Method of making blended cement compositons

Details Method of making blended cement compositons Method of making blended cement compositons

C - Chemistry, Metallurgy

04

B

C04B 7/52 (2006.01) C04B 7/13 (2006.01) C04B 7/19 (2006.01) C04B 24/22 (2006.01) C04B 28/04 (2006.01)

Patent

CA 2240291

A method of preparing a blended cement composition is provided. The method comprises intergrinding a composition comprised of a major amount by weight of portland cement clinker, a minor amount by weight of a pozzolanic material and a grinding aid in an amount of from about 0.1 % to about 5 % based on the total weight of portland cement clinker and pozzolanic material, said grinding aid being comprised of a naphthalenesulfonate formaldehyde condensate.

La présente invention concerne un procédé de préparation d'une composition de ciment de mélange. Ce procédé comprend le broyage d'une composition comprenant une proportion très importante, en poids, de clinker de ciment portland, une faible proportion en poids de pouzzolane et un auxiliaire de broyage dans une proportion d'environ 0,1 % à environ 5 % par rapport au poids total de clinker de ciment portland et de pouzzolane. Cet auxiliaire de broyage est constitué par un condensat de formaldéhyde de naphtalènesulfonate.

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