废橡胶和废塑料在沥青结合料中作为多功能添加剂的增值应用。

Value-Added Application of Waste Rubber and Waste Plastic in Asphalt Binder as a Multifunctional Additive.

作者信息

Ling Tianqing, Lu Ya, Zhang Zeyu, Li Chuanqiang, Oeser Markus

机构信息

School of Architecture and Urban planning, Chongqing Jiaotong University, Chongqing 400074, China.

School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China.

出版信息

Materials (Basel). 2019 Apr 18;12(8):1280. doi: 10.3390/ma12081280.

DOI:10.3390/ma12081280

PMID:31003521

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6515260/

Abstract

The feasibility and effectivity of recycling waste rubber and waste plastic (WRP) into asphalt binder as a waste treatment approach has been documented. However, directly blending WRP with asphalt binder brings secondary environmental pollution. Recent research has shown that the addition of WRP into asphalt binder may potentially improve the workability of asphalt binder without significantly compromising its mechanical properties. This study evaluates the feasibility of using the additives derived from WRP as a multifunctional additive which improves both the workability and mechanical properties of asphalt binder. For this purpose, WRP-derived additives were prepared in laboratory. Then, three empirical characteristics-viscosity, rutting factor, fatigue life were analyzed. Fourier transform infrared spectroscopy (FTIR) and differential scanning calorimetry (DSC) were employed to evaluate the effect of WRP-derived additive on the workability and chemical and mechanical properties of base binder. The dispersity of WRP-derived additive inside asphalt binder was also characterized using fluorescence microscope (FM). Results from this study showed that adding WRP-derived additive increases the workability of base binder. The WRP-derived additive appears positive on the high- and low- temperature performance as well as the fatigue life of base binder. The distribution of the WRP-derived additive inside base binder was uniform. In addition, the modification mechanism of WRP-derived additive was also proposed in this paper.

摘要

将废旧橡胶和废旧塑料（WRP）回收制成沥青结合料作为一种废物处理方法的可行性和有效性已有文献记载。然而，直接将WRP与沥青结合料混合会带来二次环境污染。最近的研究表明，在沥青结合料中添加WRP可能会提高沥青结合料的可加工性，而不会显著损害其力学性能。本研究评估了使用源自WRP的添加剂作为多功能添加剂的可行性，该添加剂可同时提高沥青结合料的可加工性和力学性能。为此，在实验室制备了源自WRP的添加剂。然后，分析了三个经验特性——粘度、车辙因子、疲劳寿命。采用傅里叶变换红外光谱（FTIR）和差示扫描量热法（DSC）来评估源自WRP的添加剂对基础结合料的可加工性以及化学和力学性能的影响。还使用荧光显微镜（FM）对源自WRP的添加剂在沥青结合料内部的分散性进行了表征。本研究结果表明，添加源自WRP的添加剂可提高基础结合料的可加工性。源自WRP的添加剂对基础结合料的高温和低温性能以及疲劳寿命似乎有积极影响。源自WRP的添加剂在基础结合料内部的分布是均匀的。此外，本文还提出了源自WRP的添加剂的改性机理。