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A kind of anti-salt freezing and anti-corrosion coating for concrete components

A technology for anti-salt freezing and concrete, which is applied in the direction of anti-corrosion coatings, coatings, etc., can solve the problems of large amount of addition, high cost, and low feasibility, so as to improve the ability of anti-salt freezing, anti-rust function of steel bars and anti-salt Freezing ability, excellent effect of hydrophobic and impermeable performance

Active Publication Date: 2017-08-15
TSINGHUA UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this needs to be added when the concrete is prepared, and the amount of addition is large, and the cost is increased. The feasibility of using it for auxiliary facilities such as concrete guardrails and retaining walls is very small

Method used

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  • A kind of anti-salt freezing and anti-corrosion coating for concrete components
  • A kind of anti-salt freezing and anti-corrosion coating for concrete components
  • A kind of anti-salt freezing and anti-corrosion coating for concrete components

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Mix 10 parts of liquid disilane, 4 parts of isobutyl silane, 1 part of diethylene triamine, 1 part of triethanolamine, 0.3 parts of fatty alcohol polyoxyethylene ether AEO-5, and 0.6 parts of boric acid. Stir slowly for 5 minutes and add 100 Dilute with a portion of n-butanol solvent to obtain anti-salt and anti-rust paint.

[0022] This kind of coating was applied to the surface of C30 concrete to form a hydrophobic film, and the salt-freezing resistance of concrete specimens was determined by the concrete single-sided freeze-thaw method specified in the Standard for Test Methods for Long-term Performance and Durability of Ordinary Concrete (GB50082-2008) ability. Such as Figure 1-Figure 2 As shown, if the paint is not applied, after 4 freeze-thaw cycles, the amount of peeling off the surface of the concrete specimen reaches 2856g / m 2 , Much higher than the limit specified by the standard. After 36 freeze-thaw cycles of concrete specimens painted with paint, the surface...

Embodiment 2

[0024] Mix 25 parts of liquid monosilane, 8 parts of isooctylsilane, 2 parts of ethylene diamine tetraacetic acid, 2 parts of triethanolamine, 0.6 parts of fatty acid methyl ester polyoxyethylene ether FMEE, and 2 parts of boric acid. Stir slowly for 5 minutes and add 100 Dilute with a portion of propylene benzene solvent to obtain anti-salt and anti-rust paint.

[0025] This kind of coating was applied to the surface of C50 concrete to form a hydrophobic film, and the salt-freezing resistance of concrete specimens was determined by the concrete single-sided freeze-thaw method specified in the Standard for Test Methods for Long-term Performance and Durability of Ordinary Concrete (GB50082-2008) ability. If no paint is applied, after 8 freeze-thaw cycles, the amount of peeling on the surface of the concrete specimen reaches 2750g / m 2 , Much higher than the limit specified by the standard. After 48 freeze-thaw cycles of concrete specimens painted with paint, the surface peeling am...

Embodiment 3

[0027] Mix 15 parts of liquid trisilane, 4 parts of isooctylsilane, 1 part of triethylenetetramine, 1 part of triethanolamine, 0.2 part of nonylphenol polyoxyethylene ether TX-7, 0.3 part of boric acid, and stir slowly for 5 minutes, then add 100 parts of cyclohexanone solvent are diluted to obtain anti-salt and anti-rust paint.

[0028] This kind of paint was painted on the surface of C30 concrete with a different mix ratio from Example 1 to form a hydrophobic film. According to the "Standard for Long-term Performance and Durability Test Methods of Ordinary Concrete" (GB50082-2008), the concrete single-sided freeze-thaw Method to determine the salt-freezing resistance of concrete specimens. If the paint is not applied, after 4 freeze-thaw cycles, the amount of peeling on the surface of the concrete specimen reaches 2681g / m 2 , Much higher than the limit specified by the standard. After 36 freeze-thaw cycles of concrete specimens painted with paint, the amount of peeling on the ...

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Abstract

The invention belongs to the technical field of concrete member protective materials and particularly relates to a salt-frost-resistant and rust-resistant coating for a concrete member. According to the coating, by weight, 10-25 parts of liquid silane, 4-8 parts of triisobutylsilane, or octyl silane or isooctyl silane, 1-2 parts of a chelating agent, 1-2 parts of triethanolamine, 0.2-0.6 parts of polyoxyethylene ethers nonionic surfactant and 0.3-2 parts of boric acid are mixed to be uniform and prepared into a coating stock solution; the coating stock solution and solvent are diluted according to the weight ratio of 1: (1-10) and then used. The salt-frost-resistant and rust-resistant coating for the concrete member has a permeation function, is excellent in hydrophobic permeability performance and has a reinforcing steel bar rust resistance function and capacity of improving salt frost resistance of the concrete member.

Description

Technical field [0001] The invention belongs to the technical field of concrete component protective materials, and in particular relates to a concrete component anti-salt and anti-rust paint. Background technique [0002] The bridge guardrail of the highway, the sidewalk in the tunnel, and the slope retaining wall are all concrete components. After it snows in the northern winter, in order to open up traffic as soon as possible, it is usually necessary to sprinkle deicing salt on the road surface. Melted salty snow water splashes on the concrete components on both sides of the highway. If these components have poor salt and freeze resistance, they will quickly be damaged. After the concrete components are eroded by the surface of the deicing salt, the chloride contained in the deicing salt invades the interior of the concrete, resulting in accelerated corrosion of the internal steel bars. In the current highway structure design, the requirements for the strength level of concr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D183/04C09D5/08C09D7/12
CPCC08K2201/014C09D5/08C09D7/61C09D7/63C09D7/65C09D183/04C08L71/02C08K5/17C08K2003/387
Inventor 阎培渝董树国张飞翔张国杰胡瑾
Owner TSINGHUA UNIV
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