Effect of aqueous solution chemistry on the swelling of clayey rock

被引：23

作者：

Chai, Zhao-Yun ^{[1
]}

Kang, Tian-He ^{[1
]}

Feng, Guo-Rui ^{[1
]}

机构：

[1] Taiyuan Univ Technol, Inst Min Technol, Taiyuan 030024, Shanxi, Peoples R China

来源：

APPLIED CLAY SCIENCE | 2014年 / 93-94卷

基金：

中国国家自然科学基金; 山西省青年科学基金;

关键词：

Clayey rock; Swelling ratio; Aqueous solution chemistry; SEM-EDS; Swelling anisotropy coefficient; BEHAVIOR; MODEL;

D O I：

10.1016/j.clay.2014.02.027

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Clayey rock has a large clay mineral content. When in contact with aqueous solutions with different chemical properties, the rock expands considerably and presents a significant hazard to the stability of underground excavations. The swelling behaviour of Cenozoic clayey rock from Shandong Province, China, was investigated when subjected to various aqueous chemical solutions, using the free swell test method. The influence of different chemical paths on the swelling of clayey rock was analysed, and the basic mechanisms of the swelling and shrinkage variability of clayey rock were analysed by SEM-EDS. The results demonstrated that the swelling of clayey rock was clearly anisotropic, quantified by the swelling anisotropy coefficient. Swelling was independent of the chemical path, but dependent on the concentration of the aqueous solution. The more concentrated the solution, the weaker the swelling. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：12 / 16

页数：5

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