A Study of characteristic of critical state on unsaturated soil

Abstract

    A series of CW triaxial tests was carried out on statically compacted silt. The results from this study show that the critical state lines at different matric suctions on the (q - p) plane were parallel with a slope of 1.28 for the CW triaxial tests, indicating the unique relationship between deviator stress and mean net stress. The results also indicate the unique relationship between the specific volume, v, and mean net stress, p, on the (v - p) plane for both the CW triaxial tests. The slope of the critical state lines on the (v - p) plane for the CW triaxial tests decreased with the increase in matric suction.