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.

• Record URL:
  https://ncst.ucdavis.edu/project/investigation-aging-mechanism-and-performance-asphalt-mix-containing-crumb-rubber-modifier

Language

• English

Project

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

  DOT 69A3551747114

• Sponsor Organizations:

  National Center for Sustainable Transportation

  University of California, Davis
  Davis, CA  United States 

  Office of the Assistant Secretary for Research and Technology

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

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

Subject/Index Terms

• TRT Terms: Aging (Materials); Asphalt additives; Asphalt mixtures; Crumb rubber; Fatigue (Mechanics); Pavement components; Pavement cracking; Pavement design; Recycled materials; Rutting
• Subject Areas: Construction; Design; Highways; Materials; Pavements;

Filing Info

• Accession Number: 01730531
• Record Type: Research project
• Source Agency: National Center for Sustainable Transportation
• Contract Numbers: DOT 69A3551747114
• Files: UTC, RIP
• Created Date: Feb 4 2020 2:11PM