Impact of High RAP Content on Pavement Structural Performance

Agencies in Illinois are attempting to use up to 50% RAP in HMA to realize an economic savings. Any structural behavior and durability differences from a standard Illinois Department of Transportation (IDOT) HMA resulting from the recycling operation have not been addressed. The performance properties of high RAP mixtures need to be investigated for their impact on pavement performance characteristics (McDaniel NCHRP 9-21 Report) and these will be investigated in this study through modulus, fatigue, stripping, wheel tracking and low temperature testing.


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    • Status: Completed
    • Contract Numbers:


    • Sponsor Organizations:

      Illinois Department of Transportation

      2300 S. Dirksen Parkway
      Springfield, IL  USA  62764
    • Performing Organizations:

      University of Illinois, Urbana-Champaign

      1105 Newmark Civil Engineering Lab, 205 North Matthews Avenue
      Urbana, IL  USA  61801
    • Principal Investigators:

      Al-Qadi, Imad

      Carpenter, Samuel

    • Start Date: 20080701
    • Actual Completion Date: 20101231
    • Source Data: RiP Project 24728

    Subject/Index Terms

    Filing Info

    • Accession Number: 01470234
    • Record Type: Research project
    • Source Agency: Illinois Department of Transportation
    • Contract Numbers: R27-37
    • Files: RiP
    • Created Date: Jan 19 2013 1:01AM