Research on fracture performance of epoxy asphalt concrete based on double-K fracture criterion

5th Global Conference on Materials Science and Engineering

Zhang, M.^1 ; Qian, Z.D.^1 ; Xue, Y.C.^1

Intelligent Transport System Research Center, Southeast University, Nanjing, Jiangsu, China^1

关键词: Crack mouth opening displacement;    Double K fracture parameters;    Fracture criteria;    Fracture performance;    Sampling frequencies;    Single edge notched beams;    Temperature decrease;    Three-point bending test;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/164/1/012011/pdf
DOI  :  10.1088/1757-899X/164/1/012011

来源: IOP

【 摘 要 】

After cracks appear on steel bridge deck epoxy asphalt concrete pavement, cracks propagate fast under vehicle load. This paper studied the fracture performance of epoxy asphalt concrete, utilized single edge notched beam (SEB) three-point bending test, measured the load (P) exerted on epoxy asphalt SEB; utilized digital camera to record the fracture process of epoxy asphalt SEB, extracted the images according to the required sampling frequency and utilized Image-Pro Plus to measure the crack mouth opening displacement (CMOD) of epoxy asphalt SEB on the extracted images; calculated the double-K fracture parameters according to the P-CMOD curve. Results indicate that Kiniicof epoxy asphalt concrete is 1.11 MPa √ m and Kunicof epoxy asphalt concrete is 2.31 MPa √ m at -15°C Kiniicof epoxy asphalt concrete is 1.02 MPa √ m and Kunicof epoxy asphalt concrete is 1.83 MPa √ m at -5°C; Kiniicof epoxy asphalt concrete is 0.77 MPa √ m and Kunicof epoxy asphalt concrete is 1.82 MPa √ m at 5°C. The double-K fracture parameters of epoxy asphalt concrete increase slightly when the temperature decreases at the scope of -15°C to 5°C. The relation of Kiniic, Kicand Kunicis Kiniicicunic.