Parameters affecting soil-water characteristic curves of fine-grained soils

Experiments were conducted to measure the suction of a locally available silty soil and commercially available white clay, using a Dewpoint PotentiaMeter (WP4). The results were used to develop the soil-water characteristic curves (SWCCs), for these soils and evaluating various fitting functions, in high suction ranges. Efforts have also been made to demonstrate the influence of the soil type and dry unit weight on the soil suction. The study brings out the observation that dry unit weight has negligible influence on the soil suction and parameters effecting SWCC