Triaxial tests for typical Winnipeg clays

Abstract

Presented in this thesis are the results of a series of Triaxial tests run on undisturbed samples of a highly plastic Winnipeg clay. The shear strength properties, pore pressure characteristics and the effect of the strain rate were investigated and compared with the available information. The results indicate the presence of a low angle of shearing resistance and a high cohesion intercept. The nature of the pore pressure change due to applied deviator stress indicates Winnipeg clays as being lightly over-consolidated. The rate of strain is seen to influence the test results in the consolidated undrained tests. For reliable results in such a test a strain rate with a time to failure of four to six hours or more appears satisfactory.