长期老化条件下沥青混凝土抗裂性能评价

IF 4.3 Q2 TRANSPORTATION

International Journal of Transportation Science and Technology Pub Date : 2023-09-01 DOI:10.55228/jtst.12(5).8-14

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引用次数: 0

摘要

开裂是沥青路面在交通荷载和气候作用下的主要病害之一。沥青在生产、运输、施工、开发等过程中，沥青粘结剂老化会引起沥青开裂。因此，研究老化对沥青混凝土抗裂性能的影响是十分必要的。本文初步评价了标称最大骨料粒径为12.5mm (ac12.5)的沥青混凝土在长期老化条件下的抗裂性能。在室内试验的基础上，考虑长期老化条件，对60/70粘结剂、PMBIII粘结剂和AC 12.5粘结剂所需的技术参数进行了评价。试验结果表明，沥青粘结剂的老化对沥青混凝土的抗裂性能有显著影响。

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Evaluation of cracking resistance of asphalt concrete under long-term aging condition

Cracking is one of the primary distresses in asphalt pavements under traffic loading and climate. Asphalt cracking can be caused by aging asphalt binders in production, transportation, construction, and exploitation. Therefore, it is very necessary to study the influence of aging on cracking resistance for asphalt concrete. This paper initially evaluated the cracking resistance of asphalt concrete with a nominal maximum aggregate size of 12.5mm (AC 12.5) under long-term aging conditions. Based on the laboratory experiments, the study evaluated the required technical parameters of 60/70 binder, PMBIII binder, and AC 12.5 considering long-term aging conditions. Test results indicated that the aging of asphalt binder can significantly affect the cracking resistance of asphalt concrete.

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