For the better understanding of fracture test method to evaluate the crack resistance of asphalt mixtures, the current test methods and evaluation indexes were theoretically and experimentally compared, including the indirect tensile test, single edge notch beam test, semicircular bending test (SCB) and disk-shaped compact tension test. The stress intensity factors for different tests were compared, and the appropriate range of notch depth was determined. The SCB was finally selected as the test method for evaluating the crack resistance of the asphalt mixtures. According to the relationship between the fracture energy and notch depths, the essential fracture energy of asphalt mixtures was calculated, and it was recommended as the evaluation index of asphalt mixtures for crack resistance. Furthermore, the failure process of the SCB was analyzed, and the contraflexure point on the load–displacement curve was found and defined. The fracture energy at the contraflexure point could be used to evaluate the ultimate crack resistance of the asphalt mixtures. The application of the essential fracture energy and the contraflexure point can correspond to the actuality of the asphalt pavement, which provides a reference for the crack resistance research of asphalt mixtures in the future.

为了更好地理解断裂试验方法来评估沥青混合料的抗裂性，从理论上和实验上比较了目前的试验方法和评价指标，包括间接拉伸试验，单边缺口梁试验，半圆弯曲试验（SCB）和圆盘试验。形紧凑的拉伸试验。比较了不同测试的应力强度因子，并确定了合适的缺口深度范围。最后，选择SCB作为评估沥青混合料抗裂性的测试方法。根据断裂能与缺口深度之间的关系，计算出沥青混合料的基本断裂能，建议作为沥青混合料抗裂性的评价指标。此外，分析了SCB的故障过程，并找到并定义了载荷-位移曲线上的对折点。对折点处的断裂能可用于评估沥青混合料的极限抗裂性。必要的断裂能和反弯点的应用可以对应于沥青路面的实际情况，为今后沥青混合料的抗裂性研究提供参考。