Expansive soils are problematic by virtue of their inherent capacity to undergo volumetric changes corresponding to changes in moisture content. These soils undergo alternate swelling and shrinkage in rainy seasons and summers and cause severe damage to lightly loaded civil engineering structures. It is necessary to identify these soils based on their degree of expansion. Direct measurement of swell potential and swelling pressure and their indirect correlation with index properties like liquid limit, plasticity index, activity, shrinkage index and free swell index (FSI) are...