Use of alumina clay with cement fly ash mixtures

Details Use of alumina clay with cement fly ash mixtures Use of alumina clay with cement fly ash mixtures

C - Chemistry, Metallurgy

04

B

C04B 28/22 (2006.01) C04B 14/10 (2006.01) C04B 18/02 (2006.01) C04B 18/08 (2006.01) C04B 20/10 (2006.01) C04B 28/02 (2006.01)

Patent

CA 2170626

A cementitious mixture includes hydraulic cement, fly ash, and an effective amount of unfired nature finely divided material, such as a clay, containing at least about 35 % alumina, to accelerate the early strength of a mix. A method of accelerating early strength in a cementitious mix comprises the adding of alumina in the form of an unfired raw material, such as clay, in an effective amount in such mix.

L'invention concerne un mélange cimentaire incorporant du ciment hydraulique, des cendres volantes, et une quantité suffisante de matériau non calciné finement fractionné, tel que l'argile, contenant au minimum 35% d'alumine. Ce mélange permet d'accélérer la prise de résistance initiale du mélange. Le procédé d'accélération de la prise de résistance initiale d'un mélange cimentaire s'obtient par addition dans le mélange cimentaire d'une proportion suffisante d'alumine, sous forme de matériau brut non calciné tel que l'argile.

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