Test on strength of unsaturated remolded expansive soils

The tri-axial tests of unsaturated remolded Guangxi expansive soils were performed for different dry densities and controlled suction.The relation of the hardening,softening,dilation and compaction features of Guangxi remolded expansive soils with the pore structure was studied.The results showed that the stress-strain curves were those of hardening type and the volume strains were dilation for low dry density soil sample because the pore size was large with good connectivity for low density samples.The hardening type of stress-strain curves would transfer to the softening type when the dry density of soil samples increased.The relationship between suction strength and suction was a hyperbolic feature.