CONCRETE ADMIXTURE

CONCRETE ADMIXTURE

PROBLEM TO BE SOLVED: To provide a concrete admixture capable of improving the flowability of concrete even in a low water-powder ratio and reducing the setting time compared to silica fume which is conventionally used. SOLUTION: The concrete admixture comprises lightweight calcium carbonate having...

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Bibliographische Detailangaben
Hauptverfasser: YAMADA KAZUO, TSUKADA KAZUHISA, HIRAO CHU
Format: Patent
Sprache:eng
Schlagworte:
ARTIFICIAL STONE
CEMENTS
CERAMICS
CHEMISTRY
COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS
CONCRETE
LIME, MAGNESIA
METALLURGY
REFRACTORIES
SLAG
TREATMENT OF NATURAL STONE
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Beschreibung
Zusammenfassung:PROBLEM TO BE SOLVED: To provide a concrete admixture capable of improving the flowability of concrete even in a low water-powder ratio and reducing the setting time compared to silica fume which is conventionally used. SOLUTION: The concrete admixture comprises lightweight calcium carbonate having ≤2.5 μm, preferably ≤1.0 μm and particularly preferably ≤0.7 μm average particle diameter. The BET specific surface area of the lightweight calcium carbonate is preferably 2-15 m2/g, more preferably 3-13 m2/g and particularly preferably 5-11 m2/g. COPYRIGHT: (C)2009,JPO&INPIT