黏土矿物及粉粒对昔格达组粉质黏土可塑性的影响  

INFLUENCE OF CLAY MINERALS AND SILT ON PLASTICITY OF XIGEDA FORMATION SILTY CLAY

作　　者：徐宗恒[1] 徐则民[1] 孟庆会 张家明[1] 

机构地区：[1]昆明理工大学建筑工程学院土木系,昆明650500 [2]云南省建筑工程设计院,昆明650041

出　　处：《工业建筑》2012年第8期79-83,共5页Industrial Construction

基　　金：国家自然科学基金-云南联合基金重点项目(U1033601);交通部西部科技项目(200831876723)

摘　　要：结合西昌钒钛钢铁新基地所揭露的昔格达组粉质黏土的矿物组成及颗粒级配,通过验证性试验及前人研究成果,对黏土矿物及土体的颗粒级配对昔格达组粉质黏土塑性指数的影响进行分析。结果表明:黏土矿物及高粉粒含量是影响昔格达组粉质黏土可塑性的主要因素,高粉粒含量对昔格达组粉质黏土可塑性的影响比粉质黏土中黏土矿物种类及含量对其可塑性的影响大。但粉粒含量对黏性土体的塑性指数的贡献值具有一定范围,一般介于6～10。According to clay mineral composition and particle size distribution of Xigeda formation silty claystone exposed in Vanadium and Titanium-Iron and Steel Base in Xichang, influence of soil particle size distribution and clay minerals on the plasticity index of Xigeda Sity Clay was discussed. Qualitative analysis by verification experiment and other＇ s researches also were done. The results showed that the clay minerals and high silt content in Xigeda Silty Clay influenced greatly on its plasticity index. The influence of silt content on plasticity of Xigeda was greater than that of clay minerals and clay content on plasticity index. The contribution to plasticity index value of silt content had a certain range, usually between 6 - 10.

关 键 词：黏土矿物 塑性指数 粉粒 昔格达组 

分 类 号：P642.139[天文地球—工程地质学]