Coal waste seen as significant resource for bridges, concrete structures

03/30/2011 | Fast Company online

Fly ash, a byproduct of burning coal, could help repair and maintain concrete buildings, bridges and roads, researchers say. The researchers note that using a fly ash mixture to coat concrete would prolong the life of structures -- at about half the cost of today's coating materials. Tests have shown that the coating protected concrete from deterioration when it was exposed to the acids present in air pollution.

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