Specifications to Reduce Bridge Deck Cracking
To reduce cracking in concrete bridge decks, new specifications for low-cracking, high performance concrete were developed. The specifications require the use of a concrete with low paste content, low slump, moderate water-cement ratio, controlled placement temperature, elevated air content, and optimized aggregate gradation. What was learned?     Full Article>

Experiences with Ohio HPC Bridge Decks with Warranty Program
In 1999, the Ohio Department of Transportation produced a supplemental specification requiring contractors to warrant new bridge decks with high performance concrete for a period of 7 years. In 2005, the warranty period was reduced to 2 years when the state law was changed.     Full Article>

High Performance Concrete in Colorado
The definition of high performance concrete continues to evolve in Colorado as technology advances and performance requirements continue to raise the bar for high performance concrete. As such, achieving lower permeabilities and less cracking in bridge decks or higher compressive strengths for girders have been challenges.    
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