Interlaminar Mechanical Properties of Cement Concrete Pavement Structures with Isolation Layer

被引:3
作者
Hu, Liwei [1 ]
Yao, Jialiang [2 ,3 ]
Wang, Zhenquan [4 ]
机构
[1] Hunan Commun Engn Polytech, Sch Rd & Bridge, Engn Coll, Changsha 410132, Hunan, Peoples R China
[2] Changsha Univ Sci & Technol, Sch Traff & Transportat Engn, Changsha 410114, Hunan, Peoples R China
[3] Minist Transport Changsha, Key Lab Rd Struct & Mat, Changsha 410114, Hunan, Peoples R China
[4] Qianxiang Wanhe Community, Zhengzhou Transportat Planning Survey & Design In, Zhengzhou 450001, Henan, Peoples R China
基金
中国国家自然科学基金;
关键词
Semi-rigid base; Cement concrete pavement surface; Waxed isolation layer; Cohesive force; Internal friction angle; Interlaminar mechanical analysis; RIGID PAVEMENT; PREDICTION;
D O I
10.1061/(ASCE)CF.1943-5509.0001668
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
To reduce the reflection cracking and interlayer bonding degree of cement concrete pavement, an isolation layer was set up between the water-stabilized base layer and the cement surface layer. Finite-element analysis was used to analyze the mechanical properties of the cement concrete pavement structure and the wax isolation layer. By changing the cohesive strength and internal friction angle of interlaminar structures, the effects of different friction coefficients on the pavement deflection, the maximum tensile stress of surface course, the maximum interlaminar shear stress, and the maximum tensile stress of base course were analyzed. Results showed that when the internal friction angle was 0 degrees, the maximum tensile stress of surface course of cement concrete in the upper warpage state was 4.6 times of that in the lower warpage state; the change of internal friction angle had more influence on the concrete stress than did the change of cohesive force; and the internal friction angle needs to be controlled at 30 degrees to 50 degrees when the cohesion is less than 0.01 MPa. The mechanical property parameters of cement concrete pavement were obtained, which could provide a scientific basis for the pavement structure design with wax isolation layer.
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页数:8
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