What is Fly Ash?| Concrete Construction Magazine | Fly Ash .Dec 7, 2007 . Fly ash is a byproduct from burning pulverized coal in electric power generating plants. During combustion, mineral impurities in the coal fuse.what is fly ash,Chapter 1 - Fly Ash - An Engineering Material - Fly Ash Facts for .Sep 9, 2015 . What is fly ash? Fly ash is the finely divided residue that results from the combustion of pulverized coal and is transported from the combustion.
what is fly ash