Effect of Waste Ash on Compressive Strength of Marginal Lateritic Soil Mixed with Cement

Abstract

This research investigated compressive strength of marginal lateritic soil improved by cement and waste ash. Marginal lateritic soil was obtained from borrow pit, Chaloem Phra Kiat District, Nakhon Ratchasima. Waste ash obtained from Waste to Energy Power Plant, Songkhla. Binder (cement:waste ash) contents of 0, 1, 3 and 5,  cement:waste ash ratios of 100:0, 95:5, 90:10, 85:15, 80:20, 75:25 and 70:30 and water content of 0.8OWC, 1.0OWC and 1.2OWC (Optimal Water Content, OWC).  It can be seen that 7-day soaking compressive strength of marginal lateritic soil improved by cement and waste ash increased as waste ash content. The optimum ingredient of marginal lateritic soil improved by cement and waste ash was found at cement:waste ash ratios of 80:20 and water content of 1.0OWC