ASSESSMENT OF COMPRESSIVE STRENGTH OF PALM KERNEL SHELL CONCRETE USING DIFFERENT TYPES OF CURING METHOD

ABSTRACT This study investigates the impact of varying additive percentages (0%, 5%, 10%, 15%, and 20%) on the compressive strength, density, and overall performance of concrete. Comprehensive tests, including slump tests, water absorption tests, and compressive strength measurements, were conducted on concrete samples cured for 7, 21, and 28 days. The slump test results indicate that the workability of concrete decreases as the additive percentage increases, transitioning from zero slump to true slump at higher additive concentrations. The compressive strength tests reveal a clear trend of strength enhancement with increasing additive percentages. After 28 days, the highest compressive strength of 27.45 N/mm² was achieved with a 20% additive concentration, representing significant improvement compared to the control (17.11 N/mm²). Density measurements also showed a consistent increase, correlating with improved structural integrity. The findings demonstrate that additives positively influence the cohesion and load-bearing capacity of concrete, with the 20% additive concentration yielding the most significant improvements. This study concludes that incorporating up to 20% additive enhances concrete's performance, making it suitable for high-strength structural applications. Recommendations include further research into long-term durability, cost-benefit analyses, and exploring alternative additives for optimization.