Evaluation of Tie-Bar Anchoring Methods: Non-Shrink Grout vs. Epoxy

In 2015, Nebraska Department of Transportation Materials & Research Divisions (M&R) conducted research to determine the best method for inserting tie-bars. Tie bars are epoxy coated steel bars that connect the longitudinal joints in concrete pavement. Tie bars prevent faulting and joint separation between lanes. In the study, M&R conducted a survey to evaluate placement and testing requirements of other agencies, and compared different methods and materials for installing tie-bars. The materials for anchoring tie-bars were not investigated. NDOT materials engineers observed during pavement repairs (PR) that tie-bars placed with non-shrink grout exhibited poor strength when pulled M&R engineers launched an investigation into the strength of non-shrink grout and epoxy anchored tie-bars in PR projects. The purpose of this investigation was to verify whether or not non-shrink grout provides suitable strength in repairs and provide a recommendation for construction specification.

Language

  • English

Media Info

  • Media Type: Web
  • Features: Figures; Photos; Tables;
  • Pagination: 7p

Subject/Index Terms

Filing Info

  • Accession Number: 01841028
  • Record Type: Publication
  • Report/Paper Numbers: 246
  • Files: NTL, TRIS, ATRI, STATEDOT
  • Created Date: Mar 29 2022 10:34AM