APPROACHES FOR RIGID PAVEMENT AFTER STABILIZING WITH LIME ON EXPANSIVE SOIL

Civil engineering faces critical issue in projects due to ineffective properties of soils. In certain cases, improve the characteristic of unsuitable soil is a fundamental step for making construction. Pavement structures on poor soil sub grades show early suffering causing the early failure of the pavement. Clayey soil usually has low bearing capacity, high shrinkage and swell characteristics and high moisture susceptibility. In this study, experimental program was carrying out to study the effect caused by the action of lime on the geotechnical characteristics of expansive subgrade soils. Expansive soil treated with varying percentages of lime, 0, 3, 6, 9, and 12 percent were studied. Consistency limits, compaction, California Bearing Ratio & free swell index were conducted. It was found that the optimum dosage of lime at 12% mixed with soil in significant improvement in strength and durability and reduction in swelling and plasticity properties of the soil. Based on the results, it is recommended that lime admixture be considered a viable option for the stabilization of expansive subgrades.