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 concrete buildings, bridges and roads, researchers say. The researchers note that using the fly ash to coat concrete could prolong the life of those 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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