Filler having blast furnace slag fine particles as main material

Abstract

To provide a filler that can contribute to realization of a decarbonized society, and has blast furnace slag fine particles with excellent filling performance as a main material.SOLUTION: This filler is formed by using blast furnace slag fine particles and gypsum as a binder, and mixing bentonite as an admixture into the binder, where the concentration of bentonite to water is 5 to 8 mass%, and the addition rate of gypsum to the binder is 2 to 6 mass%. The content rate of sulfur trioxide contained in the binder is 1.4 to 2.4 mass%. The water-binder ratio is 100 to 150 mass%. Hemihydrate gypsum is used as the gypsum.SELECTED DRAWING: Figure 5

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