Recycled Asphalt Binder Study

Recycled materials may detrimentally affect the fatigue and thermal cracking resistance of Hot Mix Asphalt (HMA) if used improperly. New technologies have enabled HMA mixture designers to compensate for some of the negative aspects of recycled asphalt materials (RAM) and provide high performing mixtures with increased concentrations of RAM. In addition, the use of RAM in HMA is favorable due to the decrease in cost, increase in rutting resistance of pavement, and reduction of emissions when green processes are used. However, reasonable limits on content and quality of RAM binder for Wisconsin environments and practices are not fully understood. The Wisconsin Department of Transportation (WisDOT) maximum allowable binder replacement for fresh asphalt binder is 40% in lower pavement layers and 25% in upper layers. It is also widely accepted that recycled asphalt pavement (RAP)blending in the range of 20-30% by total weight of mix has minimal effects on the long-term pavement performance. The asphalt content of recycled components directly contributes to percent asphalt binder replacement for various quantities of RAM as a percentage of total weight of mix. This research aims to test typical binder replacement limits and better understand blending of RAM and fresh binder for Wisconsin environments and practices.

Language

• English

Project

• Status: Active
• Funding: $200000
• Contract Numbers:

  0092-19-04

• Sponsor Organizations:

  Wisconsin Department of Transportation

  4802 Sheboygan Avenue
  Madison, WI  United States  53707
• Project Managers:

  Lyngdal, Erik

• Performing Organizations:

  National Center for Asphalt Technology

  277 Technology Pkwy
  Auburn, AL  United States  36830
• Principal Investigators:

  Rodezno, Carolina

• Start Date: 20181001
• Expected Completion Date: 20210201
• Actual Completion Date: 0

Subject/Index Terms

• TRT Terms: Asphalt; Binders; Hot mix asphalt; Recycled materials
• Subject Areas: Highways; Maintenance and Preservation; Materials; Pavements;

Filing Info

• Accession Number: 01696708
• Record Type: Research project
• Source Agency: Wisconsin Department of Transportation
• Contract Numbers: 0092-19-04
• Files: RIP, STATEDOT
• Created Date: Feb 28 2019 12:24PM