Proper

Abstract

In this study, as an experiment for replacing existing blast furnace slag using coal gasification melting slag (IGCC slag), the existing blast furnace slag cement ratio strength was changed according to the blast furnace slag pitch ratio of IGCC slag. We examined the cause of the reaction, the reaction by the chemical composition, and the microstructure of the IGCC slag re-used as an admixture for blast furnace slag cement specimens, and examined the effect of changing the value of Blaine. In the case of compounding, blast furnace slag cement (0 to 40 wt%) was substituted. The cement was fixed and the blast furnace slag ratio (0 to 40 wt%) was substituted, and the strength was measured until 3 to 28 days at room temperature. In case of IGCC slag, grain size was used for two kinds of about 2000Blaine and 4000Blaine, and the change of strength according to the substitution amount was observed. As the substitution amount of IGCC slag increased, the overall compressive strength decreased. As the powder of fine grains became finer, the initial strength increased to an insignificant level, and (the formation of Ettringite) intensity value was suppressed due to the formation of Ettringite by chemical reaction