LOW-GRADE BLAST FURNACE SLAG-MIXED CEMENT COMPOSITION, AND PRODUCTION METHOD THEREOF

摘要

PROBLEM TO BE SOLVED: To provide a low-grade blast furnace slag-mixed cement composition which exhibits excellent strength development even when the blast furnace slag, the basicity of which does not meet the JIS standard, is used.SOLUTION: The low-grade blast furnace slag-mixed cement composition contains: a cement composition comprising cement clinker and gypsum; and the blast furnace slag. The basicity of the blast furnace slag is equal to or higher than 1.4 or lower than 1.6 and the content of the blast furnace slag exceeds 1 mass% and is equal to or lower than 15 mass%. A production method of the low-grade blast furnace slag-mixed cement composition comprises a step of mixing the cement clinker, the gypsum, and the blast furnace slag having the basicity equal to or higher than 1.4 or lower than 1.6 so that the content of the blast furnace slag exceeds 1 mass% and is equal to or lower than 15 mass% to prepare the low-grade blast furnace slag-mixed cement composition.