United States Department of Transportation
i
Exploration of UHPC Applications for Montana Bridges
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2024-02-01
[PDF-11.63 MB]
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Edition:Final Report August 2021 – February 2024
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Abstract:The following research project explores bridge applications of ultra-high performance concrete (UHPC). Bridge deterioration, including decks and other members, is a problem across Montana and UHPC overlays and patching/repairing have been found to be viable alternatives to bridge/element replacement. The current study began with a literature review on research, specifications, and implementation projects of UHPC bridge deck overlays. Existing UHPC overlay projects were reviewed and lessons learned by other states while using and specifying UHPC for bridge deck overlays were investigated. A recently published report from FHWA was highlighted, as it summarized the results of previous overlay and repair projects, and developed recommendations for the successful implementation in these applications. The highlighted content included overall material specifications for UHPC and design and construction specific considerations. A material-level evaluation was performed on three UHPC mixes, primarily focusing on workability, compressive strength, tensile strength, and tension and shear bond strengths. All three UHPCs exhibited adequate behavior and the resultant properties were above recommendations from ACI for concrete repair and overlay applications. Based on the material level evaluation results, a thixotropic version of Ductal was chosen for subsequent structural testing.
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