Assessment of compressive strength performance of corn cob ash blended concrete: a review

The construction industry continuously seeks innovative materials to enhance sustainability and performance. Successful adoption, however, hinges on reliable performance data. Corncob ash (CCA) has been proposed to partially replace ordinary Portland cement (OPC) in concrete, yet varying results in compressive strength (CS) hinder widespread use. This systematic review analyzed experimental articles from 2010-2023, evaluating CS of OPC and CCA blended concrete at a 28-day curing period. It examined the relationship between compressive strength and CCA replacement percentage. Out of 23 studies (9.74% of the total), 60.9% reported lower CS in CCA blended concrete (6%-35.8% reduction). However, 17.4% demonstrated increased CS (3.6%-18.4% rise) with higher CCA replacement. Linear regression analysis yielded p<0.05, indicating significant potential for CCA to enhance concrete<br />compressive strength. Conclusively, an optimum 6.86% CCA substitution in concrete without optimization maintains structural integrity and promotes sustainable practices<br />in the industry.