The results of two drained tri axial tests on a saturated clay are recorded as follows:
Specimen A: Chamber-confining pressure = 104 kPa Deviator stress at failure = 210 kPa
Specimen B:
Chamber-confining pressure = 170 kPa Deviator stress at failure = 324 kPa
1 Compute the angle of friction.
2 Compute the cohesion of soil.
3 If the clay specimen above is tested in a tri axial apparatus with a chamber- confining pressure of 248 kPa, compute the major principal stress at failure.