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SOUZA, Paulo Sérgio Lima; DAL MOLIN, Denise Carpena Coitinho. Viability of use of calcined clays, as pozzolans of high reativity. In: INTERNATIONAL CONFERENCE ON HIGH-PERFORMANCE CONCRETE, PERFORMANCE AND QUALITY OF CONCRETE STRUCTURES, 3., 2002, Recife. Anais… Recife, 2002.
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Número de Trabalhos: 23 (Com arquivo PDF disponíveis: 14)
Citações: 3
Índice h: 1  
Co-autores: Nenhum co-autor encontrado

Dados do autor na base InfoHab:
Número de Trabalhos: 3 (Nenhum com arquivo PDF disponível)
Citações: Nenhuma citação encontrada
Índice h: Indice h não calculado  
Co-autores: Nenhum co-autor encontrado

Abstract

The present work deals with the use of clays like high reativity metakaolin, as pozzolans for concrete. This study adopted two clays types: kaolinite and kaolin reject used by an paper industry. In this second clay, besides the possible technical advantages, the ecological character of the use of a reject that has been providing a great aggression to the environment must be considered. Inicially, the chemical and mineralogical characteristics of the clays were determined. After this, calcination and milling was carried out aiming at obtaining materials with pozzolanic activity. After milling, took place in the clay kaolinite and in the reject, with the best physical characteristics, lab tests were carried out verify the pozzolanic activity of this materials with the portland cement and with the lime. The results show a low performance of the kaolinite and a high performance of the reject industrial. The low performance of the kaolinite was credited to the homogeneity lack from calcination, as the material was obtained after the calcination, and the low efficiency of its milling process.
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