03 Jun '11, 1pm

'Self-Healing' Concrete Could Double Lifespan of Bridges

'Self-Healing' Concrete Could Double Lifespan of Bridges

OTTAWA, ON — A more durable concrete that will increase the average lifespan of bridge decks by more than 20 years compared to typical high-strength concrete, and by more than 40 years compared to normal-strength concrete, has been developed by the NRC Institute for Research in Construction . Invented by Dr. Daniel Cusson, a senior researcher at the Institute, this high-performance concrete has been specially formulated to minimize shrinkage, which is typical of high-strength concrete, while maintaining its excellent mechanical properties. It also greatly reduces cracking, which diminishes the penetration of aggressive agents into the concrete, such as chlorides from the de-icing salts used on roads. As a result, it takes considerably more time for the chlorides to reach the steel reinforcement, initiate corrosion, and induce further damage to the structure. The key differ...

Full article: http://www.greenbiz.com/news/2011/06/02/self-healing-conc...

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