Mechanical Behavior and Failure Mechanism of Recycled Semi-flexible Pavement Material
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2015年第5期
论文作者：丁庆军 ZHAO Mingyu SHEN Fan ZHANG Xiaoqiang
文章页码：981 - 988
摘 要：The mechanical behavior and failure mechanism of recycled semi-flexible pavement material were investigated by different scales method. The macroscopic mechanical behavior of samples was studied by static and dynamic splitting tensile tests on mechanics testing system（MTS）. The mechanical analysis in micro scale was carried out by material image analysis method and finite element analysis system. The strains of recycled semi-flexible pavement material on samples surface and in each phase materials were obtained. The test results reveal that the performance of recovered asphalt binder was the major determinant on the structural stability of recycled semi-flexible pavement material. The asphalt binder with high viscoelasticity could delay the initial cracking time and reduce the residual strain under cyclic loading conditions. The failure possibility order of each phase in recycled semi-flexible pavement material was asphalt binder, reclaimed aggregate, cement paste and virgin aggregate.
丁庆军1，ZHAO Mingyu1，SHEN Fan2，ZHANG Xiaoqiang3
1. State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology2. School of Materials Science and Engineering, Wuhan Institute of Technology3. School of Transportation, Wuhan University of Technology
摘 要：The mechanical behavior and failure mechanism of recycled semi-flexible pavement material were investigated by different scales method. The macroscopic mechanical behavior of samples was studied by static and dynamic splitting tensile tests on mechanics testing system（MTS）. The mechanical analysis in micro scale was carried out by material image analysis method and finite element analysis system. The strains of recycled semi-flexible pavement material on samples surface and in each phase materials were obtained. The test results reveal that the performance of recovered asphalt binder was the major determinant on the structural stability of recycled semi-flexible pavement material. The asphalt binder with high viscoelasticity could delay the initial cracking time and reduce the residual strain under cyclic loading conditions. The failure possibility order of each phase in recycled semi-flexible pavement material was asphalt binder, reclaimed aggregate, cement paste and virgin aggregate.
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