Avaliação de argamassa mista de revestimento com substituição da areia natural por cinza de bagaço de cana-de-açúcar

Abstract

Waste of agribusiness has been appraised in cement base materials. This work aimed to study the effects in the plastering composite mortar. The procedure was the mixture of quicklime powder with water, natural sand and cane sugar bagasse ash (CSA) with replacement of 5%, 10%, 15% and 20%, respectively, of sand, from in proportion 1:6,26 (by volume), which were ripened for hydration of the lime and then dried in an oven, cement was added from composition in the proportion of the reference 1:1: 5:9.4 (by volume). We evaluated the consistency, specific mass, air content, water retention and exudation in the plastic state, axial compressive strength, the tensile strength by diametrical, static deformation modulus, water absorption by immersion and by capillary in the hardened state. The results indicated reduction in water retention and air content, with 5% replacement by improved water absorption and by capillary and water exudation; up to 15% improved mechanical properties. Thus, can be considered feasible to replace 5% of sand by CSA for the production of composite mortar. Keywords: capillarity, mortar, agribusiness waste.