Concrete, Mortar, and Fly Ash

Fly ash is a fine, glassy powder recovered from the gases of burning coal during the production of electricity. These micron-sized earth elements consist primarily of silica, alumina, and iron. When mixed with lime and water it forms a cementitious compound with properties very similar to those of Portland cement. Due to this similarity, fly ash can be used to replace a portion of cement in the concrete, providing some distinct quality advantages:

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