Development of a Standard Test Method for Characterization of Asphalt Modifiers and Aging-Related Degradation Using an Extensional Rheometer

This study has been initiated to (a) Characterize modified asphalt binders in relation to their aging-related degradation; (b) develop a new standard and specification to supplement the knowledge gap in the performance grade (PG) system for modified asphalt binders. In the proposed study, an extensional rheometer fixture will be used in a DSR platform to perform a suite of tests. Elongation tests and fracture tests will be performed using the extensional rheometer varying sample geometry, temperature, and strain rate. To replace ductility test (American Association of State Highway and Transportation Officials [AASHTO] T51), final strain in elongation test will be analyzed along with other parameters. Second force peak of force ductility test (AASHTO T300) will be compared to second force peak in elongation test. A novel and direct low temperature cracking susceptibility test will be developed by analyzing fracture strength and fracture energy parameters in fracture test using extensional rheometer. Extensional stress relaxation modulus and strain hardening will be investigated to determine the influence of polymer microstructures such as linear and radial styrene-butadiene-styrene (SBS). The proposed study will also investigate and quantify (a) the degradation of modifiers with aging, and (b) how polymers/modifiers influence aging susceptibility. A standard test method and corresponding specifications will be developed for immediate implementation.

    Language

    • English

    Project

    • Status: Active
    • Funding: $108000
    • Contract Numbers:

      17BLSU01

    • 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 Tech University, Ruston

      Ruston, LA  United States  71272

      Louisiana Transportation Research Center

      4101 Gourrier Avenue
      Baton Rouge, LA  United States  70808
    • Principal Investigators:

      Wasiuddin, Nazimuddin

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

    Subject/Index Terms

    Filing Info

    • Accession Number: 01635011
    • Record Type: Research project
    • Source Agency: Transportation Consortium of South-Central States
    • Contract Numbers: 17BLSU01
    • Files: UTC, RiP
    • Created Date: May 13 2017 2:30PM