High performance concrete for Giles Road Bridge

The use of high performance concrete (HPC) for the 120th and Giles Road Bridge in Sarpy County, Nebraska is the main focus of this paper. The bridge is one of the HPC bridge Showcases sponsored by the Federal Highway Administration under its Strategic Highway Research Program (SHRP). This prestressed concrete girder bridge consists of three spans made continuous using conventional reinforcement in the cast-in-place deck for resisting negative moment. Girders with an optimized cross section and a concrete compressive strength of 82.74M Pa (12,000 psi) are used for the design of the bridge. The cast-in-place deck is specified to have a compressive strength of 55.16 M Pa (8,000 psi) and a low permeability for improved durability and resistance to deicing salts. This bridge is to be built in the vicinity of a conventional concrete bridge, similar in dimensions and traffic volume. Both bridges are briefly described with economical comparison presented. The HPC bridge will be instrumented and planned to be monitored for several years.