What exactly is fly ash?



  1. 0 Votes

    Fly ash is a residue generated from the combustion of coal. All fly ash includes silicon dioxide and calcium oxide. Fly ash may also contain trace amounts of arsenic, beryllium, boron, cadmium, chromium, cobalt, lead, manganese, mercury, molybdenum, selenium, strontium, thallium, and vanadium.

  2. 0 Votes

    When we burn coal to make electricity, fly ash is left behind. Fly ash is the result of burning finely ground coal in a boiler to get electricity. Fly ash has about the same texture as talcum powder. The grains of fly ash are about the same size as those found in silt and clay and look like tan, glassy beads. It can be used to make cement and concrete because of how well it bonds with water and calcium hydroxide in high temperatures.

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