%0 Journal Article
%A PAN Jian-feng
%A LEI Xue-wen
%A MENG Qing-shan
%A QIN Dong-lai
%A FU Jin-xin
%T Effect of Coarse-grain Content on Shear Properties of Coral Reef-Sand Mixtures
%D 2023
%R 10.11988/ckyyb.20211280
%J Journal of Yangtze River Scientific Research Institute
%P 118-124
%V 40
%N 5
%X Coral reef-sand mixture is an important supporting layer of infrastructure. To investigate the effect of particle gradation composition on shear strength and dilatation of coral reef-sand mixtures, simple shear tests were performed using fully automatic medium-sized stacked ring direct shear instrument. The tests were conducted on samples with varied <i>P<sub>5</sub></i> content and water content under four different normal stresses of 50, 100, 200, and 400 kPa. The experimental results show that the shear strength of coral reef-sand mixtures first increases and then decreases with the increase of <i>P<sub>5</sub></i> content. The shear strength reaches its maximum when <i>P<sub>5</sub></i> content is 25%-50%. In the shearing process, coral reef-sand mixtures contracted first and then dilated. <i>P<sub>5</sub></i> content has a significant effect on dilatation, internal friction angle, and apparent cohesion. Water content weakens the shear strength of coral reef sand mixture.
%U http://ckyyb.crsri.cn/EN/10.11988/ckyyb.20211280