Asphalt Binder Rheological Characterization for Extreme Climate Events

Sustained extreme (hot and cold) climate spells result in significant pavement distresses and they appear to occur with increasing frequency. Asphalt is significantly affected by this problem but existing test protocols have not been developed with such extreme conditions in mind. This research will (1) analyze climate data to predict future weather patterns, (2) relate climate to pavement condition, and (3) use techniques of molecular modeling to elucidate the relationship between asphalt chemical composition and rheological properties. The effect of modifiers on asphalt viscoelastic properties will be of particular focus. Research findings will help build highways that better adapt to new climate realities. The outcomes of this 2-year research will be (i) development of new asphalt modification protocols, and (ii) an updated testing protocol that will evaluate the suitability of modified asphalts for extreme climate scenarios. This research approach will comprise of the following tasks: (1) Review of literature on climate pattern predictions and how climate change will impact highway transportation infrastructure; (2) Laboratory testing of asphalt binders to assess properties with regard to extreme climate events; (3) Determine desired threshold binder property values to withstand possible extreme climate events; and (4) Molecular modeling to elucidate the relationship between asphalt chemical composition, modifier type/dosage/blending procedure and the rheological properties of the binder.

    Language

    • English

    Project

    • Status: Active
    • Funding: $134021.00
    • Contract Numbers:

      DTRT13-G-UTC36

      SPTC 14.1-64

    • Sponsor Organizations:

      Texas Department of Transportation

      125 E. 11th Street
      Austin, TX  United States  78701-2483

      Research and Innovative Technology Administration

      University Transportation Centers Program
      1200 New Jersey Avenue
      Washington, DC  United States  20590
    • Performing Organizations:

      Texas Tech University, Lubbock

      2500 Broadway
      Lubbock, TX  United States  70409
    • Principal Investigators:

      Khare, Rajesh

      Senadheera, Sanjaya

    • Start Date: 20140801
    • Expected Completion Date: 0
    • Actual Completion Date: 20160731
    • Source Data: RiP Project 37448

    Subject/Index Terms

    Filing Info

    • Accession Number: 01543044
    • Record Type: Research project
    • Source Agency: Southern Plains Transportation Center
    • Contract Numbers: DTRT13-G-UTC36, SPTC 14.1-64
    • Files: UTC, RiP
    • Created Date: Nov 4 2014 1:00AM