A specimen is prepared by compacting a test soil into a metal ring at a degree of saturation of 50 6 2 %. The specimen and the ring are then placed in a consolidometer. A vertical confining pressure of 6.9 kPa (1 lbf/in.2) is applied to the specimen and the specimen is then inundated with distilled water. The deformation of the specimen is recorded for 24 h or until the rate of deformation becomes less than 0.005 mm/h (0.0002 in./h), whichever occurs first. A minimum recording time of 3 h is required.
4" diameter x 1" high (starts 2" high)
clays; expansive soils; index tests; laboratory tests; soil