ULTRA-HIGH-STRENGTH HIGH-FLUIDITY CEMENT COMPOSITION AND HARDENED PRODUCT OF ULTRA-HIGH-STRENGTH HIGH-FLUIDITY CEMENT

摘要

PROBLEM TO BE SOLVED: To provide an ultra-high-strength high-fluidity cement composition which has a high strength development and a high fluidity and is capable of achieving a compressive strength of >200 N/mm2, even in an ultra-high-strength region characterized by a water-binder ratio of≤18.0%, and a hardened body of an ultra-high-strength high-fluidity cement.

SOLUTION: The ultra-high-strength high-fluidity cement composition comprises: a hydraulic binder prepared by replacing 10-30 wt.% of cement by a silica fine powder having a specific surface area measured by the BET method of 1-20 m2/g; one or more kinds of artificial high-density fine aggregate(s) having a maximum grain size of≤1.2 mm, a density in oven-dry condition of≥2.90 g/cm3and a water absorption of≤0.90% and a chemical admixture, and chosen from the group consisting of a ferronickel slag fine aggregate, a copper slag fine aggregate and an electric arc furnace oxidizing slag fine aggregate; and a chemical admixture.

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