Laboratory Evaluation of Fiber-Reinforced Polymer Dowel Bars for Jointed Concrete Pavements

Fiber Reinforced Polymer (FRP) dowel bars were subjected to mechanical evaluation in laboratory conditions. Flexural and shear performance was measured on control and conditioned specimens to determine adequacy for long term service in concrete pavements. The conditioning process consisted of submergence in alkali solution to simulate the high pH in concrete, exposure to water to simulate the high moisture content, and ultraviolet radiation from sunlight during transporting and handling. Strength, stiffness, and fatigue life are described in detail, and test results on bars from two manufacturers (two types of bars) are discussed, including susceptibility to the three conditioning processes. Stiffness was found to be independent of load frequency, but a 10 to 15 percent stiffness reduction was found to occur as temperature changes from 20 degrees to 40 degrees centigrade. It was also found that when FRP dowels fail in bending fatigue, they fail when the stiffness is reduced to about 50 percent of the original (unconditioned) stiffness.

Language

  • English

Media Info

  • Media Type: CD-ROM
  • Features: Figures; Photos; References;
  • Pagination: 20p
  • Monograph Title: TRB 86th Annual Meeting Compendium of Papers CD-ROM

Subject/Index Terms

Filing Info

  • Accession Number: 01046104
  • Record Type: Publication
  • Report/Paper Numbers: 07-2450
  • Files: TRIS, TRB
  • Created Date: Feb 8 2007 7:08PM