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Start Over Descriptor "Cristaloquímica" Publisher associacao brasileira de ceramica
3 results on '"Cristaloquímica"'

1. Portland clinker production with carbonatite waste and tire-derived fuel: crystallochemistry of minor and trace elements

Author

F. R. D. Andrade, M. Pecchio, J. M. C. Santos, and Y. Kihara

Subjects
combustível derivado de pneus, carbonatito, clínquer, cristaloquímica, Engineering (General). Civil engineering (General), TA1-2040
Abstract

This paper presents results on the composition of Portland clinkers produced with non-conventional raw-materials and fuels, focusing on the distribution of selected trace elements. Clinkers produced with three different fuel compositions were sampled in an industrial plant, where all other parameters were kept unchanged. The fuels have chemical fingerprints, which are sulfur for petroleum coke and zinc for TDF (tire-derived fuel). Presence of carbonatite in the raw materials is indicated by high amounts of strontium and phosphorous. Electron microprobe data was used to determine occupation of structural site of both C3S and C2S, and the distribution of trace elements among clinker phases. Phosphorous occurs in similar proportions in C3S and C2S; while considering its modal abundance, C3S is its main reservoir in the clinker. Sulfur is preferentially partitioned toward C2S compared to C3S. Strontium substitutes for Ca2+ mainly in C2S and in non-silicatic phases, compared to C3S.

Published
2014
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2. Portland clinker production with carbonatite waste and tire-derived fuel: crystallochemistry of minor and trace elements.

Author

Andrade, F. R. D., Pecchio, M., Santos, J. M. C., and Kihara, Y.

Subjects
CEMENT clinkers, CARBONATITES, TRACE elements, SULFUR, ELECTRON probe microanalysis, PHOSPHORUS
Abstract

Copyright of Ceramica is the property of Associacao Brasileira de Ceramica and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2014
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3. Produção de cimento Portland a partir de resíduos de carbonatito e com combustível derivado de pneus: cristaloquímica de elementos menores e traços

Author

Yushiro Kihara, J. M. C. Santos, Fábio Ramos Dias de Andrade, and M. Pecchio

Subjects
clinker, PNEUS, chemistry.chemical_element, Electron microprobe, Raw material, Strontium, Clinker (waste), tire-derived fuel, combustível derivado de pneus, cristaloquímica, Metallurgy, carbonatito, Petroleum coke, Engineering (General). Civil engineering (General), carbonatite, Sulfur, crystallochemistry, clínquer, chemistry, lcsh:TA1-2040, Ceramics and Composites, Carbonatite, Environmental science, Tire-derived fuel, TA1-2040, lcsh:Engineering (General). Civil engineering (General)
Abstract

This paper presents results on the composition of Portland clinkers produced with non-conventional raw-materials and fuels, focusing on the distribution of selected trace elements. Clinkers produced with three different fuel compositions were sampled in an industrial plant, where all other parameters were kept unchanged. The fuels have chemical fingerprints, which are sulfur for petroleum coke and zinc for TDF (tire-derived fuel). Presence of carbonatite in the raw materials is indicated by high amounts of strontium and phosphorous. Electron microprobe data was used to determine occupation of structural site of both C3S and C2S, and the distribution of trace elements among clinker phases. Phosphorous occurs in similar proportions in C3S and C2S; while considering its modal abundance, C3S is its main reservoir in the clinker. Sulfur is preferentially partitioned toward C2S compared to C3S. Strontium substitutes for Ca2+ mainly in C2S and in non-silicatic phases, compared to C3S. Este artigo apresenta dados composicionais de amostras de clínquer Portland produzido com matérias-primas e combustíveis não convencionais, em especial no que diz respeito à distribuição de elementos menores e traços. Foram amostrados clínqueres produzidos com três misturas diferentes de combustíveis, enquanto os demais parâmetros foram mantidos constantes. Os combustíveis apresentam características químicas típicas, como o teor elevado de enxofre no coque de petróleo e o alto teor de zinco no combustível derivado de pneus. O uso de carbonatito como matéria-prima se reflete nos teores elevados de estrôncio e fósforo. Dados de microssonda eletrônica foram usados para determinar a ocupação de sítios estruturais de C3S e C2S, e para modelar a distribuição de elementos traços entre as fases do clínquer. O fósforo ocorre em proporções similares em C3S e C2S; se considerarmos sua abundância modal, o C3S é o principal reservatório de fósforo no clínquer. O enxofre é preferencialmente concentrado em C2S em comparação com C3S. O estrôncio substitui Ca2+ principalmente em C2S e em fases não-silicáticas, em comparação com C3S.

Published
2014

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