De-bonding of hot mix asphalt pavements in Washington State : an initial investigation.

Details

• Creators:
  Muench, Stephen T. ; Moomaw, Tim
• Corporate Creators:
  Transportation Northwest Regional Center X (TransNow) (UTC)
• Corporate Contributors:
  Washington (State). Dept. of Transportation. Office of Research and Library Services
• Subject/TRT Terms:
  • Debonding
  • Hot mix asphalt
  • Overlays (Pavements)
  • Asphalt emulsions
  • Pavements, Asphalt--Performance--Washington (State)
  • Pavements--Overlays--Performance--Washington (State)
  • Asphalt emulsion mixtures--Evaluation
• Publication/ Report Number:
  WA-RD 712.1/TNW 2008-10
• Resource Type:
  Tech Report
• Geographical Coverage:
  Washington
• Edition:
  Final technical report.
• Corporate Publisher:
  Transportation Northwest (TransNow) UTC
• Abstract:
  Recent evidence in Washington State indicates that de-bonding of HMA surface layers may become a significant ; problem. “De-bonding” describes a condition where adjacent layers of HMA lose adhesion to one another and can ; become separated. Typically, design and construction practice is to build in a certain amount of bonding, however ; the appropriate amount, testing and techniques are still under debate. For WSDOT pavements, which are generally ; thick and long-lasting, this de-bonding is thought to be more prevalent between the surface layer (usually applied ; as a preservation overlay) and underlying layers. This de-bonding may contribute to early failure of the HMA ; pavement surface layer, which can increase pavement preservation costs. This study gathers initial evidence on debonding ; in Washington State and attempts to define the problem scope and potential performance impacts. ; Specifically it attempts (1) determine if de-bonding occurs, (2) identify possible de-bonding mechanisms, (3) ; define the scope of de-bonding in WSDOT pavements, (4) determine de-bonding impacts on pavement ; performance, and (5) identify the role of tack coats in de-bonding.
  More +
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/17234/dot_17234_DS1.pdf
• File Type:
  [PDF - 5.10 MB]
• Collection(s):
  University Transportation Centers ; US Transportation Collection
• Main Document Checksum:
  urn:sha256:765a43ad9e64e601e30aadb7254f1bbe36000a2c2b42e138f28f5f385547ae13