Experimental study on unconfined compressive strength of clays stabilized with fly ash and slag

The experimental results on unconfined compressive strength (UCS) of the clays stabilized with industrial wastes such as fly ash and slag were presented. Three kinds of the compound clays were produced with different proportions of fly ash, clay, sand, mud and slag, and then the compound clays were reinforced by cement, lime, and their combination respectively. The experimental results obtained from the laboratory tests show that the compound clays with fly ash can be best reinforced by cement instead of lime or combination of cement and lime. The relationship among UCS, curing time and cement content has been verified by the laboratory test results in this study. For the compound clays with slag, lime is the most suitable stabilizing agent, and the optimal lime content is around 15% in weight for the soil stabilization in Wuhan areas.