Predictions of the non-homogeneous behaviour of clay in the triaxial test

In the triaxial soil test cylindrical soil samples are subjected to controlled axial strain through rigid end platens and also controlled radial stress through a rubber membrane. The author examines the case of fully drained tests on clay specimens and, in particular, what constitutes a sufficiently slow rate of straining to approximate to the fully drained condition. Non-homogeneous behaviour of the triaxial specimen may result from the migration of pore water through the specimen and perhaps across its boundaries during testing. Some of the non-homogeneities occurring in triaxial specimens due to migration of pore water are discussed. (Author/TRRL)