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CEMENT COMPOSITION AND METHOD FOR MANUFACTURING ULTRA-HIGH STRENGTH CEMENTITIOUS HARDENED BODY
To increase the compressive strength of an ultra-high strength cementitious hardened body and reduce the shrinkage strain, and to simplify the manufacturing process of an ultra-high strength cementitious hardened body.SOLUTION: A cement composition contains low-heat Portland cement, silica fume with a BET specific surface area of 15-25 m2/g, an inorganic powder with a 50% volume cumulative particle size of 0.8-5 μm, aggregate A with a maximum particle size of 1.2 mm or less, a high-performance water reducing agent, an antifoaming agent and water. To the cement composition, a lightweight aggregate B is further added, in which the lightweight aggregate having a boiling water absorption ratio of 15% or more is made into a saturated water absorption state. An amount of the lightweight aggregate B added is 0.5-2.5 vol.% in a total of 100 vol.% of the aggregate A and the lightweight aggregate B.SELECTED DRAWING: Figure 1
【課題】超高強度セメント質硬化体の圧縮強度をより高く、収縮ひずみを低減することを可能とし、かつ超高強度セメント質硬化体の製造工程の簡略化を図る。【解決手段】低熱型ポルトランドセメント、ＢＥＴ比表面積が１５～２５ｍ２／ｇのシリカフューム、５０％体積累積粒径が０．８～５μｍの無機粉末、最大粒径が１．２ｍｍ以下である骨材Ａ、高性能減水剤、消泡剤および水を含むセメント組成物にさらに、煮沸吸水率が１５％以上の軽量骨材を飽和吸水状態にした軽量骨材Ｂが添加され、前記軽量骨材Ｂの添加量は、骨材Ａと軽量骨材Ｂの合計１００体積％において０．５～２．５体積％である。【選択図】図１
CEMENT COMPOSITION AND METHOD FOR MANUFACTURING ULTRA-HIGH STRENGTH CEMENTITIOUS HARDENED BODY
To increase the compressive strength of an ultra-high strength cementitious hardened body and reduce the shrinkage strain, and to simplify the manufacturing process of an ultra-high strength cementitious hardened body.SOLUTION: A cement composition contains low-heat Portland cement, silica fume with a BET specific surface area of 15-25 m2/g, an inorganic powder with a 50% volume cumulative particle size of 0.8-5 μm, aggregate A with a maximum particle size of 1.2 mm or less, a high-performance water reducing agent, an antifoaming agent and water. To the cement composition, a lightweight aggregate B is further added, in which the lightweight aggregate having a boiling water absorption ratio of 15% or more is made into a saturated water absorption state. An amount of the lightweight aggregate B added is 0.5-2.5 vol.% in a total of 100 vol.% of the aggregate A and the lightweight aggregate B.SELECTED DRAWING: Figure 1
【課題】超高強度セメント質硬化体の圧縮強度をより高く、収縮ひずみを低減することを可能とし、かつ超高強度セメント質硬化体の製造工程の簡略化を図る。【解決手段】低熱型ポルトランドセメント、ＢＥＴ比表面積が１５～２５ｍ２／ｇのシリカフューム、５０％体積累積粒径が０．８～５μｍの無機粉末、最大粒径が１．２ｍｍ以下である骨材Ａ、高性能減水剤、消泡剤および水を含むセメント組成物にさらに、煮沸吸水率が１５％以上の軽量骨材を飽和吸水状態にした軽量骨材Ｂが添加され、前記軽量骨材Ｂの添加量は、骨材Ａと軽量骨材Ｂの合計１００体積％において０．５～２．５体積％である。【選択図】図１
CEMENT COMPOSITION AND METHOD FOR MANUFACTURING ULTRA-HIGH STRENGTH CEMENTITIOUS HARDENED BODY
セメント組成物および超高強度セメント質硬化体の製造方法
KURONO JOTARO (author) / KONO KATSUYA (author)
2022-10-12
Patent
Electronic Resource
Japanese
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