Influence of particle breakage on the isotropic compressibility of sands

作     者：YU Fang-wei SU Li-jun PENG Xiong-zhi 

作者机构：Institute of Mountain Hazards and EnvironmentChinese Academy of SciencesChengdu610299China Center for Excellence in Tibetan Plateau Earth SciencesChinese Academy of SciencesBeijing100101China China-Pakistan Joint Research Center on Earth SciencesIslamabad45320Pakistan University of Chinese Academy of SciencesBeijing100049China Department of Civil EngineeringThe University of TokyoTokyo113-8656Japan Department of Civil EngineeringSouthwest Jiaotong UniversityChengdu610031China 

出 版 物：《Journal of Mountain Science》 (山地科学学报（英文）)

年 卷 期：2022年第19卷第7期

页      面：2086-2099页

核心收录：

学科分类：09[农学] 0903[农学-农业资源与环境] 090301[农学-土壤学] 

基　　金：supported by the National Natural Science Foundation of China(Grant no.41807268) the Youth Innovation Promotion Association of the Chinese Academy of Sciences-China(Grant no.2018408) 

主　　题：Compression Isotropic consolidation Particle breakage Rebound Sands Triaxial tests 

摘      要：Particle breakage is a theme of great focus on affecting the behavior of granular *** paper presents an experimental investigation on the influence of particle breakage on the isotropic compressibility of the precrushed sands using a number of drained isotropic consolidation *** breakage resulted in movement of the compression lines followed by the rebound lines towards a decrease in the void ratio,implying that particle breakage caused a more contractive *** breakage impaired the bulk deformation modulus by increasing the compression coefficient for the compression behavior of the precrushed sands,but showed a complex effect on the bulk deformation modulus and rebound coefficient for the rebound behavior of the precrushed ***,particle breakage caused an increase in the compression indexes of the precrushed sands but showed a complex effect on the rebound indexes of the precrushed *** the e-p’plane and the e-logp’plane,the compression lines and rebound lines of the precrushed sands were curved.A generalized model was proposed to straighten the compression and rebound lines of the precrushed sands in the e-(p’p_(a))^(α) *** breakage resulted in a general rotation and translation of the linear compression and rebound lines of the precrushed sands in the e-(p’p_(a))^(α)*** critical state line and isotropic consolidation line on the loosest state of silica sand no.5 were curved in the e-logp’plane but straightened in the e-p’^(α=0.7) *** the e-p’^(α=0.7 )plane,a reasonable linear critical state line of silica sand no.5 was proposed by adjusting it to match the isotropic consolidation line on the loosest state.