Current interest in reusing waste polymer shows substantial benefits of using it as a sustainable polymer in improving asphalt properties, attaining environmental stability and promoting industrial-economic benefits. Waste plastics have a vital role in the current asphalt applications. Trial sections of roads made with waste plastic modified asphalt, during 2019 in Australia, highlighted the significant importance of laboratory assessments yet to be conducted. As such, this study is aimed to investigate the impact of using local waste Polyethylene Terephthalate (PET) plastic in binder class C320, which is a common bitumen type used for local road surfacing in Australia. The evaluation of various contents of PET modified bitumen is carried out through two stages for unaged and aged conditions. Dynamic Shear Rheometer (DSR), Rolling Thin Film Oven (RTFOT) and Pressure Aging Vessel (PAV) tests were utilised to investigate the rutting, fatigue and aging of bitumen binder. The results showed that the ideal content of waste plastic is 6–8% to improve the rutting and aging resistances. Moreover, 8% PET improves the fatigue cracking resistance as it shows a low fatigue factor (G* sin δ). Hence, application of locally-attained plastic in pavements not only reduces the costs but also improve sustainability of environment and natural resources. Further rutting and fatigue tests on asphalt samples are recommended to better understand the mechanical properties of PET plastic on asphalt mixtures with 6–8% PET plastic. In the event that the outcomes demonstrate an enhancement in the properties of the concrete paving mixture, usage of such a material would be extremely compensating in Australia. Also, this would help decrease the amount of waste scrap plastic, in turn, sustaining the environment.

目前对废聚合物再利用的兴趣表明，将其用作可持续聚合物在改善沥青性能、实现环境稳定性和促进工业经济效益方面具有巨大的好处。废塑料在当前的沥青应用中起着至关重要的作用。2019 年在澳大利亚使用废塑料改性沥青制成的道路试验路段突出了尚未进行的实验室评估的重要性。因此，本研究旨在调查使用当地废弃的聚对苯二甲酸乙二醇酯 (PET) 塑料作为粘合剂类别 C320 的影响，C320 是澳大利亚当地道路路面使用的常见沥青类型。PET 改性沥青的各种含量的评估通过未老化和老化条件两个阶段进行。动态剪切流变仪 (DSR)，使用滚动薄膜烘箱 (RTFOT) 和压力老化容器 (PAV) 测试来研究沥青粘合剂的车辙、疲劳和老化。结果表明，理想的废塑料含量为6%~8%，以提高车辙和抗老化性能。此外，8% PET 提高了抗疲劳开裂性，因为它显示出低疲劳因子（G* sin δ）。因此，在人行道上使用当地获得的塑料不仅可以降低成本，还可以提高环境和自然资源的可持续性。建议对沥青样品进行进一步的车辙和疲劳测试，以更好地了解 PET 塑料在含有 6-8% PET 塑料的沥青混合物上的机械性能。如果结果表明混凝土铺路混合物的性能有所提高，在澳大利亚使用这种材料是非常补偿的。此外，这将有助于减少废塑料的数量，进而保护环境。