A NC clay has an effective friction angle of 28o and zero effective cohesion. A CU test conducted on the clay gave the following results:
- Confining stress = 105 kPa.
- Deviator stress at failure = 97 kPa
a) Calculate the pore water pressure developed in the specimen at failure.
b) What would the deviator stress at failure have been if a CD test had been conducted with the same confining pressure (i.e., 105 kPa)?