Utilization of ashes from oil-palm wastes as a cement replacement material
This study examines the engineering feasibility of utilizing the ashes derived from oil-palm fruit bunches, shell and fiber wastes as a cement replacement material. The experimental results indicate that blended cement containing ash derived from oil-palm wastes shows satisfactory setting times and soundness. Workability of concrete incorporating the ash is categorized as good, and no segregation was observed. The effects of ash addition on concrete density and water absorption are insignificant. Compressive strength of the concrete decreases with the ash content in the cement. At up to 10% by weight of shell-fiber ash addition, no adverse effect on strength was observed for the concrete cubes. The results suggest that the ash could possibly be blended in small amounts with ordinary Portland cement for concrete making.