METHOD FOR MANUFACTURING CEMENT ADDITIVE USING SLAG FROM PRETREATMENT OF HOT META

摘要

PURPOSE: A method for manufacturing cement mixing material using slag of pretreatment of molten pig iron is provided to improve compression strength and to reduce crack of concrete. CONSTITUTION: A method for manufacturing cement mixing material using slag of pretreatment of molten pig iron comprises: a step of cooling the slag in wet method; a step of selecting magnetic force to classify magnetic material and non-magnetic material; a step of pulverizing non-magnetic material in a fineness of 2800-8000cm^2/g; and a step of mixing unpulverized non-magnetic material with cement. The method further comprises a step of reducing concrete dry shrinkage deformation by mixing 10-40% of unpulverized non-magnetic material with cement.