C - Chemistry – Metallurgy – 09 – C
Patent
C - Chemistry, Metallurgy
09
C
C09C 1/24 (2006.01) C04B 14/30 (2006.01) C04B 16/00 (2006.01) C04B 28/02 (2006.01) C09C 3/08 (2006.01) C09D 17/00 (2006.01)
Patent
CA 2145354
The present invention relates to a composition containing in physical admixture an iron oxide pigment powder having an average particle size of less than 50 microns and 0.5 to 5% by weight, based on the weight of the pigment, of a water dispersible or water soluble lignin- containing compound, such composition containing less than 2 parts of pozzolan per 1 part of pigment. The present invention also relates to a process for the preparation of a colored concrete product by a) preparing a slurry containing an iron oxide pigment powder having an average particle size of less than 50 microns; 0.5 to 5% by weight, based on the weight of the pigment, of a water dispersible or water soluble lignin-containing compound; and at least a portion of the water necessary to form the colored concrete product, such slurry containing less than 2 parts of pozzolan per 1 part of pigment and b) mixing the resulting slurry with aggregate, cement and the remainder of the water, if any, to form the colored concrete product.
Corporation Bayer
Swabey Ogilvy Renault
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