Coating Method for Improving the Concrete Carbonization Resistance of Sanhe Navigation Lock

After running for 30 years,carbonization,cracks and corrosion of steel have occurred on the surface of the concrete of Sanhe navigation lock which was built in 1970.The performance of waterproof agent of U-seal and Super Pro-seal,the technology and methods of coating for improving the carbonization resistance of the concrete surface in the upstream and downstream gates are introduced.The application results show that the surface of the concrete is smooth and hard ,and there is no shedding and cracks.