This study aims to predict healing of bitumen with alien strain method. Strain-controlled fatigue load in healing test was decomposed into three alien loads with different start times and rotational directions. Results show that healing prediction can be obtained by superimposing crack lengths induced by the first and second alien strain loads. The reliability of healing prediction is validated by healing tests with rest durations of 1 min, 5 min, 10 min, and 20 min of four different types of bitumen. This healing prediction provides an approach to remove erroneous data measured in healing test, which yields a more accurate characterisation of healing performance.

本研究旨在通过外来应变方法预测沥青的愈合。在康复测试中，将应变控制的疲劳载荷分解为三个具有不同开始时间和旋转方向的外来载荷。结果表明，可以通过叠加由第一和第二外来应变载荷引起的裂纹长度来获得愈合预测。通过四种不同类型沥青的静息时间分别为1分钟，5分钟，10分钟和20分钟的愈合测试，可以验证愈合预测的可靠性。此恢复预测提供了一种方法，可以删除在恢复测试中测得的错误数据，从而可以更准确地表征恢复性能。