Application of the polyurethane foam recycling product as an asphalt extender for sustainable road construction

Polyurethane foam (PUF) is widely used across industries owing to its excellent properties, but it has caused a solid waste stream in the environment. Alcoholysis has been found to be an effective and eco-friendly approach to address this issue. However, substantial by-products are generated in the alcoholysis process, presenting challenges to waste PUF recycling. The by-products of the PUF recycling process (BPF) exhibit similar physical properties to asphalt binder. Therefore, this study uses BPF as an asphalt extender to prepare BPF-asphalt, focusing on its influence on asphalt binder properties. The results show that BPF can greatly maintain or even improve the performance of asphalt binder with good compatibility and workability through physical mixing. The optimum amount is 10 % of the mass of the base asphalt binder. Differences in chemical composition lead to differences in BPF-asphalt properties. Thermal polymerization of polystyrene with small molecular weight in BPF plays an important role in improving the high-temperature performance and fatigue resistance. The presence of diethylene glycol has a negative effect on the performance of BPF-asphalt. This study demonstrates the feasibility of the solution of BPF as an asphalt extender to alleviate the disposal pressure of waste PUF and the consumption of asphalt resources.

• Record URL:
  • https://doi.org/10.1016/j.conbuildmat.2024.137879
• Record URL:
  • http://www.sciencedirect.com/science/article/pii/S0950061824030216
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/09500618
• Supplemental Notes:
  • © 2024 Elsevier Ltd. All rights are reserved, including those for text and data mining, AI training, and similar technologies. Abstract reprinted with permission of Elsevier.
• Authors:
  • Lin, Jiao
  • Liu, Junfu
  • Shangguan, Jiaqi
  • 0009-0002-1215-4827
  • Fan, Zepeng
  • Wang, Dawei
  • Liang, Dong
• Publication Date: 2024-9-20

Language

• English

Media Info

• Media Type: Web
• Features: References;
• Pagination: 137879
• Serial:
  • Construction and Building Materials
  • Volume: 444
  • Issue Number: 0
  • Publisher: Elsevier
  • ISSN: 0950-0618
  • Serial URL: http://www.sciencedirect.com/science/journal/09500618?sdc=1

Subject/Index Terms

• TRT Terms: Asphalt additives; Extenders; Polyurethane foams; Waste products (Materials)
• Subject Areas: Highways; Materials; Pavements;

Filing Info

• Accession Number: 01929941
• Record Type: Publication
• Files: TRIS
• Created Date: Sep 10 2024 5:03PM