Síntese e caracterização química, física e mecânica de geopolímero utilizando Caulim da Amazônia Desidroxilizado

Abstract

Geopolymers are part of a class of materials with cementitious properties, materials that can be produced through low cost raw materials, with low energy expenditure and mainly with low emission of toxic gases into the atmosphere. This study obtained chemical and physical characteristics and mechanical properties of the metacaulim geopolymer cement from Amazonian kaolin. The results showed compressive strength of up to 61.4 MPa after 28 (twenty eight) days and concluded the necessary time of calcination to obtain the best metacaulim that was 750oC for 6 hours, despite its dehydroxylation around ~530º C. Another important aspect is to obtain a good compressive strength and to combine the granulometry and the amorphous phase of the metakaolin. The best results were that obtained by geopolymers produced from metakaolin with smaller granulometry. The metakaolin produced by Amazonian kaolin proved to be a noble precursor for geopolymer’s applications.