长江科学院院报2017，Vol.34Issue(7)：99-105,7.DOI:10.11988/ckyyb.20160328
废旧轮胎橡胶颗粒与黏土混合土的剪切特性
Shearing Properties of Composite Soil Mixing Claywith Rubber Particle of Scrap Tire
摘要
Abstract
The shear properties of composite soil mixing clay with rubber particle of scrap are investigated by using direct shear apparatus Shear Trac-II.Effects of the scrap rubber particle contents and particle size on the shear strength of composite soil are analyzed.The relationships between shear strength indexes and rubber particle contents or particle sizes are established.Besides, compaction properties of composite soil are studied by light compaction tests.Results indicate that maximum dry densities and optimum water contents of composite soil decrease gradually with the increase of rubber particle contents.However, the reduction tendency significantly decreases when rubber particle content exceeds 15%.When rubber particle content is 40%, shear strength of composite soil reaches the highest increasing by 20%~40% compared with pure clay soil.Furthermore, increasing particle size could significantly enhance the shear strength of composite soil when particle contents are less than 20%.Additionally, cohesion of composite soil increases firstly and then decreases with the increase of particle contents, whereas internal friction angle increases gradually.During the shearing process, soil sample exhibits a property of shear shrinkage at first and then shear dilation.And shear dilation is obvious for composite soil mixed with large size particle in low vertical pressures.关键词
废旧轮胎橡胶颗粒/黏土/混合土/橡胶颗粒掺量/压实特性/抗剪强度Key words
rubber particle of scrap tire/clay/composite soil/rubber particle content/compaction characteristics/shear strength分类
建筑与水利引用本文复制引用
李珊珊,李大勇..废旧轮胎橡胶颗粒与黏土混合土的剪切特性[J].长江科学院院报,2017,34(7):99-105,7.基金项目
国家自然科学基金项目(51379118) （51379118）
山东科技大学科研创新团队资助项目(2015TDJH104) （2015TDJH104）
山东科技大学研究生创新项目(SDKDYC170324) （SDKDYC170324）
