Liquid additive for intergrinding cement

Details Liquid additive for intergrinding cement Liquid additive for intergrinding cement

C - Chemistry, Metallurgy

04

B

C04B 22/12 (2006.01)

Patent

CA 2553659

Exemplary compositions and methods for reducing hexavalent chromium in cementitious compositions involve the use of a liquid additive composition, comprising stannous chloride. Along with the stannous chloride may be used at least one co-additive comprising an antioxidant, oxygen scavenger, or mixture thereof, and/or at least one agent comprising a cement grinding aid, cement quality improver, or mixture thereof.

L'invention concerne des compositions et des procédés pour réduire la teneur en chrome hexavalent de compositions à base de ciment, une composition d'additif liquide contenant du chlorure stanneux étant utilisée à cet effet. Outre le chlorure stanneux, il est possible d'employer au moins un co-additif qui comprend un antioxydant, un absorbeur d'hydrogène, ou un mélange de ceux-ci, et/ou au moins un agent qui renferme un auxiliaire de broyage de ciment, un produit améliorant la qualité du ciment, ou un mélange de ceux-ci.

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