Cement composition and hydraulic composition
AssigneeTaiheiyo Cement Corporation
InventorsKazuki Kobayashi, Yoshifumi Ohgi, Masayuki Hashimoto, Yoshifumi Hosokawa
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Abstract
A cement composition including, a cement admixture exhibiting excellent strength developability, capable of reducing the total amount of carbon dioxide emitted by absorbing and fixing a large amount of carbon dioxide during a curing process; and a hydraulic composition including the cement composition. A cement composition comprising: (A) a powdery cement-containing material containing (i) Portland cement or a ground product of Portland cement clinker, and (ii) a ground product of a fired product that contains 2CaO·SiO2 and 2CaO·Al2O3·SiO2.
Claims15
A cement composition, comprising:
- (A) a powdery cement-containing material containing
- (i) Portland cement or a ground product of Portland cement clinker, and
- (ii) a ground product of a fired product that contains 2CaO·SiO2 and 2CaO·Al2O3·SiO2 and satisfies the following conditions (1) and (2);
- and
- (B) (iii) an amine:
- (1) an amount of the 2CaO·Al2O3·SiO2 is from 10 parts by mass to 100 parts by mass with respect to 100 parts by mass of the 2CaO·SiO2;
- and
- (2) the fired product is free of 3CaO·Al2O3 or contains 3CaO·Al2O3 in an amount of 15 parts by mass or less with respect to 100 parts by mass of the 2CaO·SiO2.
A cement composition, comprising:
- (i) Portland cement or a ground product of Portland cement clinker;
- (ii) a ground product of a fired product that contains 2CaO·SiO2 and 2CaO·Al2O3·SiO2 and satisfies the following conditions (1) and (2);
- and
- (iv) an alkaline earth metal-containing material except for the component (i) and the component (ii),
- wherein a content ratio of an alkaline earth metal in the cement composition is from 0.1 mass % to 10 mass % in terms of oxide, provided that only magnesium oxide, magnesium hydroxide, calcium oxide, and calcium hydroxide are included as the alkaline earth metal other than the alkaline earth metal included in the alkaline earth metal-containing material:
- (1) an amount of the 2CaO·Al2O3·SiO2 is from 10 parts by mass to 100 parts by mass with respect to 100 parts by mass of the 2CaO·SiO2;
- and
- (2) the fired product is free of 3CaO·Al2O3 or contains 3CaO·Al2O3 in an amount of 15 parts by mass or less with respect to 100 parts by mass of the 2CaO·SiO2.
Dependencies are inferred from the claim text.