Preparation method for protective structure of concrete bridge anti-collision wall

Abstract

The invention relates to a preparation method for a protective structure of a concrete bridge anti-collision wall, which is applicable to the protective structure of the concrete bridge anti-collision wall and is also applicable to the protective structure of other concrete structures. The protective structure of the concrete bridge anti-collision wall consists of a permeable confining layer, an isolating layer and a surface coating, wherein the permeable confining layer adopts silane solution capable of permeating into 5-mm depth of the concrete structure surface layer, so the water absorbability of the concrete structure and the permeability of chloride are obviously reduced, and the original air permeability of the concrete structure is remained; and the isolating layer and the surfacecoating can prevent a corrosive medium from eroding and permeating the surface of the concrete structure. The construction process of the protective structure is simple, practical and convenient to use widely. An inorganic material and an organic material are combined together organically through chemical bonds under the action of silane and the isolating layer and the surface layer are provided,so that the effective protective structure is formed, the durability of the concrete is improved, the service life is prolonged, and considerable economic and social benefits are achieved.

Description

technical field [0001] The invention relates to a preparation method of a concrete bridge anti-collision wall protection structure, which is suitable for the protection structure of the concrete bridge anti-collision wall and also for the protection structures of other concrete structures. Background technique [0002] Concrete structures are widely used in building structures and are highly susceptible to corrosion. Therefore, the engineering design of concrete structures should not only consider the strength index, but also the durability of concrete structures is the most important thing. [0003] The survey of concrete structures in developed countries such as Europe and the United States shows that due to the durability of concrete structures, the cost of repair or renewal is 4 times or 6 times the construction cost of the year, and the expected life of concrete structures is 75-100 years. Therefore, concrete The anticorrosion work of structures must be designed, const...

AI Technical Summary

Problems solved by technology

[0004] As for the anti-collision wall with concrete structure, because the snow-melting agent or even salt is sprayed on the road in winter to remove snow, the local air humidity of the anti-collision wall is high, and the part is dry and wet Alternate, sufficient oxygen supply, water, oxygen, especially the intrusion of chloride ions can easily lead to corrosion of steel bars, and the volume expansion of steel bars after corrosion will be 2.5 times the original, resulting in cracks in the concrete anti-collision wall and accelerated corrosion. The result is a decrease in the strength of the concrete anti-collision wall. Affect the bearing capacity of the bridge and greatly shorten the service life of the bridge

[0005] As early as the 1970s, Europe, America, Australia and other places have widely used "silane impregnation technology" in the anticorrosion of various seaport projects, and it is the most widely used anticorrosion solution in the protection of highways and bridges in the United States. Because silane impregnating agents, especially isobutyl The excellent anti-corrosion effect, economical cost and simple construction technology of base (ene) triethoxysilane have been fully used in China, but it is not enough for the harsh salt environment because of its fast volatilization