Analysis of Seasonal Strain Measurements in Asphalt Materials under Accelerated Pavement Testing and Comparing Field Performance and Laboratory Measured Binder Tension Properties

Seasonal variation of measured pavement responses with temperature and its relationship to pavement performance has not been thoroughly evaluated for ALF Experiments II and III. Such information may be used to improve instrumentation strategies in future ALF experiments. These results may also be used to establish the relationship between binder elongation properties at intermediate and low temperature and mix performance. Such link may be used to update current binder standards by specifying measurement of properties that are indicative of pavement performance. Such properties may be obtained by complementing or modifying current specifications with the direct tensile test or the multiple stress creep recovery test instead of the current ductility test. The objectives of this study were two fold. First, instrument responses in past ALF Experiments were analyzed to quantify the impacts of seasonal variation of pavement responses with temperature and its relationship to pavement performance. Second, nine straight asphalt binders obtained from two asphalt suppliers were tested to link laboratory measured properties to mix performance. Based on the results of this analysis, it is concluded that survivability and repeatability of the gages were acceptable in past experiments. However, strain gages were not a reliable indicator of damage development in hot-mix asphalt (HMA). Laboratory test results showed that a binder that provides high ductility at intermediate temperature would be characterized by poor elongation properties at low temperature. This trend was related to the binder fractional compositions as an increase in the binder content of low molecular weight results in an increase in its ductility at intermediate temperature. However, an increase in paraffinic maltene content results in the binder tending to crystallize at higher temperature as it approaches the glassy region. Based on the results of laboratory testing conducted in this study, it is recommended that the ductility test be kept in the state binder’s specifications as it correlates well with mix performance at intermediate temperature. This test may not be substituted with the direct tensile test or the multiple stress creep recovery test.

  • Record URL:
  • Summary URL:
  • Corporate Authors:

    Louisiana State University, Baton Rouge

    Department of Civil and Environmental Engineering
    Baton Rouge, LA  United States  70803

    Louisiana Transportation Research Center

    Louisiana State University, 4101 Gourrier Avenue
    Baton Rouge, LA  United States  70808

    Louisiana Department of Transportation and Development

    1201 Capitol Access Road, P.O. Box 94245
    Baton Rouge, LA  United States  70804-9245

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Elseifi, Mostafa A
  • Publication Date: 2009-6

Language

  • English

Media Info

  • Media Type: Web
  • Edition: Final Report
  • Features: CD-ROM; Figures; Photos; References; Tables;
  • Pagination: 86p

Subject/Index Terms

Filing Info

  • Accession Number: 01154797
  • Record Type: Publication
  • Report/Paper Numbers: FHWA/LA.09/444
  • Contract Numbers: LTRC 08-2P; State Project 736-99-1519
  • Files: TRIS, USDOT, STATEDOT
  • Created Date: Apr 15 2010 2:43PM