Characterizing and Improving Binder Availability and Activity in Asphalt Mixtures with Reclaimed Asphalt Pavement (RAP)

The majority of asphalt mixtures produced in Virginia contain reclaimed asphalt pavement (RAP) due to the associated economic benefits, resulting in environmental advantages. Presently, there is uncertainty regarding the degree of availability and activity of RAP binder. This uncertainty impacts the design and performance of mixtures with RAP contents of 25% and above by the total weight of mixtures. Furthermore, a recent research effort was completed to evaluate the short- and long-term effectiveness of recycling agents (RAs) in improving the performance of asphalt mixtures, especially those with relatively high RAP contents. This research effort will consist of three major phases. Phase I will aim to validate the two performance-based engineered frameworks developed and recommended as part of Virginia Transportation Research Council (VTRC) Project 177566 and Report 24-R3 titled “Engineered Frameworks for Evaluating the Use of Recycling Agents in Surface Asphalt Mixtures for Virginia.” Phase II will focus on characterizing the binder availability in typical RAP material stockpiles in Virginia and assessing the effectiveness of RAs at activating the available binder for improved blending with virgin asphalt binder. Phase III will work towards developing guidelines or guidance documentation on how RAP availability and activity levels should be accounted for in mix design methods for Virginia, specifically those used to design asphalt mixtures with RAs. This research will lead to improvements in the long-term durability and performance of recycled asphalt mixtures in Virginia, ultimately resulting in cost savings and reduced environmental impacts from pavements. Additionally, this approach will enhance the understanding of truly innovative materials with promising performance, such as RAs and their effectiveness at activating the available RAP binder.

Language

• English

Project

• Status: Active
• Funding: $488523
• Contract Numbers:

  124560

• Sponsor Organizations:

  Virginia Transportation Research Council

  530 Edgemont Road
  Charlottesville, VA  United States  22903
• Managing Organizations:

  Virginia Transportation Research Council

  530 Edgemont Road
  Charlottesville, VA  United States  22903
• Project Managers:

  Habbouche, Jhony

• Performing Organizations:

  Virginia Transportation Research Council

  530 Edgemont Road
  Charlottesville, VA  United States  22903

  North Carolina State University, Raleigh

  Department of Civil Engineering, Campus Box 7908
  Raleigh, NC  United States  27695-7908
• Principal Investigators:

  Habbouche, Jhony

  Boz, Ilker

  Castorena, Cassie

  Underwood, Benjamin

• Start Date: 20231101
• Expected Completion Date: 0
• Actual Completion Date: 20260430

Subject/Index Terms

• TRT Terms: Asphalt mixtures; Binders; Mix design; Reclaimed asphalt pavements; Recycled materials
• Geographic Terms: Virginia
• Subject Areas: Highways; Materials; Pavements;

Filing Info

• Accession Number: 01898197
• Record Type: Research project
• Source Agency: Virginia Department of Transportation
• Contract Numbers: 124560
• Files: RIP, STATEDOT
• Created Date: Nov 3 2023 9:46AM