Compatibility investigation of waste plastics in bitumen via a molecular dynamics method-Reference-Cited by-同舟云学术

Compatibility investigation of waste plastics in bitumen via a molecular dynamics method

Published:2023 Issue:12 Volume:31 Page:7224-7243
ISSN:2688-1594
Container-title:Electronic Research Archive
language:
Short-container-title:era

Author:

Yao Hui¹,Li Xin¹,Dan Hancheng²,Dai Qingli³,You Zhanping³

Affiliation:

1. Beijing Key Laboratory of Traffic Engineering, Faculty of Architecture, Civil and Transportation Engineering, Beijing University of Technology, No. 100, Pingleyuan, Chaoyang, Beijing 100124, China

2. School of Civil Engineering, Central South University, Changsha, Hunan 410075, China; Rail Data Research and Application Key Laboratory of Hunan Province, Central South University, Changsha, Hunan 410075, China; Hunan Tieyuan Civil Engineering Testing Co., Ltd., Changsha, Hunan 410075, China

3. Department of Civil and Environmental Engineering, Michigan Technological University, Houghton, MI 49931-1295, USA

Abstract

<abstract> <p>The compatibility between waste plastic polymers and bitumen is the most challenging issue hindering the improvement of modified bitumen performance. The current practice of recycled waste plastics includes the use of polyvinyl chloride (PVC), polypropylene (PP), polyethylene (PE), etc. This study was designed to investigate the compatibility of different waste plastic polymers with bitumen binders by conducting molecular dynamics (MD) simulations at different temperatures. The molecular models of these materials were constructed in this study for the compatibility analysis, and they include the base bitumen, polymers (PVC, PP, and PE), polymer- bitumen blending systems. Using the output and related calculations of these MD models, the properties of these blending systems were measured at different temperatures through the calculation of the solubility parameter (δ) and interaction energies. The compatibility analysis is discussed in the context of these simulation results. The simulation results for the solubility parameters and interaction energies show consistent trends. The results showed that PVC and PP had better compatibility with bitumen at 433.15 K and that PE and bitumen had good compatibility at 393.15 K. Moreover, it can be deduced that the order of compatibility of the three polymers with bitumen is as follows: PVC > PE > PP. In addition, these research results can be referenced for the industry and research development of modified bitumen.</p> </abstract>

Publisher

American Institute of Mathematical Sciences (AIMS)

Subject

General Mathematics

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