New Composite Pavement System for Orthotropic Steel Bridge Decks

Orthotropic steel bridge decks are widely used for large and medium span bridges, however early failure in traditional asphalt concrete surfaces has proved to be a problem on high traffic routes. Consequently, a demand exists to find a durable overlay for such bridges. In this paper, four kinds of design indices are explored, based on the primary types of pavement distress. In addition, the mechanics of surface wear on orthotropic steel bridges was analyzed by the Finite Element Method (FEM), which shows that the higher elastic modulus of the intermediate layer and/or the thicker the wearing surface, the less stress there is in the critical fatigue parts of the surface and the more favorable the wearing surface is. A new composite wearing surface system was presented, with a cement-based intermediate layer, shear stud connector, and SMA13 surface. Also, a number of small-scale tests were conducted to investigate the performance of bonding the new composite overlay to a steel plate, such as the thermal compatibility, rutting test under high temperature, and fatigue durability of the new composite wearing surface system. These were then compared to the traditional double-layer asphalt concrete surface. It was concluded that the performance of the new composite system is more durable than the traditional one.

Language

  • English

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 76-84
  • Monograph Title: New Technologies in Construction and Rehabilitation of Portland Cement Concrete Pavement and Bridge Deck Pavement: Selected Papers from the 2009 GeoHunan International Conference

Subject/Index Terms

Filing Info

  • Accession Number: 01142164
  • Record Type: Publication
  • ISBN: 9780784410486
  • Files: TRIS
  • Created Date: Oct 13 2009 1:07PM