Use of Recycled Plastics in Asphalt Pavement Year 2

Over the last few years, there has been increasing interest in using recycled plastics in asphalt pavements. Recent studies have suggested that recycling plastics in asphalt mixtures is a great opportunity to improve the performance of pavements while eliminating the growing amount of waste plastics being landfilled or polluting the environment through litter. The goal of this study is to conduct a preliminary laboratorial investigation to explore the viability of using recycled plastics in asphalt in the state of Missouri. During the first phase of the project, the effects of high-density polyethylene (HDPE) on a typical Missouri asphalt binder PG 64-22 was investigated. 5% of HDPE (with or without pretreatment; flake or ground) by weight of neat binder was introduced into asphalt binder through wet process. Preliminary results indicated the size of recycled plastic flakes had significant effects on some properties of asphalt binders. The addition of HDPE greatly improved the rutting resistance of asphalt binders, and the binder modified with pretreated HDPE powders (with one physical treatment used in this study) has exhibited reasonable storage stability. The next phase of the project will aim to further investigate the methods to increase the compatibilization of waste plastics with asphalt and thus enhance mechanical properties of modified asphalt cement. The tests on binders with other plastics (e.g., polyethylene terephthalate (PET) and low-density polyethylene (LDPE)) as well as the mixture performance tests (i.e., semi-circular bending (SCB), Hamburg wheel tracking (HWT), and indirect tension (IDT) tests) will be conducted to evaluate the effects of different recycled plastics on the properties/performances of asphalt binders/mixtures. The results of this study are expected to identify whether recycled plastics can be successfully incorporated into asphalt with improved properties/performance. The issues resulted from the asphalt binders/mixtures modified by recycled plastics will also be identified.

Project

  • Status: Active
  • Funding: $134944
  • Contract Numbers:

    69A3551947137

  • Sponsor Organizations:

    Transportation Infrastructure Durability & Life Extension

    Washington State University
    Civil & Environmental Engineering
    Pullman, Washington  United States  99164

    Missouri University of Science & Technology, Rolla

    Department of Engineering
    202 University Center
    Rolla, MO    65409

    Office of the Assistant Secretary for Research and Technology

    University Transportation Centers Program
    Department of Transportation
    Washington, DC  United States  20590
  • Managing Organizations:

    Transportation Infrastructure Durability & Life Extension

    Washington State University
    Department of Civil & Environmental Engineering
    Pulman, Washington  United States  99163
  • Project Managers:

    Kline, Robin

  • Performing Organizations:

    Missouri University of Science & Technology, Rolla

    Department of Engineering
    202 University Center
    Rolla, MO    65409
  • Principal Investigators:

    Liu, Jenny

    Liang, Xinhua

  • Start Date: 20210701
  • Expected Completion Date: 20220630
  • Actual Completion Date: 20220630
  • USDOT Program: University Transportation Centers
  • Subprogram: Transportation Infrastructure Durability & Life Etension

Subject/Index Terms

Filing Info

  • Accession Number: 01773721
  • Record Type: Research project
  • Source Agency: National Center for Transportation Infrastructure Durability and Life-Extension
  • Contract Numbers: 69A3551947137
  • Files: UTC, RIP
  • Created Date: Jun 4 2021 12:51PM