All Carbon Corporation ( ACC) is a professional supplier of building materials in China. We can offer you quality fly ash Type F with different fineness ( R-12/ R-25/ R-45) in accordance with ASTM C618 at a competitive price. Fly ash is a fine, glass-like powder recovered from gases created by Coal-fired Electric Power Generation. It is an economic replacement for Portland cement used in concrete, while it actually improves strength, segregation, and ease of pumping of the concrete. Fly ash is also used as an ingredient in brick, block, paving, and structural fills. For more details, welcome your visit our website at www.allcarbon.com.cn. Any interesting there, pls let us know.