Stability of Repurposed Plastics in Asphalt Binder

Five types of waste plastic streams were investigated for their compatibility with a PG 64-22 asphalt binder. The waste plastics included high-density polyethylene (HDPE) pails; low-density polyethylene (LDPE) food packaging waste; polypropylene (PP) from various waste sources, such as plastic cups, medicine bottles, blackboards, and whiteboards; polystyrene (PS) from food packaging; and plastic number 7 from various sources, including polycarbonate, CD cases, and polycarbonate fibers. The plastics were characterized using Fourier-transform infrared spectroscopy (FTIR). Thermogravimetric analysis was performed to optimize the blending. Storage stability of waste plastic–modified binders was evaluated using the cigar tube test (CTT). Rheological and multiple stress creep recovery (MSCR) tests were performed for predicting rutting and cracking potential. No significant chemical changes were noticed when plastics were added to the binder. However, some of the waste plastic–modified binders appeared to be unstable. The rheological properties of waste plastic–modified binder vary with respect to unmodified binder; most plastics exhibited degradation. The MSCR test showed no improvement in the elasticity of the nonrecoverable strain for tested waste plastic–modified binders. This suggests that wet mixing of waste plastic with binder could be ineffective in some cases.

• Record URL:
  • https://doi.org/10.1061/9780784484906.006
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/9780784484906
• Supplemental Notes:
  • © 2023 American Society of Civil Engineers.
• Corporate Authors:

  American Society of Civil Engineers

  1801 Alexander Bell Drive
  Reston, VA  United States  20191-4400
• Authors:
  • Alhadidi, Yusra I
  • Al-Qadi, Imad L
  • García Mainieri, Javier J
  • Sharma, Brajendra K
  • Rajagopalan, Nandakishore
• Conference:
  • International Airfield and Highway Pavements Conference 2023
  • Location: Austin Texas, United States
  • Date: 2023-7-14 to 2023-7-17
• Publication Date: 2023

Language

• English

Media Info

• Media Type: Web
• Pagination: pp 60-70
• Monograph Title: Airfield and Highway Pavements 2023: Innovation and Sustainability in Airfield and Highway Pavements Technology

Subject/Index Terms

• TRT Terms: Asphalt pavements; Bituminous binders; Plastics; Recycled materials; Wastes
• Subject Areas: Highways; Materials; Pavements;

Filing Info

• Accession Number: 01902685
• Record Type: Publication
• ISBN: 9780784484906
• Files: TRIS, ASCE
• Created Date: Dec 19 2023 5:05PM