Railway structure concrete protecting coating and preparation method and using method thereof

Abstract

The invention provides railway structure concrete protecting coating and a preparation method and a using method thereof. The protecting coating comprises a sealing primer layer, a polyurethane middlepaint layer and a fluorocarbon finish paint layer. The protecting coating has excellent adhesion; when the protecting coating is used for protecting a railway concrete bridge, the protecting coatingcan avoid occurrence of a situation that the railway concrete bridge cracks first and then is repaired in a special environmental region, significantly improves the durability of the railway concretebridge, prolongs the service life the railway concrete bridge, can achieve an excellent concrete protecting effect in the case of relatively thin concrete bridge coating thickness, and is convenient and fast to use; the protecting coating can also be used for protecting the surface of a ballastless track structure, and when the protecting coating is applied to the surface of a concrete track plateunder a steel rail or the surface of a ballast bed plate, the temperature difference between day and night due to sunlight irradiation can be reduced, the warpage amount of the track plate can be reduced, the open joints of plate corners or upwarp of the ballast bed plate or other damages can be reduced or even eliminated, and the effect of improving the durability of a ballastless track high-speed railway with a strict requirement on the smoothness is relatively good.

Description

technical field [0001] The invention relates to a protective coating for improving the durability of main structure concrete in the field of railway civil engineering, covering the field of durability protection of concrete prefabricated components and pouring objects, and particularly relates to a protective coating for railway concrete bridges and high-speed rail ballastless track protection in harsh environments Coatings and methods of making and using same. Background technique [0002] With the implementation of strategies such as my country's western development, revitalization of the Northeast, and the "One Belt, One Road" strategy, railways are gradually being constructed in special areas such as extreme cold, large temperature differences, dryness, and acid rain corrosion environments. For the 100-year design service life of railway bridges, Concrete bridge structures will face severe tests and there are great uncertainties. For example, the cracking problem of conc...

AI Technical Summary

Problems solved by technology

Although the cracks in the concrete of railway bridges have been improved by taking maintenance measures such as grouting and sealing of harmful cracks, the maintenance of bridge cracks in the operation process has difficulties in construction, high technical professional requirements, and the time available for maintenance every year Short, maintenance quality is difficult to guarantee, etc.

[0003] At present, neither the railway concrete bridge nor the ballastless track of the high-speed railway has a protection system against harsh environmental conditions.

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