Patent ID: 8257486
Filing Date: 2012-09-04
Classification: C04B,Y02W

Abstract:
1. A composition for building material comprising: (a) ash in the range of 80 to 98% by weight; (b) 1 to 10% by wt of chemical activator comprising hydroxides selected from hydroxides of aluminum, hydroxides of sodium, hydroxides of potassium, or a combination thereof, sulfates selected from sulfates of aluminum, sulfates of sodium, sulfates of potassium, or a combination thereof, and chemical salts selected from the group consisting of calcium acetate, magnesium acetate, calcium chloride, magnesium chloride, or a combination thereof; (c) 2 to 18% of additive materials; and (d) balance water, wherein: the sources of the ash are the combustion residue of pulverized coal of thermal power stations collected in form of fly ash and bottom ash in hoppers or silos or disposed in slurry pond and mixtures thereof, and the additive materials are selected from the group consisting of fine to granular particles of metallurgical slag, waste aluminous refractory, slag wool, building material debris, resins and plastics, red mud of Bayer's alumina process, aluminous and alumino-silicate type of clay and mining wastes and mixtures thereof comprising of finer fractions of below 100 mesh size and coarse granular fractions of 2 mm and above size.