Process to reduce the amount of cr (vi) in a...

Details Process to reduce the amount of cr (vi) in a... Process to reduce the amount of cr (vi) in a...

C - Chemistry, Metallurgy

04

B

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

Patent

CA 2687164

A method for producing a cement-containing material, in particular a cement-containing material having a low content of soluble Cr (Vl) which comprises the step of providing a cement-containing material with metallic sulphate particles coated with at least one product of the hydrolysis of a collagen material such as gelatine. It is also provided a method for reducing the content of Cr (Vl) in a cement-containing material and a cement-containing composition which comprises a cement and a metallic sulphate particles coated with at least one product of the hydrolysis of a collagen material. It is further provided the use of metallic sulphate particles coated with a collagen derived material as an additive in a cement-containing composition.

L'invention porte sur un procédé de fabrication d'un matériau contenant du ciment, en particulier d'un matériau contenant du ciment ayant une faible teneur en Cr (VI) soluble. Ce procédé comprend l'étape consistant à se procurer un matériau contenant du ciment avec des particules de sulfate métallique enrobées par au moins un produit de l'hydrolyse d'un matériau en collagène, telle que la gélatine. L'invention porte également sur un procédé permettant de réduire la teneur de Cr (VI) dans un matériau contenant du ciment et sur une composition contenant du ciment qui comprend un ciment et des particules de sulfate métallique enrobées par au moins un produit de l'hydrolyse d'un matériau en collagène. L'invention porte aussi sur l'utilisation de particules de sulfate métallique enrobées par un matériau dérivé du collagène comme additif dans une composition contenant du ciment.

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