金属离子对粘土土工性状影响的实验  

Test on geotechnical characteristics of clay influenced by metal cation

作　　者：徐慧[1] 李文平[1] 曹丽文[1] 

机构地区：[1]中国矿业大学资源学院,江苏徐州221008

出　　处：《煤田地质与勘探》2009年第3期57-60,共4页Coal Geology & Exploration

基　　金：国家自然科学基金项目(40572160)

摘　　要：在正交实验设计的基础上,通过大量的室内实验,对粘土吸附性的影响因素加以分析,为金属离子影响下的粘土土工性状研究奠定基础。在粘土吸附性的基础上,对粘土吸附离子后的基本土工特性进行实验研究,得出了粘土土工特性的变化趋势。结果表明:在单离子体系中粘土对离子的吸附量明显大于混合离子体系中对该离子的吸附量;在多离子体系中,则表现为高价离子具有更强的竞争力;粘土的塑性指数基本是随离子含量的增加而增大;粘土强度随着离子总含量的增高而逐渐降低。On the basis of the orthogonal experiment, this paper has analyzed the influencing factors of the adsorption of clay via laboratory batch tests, which provides a base for the investigations on cation adsorption of clay. After the batch tests, geotechnical characteristics of cation-contaminated clay are studied. We get the changing trend of the geotechnical characteristics. It is found that the cation adsorption capacity of clay in the single cation liquor is higher than in the multi cation liquor; the higher valence cation has stronger competition in the multi cation liquor; the plasticity index of clay increases with cation content and the strength of clay reduces progressively with the total cation content.

关 键 词：粘土吸附性 金属离子 粘土 土工性状 

分 类 号：TU411[建筑科学—岩土工程]