A systematic review of corncob ash in construction: Current findings and future directions

Abstract

The increasing environmental impact of traditional cement production necessitates the exploration of sustainable alternatives in construction materials. This paper investigates corncob ash (CCA), an agro-waste by-product, as a viable substitute for cement in several construction and building material applications such as concrete, masonry, geopolymer materials, and soil stabilization. A comprehensive review of existing literature reveals that CCA enhances the mechanical properties of these materials, such as compressive strength and durability, and significantly reduces the carbon footprint associated with conventional cement production. The findings indicate that incorporating CCA improves workability and resistance to aggressive environmental conditions, positioning it as a promising material for sustainable construction. Furthermore, the paper identifies gaps in current research, particularly concerning long-term performance and standardization of testing methods. Future research directions are proposed, including optimization of processing techniques, life cycle assessments, and real-world applications, to fully leverage the potential of CCA in promoting environmentally friendly construction practices. Overall, this study underscores the critical role of CCA in advancing sustainability within the construction industry.