岩土力学Issue(10)：2823-2830,8.
总磷对黏土物理力学性质影响的试验研究
Experimental study of the effect of total phosphorus on physico-mechanical performance of clays
摘要
Abstract
In order to find the effect of total phosphorus on physico-mechanical performance of clay, samples have been tested with deionized water and total phosphorus solution with different concentrations in laboratory, and the interaction mechanisms of clays and total phosphorus are revealed by mineral and microscopic analysis. The results make clear that the total phosphorus has significant influences on physico-mechanical performance of clay: the plasticity indices of samples decrease with the increasing concentration of total phosphorus solution, the effective cohesive strength increases and then decreases, and the effective friction angle increases with the increasing concentration;the strain hardening phenomenon appears in the stress-strain relationships, and the variation of stress-strain curve of samples soaks in deionized water and total phosphorus solution is almost the same. The peak shear strength of samples manifests as a trend of increase and then it decreases with the increasing concentration of total phosphorus solution. The mineral composition, microstructure and physico-mechanical performance of clays are affected by the interaction between total phosphorus and clays, including ion exchange, cementation, microbial decomposition as well as the dielectric constant and viscosity of pore solutions.关键词
总磷/物理力学性能/矿物成分/微观结构/机制Key words
total phosphorus/physico-mechanical performance/mineral composition/microstructure/mechanism分类
建筑与水利引用本文复制引用
伍艳,任海平,王玮屏,兰雁,沈细中..总磷对黏土物理力学性质影响的试验研究[J].岩土力学,2014,(10):2823-2830,8.基金项目
国家自然科学基金(No.51309114)；“十二五”国家科技支撑计划(No.2013BAC05B01)。 （No.51309114）
