Cracking in Deck of Reinforced Concrete Railway Bridge, Denmark
Problem: Structural cracking due to alkali-aggregate reaction in 1-m thick reinforced deck of railway bridge.
Results: Impact-Echo tests detected horizontal cracking at mid-depth over entire span, a problem unknown to the bridge engineers.
Verification: Cores (and mode of failure during demolition).
Outcome: Bridge judged unsafe and demolished. When first hit with wrecking ball, lower half of deck separated almost as one piece, and fell to the road below.
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