On the basis of a series of laboratory tests on Nanning unsaturated remodelled expansive soil using stress-controlled direct shear instrument, the paper discusses non-linear rheological characteristics of the expansive soil. The results show attenuation creep for the soil under the stress level below 25.5kPa; while obvious non-linear accelerating creeps are measured under the stress level over 25.5kPa. It also indicates that the higher the moisture contents, the more significant the rheological characteristics of soil present; the greater the vertical stress, the faster the deformation rates o...
