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Nanotechnology protection method for existing bridge structures

A bridge structure and nanotechnology technology, applied in bridges, bridge materials, bridge maintenance, etc., can solve the problems of ineffective protection of concrete, inability to protect concrete, and achieve the effect of resisting ultraviolet radiation, enhancing protection hardness, and good durability

Active Publication Date: 2016-06-22
HEFEI KALESITONG BUILDING MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] It can be seen that the existing protection methods cannot effectively protect the internal structure of the concrete, and the existing protective coatings cannot effectively protect the interior of the concrete, and further improvement is urgently needed

Method used

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  • Nanotechnology protection method for existing bridge structures
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preparation example Construction

[0052] The specific preparation method of the nano-silicon coating is as follows: wherein, in the nano-coating, the total ratio of component A: component B is 3:1. In the specific operation, first pour in component A, then pour in component B and then stir evenly. After mixing, let it stand for 3 hours before painting. By brushing the concrete surface in step H and step I, the concrete surface is coated with two layers of nano-silicon paint, which has very good anti-corrosion performance, and can better prevent artificial graffiti on the surface, which affects the appearance.

[0053] Preferably, the construction conditions of epoxy mortar, epoxy varnish, epoxy topcoat and nano-silicon coating are: the relative humidity of the environment is below 85%, and the ambient temperature is greater than 5°C.

[0054] In the present invention, in step B to step H, prove through a large amount of experiments, preferably control the construction time interval of each step, preferably con...

Embodiment 1

[0056] Please refer to figure 1 and figure 2 As shown, the specific application examples of the nanotechnology protection method of the current bridge structure.

[0057] First the loose concrete 3 on the surface of the existing bridge structure is chiseled out, and the exposed steel bar 1 is derusted, brushed with a rust inhibitor, and the epoxy mortar 2 prepared by the coarse sand of the present invention is repaired to the potholes chiseled out, After repairing, the concrete surface layer 21 is further repaired and leveled with epoxy mortar prepared with fine sand, and after the repairing and leveling is completed, the carbonized concrete on the surface layer is polished.

[0058] After the surface treatment, apply a layer of epoxy varnish 4 as a sealing primer, then further brush two layers of colored epoxy topcoat 5, and finally use nano-coating on the concrete surface to form the first nano-coating layer 6 , The second layer of nano-coating layer 7 is painted on the k...

Embodiment 2

[0060] Please refer to figure 2 As shown, the first coat of epoxy varnish 4 is applied on the surface of the concrete, the second coat of colored epoxy topcoat is applied 24 hours later, and the third coat of colored epoxy topcoat 5 is applied after 24 hours After 48 hours, the first layer of nano-coating layer 6 is applied, and after another 48 hours, the second layer of nano-coating layer 7 is partially applied to finally form a protective layer inside and on the surface of the concrete. This protective layer can effectively resist ultraviolet radiation, strengthen Protect hardness, improve acid and alkali resistance. Experiments prove that the construction method of the present invention has better protection effect. Compared with existing construction methods, it has better durability and more effectively protects the internal structure of concrete.

[0061] Nano coating of the present invention is SiO 2 Nanoparticles, using a two-component, the nanocoating based on Si...

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Abstract

The invention discloses a nanotechnology protection method for existing bridge structures. The nanotechnology protection method comprises the steps of A, removing loose concrete and removing rust of exposed steel bars; B, repairing pit holes through epoxy mortar made of coarse sand of 40-80 meshes; and C, repairing the surfaces of the pit holes through epoxy mortar made of fine sand of 80-120 meshes. According to the nanotechnology protection method for the existing bridge structures, SiO2 nano-particles are adopted as nano-coatings, the performance of isolating air can be greatly improved, the nano-coatings can be solidified at normal temperature and form a compact and stable protective film on the surface of protected base material, the air and water can be isolated, ultraviolet radiation can be effectively resisted, the protection rigidity can be improved, the acid resistance and the alkali resistance can be improved, the surface of the protected base material can have the long-term protection effect of being high in weather resistance, resistant to corrosion, easy to clean and super-hydrophobic, reinforced concrete can be effectively protected, and the durability of the structures can be improved.

Description

technical field [0001] The invention relates to a nanotechnology protection method for a base material, in particular to a nanotechnology protection method for an existing bridge structure. Background technique [0002] Concrete and reinforced concrete structures are often used in a variety of corrosive media. Corrosion of concrete and steel bars is very common. The corrosion damage of concrete structures has a negative impact on the durability of construction projects. Most of those skilled in the art use coating protection to reduce or avoid the occurrence of its corrosion phenomenon. By coating a certain material, a protective layer can be formed on the concrete surface to prevent water-soluble media from entering the interior of the concrete to improve the durability of the concrete. In the existing bridge maintenance process, the materials coated on the building surface mainly include fluorocarbon paint, polyurethane and cement-based, etc., which are not environmentally...

Claims

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Application Information

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IPC IPC(8): E01D22/00C09D1/00C09D163/00E01D101/24
CPCC09D1/00C09D163/00E01D22/00E01D2101/24
Inventor 叶学林
Owner HEFEI KALESITONG BUILDING MATERIAL CO LTD
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