Sample of clay isotropically normally compressed to an all round effective pressure of 100 kPa and then allowed to swell back to an effective isotropic pressure of 50 kPa. The sample is then subjected to a standard drained compression test. What is the deviator stress at failure and what is the volumetric strain experienced by the sample at failure? The second sample is subjected to a standard undrained compression test. What are the deviator stress and pore pressure at failure, if there is initially back pressure of 50kPa? Assume that the soil has the following critical state properties: M = 0.95, λ = 0.093, k = 0.035, T = 2.06 and N = 2.118

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Test for Determination of Shear Strength

The term shear strength is often associated with the soil. Shear strength is defined as the resistance to the deformation of soil particles due to the continuous action of shear stress. In short, shear strength is the maximum shear stress that a soil can sustain.