Viscous Property of Kaolin Clay With and Without Ageing Effects by Cement-Mixing in Drained Triaxial Compression.

The viscous property of kaolin and the ageing effect on its stress-strain behaviour as well as their interactions were evaluated by performing a series of drained triaxial compression (TC) tests on air-dried and saturated specimen with and without cement-mixing. The axial strain rate was changed stepwise many times as well as drained creep and relaxation tests were performed during otherwise monotonic loading (ML). Different types of viscous properties (called Isotach type as well as weak and strong TESRA types) were observed depending on test conditions. The ageing effects by hydration of cement, interacted with the viscous property, were observed with saturated cement-mixed kaolin. It is shown that the effects of viscosity property and ageing, which interact with each other, can be simulated by a non-linear three-component rheology model modified from the original one to account for ageing effects. [ABSTRACT FROM AUTHOR]