HPC for the Angeles Crest Bridge 1
The Angeles Crest Bridge 1 consists of six lines of spliced girders, each with a total length of 208 ft (63.4 m). Each girder was shipped to the site in three segments and spliced together at a staging area before being moved into its final position. Different high performance concrete mixes were used in the precast girders, splice closure, and deck.    
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HPC for the I-10 Bridges in Louisiana
After Hurricane Katrina nearly destroyed the twin-span, I-10 bridges across Lake Ponchartrain, the Louisiana Department of Transportation and Development designed near-hurricane proof replacement bridges with a service life of 100 years. High performance concrete was chosen for its extremely low permeability and long-term durability.   
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AASHTO Adopts Recommended Practice on Alkali-Silica Reactivity
The AASHTO Subcommittee on Materials recently approved a recommended practice for determining the reactivity of concrete aggregates and selecting appropriate measures to prevent deleterious expansion in new concrete. The practice provides performance-based and prescriptive-based approaches.
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Q & A
Question: If the concrete in my precast, prestressed concrete bridge beams has achieved the specified compressive strength before the specified age, is there any reason not to transport and erect them?
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Letter to the Editor
The article titled "Measurement of Air Content in Concrete," which was published in HPC Bridge Views, Issue No. 61, May/June 2010, describes various test methods for measuring air content in concrete. I think we do a disservice when including the Chace Air Indicator in any discussion of test methods.
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