Innovative application of waste polyethylene terephthalate (PET) derived additive as an antistripping agent for asphalt mixture: Experimental investigation and molecular dynamics simulation

FUEL

卷:300

Article

Li, Rui¹  Leng, Zhen¹  Yang, Jun³  Lu, Guoyang¹  Huang, Man²  Lan, Jingting¹  Zhang, Hongliang²  Bai, Yawei⁴  Dong, Zejiao⁵ 

[1] Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hong Kong, Peoples R China

[2] Changan Univ, Minist Educ, Key Lab Special Area Highway Engn, Xian, Peoples R China

[3] Southeast Univ, Sch Transportat, Nanjing, Peoples R China

[4] Henan Prov Highway Management Ctr Toll & Loan, Zhengzhou, Peoples R China

[5] Harbin Inst Technol, Sch Transportat Sci & Engn, Harbin, Peoples R China

关键词: Polyethylene terephthalate (PET);    Moisture damage;    Adhesion;    Antistripping;    Molecular dynamics simulation;    Acknowledgment The authors would like to acknowledge the insightful discussions about molecular dynamics simulation with Dr;    Yangming Gao from Aston University in UK and Dr;    Chi Zhang from ETH in Switzerland;   

DOI  :  10.1016/j.fuel.2021.121015

来源: Elsevier

【 摘 要 】

Moisture-induced damage represents one of the major challenges to the durability of asphalt pavement, which may lead to various premature distresses, such as cracking, ravelling and potholes. To reduce the moistureinduced damages, antistripping agents have been commonly used in asphalt mixtures. On the other hand, the fast-growing waste polyethylene terephthalate (PET) from the end-of-life plastic products poses a serious problem to the environment. How to recycle and reuse the waste PET is becoming a major concern. This study aims to develop a value-added recycling approach of reusing waste PET as an antistripping agent for asphalt mixture. To achieve this objective, waste PET was first collected and went through an aminolysis reaction to yield the amine-based PET additive, which was used to modify bitumen. The infrared spectrum of the PET additive was then characterized, followed by the evaluation of moisture susceptibility through the boiling test and indirect tensile strength (ITS) test. In addition, molecular dynamics (MD) simulation was conducted to analyze the effect of the PET additive on the density and the cohesive energy density (CED) of the binder, and the interface bonding between binder and aggregate at the molecular level. The results from both experiments and MD simulation consistently indicate that the waste PET derived additive can effectively increase the resistance to moistureinduced damage of asphalt mixture.

【 授权许可】

Free