Abstract
This paper presents a study related to the application of geopolymers cements as a binder on production of mortars for construction and building materials. Geopolymeric cements were produced from metakaolin, clay brick waste and activator consisting of potassium hydroxide and potassium silicate. The mixtures were prepared using standard production processes according Brazilian standards. Hardened properties of density, water absorption, 7-day and 28-day compressive strength were evaluated on samples of cured mortars. Selected samples of fractured specimens were subjected to microstructural characterisation via scanning electron microscopy, X-ray diffraction and thermal analysis. The results for the 7-day and 28-day compressive strength of geopolymer mortars showed that these materials have properties as good as those obtained from Portland cement mortars. Microstructural characterization of fractured pieces showed a morphology usually found in the category of geopolymers product structures.
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