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US 6,149,725 AGranted
Injection cement comprising corrosion inhibitors
AssigneeSika AG, vorm. Kaspar Winkler & Co.
InventorsTheodor A. Burge, Franz Wombacher
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Abstract
An injection cement on the basis of micro cement is described that comprises corrosion inhibitors, preferably salt-like products of the neutralisation of amines with acids. Said cement is in particular suitable for the restoration and improvement of the corrosion resistance of buildings comprising fine cracks and cavities laying far below the surface.
Claims14
An injection cement comprising a micro cement and at least one corrosion inhibitor, wherein said inhibitor comprises an amino compound, a hydroxy amino compound, or a mixture thereof.
A method of preparing an injection cement, comprising:
- (a) grinding a cement to provide a micro cement and admixing said micro cement with at least one corrosion inhibitor, or
- (b) admixing a cement and at least one corrosion inhibitor, followed by grinding the cement to provide a micro cement;
- said corrosion inhibitor comprising an amino compound or a hydroxy amino compound.
Dependencies are inferred from the claim text.