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Mid-America Transportation Center

Use of High-Volume Reclaimed Asphalt Pavement (RAP) for Asphalt Pavement Rehabilitation Due to Increased Highway Truck Traffic from Freight Transportation

Final Report
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Researchers

  • Principal Investigator: Mustaque Hossain (mustak@ksu.edu (785) 532-1576)
  • Co-Principal Investigator: Hosin Lee (hlee@engineering.uiowa.edu 319-335-6818)
  • Project Status
    Complete
    About this Project
    Brief Project Description & Background
    The high-volume use of RAP materials is attractive from economic and sustainability view points. This project investigates current issues realted to use high percentages of RAP.
    Research Objective
    The primary objective of this project is to investigate uses of high volume RAP/FRAP for KDOT in Kansas. The research will be conducted in close cooperation with KDOT and the University of Iowa.
    Potential Benefits
    The study would result in some practical guidelines to be followed by KDOT in specifying RAP/FRAP percentages as well as PG binder selection for Superpave mixtures. The study will promote sustainability in asphalt pavement rehabilitation.
    Abstract
    Most state agencies and paving contractors are advocating use of high volumes of Reclaimed/Recycled Asphalt Pavement (RAP) in hot-mix asphalt (HMA). However, use of large percentages of RAP results in nonhomogenity of Superpave mixtures that may not perform well. This project will study the use of fractionated RAP (FRAP) and/or combination of RAP and FRAP at different percentages for asphalt pavement rehabilitation. Impacts of FRAP, with differing percentages, on the binder grading, and whether combinations of high percentages of RAP and FRAP in Superpave mixture designs can meet current mix design requirements, potential impacts on the mechanistic and rutting characteristics of the mixtures will also be studied in details. The use of RAP/FRAP for shoulder mixtures will also be investigated.
    Project Amount
    $ 44784