George Washington Bridge Asphalt-Wearing Course and Bond Coat Analysis

The upper level of the George Washington Bridge is a flexible, orthotropic steel deck. In the past, it has been difficult to obtain a significant service life from asphalt-wearing courses due to this deck design coupled with a high traffic volume. Lately, the asphalt-wearing course on the upper level has seen accelerated fatigue because all truck traffic is redirected to the upper level for security reasons. The primary modes of failure have been fatigue of the wearing course and loss of bond to the steel deck. In an attempt to increase the service life, The Port Authority of NY and NJ Materials Engineering Laboratory developed several asphalt mixture proportions with various polymer modifications. These asphalt mixtures were tested at the Rutgers Asphalt/Pavement Laboratory for fatigue and plastic deformation. Research and testing was also performed to improve the bond of the wearing course to the steel deck. This paper will present the mixture proportions tested, the results of the laboratory testing, the mixture that was chosen, and the experiences encountered during the installation of the asphalt-wearing course.

Language

  • English

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 596-607
  • Monograph Title: Airfield and Highway Pavements. Efficient Pavements Supporting Transportation's Future

Subject/Index Terms

Filing Info

  • Accession Number: 01144360
  • Record Type: Publication
  • ISBN: 9780784410059
  • Files: TRIS
  • Created Date: Nov 14 2009 3:54PM