Rafiq Waqas, Bin Napiah Madzlan, Hartadi Sutanto Muslich, Salah Alaloul Wesam, Nadia Binti Zabri Zarisha, Imran Khan Muhammad, Ali Musarat Muhammad
Department of Civil and Environment Engineering, Universiti Teknologi PETRONAS, Perak 32610, Malaysia.
Department of Civil Engineering, COMSATS University Islamabad, Wah Cantt 47040, Pakistan.
Materials (Basel). 2020 Oct 22;13(21):4704. doi: 10.3390/ma13214704.
Moisture damage in hot mix asphalt pavements is a periodic but persistent problem nowadays, even though laboratory testing is performed to identify different moisture-susceptible mixtures. In this study, a Hamburg Wheel Tracking device (HWTD) was used for rutting tests which were conducted on control and a high percentage of recycled asphalt pavement (RAP), i.e., 30%, 50% and 100% of virgin mixtures, under air dry and water-immersed conditions. Similarly, the extracted bitumen from RAP was tested for binder physical properties. Results showed that the asphalt mixtures containing RAP have less rut depth as compared to the control mix both in air dry and immersion conditions and hence showed better anti-rutting properties and moisture stability. Stripping performance of control and RAP containing mixtures was also checked, concluding that the RAP mixture was greatly dependent on the interaction between the binder (virgin plus aged) and aggregates.
尽管会进行实验室测试以识别不同的易受潮混合料，但如今热拌沥青路面的水分损害仍是一个周期性且持续存在的问题。在本研究中，使用汉堡轮辙试验机（HWTD）进行车辙试验，试验在风干和水浸条件下对对照组以及高比例再生沥青路面（RAP），即分别占原始混合料30%、50%和100%的情况进行。同样，对从RAP中提取的沥青进行了粘结剂物理性能测试。结果表明，无论是在风干还是浸水条件下，含RAP的沥青混合料与对照混合料相比车辙深度更小，因此表现出更好的抗车辙性能和水分稳定性。还检查了对照组和含RAP混合料的剥落性能，得出结论：RAP混合料在很大程度上取决于粘结剂（原始粘结剂加老化粘结剂）与集料之间的相互作用。
