This study aims to evaluate the effect of different rejuvenators and antistripping agents on the healing performance of hot mix asphalt (HMA). Two damage HMA series (e.g., moisture damage and aged damage) were subjected to either induction or microwave heating. A PG64-22 virgin and aged binder were used and modified with several additives. Three long-term aged binders (e.g., PAV5, PAV15, and PAV20) were conducted by pressure aging vessel (PAV) test. The moisture damage series fabricating with a new binder was further categorized into four different freeze-thaw (FT) cycles (e.g., 0FT, 1FT, 3FT, and 5FT). Also, the aged series was fabricated with three different aged binders. A total of eight damage-healing cycles were applied to all asphalt mixtures, examined by the three-point bending test. The moisture resistance of modified asphalt mixture was examined by indirect tensile strength test. Overall, asphalt mixtures modified with either antistripping additives or rejuvenators not only obtained higher moisture resistance but also gained better healing performance under moisture damage. In addition, the study showed a probable correlation between moisture damage and long-term aging in terms of healing performance, such as PAV15 and 3FT cycles and PAV20 and 5FT cycles.

中文翻译：

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抗汽提添加剂和嫩化剂对水分损伤的HMA愈合性能的影响

这项研究旨在评估不同的回春剂和防剥离剂对热拌沥青（HMA）愈合性能的影响。对两个损坏的HMA系列（例如湿气损坏和老化损坏）进行感应加热或微波加热。使用PG64-22原始和老化的粘合剂，并用几种添加剂改性。通过压力老化容器（PAV）测试进行了三种长期老化的粘合剂（例如PAV5，PAV15和PAV20）。使用新粘合剂制造的湿气损害系列又被分为四个不同的冻融（FT）循环（例如0FT，1FT，3FT和5FT）。同样，老化系列是用三种不同的老化粘结剂制造的。通过三点弯曲试验检查，对所有沥青混合物总共进行了八个损伤修复循环。通过间接拉伸强度试验检查改性沥青混合物的耐湿性。总体而言，用防剥离添加剂或再生剂改性的沥青混合料不仅获得了更高的耐湿性，而且在受到水分破坏的情况下获得了更好的愈合性能。此外，该研究表明，就愈合性能而言，如PAV15和3FT周期以及PAV20和5FT周期，水分损伤与长期衰老之间可能存在关联。