John M. Simpson

John M. Simpson's Posts

Predicting Thermal Cracking in Bridge Deck Repairs

The increased traffic load on interstates and major highway systems has led to ever-shorter time requirements for the completion of deck repairs. Repair contractors often must pay penalties when roadways are not open to traffic on time. When concrete bridge decks are repaired, the required rapid strength gain results in a quick and significant temperature rise in the concrete. Many DOT requirements for opening roadways to traffic with concrete as little as 18 hours old leave no possibility for gradual cooling. As a result, the newly poured concrete repairs crack. Read more

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