Method for manufacturing concrete admixture using bottom ash and concrete admixture manufactured by the method

摘要

A method for manufacturing a concrete ash mixture contained in a waste as a bottom ash contained in a waste of a thermal power plant and an admixture prepared by the method are described. In this method, the bottom ash is classified and subjected to primary to secondary pulverization using at least one of a hammer, an impact, a roll crusher and a roller press to supply a lightweight aggregate, and a bottom ash which can not be used as a lightweight aggregate, The pulverized bottom ash is finely pulverized into fine powder having a particle size of 45 mu m with a grain size of not more than 70% using a wheat pulverizer to form a concrete admixture. According to the present invention, the bottom ash lump can be used to provide a concrete admixture or lightweight aggregate.