CEMENT COMPOSITION

PROBLEM TO BE SOLVED: To provide a cement composition for mortar and concrete which has excellent fluidity, a short kneading time and ultra-high strength developing properties.SOLUTION: A cement composition comprises: 65-90 mass% of Portland cement; 5-15 mass% of silica fume; and 5-20 mass% of fine...

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Hauptverfasser:	TANIMURA MITSURU, MAEHORI SHINPEI, SUGIYAMA SHINGO, MORI HIROAKI
Format:	Patent
Sprache:	eng
Schlagworte:	ARTIFICIAL STONE CEMENTS CERAMICS CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATERTREATMENT OR WASTE MANAGEMENT COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS CONCRETE GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS LIME, MAGNESIA METALLURGY REFRACTORIES SLAG TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TREATMENT OF NATURAL STONE
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a cement composition for mortar and concrete which has excellent fluidity, a short kneading time and ultra-high strength developing properties.SOLUTION: A cement composition comprises: 65-90 mass% of Portland cement; 5-15 mass% of silica fume; and 5-20 mass% of fine powder of limestone. The silica fume has a BET specific surface area of 5-18 m/g, and the particle size distribution of the fine powder of limestone is 99 vol.% or more particles of particle sizes of 10 μm or smaller, 95 vol.% or more of particles of particle sizes of 5 μm or smaller, 70-93 vol.% of particles of particle sizes of 2 μm or smaller, 27-50 vol.% of particles of particle sizes of 1 μm or smaller and 15 vol.% or less of particles of particle sizes of 0.5 μm or smaller.