The mechanical behavior of epoxy asphalt mixture under cyclic loading

2nd International Workshop on Materials Science and Mechanical Engineering

机械制造;材料科学

Zhang, Z.^1 ; Chen, Z.D.^1 ; Guo, L.H.^2 ; Niu, X.F.^3 ; Xue, P.T.^2 ; Zhang, S.J.^2

Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang'An University, Xi'an

710064, China^1

Highway Administration Bureau of Henan Communications and Transportation Department, Zhengzhou

450000, China^2

Xuchang Huajie Highway Survey and Design Co. Ltd., Xuchang

461000, China^3

关键词: Confining pressures;    Cyclic loading test;    Cylindrical samples;    Elastic plastic property;    Epoxy asphalt mixtures;    Loading-unloading tests;    Mechanical behavior;    Permanent deformations;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/504/1/012017/pdf
DOI  :  10.1088/1757-899X/504/1/012017

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

In order to investigate the mechanical behavior of epoxy asphalt mixture under cyclic traffic loading, cylindrical samples of the epoxy asphalt mixture were subjected to cyclic loading-unloading tests under varying confining pressures. The accumulation and dissipation of energy were observed in the energy evolutions. It turns out that the epoxy asphalt mixture exhibits elastic-plastic property in the first few cycles, and then the elastic property would be strengthened gradually in the cyclic loading tests. Applying a moderate confining pressure would significantly reduce the dissipated energy. The proportion of dissipated energy is about 25% from the unconfined test, and less than 15% from the confined test. As a result, more energy would be required if to produce equal permanent deformation under higher confining pressures. Therefore, a moderate increase in the confining pressure would be helpful in restraining permanent deformation, such as rutting.