Soil Properties of Residual Soil mixed with Agricultural Waste Ashes

Abstract

Agricultural waste ashes have been investigated worldwide by researchers for their ability to be used as an additive in soil stabilization process. To improve the stability of problematic soil, thus ensuring their long term performance especially in foundation purposes is usually a challenge. This paper describes the effect of palm oil fuel ash (POFA) and rice husk ash (RHA) combined with ordinary Portland cement (OPC) as additives to improve the strength properties of residual soil. Results show an improvement in physical and strength properties of stabilized soils for both additives compared to the original residual soil. The optimum condition for both additives is 10% for each mixture with fix 10% OPC.