COMPARATIVE STUDY OF CARBONATION ON CONCRETE USING AGRICULTURAL WASTE AND INDUSTRIAL WASTE

This research undertakes a comparative examination of how carbonation affects concrete that incorporates rice husk ash (RHA) and fly ash (FA) as supplementary cementitious materials (SCMs), with the goal of advancing sustainable, low-carbon concrete solutions for construction. Key aspects include comparing carbonation depths in concrete with RHA versus FA, evaluating effects on mechanical and physical properties like strength and permeability, analyzing compressive strength changes due to carbonation, and suggesting optimized mixes using these SCMs. Utilizing RHA (an agricultural by-product) and FA (an industrial by-product) in concrete promotes resource efficiency, mitigates waste-related environmental issues, and potentially boosts durability in settings with high CO₂ levels like urban areas. Outcomes can guide the use of these alternative materials in construction, fostering circular economy approaches and cutting cement usage, in line with efforts to curb CO₂ emissions and encourage eco-friendly building practices. By exploring the carbonation performance of RHA and FA concrete, this study addresses knowledge gaps and supports the development of more sustainable infrastructure. Additionally, findings may aid in formulating guidelines for incorporating RHA and FA into concrete mixes for enhanced sustainability and performance in various environmental conditions. Keywords: Carbonation, Rice Husk Ash (RHA), Fly Ash (FA), Sustainable Concrete, Supplementary Cementitious Materials (SCMs), Durability.