Sulfomethylolated lignin-based concrete admixtures

C - Chemistry – Metallurgy – 04 – B

Patent

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Details

C04B 24/18 (2006.01) C04B 28/02 (2006.01)

Patent

CA 2231630

The invention provides for an admixture for reducing the water content of a concrete mix. The admixture comprises an alkaline solution of a lignin in a sulfomethylolated form. The sulfomethylolated lignin in the admixture can also be cross-linked with a cross-linking agent. The admixture further comprises an air detrainer. Also provided are novel cement compositions comprising the admixture of the invention.

L'invention concerne un adjuvant permettant de diminuer la teneur en eau d'un mélange de béton. L'adjuvant comprend une solution alcaline d'une lignine sous forme sulfométhylolatée. La lignine sulfométhylolatée contenue dans l'adjuvant peut également être réticulée par un agent de réticulation. L'adjuvant comprend en outre un entraîneur d'air. L'invention concerne également des compositions de ciment originales contenant ledit adjuvant.

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