Developing Performance and Safety Specifications for Rejuvenating Seals

Pavement preservation treatments delay pavement deterioration by sealing cracks, preventing pavement oxidation, and, in the case of surface fog seals, rejuvenating the existing pavement surface layers. Rejuvenating seals are believed to have the ability to modify the surface binder of aged pavement surfaces. If these seals can rejuvenate the surface, they may be able to restore functionality to old pavements allowing them to function for longer without total reconstruction. Traditionally petroleum-based rejuvenators have been used in such applications, however bio-based rejuvenators also have been increasingly utilized. Preservation treatments utilizing asphalt emulsions as the binder generally have been considered secondary to hot mix asphalt (HMA) technologies and therefore have not been researched to the same extent. Over the last 5 years, the AASHTO Technical Services Program (TSP2) Emulsion Task Force (ETF) has made a concerted effort to improve the state of the science in emulsion technology and to create consistent, performance-based standards (specifications, test methods, design practices, etc.) that are sponsored by AASHTO and are not vendor specific. To date, 12 standards have been approved. The emergence of new materials on the market warrant further study of rejuvenating seals to determine the extent the new materials penetrate and rejuvenate the asphalt pavement. The objectives of this project are to (1) provide the characteristics of the rejuvenator based on chemistry and rheology; (2) determine how different rejuvenating compounds are penetrating and rejuvenating the underlying pavement; (3) determine how the desired performance for a rejuvenating seal is measured and quantified in the laboratory and field; (4) determine the life extending benefit and impact on friction properties of a rejuvenating seal measured and quantified in the laboratory and field; (5) determine how practitioners may design an optimum dose and/or application rate for a rejuvenator required to provide the desired performance and friction properties; and (6) document suggested practice prepared in conformance with AASHTO standard format.


  • English


  • Status: Active
  • Funding: $300000
  • Contract Numbers:

    Project 10-114

  • Sponsor Organizations:

    National Cooperative Highway Research Program

    Transportation Research Board
    500 Fifth Street, NW
    Washington, DC  United States  20001

    American Association of State Highway and Transportation Officials (AASHTO)

    444 North Capitol Street, NW
    Washington, DC  United States  20001

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Project Managers:

    Crichton-Sumners, Camille

  • Performing Organizations:

    Auburn University

    Auburn, AL  United States  36830
  • Principal Investigators:

    Moraes, Raquel

  • Start Date: 20220804
  • Expected Completion Date: 20250804
  • Actual Completion Date: 0

Subject/Index Terms

Filing Info

  • Accession Number: 01773410
  • Record Type: Research project
  • Source Agency: Transportation Research Board
  • Contract Numbers: Project 10-114
  • Files: TRB, RIP
  • Created Date: May 27 2021 7:23PM