United States Department of Transportation
[PDF-7.85 MB]
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Edition:Technical Report
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Abstract:This report presents the research work from a pilot program regarding the feasibility of implementing high performance concrete on Arizona bridge decks, using the Sunshine Bridge in Holbrook, Arizona as a test case. An existing concrete slab was removed and a new concrete slab using silica fume high performance concrete with low corrosion steel was constructed. Steps in the pilot program included developing an HPC mix design using laboratory tests of various batches. Field trial batches were conducted at a ready mix plant near the Sunshine Bridge to simulate job conditions such as concrete batching, travel time, plastic and hardened concrete properties. Test results indicated that a concrete mix design with 0.41 w/cm ratio and 5 percent silica fume by weight of cement provided overall optimum performance against project requirements. On-site slab demonstration placements of HPC at the bridge by the selected contractor simulated actual job conditions such as concrete batching, travel time, placement, finishing, curing, etc. The purpose of this field placement is to evaluate the contractor's procedures and crew. The bridge deck consisted of a total of 206 yards were placed at a rate of approximately 37 yards of concrete per hour on August 24, 2005. A comprehensive testing program measured and documented HPC properties and field practices as a reference for future bridge deck projects using HPC.
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