CONCRETE COMPOSITION AND HARDENED CONCRETE

To provide a concrete composition containing blast furnace slag, capable of reducing unit consumption of COof obtained hardened concrete and having excellent strength development property, and hardened concrete with reduced unit consumption of COand high strength.SOLUTION: The concrete composition a...

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Bibliographische Detailangaben
Hauptverfasser: YODA KAZUHISA, KANDA TETSUSHI, KOJIMA MASAO, ZEN SHINKAN, TAMAKI SHINJI, SAKATA NOBORU, SAITO KAZUHIDE, TSUJI DAIJIRO, MIZUNO TARO, MATSUSHITA TETSURO
Format: Patent
Sprache:eng ; jpn
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Zusammenfassung:To provide a concrete composition containing blast furnace slag, capable of reducing unit consumption of COof obtained hardened concrete and having excellent strength development property, and hardened concrete with reduced unit consumption of COand high strength.SOLUTION: The concrete composition and the hardened concrete include a binder, water, a fine aggregate, a coarse aggregate and an admixture, in which the binder contains 70 mass% or more and 100 mass% or less of blast furnace cement with respect to a total mass of the binder, the blast furnace cement contains 45 mass% to 75 mass% of a blast furnace slag fine powder with an average specific surface area of 2500 cm/g to 8000 cm/g, 20 mass% to 50 mass% of Portland cement and 1.0 mas% to 4.5 mas%, in terms of SO, of sulfate selected from anhydrous gypsum and dihydrate gypsum, and a total content of the blast furnace slag fine powder, the Portland cement and the sulfate is 100 mass% and a final setting time is 10 to 48 hours.SELECTED DRAWING: None 【課題】高炉スラグを含有し、得られるコンクリート硬化体のCO2原単位を削減でき、且つ、強度発現性に優れたコンクリート組成物、及びCO2原単位が削減され、且つ、強度が高いコンクリート硬化体を提供する。【解決手段】結合材、水、細骨材、粗骨材及び混和剤を含み、結合材は、結合材の全質量に対し、70質量%以上100質量%以下の高炉セメントを含有し、前記高炉セメントは、比表面積の平均が2500cm2/g〜8000cm2/gの高炉スラグ微粉末を45質量%〜75質量%と、ポルトランドセメントを20質量%〜50質量%と、無水石膏及び二水石膏から選ばれる硫酸塩をSO3換算で1.0質量%〜4.5質量%と、を含み、高炉スラグ微粉末と、ポルトランドセメントと、硫酸塩との合計含有量が100質量%であり、且つ、終結時間が10時間〜48時間であるコンクリート組成物、及びコンクリート硬化体。【選択図】なし