Assessing the Durability and Long-Term Performance of Rejuvenated Asphalt Mixes with RAP

This research idea addresses an important Oklahoma Department of Transportation (ODOT) need to use higher amounts of recycled materials in asphalt mixes, which is essential for the statewide implementation of Balanced Mix Design (BMD). Rejuvenators have been used successfully to restore the properties of asphalt mixes containing Reclaimed Asphalt Pavement (RAP). There is a wide variety of petroleum-based and bio-based rejuvenators available commercially that purport to improve the performance of asphalt mixes with RAP. A crucial aspect of the design of these mixes is to ensure durability and long-term performance. Some additives may only impart a short-term effect and aid in mix compaction without showing a sustained long-term effect on performance. In this study, rejuvenated asphalt mixes with RAP will be prepared, using local materials from Oklahoma, and assessed to evaluate their long-term performance, including raveling resistance and stripping susceptibility. A comprehensive testing plan will be developed and conducted for testing of both asphalt binder and asphalt mixture. The test plan includes mixture testing to assess the moisture susceptibility using Tensile Strength Ratio (TSR) and Hamburg Wheel Tracking (HWT) tests. The HWT test results will be analyzed using the corrected rut depth (CRD) and striping number (SN) parameters to evaluate rutting and moisture resistance. The mixes will also be tested using IDEAL-CT at both short-term aged and long-term aged conditions to ensure durability and balanced performance. The binder testing will include evaluating the rheological properties of the binders at extended Pressure Aged Vessel (PAV) aging durations. The binders will also be evaluated using Fourier Transform Infrared (FTIR) spectroscopy to assess aging susceptibility. The proposed study will provide valuable information on the effectiveness of rejuvenators on asphalt mixture performance during service life. The findings of this study will be used to propose specification requirements for rutting, cracking, and moisture-induced damage for rejuvenated asphalt mixes considering long-term performance and durability.

• Record URL:
  • https://www.sptc.org/cy3-osu-ou-11

Language

• English

Project

• Status: Active
• Funding: $115,000.00
• Contract Numbers:

  69A3552348306 (CY3-OSU-OU-11)

• Sponsor Organizations:

  Southern Plains Transportation Center

  University of Oklahoma
  202 W Boyd St, Room 213A
  Norman, OK  United States  73019

  Oklahoma Department of Transportation

  200 NE 21st Street
  Oklahoma City, OK  United States  73105
• Managing Organizations:

  University of Oklahoma, Norman

  School of Civil Engineering and Environmental Science
  202 West Boyd Street, Room 334
  Norman, OK  United States  73019
• Project Managers:

  Ghasemi, Hamid

• Performing Organizations:

  University of Oklahoma, Norman

  School of Civil Engineering and Environmental Science
  202 West Boyd Street, Room 334
  Norman, OK  United States  73019

  Oklahoma State University, Stillwater

  School of Civil & Environmental Engineering
  Stillwater, OK  United States  74078
• Principal Investigators:

  Elkashef, Mohamed

  Ashik Ali, Syed

  Zaman, Musharraf

• Start Date: 20260101
• Expected Completion Date: 20270101
• Actual Completion Date: 0
• USDOT Program: UTC

Subject/Index Terms

• TRT Terms: Asphalt mixtures; Cracking; Durability; Mix design; Pavement performance; Reclaimed asphalt pavements; Recycled materials; Rejuvenators; Rutting
• Geographic Terms: Oklahoma
• Subject Areas: Highways; Materials; Pavements;

Filing Info

• Accession Number: 01975692
• Record Type: Research project
• Source Agency: Southern Plains Transportation Center
• Contract Numbers: 69A3552348306 (CY3-OSU-OU-11)
• Files: UTC, RIP
• Created Date: Jan 5 2026 11:09PM