FLY ASH
Fly ash is a fine powder produced as a product from industrial power plants using pulverized coal or lignite as fuel. Under a microscope, they are spherical shaped “balls’’ finer than cement particles. Fly ash is used as an additive in concrete manufacturing and provides greater workability, performance, and quality of concrete. The use of fly ash reduces heat build-up and cracks in concrete. In addition, it reduces water demand, segregation, and bleeding in concrete making Fly Ash an excellent additive in concrete technology.
Environmental Benefits:
Fly Ash disposal from coal-fired power plants is a serious environmental problem. Fly ash utilization, especially in concrete, has significant environmental benefits including a net reduction in energy use and greenhouse gas, Reduction in the amount of coal combustion products that must be disposed of in landfills, and conservation of other natural resources and materials.
Products : Class C and Class F Fly Ash
Class C Fly ash
Class C is produced from the burning of sub-bituminous coal and lignite. Class C fly ash comes from coals which may produce an
ash with higher lime content — generally more than 15 percent often as high as 30 percent. Elevated lime may give Class C unique self-hardening characteristics.
class f fly ash
Class F is fly ash produced from burning anthracite or bituminous coal. Class F is fly ash produced from burning anthracite or bituminous coal, Class F is low in lime, under 15 percent, and contains a greater combination of silica, alumina and iron (greater
than 70 percent) than Class C fly ash.