Method for preventing corrosion of concrete members in tidal range zone and splash zone of ocean

Abstract

The invention discloses a method for preventing corrosion of concrete members in a tidal range zone and a splash zone of an ocean, belonging to the field of concrete member corrosion prevention. Aiming at the protection requirement in special corrosion environment, the method comprises the following steps: coating a layer of silane impregnant on the outer surface of concrete, wherein the penetration depth is more than 1mm; after natural air drying, coating a layer of silane end sealing polyether sealant in a scraping way, wherein the thickness is 2-5mm; then wrapping a prefabricated protective cover immediately; coating a layer of sealant in the protective cover in a scraping way; sealing the upper and lower ends and the corners of the protective cover with the sealant; and coating the whole wrapping system with weatherproof finishing paint. In the method, the glass reinforced plastic protection technology is adopted and combined with the sealing protection technology of the silane end sealing polyether sealant and the silane impregnating protection technology, thus realizing the effective protection on the concrete members in the tidal range zone and the splash zone. The technical construction is simple as well as convenient and fast, and the sealant has a reliable and excellent protection effect, therefore, the method has a good market popularization prospect.

Description

technical field [0001] The invention relates to a corrosion protection method for concrete components in ocean tidal range areas and splash areas, and belongs to the technical field of anti-corrosion engineering. Background technique [0002] In recent years, my country's economy has developed rapidly and investment in infrastructure has increased dramatically. Numerous concrete elements were built in it. As a non-metallic material, concrete is widely used in cross-sea bridges and coastal projects, and its corrosion in seawater is quite serious. The corrosion protection of concrete components has been paid enough attention by the technical personnel in the industry. People have realized that the corrosion of concrete components without any corrosion protection is very serious, and it is difficult to reach the designed service life. Even some concrete components have been destroyed in less than 10 years. Seriously corroded, it had to be overhauled, which cost a huge amount...

AI Technical Summary

Problems solved by technology

This method follows the anti-corrosion method of steel components. Its anti-corrosion method, process, coating components, and coating types are the same as those of steel components. This method of external coating protection does not take corresponding treatment according to the characteristics of concrete. Therefore, although it has a certain anti-corrosion effect, the disadvantages are also obvious.

First of all, the application of external coating method for concrete anti-corrosion, the adhesion between the coating and the concrete substrate is low, only 1~3MPa, the coating is easy to fall off and cause anti-corrosion failure; The coating requires about 4~7 coats of paint, and each coat needs a curing time of 4~24 hours before the next coat can be applied. Therefore, the painting cycle is very long. The project is difficult to carry out construction; finally, the durability of the paint coating in the marine environment is low, and it needs to be completely repaired in about 5~10 years, and the repair cost is even higher than the first painting

[0005] Since there has been no good way to solve the anti-corrosion problem of concrete components in the splash area and tidal range area, many concrete component projects still do not do any anti-corrosion treatment in this area, and the result will inevitably greatly reduce the durability of concrete components.