Development of a Self-healing and Rejuvenating Mechanisms for Asphalt Mixtures Containing Recycled Asphalt Shingles

The objective of this project is to test the hypothesis that hollow-fibers containing a rejuvenator product can improve both self-healing, rejuvenation and mechanical properties of asphalt mixtures. The hollow-fibers containing a rejuvenator product will be synthesized with a sodium-alginate polymer as the encapsulating material. The encapsulated rejuvenator product will be a commercially-available synthetic oil. An optimization procedure will be performed by varying parameters such as the percentage of emulsifier, percentage of plasticizer, and ratio rejuvenator to polymer used. The thermal stability and tensile strength of the developed fibers will be tested to determine their resistance to asphalt production processes. The optimum fiber percentage will be assessed based on the performance of asphalt blends with different percentages of fibers on a Multiple Stress Creep Recovery (MSCR) test and based on the performance of asphalt mixtures with different percentages of fibers on a fatigue cracking resistance test. Performance Grading (PG) will be performed on different asphalt blends containing the optimum amount of fibers and/or recycled materials to evaluate the effects of the fibers on the rheological properties of the binder. Similarly, asphalt mixtures containing the optimum amount of fibers and/or recycled materials will be evaluated against low-temperature cracking and rutting susceptibility in a controlled laboratory environment. The healing efficiency of asphalt mixtures containing fibers in two environmental conditions will be quantified by measuring the crack width before healing (day 0) and at different healing periods. Finally, a relationship between undamaged, damaged, and healed stiffness will be evaluated to determine the stiffness recovery at the end of the healing period.

    Language

    • English

    Project

    • Status: Active
    • Funding: $91710
    • Contract Numbers:

      17BLSU06

    • Sponsor Organizations:

      Office of the Assistant Secretary for Research and Technology

      University Transportation Centers Program
      Department of Transportation
      Washington, DC  United States  20590
    • Managing Organizations:

      Office of the Assistant Secretary for Research and Technology

      University Transportation Centers Program
      Department of Transportation
      Washington, DC  United States  20590

      Transportation Consortium of South-Central States

      Louisiana State University
      Baton Rouge, LA  United States  70803
    • Project Managers:

      Hassan, Marwa

    • Performing Organizations:

      Louisiana State University and A&M College

      202 Himes Hall
      Baton Rouge, LA  United States  70803
    • Principal Investigators:

      Hassan, Marwa

    • Start Date: 20170508
    • Expected Completion Date: 20181108
    • Actual Completion Date: 0
    • USDOT Program: University Transportation Centers Program

    Subject/Index Terms

    Filing Info

    • Accession Number: 01635025
    • Record Type: Research project
    • Source Agency: Transportation Consortium of South-Central States
    • Contract Numbers: 17BLSU06
    • Files: UTC, RiP
    • Created Date: May 16 2017 1:13PM