Experimental Study on Shear Properties of Interface between Clay and Cement Paste

2019 3rd International Workshop on Renewable Energy and Development

能源学;生态环境科学

Wang, Yibo^1 ; Xia, Xiong^2 ; Wu, Yan^1

Department of Architectural and Environmental Engineering, Changzhou University Huaide College, Jingjiang, JIANGSU

214513, China^1

School of Environmental and Safety Engineering, Changzhou University, Changzhou, Jiangsu

213164, China^2

关键词: Contact surface;    Internal friction angle;    Normal stress;    Optimum moisture content;    Shear properties;    Stress decrease;    Stress increase;    Water-cement ratio;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/267/5/052049/pdf
DOI  :  10.1088/1755-1315/267/5/052049

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

According to the typical clay in Changzhou, the shear properties of interface between cement paste and clay were studied through changing water content of clay and water cement ratio of cement paste. Rules of shear strength, internal friction angle and cohesion of contact surface between cement paste and clay changing with water content were researched. The results show that when the water cement ratio and clay moisture content remain unchanged, the shear stress increases with the increase of normal stress. After reaching a peak value, the shear stress begins to decrease. When water cement ratio and normal stress remain unchanged, the shear stress decreases with the increase of water content. When the water cement ratio is constant, the internal friction angle decreases with the increase of water content. When the water cement ratio is 0.4 and 0.45, the cohesion decreases with the increase of water content. When the water cement ratio is above 0.5, the cohesion increases first and then decreases with the water content. 17% is the optimum moisture content, at this time, the cohesion is the greatest.