, the percentage of chronic cows ranged from 14% (July/2017) to 31% (November/2017) and for cured cows, they ranged from 0% in (July/2017) to 36% (April/2018). It was found a low utilization of the areas of the properties, which can be better used for the production of organic inputs and contribute to their self-sufficiency. Homeopathy was an alternative therapy mostly adopted. As for milk quality, on average as a property of compliance with IN n? 76/2018 in all required parameters, suggesting that alternative sanitary practices are efficient. Monitoring of the subclinical mastitis through the individual SCC uses a tool that helps the producer or disease prevention strategies. Objetivou-se caracterizar as sete propriedades leiteiras org?nicas certificadas no estado do Rio de Janeiro quanto ? produ??o, manejo nutricional, manejo sanit?rio e qualidade do leite. Pretendeu-se, tamb?m, realizar um estudo de caso em uma destas fazendas org?nicas estudadas quanto ? qualidade do leite e monitoramento da mastite subcl?nica pela contagem de c?lulas som?ticas (CCS) individuais. As visitas ocorreram de abril a dezembro de 2019. Os dados foram obtidos por meio de entrevistas realizadas com os propriet?rios (ou respons?veis), utilizando-se um question?rio semiestruturado. Foram coletadas amostras de leite em seis propriedade (em setembro e dezembro de 2019) do tanque de expans?o ou lat?es para an?lise dos indicadores de composi??o, CCS, contagem bacteriana total (CBT) e presen?a de res?duos de antibi?ticos no leite. Estas amostras foram analisadas no Laborat?rio Cl?nica do Leite (ESALQ/USP), em Piracicaba, SP. Dados retroativos de uma das fazendas estudadas sobre a qualidade do leite do tanque de expans?o, no per?odo de dezembro de 2016 a junho de 2019, e an?lises de CCS individuais de 68 animais, no per?odo de janeiro de 2017 a abril de 2018, foram agrupados e avaliados. Todos os dados foram analisados de forma descritiva, explorat?ria e com abordagem quantitativa e qualitativa. Os produtores tinham em m?dia 60 anos de idade, 72% eram do g?nero masculino e apresentavam ensino superior completo. O tamanho m?dio das propriedades foi de 149, 5 hectares. A m?dia da produ??o total di?ria de leite foi de 194,3 L/dia. O n?mero m?dio de vacas em lacta??o foi de 22 animais, com produ??o m?dia de 8,7 L/vaca ordenhada. Das propriedades, 86% utilizavam a ordenha mecanizada, adotavam a suplementa??o de volumoso e concentrado para vacas em lacta??o e apresentavam assist?ncia veterin?ria; e todas utilizavam a homeopatia para controle das enfermidades. Os principais problemas sanit?rios relatados foram: ectoparasitos, aborto, verminose e mastite. A m?dia de CCS das propriedades foi de 363 x 103 CS/mL no final do per?odo seco e de 483 x 103 CS/mL no in?cio do per?odo chuvoso. A m?dia de CBT foi de 382 x 103 unidades formadoras de col?nia (UFC)/mL e todas as propriedades apresentaram negatividade para res?duos de antibi?tico no leite. Em rela??o aos resultados de CCS individuais do estudo de caso, o percentual de vacas cr?nicas variou de 14% (julho/2017) a 31% (novembro/2017) e para vacas curadas variou de 0% em (julho/2017) a 36% (abril/2018). Constatou-se um baixo aproveitamento das ?reas das propriedades, que poderiam ser melhor utilizadas para a produ??o de insumos org?nicos e contribuir para a autossufici?ncia das mesmas. A homeopatia foi a terapia alternativa majoritariamente adotada. Quanto ? qualidade do leite, na m?dia as propriedade apresentaram conformidade com a IN n? 76/2018 em todos os par?metros exigidos, sugerindo que as pr?ticas sanit?rias alternativas s?o eficientes. O monitoramento da mastite subcl?nica atrav?s da CCS individual constitui uma ferramenta que auxilia o produtor nas estrat?gias de preven??o da doen?a.

Submitted by Erick da Silva Oliveira (erick20_oliveira@hotmail.com) on 2022-04-13T18:01:53Z No. of bitstreams: 3 ata de defesa mestradoo.pdf: 112196 bytes, checksum: 21b6bc9c8c635289db7781a7c40c9fbb (MD5) CartaEncaminhamentoAutodep??sito (Erick) (1).pdf: 74481 bytes, checksum: 25161e3c6d8a15638d033bbe12fd74de (MD5) Disserta????o Erick Oliveira - final_12_01_2021.pdf: 3239919 bytes, checksum: 55913cbcb282c947178853233cbdec2c (MD5) Approved for entry into archive by PPGEC Engenharia Civil (ppgec@ufam.edu.br) on 2022-04-13T18:03:21Z (GMT) No. of bitstreams: 3 ata de defesa mestradoo.pdf: 112196 bytes, checksum: 21b6bc9c8c635289db7781a7c40c9fbb (MD5) CartaEncaminhamentoAutodep??sito (Erick) (1).pdf: 74481 bytes, checksum: 25161e3c6d8a15638d033bbe12fd74de (MD5) Disserta????o Erick Oliveira - final_12_01_2021.pdf: 3239919 bytes, checksum: 55913cbcb282c947178853233cbdec2c (MD5) Approved for entry into archive by Divis??o de Documenta????o/BC Biblioteca Central (ddbc@ufam.edu.br) on 2022-04-15T01:32:58Z (GMT) No. of bitstreams: 3 ata de defesa mestradoo.pdf: 112196 bytes, checksum: 21b6bc9c8c635289db7781a7c40c9fbb (MD5) CartaEncaminhamentoAutodep??sito (Erick) (1).pdf: 74481 bytes, checksum: 25161e3c6d8a15638d033bbe12fd74de (MD5) Disserta????o Erick Oliveira - final_12_01_2021.pdf: 3239919 bytes, checksum: 55913cbcb282c947178853233cbdec2c (MD5) Made available in DSpace on 2022-04-15T01:32:58Z (GMT). No. of bitstreams: 3 ata de defesa mestradoo.pdf: 112196 bytes, checksum: 21b6bc9c8c635289db7781a7c40c9fbb (MD5) CartaEncaminhamentoAutodep??sito (Erick) (1).pdf: 74481 bytes, checksum: 25161e3c6d8a15638d033bbe12fd74de (MD5) Disserta????o Erick Oliveira - final_12_01_2021.pdf: 3239919 bytes, checksum: 55913cbcb282c947178853233cbdec2c (MD5) Previous issue date: 2020-02-14 In the search for new technological solutions for application in civil construction, this study produced geopolymeric slabs with the addition of bamboo fiber Bambusa vulgaris var. ???Vittata??? as well as characterized its properties and analyzed the physical and mechanical characteristics that the fiber / matrix set are capable of producing as well as the effect of the immersion treatment of bamboo fibers was analyzed before its use as a reinforcement in the geopolymeric matrix. For the characterization of the bamboo fiber its contents of extractives, lignin, holocellulose and alpha cellulose were analyzed as well as its moisture content (The following results were revealed: Moisture (9.78), Ash (0.77), Extracts (0.89) , Lignin (15.10), Holocellulose (64.95), Alfacellulose (70.91). In the geopolymer analysis, the X-ray fluorescence (FRX) and the X-ray diffraction (DRX) of the precursor materials were analyzed. in addition to strength tests with compression and flexion loads as well as the ability to seal the plates through the permeability test. Promising results were identified both in the characterization of the fibers, confirming their reinforcing power as well as their applicability as reinforcement in the geopolymeric matrix having a flexural strength gain that increased from 1.2 MPa in the case of the fiber-free matrix to 5.6 MPa in the matrix with the addition of 10% bamboo fiber. Na busca por novas solu????es tecnol??gicas para aplica????o na constru????o civil este estudo produziu placas geopolim??ricas com adi????o de fibra de bambu Bambusa vulgaris var. ???Vittata??? bem como caracterizou suas propriedades e analisou as caracter??sticas f??sicas e mec??nicas que o conjunto fibra/matriz s??o capazes de produzir bem como analisou-se o efeito do tratamento por imers??o das fibras de bambu previamente a sua utiliza????o como refor??o na matriz geopolim??rica. Para a caracteriza????o da fibra de bambu foram analisados seus teores de extrativos, lignina, holocelulose e alfacelulose bem como seu teor de umidade (Revelaram os seguintes resultados Umidade (9,78), Cinzas (0,77), Extrativos (0,89), Lignina (15,10), Holocelulose (64,95), Alfacelulose (70,91). Na an??lise do geopol??mero foram analisadas a fluoresc??ncia de raio-x (FRX) e a difra????o de raio-x (DRX) dos materiais percursores al??m de ensaios de for??a com cargas de compress??o e flex??o bem como a capacidade de estanqueidade das placas por meio do ensaio de permeabilidade. Identificou-se resultados promissores tanto na caracteriza????o das fibras confirmando seu poder de refor??o como em sua aplicabilidade como refor??o na matriz geopolim??rica tendo um ganho de resist??ncia a flex??o que elevou de 1,2 MPa no caso da matriz sem fibras para 5,6 MPa na matriz com adi????o de 10% de fibra de bambu.

Submitted by Eduarda Barbosa (eduardapereira@ufam.edu.br) on 2020-01-29T20:16:03Z No. of bitstreams: 3 Disserta????o Eduarda Final.pdf: 4708032 bytes, checksum: 78f9ff41b5f134229654f0fbdbb1d9f3 (MD5) Carta de encaminhamento de Autodep??sito.pdf: 446696 bytes, checksum: 58eb0906772f86acfb4dd88ee5b1343b (MD5) Ata de Defesa.pdf: 363629 bytes, checksum: 86e97ecaf8eeb5381eafd8f2ca60f91e (MD5) Approved for entry into archive by Engenharia Civil PPGEC (ppgec@ufam.edu.br) on 2020-01-30T22:32:15Z (GMT) No. of bitstreams: 3 Disserta????o Eduarda Final.pdf: 4708032 bytes, checksum: 78f9ff41b5f134229654f0fbdbb1d9f3 (MD5) Carta de encaminhamento de Autodep??sito.pdf: 446696 bytes, checksum: 58eb0906772f86acfb4dd88ee5b1343b (MD5) Ata de Defesa.pdf: 363629 bytes, checksum: 86e97ecaf8eeb5381eafd8f2ca60f91e (MD5) Approved for entry into archive by Divis??o de Documenta????o/BC Biblioteca Central (ddbc@ufam.edu.br) on 2020-02-03T15:55:49Z (GMT) No. of bitstreams: 3 Disserta????o Eduarda Final.pdf: 4708032 bytes, checksum: 78f9ff41b5f134229654f0fbdbb1d9f3 (MD5) Carta de encaminhamento de Autodep??sito.pdf: 446696 bytes, checksum: 58eb0906772f86acfb4dd88ee5b1343b (MD5) Ata de Defesa.pdf: 363629 bytes, checksum: 86e97ecaf8eeb5381eafd8f2ca60f91e (MD5) Made available in DSpace on 2020-02-03T15:55:49Z (GMT). No. of bitstreams: 3 Disserta????o Eduarda Final.pdf: 4708032 bytes, checksum: 78f9ff41b5f134229654f0fbdbb1d9f3 (MD5) Carta de encaminhamento de Autodep??sito.pdf: 446696 bytes, checksum: 58eb0906772f86acfb4dd88ee5b1343b (MD5) Ata de Defesa.pdf: 363629 bytes, checksum: 86e97ecaf8eeb5381eafd8f2ca60f91e (MD5) Previous issue date: 2019-12-04 Funda????o de Amparo ?? Pesquisa do Estado do Amazonas In the northeast of Amazonas, the kaolin belonging to the Alter do Ch??o formation emerges along the access roads to the municipalities of Manaus, Presidente Figueiredo and Itacoatiara, such as BR-174 and AM-010. This material when subjected to thermal activation by calcination, under certain temperature ranges, results in an amorphous material with disordered crystalline structure, called metakaolin or metakaolinite (MK). It has good reactivity with calcium hydroxide present in mixtures made of Portland cement, which makes it suitable for use as supplementary cementitious material in the production of pastes, mortars and concretes. Thus, the present research has the general objective to characterize the kaolin collected from BR 174 for the production of metakaolin and its use as supplementary cementitious material in cementitious pastes. The possibility of use in cementitious pastes implies its chemical and microstructural characterization through the techniques of X-ray fluorescence, X-ray diffraction (XRD), thermogravimetric analysis (TG / DTG / DTA), infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The transformations occurred in this material resulting from the calcination treatment to which it was submitted were studied, this occurred in the temperature ranges of 600 ??C, 650 ??C and 700 ??C in the time intervals of 1h, 2h and 3h in a muffle furnace. The analyzes carried out established the calcination at a temperature of 650 ??C with a time of 1h. In the chemical composition, there was a predominance of silicon oxide (SiO2) and aluminum oxide (Al2O3), compatible with the composition of the main mineral identified in the DRX, kaolinite. To evaluate the behavior of metakaolin produced as supplementary cementitious material, it was used to partially replace cement in cementitious pastes in the contents of 20% to 60%. These pastes were characterized by the techniques of CKD, TG / DTG, SEM and resistance to compression at the ages of 7, 28 and 91 days of cure. No nordeste do Amazonas, aflora o caulim pertencente ?? forma????o Alter do Ch??o no decorrer das rodovias de acesso aos munic??pios de Manaus, Presidente Figueiredo e Itacoatiara, como a BR-174 e AM-010. Este material quando submetido ?? ativa????o t??rmica por calcina????o, sob determinadas faixas de temperatura, resulta em um material amorfo de estrutura cristalina desordenada, denominado metacaulim ou metacaulinita (MK). Apresenta boa reatividade com o hidr??xido de c??lcio presente nas misturas constitu??das de cimento Portland, o que o torna indicado para uso como material ciment??cio suplementar na produ????o de pastas, argamassas e concretos. Assim, a presente pesquisa tem como objetivo geral caracterizar o caulim coletado da BR 174 para a produ????o de metacaulinita e sua utiliza????o como material ciment??cio suplementar em pastas ciment??cias. A possibilidade de utiliza????o em pastas ciment??cias implica na sua caracteriza????o qu??mica e microestrutural atrav??s das t??cnicas de fluoresc??ncia de raios-X, difra????o de raios-x (DRX), an??lise termogravim??trica (TG/DTG/DTA), espectroscopia de infravermelho (FTIR) e microscopia eletr??nica de varredura (MEV). Foram estudadas as transforma????es ocorridas neste material decorrente do tratamento de calcina????o ao qual foi submetido, este ocorreu nas faixas de temperatura de 600 ??C, 650 ??C e 700 ??C nos intervalos de tempo de 1h, 2h e 3h em forno mufla. Por meio da an??lises realizadas foi estabelecida a calcina????o na temperatura de 650 ??C com o tempo de 1h. Na composi????o qu??mica ocorreu a predomin??ncia do ??xido de sil??cio (SiO2) e ??xido de alum??nio (Al2O3), compat??veis com a composi????o do principal mineral identificado no DRX, a caulinita. Para avaliar o comportamento da metacaulinita produzida como material ciment??cio suplementar, a mesma foi utilizada em substitui????o parcial ao cimento em pastas ciment??cias nos teores de 20% a 60%. Estas pastas foram caracterizadas por meio das t??cnicas de DRC, TG/DTG, MEV e resist??ncia ?? compress??o nas idades de 7, 28 e 91 dias de cura. Exitem muitas abas para preencher. Al??m disso o idioma do portal n??o colabora, pois aparece horas em ingl??s e portugu??s.

Submitted by Luana Oliveira (civiluana@gmail.com) on 2020-02-24T20:19:59Z No. of bitstreams: 3 Disserta????o_LuanaOliveira_PPGEC.pdf: 2481014 bytes, checksum: 0919b0c88481bb83475dd133007002c3 (MD5) ATA defesa Luana Barbosa-2020022413939 PM.pdf: 436591 bytes, checksum: a9efc23b73bdfff2c28dae65091810df (MD5) Carta_Autodep??sito - Luana.pdf: 31625 bytes, checksum: 59644408aa604f74ea11708911b9a4ea (MD5) Approved for entry into archive by PPGEC Engenharia Civil (ppgec@ufam.edu.br) on 2020-03-06T21:28:37Z (GMT) No. of bitstreams: 3 Disserta????o_LuanaOliveira_PPGEC.pdf: 2481014 bytes, checksum: 0919b0c88481bb83475dd133007002c3 (MD5) ATA defesa Luana Barbosa-2020022413939 PM.pdf: 436591 bytes, checksum: a9efc23b73bdfff2c28dae65091810df (MD5) Carta_Autodep??sito - Luana.pdf: 31625 bytes, checksum: 59644408aa604f74ea11708911b9a4ea (MD5) Approved for entry into archive by Divis??o de Documenta????o/BC Biblioteca Central (ddbc@ufam.edu.br) on 2020-03-09T12:40:49Z (GMT) No. of bitstreams: 3 Disserta????o_LuanaOliveira_PPGEC.pdf: 2481014 bytes, checksum: 0919b0c88481bb83475dd133007002c3 (MD5) ATA defesa Luana Barbosa-2020022413939 PM.pdf: 436591 bytes, checksum: a9efc23b73bdfff2c28dae65091810df (MD5) Carta_Autodep??sito - Luana.pdf: 31625 bytes, checksum: 59644408aa604f74ea11708911b9a4ea (MD5) Made available in DSpace on 2020-03-09T12:40:49Z (GMT). No. of bitstreams: 3 Disserta????o_LuanaOliveira_PPGEC.pdf: 2481014 bytes, checksum: 0919b0c88481bb83475dd133007002c3 (MD5) ATA defesa Luana Barbosa-2020022413939 PM.pdf: 436591 bytes, checksum: a9efc23b73bdfff2c28dae65091810df (MD5) Carta_Autodep??sito - Luana.pdf: 31625 bytes, checksum: 59644408aa604f74ea11708911b9a4ea (MD5) Previous issue date: 2019-11-29 Industrial processes generate a significant variety of residues which is difficult to decompose. The main goal of this research is to present an alternative for the final destination of this materials, specifically polystyrene. While main polymers are based of carbon structures, geopolymers are based of silica and alumina structures. Among possible applications, they can be used in pastes, mortars and concretes, replacing Portland cement. For the addition of the industrial residue in the geopolymer matrix was made its characterization, as well as the precursors of the geopolymer. The Fourier Transform Infrared Spectroscopy (FTIR) analysis demonstrates that the residue used has in its chemical composition a higher amount of silicon dioxide and aluminum dioxide. The results of X-ray diffraction (XRD) analysis on the residue sample and the geopolymer matrix confirm the chemical composition provided by the industry, as well as the geopolymerization process. Thermogravimetry (TG) and thermogravimetry derived (DTG) analysis show that the residue has very little water loss prior to total sample degradation. The compressive strength test showed a significant improvement on the residue???s incorporation to the geopolymer matrix, reaching at 28 days about 29.13 MPa (5% ground residue) and 4.44 MPa (5% screened residue). The flexure test demonstrates that the addition of the sieved residue to the matrix resulted in an improvement in strength that reached 2.07 and a 0.66mm deformation, about 7.73% higher than the matrix. Os processos industriais geram uma variedade significativa de res??duos, de dif??cil decomposi????o final. A proposta dessa pesquisa ?? apresentar uma alternativa para a deposi????o final desse res??duo, mais especificamente do poliestireno. Enquanto os pol??meros convencionais s??o formados por estruturas de carbono, geopol??meros s??o constitu??dos de estruturas de s??lica e alumina. Dentre as poss??veis aplica????es, eles podem ser empregados em pastas, argamassas e concretos, em substitui????o ao cimento Portland. Para a adi????o do res??duo industrial na matriz geopolim??rica foi feita sua caracteriza????o, bem como dos precursores do geopol??mero. A an??lise de espectroscopia de infravermelho com transformada de Fourier (FTIR) demonstra que o res??duo utilizado possui em sua composi????o qu??mica uma maior quantidade de di??xido de sil??cio e di??xido de alum??nio. Os resultados da an??lise de difra????o de raios-X (DRX), feitos na amostra de res??duo e na matriz geopolim??rica confirma a composi????o qu??mica fornecida pela ind??stria bem com o processo de geopolimeriza????o. A an??lise de termogravimetria (TG) e derivada de termogravimetria (DTG) demonstram que o res??duo possui uma perda muito pequena de ??gua antes da degrada????o total da amostra. O ensaio de resist??ncia a compress??o evidenciou uma melhora significativa na incorpora????o do res??duo ?? matriz geopolim??rica atingindo aos 28 dias cerca de 29,13 MPa (5% res??duo mo??do) e 40,44 MPa (5% res??duo peneirado). O ensaio de flex??o demonstra que a adi????o do res??duo peneirado a matriz resultou em uma melhora na resist??ncia que atingiu 2,07 e uma deforma????o de 0,66mm, cerca de 7,73% maior em rela????o a matriz.

Submitted by Leonardo Lima (leonardolima@ufam.edu.br) on 2020-01-10T13:20:36Z No. of bitstreams: 4 Disserta????o-corre????o final - Leonardo-mesclado.pdf: 4168927 bytes, checksum: 4fad65b6ab1e7fe47df497ac32636706 (MD5) ATA de defesa da disserta????o.pdf: 504288 bytes, checksum: 3b4c26da895da0bf816abd4ade0a1604 (MD5) carta.pdf: 381173 bytes, checksum: 68e2450bf15289d3d1d0f8cf54297e3d (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Approved for entry into archive by Engenharia Civil PPGEC (ppgec@ufam.edu.br) on 2020-01-13T15:08:26Z (GMT) No. of bitstreams: 4 Disserta????o-corre????o final - Leonardo-mesclado.pdf: 4168927 bytes, checksum: 4fad65b6ab1e7fe47df497ac32636706 (MD5) ATA de defesa da disserta????o.pdf: 504288 bytes, checksum: 3b4c26da895da0bf816abd4ade0a1604 (MD5) carta.pdf: 381173 bytes, checksum: 68e2450bf15289d3d1d0f8cf54297e3d (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Approved for entry into archive by Divis??o de Documenta????o/BC Biblioteca Central (ddbc@ufam.edu.br) on 2020-01-13T18:36:40Z (GMT) No. of bitstreams: 4 Disserta????o-corre????o final - Leonardo-mesclado.pdf: 4168927 bytes, checksum: 4fad65b6ab1e7fe47df497ac32636706 (MD5) ATA de defesa da disserta????o.pdf: 504288 bytes, checksum: 3b4c26da895da0bf816abd4ade0a1604 (MD5) carta.pdf: 381173 bytes, checksum: 68e2450bf15289d3d1d0f8cf54297e3d (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Made available in DSpace on 2020-01-13T18:36:40Z (GMT). No. of bitstreams: 4 Disserta????o-corre????o final - Leonardo-mesclado.pdf: 4168927 bytes, checksum: 4fad65b6ab1e7fe47df497ac32636706 (MD5) ATA de defesa da disserta????o.pdf: 504288 bytes, checksum: 3b4c26da895da0bf816abd4ade0a1604 (MD5) carta.pdf: 381173 bytes, checksum: 68e2450bf15289d3d1d0f8cf54297e3d (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2019-11-28 . Civil construction constantly needs technological innovations in order to reduce environmental impacts and improve the energy efficiency of construction processes, always aiming at the economy and, more recently, sustainability. In this context, bamboo fibers are inserted in the production of composites, since they have good results in mechanical properties such as tensile strength, being compared to steel, but lighter, among other advantages such as fast cultivation and large availability, important factors for sustainable development. The aim of this study is to develop and characterize bamboo fiber reinforced cementitious composites of Bambusa vulgaris species, easily found in the North and Northeast regions of the country. In order to avoid fiber degradation inside the mortar, treatments were performed on matrix, replacing 50% of the mass cement with pozzolan metacaulim, which reduces the formation of Ca(OH)2, a substance harmful to the fibers; also the chemical process of mercerization were performed in the fibers themselves, which was efficient in the concentration of 10% of NaOH. Bambusa vulgaris presented a specific mass of 1.4 g / cm?? and tensile strength of 388 MPa, which are excellent reinforcement properties. Long and short fiber bamboo cementitious boards were produced, the last ones are the ones that best improved their mechanical characteristics with a 42% increase in flexural strength with 2% reinforcement, while the 6% reinforcement provided an increase of 344% in toughness. Long fiber composites obtained the lowest densities, with a reduction of 12%. A constru????o civil necessita constantemente de inova????es tecnol??gicas, com a finalidade de diminuir os impactos ambientais e aprimorar a efici??ncia energ??tica dos processos construtivos, sempre visando a economia e, mais recentemente, a sustentabilidade. Nesse contexto, inserem-se as fibras de bambu na produ????o de comp??sitos, haja vista que det??m bons resultados nas propriedades mec??nicas como a resist??ncia ?? tra????o, chegando a ser comparadas ao a??o, por??m, mais leves, entre outras vantagens como r??pido cultivo e grande disponibilidade, fatores importantes para o desenvolvimento sustent??vel. O objetivo do presente estudo ?? desenvolver e caracterizar comp??sitos ciment??cios refor??ados com fibras de bambu da esp??cie Bambusa vulgaris, facilmente encontrada nas regi??es Norte e Nordeste do pa??s. Com a finalidade de evitar a degrada????o das fibras no interior da argamassa, foram realizados tratamentos tanto na matriz, com a substitui????o de 50 % do cimento em massa pela pozolana metacaulim, que reduz a forma????o de Ca(OH)2, subst??ncia prejudicial ??s fibras; como o processo qu??mico de merceriza????o nas pr??prias fibras, que se mostrou eficiente na concentra????o de 10 % de NaOH. A Bambusa vulgaris apresentou massa espec??fica de 1,4 g/cm?? e resist??ncia ?? tra????o de 388 MPa, ??timas propriedades buscadas para refor??o. Foram produzidas placas ciment??cias com fibras longas e com fibras curtas de bambu, nos teores de 2, 4 e 6 % de fibra-cimento. Os comp??sitos com fibras curtas foram as que melhor aprimoraram suas caracter??sticas mec??nicas com aumento de 42% na resist??ncia ?? flex??o com 2% de refor??o, enquanto o refor??o de 6% proporcionou uma majora????o de 344% na tenacidade. As placas com fibras longas obtiveram as menores densidades, com redu????o de at?? 12%.

Submitted by Fernanda Oikawa (fernandaoikawa@outlook.com) on 2020-03-02T05:36:11Z No. of bitstreams: 5 DISSERTA????O - FERNANDA OIKAWA.pdf: 2673868 bytes, checksum: 46da856525c1de2386f55ab4bd12a1d9 (MD5) Novo Documento 2020-02-28 11.21.37.pdf: 77724 bytes, checksum: c9edbcaf55afacb18ac69febbb253c18 (MD5) ata Fernanda (3).pdf: 119366 bytes, checksum: d1700842da967b501671e08e09b74565 (MD5) ficha catalogr??fica.pdf: 2346 bytes, checksum: f1e1173481cd5ac34bd65aca14e5348b (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Rejected by PPGEC Engenharia Civil (ppgec@ufam.edu.br), reason: Informamos que n??o consta na disserta????o, a folha de aprova????o (banca de defesa). A ordem ?? capa/contra capa/ ficha catalogr??fica / folha de Aprova????o (n??o ?? necess??rio estar assinada) on 2020-03-06T21:45:10Z (GMT) Submitted by Fernanda Oikawa (fernandaoikawa@outlook.com) on 2020-03-07T01:33:47Z No. of bitstreams: 5 Novo Documento 2020-02-28 11.21.37.pdf: 77724 bytes, checksum: c9edbcaf55afacb18ac69febbb253c18 (MD5) ata Fernanda (3).pdf: 119366 bytes, checksum: d1700842da967b501671e08e09b74565 (MD5) ficha catalogr??fica.pdf: 2346 bytes, checksum: f1e1173481cd5ac34bd65aca14e5348b (MD5) DISSERTA????O - FERNANDA OIKAWA.pdf: 2845206 bytes, checksum: 0809ae0faa150f87be66f2d011e92a30 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Approved for entry into archive by PPGEC Engenharia Civil (ppgec@ufam.edu.br) on 2020-03-10T14:04:20Z (GMT) No. of bitstreams: 5 Novo Documento 2020-02-28 11.21.37.pdf: 77724 bytes, checksum: c9edbcaf55afacb18ac69febbb253c18 (MD5) ata Fernanda (3).pdf: 119366 bytes, checksum: d1700842da967b501671e08e09b74565 (MD5) ficha catalogr??fica.pdf: 2346 bytes, checksum: f1e1173481cd5ac34bd65aca14e5348b (MD5) DISSERTA????O - FERNANDA OIKAWA.pdf: 2845206 bytes, checksum: 0809ae0faa150f87be66f2d011e92a30 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Approved for entry into archive by Divis??o de Documenta????o/BC Biblioteca Central (ddbc@ufam.edu.br) on 2020-03-10T14:34:10Z (GMT) No. of bitstreams: 5 Novo Documento 2020-02-28 11.21.37.pdf: 77724 bytes, checksum: c9edbcaf55afacb18ac69febbb253c18 (MD5) ata Fernanda (3).pdf: 119366 bytes, checksum: d1700842da967b501671e08e09b74565 (MD5) ficha catalogr??fica.pdf: 2346 bytes, checksum: f1e1173481cd5ac34bd65aca14e5348b (MD5) DISSERTA????O - FERNANDA OIKAWA.pdf: 2845206 bytes, checksum: 0809ae0faa150f87be66f2d011e92a30 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Made available in DSpace on 2020-03-10T14:34:10Z (GMT). No. of bitstreams: 5 Novo Documento 2020-02-28 11.21.37.pdf: 77724 bytes, checksum: c9edbcaf55afacb18ac69febbb253c18 (MD5) ata Fernanda (3).pdf: 119366 bytes, checksum: d1700842da967b501671e08e09b74565 (MD5) ficha catalogr??fica.pdf: 2346 bytes, checksum: f1e1173481cd5ac34bd65aca14e5348b (MD5) DISSERTA????O - FERNANDA OIKAWA.pdf: 2845206 bytes, checksum: 0809ae0faa150f87be66f2d011e92a30 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2019-11-21 The present research involves production and characterization of cementitious composites with pozzolan addition reinforced with mauve fibers, arranged in the form of short fibers (disoriented) with 2% volume and long fibers (oriented in one direction) for volumes of 6%, 8% e 10%. Natural fibers are very interesting in the field of scientific research, and promotes the concept of sustainability. Its improve the mechanical performance of cementitious composites when used properly applied as reinforcemente. Therefore, the development of a cement matrix with calcium hydroxide reduction through the incorporation of calcined clay, which is a metakaolin from kaolin from the Amazon region, intends to avoid the deterioration of the reinforcement employed. The composites produced were mechanically tested by four point bending test. Laminates with 10% of treated long fibers have higher ductility than the other laminates produced, which is confirmed by the multiple cracking behavior and also an equivalent flexural stress higher, which averages 43MPa. While the most fragile composite reached an average of 12MPa, for 2% volume of short fibers, besides presenting sudden rupture, without significant amounts of visible cracks. O presente estudo envolve a produ????o e caracteriza????o de comp??sitos de matriz ciment??cia com adi????o de pozolana, refor??ados com fibras de malva, nas formas de fios longos (orientados em uma ??nica dire????o) para teores de 6%, 8% e 10% e de fios curtos (desorientados) com teor de 2%. A utiliza????o de fibras naturais promove o conceito de sustentabilidade e pode melhorar o desempenho mec??nico de comp??sitos ciment??cios ao ser utilizada como refor??o, desde que aplicado adequadamente. Portanto, o desenvolvimento de uma matriz ciment??cia com redu????o de hidr??xido de c??lcio, atrav??s da incorpora????o de argila calcinada, sendo esta uma metacaulinita oriunda do caulim da regi??o amaz??nica, tem a inten????o de evitar a deteriora????o do refor??o empregado. Os comp??sitos produzidos foram ensaiados mecanicamente, por meio de ensaio de flex??o em quatro pontos. Os laminados com 10% de fibras longas tratadas, apresentaram ductilidade superior aos demais, o que se confirma pelo comportamento de m??ltipla fissura????o e, ainda, uma tens??o equivalente de flex??o superior aos demais comp??sitos, que atinge em m??dia 43MPa. Enquanto o comp??sito mais fr??gil atingiu uma m??dia de 12MPa, para 2% de fibras curtas, al??m de apresentar ruptura brusca, sem quantidades significativas de fissuras vis??veis.

Submitted by Virlane Cunha (virlanereis@gmail.com) on 2020-07-29T15:44:58Z No. of bitstreams: 4 DISSERTA????O FINAL (PDF).pdf: 2164551 bytes, checksum: 43a2c5e95bbaa6243df02d98f2945714 (MD5) CARTA DE AUTO DEPO??SITO_Virlane (1).pdf: 234851 bytes, checksum: ed2656e24d6015a05bfc1cf4445b729d (MD5) ATA DE DEFESA (DIGITALIZADA).pdf: 1100659 bytes, checksum: b3c9513398c14bd01f125a72a70fa472 (MD5) Ficha catologr??fica.pdf: 1915 bytes, checksum: 092d8ccc1a4fd273bbc2efa5dc90e0bb (MD5) Rejected by PPGEC Engenharia Civil (ppgec@ufam.edu.br), reason: A carta de dep??sito precisa estar assinada pelo orientador. on 2020-08-11T19:31:22Z (GMT) Submitted by Virlane Cunha (virlanereis@gmail.com) on 2020-08-11T19:46:52Z No. of bitstreams: 5 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) DISSERTA????O FINAL (PDF).pdf: 2164551 bytes, checksum: 43a2c5e95bbaa6243df02d98f2945714 (MD5) CARTA DE AUTO DEPO??SITO_Virlane (1).pdf: 234851 bytes, checksum: ed2656e24d6015a05bfc1cf4445b729d (MD5) ATA DE DEFESA (DIGITALIZADA).pdf: 1100659 bytes, checksum: b3c9513398c14bd01f125a72a70fa472 (MD5) Ficha catologr??fica.pdf: 1915 bytes, checksum: 092d8ccc1a4fd273bbc2efa5dc90e0bb (MD5) Rejected by PPGEC Engenharia Civil (ppgec@ufam.edu.br), reason: A Carta de autodeposito n??o foi assinada pelo orientador. on 2020-08-17T20:42:21Z (GMT) Submitted by Virlane Cunha (virlanereis@gmail.com) on 2020-08-18T21:26:33Z No. of bitstreams: 5 DISSERTA????O FINAL (PDF).pdf: 2164551 bytes, checksum: 43a2c5e95bbaa6243df02d98f2945714 (MD5) ATA DE DEFESA (DIGITALIZADA).pdf: 1100659 bytes, checksum: b3c9513398c14bd01f125a72a70fa472 (MD5) Ficha catologr??fica.pdf: 1915 bytes, checksum: 092d8ccc1a4fd273bbc2efa5dc90e0bb (MD5) CARTA DE AUTO DEP??SITO_Virlane-convertido.docx: 90154 bytes, checksum: 0e60a1e66b84848f89973091a34e43bb (MD5) carta.pdf: 55077 bytes, checksum: bb9b23bfa2213237bc8d1a75fc6cd137 (MD5) Approved for entry into archive by PPGEC Engenharia Civil (ppgec@ufam.edu.br) on 2020-08-24T12:27:30Z (GMT) No. of bitstreams: 5 DISSERTA????O FINAL (PDF).pdf: 2164551 bytes, checksum: 43a2c5e95bbaa6243df02d98f2945714 (MD5) ATA DE DEFESA (DIGITALIZADA).pdf: 1100659 bytes, checksum: b3c9513398c14bd01f125a72a70fa472 (MD5) Ficha catologr??fica.pdf: 1915 bytes, checksum: 092d8ccc1a4fd273bbc2efa5dc90e0bb (MD5) CARTA DE AUTO DEP??SITO_Virlane-convertido.docx: 90154 bytes, checksum: 0e60a1e66b84848f89973091a34e43bb (MD5) carta.pdf: 55077 bytes, checksum: bb9b23bfa2213237bc8d1a75fc6cd137 (MD5) Approved for entry into archive by Divis??o de Documenta????o/BC Biblioteca Central (ddbc@ufam.edu.br) on 2020-08-24T19:14:32Z (GMT) No. of bitstreams: 5 DISSERTA????O FINAL (PDF).pdf: 2164551 bytes, checksum: 43a2c5e95bbaa6243df02d98f2945714 (MD5) ATA DE DEFESA (DIGITALIZADA).pdf: 1100659 bytes, checksum: b3c9513398c14bd01f125a72a70fa472 (MD5) Ficha catologr??fica.pdf: 1915 bytes, checksum: 092d8ccc1a4fd273bbc2efa5dc90e0bb (MD5) CARTA DE AUTO DEP??SITO_Virlane-convertido.docx: 90154 bytes, checksum: 0e60a1e66b84848f89973091a34e43bb (MD5) carta.pdf: 55077 bytes, checksum: bb9b23bfa2213237bc8d1a75fc6cd137 (MD5) Made available in DSpace on 2020-08-24T19:14:32Z (GMT). No. of bitstreams: 5 DISSERTA????O FINAL (PDF).pdf: 2164551 bytes, checksum: 43a2c5e95bbaa6243df02d98f2945714 (MD5) ATA DE DEFESA (DIGITALIZADA).pdf: 1100659 bytes, checksum: b3c9513398c14bd01f125a72a70fa472 (MD5) Ficha catologr??fica.pdf: 1915 bytes, checksum: 092d8ccc1a4fd273bbc2efa5dc90e0bb (MD5) CARTA DE AUTO DEP??SITO_Virlane-convertido.docx: 90154 bytes, checksum: 0e60a1e66b84848f89973091a34e43bb (MD5) carta.pdf: 55077 bytes, checksum: bb9b23bfa2213237bc8d1a75fc6cd137 (MD5) Previous issue date: 2019-11-18 Currently the biggest challenge for civil construction is to combine the performance of a given material with the reduction of the environmental impact of its production without this process being too expensive. Another highlight is the problem of premature degradation in composites reinforced with natural fibers, which influences the performance of the cementitious matrix, as the concrete presents a greater permeability, during hydration allows other aggressive elements to enter, leading to carbonation and attack of chloride ions resulting in corrosion problems promoting the alkalinity of the cementitious matrix. In composites reinforced with natural fibers, the water present in the pores is highly alkaline, causing dissolution of hemicellulose and lignin and alkaline hydrolysis of cellulose molecules, reducing the degree of polymerization and resistance of the fibers. In addition, hydration products, especially calcium hydroxide, migrate to the walls, lumens and voids of the fibers, causing mineralization of the fibers.In view of the search for new sources of renewable energy aiming at the practice of actions for sustainable development. The white pitch resin stands out as a waterproofing agent, due to its hydrophobicity, observed in the caulking of boats, which can contribute to the waterproofing of fibers, for the realization of light concrete, exhausting the attack on carbonation in cementitious matrices, as well as polymeric matrix in production of composites reinforced with vegetable fibers, contributing to a highly renewable development, and green when compared to resins based on polyurethanes obtained by isocyanates. In the present study, the extraction and characterization of the white rosin resin from the Amazon was carried out and the potential of the resin was evaluated in the waterproofing of a??a?? residues from Amazonas and jute and mauve fabric, in making natural composites. The pitch resin characterization was performed by CG / EM mass spectrometry techniques, infrared analysis coupled to FT / IR fourrier transform, and X-ray diffraction analysis, which validated the extraction fractions in ethanol and acetate the composition of the constituents of the main rosin genus Protium Hepthaphyllum, the pentacyclic compounds of alpha and beta amirine and ammonia. The thermal stability of the extracts was investigated through TGA thermogravimetric analysis, the compounds are made up of OH groups, which results in a strong intermolecular bond, on average the thermal stability guides 250 ?? C. In aqueous media, the extracts resulted in a solid hydrophobic dispersion, as a result of this quality in water absorption tests, the pitch resins extracted in ethanol and acetate were evaluated, which did not show dispersion when compared to industrial resin. As for prospecting for the waterproofing potential of rosin resins, it was evaluated by pouring it as a surface coating on a??a?? stone residues in order to qualify the waterproofing potential amid the severe alkaline attacks promoted during the hydration of the cementitious mass, the best waterproofing method was used for heated pitch resin, the specimens that had the aggregates, waterproofed with the resin had a resistance of 6.49 MPa, resisting and inhibiting severe conditions of alkalinity and carbonation of the cementitious matrix. For the production of laminated composites, the use of extracted or heated pitch resin did not promote the protection of the fibers in the cement matrix, nor did it promote the resistance quality. As for the flexion test, the best resistance index was given to the covering of the jute and mauve fabrics, waterproofed with the industrial resin that promoted resistance on average of 7.87 (MPa). Key words: White rosin from the Amazon; Description; Light composites; Laminated composites. Atualmente o maior desafio da constru????o civil ?? aliar o desempenho de um determinado material com a redu????o do impacto ambiental de sua produ????o sem que este processo seja demasiadamente oneroso. Outro destaque se d?? para o problema de degrada????o prematura em comp??sitos refor??ados com fibras naturais, que influ??ncia o desempenho da matriz ciment??cia, pois o concreto apresenta uma maior permeabilidade, durante a hidrata????o permite outros elementos agressivos entrar, levando a carbonata????o e ataque de ??ons cloreto resultando em problemas de corros??o promovendo a alcalinidade da matriz ciment??cia. Em comp??sitos refor??ados com fibras naturais, a ??gua presente nos poros ?? altamente alcalina, ocasionando dissolu????o da hemicelulose e lignina e hidr??lise alcalina das mol??culas de celulose, reduzindo o grau de polimeriza????o e resist??ncia das fibras. Al??m disso, os produtos de hidrata????o, principalmente o hidr??xido de c??lcio, migram para paredes, lumens e vazios das fibras, ocasionando mineraliza????o das fibras. Diante da busca por novas fontes de energias renov??veis visando ?? pr??tica de a????es para um desenvolvimento sustent??vel. A resina de breu branco se destaca, como impermeabilizante, em fun????o da sua hidrofobicidade, observada na calafeta????o de barcos, podendo contribuir na impermeabiliza????o de fibras, para realiza????o de concretos leves, exaurindo o ataque a carbonata????o em matrizes ciment??cias, bem como matriz polim??rica na produ????o de comp??sitos refor??ados com fibras vegetais, corraborando para um desenvolvimento altamente renov??vel, e verde quando comparada a resinas a base de poliuretanos obtidos por isocianatos. No presente estudo realizou-se a extra????o e caracteriza????o da resina de breu branco da Amaz??nia e avaliou-se o potencial da resina na impermeabiliza????o de caro??os res??duos de a??a?? do Amazonas e tecido de juta e malva, na confec????o de comp??sitos naturais. A caracteriza????o da resina de breu foi realizada pelas t??cnicas de espectrometria de massas CG/EM, an??lise de infravermelho acoplada a transformada de fourrier FT/IR, e an??lise de difra????o de raio-x DRX, que validaram nas fra????es de extratos em etanol e acetato a composi????o dos constituintes do g??nero principal de breu Protium Hepthaphyllum, os compostos pentacicl??cos de alfa e beta amirina e amironas. A estabilidade t??rmica dos extratos foi investigada atrav??s da an??lise termogravim??trica TGA, os compostos s??o constitu??dos de grupos OH, que resulta em uma forte liga????o intermolecular, em m??dia a estabilidade t??rmica norteia 250 ??C. Em meio aquoso os extratos resultaram na dispers??o s??lida hidrof??bica, em fun????o desta qualidade em testes de absor????o de ??gua avaliou-se as resinas de breu extra??das em etanol e acetato, que n??o apresentaram dispers??o quando comparadas a resina industrial. Quanto a prospec????o ao potencial impermeabilizante das resinas de breu avaliou-se ao despejala como revestimento de superf??cie em res??duos caro??os de a??a?? a fim de qualificar o potencial de impermeabiliza????o em meio ao severos ataques alcalinos promovidos durante a hidrata????o da massa ciment??cia, o melhor m??todo de impermeabiliza????o se deu para resina de breu aquecido, os corpos de provas que tiveram os caro??os agregados, impermeabilizados com a resina tiveram resist??ncia de 6,49 MPa, resistindo e inibindo severas condi????es de alcalinidade e carbonata????o da matriz ciment??cia. Para a produ????o de comp??sitos laminados, o uso da resina de breu extra??da ou aquecida n??o promoveu a prote????o das fibras em meio a matriz ciment??cia, bem como n??o promoveu a qualidade de resist??ncia. Quanto ao ensaio de flex??o o melhor ??ndice de resist??ncia se deu ao revestimento dos tecidos de juta e malva, impermeabilizado com a resina industrial que promoveu resist??ncia em m??dia de 7,87 (MPa). Palavras chaves: Breu branco da Amaz??nia; Caracteriza????o; Comp??sitos leves. Comp??sitos laminados.

Submitted by Fernanda Honorato (fernanda.honorato11@gmail.com) on 2020-01-07T18:30:06Z No. of bitstreams: 4 DISSERTA????O FERNANDA.pdf: 3524715 bytes, checksum: 9aa2deedb9636f29b5471c3e6ea49215 (MD5) Scan ATA.jpg: 407714 bytes, checksum: 3b47b875a1d33b066d7a303bbdabf1a2 (MD5) Scan.pdf: 333343 bytes, checksum: 7f66e67ef89c9e4aac939fb01ce2a691 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Approved for entry into archive by Engenharia Civil PPGEC (ppgec@ufam.edu.br) on 2020-01-13T15:10:25Z (GMT) No. of bitstreams: 4 DISSERTA????O FERNANDA.pdf: 3524715 bytes, checksum: 9aa2deedb9636f29b5471c3e6ea49215 (MD5) Scan ATA.jpg: 407714 bytes, checksum: 3b47b875a1d33b066d7a303bbdabf1a2 (MD5) Scan.pdf: 333343 bytes, checksum: 7f66e67ef89c9e4aac939fb01ce2a691 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Approved for entry into archive by Divis??o de Documenta????o/BC Biblioteca Central (ddbc@ufam.edu.br) on 2020-01-14T12:33:25Z (GMT) No. of bitstreams: 4 DISSERTA????O FERNANDA.pdf: 3524715 bytes, checksum: 9aa2deedb9636f29b5471c3e6ea49215 (MD5) Scan ATA.jpg: 407714 bytes, checksum: 3b47b875a1d33b066d7a303bbdabf1a2 (MD5) Scan.pdf: 333343 bytes, checksum: 7f66e67ef89c9e4aac939fb01ce2a691 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Made available in DSpace on 2020-01-14T12:33:25Z (GMT). No. of bitstreams: 4 DISSERTA????O FERNANDA.pdf: 3524715 bytes, checksum: 9aa2deedb9636f29b5471c3e6ea49215 (MD5) Scan ATA.jpg: 407714 bytes, checksum: 3b47b875a1d33b066d7a303bbdabf1a2 (MD5) Scan.pdf: 333343 bytes, checksum: 7f66e67ef89c9e4aac939fb01ce2a691 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2019-11-07 CAPES - Coordena????o de Aperfei??oamento de Pessoal de N??vel Superior Cellulose reinforced geopolymer matrix plates were produced and characterized. In the geopolymer composition, metakaolin produced from kaolin calcination, cement and silica were used together with potassium hydroxide as alkaline activator. For the characterization of these materials, the X ray diffraction (XRD), X ray fluorescence (FRX) and infrared spectroscopy (FTIR) tests were performed, as well as the cellulose water absorption test. The compression test in the geopolymer matrix was performed at the ages of 1, 3, 7 and 28 days to determine its strength and to determine the age to be performed the subsequent tests. The final resistance at 7 days was found to be equivalent to 76% of the resistance at 28 days, which corresponded to 40.44 MPa. Regarding the four-point flexion tests, the matrix presented similar behavior at the tested ages, presenting an average resistance of 1.95 MPa and 2.04 MPa at the ages of 7 and 14 days, respectively, and presenting a fragile fracture. The composite showed increased strength after first crack stress and great deflection. At the age of 7 days, a resistance of 3.13 MPa was obtained with a deflection of approximately 3 mm, while the age of 14 days had an average resistance of 4.02 MPa corresponding to about 21.95% increase with a deflection around 1.8 mm. The apparent density and water absorption of the matrix showed results of 1.66 g / cm?? and 18.45%, against 1.52 g / cm?? and 21.32% of the composite at 14 days. Placas com matriz geopolim??rica refor??adas com celulose foram produzidas e caracterizadas. Na composi????o do geopol??mero foram utilizados o metacaulim produzido a partir da calcina????o do caulim, o cimento e a s??lica juntamente com o hidr??xido de pot??ssio como ativador alcalino. Para a caracteriza????o desses materiais, foram realizados os ensaios de difra????o de raios X (DRX), fluoresc??ncia de raios X (FRX) e Espectroscopia de infravermelhos (FTIR) al??m do ensaio de absor????o de ??gua na celulose. O ensaio de compress??o na matriz geopolim??rica foi realizado com as idades de 1, 3, 7 e 28 dias para averigua????o de sua resist??ncia e determina????o da idade a serem realizados os ensaios posteriores. Verificou-se que a resist??ncia final aos 7 dias foi equivalente a 76% da resist??ncia aos 28 dias, que correspondeu a 40,44 MPa. Quanto aos ensaios de flex??o a quatro pontos, a matriz apresentou comportamento similar nas idades ensaiadas, apresentando uma resist??ncia m??dia de 1,95 MPa e 2,04 MPa nas idades de 7 e 14 dias, respectivamente, e apresentando fratura fr??gil. O comp??sito apresentou aumento de resist??ncia ap??s a tens??o de primeira fissura e grande deflex??o. Na idade de 7 dias, obteve-se uma resist??ncia de 3,13 MPa com uma deflex??o de aproximadamente 3 mm, enquanto a idade de 14 dias apresentou uma resist??ncia m??dia de 4,02 MPa correspondendo a cerca de 21,95% de aumento com uma deflex??o por volta de 1,8 mm. A densidade aparente e absor????o de ??gua da matriz apresentaram resultados de 1,66 g/cm?? e 18,45%, contra 1,52 g/cm?? e 21,32% do comp??sito, aos 14 dias.

Submitted by Michell Barros (engmichellbarros@gmail.com) on 2019-12-05T18:32:50Z No. of bitstreams: 3 ata defesa.pdf: 163356 bytes, checksum: 015adea2458b87efc9fb829c910a51d7 (MD5) DISSERTA????O - DESENVOLVIMENTO DE PAIN??IS SANDU??CHES COM N??CLEO DE EPS E PLACAS DE FACE CIMENTICIAS COMO SISTEMA DE TECNOLOGIA CONSTRUTIVA PARA CASAS POPULARES, EM MANAUS..pdf: 3780399 bytes, checksum: 8c2ca9c3ab17b948c527e614c823427e (MD5) Carta encaminhamento auto deposito.jpg: 3323274 bytes, checksum: 2f3d9bba1f45bee2a054c0a53b40b4f5 (MD5) Approved for entry into archive by Engenharia Civil PPGEC (ppgec@ufam.edu.br) on 2019-12-10T17:08:01Z (GMT) No. of bitstreams: 3 ata defesa.pdf: 163356 bytes, checksum: 015adea2458b87efc9fb829c910a51d7 (MD5) DISSERTA????O - DESENVOLVIMENTO DE PAIN??IS SANDU??CHES COM N??CLEO DE EPS E PLACAS DE FACE CIMENTICIAS COMO SISTEMA DE TECNOLOGIA CONSTRUTIVA PARA CASAS POPULARES, EM MANAUS..pdf: 3780399 bytes, checksum: 8c2ca9c3ab17b948c527e614c823427e (MD5) Carta encaminhamento auto deposito.jpg: 3323274 bytes, checksum: 2f3d9bba1f45bee2a054c0a53b40b4f5 (MD5) Rejected by Divis??o de Documenta????o/BC Biblioteca Central (ddbc@ufam.edu.br), reason: Melhorar a qualidade da resolu????o da ficha catalogr??fica. on 2019-12-10T19:19:05Z (GMT) Submitted by Michell Barros (engmichellbarros@gmail.com) on 2019-12-10T22:04:00Z No. of bitstreams: 3 ata defesa.pdf: 163356 bytes, checksum: 015adea2458b87efc9fb829c910a51d7 (MD5) Carta encaminhamento auto deposito.jpg: 3323274 bytes, checksum: 2f3d9bba1f45bee2a054c0a53b40b4f5 (MD5) DISSERTA????O - DESENVOLVIMENTO DE PAIN??IS SANDU??CHES COM N??CLEO DE EPS E PLACAS DE FACE CIMENTICIAS COMO SISTEMA DE TECNOLOGIA CONSTRUTIVA PARA CASAS POPULARES, EM MANAUS..pdf: 3801378 bytes, checksum: 46d88b2f8ccb4b6a02ae7e9d4192e596 (MD5) Approved for entry into archive by Engenharia Civil PPGEC (ppgec@ufam.edu.br) on 2020-01-02T19:14:31Z (GMT) No. of bitstreams: 3 ata defesa.pdf: 163356 bytes, checksum: 015adea2458b87efc9fb829c910a51d7 (MD5) Carta encaminhamento auto deposito.jpg: 3323274 bytes, checksum: 2f3d9bba1f45bee2a054c0a53b40b4f5 (MD5) DISSERTA????O - DESENVOLVIMENTO DE PAIN??IS SANDU??CHES COM N??CLEO DE EPS E PLACAS DE FACE CIMENTICIAS COMO SISTEMA DE TECNOLOGIA CONSTRUTIVA PARA CASAS POPULARES, EM MANAUS..pdf: 3801378 bytes, checksum: 46d88b2f8ccb4b6a02ae7e9d4192e596 (MD5) Approved for entry into archive by Divis??o de Documenta????o/BC Biblioteca Central (ddbc@ufam.edu.br) on 2020-01-03T14:10:36Z (GMT) No. of bitstreams: 3 ata defesa.pdf: 163356 bytes, checksum: 015adea2458b87efc9fb829c910a51d7 (MD5) Carta encaminhamento auto deposito.jpg: 3323274 bytes, checksum: 2f3d9bba1f45bee2a054c0a53b40b4f5 (MD5) DISSERTA????O - DESENVOLVIMENTO DE PAIN??IS SANDU??CHES COM N??CLEO DE EPS E PLACAS DE FACE CIMENTICIAS COMO SISTEMA DE TECNOLOGIA CONSTRUTIVA PARA CASAS POPULARES, EM MANAUS..pdf: 3801378 bytes, checksum: 46d88b2f8ccb4b6a02ae7e9d4192e596 (MD5) Made available in DSpace on 2020-01-03T14:10:36Z (GMT). No. of bitstreams: 3 ata defesa.pdf: 163356 bytes, checksum: 015adea2458b87efc9fb829c910a51d7 (MD5) Carta encaminhamento auto deposito.jpg: 3323274 bytes, checksum: 2f3d9bba1f45bee2a054c0a53b40b4f5 (MD5) DISSERTA????O - DESENVOLVIMENTO DE PAIN??IS SANDU??CHES COM N??CLEO DE EPS E PLACAS DE FACE CIMENTICIAS COMO SISTEMA DE TECNOLOGIA CONSTRUTIVA PARA CASAS POPULARES, EM MANAUS..pdf: 3801378 bytes, checksum: 46d88b2f8ccb4b6a02ae7e9d4192e596 (MD5) Previous issue date: 2019-10-09 The use of alternative materials in civil construction has become necessary to mitigate the environmental impacts caused by the sector and provide the use of lightweight materials, especially sandwich panels used in the implementation and construction of popular housing that meet housing programs and enable the creation of new vertical sealing construction systems adapted to the specificity of the Amazon region. The materials chosen to make the face plates were characterized and sought to meet the resistance standard NBR 15.498: 2016 aimed at the use of face plates, ASTM C393: 2016 for the panel and the performance standard NBR 15.575: 2013 that enabled the use of the cement sandwich panel (PSC) as a vertical sealing system in buildings. The research analyzed the physical and mechanical performance of cement sandwich panels (PSC) consisting of cement mortar face plates with partial replacement of 30% of cement by regional double layer jute fabric reinforced metakaolin and expanded polystyrene core (EPS) . The physical and mechanical properties evaluated by NBR 15.498: 2016 for faceplates and showed resistance of this component about 11 MPa and according to ASTM C393: 2016, the load supported by the sandwich panel was approximately 2000 N. Still according to performance standard 15.575: 2013 adopted for conducting thermal and acoustic comfort tests, the cementitious sandwich panel - PSC has been validated as a top level vertical sealing system with capacity for use in civil construction for the amazon region. A utiliza????o de materiais alternativos na constru????o civil tornou-se necess??rio para mitigar os impactos ambientais provocados pelo setor e proporcionar o emprego de materiais leves, principalmente pain??is sandu??ches utilizados na implanta????o e constru????o de habita????es populares que atendam aos programas habitacionais e que possibilitem a cria????o de novos sistemas construtivos de veda????o vertical adaptados a especificidade da regi??o amaz??nica. Os materiais escolhidos para confec????o das placas de face foram caracterizados e buscaram atender a norma de resist??ncia NBR 15.498:2016 voltada a utiliza????o das placas de face, a ASTM C393:2016 para o painel e a norma de desempenho NBR 15.575:2013 que viabilizou a utiliza????o do painel sandu??che ciment??cio (PSC) como sistema de veda????o vertical em edifica????es. A pesquisa analisou os desempenhos f??sicos e mec??nicos dos pain??is sandu??ches ciment??cios (PSC) constitu??dos de placas de face de argamassa ciment??cia com substitui????o parcial de 30% do cimento pelo metacaulim regional refor??ado com tecido juta em dupla camada, e n??cleo em poliestireno expandido (EPS). As propriedades f??sicas e mec??nicas avaliadas atrav??s da norma NBR 15.498:2016 para as placas de face e apresentaram resist??ncia deste componente acerca de 11 MPa e de acordo com ASTM C393:2016, a carga suportada pelo painel sandu??che foi de aproximadamente 2000 N. Ainda segundo a norma de desempenho 15.575:2013 adotada para realiza????o dos ensaios de conforto t??rmico e ac??stico, o painel sandu??che ciment??co ??? PSC foi validado como sistema de veda????o vertical de n??vel superior com capacidade de utiliza????o na constru????o civil para regi??o amaz??nica. Trabalho inovador sobre desenvolvimento de sistemas verticais de veda????o interna ou externa com utiliza????o de produtos regionais amaz??nicos.

Submitted by LILLIAN CARDOSO NASCIMENTO (cardosolillian@hotmail.com) on 2020-04-23T22:27:29Z No. of bitstreams: 4 Disserta????o de Mestrado- Lillian Versao Final Definitiva para deposito 23 04 20.pdf: 2433056 bytes, checksum: c861abf91b60127e708ac037bf0c556d (MD5) CartaEncaminhamentoDep??sito.pdf: 34406 bytes, checksum: d17a1e9b133d48a9b54d96860af9548d (MD5) Folha de aprova????o - Lillian Cardoso.pdf: 152273 bytes, checksum: 541c8fea7cf420196b7e5ec2e4269183 (MD5) Ata Defesa - Disserta????o - Lillian Cardoso.pdf: 241879 bytes, checksum: bd1a11b3390d33f9eb12177099543bfc (MD5) Approved for entry into archive by PPGGEO Geoci??ncias (ppggeo@ufam.edu.br) on 2020-04-24T00:04:42Z (GMT) No. of bitstreams: 4 Disserta????o de Mestrado- Lillian Versao Final Definitiva para deposito 23 04 20.pdf: 2433056 bytes, checksum: c861abf91b60127e708ac037bf0c556d (MD5) CartaEncaminhamentoDep??sito.pdf: 34406 bytes, checksum: d17a1e9b133d48a9b54d96860af9548d (MD5) Folha de aprova????o - Lillian Cardoso.pdf: 152273 bytes, checksum: 541c8fea7cf420196b7e5ec2e4269183 (MD5) Ata Defesa - Disserta????o - Lillian Cardoso.pdf: 241879 bytes, checksum: bd1a11b3390d33f9eb12177099543bfc (MD5) Rejected by Divis??o de Documenta????o/BC Biblioteca Central (ddbc@ufam.edu.br), reason: Corre????o da entrada para autoria na Ficha Catalogr??fica, onde se l?? "Cardoso Nascimento, Lillian", dever?? ser corrigido para Nascimento, Lillian Cardoso". on 2020-04-24T02:49:16Z (GMT) Submitted by LILLIAN CARDOSO NASCIMENTO (cardosolillian@hotmail.com) on 2020-04-24T14:00:11Z No. of bitstreams: 4 Disserta????o de Mestrado- Lillian Versao Final Definitiva para deposito 23 04 20.pdf: 2433056 bytes, checksum: c861abf91b60127e708ac037bf0c556d (MD5) CartaEncaminhamentoDep??sito.pdf: 34406 bytes, checksum: d17a1e9b133d48a9b54d96860af9548d (MD5) Folha de aprova????o - Lillian Cardoso.pdf: 152273 bytes, checksum: 541c8fea7cf420196b7e5ec2e4269183 (MD5) Ata Defesa - Disserta????o - Lillian Cardoso.pdf: 241879 bytes, checksum: bd1a11b3390d33f9eb12177099543bfc (MD5) Approved for entry into archive by PPGGEO Geoci??ncias (ppggeo@ufam.edu.br) on 2020-04-24T15:26:19Z (GMT) No. of bitstreams: 4 Disserta????o de Mestrado- Lillian Versao Final Definitiva para deposito 23 04 20.pdf: 2433056 bytes, checksum: c861abf91b60127e708ac037bf0c556d (MD5) CartaEncaminhamentoDep??sito.pdf: 34406 bytes, checksum: d17a1e9b133d48a9b54d96860af9548d (MD5) Folha de aprova????o - Lillian Cardoso.pdf: 152273 bytes, checksum: 541c8fea7cf420196b7e5ec2e4269183 (MD5) Ata Defesa - Disserta????o - Lillian Cardoso.pdf: 241879 bytes, checksum: bd1a11b3390d33f9eb12177099543bfc (MD5) Rejected by Divis??o de Documenta????o/BC Biblioteca Central (ddbc@ufam.edu.br), reason: Para aprova????o da Disserta????o ?? necess??ria a corre????o da entrada para autoria na Ficha Catalogr??fica, onde se l?? "Cardoso Nascimento, Lillian", dever?? ser alterada para Nascimento, Lillian Cardoso". on 2020-04-24T17:43:42Z (GMT) Submitted by LILLIAN CARDOSO NASCIMENTO (cardosolillian@hotmail.com) on 2020-05-07T02:52:54Z No. of bitstreams: 4 CartaEncaminhamentoDep??sito.pdf: 34406 bytes, checksum: d17a1e9b133d48a9b54d96860af9548d (MD5) Folha de aprova????o - Lillian Cardoso.pdf: 152273 bytes, checksum: 541c8fea7cf420196b7e5ec2e4269183 (MD5) Ata Defesa - Disserta????o - Lillian Cardoso.pdf: 241879 bytes, checksum: bd1a11b3390d33f9eb12177099543bfc (MD5) Disserta????o de Mestrado- Lillian Versao Final Definitiva para deposito 06 05 20.pdf: 2416470 bytes, checksum: be3db245f91c8589a0e7c9e72b9f3867 (MD5) Approved for entry into archive by PPGGEO Geoci??ncias (ppggeo@ufam.edu.br) on 2020-05-12T12:44:15Z (GMT) No. of bitstreams: 4 CartaEncaminhamentoDep??sito.pdf: 34406 bytes, checksum: d17a1e9b133d48a9b54d96860af9548d (MD5) Folha de aprova????o - Lillian Cardoso.pdf: 152273 bytes, checksum: 541c8fea7cf420196b7e5ec2e4269183 (MD5) Ata Defesa - Disserta????o - Lillian Cardoso.pdf: 241879 bytes, checksum: bd1a11b3390d33f9eb12177099543bfc (MD5) Disserta????o de Mestrado- Lillian Versao Final Definitiva para deposito 06 05 20.pdf: 2416470 bytes, checksum: be3db245f91c8589a0e7c9e72b9f3867 (MD5) Approved for entry into archive by Divis??o de Documenta????o/BC Biblioteca Central (ddbc@ufam.edu.br) on 2020-05-12T13:35:54Z (GMT) No. of bitstreams: 4 CartaEncaminhamentoDep??sito.pdf: 34406 bytes, checksum: d17a1e9b133d48a9b54d96860af9548d (MD5) Folha de aprova????o - Lillian Cardoso.pdf: 152273 bytes, checksum: 541c8fea7cf420196b7e5ec2e4269183 (MD5) Ata Defesa - Disserta????o - Lillian Cardoso.pdf: 241879 bytes, checksum: bd1a11b3390d33f9eb12177099543bfc (MD5) Disserta????o de Mestrado- Lillian Versao Final Definitiva para deposito 06 05 20.pdf: 2416470 bytes, checksum: be3db245f91c8589a0e7c9e72b9f3867 (MD5) Made available in DSpace on 2020-05-12T13:35:54Z (GMT). No. of bitstreams: 4 CartaEncaminhamentoDep??sito.pdf: 34406 bytes, checksum: d17a1e9b133d48a9b54d96860af9548d (MD5) Folha de aprova????o - Lillian Cardoso.pdf: 152273 bytes, checksum: 541c8fea7cf420196b7e5ec2e4269183 (MD5) Ata Defesa - Disserta????o - Lillian Cardoso.pdf: 241879 bytes, checksum: bd1a11b3390d33f9eb12177099543bfc (MD5) Disserta????o de Mestrado- Lillian Versao Final Definitiva para deposito 06 05 20.pdf: 2416470 bytes, checksum: be3db245f91c8589a0e7c9e72b9f3867 (MD5) Previous issue date: 2019-10-04 Coordena????o de Aperfei??oamento de Pessoal de N??vel Superior - CAPES In the region, kaolin deposits are of sedimentary origin and belong to the Alter do Ch??o Formation. These deposits, which have a significant amount of this raw material, where, to date, there is no company that conducts its exploration. Some of these outcrops are found in the municipalities of Manaus, Presidente Figueiredo and Rio Preto da Eva in Amazonas and are seen in road cuts and gullies. Kaolin combined with feldspar and quartz forms an optimal mixture for the manufacture of ceramic materials. These compounds, which can be replaced by waste. The objective of this work was to evaluate the potential of the ceramic mixture composed of kaolin, rock powders and glass for the production of ceramic materials, using the technique of experimental planning through the response surface. The raw materials (kaolin, rock powder and glass powder) were chemically characterized by X-ray fluorescence spectroscopy (FRX), X-ray diffractometry (XRD), particle size analysis (AG) techniques. The formulations containing the raw materials were formed by pressing at a pressure of 45MPa. After obtaining the specimens, they were sintered at temperatures of 950 ?? C, 1100 ?? C, 1200 ?? C and 1250 ?? C and, subsequently subjected to the following tests: water absorption (AA), linear burning retraction (RLq), three-point flexural rupture module (MRF) and scanning electron microscopy (SEM) analysis. The results showed that the compositions (masses) formulated from kaolin in natura, rock and glass powders can be used in the production of ceramic materials such as stoneware and semi-stoneware whose samples obtained good results after the sintering and testing process technological were: M80, M70 and M40 sintered at the following temperatures: 1250 ?? C, 1250 ?? C and 1200 ?? C respectively. Na regi??o, os dep??sitos de caulim s??o de origem sedimentar e pertencem ?? Forma????o Alter do Ch??o. Dep??sitos estes, que possuem uma quantidade significativa dessa mat??ria-prima, onde, at?? o momento, n??o existe nenhuma empresa que realiza a sua explora????o. Alguns destes afloramentos, s??o encontrados nos munic??pios de Manaus, Presidente Figueiredo e Rio Preto da Eva no Amazonas sendo visualizados em cortes de estradas e vo??orocas. O caulim combinado com feldspato e quartzo forma uma mistura ??tima para a fabrica????o de materiais cer??micos. Compostos estes, que podem ser substitu??dos por res??duos. O objetivo deste trabalho foi avaliar a potencialidade da mistura cer??mica composta de caulim, p??s de rocha e vidro para a produ????o de materiais cer??micos, utilizando a t??cnica de planejamento experimental por meio da superf??cie de resposta. As mat??rias primas (caulim, p?? de rocha e p?? de vidro) foram caracterizadas f??sico quimicamente por t??cnicas de espectroscopia de fluoresc??ncia de raios-X (FRX), difratometria de raios-X (DRX), an??lise granulom??trica (AG). As formula????es contendo as mat??rias primas foram conformadas por prensagem ?? uma press??o de 45MPa. Ap??s obter os corpos de provas, os mesmos foram sinterizados ?? temperaturas de 950??C, 1100??C, 1200??C e 1250??C e, posteriormente submetidos aos seguintes ensaios: absor????o de ??gua (AA),retra????o linear de queima (RLq), m??dulo de ruptura ?? flex??o em tr??s pontos (MRF) e an??lise de microscopia eletr??nica de varredura (MEV). Os resultados mostraram que as composi????es (massas) formuladas a partir de caulim in natura, p??s de rocha e vidro podem ser utilizadas na produ????o de materiais cer??micos do tipo gr??s e semi gr??s cuja as amostras que obtiveram bons resultados ap??s o processo de sinteriza????o e ensaios tecnol??gicos foram: M80, M70 e M40 sinterizadas nas seguintes temperaturas: 1250??C, 1250??C e 1200??C respectivamente.

Submitted by Ewerton Mazoni (ewerton.mazoni@gmail.com) on 2019-09-20T17:51:58Z No. of bitstreams: 2 1DISSERTA????O - EWERTON MARTINS MAZONI.pdf: 3426525 bytes, checksum: 821a611373624cf0ce04c163f96502de (MD5) 1Carta Encaminhamento Autodep??sito DISSERTA????O EWERTON MAZONI.pdf: 414129 bytes, checksum: b27affb73d50b44801e53ee2895373c1 (MD5) Approved for entry into archive by Engenharia Civil PPGEC (ppgec@ufam.edu.br) on 2019-09-23T16:44:06Z (GMT) No. of bitstreams: 2 1DISSERTA????O - EWERTON MARTINS MAZONI.pdf: 3426525 bytes, checksum: 821a611373624cf0ce04c163f96502de (MD5) 1Carta Encaminhamento Autodep??sito DISSERTA????O EWERTON MAZONI.pdf: 414129 bytes, checksum: b27affb73d50b44801e53ee2895373c1 (MD5) Approved for entry into archive by Divis??o de Documenta????o/BC Biblioteca Central (ddbc@ufam.edu.br) on 2019-09-23T19:38:21Z (GMT) No. of bitstreams: 2 1DISSERTA????O - EWERTON MARTINS MAZONI.pdf: 3426525 bytes, checksum: 821a611373624cf0ce04c163f96502de (MD5) 1Carta Encaminhamento Autodep??sito DISSERTA????O EWERTON MAZONI.pdf: 414129 bytes, checksum: b27affb73d50b44801e53ee2895373c1 (MD5) Made available in DSpace on 2019-09-23T19:38:21Z (GMT). No. of bitstreams: 2 1DISSERTA????O - EWERTON MARTINS MAZONI.pdf: 3426525 bytes, checksum: 821a611373624cf0ce04c163f96502de (MD5) 1Carta Encaminhamento Autodep??sito DISSERTA????O EWERTON MAZONI.pdf: 414129 bytes, checksum: b27affb73d50b44801e53ee2895373c1 (MD5) Previous issue date: 2019-08-09 FAPEAM - Funda????o de Amparo ?? Pesquisa do Estado do Amazonas The use of alternative materials in concrete for economy and sustainability, as well as the functionality of the composite for certain applications is constant today. From this context, the present research aims to study the lightweight concrete behavior with recycled expanded polystyrene (EPS), based on the physical and mechanical characterization of the same, for later use in civil construction applications. Then for this, initially a lightweight concrete was developed from the use of three size of EPS beads, 2.5 mm, 7 mm and recycled EPS, and in two distinct amounts (30 and 60%, in relation to the volume of concrete) in order to investigate the effect of these different materials in terms of compressive strength and density. For this, the experimental design was done using factorial design (2k) to analyze the influence of the type and amount of light aggregate on the results of compressive strength. After the initial comparative analysis, it was emphasized the characterization of the lightweight concrete using recycled EPS in three volumes (30%, 45% and 60%) and was analyzed physical parameters such as workability , density, water absorption, as well as mechanical parameters such as axial and diametral compressive strength. From the results obtained, it was observed that the increase of EPS in the mixtures reduced the workability, strength and density of the concrete and increased the water absorption in the two methodologies. In general, the impact caused by the transition in the EPS volume from 45% to 60% in the evaluated properties was more strong than in the transition from 30% to 45%. It should be noted that the use of EPS in concrete reduces the weight of the structural elements, structural or not sctructural, and the consumption of materials, reinforcing its great potential of application inside the civil construction. O uso de materiais alternativos em concretos visando a economia e a sustentabilidade, bem como a funcionalidade do comp??sito para determinadas aplica????es se faz constante nos dias atuais. A partir desse contexto, o presente trabalho tem como objetivo estudar o comportamento concreto leve com poliestireno expandido (EPS) reciclado, a partir da caracteriza????o f??sica e mec??nica do mesmo, para posterior utiliza????o em aplica????es dentro da constru????o civil. Dessa forma, inicialmente desenvolveu-se um concreto leve a partir da utiliza????o de tr??s tipos de EPS, p??rolas de 2,5 mm, p??rolas de 7 mm e EPS reciclado e, em duas quantidades distintas (30 e 60%, em rela????o ao volume de concreto), a fim de investigar o efeito causado por esses diferentes materiais em termos de resist??ncia ?? compress??o e massa espec??fica. Para isso, fez o delineamento experimental utilizando planejamento fatorial (2k) para analisar a influ??ncia do tipo e da quantidade de agregado leve nos resultados de resist??ncia ?? compress??o. Na sequ??ncia da pesquisa, ap??s a an??lise comparativa inicial, enfatizou-se no estudo de caracteriza????o do concreto leve utilizando o EPS reciclado, em tr??s volumes (30%, 45% e 60%), de tal modo que foi avaliado par??metros f??sicos como trabalhabilidade, massa espec??fica, absor????o de ??gua por imers??o e por capilaridade, como tamb??m par??metros mec??nicos, como resist??ncia ?? compress??o axial e diametral. Desse modo, pelos resultados encontrados, observou-se que o incremento de EPS nas misturas reduziu a trabalhabilidade, a resist??ncia e a massa espec??fica do concreto e aumentou a absor????o de ??gua nas duas metodologias realizadas. De modo geral, o impacto causado pela transi????o no volume de EPS de 45% para 60%, nas propriedades avaliadas, se deu de forma mais acentuada do que na transi????o do volume de 30% para 45%. Cabe salientar que a utiliza????o do EPS no concreto reduz o peso dos elementos construtivos, estruturais ou n??o, e o consumo dos materiais, refor??ando seu grande potencial de aplica????o dentro da constru????o civil. Nenhuma dificuldade.

Submitted by Ariel Lima (ariel.praia@hotmail.com) on 2020-08-25T05:21:28Z No. of bitstreams: 4 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Disserta????o Final com ata - Mestrado em Engenharia Civil - Ariel Praia.pdf: 19139344 bytes, checksum: a22c5b99d167ff4547cddf050af8bcb8 (MD5) Carta de encaminhamento de aluno para autosep??sito.pdf: 681385 bytes, checksum: 9df1b50973b2e4896523484557e2f97d (MD5) ata defesa.pdf: 867441 bytes, checksum: aaa1b3c5e7a1b43565f0306abda1e2f2 (MD5) Approved for entry into archive by PPGEC Engenharia Civil (ppgec@ufam.edu.br) on 2020-08-25T18:46:48Z (GMT) No. of bitstreams: 4 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Disserta????o Final com ata - Mestrado em Engenharia Civil - Ariel Praia.pdf: 19139344 bytes, checksum: a22c5b99d167ff4547cddf050af8bcb8 (MD5) Carta de encaminhamento de aluno para autosep??sito.pdf: 681385 bytes, checksum: 9df1b50973b2e4896523484557e2f97d (MD5) ata defesa.pdf: 867441 bytes, checksum: aaa1b3c5e7a1b43565f0306abda1e2f2 (MD5) Approved for entry into archive by Divis??o de Documenta????o/BC Biblioteca Central (ddbc@ufam.edu.br) on 2020-08-25T20:08:56Z (GMT) No. of bitstreams: 4 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Disserta????o Final com ata - Mestrado em Engenharia Civil - Ariel Praia.pdf: 19139344 bytes, checksum: a22c5b99d167ff4547cddf050af8bcb8 (MD5) Carta de encaminhamento de aluno para autosep??sito.pdf: 681385 bytes, checksum: 9df1b50973b2e4896523484557e2f97d (MD5) ata defesa.pdf: 867441 bytes, checksum: aaa1b3c5e7a1b43565f0306abda1e2f2 (MD5) Made available in DSpace on 2020-08-25T20:08:56Z (GMT). No. of bitstreams: 4 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Disserta????o Final com ata - Mestrado em Engenharia Civil - Ariel Praia.pdf: 19139344 bytes, checksum: a22c5b99d167ff4547cddf050af8bcb8 (MD5) Carta de encaminhamento de aluno para autosep??sito.pdf: 681385 bytes, checksum: 9df1b50973b2e4896523484557e2f97d (MD5) ata defesa.pdf: 867441 bytes, checksum: aaa1b3c5e7a1b43565f0306abda1e2f2 (MD5) Previous issue date: 2019-08-09 The paper presented aims to analyze parameters of undrained mechanical resistance (Su) in soft clay alluvial soils in the city of Rio Preto da Eva - AM, with emphasis on four specific tests, the Vane Shear Test, Standard Penetration Test (SPT), simple compressive strength and direct shear strength. The purpose of this paper is to determine the differences found in these four described methods and whether the vane test device produced meets the needs. In order to obtain such results, tests were performed in the aforementioned municipality, collection of undisturbed samples for laboratory analysis and production of low cost equipment to perform a reed test. The low cost equipment was designed to perform the type A test as described in NBR 10905/89 to avoid excessive dents in the soil studied. The characterization of the samples included the usual physical and chemical analysis through x-ray diffraction and ray fluorescence spectroscopy. By the end of the research it was possible to determine 2 m deep layers of soft to very soft clay on the river banks, and the values of cohesion and friction angle obtained in the tests were all within the standards described in the literature and by In the end the idealized equipment worked as expected and provided reliable results. A pesquisa apresentada visa analisar par??metros de resist??ncia mec??nica n??o drenada (Su) em solos aluvionares argilosos moles no munic??pio de Rio Preto da Eva ??? AM, com ??nfase em quatro ensaios espec??ficos, o Vane Shear Test (ensaio de palheta), Standard Penetration Test (SPT), resist??ncia ?? compress??o simples (RCS) e resist??ncia ao cisalhamento direto. O intuito do trabalho ?? determinar as diferen??as encontradas nestes quatro m??todos descritos e se o aparelho de vane test produzido serve as necessidades. Para a obten????o de tais resultados foram executados ensaios no munic??pio supracitado, coleta de amostras indeformdas para an??lise em laborat??rio e produ????o de equipamento de baixo custo para realizar ensaio de palheta. O equipamento de baixo custo foi idealizado para executar o ensaio tipo A como descrito na NBR 10905/89, para evitar amolgamentos excessivos no solo estudado. A caracteriza????o das amostras contemplou as an??lises f??sicas de praxe e qu??mica atrav??s da difra????o de raios-x (DRX) e espectroscopia de fluoresc??ncia de raios (FRX). Ao fim da pesquisa fora poss??vel determinar camadas com 2 m de profundidade de argilas em consist??ncia mole a muito mole nas margens do rio, sendo que os valores de coes??o e ??ngulo de atrito obtidos nos ensaios estavam todos dentro dos padr??es que a literatura descreve e por fim o equipamento idealizado funcionou como o esperado e proveu resultados confi??veis.

Submitted by Jorge Silva (jorgelmsilva@ufrrj.br) on 2022-01-26T18:51:07Z No. of bitstreams: 1 2019 - Amanda Nunes Assis dos Anjos.pdf: 1188100 bytes, checksum: 42064532825e852d6c0cc026cd240ad9 (MD5) Made available in DSpace on 2022-01-26T18:51:07Z (GMT). No. of bitstreams: 1 2019 - Amanda Nunes Assis dos Anjos.pdf: 1188100 bytes, checksum: 42064532825e852d6c0cc026cd240ad9 (MD5) Previous issue date: 2019-08-09 CNPq - Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico Conservation of excess fodder produced in the rainy season is a viable alternative to address the shortage of bulky food in the dry season. However, the low dry matter content, the low proportion of soluble carbohydrates and the high buffer capacity at the ideal cutting stage for silage impairs the fermentative activity, resulting in low quality silage. Thus, the use of technologies that aim to minimize the effects of these variables on the fermentative profile of silage is an alternative for the use of high productive capacity forages. Therefore, the general objective of this study was to evaluate the benefits obtained through the inclusion of pelletized citrus pulp associated or not to microbial inoculant in Massai grass silage, aiming to contribute to the knowledge of tropical grass silage processes, as well as the maintenance of conservation conditions of the said silages. A completely randomized design in a 2 X 4 factorial scheme (presence or absence of microbial inoculant x 10, 20 and 30% of pelletized citrus pulp) with five replications/treatment was used. The material was stored in PVC silos for 90 days. After this period, weighings were again performed to determine RMS and losses. After opening the silos, samples were collected for further analysis of ammonia nitrogen, pH and chemical composition. The addition of pelleted citrus pulp caused an increase in DM content of 28.45%, reduced gas losses and no effluent production, as well as high DM recovery rates. An interaction effect between microbial inoculant and citrus pulp was observed for EE and EB contents. Ammonia pH and N values remained within the range considered ideal for quality silage. Decreasing linear effect of the addition of citrus pulp on ADF (from 43.92 to 37.95%), NDF (from 74.45 to 59.65%), CEL (from 33.28 to 28.02) was observed. %) and HEMI (from 30.53 to 21.39%), but with a slight increase in IIG levels (5.28 to 6.31%). Contrary behavior was observed for CT contents, which showed increases of 0.05 percentage units for each 1% of added citrus pulp. For the CP contents the citrus pulp provided increases of 0.02 percentage units for each 1% inclusion of this additive, ranging from 4.85 to 5.69%. Regarding the NDIP contents, interaction effect was observed, with quadratic behavior for the presence and absence of microbial inoculant and minimum points equal to 15.88% and maximum 31.31% of citrus pulp, respectively. For ADIP values the inclusion of pelletized citrus pulp caused an increasing linear effect with increases of 0.13 percentage units for each 1% inclusion of this additive in Massai grass silage, ranging from 10.83 to 15.11%. There was no effect of the presence or absence of microbial inoculant or interaction between factors on protein and energy fractions. The energy fractions (A + B1, B2 and C) and nitrogen fractions B1 + B2 and C were influenced by the levels of citrus pulp inclusion, which was not observed in the other fractions A and B3 of the silages. The fractions A + B1 and C increased as a function of the inclusion levels of the citrus pulp, while the fraction B2 levels were reduced. It was also observed increase of the indigestible protein fraction (C). The energy fractions ranged from 32.12 to 42.97%; 54.93 to 41.31% and 12.95 to 15.72% for A + B1, B2 and C, respectively. While protein fractions ranged from 29.81 to 22.13% and 10.83 to 15.11% for B1 + B2 and C. Inclusions of 10 to 20% inclusion of pelletized citrus pulp based on natural matter Massai grass are sufficient to improve the fermentative parameters and carbohydrate and protein profiles of silages. A conserva??o do excedente de forragem produzida na esta??o chuvosa ? uma alternativa vi?vel para suprir a escassez de alimento volumoso no per?odo seco. Entretanto, o baixo teor de mat?ria seca, a baixa propor??o de carboidratos sol?veis e a alta capacidade tamp?o no est?dio ideal de corte para ensilagem prejudica a atividade fermentativa, resultando em silagens de baixa qualidade. Assim, o uso de tecnologias que visam minimizar os efeitos destas vari?veis sobre o perfil fermentativo da silagem ? uma alternativa para o uso de forrageiras de alta capacidade produtiva. Portanto, o objetivo geral deste estudo foi avaliar os benef?cios obtidos mediante a inclus?o de polpa c?trica peletizada associado ou n?o a inoculante microbiano na ensilagem de capim-Massai, visando contribuir para o conhecimento dos processos de ensilagem de gram?neas tropicais, bem como a manuten??o das condi??es de conserva??o das referidas silagens. Utilizou-se um delineamento inteiramente casualizado, em esquema fatorial 2 X 4 (presen?a ou aus?ncia do inoculante microbiano x 10, 20 e 30% de polpa c?trica peletizada), com cinco repeti??es/tratamento. O material foi acondicionado em silos de PVC por 90 dias. Decorrido esse per?odo foram realizadas novamente pesagens para determina??o da RMS e de perdas. Ap?s abertura dos silos, amostras foram coletadas para posteriores an?lises de nitrog?nio amoniacal, pH e composi??o qu?mico-bromatol?gica. A adi??o da polpa c?trica peletizada provocou aumento dos teores MS em 28,45%, reduziu as perdas por gases e n?o houve produ??o de efluente, al?m de altas taxas de recupera??o de MS. Foi observado efeito de intera??o entre o inoculante microbiano e a polpa c?trica para os teores de EE e EB. Os valores de pH e N-amoniacal se mantiveram dentro da faixa considerada ideal para silagens de qualidade. Foi observado efeito linear decrescente da adi??o de polpa c?trica sobre os teores da FDA (de 43,92 para 37,95%), FDN (de 74,45 para 59,65%), CEL (de 33,28 para 28,02%) e HEMI (de 30,53 para 21,39%), mas com pequeno aumento dos teores de LIG (5,28 para 6,31%). Comportamento contr?rio foi observado para os teores de CT, que apresentaram acr?scimos de 0,05 unidade percentual para cada 1% de polpa c?trica adicionada. Para os teores de PB a polpa c?trica proporcionou acr?scimos de 0,02 unidade percentual para cada 1% de inclus?o desse aditivo, com varia??o de 4,85 para 5,69%. Quanto aos teores de PIDN, observou-se efeito de intera??o, com comportamento quadr?tico para presen?a e aus?ncia do inoculante microbiano e, pontos de m?nimo igual a 15,88% e de m?xima igual a 31,34% de polpa c?trica, respectivamente. Para os valores de PIDA a inclus?o de polpa c?trica peletizada provocou efeito linear crescente com aumentos de 0,13 unidade percentual para cada 1% de inclus?o desse aditivo na ensilagem de capim-Massai, com varia??o de 10,83 a 15,11%. N?o foi observado efeito da presen?a ou aus?ncia do inoculante microbiano nem de intera??o entre os fatores sobre as fra??es proteicas e energ?ticas. As fra??es de energ?ticas (A + B1, B2 e C) e as fra??es nitrogenadas B1 + B2 e C foram influenciadas pelos n?veis de inclus?o de polpa c?trica, o que n?o foi observado nas demais fra??es A e B3 das silagens. As fra??es A + B1 e C aumentaram em fun??o dos n?veis de inclus?o da polpa c?trica, enquanto os teores da fra??o B2 foram reduzidas. Tamb?m foi observado aumento dos teores da fra??o prot?ica indigest?vel (C). As fra??es de energ?ticas variaram de 32,12 a 42,97%; 54,93 a 41,31% e 12,95 a 15,72% para A + B1, B2 e C, respectivamente. Enquanto as fra??es proteicas variaram de 29,81 a 22,13% e 10,83 e 15,11%, para B1 + B2 e C. As inclus?es de 10 a 20% de inclus?o de polpa c?trica peletizada, com base na m?teria natural do capim-Massai, s?o suficientes para melhorarem os par?metros fermentativos e perfis de carboidratos e prote?nas das silagens.

Submitted by Jorge Silva (jorgelmsilva@ufrrj.br) on 2022-01-31T05:58:11Z No. of bitstreams: 1 2019 - Carlos Renato Viegas.pdf: 2869461 bytes, checksum: 850940ce4cce315cabf90eda818e2327 (MD5) Made available in DSpace on 2022-01-31T05:58:11Z (GMT). No. of bitstreams: 1 2019 - Carlos Renato Viegas.pdf: 2869461 bytes, checksum: 850940ce4cce315cabf90eda818e2327 (MD5) Previous issue date: 2019-07-29 CAPES - Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior CNPq - Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico Brazil is one of the main beef producing countries, with the largest commercial herd. However, their productivity rates are still low compared to other countries, so to meet the expectations of the population demand for meat products, practices that improve performance such as the use of nutritional additives become indispensable for the development of beef cattle. with shorter production cycle. In this context, the objective of this work was to evaluate the performance, carcass characteristics and meat quality of bulls using the different additives (Flavomycin; Salinomycin; Virginiamycin) in their supplementation. The project was approved by the Animal Use Ethics Committee of the Universidade Federal Rural do Rio de Janeiro under protocol number 23083.010360 / 2016-18. Twenty-four Nellore bulls with average initial body weight (BW) of 303 kg were used. During the rearing phase, protein/energy supplement supplied in the amount 3 g / kg body weight / animal was used in the four treatments as proposed below: T1 - Control treatment (supplementation without the addition of additive); T2 - Supplementation + Flavomycin (40 mg / animal / day); T3 - Supplementation + Virginiamycin (45mg / 100kg BW) and T4 - Supplementation + Salinomycin (120mg / animal / day). Twelve Massai grass paddocks (three per treatment) managed in a continuous stocking system lasting 92 days during the dry season (May to August) were used. After reaching 355 kg BW the animals entered the finishing phase, when they were allocated in individual stalls receiving the additives from the previous phase and using sugarcane silage in a roughage: concentrate 30:70 ratio. The animals were evaluated every 28 days for their performance and dry matter intake. When they reached the average weight of 510 kg they were slaughtered in a commercial refrigerator. Subsequently, carcass yield and daily carcass gain were measured. The carcasses were transferred to cold room at a temperature of 1 ? C, and remained for 24 hours. Then, the Longissimus lumborum muscle was removed to measure the meat qualitative parameters: pH, temperature, color, cooking weight loss, shear force and centesimal composition. A completely randomized design with four treatments and three replications in the rearing phase was adopted, each pair of animal per paddock was considered an experimental unit, at the end the animals were confined individually and each animal was considered an experimental unit, totaling six replications per animal. treatment. An analysis of variance was applied, with significance, the test for comparison of means was applied using the Tukey test. The use of flavomycin, virginiamycin or salinomycin for Nellore cattle resulted in similar growth performance, carcass characteristics and meat quality. No evidence of benefit to rearing and finishing animals has been observed to support the use of additives at the doses used. O Brasil ? um dos principais pa?ses produtores de carne bovina, apresentando o maior rebanho comercial. Entretanto, seus ?ndices de produtividade ainda s?o baixos em compara??o com outros pa?ses, assim para atender as expectativas de demanda da popula??o por produtos c?rneos, pr?ticas que melhoram o desempenho como a utiliza??o de aditivos nutricionais se tornam indispens?veis para o desenvolvimento de uma bovinocultura de corte com menor ciclo de produ??o. Neste contexto, o objetivo deste trabalho foi avaliar o desempenho, caracter?sticas da carca?a e qualidade da carne de tourinhos, com a utiliza??o dos diferentes aditivos (Flavomicina; Salinomicina; Virginiamicina) na sua suplementa??o. O projeto foi aprovado pela Comiss?o de ?tica no Uso de Animais da Universidade Federal Rural do Rio de Janeiro com o n?mero de protocolo 23083.010360/2016-18. Foram utilizados vinte e quatro tourinhos Nelore com peso corporal (PC) inicial m?dio de 303 kg. Durante a fase de recria foi utilizado suplemento proteico/energ?tico fornecido na quantidade 3 g/kg peso vivo/animal, nos quatro tratamentos conforme os propostos a seguir: T1 ? Tratamento controle (suplementa??o sem a inclus?o de aditivo); T2 ? Suplementa??o + Flavomicina (40 mg/animal/dia); T3 - Suplementa??o + Virginiamicina (45mg/100kg PV) e T4 ? Suplementa??o + Salinomicina (120 mg/animal/dia). Foram utilizados doze piquetes com capim-Massai (tr?s por tratamento) manejados em sistema de lota??o cont?nua com dura??o de 92 dias no per?odo das secas (maio a agosto). Ap?s atingirem 355 kg de PC os animais entraram na fase de termina??o, quando foram alocados em baias individuais recebendo os aditivos da fase anterior e utilizando como volumoso a silagem de cana-de-a??car numa propor??o de volumoso: concentrado 30:70. Os animais foram avaliados a cada 28 dias em rela??o ao seu desempenho e consumo de mat?ria seca. Ao atingirem o peso m?dio de 510 kg os mesmos foram abatidos em frigorifico comercial. Posteriormente foi mensurado o rendimento de carca?a e o ganho de carca?a di?rio. As carca?as foram transferidas para c?mera fria ? temperatura de 1? C, e permaneceram por 24 horas. Em seguida foi retirado o m?sculo Longissimus lumborum para mensura??o dos par?metros qualitativos da carne: pH, temperatura, cor, perda de peso por coc??o, for?a de cisalhamento e composi??o centesimal. Foi adotado o delineamento inteiramente casualizado, com quatro tratamentos e tr?s repeti??es na fase de recria, cada dupla de animal por piquete foi considerado uma unidade experimental, na termina??o os animais foram confinados individualmente e cada animal foi considerado uma unidade experimental, totalizando seis repeti??es por tratamento. Foi aplicada an?lise de vari?ncia, havendo signific?ncia, aplicou-se o teste para a compara??o de m?dias utilizando o teste de Tukey. A utiliza??o de flavomicina, virginiamicina ou salinomicina para bovinos Nelore resultaram em desempenho de crescimento, caracter?sticas de carca?a e qualidade de carne semelhantes. Nenhuma evid?ncia de benef?cios para os animais em recria e termina??o foi observado para apoiar a utiliza??o dos aditivos nas doses utilizadas.

Submitted by Celso Magalhaes (celsomagalhaes@ufrrj.br) on 2022-06-21T14:39:32Z No. of bitstreams: 1 2019 - Guilherme Alves do Val.pdf: 670814 bytes, checksum: 80bd8b00bc895c996d3dbd82d4fef869 (MD5) Made available in DSpace on 2022-06-21T14:39:32Z (GMT). No. of bitstreams: 1 2019 - Guilherme Alves do Val.pdf: 670814 bytes, checksum: 80bd8b00bc895c996d3dbd82d4fef869 (MD5) Previous issue date: 2019-07-25 CAPES - Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior The aims of study were to evaluate the product behavior and bromatological composition of Tithonia diversifolia managed at different residue heights. The experiment was conducted at the Animal Science Institute of UFRRJ, in Serop?dica-RJ. Prior preparation of the experimental area was carried out 60 days before planting. The planting was carried out with 30 cm long cuttings in experimental areas arranged in three completely randomized blocks. The blocks were divided into eight 4.0 x 3.5 m plots, totaling 56 m? per block, where four blocks (residue heights): 20, 40, 60 and 80 cm were allocated. Evaluations were performed every 57 days, where heights (H), green (GMP) and dry (DMP) forage mass production per cut were measured, as well as forage mass accumulation green (GMA) and dry (DMA). Growth rate (GR) and leaf-stem ratio (LAR) were calculated. Determine dry matter (DM), crude protein (CP), mineral matter (MM), ethereal extract (EE), gross energy (GE), neutral detergent fiber (NDF) and acid (NDA), lignin (LIG), protein fraction. Calculate as carbohydrate fractions, total digestible nutrients (TDN), digestible energy (DE), metabolizable production energy (MEP) and net energy of lactation (NEL). The experimental design was completely randomized blocks in a split plot scheme. Treatments were evaluated by regression. Data were analyzed with homogeneity, normality and ANOVA, with 5% significance, using the R statistical software. The GMP had quadratic effect in November, with values of 10.91 Mg / ha at 18.33 cm. of residue height. Regrowth time was the cause of quadratic behavior, as well as climatic and management conditions. The DM content in September was quadratic, with values of 23.26% DM at 46.25 cm. The DM content was influenced by the period, with low rainfall and temperature climatic conditions, resulting in lower turgor of plant cells. The CP content was quadratic for September, with 21.83% CP for a height of 65 cm of residue. In September, when the plants were less tall, the thin and less lignified above 20 cm. An NDF in November was significant for the quadratic equation, with a height of 17.74 cm and a content of 61.15%. This month the plants were harvested at 61 days of regrowth in a dry-water transition period. The LIG was quadratic for the months of November, December and April, with values of 7.20% at 35 cm; 3.48% at 45 cm and 2.45% at 55.71 cm, respectively. These standards were marked by weather conditions, in addition to the regrowth time, being 61, 46 and 63 days, respectively for November, December and February. Note that residue heights of 40 to 50 cm are the most suitable range for Tithonia diversifolia O objetivo do presente estudo foi avaliar o comportamento produtivo e a composi??o bromatol?gica da Tithonia diversifolia manejada em diferentes alturas de res?duo. O experimento foi conduzido no Instituto de Zootecnia da UFRRJ, em Serop?dica-RJ. Foi realizado preparo pr?vio da ?rea experimental 60 dias antes do plantio. O plantio foi realizado com estacas de 30 cm de comprimento em ?reas experimentais dispostas em seis blocos completamente casualizados. Os blocos foram divididos em quatro parcelas de 4,0 x 3,5 m, totalizando 56 m? por bloco, onde foram alocados quatro tratamentos (alturas de res?duo): 20, 40, 60 e 80 cm. As avalia??es foram realizadas a cada 57 dias, onde realizou-se a mensura??o das alturas das plantas (H), estimativas de produ??o de massa de forragem verde (PMV) e seca (PMS) por corte, bem como o ac?mulo de massa de forragem verde (AMV) e seca (AMS). Foram calculadas taxa de crescimento (TC) e rela??o folha:haste (RFH). Determinou-se mat?ria seca (MS), prote?na bruta (PB), mat?ria mineral (MM), extrato et?reo (EE), energia bruta (EB), fibra em detergente neutro (FDN) e ?cido (FDA), lignina (LIG), fracionamento de prote?na. Calculou-se as fra??es de carboidratos, nutrientes digest?veis totais (NDT), energia digest?vel (ED), energia metaboliz?vel de produ??o (EMP) e energia l?quida de lacta??o (ELL). O delineamento experimental foi em blocos completamente casualizados em esquema de parcelas subdivididas. Os tratamentos foram avaliados atrav?s de regress?o. Os dados foram submetidos a an?lise de homogeneidade, normalidade e ANOVA, ? 5% de signific?ncia, atrav?s do software estat?stico R. A PMV teve efeito quadr?tico em novembro, com valores de 10,91 Mg/ha a 18,33 cm de altura de res?duo. O tempo de rebrota foi a causa para este comportamento quadr?tico, bem como as condi??es clim?ticas e de manejo. O teor de MS, em setembro, foi quadr?tico, com valores de 23,26% de MS a 46,25 cm. O teor de MS foi influenciado pelo per?odo, com condi??es clim?ticas de baixa pluviosidade e temperatura, resultando em menor turgor das c?lulas vegetais. O teor de PB foi quadr?tico para o m?s de setembro, com 21,83% PB para a altura de 65 cm de res?duo. Em setembro as plantas estavam com menor altura, hastes finas e menos lignificadas na por??o acima de 20 cm de altura. A FDN, em novembro, foi significativa para a equa??o quadr?tica, com altura de 17,74 cm e teor de 61,15%. Neste m?s as plantas foram colhidas aos 61 dias de rebrota em um per?odo de transi??o ?guas-secas. A LIG foi quadr?tica para os meses de novembro, dezembro e abril, com valores de 7,20% a 35 cm; 3,48% a 45 cm e 2,45% a 55,71 cm, respectivamente. Estas avalia??es foram marcadas por condi??es clim?ticas, al?m do tempo de rebrota, sendo 61, 46 e 63 dias, respectivamente para novembro, dezembro e fevereiro. Observou-se que alturas de res?duo de 40 a 50 cm ? o intervalo mais adequada ? Tithonia diversifolia. Estes valores proporcionaram as melhores associa??es entre produtividade, teores de MS, PB, FDN, LIG, fra??es A+B1, B2 e C, dos carboidratos, e as fra??es proteicas A e B1+B2

Submitted by ANA MENDES (mendes.anapaula7@gmail.com) on 2019-08-15T17:13:24Z No. of bitstreams: 4 Disserta????o - Ana Paula de Lima Mendes.pdf: 4727791 bytes, checksum: 6bca3c3b4d983a7388445b4f9da2dc5a (MD5) CARTA DE ENCAMINHAMENTO.pdf: 250718 bytes, checksum: 8ac84bb3abd420744b8a4884a56d8033 (MD5) ATA DE DEFESA.pdf: 837772 bytes, checksum: e682e147b582232a31ec556d674d99df (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Approved for entry into archive by Engenharia Civil PPGEC (ppgec@ufam.edu.br) on 2019-08-23T13:34:14Z (GMT) No. of bitstreams: 4 Disserta????o - Ana Paula de Lima Mendes.pdf: 4727791 bytes, checksum: 6bca3c3b4d983a7388445b4f9da2dc5a (MD5) CARTA DE ENCAMINHAMENTO.pdf: 250718 bytes, checksum: 8ac84bb3abd420744b8a4884a56d8033 (MD5) ATA DE DEFESA.pdf: 837772 bytes, checksum: e682e147b582232a31ec556d674d99df (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Approved for entry into archive by Divis??o de Documenta????o/BC Biblioteca Central (ddbc@ufam.edu.br) on 2019-08-23T19:31:47Z (GMT) No. of bitstreams: 4 Disserta????o - Ana Paula de Lima Mendes.pdf: 4727791 bytes, checksum: 6bca3c3b4d983a7388445b4f9da2dc5a (MD5) CARTA DE ENCAMINHAMENTO.pdf: 250718 bytes, checksum: 8ac84bb3abd420744b8a4884a56d8033 (MD5) ATA DE DEFESA.pdf: 837772 bytes, checksum: e682e147b582232a31ec556d674d99df (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Made available in DSpace on 2019-08-23T19:31:47Z (GMT). No. of bitstreams: 4 Disserta????o - Ana Paula de Lima Mendes.pdf: 4727791 bytes, checksum: 6bca3c3b4d983a7388445b4f9da2dc5a (MD5) CARTA DE ENCAMINHAMENTO.pdf: 250718 bytes, checksum: 8ac84bb3abd420744b8a4884a56d8033 (MD5) ATA DE DEFESA.pdf: 837772 bytes, checksum: e682e147b582232a31ec556d674d99df (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2019-07-19 FAPEAM - Funda????o de Amparo ?? Pesquisa do Estado do Amazonas This research presents the development and physical-mechanical characterization of cement-based composites reinforced with polypropylene, jute and mallow fibers. In order to increase the durability of plant fibers in composites, a matrix was developed with partial replacement of Portland cement by 50% of metakaolin to decrease calcium hydroxide levels, which degrade these fibers. The fibers were characterized in terms of their mineralogical composition and morphology by X-ray diffraction (XRD), thermogravimetry (TG / DTG), scanning electron microscopy (SEM), water absorption test. The matrix was characterized by physical tests (TG / DTG and rheology) and the characterized composites passed mechanical (compression and flexural tensile) and physical (dimensional variation and water absorption) tests. It was verified from the SEM tests that the polypropylene fiber has a standard morphology, while the natural fibers presented a structure of fibrocells, lumens and medium lamella. TG / DTG results showed that partial cement replacement decreased calcium hydroxide content by 100%. Metakaolin matrices had gains of up to 47,61% in flexural tensile strength in relation to the reference matrix (R). As for the flexural tensile behavior, the fiber matrices had an increase of up to 22.03%, compared to R. The dimensional variation tests confirmed the viability of the use of plant fibers and metakaolin as a solution to combat the problems of shrinkage in self-leveling floor mortars. A presente pesquisa apresenta o desenvolvimento e caracteriza????o f??sico-mec??nica de comp??sitos ciment??cios refor??ados com fibras de polipropileno, de juta e de malva. Com o objetivo de aumentar a durabilidade das fibras vegetais nos comp??sitos, foi desenvolvida uma matriz com substitui????o parcial do cimento Portland por 50% de metacaulinita, a fim de diminuir os n??veis de hidr??xido de c??lcio, que degradam essas fibras. As fibras foram caracterizadas quanto a sua composi????o mineral??gica e sua morfologia por difra????o de raios-X (DRX), termogravimetria (TG/DTG), microscopia eletr??nica de varredura (MEV), sendo que as fibras vegetais receberam tratamento alcalino e em seguida passaram por ensaio de absor????o de ??gua A matriz foi caraterizada por ensaios f??sicos (TG/DTG e reologia) e os comp??sitos caracterizados passaram por ensaios mec??nicos (compress??o e tra????o na flex??o) e f??sicos (varia????o dimensional e absor????o de ??gua). Foi verificado a partir dos ensaios de MEV que a fibra de polipropileno apresenta uma morfologia padr??o, enquanto as fibras naturais apresentaram uma estrutura de fibroc??lulas, l??mens e lamelas m??dias. Os resultados de TG/DTG comprovaram que a substitui????o parcial do cimento diminuiu em 100% o teor de hidr??xido de c??lcio. As matrizes com metacaulinita tiveram ganhos de at?? 47,61% na resist??ncia a tra????o na flex??o em rela????o a matriz refer??ncia (R). Quanto ao comportamento a tra????o na flex??o, as matrizes com fibras tiveram aumento de at?? 22,03%, em rela????o a R. Os ensaios de varia????o dimensional confirmaram a viabilidade do uso de fibras vegetais e da metacaulinita como uma solu????o ao combate a problemas de retra????o em argamassas autonivelantes para piso.

Submitted by Daniela Lima (danilima20.engcivil@gmail.com) on 2019-08-06T16:13:40Z No. of bitstreams: 4 Disserta????o_Final_2019.pdf: 4647509 bytes, checksum: 5189eb6cc1b39abf78b5f81b913b24ec (MD5) ata_1.pdf: 377452 bytes, checksum: f1d406bc14633c649162f3cd261419db (MD5) Carta de encaminhamento para autodep??sito.pdf: 216830 bytes, checksum: c82769ba5cca904446e493b09d2caefe (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Approved for entry into archive by Engenharia Civil PPGEC (ppgec@ufam.edu.br) on 2019-08-06T20:58:37Z (GMT) No. of bitstreams: 4 Disserta????o_Final_2019.pdf: 4647509 bytes, checksum: 5189eb6cc1b39abf78b5f81b913b24ec (MD5) ata_1.pdf: 377452 bytes, checksum: f1d406bc14633c649162f3cd261419db (MD5) Carta de encaminhamento para autodep??sito.pdf: 216830 bytes, checksum: c82769ba5cca904446e493b09d2caefe (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Approved for entry into archive by Divis??o de Documenta????o/BC Biblioteca Central (ddbc@ufam.edu.br) on 2019-08-08T14:48:18Z (GMT) No. of bitstreams: 4 Disserta????o_Final_2019.pdf: 4647509 bytes, checksum: 5189eb6cc1b39abf78b5f81b913b24ec (MD5) ata_1.pdf: 377452 bytes, checksum: f1d406bc14633c649162f3cd261419db (MD5) Carta de encaminhamento para autodep??sito.pdf: 216830 bytes, checksum: c82769ba5cca904446e493b09d2caefe (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Made available in DSpace on 2019-08-08T14:48:18Z (GMT). No. of bitstreams: 4 Disserta????o_Final_2019.pdf: 4647509 bytes, checksum: 5189eb6cc1b39abf78b5f81b913b24ec (MD5) ata_1.pdf: 377452 bytes, checksum: f1d406bc14633c649162f3cd261419db (MD5) Carta de encaminhamento para autodep??sito.pdf: 216830 bytes, checksum: c82769ba5cca904446e493b09d2caefe (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2019-07-18 FAPEAM - Funda????o de Amparo ?? Pesquisa do Estado do Amazonas In the present study the development and characterization of cementitious composites reinforced with cotton textile fabric was carried out. The composites were produced from cementitious matrix, constituted by cement CP II E-32, metakaolin, sand, water and superplasticizer, trace 1: 1: 0.4. The cementitious matrix was made with partial Portland cement by 50% of metakaolin with the proposition to reduce the quantity of calcium hydroxide. The textile fabric was characterized by water absorption, X-ray diffraction (XRD), thermogravimetry (TG) and scanning electron microscopy (SEM) tests. The cementitious laminates produced were reinforced with cotton fabric with volumetric fractions of 2, 3, 4 and 6%, they were evaluated at 28 days by means of physical and mechanical tests. For most of the experimental conditions, the composites presented a ???strain hardening??? behavior, with formation of multiple cracking, with increase in the strength, deformation and tenacity, as the fiber content increased. The composite with a 6% fiber content presented the maximum tensile stress of 7.26 MPa, with on average 23 cracks in the middle third of the sample, and about 5.86 MPa with averge of 57 cracks, subjetcted to flexural and tensile loads, respectively. Analyzing the results, it was concluded that the fiber used presents a potential use as reinforcement of cementitious laminates, forming composites with good physico-mechanical properties. No presente estudo realizou-se o desenvolvimento e a caracteriza????o de comp??sitos ciment??cios refor??ados com tecido t??xtil de algod??o. Os comp??sitos foram produzidos a partir de matriz ciment??cia, constitu??da por cimento CP II E-32, metacaulinita, areia, ??gua e superplastificante, tra??o 1:1:0,4. A matriz ciment??cia foi dosada com substitui????o parcial de cimento Portland por 50% de metacaulinita com a finalidade de reduzir a quantidade de hidr??xido de c??lcio. O tecido foi caracterizado atrav??s de ensaios de absor????o de ??gua, difra????o de raios-X (DRX), termogravimetria (TG) e microscopia eletr??nica de varredura (MEV). Os laminados ciment??cios produzidos foram refor??ados com tecido de algod??o com fra????es volum??tricas de 2, 3, 4 e 6%, sendo avaliados aos 28 dias por meio de ensaios f??sicos e mec??nicos. Para a maioria das condi????es experimentais os comp??sitos apresentaram comportamento ???strain hardening???, com forma????o de m??ltiplas fissuras, havendo incremento na resist??ncia, deforma????o e tenacidade, ?? medida que foi aumentado o teor de fibra. O Comp??sito com teor de 6% de fibra resistiu a tens??o m??xima de ruptura de 7,26 MPa, apresentando em m??dia 23 fissuras no ter??o m??dio da amostra, e cerca de 5,86 MPa com m??dia de 57 de fissuras, submetidos a cargas de flex??o e tra????o, respectivamente. Analisando os resultados, conclui-se que a fibra utilizada apresenta um potencial uso como refor??o de laminados ciment??cios, formando comp??sitos com boas propriedades f??sico-mec??nicas.

Submitted by ROSINALDO APARICIO (rabelo.aparicio@gmail.com) on 2019-07-15T17:21:57Z No. of bitstreams: 3 Disserta????o - Aparicio[11Julho].pdf: 2561787 bytes, checksum: 370114c585f54366cde32e0542564c39 (MD5) autodeposito_1 (1).pdf: 748509 bytes, checksum: 1d4277107320f9b981389bb8b0266369 (MD5) Novo Documento(2).pdf: 1404837 bytes, checksum: e4fab840307ecf5008eaef869212eb17 (MD5) Approved for entry into archive by PPGCEM Ci??ncia e Engenharia de Materiais (ppgcem@ufam.edu.br) on 2019-07-16T13:44:11Z (GMT) No. of bitstreams: 3 Disserta????o - Aparicio[11Julho].pdf: 2561787 bytes, checksum: 370114c585f54366cde32e0542564c39 (MD5) autodeposito_1 (1).pdf: 748509 bytes, checksum: 1d4277107320f9b981389bb8b0266369 (MD5) Novo Documento(2).pdf: 1404837 bytes, checksum: e4fab840307ecf5008eaef869212eb17 (MD5) Approved for entry into archive by Divis??o de Documenta????o/BC Biblioteca Central (ddbc@ufam.edu.br) on 2019-07-18T15:54:30Z (GMT) No. of bitstreams: 3 Disserta????o - Aparicio[11Julho].pdf: 2561787 bytes, checksum: 370114c585f54366cde32e0542564c39 (MD5) autodeposito_1 (1).pdf: 748509 bytes, checksum: 1d4277107320f9b981389bb8b0266369 (MD5) Novo Documento(2).pdf: 1404837 bytes, checksum: e4fab840307ecf5008eaef869212eb17 (MD5) Made available in DSpace on 2019-07-18T15:54:30Z (GMT). No. of bitstreams: 3 Disserta????o - Aparicio[11Julho].pdf: 2561787 bytes, checksum: 370114c585f54366cde32e0542564c39 (MD5) autodeposito_1 (1).pdf: 748509 bytes, checksum: 1d4277107320f9b981389bb8b0266369 (MD5) Novo Documento(2).pdf: 1404837 bytes, checksum: e4fab840307ecf5008eaef869212eb17 (MD5) Previous issue date: 2019-07-10 The massive growth of waste generation has stimulated the demand for the production of environmentally friendly materials, focusing on the use of waste and renewable materials. Meeting these needs, the production of composite materials reinforced with vegetable fibers has been widely studied and applied in recent decades. In this context, this work proposes the production and characterization of composites with residue of piassava fibers from the Amazon, originating from a brooms company and treated with alkaline and polyurethane solution derived from castor oil with variations in the proportion of Prepolymer. High fiber content (85 wt%) were used with the variation in the proportions of polyurethane prepolymer. Untreated and treated piassava fibers were chemically characterized by FTIR, TGA / DTG and DSC. The percentage of prepolymer isocyanates and the hydroxyl number of the polyol were characterized and TGA / DTG-DSC and FTIR were performed along with the prepolymer-modified resins. The composites were characterized for their density, thickness swelling, FTIR, TGA / DTG, DSC, flexural strength, water absorption and SEM (surface and fracture region). The treatment of the fibers of piassava provided a reduction in the percentage of hemicellulose, as already expected, in order to improve the surface for adhesion with the matrix. Results from the prepolymer variation study showed that the increase in the prepolymer ratio caused displacement at the degradation temperature peaks, decreasing the thermal stability according to the isocyanate increase (NCO). FTIR analysis showed that the excess amount of prepolymer (PP) in the mixture generated an unreacted isocyanate residue after formation of the polyurethane. Regarding the characterization of the composites by flexural strength, higher resistance was observed with increasing PP ratio. The results of swelling, moisture and flexion showed expected values, which are within the standard. In general, the CP2 and CP3 composites presented promising results for applications in dry conditions, considering the large amount of material from a renewable source, which tends to favor water absorption. O crescimento massivo da gera????o de res??duos tem estimulado a demanda para produ????o de materiais ecologicamente corretos, com foco na utiliza????o de res??duos e materiais renov??veis. Ao encontro dessas necessidades, a produ????o de materiais comp??sitos refor??ados com fibras vegetais vem sendo bastante estudados e aplicados nas ??ltimas d??cadas. Neste contexto, o trabalho prop??e a produ????o e caracteriza????o de comp??sitos com res??duo de fibras de pia??ava da Amaz??nia, oriunda de empresa de vassouras e tratada com solu????o alcalina e poliuretana derivado do ??leo de mamona com varia????es na propor????o de pr??-pol??mero. Foram utilizados alto teor de fibras (85 wt %) com a varia????o nas propor????es de pr??-pol??mero da poliuretana. As fibras de pia??ava sem tratamento e tratadas foram caracterizadas quimicamente, por FTIR, TGA/DTG e DSC. Caracterizou-se a porcentagem de isocianatos pr??-pol??mero e o ??ndice de hidroxilas do poliol e juntamente com as resinas com varia????es de pr??-pol??mero foi realizado TGA/DTG-DSC e FTIR. Os comp??sitos foram caracterizados quanto ?? sua densidade, inchamento de espessura, FTIR, TGA/DTG, DSC, resist??ncia ?? flex??o, absor????o de ??gua e MEV (superf??cie e regi??o de fratura). O tratamento das fibras de pia??ava proporcionou uma redu????o na porcentagem de hemicelulose, conforme j?? esperado, visando melhorar a superf??cie para ades??o com a matriz. Resultados decorrentes do estudo da varia????o do pr??-pol??mero mostraram que o aumento na propor????o do pr??-pol??mero ocasionou deslocamento nos picos de temperatura de degrada????o, diminuindo a estabilidade t??rmica de acordo com o aumento de isocianato (NCO). A an??lise de FTIR comprova que a quantidade em excesso de pr??-pol??mero (PP) na mistura gerou um res??duo de isocianato n??o reagido ap??s a forma????o da poliuretana. Quanto a caracteriza????o dos comp??sitos por resist??ncia a flex??o, foi observado maior resist??ncia com aumento da propor????o de PP. Os resultados de TGA/DTG e FTIR mostraram os eventos caracter??sticos dos materiais precursores, com destaque para as propriedades da fibra de pia??ava, a qual est?? presente em grande quantidade. Os resultados de inchamento, umidade e flex??o apresentaram valores esperados, os quais est??o dentro da norma. De maneira geral, os comp??sitos CP2 e CP3, com apresentaram resultados promissores para aplica????es em condi????es secas, considerando a grande quantidade de material oriundo de fonte renov??vel, o que tende a favorecer a absor????o de ??gua.

Submitted by Isabelle Lima (isabelle.maciel.lima@gmail.com) on 2019-09-17T21:33:16Z No. of bitstreams: 3 ata de defesa.pdf: 435312 bytes, checksum: 9e7d54fb81c6d7e2c72df3dc0729d57e (MD5) CartaEncaminhamentoAutodep??sito.pdf: 35118 bytes, checksum: 2153f7fa3d2a0e456e95894be968fc20 (MD5) DISSERTA????O FINAL - ISABELLE_VERS??O corrigida dep??sito.pdf: 2304484 bytes, checksum: 6576af00a498720a27c659048fb7d8c0 (MD5) Approved for entry into archive by Engenharia Civil PPGEC (ppgec@ufam.edu.br) on 2019-09-18T13:30:56Z (GMT) No. of bitstreams: 3 ata de defesa.pdf: 435312 bytes, checksum: 9e7d54fb81c6d7e2c72df3dc0729d57e (MD5) CartaEncaminhamentoAutodep??sito.pdf: 35118 bytes, checksum: 2153f7fa3d2a0e456e95894be968fc20 (MD5) DISSERTA????O FINAL - ISABELLE_VERS??O corrigida dep??sito.pdf: 2304484 bytes, checksum: 6576af00a498720a27c659048fb7d8c0 (MD5) Approved for entry into archive by Divis??o de Documenta????o/BC Biblioteca Central (ddbc@ufam.edu.br) on 2019-09-18T15:45:14Z (GMT) No. of bitstreams: 3 ata de defesa.pdf: 435312 bytes, checksum: 9e7d54fb81c6d7e2c72df3dc0729d57e (MD5) CartaEncaminhamentoAutodep??sito.pdf: 35118 bytes, checksum: 2153f7fa3d2a0e456e95894be968fc20 (MD5) DISSERTA????O FINAL - ISABELLE_VERS??O corrigida dep??sito.pdf: 2304484 bytes, checksum: 6576af00a498720a27c659048fb7d8c0 (MD5) Made available in DSpace on 2019-09-18T15:45:14Z (GMT). No. of bitstreams: 3 ata de defesa.pdf: 435312 bytes, checksum: 9e7d54fb81c6d7e2c72df3dc0729d57e (MD5) CartaEncaminhamentoAutodep??sito.pdf: 35118 bytes, checksum: 2153f7fa3d2a0e456e95894be968fc20 (MD5) DISSERTA????O FINAL - ISABELLE_VERS??O corrigida dep??sito.pdf: 2304484 bytes, checksum: 6576af00a498720a27c659048fb7d8c0 (MD5) Previous issue date: 2019-06-17 FAPEAM The use of industrial waste as a raw material in the development of new materials in engineering is a solution for the removal of the solid waste generated, in addition to minimizing the use of natural resources from non-renewable sources. In the process of manufacturing natural fiber brooms, there is a waste of about 40% of the fibers that are used in the process. These fibers remain or go to waste or are burned, and they could be reused for a new use, given that during the process of manufacturing the broom, they do not undergo any kind of chemical modification. In this way, the residue of pia??ava is presented as an alternative source of raw material for the production of polymeric composites, aiming, therefore, a solution for the tailings of the factory and the development of a new product with greater added value. In this sense, the objective of the present work is to evaluate the technical feasibility of the use of the residue of Pia??ava Amaz??nica (Leopoldinia piassaba) from the manufacture of brooms in the production of polymer panels with possibilities of use in the civil construction industry. The present research followed the specifications of the norm NBR 15316-2: 2019 by means of the tests of determination of the moisture content, density, swelling and resistance to the static bending. To evaluate the thermal properties of the panel, preliminary tests were carried out using infrared laser thermography technique on the surface of the material, as well as punctual analyzes with a laser thermometer. The composite panel met the normative requirements regarding the physical properties, but its responses to the mechanical characterization did not meet Brazilian standards. In the conductivity tests the material presented similar behavior to the MDF material, however it is concluded that the panel can not be used as an insulating material. According to the results, it was possible to conclude that the residue presents potential to be applied in panels to be specified in constructive activities, but more studies on the mechanical properties should be carried out. O uso de res??duos industriais como mat??ria-prima no desenvolvimento de novos materiais na engenharia ?? uma solu????o para a retirada do res??duo s??lido gerado, al??m de minimizar o uso de recursos naturais, provenientes de fontes n??o renov??veis. No processo de fabrica????o de vassouras de fibras naturais, h?? um desperd??cio de ordem de cerca de 40% das fibras que s??o utilizadas no processo. Essas fibras remanescentes ou v??o para o lixo ou s??o queimadas, sendo que as mesmas poderiam ser reaproveitadas para um novo uso, tendo em vista que durante o processo de fabrica????o da vassoura, elas n??o passam por nenhum tipo de modifica????o qu??mica. Desta forma, o res??duo de pia??ava apresenta-se como uma alternativa de fonte de mat??ria-prima para a produ????o de comp??sitos polim??ricos, visando, desse modo, uma solu????o para o rejeito da f??brica e o desenvolvimento de um novo produto com maior valor agregado. Nesse sentido, o objetivo do presente trabalho ?? avaliar a viabilidade t??cnica da utiliza????o do res??duo de Pia??ava Amaz??nica (Leopoldinia piassaba) oriundo da fabrica????o de vassouras na produ????o de pain??is polim??ricos com possibilidades de uso na ind??stria da constru????o civil. A presente pesquisa seguiu as especifica????es da norma NBR 15316-2:2019 por meio da realiza????o dos ensaios de determina????o do teor de umidade, densidade, inchamento e resist??ncia ?? flex??o est??tica. Para avaliar as propriedades t??rmicas do painel, foram realizados testes preliminares utilizando a t??cnica de termografia a laser por infravermelho na superf??cie do material, al??m de an??lises pontuais com term??metro a laser. O painel comp??sito atendeu aos requisitos normativos em rela????o as propriedades f??sicas, por??m suas respostas ?? caracteriza????o mec??nica n??o atenderam ??s normas brasileiras. Nos ensaios de condutividade o material apresentou comportamento similar ao material MDF, por??m conclui-se que o painel n??o pode ser utilizado como material isolante. De acordo com os resultados, foi poss??vel concluir que o res??duo apresenta potencial para ser aplicado em pain??is a serem especificados em atividades construtivas, por??m devem ser realizados mais estudos acerca das propriedades mec??nicas.

Submitted by Maria Clara Macedo Pereira (cmp_maria@hotmail.com) on 2019-05-24T00:36:12Z No. of bitstreams: 4 Ata de defesa.jpg: 304861 bytes, checksum: 9ecb8abd3af67d623965e9699b1caf19 (MD5) Carta de encaminhamento.pdf: 259752 bytes, checksum: d6d6aa82e2b2f5f603fecdd7d6ea3557 (MD5) DISSERTA????O MARIA CLARA MACEDO PPGEC.pdf: 3184126 bytes, checksum: 077dea97d9bc46294b333a00160ead45 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Approved for entry into archive by Engenharia Civil PPGEC (ppgec@ufam.edu.br) on 2019-05-24T14:15:04Z (GMT) No. of bitstreams: 4 Ata de defesa.jpg: 304861 bytes, checksum: 9ecb8abd3af67d623965e9699b1caf19 (MD5) Carta de encaminhamento.pdf: 259752 bytes, checksum: d6d6aa82e2b2f5f603fecdd7d6ea3557 (MD5) DISSERTA????O MARIA CLARA MACEDO PPGEC.pdf: 3184126 bytes, checksum: 077dea97d9bc46294b333a00160ead45 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Approved for entry into archive by Divis??o de Documenta????o/BC Biblioteca Central (ddbc@ufam.edu.br) on 2019-05-24T19:59:15Z (GMT) No. of bitstreams: 4 Ata de defesa.jpg: 304861 bytes, checksum: 9ecb8abd3af67d623965e9699b1caf19 (MD5) Carta de encaminhamento.pdf: 259752 bytes, checksum: d6d6aa82e2b2f5f603fecdd7d6ea3557 (MD5) DISSERTA????O MARIA CLARA MACEDO PPGEC.pdf: 3184126 bytes, checksum: 077dea97d9bc46294b333a00160ead45 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Made available in DSpace on 2019-05-24T19:59:15Z (GMT). No. of bitstreams: 4 Ata de defesa.jpg: 304861 bytes, checksum: 9ecb8abd3af67d623965e9699b1caf19 (MD5) Carta de encaminhamento.pdf: 259752 bytes, checksum: d6d6aa82e2b2f5f603fecdd7d6ea3557 (MD5) DISSERTA????O MARIA CLARA MACEDO PPGEC.pdf: 3184126 bytes, checksum: 077dea97d9bc46294b333a00160ead45 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2019-03-25 CAPES - Coordena????o de Aperfei??oamento de Pessoal de N??vel Superior In the present study, the development and mechanical characterization of a sandwich panel composed of a lightweight concrete core with a??a?? seed and another by expanded polystyrene, with faces of cementitious composites reinforced with long jute fibers were carried out. In the production of the core, three types of traces were studied with two types of different aggregates (expanded polystyrene and a??a?? seed), the a??a?? seed (natural aggregate) was chosen aiming the reduction of the residue generation and increase of the added value of this material. The core was analyzed for resistance range, type of treatment used in the natural aggregate and density. The faces were produced with 6% content of long jute fibers, aligned unidirectionally and distributed in 3 layers, forming a laminate. The laminates and the sandwich panel were analyzed by four-point bending tests. The treatment combined with saturation in the natural aggregate added to the strength in the core composite and the treatment with paraffin or resin reduced the water absorption about 36%, it was observed that the density of the core influenced the compressive strength. The average of tensile stress of the laminates was 27,7 MPa with an maximun deflection of 5,10 mm. The sandwich panel ruptured by bending of the lower face and the maximum rupture load was 3,67 KN. With the present results were observed advantages of using the sandwich-panel element in the construction system and the use of the natural aggregate in the core from both a mechanical and an environmental point of view were observed. No presente estudo realizou-se o desenvolvimento e caracteriza????o mec??nica de um painel sandu??che composto por n??cleo de concreto leve com caro??o de a??a?? e outro por poliestireno expandido, com faces de comp??sitos ciment??cios refor??ados com fibras longas de juta. Na produ????o do n??cleo estudou-se tr??s tipos de tra??os com dois tipos de agregados diferentes (poliestireno expandido e caro??o de a??a??), escolheu-se o caro??o de a??a?? (agregado natural) visando a redu????o da gera????o de res??duo e eleva????o do valor agregado deste material. O n??cleo foi analisado quanto a resist??ncia mec??nica, o tipo de tratamento utilizado no agregado natural e a densidade. As faces foram produzidas com o teor de 6% de fibras de juta longas, alinhadas unidirecionalmente e distribu??das em 3 camadas, formando um laminado. Os laminados e o painel sandu??che foram analisados por meio de ensaios de flex??o em quatro pontos. O tratamento aliado com satura????o no agregado natural acrescentou ?? resist??ncia no comp??sito do n??cleo e o tratamento com parafina ou resina reduziu em cerca de 36% a absor????o de ??gua, observou-se que a densidade do n??cleo influenciou na resist??ncia a compress??o. A tens??o m??dia de ruptura dos laminados foi de 27,7 MPa com deflex??o m??xima de 5,10 mm. O painel sandu??che rompeu por flex??o da face inferior e com carga m??xima de ruptura de 3,67 KN. Com os resultados apresentados observou-se vantagens da utiliza????o do elemento painel sandu??che no sistema construtivo e a utiliza????o do agregado natural no n??cleo tanto do ponto de vista mec??nico quanto ambiental. Dificuldades encontradas com rela????o a falta de equipamentos na Universidade Federal do Amazonas para a realiza????o de ensaios mec??nicos voltados ao concreto

Submitted by Adma Higuchi (darwichadma@gmail.com) on 2018-12-15T18:28:04Z No. of bitstreams: 4 Disserta????o_Adma Darwich Higuchi_final.pdf: 3712257 bytes, checksum: 7360ddc10b09f4ff6167c2eaddd6f608 (MD5) Carta de Encaminhamento Adma.pdf: 387576 bytes, checksum: 162f6414e8cb0b118b827bf8b6bf3ef8 (MD5) Ata de Defesa Adma.pdf: 651433 bytes, checksum: fb50203211420fe3e3935eaf3ade705f (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Approved for entry into archive by Engenharia Civil PPGEC (ppgec@ufam.edu.br) on 2019-01-16T20:31:15Z (GMT) No. of bitstreams: 4 Disserta????o_Adma Darwich Higuchi_final.pdf: 3712257 bytes, checksum: 7360ddc10b09f4ff6167c2eaddd6f608 (MD5) Carta de Encaminhamento Adma.pdf: 387576 bytes, checksum: 162f6414e8cb0b118b827bf8b6bf3ef8 (MD5) Ata de Defesa Adma.pdf: 651433 bytes, checksum: fb50203211420fe3e3935eaf3ade705f (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Approved for entry into archive by Divis??o de Documenta????o/BC Biblioteca Central (ddbc@ufam.edu.br) on 2019-01-17T14:35:06Z (GMT) No. of bitstreams: 4 Disserta????o_Adma Darwich Higuchi_final.pdf: 3712257 bytes, checksum: 7360ddc10b09f4ff6167c2eaddd6f608 (MD5) Carta de Encaminhamento Adma.pdf: 387576 bytes, checksum: 162f6414e8cb0b118b827bf8b6bf3ef8 (MD5) Ata de Defesa Adma.pdf: 651433 bytes, checksum: fb50203211420fe3e3935eaf3ade705f (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Made available in DSpace on 2019-01-17T14:35:06Z (GMT). No. of bitstreams: 4 Disserta????o_Adma Darwich Higuchi_final.pdf: 3712257 bytes, checksum: 7360ddc10b09f4ff6167c2eaddd6f608 (MD5) Carta de Encaminhamento Adma.pdf: 387576 bytes, checksum: 162f6414e8cb0b118b827bf8b6bf3ef8 (MD5) Ata de Defesa Adma.pdf: 651433 bytes, checksum: fb50203211420fe3e3935eaf3ade705f (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2018-11-01 Funda????o de Amparo a Pesquisa do Estado do Amazonas - FAPEAM In the Industrial Pole of Manaus there is great production of residue from the cutting and lapidation of flat glass plates. An alternative to reducing the environmental impact generated by the disposal of glass residue and CO2 emissions generated during the manufacture of cement is its incorporation in concrete as supplementary cementitious material. In this work, the study of the effect of different contents of ground glass residue (GGR) as partial replacement of cement for the production of high performance self-compacting concrete (HPSCC) was carried out. In doing so, was carried out a study of grinding of this residue, which was then chemically and physically characterized and studied in cement pastes, mortar and concrete. In pastes, the calcium hydroxide content was evaluated at 28 days of cure by thermal analyzes. In mortars, an efficiency study was performed in mixtures with 5%, 10%, 15%, 20% and 25% of GGR in partial replacement of cement. It was also determined the ability to mitigate the expansions caused by alkali-silica reaction (ASR) in mixtures with contents of 10%, 15% and 20% of GGR. Using the mix design proposed by Le et al. (2015), it was possible to produce HPSCC. In plastic state, tests of segregation resistance, fluidity, fill, viscosity and passing ability were performed. In hardened state, diametral compressive tensile strength, axial compressive strength and water absorption by immersion were performed. In plastic state, all concretes showed scattering compatible with self-compacting concretes, without evidence of segregation and could be considered suitable for most structural applications. In hardened state, among the studied contents, concretes and mortars containing 15% RVM presented mechanical performance superior to others after 28 days of submerged curing, both in compressive and tensile strength. All the concretes studied showed an activity index higher than 75% at 7 days, which classifies the GGR as a pozzolanic material according to ASTM C 618 and EN 450-1. The mortars studied also presented similar behavior, except for those containing 25% GGR. When it comes to durability, expansions, water absorption and void contents decreased as GGR content increased in substitution of cement. The partial replacement of the cement by GGR can be an alternative of low environmental impact and economically viable in the production of HPSCC. No Polo Industrial de Manaus h?? grande produ????o de res??duo proveniente do corte e lapida????o de placas de vidro plano. Uma alternativa para a diminui????o do impacto ambiental gerado pelo descarte do res??duo de vidro e pelas emiss??es de CO2 geradas durante a manufatura do cimento ?? a sua incorpora????o no concreto como material ciment??cio suplementar. Neste trabalho, foi analisado o efeito de diferentes teores de res??duo de vidro mo??do (RVM), como substitui????o parcial do cimento, na produ????o de concreto autoadens??vel de alto desempenho (CAAD). Foi realizado a moagem do res??duo. Em seguida, foi caracterizado qu??mica e fisicamente e estudado na pasta ciment??cia, na argamassa e no concreto. Nas pastas, avaliou-se o teor de hidr??xido de c??lcio aos 28 dias de cura por meio de an??lises t??rmicas. Nas argamassas, realizou-se um estudo de efici??ncia de misturas com 5%, 10%, 15%, 20% e 25% de RVM em substitui????o parcial ao cimento. Tamb??m foi determinada a capacidade de mitiga????o das expans??es provocadas pelas rea????es ??lcalis-s??lica (RAS) com teores de 10%, 15% e 20% de RVM. Utilizando-se a metodologia de dosagem Le et al. (2015) adaptada, foi poss??vel produzir CAAD. No estado fluido foram realizados testes de resist??ncia ?? segrega????o, fluidez, preenchimento, viscosidade e habilidade passante. No estado endurecido, foram conduzidos testes de resist??ncia ?? tra????o por compress??o diametral, resist??ncia ?? compress??o axial e absor????o de ??gua por imers??o. Ficou evidenciado que, no estado fluido, todos os concretos desenvolvidos apresentaram espalhamento compat??vel com concretos autoadens??veis, sem evid??ncia de segrega????o, podendo ser considerados adequados para a maioria das aplica????es estruturais. No estado endurecido, dentre os teores estudados, concretos e argamassas contendo 15% de RVM apresentaram desempenho mec??nico superior aos demais a partir dos 28 dias de cura submersa, tanto na compress??o quanto na tra????o. Todos os concretos estudados apresentaram ??ndice de desempenho superior a 75% a partir de 7 dias, o que classifica o RVM como um material pozol??nico, de acordo com a ASTM C 618 e a EN 450-1. As argamassas estudadas tamb??m apresentaram comportamento semelhante, com exce????o daquelas contendo 25% de RVM. J?? em rela????o ?? durabilidade, conforme o aumento de teor de RVM em substitui????o ao cimento, observou-se diminui????o das expans??es provenientes das RAS, da absor????o de ??gua e ??ndices de vazios. A substitui????o parcial do cimento por RVM pode ser uma alternativa de baixo impacto ambiental e economicamente vi??vel na produ????o de CAAD.