Study on Deformation Characteristics and Mechanism of Q3 Loess Microstructrue Before and After Wetting
Abstract Microstructure characteristics of loess is an effective way to study the physical and mechanical characteristics of soil under different conditions. Water content in sample of Q3 loess is about 25% ,which was first subjected to X-Ray test to determine the main chemical components in loess and calculated the proportion in the sample. Test analysis shows the particle structure of the loess belonged to the granular structure type. CT scanning tests were performed on the sample before and after wetting. The changes of total number of pores, the maximum pore volume and the position of the centroid of pore of the sample were analyzed before and after wetting. The results shows that the soluble salts of loess have been dissolved after wetting.The volume of the pores of loess have been changed. Some increased, some decreased and others closed in volume. The change of the number of pores indicates that the sample formed obvious saturated zone, transition zone, conduction zone and humid zones after wetting. These results reveals the deformation characteristics and mechanism of Q3 loess microstructure.