Mechanical Stabilization of Subgrade Using Sand–Cement Mixture

An attempt to stabilize the black cotton soil (BCS) using locally available sand with cement mixture has been presented in this study. The soil in the western part of the India is predominated by the black cotton soil which causes lot of problems for the road construction. Replacement with well-graded borrow soil for subgrade is not economical solutions for the road construction. In India, several road constructions have been proposed on this problematic terrain. For this purpose, different proportion of sand–cement mixture has been used to improve the engineering properties of the BCS. The mixture of 60% sand and 2% cement resulted in increase in the CBR value by about 120% as compared to the lime-stabilized BCS.