%A Zhechao WANG,Xinyu WANG,Changfu WEI,Wei LI,Guangping DUAN,Shuai LI,Chunyu ZHANG %T The effect of hydrochemical conditions on compression characteristics of kaolinite %0 Journal Article %D 2018 %J Journal of Shandong University(Engineering Science) %R 10.6040/j.issn.1672-3961.0.2017.442 %P 109-117 %V 48 %N 5 %U {http://gxbwk.njournal.sdu.edu.cn/CN/abstract/article_1765.shtml} %8 2018-10-01 %X

In order to investigate the compression characteristics of kaolinite in various hydrochemical conditions, oedometer tests on kaolinite specimens saturated with acidic, alkaline and saline solutions were performed. The results indicated that Na+ and Ca2+ induced the compressibility of specimens significantly in low pressure level, while the increase of ion concentration made a growing trend in the compressibility of kaolinite; in the same concentration, the effect of Ca2+ on the compressibility of specimens was more obvious than Na+; in acidic or alkaline conditions, the compressibility of kaolinite was improved; hydrochemical condition also had effect on the rebound curve. Then the mechanism of the test was analyzed and it was considered that the effect of variation in hydrochemical conditions on compressibility of kaolinite included both mechanical model and physical-chemical model. Cation exchange and adsorption, dissolution and sedimentation were important influential factors of the compressibility of soil. The basis was provided for further revealing the mechanical mechanism of water-soil chemical interaction.