United States Department of Transportation
i
Design and Construction of Field-Cast UHPC Connections : [technote]
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2019-02-01
[PDF-4.01 MB]
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Abstract:Advancements in the science of concrete materials have led to the development of a new class of cementitious composites called ultra-high performance concrete (UHPC). UHPC exhibits mechanical and durability properties that make it ideal for use in new solutions to pressing concerns about highway-infrastructure deterioration, repair, and replacement.(1,2) The use of field-cast UHPC details that connect prefabricated structural elements in bridge construction has captured the attention of bridge owners, specifiers, and contractors across the country. These connections can be simpler to construct and can provide more robust long-term performance than connections constructed through conventional methods.(3) This document provides guidance on the design and deployment of field-cast UHPC connections. Field-cast UHPC connections provide new opportunities to create robust structural systems composed of prefabricated components. The nearly 300 deployments to date in the highway bridge inventory have demonstrated the constructability and field performance of these systems. This document provides design and construction guidance relevant to field-cast UHPC connections. It is expected to facilitate broader deployment of PBEs by providing owners and contractors with the tools necessary to specify, design, and construct a new class of robust connection details.
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