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Your search keyword '"Bignozzi, Maria Chiara"' showing total 13 results
Start Over Author "Bignozzi, Maria Chiara" Journal construction and building materials
13 results on '"Bignozzi, Maria Chiara"'

4. Self-compacting concrete with recycled concrete aggregate: Study of the long-term properties

Author

Manzi, Stefania, Mazzotti, Claudio, and Bignozzi, Maria Chiara

Subjects
Concretes -- Research -- Mechanical properties, Aggregates (Building materials) -- Quality management -- Usage, Shrinkage (Materials) -- Analysis, Business, Construction and materials industries
Abstract

ABSTRACT This paper investigates the shrinkage and creep of self-compacting concrete prepared with coarse and fine recycled concrete aggregates (up to 40% of total amount of aggregates). Physical properties and [...]

Published
2017
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5. Effect of the chemical composition of different types of recycled glass used as aggregates on the ASR performance of cement mortars

Author

Saccani, Andrea, Bignozzi, Maria Chiara, Barbieri, Luisa, Lancellotti, Isabella, and Bursi, Elena

Subjects
Aggregates (Building materials) -- Analysis -- Chemical properties, Mortar -- Analysis -- Chemical properties, Cements (Building materials) -- Analysis -- Mechanical properties, Business, Construction and materials industries
Abstract

ABSTRACT Glass with different chemical compositions, deriving from separate collection, has been used as fine aggregate to formulate cementitious mortars, substituting natural sand. Glass coming from cathode-ray tube monitors, fluorescent [...]

Published
2017
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6. Valorization of spent cooking oils in hydrophobic waste-based lime mortars for restorative rendering applications

Author

Pahlavan, Parsa, Manzi, Stefania, Rodriguez-Estrada, Maria Teresa, and Bignozzi, Maria Chiara

Subjects
Building materials durability -- Forecasts and trends, Refractory mortars -- Chemical properties, Edible vegetable oils -- Chemical properties, Market trend/market analysis, Business, Construction and materials industries
Abstract

ABSTRACT The suitability of new lime mortars for restorative rendering applications was investigated. Air-, formulated- and hydraulic-lime mortars were synthesized with inclusion of two different types of spent sunflower cooking [...]

Published
2017
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7. Influence of fine aggregates on the microstructure, porosity and chemico-mechanical stability of inorganic polymer concretes

Author

Kamseu, Elie, Ponzoni, Chiara, Tippayasam, Chayanee, Taurino, Rosa, Chaysuwan, Duangrudee, Bignozzi, Maria Chiara, Barbieri, Luisa, and Leonelli, Cristina

Subjects
Concrete -- Analysis -- Mechanical properties, Building materials -- Service life, Porosity -- Analysis, Business, Construction and materials industries
Abstract

ABSTRACT This work investigates the effects of the structure, the bulk chemical composition and amount of the aluminosilicate fines on the strength development, pore refinement, water permeability, moisture control capacity [...]

Published
2015
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8. Room temperature alkali activation of fly ash: the effect of [Na.sub.2]O/Si[O.sub.2] ratio

Author

Bignozzi, Maria Chiara, Manzi, Stefania, Natali, Maria Elia, Rickard, William D.A., and van Riessen, Arie

Subjects
Binders (Materials) -- Analysis -- Reports, Portland cement -- Analysis -- Properties -- Thermal properties, Fly ash -- Analysis -- Properties -- Thermal properties, Business, Construction and materials industries
Abstract

ABSTRACT Alkali activation of fly ash can be considered as one of the more promising alternative systems to traditional hydraulic binders, particularly if the process can be carried out at [...]

Published
2014
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9. Design of inorganic polymer cements: effects of matrix strengthening on microstructure

Author

Kamseu, Elie, Bignozzi, Maria Chiara, Melo, U.C., Leonelli, Cristina, and Sglavo, Vincenzo M.

Subjects
Stability -- Research, Cement -- Chemical properties -- Research, Microstructure -- Research, Business, Construction and materials industries
Abstract

ABSTRACT The effects of bulk composition and microstructure on strengthening mechanisms and fracture resistance were investigated for metakaolin based geopolymers. Crack initiation and propagation under mechanical and environmental stresses were [...]

Published
2013
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12. Alkali activated lightweight mortars for passive fire protection: A preliminary study

Author

Raffaela Moricone, Lorenza Carabba, Alessandro Tugnoli, Giordano Emrys Scarponi, Maria Chiara Bignozzi, Carabba, Lorenza, Moricone, Raffaela, Scarponi, Giordano Emry, Tugnoli, Alessandro, and Bignozzi, Maria Chiara

Subjects
Materials science, 0211 other engineering and technologies, 020101 civil engineering, Foaming agent, Fly ash, 02 engineering and technology, Geopolymer, 0201 civil engineering, Thermal conductivity, Passive fire protection, 021105 building & construction, Fire resistance, General Materials Science, Composite material, Civil and Structural Engineering, Cement, Waste processing, Aggregate (composite), Building and Construction, Alkali activated material, Materials Science (all), Mortar
Abstract

Alkali activated lightweight mortars, obtained by room temperature activation of coal fly ash, were studied as passive fire protection systems for steel elements. Physical, mechanical and thermal properties were investigated as a function of the compositional Si/Al molar ratio and of the amount of lightweight aggregate and foaming agent. Experimental findings were used as input data to assess their fire resistance by finite volume simulations. Results pointed out that the optimized alkali activated lightweight mortars are able to outperform alternative commercial cement-based mortars, thus representing a promising technology.

Published
2019

13. Influence of fine aggregates on the microstructure, porosity and chemico-mechanical stability of inorganic polymer concretes

Author

Rosa Taurino, Duangrudee Chaysuwan, Elie Kamseu, Luisa Barbieri, Chayanee Tippayasam, Maria Chiara Bignozzi, Cristina Leonelli, Chiara Ponzoni, Kamseu, Elie, Ponzoni, Chiara, Tippayasam, Chayanee, Taurino, Rosa, Chaysuwan, Duangrudee, Bignozzi, Maria Chiara, Barbieri, Luisa, and Leonelli, Cristina

Subjects
Glass recycling, Inorganic polymer, Materials science, Moisture, Building and Construction, Aluminosilicate fines, Inorganic polymer concretes, MicrostructureDurability, Strength, Porosity, Aluminosilicate fine, Aluminosilicate fines, Microstructure, Durability, Amorphous solid, Crystallinity, Inorganic polymer concrete, General Materials Science, Materials Science (all), Strength, MicrostructureDurability, Composite material, Inorganic polymer concretes, Porosity, Curing (chemistry), Civil and Structural Engineering
Abstract

This work investigates the effects of the structure, the bulk chemical composition and amount of the aluminosilicate fines on the strength development, pore refinement, water permeability, moisture control capacity and the microstructure of inorganic polymer concretes (IPC). The amorphous fines, one from pumice and another from recycled glass, presented sponge-like microstructure with tortuous pore network that maintained the presence of fine capillary pores while semi-crystalline feldspar sludge, the third type of fine aggregates used for this study, showed more dense and compact microstructure that explain the higher strength enhancement. Both amorphous and semicrystalline fines contributed to decrease the porosity, improve the strength and microstructure. However, based on the moisture control capacity and the durability indicators, the fine aggregate derived from semicrystalline feldspar was found to be more appropriate and efficient for the development of IPC at short time scale of curing. Pumice fine aggregate was found to be effective only with a long term curing. (C) 2015 Elsevier Ltd. All rights reserved.

Published
2015

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