One of the most important features of asphalt mixes is their ability to undergo self-healing after certain time intervals. Increasing the temperature can accelerate the healing process. In this study, the heating process will be triggered by using microwave technology when ferrite powders is added in asphalt mixes. Fracture tests were performed on open-graded friction course (OGFC) asphalt and ferrite-filled asphalt mixes under three-point bending with different heating and resting time periods. To examine the improvements in the microwave healing and fracture response of ferrite-filled asphalt mixes, the fracture process zone (FPZ) was characterized and quantified through digital image correlation. The FPZ lengths of the specimen with and without ferrite powder were compared. The asphalt specimens including ferrite powders are proved to have a relative longer FPZ length providing an improved cohesive response and a higher cracking resistance.

沥青混合料的最重要特征之一是它们在一定时间间隔后能够自我修复的能力。提高温度可以加快愈合过程。在这项研究中，当在沥青混合料中添加铁素体粉末时，将通过使用微波技术来触发加热过程。在具有不同加热和静止时间段的三点弯曲下，对开放级摩擦过程（OGFC）沥青和铁氧体填充沥青混合料进行了断裂测试。为了检查铁素体填充沥青混合料在微波愈合和断裂响应方面的改进，通过数字图像相关对断裂过程区（FPZ）进行了表征和量化。比较了有和没有铁素体粉末的样品的FPZ长度。