Abstract
This paper presents results of a study on the effects of high temperature (up to 90°C) on undrained shear characteristics of clay in both normally consolidated (NC) and overconsolidated (OC) states. The study is based on isotropically consolidated undrained triaxial tests carried out using a temperature controlled triaxial apparatus. Several sequences of heating and consolidation were used to gain insight into the effects of temperature on clay. The study reveals that : (1) in NC state, both the initial secant modulus and the shear strength increase with increasing temperature, and (2) in OC state, only the initial secant modulus increases with a temperature rise, but the shear strength is not affected by heating. This paper further explains these experiment results in terms of micro-resistance and macro-resistance of the clay structure.
