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Size reduction of cementitious material

By Gerald Ondrey |

Flyanic LLC (Newark, N.J.; www.flyanic.com) has developed an industrial-scale and economical process for grinding cement, flyash and other cementitious materials to a median particle size of 1 micron, making them suitable for use in concrete and mortar. For example, flyash and slag ground less than 10 microns are highly reactive pozzolans for building products, such as high-performance structural concrete. Up to now it has not been possible to produce a 1-micron flyash product economically, says the firm. The processing costs have been reduced to the range of $30–77 per ton, depending on the feedstock, and can be scaled to industrial production levels. Flyanic has licensed the patented technology (U.S. No. 6,802,898), which was developed by the New Jersey Institute of Technology (NJIT; Newark; www.njit.edu) involving years of R&D with cooperation from energy and cement companies. Together with its development partner, RSG Inc. (Sylacauga, Ala.; www.ultrafinegrind.com), Flyanic recently applied this new size-reduction technology to the design of a vertical stirred-media mill to perform pilot-scale demonstrations. The company can arrange a sustained demonstration of the technology at a truckload scale, with a production rate…
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