Effect of particle size distribution on the metric suction of unsaturated clayey soils

Particle size distribution(PSD)is one of the factors influencing variation of metric suction occurred in unsaturated soils.Effect of PSD on the metric suction of unsaturated clayey soils was investigated in this paper based on soil water characteristic curves(SWCC)obtained in laboratory.PSD’s such effect was described using its various correlations with the parameters of SWCC.It was found that PSD has strong influence on residual water content of the unsaturated soils.Specifically,residual water...