Análise do desempenho de argamassa produzida com substituição parcial do cimento Portland por cinza de casca de arroz (Oryza sativa).

Abstract

This study analyzed the performance of mortars with partial replacement of cement by rice husk ash (RHA) at levels of 0%, 5%, 10% and 15%, with regard to compressive strength, flexural tensile strength and water absorption of test specimens aged 7 and 28 days of curing. The results revealed that the addition of RHA impacted the performance of the analyzed mortars, at all percentages studied. The tensile strength was stable with 5% RHA, regardless of the curing time. The compressive strength of the mortars showed a progressive reduction with the increase in the replacement level of Portland cement by rice husk ash (RHA), reaching a reduction of 56.9% after 28 days of curing. Despite the reduction observed in values, all compositions with replacement met the minimum compressive strength limit established by the standard, being technically viable for application as laying mortar. The study contributes to the technical analysis of the incorporation of agro-industrial waste in civil construction as supplementary cementitious material, promoting environmental sustainability.