Evaluation of Asphalt Rejuvenators on Asphalt Mixtures with High RAP

The Kentucky Transportation Cabinet (KYTC) has examined whether increasing the amount of reclaimed asphalt pavement (RAP) in surface mixtures can lower costs. One downside of higher RAP content is that the use of aged binder negatively affects cracking resistance. While asphalt rejuvenators may restore binder properties and improve the durability of high-content RAP mixtures, Kentucky has limited field experience applying them on state-maintained routes. As such, KYTC lacks sufficient performance data to determine if rejuvenated surface mixtures with high RAP content exhibit long-term performance similar to conventional surface mixtures.

Language

• English

Project

• Status: Active
• Funding: $290,000.00
• Contract Numbers:

  KYSPR 27-703

• Sponsor Organizations:

  Kentucky Transportation Cabinet

  200 Mero Street
  Frankfort, KY  United States  40622
• Performing Organizations:

  University of Kentucky, Lexington

  Kentucky Transportation Center College of Engineering, 176 Raymond Building
  Lexington, KY  United States  40506-0281
• Principal Investigators:

  Hacker, David

  Beggs, Adrienne

  Graves, Clark

  Ashurst, Kean

• Start Date: 20260701
• Expected Completion Date: 20290630
• Actual Completion Date: 0

Subject/Index Terms

• TRT Terms: Asphalt mixtures; Cost effectiveness; Pavement surface course; Reclaimed asphalt pavements; Rejuvenators
• Subject Areas: Finance; Highways; Materials; Pavements;

Filing Info

• Accession Number: 02000582
• Record Type: Research project
• Source Agency: University of Kentucky, Lexington
• Contract Numbers: KYSPR 27-703
• Files: RIP, STATEDOT
• Created Date: Aug 26 2026 5:04PM