Patent ID: 8152917
Filing Date: 2012-04-10
Classification: B28C,C04B,Y02W

Abstract:
1. A method for manufacturing concrete bodies including a mass of arc furnace dust at elevated temperatures to provide improved compressive strength and slump retention capability, said method comprising the steps of: providing masses of hydraulic cement, aggregate, water and electric arc furnace dust (EAFD); bringing the masses of aggregate and water to a temperature of between 32° C. and 45° C.; mixing the masses of hydraulic cement, EAFD and heated water and heated aggregate to form a heated mixture with a temperature of between about 32° C. and about 45° C.; casting the mixture at a temperature of between about 32° C. and 45° C. to produce a concrete form with improved compressive strength and slump retention capability; and in which a portion of the mass of cement is replaced by electric arc furnace dust in an amount of about 1% to less than or equal to 4% based on the amount of cement by weight.