In recent years, the proliferation of plastic waste has become a global problem. A potential option to this problem is the dry process, which incorporates plastic waste into asphalt mixtures. However, the dry process often has inconsistent performance because of the improper distribution of plastic waste particles in the mixture skeleton. This inconsistency may be caused by a wrong mixing method, shredding size, mixing temperature and ingredient priorities. Thus, this study aims to improve the consistency of the dry process by comparing the control asphalt mixture and two plastic waste-modified asphalt mixtures prepared using the dry process. Quantitative sieving analysis and performance tests were carried out to examine the effects of plastic waste added into the asphalt mixture. The volumetric and performance properties combined with image analysis of the modified mixtures were obtained and compared with the control mixture. In addition, the moisture damage, resilient modulus, creep deformation and rutting were evaluated. This study also highlighted in detail the distribution of plastic particles in the final skeleton of the asphalt mixture. Based on the analysis, an enhanced dry process of mixing procedure was proposed and evaluated. Results showed that the addition of plastic particles using the conventional dry process contributed a significant effect on the aggregate gradation of the produced mixture when a high plastic content was used. Furthermore, the enhanced dry process developed in this study presents substantial enhancement in the asphalt performance, particularly with plastic waste that accounts for 20% of the weight of the asphalt binder.

中文翻译：

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改性沥青含塑料废料的强化干法处理

近年来，塑料垃圾泛滥已成为全球性问题。这个问题的一个潜在选择是干法，它将塑料废物加入沥青混合物中。然而，由于塑料废料颗粒在混合物骨架中的分布不当，干法工艺往往性能不一致。这种不一致可能是由错误的混合方法、粉碎尺寸、混合温度和成分优先级引起的。因此，本研究旨在通过比较对照沥青混合料和使用干法制备的两种塑料垃圾改性沥青混合料来提高干法的一致性。进行了定量筛分分析和性能测试，以检查添加到沥青混合料中的塑料废物的影响。获得了体积和性能特性以及改性混合物的图像分析，并与对照混合物进行了比较。此外，还评估了湿损、弹性模量、蠕变变形和车辙。该研究还详细强调了沥青混合料最终骨架中塑料颗粒的分布。在此分析的基础上，提出并评估了一种增强型干法混合工艺。结果表明，当使用高塑料含量时，使用传统干法添加塑料颗粒对所生产混合物的骨料级配有显着影响。此外，本研究中开发的增强型干法显着提高了沥青性能，