A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
HIGH STRENGTH CEMENT AND HIGH STRENGTH CONCRETE
To provide high strength cement that has less chloride content and alkali content, can reduce an amount of use of a high performance water-reducing admixture and shorten the setting time, and can manufacture high strength concrete excellent in a strength development property and a shrinkage reduction effect.SOLUTION: A high strength concrete comprises: high strength cement in which a content of the particle less than or equal to 5 μm is 2 mass% or less and its median size is 15 μm or more; one or two or more selected from the group consisting of blast furnace slag fine powder, fly ash, and silica fume; and a high performance water-reducing admixture. The high strength cement includes 5 to 20 pts.mass of the one or two or more selected from the group consisting of blast furnace slag fine powder, fly ash, and silica fume and 0.5 to 5.0 pts.mass of the high performance water-reducing admixture, with respect to 100 pts.mass of the high strength cement. There is also provided a manufacturing method for the high strength concrete including pre-adsorption of the high performance water-reducing admixture.SELECTED DRAWING: None
【課題】 塩化物含有量やアルカリ含有量が少なく、高性能減水剤の使用量を減じることができ、凝結時間を短縮できて、かつ強度発現性・収縮低減効果に優れた高強度コンクリートを作製可能な高強度セメントを提供する。【解決手段】５μｍ以下の粒子の含有量が２質量％以下で、メジアン径が１５μｍ以上である高強度セメントと、高炉スラグ微粉末、フライアッシュ、シリカフュームから選ばれる１種又は２種以上と、高性能減水剤とを含有する高強度コンクリートであって、高強度セメント１００質量部に対して、高炉スラグ微粉末、フライアッシュ、シリカフュームから選ばれる１種又は２種以上が５〜２０質量部、高性能減水剤が０．５〜５．０質量部であることを特徴とする前記高強度セメントであり、高性能減水剤をプレ吸着させることを特徴とする前記高強度コンクリートの製造方法である。【選択図】 なし
HIGH STRENGTH CEMENT AND HIGH STRENGTH CONCRETE
To provide high strength cement that has less chloride content and alkali content, can reduce an amount of use of a high performance water-reducing admixture and shorten the setting time, and can manufacture high strength concrete excellent in a strength development property and a shrinkage reduction effect.SOLUTION: A high strength concrete comprises: high strength cement in which a content of the particle less than or equal to 5 μm is 2 mass% or less and its median size is 15 μm or more; one or two or more selected from the group consisting of blast furnace slag fine powder, fly ash, and silica fume; and a high performance water-reducing admixture. The high strength cement includes 5 to 20 pts.mass of the one or two or more selected from the group consisting of blast furnace slag fine powder, fly ash, and silica fume and 0.5 to 5.0 pts.mass of the high performance water-reducing admixture, with respect to 100 pts.mass of the high strength cement. There is also provided a manufacturing method for the high strength concrete including pre-adsorption of the high performance water-reducing admixture.SELECTED DRAWING: None
【課題】 塩化物含有量やアルカリ含有量が少なく、高性能減水剤の使用量を減じることができ、凝結時間を短縮できて、かつ強度発現性・収縮低減効果に優れた高強度コンクリートを作製可能な高強度セメントを提供する。【解決手段】５μｍ以下の粒子の含有量が２質量％以下で、メジアン径が１５μｍ以上である高強度セメントと、高炉スラグ微粉末、フライアッシュ、シリカフュームから選ばれる１種又は２種以上と、高性能減水剤とを含有する高強度コンクリートであって、高強度セメント１００質量部に対して、高炉スラグ微粉末、フライアッシュ、シリカフュームから選ばれる１種又は２種以上が５〜２０質量部、高性能減水剤が０．５〜５．０質量部であることを特徴とする前記高強度セメントであり、高性能減水剤をプレ吸着させることを特徴とする前記高強度コンクリートの製造方法である。【選択図】 なし
HIGH STRENGTH CEMENT AND HIGH STRENGTH CONCRETE
高強度セメント及び高強度コンクリート
HONMA KAZUYA (author) / TERAUCHI TAKASHI (author) / MAEDA TAKUMI (author) / MIYAGUCHI KATSUICHI (author) / MORIOKA MINORU (author)
2019-07-25
Patent
Electronic Resource
Japanese
IPC:
C04B
Kalk
,
LIME
High-early-strength concrete with Portland cement
| Engineering Index Backfile | 1936
Investigation on reinforced high strength cement concrete
| British Library Conference Proceedings | 1995
Strength Properties of High-Strength Concrete Using Low-Heat Portland Cement
| British Library Conference Proceedings | 1998
Triaxial Characterization of High-Strength Portland Cement Concrete
| British Library Online Contents | 1993