Hall Finn, White Greg
School of Science, Technology and Engineering, University of the Sunshine Coast, Sippy Downs, QLD 4556, Australia.
Materials (Basel). 2021 Oct 18;14(20):6176. doi: 10.3390/ma14206176.
The push for environmental sustainability in the civil engineering industry has resulted in an increased interest in the use of recycled construction materials, with one example being the use of waste plastic for the modification of bituminous binder in asphalt mixtures. Existing research has associated waste plastics with various binder and asphalt mixture performance enhancing properties. However, there is a lack of research on the age-related durability of waste plastic-modified roads. This research compared the effect of commercially available waste plastic binder modifiers on the ageing phenomenon of bituminous binders and asphalt mixtures, to the effect of conventional polymers SBS and EVA, through artificial bituminous binder and asphalt mixture ageing performed in a laboratory. The addition of polymers (both waste and virgin) resulted in an increase in binder stiffness after short-term ageing as the polymer content increased. The effect of the waste plastic on ageing was comparable to the effects associated with the conventional polymers, and it was concluded that the waste plastic binder modified products should be considered sustainable alternatives to standard polymers for bituminous binder and asphalt mixture modification.
土木工程行业对环境可持续性的推动，使得人们对使用再生建筑材料的兴趣增加，其中一个例子是使用废塑料来改性沥青混合料中的沥青结合料。现有研究已将废塑料与各种增强结合料和沥青混合料性能的特性联系起来。然而，关于废塑料改性道路的与老化相关的耐久性研究却很缺乏。本研究通过在实验室进行的人工沥青结合料和沥青混合料老化试验，比较了市售废塑料结合料改性剂对沥青结合料和沥青混合料老化现象的影响，以及传统聚合物SBS和EVA的影响。随着聚合物含量的增加，添加聚合物（包括废塑料和原生塑料）会导致短期老化后结合料刚度增加。废塑料对老化的影响与传统聚合物的影响相当，得出的结论是，废塑料结合料改性产品应被视为用于沥青结合料和沥青混合料改性的标准聚合物的可持续替代品。
