An isotropically consolidated undrained compression (CIUC) Maxiel test was carried out on this clay under an effective consolidation stress of 400 kPa. The clay was normally consolidated under this consolidation stress.
(i) Calculate the undrained shear strength and the pore-water pressure at failure obtained from this CIUC test.
(ii) Sketch schematically the likely effective stress path q – pi and the specific volume versus p’ curves. Plot the CSL and NCL with all the values marked clearly on the same graphs.
(iii) Calculate the effective friction angle obtained from this CIUC test.
(iv) What will be the deviator stress and specific volume at failure if the above test is carried out under a drained condition given the other test conditions the same? What will be the maximum dilatancy ratio obtained from this test?
(v) If the above CIUC test is carried out by firstly consolidating the soil specimen under 400 kPa and then under 100 kPa before the undrained shearing, what would be the c value obtained from this test?