Waste ash from coal could save billions in repairing US bridges and roads
Tuesday, March 29, 2011 - 21:30
in Earth & Climate
Coating concrete destined to rebuild America's crumbling bridges and roadways with some of the millions of tons of ash left over from burning coal could extend the life of those structures by decades, saving billions of dollars of taxpayer money, scientists report. A new coating material for concrete made from flyash is hundreds of times more durable than existing coatings and costs only half as much.