Constant void ratio vs. constant confining pressure tests on partially saturated silty soil

The presence of soil solids, water, and air complicates understanding unsaturated dynamics. A thorough behavior is essential for the fruitful design slopes, embankments, retaining structures. series constant void ratio confining pressure triaxial compression tests were carried out under water content conditions (pore drained pore undrained) to study shear strength deformation characteristics a partially saturated silty soil. Test specimens prepared with 15%, 20% (Optimum content), 25%, corresponding degree saturation 37, 49, 62.5%. compaction all was kept at 83% while dry density 1.29 g/cm3, around 1.045. All samples isotropically consolidated 500kPa by keeping deviatoric stress 0kPa. test results showed that reached peak value followed sudden decrease within axial strain 0-1.5%. In contrast, increased continuously until reaching critical state without depicting any tests. However, in both cases, lower time specimen preparation, higher resistance.