Investigating the use of Reclaimed Asphalt Pavement in Pavement Preservation Treatments

Due to concerns about climate change, the asphalt industry has increasingly used reclaimed asphalt pavement (RAP) in flexible pavements. The average RAP content in hot-mix asphalt (HMA) in Illinois was around 23% in 2019, and this percentage has been increasing since. The RAP used in HMA production in Illinois was more than a million tons in 2019. In some areas, the produced RAP is greater than what can be used in HMA. Hence, RAP has been used in other applications, such as aggregate in concrete and in pavement preservation treatments (e.g., chip seal and micro surfacing). The study objectives are as follows: (1) review existing literature on the use of RAP in preservation treatments both within the US and abroad; (2) estimate the financial benefits of using RAP in preservation treatments in Illinois, which will include determining the RAP inventory and dispersion across the state; and (3) provide an insight on the feasibility of using RAP in preservation treatments in Illinois, which may include introducing a decision process (e.g., a flowchart) for recommending the use of RAP in preservation treatments in Illinois.


    • English


    • Status: Active
    • Funding: $36000
    • Contract Numbers:


    • Sponsor Organizations:

      Illinois Department of Transportation

      Bureau of Materials and Physical Research
      126 East Ash Street
      Springfield, IL  United States  62704-4766
    • Managing Organizations:

      University of Illinois, Urbana-Champaign

      Illinois Center for Transportation
      1611 Titan Drive
      Rantoul, IL  United States  61866
    • Principal Investigators:

      Al-Qadi, Imad

      Hajj, Ramez

    • Start Date: 20230501
    • Expected Completion Date: 20231031
    • Actual Completion Date: 0

    Subject/Index Terms

    Filing Info

    • Accession Number: 01881692
    • Record Type: Research project
    • Source Agency: Illinois Department of Transportation
    • Contract Numbers: R27-SP56
    • Files: RIP, STATEDOT
    • Created Date: May 1 2023 11:36AM