Performance characterization of asphalt mixtures under different aging levels: A fracture-based method

Predicting the Effect of the Loading Rate on the Fracture Toughness of Hydraulic Asphalt Concrete Based on the Weibull Distribution

“…Compared with the trabecular bending test, not only is the specimen preparation simple and has strong applicability, but also the permanent deformation of the contact point between the semicircular specimen and the support is smaller [7], which reduces the influence of external causes on the test results. With the deepening of the research, Fu Xin et al [8] clarified the influence of the mechanical properties of SCB specimens on the test parameters such as thickness, spacing of supports, width and depth of incision, etc., and obtained the appropriate dimensional parameters through numerical simulation; Xiong Aiming [9], Feng Decheng [10], and Jiang Xinlong [6] et al calculated a variety of fracture indexes based on SCB test results to evaluate the low-temperature cracking resistance of asphalt mixture, and compared the sensitivity of each fracture index under different test conditions; Zhu Hongzhou et al [11] pointed out that temperature and time can improve the self-healing ability of asphalt mixture using the fracture-healing-fracture test on SCB specimens, but the higher the temperature and the longer the time, the better the healing ability; N. Shahryari et al [12] compared the effect of three specimen geometries, SCB, Edge Notched Disc Bending (ENDB), and Edge Notched Disc Compression (ENDC), on the Type I fracture behavior of modified and unmodified mixes; other scholars [13,14] have investigated the cracking characteristics of asphalt mixtures with different aging methods using the SCB test. On the other hand, hydraulic asphalt concrete belongs to viscoelastic-plastic materials, and the loading rate becomes sensitive to its comprehensive physico-mechanical properties.…”