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CEMENT COMPOSITION AND METHOD FOR PRODUCING CEMENT HARDENING BODY
To provide a cement composition having excellent flowability before cured, exhibiting large strength (compressive strength and bending strength) after cured, and having excellent corrosion resistance.SOLUTION: A cement composition includes: Portland cement; a silica fume having a BET specific surface area of 15 to 25 m2/g; an inorganic powder having a 50% cumulative particle size of 0.8 to 5 μm; an aggregate A having a maximum particle size of 1.2 mm or less; an aramid fiber having a diameter of 0.005 to 1.0 mm and a length of 2 to 30 mm; a high-performance water-reducing agent; an antifoaming agent; and water. In the cement composition, a ratio of belite is 50.0 to 65.0 mass%; the ratio of aluminate phase (3CaO Al2O3) is 1.0 to 2.4 mass%; and a ratio of Portland cement is 55 to 65 vol%, a ratio of the silica fume is 5 to 25 vol% and a ratio of the inorganic powder is 15 to 35 vol% each in 100 vol% of the total amount of Portland cement, the silica fume and the inorganic powder.SELECTED DRAWING: None
【課題】硬化前には優れた流動性を有し、硬化後には大きな強度（圧縮強度及び曲げ強度）を発現することができ、かつ、耐腐食性に優れたセメント組成物を提供する。【解決手段】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以下の骨材Ａ、直径が０．００５〜１．０ｍｍでかつ長さが２〜３０ｍｍのアラミド繊維、高性能減水剤、消泡剤及び水を含むセメント組成物であって、ポルトランドセメント中、ビーライトの割合が５０．０〜６５．０質量％、アルミネート相（３ＣａＯ・Ａｌ２Ｏ３）の割合が１．０〜２．４質量％であり、ポルトランドセメント、シリカフューム及び無機粉末の合計量１００体積％中、ポルトランドセメントの割合が５５〜６５体積％、シリカフュームの割合が５〜２５体積％、無機粉末の割合が１５〜３５体積％であるセメント組成物。【選択図】なし
CEMENT COMPOSITION AND METHOD FOR PRODUCING CEMENT HARDENING BODY
To provide a cement composition having excellent flowability before cured, exhibiting large strength (compressive strength and bending strength) after cured, and having excellent corrosion resistance.SOLUTION: A cement composition includes: Portland cement; a silica fume having a BET specific surface area of 15 to 25 m2/g; an inorganic powder having a 50% cumulative particle size of 0.8 to 5 μm; an aggregate A having a maximum particle size of 1.2 mm or less; an aramid fiber having a diameter of 0.005 to 1.0 mm and a length of 2 to 30 mm; a high-performance water-reducing agent; an antifoaming agent; and water. In the cement composition, a ratio of belite is 50.0 to 65.0 mass%; the ratio of aluminate phase (3CaO Al2O3) is 1.0 to 2.4 mass%; and a ratio of Portland cement is 55 to 65 vol%, a ratio of the silica fume is 5 to 25 vol% and a ratio of the inorganic powder is 15 to 35 vol% each in 100 vol% of the total amount of Portland cement, the silica fume and the inorganic powder.SELECTED DRAWING: None
【課題】硬化前には優れた流動性を有し、硬化後には大きな強度（圧縮強度及び曲げ強度）を発現することができ、かつ、耐腐食性に優れたセメント組成物を提供する。【解決手段】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以下の骨材Ａ、直径が０．００５〜１．０ｍｍでかつ長さが２〜３０ｍｍのアラミド繊維、高性能減水剤、消泡剤及び水を含むセメント組成物であって、ポルトランドセメント中、ビーライトの割合が５０．０〜６５．０質量％、アルミネート相（３ＣａＯ・Ａｌ２Ｏ３）の割合が１．０〜２．４質量％であり、ポルトランドセメント、シリカフューム及び無機粉末の合計量１００体積％中、ポルトランドセメントの割合が５５〜６５体積％、シリカフュームの割合が５〜２５体積％、無機粉末の割合が１５〜３５体積％であるセメント組成物。【選択図】なし
CEMENT COMPOSITION AND METHOD FOR PRODUCING CEMENT HARDENING BODY
セメント組成物、及びセメント質硬化体の製造方法
YASUDA EIKI (author) / KOGAME DAISUKE (author) / KONO KATSUYA (author) / OKAMURA SHUHEI (author)
2021-06-10
Patent
Electronic Resource
Japanese
IPC:
C04B
Kalk
,
LIME
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