soil water characteristic curve for a residual granite soil

Soil-water characteristic curve (swcc) is one of the important keys for estimating the behavior of unsaturated soils. this study aimed to establish the swcc of the residual granite soil in the laboratory. therefore, a modified oedometer based on the axis translation technique successfully employed to perform various experiments in unsaturated conditions. soil water characteristic curve (swcc) for a residual granite soil at different densities was then established based on results obtained from experiments using the oedometer. results showed a good trend between the experimental and numerical methods, verifying the established swcc. finally, an empirical equation was established to describe the relationship of the granite soil water characteristic curve (gswcc) as it fitted well with the experimental results.