ACTIVATION OF BLAST FURNACE SLAG, CEMENT AND CONCRETE USING WASTED NA2SO4 FROM DESULFURIZATION PROCESS

摘要

Blast furnace slag using waste soda sulphate and an activating method for cement and concrete are provided to recycle the waste soda sulphate as an activating agent in order to supplement the properties of the cement. A method for activating blast furnace slag cement and concrete comprises the following steps of: preparing waste soda sulphate; and adding the waste soda sulphate to the blast furnace slag cement and concrete so as to show excellent intensity. The waste soda sulphate consists of 54-67% of sodium sulfate(Na2SO4), 8-14% of sulfur(S), 3-5% of sodium carbonate(Na2CO3), 3-10% of iron oxide(T.Fe) and 1.5-4% of metallic iron(M.Fe). The waste soda sulphate functions as an activating agent for concrete and cement.