In this study, fracture energy and fracture toughness are used to investigate the fracture behaviour of Asphalt Concrete Composites (ACC) in pure mode I and III using Edge Notch Disc Bend (ENDB) geometry at temperatures of −18°C and +25°C. Also, polyester fibre (PE) and calcium lignosulfonate (CL) additives were used separately and simultaneously to improve the performance of ACC's fracture. In order to evaluate the brittleness of the ACC, Flexibility Index (FI), Toughness Index (TI), and Cracking Resistance Index (CRI) were evaluated. The results showed that the top-down cracking potential due to the pure mode III loading condition for the base sample was higher than the opening cracking at −18°C due to lower fracture toughness and fracture energy of pure mode III than pure mode I. At +25°C, the ACC cracking potential was based on the results of fracture toughness and fracture energy for top-down cracking and opening cracking, respectively.

在这项研究中，断裂能和断裂韧性用于研究沥青混凝土复合材料 (ACC) 在纯模式 I 和 III 中使用边缘凹口圆盘弯曲 (ENDB) 几何形状在 -18°C 和 +25°C 温度下的断裂行为. 此外，聚酯纤维（PE）和木质素磺酸钙（CL）添加剂分别同时使用以改善ACC的断裂性能。为了评估 ACC 的脆性，评估了柔韧性指数 (FI)、韧性指数 (TI) 和抗裂指数 (CRI)。结果表明，由于纯模式 III 的断裂韧性和断裂能低于纯模式 I，因此基础样品在纯模式 III 加载条件下的自上而下开裂潜力高于 -18°C 时的开裂。在 +25°C 时，