Investigation into the Aging Mechanism and Performance of Asphalt Mix Containing Crumb Rubber Modifier

Crumb rubber modifier (CRM) produced from waste tire rubbers has been introduced into pavement engineering to modify the asphalt mixes for more than half a century. The motivation also comes from its environmental benefits from recycling scrap tires. Adding CRM into asphalt binder changes the binder microstructure and leads to a modification of the binder properties, resulting in binder aging resistance improvement. This positive result is apparent while its mechanism is still unknown. Building on the knowledge that modification of the asphalt binder alters the pavement in-service performances, it is worthwhile to study the CRM asphalt aging process from the binder phase to the mix phase, and to clarify the rubber influence on the asphalt mix performances. This study aims to investigate asphalt binder and mix aging mechanism, especially for the asphalt containing crumb rubber modifier, and evaluate the aging effects on the asphalt mix performances. This study also aims to further evaluate the performance of the asphalt mix containing crumb rubber modifier, including the rutting resistance, fatigue life, and thermal cracking resistance.

Language

  • English

Project

  • Status: Active
  • Funding: $30000
  • Contract Numbers:

    69A3551747114

  • Sponsor Organizations:

    Office of the Assistant Secretary for Research and Technology

    University Transportation Centers Program
    Department of Transportation
    Washington, DC  United States  20590

    National Center for Sustainable Transportation

    University of California, Davis
    Davis, CA  United States 

    University of California, Davis

    Institute of Transportation Studies
    Davis, CA  United States  95616
  • Managing Organizations:

    National Center for Sustainable Transportation

    University of California, Davis
    Davis, CA  United States 

    University of California, Davis

    Institute of Transportation Studies
    Davis, CA  United States  95616
  • Project Managers:

    Iacobucci, Lauren

  • Performing Organizations:

    National Center for Sustainable Transportation

    University of California, Davis
    Davis, CA  United States 

    University of California, Davis

    Institute of Transportation Studies
    Davis, CA  United States  95616
  • Principal Investigators:

    Liang, Yanlong

    Harvey, John

  • Start Date: 20190915
  • Expected Completion Date: 20200930
  • Actual Completion Date: 0
  • USDOT Program: University Transportation Centers

Subject/Index Terms

Filing Info

  • Accession Number: 01716139
  • Record Type: Research project
  • Source Agency: National Center for Sustainable Transportation
  • Contract Numbers: 69A3551747114
  • Files: UTC, RiP
  • Created Date: Sep 13 2019 2:55PM