Steel corrosion-inhibiting and protective coating with self-repairing function and method for preparing coating

Abstract

The invention relates to an environment-friendly steel protecting and repairing coating for concrete structures and a method for preparing the coating. The coating is compounded by components including, by mass, from 0.5 to 10% of organic corrosion inhibitor, from 5 to 35% of thermoplastic or thermosetting resin for realizing toughness and a waterproof sealing performance for a cement base material, from 15 to 50% of cement, from 0 to 4% of surfactant, from 0 to 5% of superfine fibers and the balance water component. The environment-friendly steel protecting and repairing coating in the technical scheme is particularly suitable for protecting the surface of steel exposed outside for a long time and coating to protect the surface of reinforcing steel for a high-durability concrete structure in a harsh environment, can permeate into a concrete base with extremely fine capillary channels and a complicated geometric structure, and accordingly is also applicable to durability repair for damaged concrete structures.

Description

technical field [0001] The invention relates to a self-repairing antirust and protective coating for steel bars and a preparation method thereof. Background technique [0002] The steel bars in the marine environment and the deiced concrete structure are easily corroded by chloride salts, and the durability and service life of the corroded concrete structure will be greatly reduced. The steel bars in many concrete structures corrode in a short period of time, which not only endangers the safety of structures, but also brings huge economic losses, and even becomes a heavy burden for economic development. Therefore, how to prevent the steel bars in concrete structures from corroding too quickly or to repair the damaged steel bars in concrete structures that have suffered from chloride corrosion has become the key to maintaining and improving the durability of concrete structures in harsh environments. The rapid development and application of high-performance concrete in recen...

AI Technical Summary

Problems solved by technology

[0005] In addition, in recent years, all kinds of large-volume, super-long and super high-rise buildings have emerged in an endless stream. In order to meet the functional needs and reduce the temperature stress of concrete, solve the deformation problem of super-long reinforced concrete and the settlement difference between the main body and skirt room of high-rise buildings, often in In the cast-in-place concrete structure, post-cast belt construction is introduced, but the steel bars in the post-cast belt are exposed for a relatively long period of time (sometimes as long as several months), and these steel bars are prone to rust when exposed to wind and rain; more The common situation is that many steel bars have been piled up in the open air for a long time. These steel bars will be more or less corroded when they are poured in the future, which will leave hidden dangers to the concrete structure. Therefore, how to protect the steel bars stored in the open air or under construction from corrosion It is also an important issue that cannot be ignored at present

Images