Fundamental Properties of Asphalts and Modified Asphalts II

The major goal of the research is to develop fundamentally based models, methods, and tests that can be used to predict and improve the performance of asphalts and, ultimately, asphalt pavements. Current emphasis includes asphalt-water interactions, i.e., moisture damage, aging, fatigue damage including healing as well as crack phenomenology, the application of state-of- the-art scientific techniques, e.g., Atomic Force Microscopy (AFM), Magnetic Resonance Imaging (MRI), etc. Current practical issues such as the use of poly-phosphoric acid to modify asphalt, the possible implications of microbial degradation on the performance of asphalt pavements, and the identification and quantification of asphalt modifiers, e.g., polymers, are being researched. Laboratory work, both fundamental and applied, is being validated (confirmed, disconfirmed, interpreted) in comparative pavement test sites built by States in conjunction with Western Research Institute, who solicits the sites, designs the experiments, and monitors and tests their construction and performance. Four such validation sites have been constructed to date and more are planned. Finally, the all-important area of technology transfer (implementation) is being undertaken with an emphasis on converting the ideas, tests, and procedures developed by Western Research Institute into accepted standardized procedures readily available for use by the technical asphalt pavement community. The risks associated with not proceeding with the research, in addition to any penalties occurring because of failure to obey Congressional legislation, involve the squandering of the resources of the US's largest and most sophisticated research group devoted to the application of chemistry and molecular science to asphalt and asphalt pavements. An additional risk is the failure to harvest research results from research currently in progress but not yet completed. As a powerful example, the validation asphalt pavements would be an almost complete waste of money if they were abandoned before they ended their useful lives so the effects of different asphalts, with their different chemistries, could be used to demonstrate in a practical way the theories and hypotheses concerning the effects of asphalt's molecular constitution on pavement performance.

    Language

    • English

    Project

    • Status: Completed
    • Funding: $21377720.00
    • Contract Numbers:

      DTFH61-99-C-00022

    • Sponsor Organizations:

      Federal Highway Administration

      1200 New Jersey Avenue, SE
      Washington, DC  United States  20590
    • Project Managers:

      Bastian, Ernest

    • Performing Organizations:

      Western Research Institute

      Laramie, WY  United States 
    • Principal Investigators:

      Robertson, Ian

    • Start Date: 19990119
    • Expected Completion Date: 0
    • Actual Completion Date: 20061231
    • Source Data: RiP Project 4442

    Subject/Index Terms

    Filing Info

    • Accession Number: 01461057
    • Record Type: Research project
    • Source Agency: Federal Highway Administration
    • Contract Numbers: DTFH61-99-C-00022
    • Files: RiP, USDOT
    • Created Date: Jan 3 2013 1:37PM