Abstract: Subjected to water pressure, water erosion, freeze-thaw or dry-wet cycles, hydraulic structures are prone to suffer from leakage, aging, dissolution damage and corrosion, which shorten the service life of the buildings. We present some new protective materials for the concrete in hydraulic structures: anti-seepage and anti-cracking coating materials containing fluorinated polyurethane and fluorinated modified polyaspartic acid ester polyurea developed by means of polymerization reaction or physical addition with polyurethane and polyurea as the matrix; environmental-friendly water-based fluorocarbon resin coating prepared by copolymerizing trifluorovinyl chloride with different vinyl ethers and vinyl esters; and abrasion-resistant materials developed by using polyurea and vinyl ester resin as the matrix composite with nano-sized or micron inorganic particles. The above series of seepage control, crack resistance, anti-aging, and abrasion-resistant materials have been applied to the concrete’s surface protection of Danjiangkou dam heightening project, the concrete’s impact-resistance of Three Gorges ship lock gate wall and other projects. Field test and long service have proved good effect. The achievements offer basis for the development of hydraulic protective materials and the optimization of material performance.

Key words: hydraulic structure, concrete, seepage and crack resistance, anti-aging, anti-abrasion, coating material