The unsaturated soil mechanics has been studied extensively in the past few decades. Determining the shear strength properties requires direct pore-air and pore-water pressure measurements. However, pore pressures of unsaturated soil can only be measured at advanced geotechnical laboratories with specialty setups. The confined undrained triaxial compression (CUTC) test without pore pressure measurement, a simpler test that can be done at most geotechnical laboratories, was used in this study. Regina clay samples were prepared at three moisture contents (22%, 26%, and 30%) and compacted using the same effort. Three confining pressures (10, 50, and 100 kPa) and three strain rates (0.0084%, 0.084%, and 0.84% per minute) were tested. The moisture contents of 22% and 26% samples had comparable results because the optimum water content (26%) samples had lower initial void ratios after compaction. The moisture content of 30% samples had the lowest strengths. For samples with the same moisture content, the undrained shear strength was positively related to confining pressure and strain rate. A methodology was developed to estimate the pore pressure parameters in CUTC tests without pore pressure measurements. Simplified deviator stress versus isotropic confining pressure relationship was derived and assumed to be linear in the stress ranges examined. The sensitivity of the pore pressure parameters to each input variable was analyzed. The tangent pore-air and pore-water pressure parameters for uniaxial loading (Da and Dw) were sensitive to matric suction, the angle of shear strength change rate related to matric suction, and the effective angle of internal friction. Da and Dw were less sensitive to effective cohesion and the ratio of pore-air and pore-water pressure parameters. The tangent pore-air and pore-water pressure parameters related to isotropic loading (Ba and Bw) were sensitive to Da, Dw, and effective angle of internal friction. Ba and Bw were also sensitive to each other. The pore pressure parameters were used to back-calculate the pore pressures and the effective stress during the test. Using CUTC tests without pore pressure measurements with estimations of pore pressure parameters was deemed a feasible method to estimate unsaturated soil properties.