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Evaluation of non-SBS modified binders using the multiple stress creep recovery test : [research project capsule].
  • Published Date:
    2015-12-01
  • Language:
    English
Filetype[PDF-140.52 KB]


Details:
  • Creators:
    Cooper, Samuel, III.
  • Corporate Creators:
    Louisiana Transportation Research Center
  • Subject/TRT Terms:
  • Publication/ Report Number:
    16-4B
  • Resource Type:
    Brief
  • Geographical Coverage:
    Louisiana
  • Corporate Publisher:
    Louisiana Transportation Research Center
  • Abstract:
    Higher traffi c coupled with heavier loads led the asphalt industry to introduce polymer-modifi ed

    binders to enhance the durability and strength of HMA pavements. Numerous research projects

    showed that G*/Sinδ, the high temperature specifi cation parameter for current Performance

    Graded (PG) asphalt binder is not adequate to refl ect the rutting characteristics of modifi ed

    binders. Even though G*/Sinδ can capture the viscous and elastic eff ects of neat binders, it is

    unable to denote the benefi ts of elastomeric modifi cation of asphalt binder. Consequently, many

    state DOTs have added supplemental specifi cations (“PG-Plus” tests) to identify the presence

    of polymer modifi ed binders. Louisiana is among the states that are currently using a PG-Plus

    specifi cation. Separation of Polymer, Force Ductility, Elastic Recovery tests are the required tests

    for the Louisiana Department of Transportation and Development (DOTD) PG-Plus requirement.

    However, most of these PG-Plus tests are unable to evaluate the performance of the polymer-enhanced binders. To be more specifi c, these tests can only determine the presence, not the

    performance, of a modifi er.

  • Format:
    PDF
  • Collection(s):
    US Transportation Collection
  • Main Document Checksum:
  • Supporting Files:
    No Additional Files
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