软黏土的比表面积测试与机理探讨  

Investigation on Test and Mechanism of Specific Surface Area of Soft Clay

作　　者：梁健伟[1] 曾锐碧[1] 

机构地区：[1]中国能源建设集团广东省电力设计研究院有限公司,广州510663

出　　处：《南方能源建设》2016年第4期102-106,112,共6页Southern Energy Construction

摘　　要：软黏土主要由粒径极细的颗粒组成,其物理力学特性与颗粒比表面积有密切联系,测试软黏土的比表面积有助于分析其物理力学特性。基于乙二醇乙醚(EGME)吸附法和氮吸附(BET)法分别对膨润土、高岭土、石英、长石及其混合物、深圳土、科威特土等软黏土的比表面积进行了测试。测试结果表明:矿物类型对比表面积影响极大,深圳土比表面积小于科威特土,EGME法与BET法能够分别测出试样的总比表面积与外比表面积,给出的比表面积测试对了解影响软黏土的物理力学特性的物理机制具有重要的参考意义。Soft clay is mainly composed of tiny-particle. Its physical and mechanical properties are closely related to specific surface area （ SSA for short）. Therefore, SSA test of soft clay is helpful for analyzing its physical and mechanical properties. EGME method and BET method are adopted to carry tests on bentonite, kaolinite, quartz, feldspar and their mixtures, Shenzhen soil and Kuwait soil. The results show that the mineral type has great influence on SSA; the SSA of Shenzhen soil is smaller than Kuwait soil; total and external SSA of samples can be measured respectively by EGME and BET method. The SSA tests in this paper possess great reference significance for understanding of physical mechanism that influences the physical and mechanical properties in soft clay.

关 键 词：软黏土 乙二醇乙醚吸附法 氮吸附法 比表面积 

分 类 号：TU442[建筑科学—岩土工程]