CONCRETE WITH HIGH FLUIDITY

CONCRETE WITH HIGH FLUIDITY

PROBLEM TO BE SOLVED: To provide concrete of high fluidity with a reduced unit cement content.SOLUTION: Concrete with high fluidity contains cement, water, aggregate, a thickener, and a high-performance AE water-reducing agent. The thickener includes water-soluble cellulose ether, an antifoaming age...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: SAKURAI KUNIAKI, YAMAKAWA TSUTOMU
Format: Patent
Sprache:eng ; jpn
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 concrete of high fluidity with a reduced unit cement content.SOLUTION: Concrete with high fluidity contains cement, water, aggregate, a thickener, and a high-performance AE water-reducing agent. The thickener includes water-soluble cellulose ether, an antifoaming agent, and a gum. The high-performance AE water-reducing agent has a water-reducing rate of 18% or more in accordance with JISA6204. The concrete has a water cement ratio of 46.1% or more and 65% or less, and a slump flow of 35 cm or more and 75 cm or less. Preferably, the slump flow is 55 cm or more and 50 cm or less, and the 500 mm flow reaching time is 3-15 seconds.SELECTED DRAWING: None 【課題】単位セメント量を抑えた流動性の高いコンクリートの提供。【解決手段】セメント、水、骨材、増粘剤、及び高性能ＡＥ減水剤を含む流動性の高いコンクリートであって、前記増粘剤が、水溶性セルロースエーテル、消泡剤、及びガム類を含み、前記高性能ＡＥ減水剤は、ＪＩＳＡ６２０４に規定される減水率が１８％以上であり、水セメント比は４６．１％以上６５％以下であり、スランプフローは３５ｃｍ以上７５ｃｍ以下である。好ましくは、スランプフローが５５ｃｍ以上５０ｃｍ以下、かつ５００ｍｍフロー到達時間が、３〜１５秒である。【選択図】なし