Long-Term Performance of Dowel Bar Retrofit in Washington State

In 1993, Washington State Department of Transportation (WSDOT) initiated its first full-scale dowel bar retrofit (DBR) project for the repair of a severely faulted concrete pavement. While DBR has had varied success in the United States, primarily due to construction techniques, the performance in Washington State has been very good such that DBR is considered a cost effective rehabilitation treatment for faulted concrete pavements. There are several factors that contribute to longer-term performance of DBR which include: apply prior to significant fault development (¨û inch or less); cut DBR slots to the proper depth; limit weight of jackhammers to 30 pounds; thoroughly clean DBR slot prior to placement of patching material; and extender aggregate should be of adequate size to allow consolidation of patching material around the dowel bar. To date, WSDOT has completed approximately 280 lane miles with no major DBR design or construction related issues.

Language

  • English

Media Info

  • Media Type: DVD
  • Features: Figures; Photos; References; Tables;
  • Pagination: 12p
  • Monograph Title: TRB 89th Annual Meeting Compendium of Papers DVD

Subject/Index Terms

Filing Info

  • Accession Number: 01151058
  • Record Type: Publication
  • Report/Paper Numbers: 10-2604
  • Files: PRP, TRIS, TRB
  • Created Date: Jan 25 2010 11:15AM