The self-healing ability of asphalt material has a significant effect on improving fatigue life of asphalt pavement. The objective of this paper was to investigate the stage characteristics of fatigue damage of asphalt binder and its associated self-healing behaviours. Firstly, the rheological behaviour and fracture surface morphology were discussed to investigate the fatigue evolution characteristics of asphalt binders. Secondly, an effective method for interpreting the self-healing capability of asphalt binder at different fatigue stages was proposed by conducting fatigue-healing-refatigue tests and Fourier transform infrared spectroscopy analysis. Finally, the effect of temperature on the self-healing properties of different aging asphalt binders at different fatigue damage stages was explored. The results show that the stage characteristics of fatigue damage of asphalt binders could be distinguished effectively by correlating complex shear modulus with ratio of dissipation energy change under load time history. The fatigue cracking morphologies of asphalt binders under cyclic shear loading are susceptible to the aging degree of asphalt binder. An index associated with initial dissipative energy and number of cycles could effectively evaluate the self-healing properties of different aging asphalt binders. After the occurrence of macrocracks, the mechanical properties of asphalt binder cannot be completely restored by increasing the temperature.

沥青材料的自愈能力对改善沥青路面的疲劳寿命具有重要作用。本文的目的是研究沥青粘合剂疲劳损伤的阶段特征及其相关的自愈性能。首先，讨论了流变行为和断裂表面形态，以研究沥青粘合剂的疲劳演化特征。其次，通过进行疲劳修复-疲劳试验和傅立叶变换红外光谱分析，提出了一种有效的方法来解释沥青在不同疲劳阶段的自修复能力。最后，探讨了温度对不同老化损伤阶段不同老化沥青粘结剂自愈性能的影响。结果表明，在载荷作用下，通过将复数剪切模量与耗散能量变化比相关联，可以有效地区分沥青胶结料疲劳损伤的阶段特征。循环剪切载荷作用下沥青胶结料的疲劳开裂形态易受沥青胶料老化程度的影响。与初始耗散能和循环次数相关的指数可以有效地评估不同老化沥青粘结剂的自愈性能。发生大裂纹后，温度升高不能完全恢复沥青粘合剂的机械性能。循环剪切载荷作用下沥青胶结料的疲劳开裂形态易受沥青胶结料老化程度的影响。与初始耗散能和循环次数相关的指数可以有效地评估不同老化沥青粘结剂的自愈性能。发生大裂纹后，温度升高无法完全恢复沥青粘合剂的机械性能。循环剪切载荷作用下沥青胶结料的疲劳开裂形态易受沥青胶料老化程度的影响。与初始耗散能和循环次数相关的指数可以有效地评估不同老化沥青粘合剂的自愈性能。发生大裂纹后，温度升高不能完全恢复沥青粘合剂的机械性能。