Preparation of high strength and low-cost glass ceramic foams with extremely high coal fly ash content

The success of recycling the molten blast furnace slagto glass fiber in industrial scale greatly encourage us to keep on seeking more environmental friendly applications from industrial waste. In this work, high strength and low-cost glass ceramic foams are prepared with extremely high coal fly ash content. The prepared glass ceramic foam sample introduced 89 % coal fly ash and 6 % CaCO3, and sintered at 1150 °C has the best comprehensive properties, with the bending strength reaches 80.3 MPa, even though the bulk density is relatively high. The method is a good way to recycle the coal fly ash and the product will be used as a commercial building material to generate economic benefits.