HYDRAULIC CEMENT COMPOSITION

摘要

PROBLEM TO BE SOLVED: To provide a hydraulic cement composition whose object is a structural body not necessarily needing alkalinity, whose main is blast furnace slag and where CO2emission is drastically reduced.

SOLUTION: The hydraulic cement composition includes 10-30 pts.mass of reproduced concrete fine powder containing 3-15 mass% of calcium hydroxide separated from demolished concrete and 100 pts.mass of a mixture of 60-90 mass% blast furnace slag fine powder having a fineness of 3,000-13,000 cm2/g, 5-20 mass% gypsum and 5-35 mass% portland cement.

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