United States Department of Transportation
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Repair or Strengthening of Bridge Decks with Partial-Depth Precast Deck Panels
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2024-01-01
[PDF-9.80 MB]
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Edition:Final Report Oct. 2020 – Jan. 2024
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Abstract:The primary objectives of this research project involve: (a) forensic analysis of composite deck samples from the I-15 800 South bridge; (b) replication of non-composite specimens for testing; (c) destructive testing of retrofitted non-composite deck samples; and (d) recommended solutions for the repair of bridges affected by debonding of the cast-in-place concrete section from the precast section without impacting traffic. Five retrofit methods were performed: (1) uni-directional carbon fiber reinforced polymer composite strips bonded to the bottom of the precast section; (2) proprietary mechanical shear anchors connecting the cast-in-place and precast section; (3) high modulus epoxy injection between the cast-in-place and precast sections; (4) nonproprietary shear anchors connecting the cast-in-place and precast sections; and (5) epoxy injection with proprietary shear anchors. Based on the research findings, the epoxy injection retrofit method is recommended to be the most effective solution for repairing bridge decks affected by debonding of the cast-in-place section due to interlayer delamination without impacting traffic.
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