%0 Journal Article
%A ZHOU Yu
%A CHEN Dong-xia
%A YU Jia-jing
%A LI Qi
%T Test and Micro-mechanism of Disintegration of Granite Residual Soil under Dry-Wet Cycles
%D 2023
%R 10.11988/ckyyb.20210902
%J Journal of Yangtze River Scientific Research Institute
%P 153-160
%V 40
%N 1
%X Granite residual soil is prone to soften and disintegrate in contact with water.The effects of compactness and number of dry-wet cycles on the disintegration characteristics and disintegration indexes of granite residual soil were examined via disintegration test under dry-wet cycles.Results demonstrated that the smaller degree of compaction and the more times of dry-wet cycles,the faster the disintegration and the shorter the time required for the sample to completely disintegrate.The functional relations of average disintegration rate against number of dry-wet cycles and degree of compaction were fitted.The microstructure change of granite residual soil under dry-wet cycle was obtained by scanning electron microscope test.The micro-mechanism of disintegration was explained:with the number of dry-wet cycles increased,the lamellar structure of flake particles was destroyed,the agglomeration of particles was weakened,the plane porosity increased,and the structure tended to loose,which accelerated the disintegration of granite residual soil.
%U http://ckyyb.crsri.cn/EN/10.11988/ckyyb.20210902