Evaluación de la reacción al fuego de morteros de cemento con adiciones de cenizas de cáscara de arroz derivadas de desechos agrícolas pretratadas con agua y ácido acético

Abstract

Abstract: This research addresses the sustainable use of agricultural waste to improve the properties of cement mortar. The main objective of this study is to analyze the effects of rice husk ash (RHA) pretreatment on the fire resistance and mechanical properties of mortars, contributing to sustainable construction and fire safety. Within this framework, a theoretical study is developed, describing the background on the fire resistance of traditional mortars, the impact of supplementary cementitious materials (SCMs), and the behavior of pretreated ash. The methodology included the processes of obtaining raw materials, applied pretreatments, calcination, and preparation of mixtures with a 10% cement substitution. Tests were performed to evaluate particle size distribution, compressive strength, physical properties, and fire behavior. The study concludes that mortars with CCA showed favorable performance, improved in fire resistance, thermal stability and reduced porosity, which confirms their viability as a supplementary cementitious material, giving a sustainable approach to construction with the use of organic waste.