石膏易溶盐复合对黄土力学性能的影响研究  

The Effect of Gypsum Soluble Salt Compound on the Mechanical Properties of Loess

作　　者：崔自治[1] 寇小娜[1] 周伟红[1] 杨宁宁[1] 

机构地区：[1]宁夏大学土木与水利工程学院,银川750021

出　　处：《科学技术与工程》2015年第14期200-204,共5页Science Technology and Engineering

基　　金：教育部"长江学者和创新团队发展计划"创新团队项目(IRT1067)资助

摘　　要：为了探索石膏与易溶盐复合对黄土强度的作用规律,分别以易溶盐Ca Cl2、Na2SO4和石膏含量为因素,设计L9(34)正交试验方案,应用全自动三轴仪进行了石膏易溶盐复合对黄土力学性能的影响研究。结果表明:黄土的强度随石膏含量的增大而增大,随易溶盐含量的增大而减小;石膏和易溶盐对黄土强度的影响均为极显著水平,显著性顺序为Ca Cl2>Na2SO4>石膏。石膏与易溶盐复合,石膏增强了易溶盐的作用效应,易溶盐则使石膏对黄土的强度的贡献有所降低。In order to explore the action principle of gypsum and soluble salt compound to loess strength,taking soluble salt（CaCl2,Na2SO4） and gypsum content as factors,orthogonal experimental scheme L9（34） is carried out to study the effect of gypsum and soluble salt compound on the mechanical properties of loess by application of automatic triaxial apparatus.The results show that： the strength of loess increases with the increase of gypsum content,and decreases with the increase of soluble salt.The effects of gypsum and soluble salt on the strength of loess are both extremely significant level.The significant order is CaCl2〉 Na2SO4 〉gypsum.When gypsum and soluble salt are compounded,gypsum enhances the effect of soluble salt,and soluble salt makes the contribution of gypsum to the loess strength decreased.

关 键 词：黄土 强度 石膏 易溶盐 

分 类 号：TU432[建筑科学—岩土工程]