Question

A clay soil sample is tested in a triaxial apparatus in consolidated – drained conditions at a cell pressure of 100 kN/m². What will be the pore water pressure at a deviator stress of 40 kN/m²?

Answer 1

Correct Answer - Option 1 : 0

In the consolidated drained test, the soil sample is first consolidated under an appropriate cell pressure. With the cell pressure kept at the same value, the soil sample is then sheared by applying the deviator stress so slowly that excess pore water pressure does not develop during the test. Thus, at any stage of the test, the total stress are the effective stress.