Evaluation of Interlayer Bonding in Hot Mix Asphalt Pavements

This study investigates the potential of falling weight deflectometer (FWD) data for use in quantifying the level of interlayer bonding achieved in asphalt pavements. The data analyzed was obtained from the Federal Aviation Administration's National Airport Pavement Test Facility. At some sections of the test pavement at this facility a lack of bonding was found between the asphalt layers. Material property data and FWD data were used to calculate the stiffness moduli for each layer in the pavement. A significant reduction in the surface layer moduli was found for sections of the pavement where there was known to be a lack of underlayer bonding. This difference in moduli was detected using data taken after just one day of test traffic. Toward the end of the test traffic period, no significant difference in moduli was found. Also, to predict the potential effects that the lack of interlayer bonding can have on pavement performance, two quantities, "tack coat failure ratio" and "effect of slip" were defined and found to have a strong correlation.

  • Availability:
  • Authors:
    • Gomba, Steven
    • Liddle, John
    • Mehta, Yusuf A
  • Publication Date: 2005-5


  • English

Media Info

  • Media Type: Print
  • Features: Figures; References;
  • Pagination: pp 13-24
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 01006580
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Oct 14 2005 11:17AM