ANJOS, Cássia Mendonça dos.; http://lattes.cnpq.br/0763317847663674; ANJOS, Cássia Mendonça dos.
Abstract:
There is an evident growth in waste generation over the last decades, especially in
developing countries. The mining industry produces large quantities and different kinds
and levels of dangerousness, such as the kaolin processing industry, which produces
waste based on silica, mica and kaolinite. Disposal of this residue causes a significant
environmental impact, which could be minimized with the use of raw materials for use
in civil construction. This research has as main objective to study the incorporation of
the kaolin processing waste into soil-lime bricks. Conventional materials (soil, lime) and
alternative (waste) were characterized by the following tests: particle size analysis by
laser diffraction, chemical analysis, X-ray diffraction, differential thermal analysis and
thermogravimetric analysis. The residues of kaolin were calcined at a temperature of
800 ° C for evaluation of pozzolanic activity. Foram moldados corpos-de-prova
convencionais (solo-cal) e alternatives incorporados com 10%, 20%, 30% e 40% de
residuo de caulim em substituicao do aglomerante cal. Test specimens used in
conventional (soil-lime) and alternative embedded with 10%, 20%, 30% and 40% of
residual kaolin in place of the lime binder were molded. Posteriormente, os corpos-deprova
foram curados por periodos de 28, 60 e 90 dias. Later, the specimens were
cured for periods of 28, 60 and 90 days. Verificaram-se as propriedades fisicomecanicas
de resistencia a compressao simples e absorgao de agua. Physical and
mechanical properties of compressive strength and water absorption were verified.
After analyzing the results, we concluded that residues of kaolin have pozzolanic
activity and properties suitable for use in soil-lime.
