A specimen of clay in a special consolidation device (with drainage at the top only) has a height of 2.065 cm when fully consolidated under a pressure of 65 kPa. A pressure transducer is located at the base of the sample to measure the pore water pressure.
(a) When another stress increment of 65 kPa is applied, what would you expect the initial reading on the transducer to be?
(b) If, after 20 min has elapsed, the transducer records a pressure of 30 kPa, what would you expect it to read 45 min later (total elapsed time of 1.25 h)? (After G.A. Leonards)