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.
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Corporate Authors:
Nebraska Department of Transportation
Materials & Research Investigation
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Authors:
- Heyen, Wally
- Halsey, Lieska
- Krason, Tim
- Varilek, Brandon
- Hansen, David
- Publication Date: 2020
Language
- English
Media Info
- Media Type: Web
- Features: Figures; Photos; Tables;
- Pagination: 7p
Subject/Index Terms
- TRT Terms: Epoxides; Evaluation; Grout; Maintenance; Road construction; Tie bars
- Identifier Terms: Nebraska Department of Transportation
- Subject Areas: Highways; Maintenance and Preservation; Materials;
Filing Info
- Accession Number: 01841028
- Record Type: Publication
- Report/Paper Numbers: 246
- Files: NTL, TRIS, ATRI, STATEDOT
- Created Date: Mar 29 2022 10:34AM