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Yes, Fly Ash is used as an additive in concrete to replace some of the portland cement. I understand that replacing about half of the portland cement with fly ash will still allow reasonable strength and lower the heat generated during the curing process. Unfortunately, I don't know how it is shipped, but I would suspect it would be shipped in large bags. It is very fine and would make an aweful cloud if shipped in an open gondola. I recommend you contact a concrete supplier in your area that provides concrete for road or bridge construction. Good Luck - Ed
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