C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
C04B 7/02 (2006.01) C04B 7/00 (2006.01) C04B 7/19 (2006.01) C04B 18/08 (2006.01) C04B 28/04 (2006.01)
Patent
CA 2291843
An improvement is provided herein in cement for use in concrete of high strength and high flowability, mass concrete, shrinkage compensating concrete or concrete of high resistibility, which concretes are employed in the field of engineering and architecture or as building materials. The cement includes a cement clinker comprising A1 2O3 and Fe2O3, wherein the weight % ratio of A1 2O3 to Fe2O3 is 0.05 to 0.62, and a content of 3CaO-SiO2 is at least 35%. Thus, it has been found that, when the ratio of A1 2O3 to Fe2O3 is regulated to a value of 0.05 to 0.62, the strength of concrete of high strength and high flowability can further be improved, and the heat of hydration can be minimized, while the flowability of cement is improved and the long-term strength thereof can be maintained.
L'invention porte sur une amélioration apportée au ciment utilisé pour le béton de masse, le béton à haute résistance, le béton de haute fluidité, le béton non contractile et le béton de haute durabilité, dans les domaines du génie civil et de la construction, et utilisé également pour les matériaux de construction fabriqués par moulage par extrusion et par transformation en feuille. Lorsque le rapport de Al2O3 à Fe2O3 du mâchefer de ciment est ajusté à une valeur comprise entre 0,05 et 0,62, la résistance du béton haute résistance et haute fluidité peut être alors améliorée, et la chaleur d'hydratation peut être réduite lorsque la performance améliorant la fluidité et la résistance à long terme sont maintenues.
Akiyama Tatsushi
Ikabata Tatsuo
Nagaoka Seiichi
Yamamoto Takanori
Yasumoto Ayaji
Borden Ladner Gervais Llp
Sumitomo Osaka Cement Co. Ltd.
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