Expansive clays are problematic deposits to civil engineering constructions as these deposits exhibit swelling and shrinkage during wet and dry seasons respectively. Therefore stabilization of expansive clay is of interest to engineers who deal with this soil. Among various stabilizing agents addition of lime with clay is considered more effective. The research work on California Bearing Ratio (CBR) of lime stabilized soil cured at various curing conditions are limited. Towards this, an attempt is made in this study, to bring out the effect of curing conditions and lime contents on CBR of lime stabilized clayey soil. In the present study, a black cotton soil, classified as clay of high plasticity (CH) is used. For the stabilization of soil, laboratory grade hydrated lime was used. The soil is stabilized with 3%, 5% and 7% lime contents and the specimens were cured at 30˚C and 40˚C for 7, 14 and 28 days prior to testing. The results of California Bearing Ratio test brought out the fact that the as the lime content, curing temperature and curing period increases, CBR value increased. The rate of improvement in CBR was higher upto CBR value of about 50% and beyond that the rate of gain was lesser.
Keywords : Expansive Clay, Lime Stabilization, California Bearing Ratio.