Experimental Investigation of Micronized Biomass Silica-Based Concrete as a Sustainable Construction Material

Abstract

This study explores the potential of Micronized Biomass Silica (MBS), a high-silica agricultural byproduct, as a partial substitute for cement in concrete mixtures. MBS can lead to a reduction in CO2 emissions associated with cement production, contributing to more sustainable concrete practices. The study explores the effects of replacing cement with MBS in varying percentages, ranging from 3% to 12% at intervals of 3%, to identify the optimal mix combination. Concrete samples, both with and without the addition of Micronized Biomass Silica (MBS), were subjected to compressive strength and split tensile strength tests. The results indicate that incorporating up to 6% MBS enhances the strength of concrete, while higher percentages lead to a decrease in strength. Additionally, a detailed microstructural analysis of the concrete with MBS was performed using Scanning Electron Microscopy (SEM), which provided insights into the mechanisms underlying the observed strength development. The optimal percentage of MBS for enhanced strength development is 6%, as it improves compressive and split tensile strength while enhancing the interfacial transition zone. The findings suggest that MBS can be effectively utilized to improve concrete performance at optimal replacement levels.