One-dimensional loading-unloading tests were carried out on Nanning expansive soils respectively by means of consolidometer, and the stress-strain relationship were obtained in this paper. The results of the experiment show that the primary is instantaneous deformation ; under same loading rate, the deformation speed reaches the maximum and then the speed decreases with time quickly. Finally, some of deformation could not be restored still when it is unloaded. The plastic and rheological properties are more and more obvious when the moisture content or stress is increased. The deformation is c...
