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Anti-shellfish coating for concrete surface protection of water-conveying tunnel

A technology for concrete surfaces and water tunnels, applied in coatings, anti-corrosion coatings, epoxy resin coatings, etc., can solve problems such as unsuitable repair and protection of freshwater shellfish, improve operating efficiency and concrete life, and reduce shellfish erosion , improve the effect of anti-carbonization

Active Publication Date: 2017-08-22
BEIJING IWHR KHL +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is not suitable for the repair and protection of concrete in built projects and the prevention and control of freshwater shellfish

Method used

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  • Anti-shellfish coating for concrete surface protection of water-conveying tunnel
  • Anti-shellfish coating for concrete surface protection of water-conveying tunnel
  • Anti-shellfish coating for concrete surface protection of water-conveying tunnel

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preparation example Construction

[0023] The preparation method of the first component is as follows: under the condition of 40° C. and stirring speed of 400-1200 rpm, mix epoxy resin, toughening modifier and active diluent in a reaction kettle for 30 minutes. Then, the heating is stopped, and the thixotropic agent and the nano-mixed filler are added into the reaction kettle, and the stirring is continued until all the materials are mixed evenly. Grinding the mixture with a grinder to a fineness of ≤50 μm is the first component.

[0024] The second component includes benzyl alcohol diluent, nano-mixed filler, and at least one of polyamide curing agent, phenalkamine curing agent, and modified fatty amine curing agent. In terms of mass percentage, the contents of benzyl alcohol diluent, nano-mixed filler, polyamide curing agent (600#, V140), phenalkamine curing agent and modified fatty amine amine curing agent are 5-10 parts and 100-160 parts respectively , 30-80 copies, 20-70 copies, 20-80 copies. Wherein, th...

Embodiment 1

[0032] Table 1 and table 2 are respectively the formulas of the concrete surface protection of the water delivery tunnel and the anti-shellfish coating provided by the present invention, wherein, the preparation method of the protective coating is:

[0033] 1. The preparation method of the first component: Add E51 epoxy resin, epoxy-terminated liquid NBR as a toughening agent, and butyl glycidyl ether as a diluent into the reaction kettle according to the following ratio, and stir and mix evenly. Then add modified nano-calcium carbonate, fumed silicon dioxide, polytetrafluoroethylene micropowder, and silicon powder according to the following proportions, and mix well. Then, the mixture is ground to a fineness of less than 20 μm by using a three-roll mill, and loaded into barrels to obtain the first component.

[0034] 2. The preparation method of the second component: add polyamide curing agent (600#), modified fatty amine curing agent (593), benzyl alcohol diluent, nano-titan...

Embodiment 2

[0042]Table 3 and table 4 are respectively the formulation and performance characteristics of the concrete surface protection of the water delivery tunnel and the anti-shellfish coating provided by the present invention, wherein, the preparation method of the protective coating is:

[0043] 1. The preparation method of the first component: Add epoxy resin, epoxy-terminated liquid NBR as a toughening agent, and diluent butanediol diglycidyl ether into the reaction kettle according to the following ratio, and stir and mix evenly. Then add modified nano-calcium carbonate, fumed silicon dioxide, polytetrafluoroethylene micropowder, and silicon powder according to the following proportions, and mix well. Then, the mixture is ground to a fineness of less than 20 μm by using a three-roll mill, and loaded into barrels to obtain the first component.

[0044] 2. The preparation method of the second component: Add polyamide curing agent (600#) and phenalkamine curing agent (T31), benzyl ...

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Abstract

The invention relates to an anti-shellfish coating for concrete surface protection of a water-conveying tunnel. The coating comprises a first component and a second component in a weight ratio of 10: 3 to 10: 5, wherein the first component comprises epoxy resin, a toughening modifier, a diluent, a thixotropic agent and a nanometer mixed filling material, and the second component comprises a benzyl alcohol diluent, the nanometer mixed filling material and at least one selected from a group consisting of a polyamide curing agent, a phenolic aldehyde amine curing agent and a modified aliphatic amine curing agent. The coating provided by the invention has the beneficial effects of improvement of the anti-carbonization, impervious performance and scouring and abrasion resistance of concrete used for the water-conveying tunnel, reduction in the roughness coefficient of a river and in shellfish erosion, prolongation of a repair cycle, enhancement of operation benefits and concrete life and substantial increase in economic benefits.

Description

technical field [0001] The invention relates to the technical field of water conservancy and hydropower engineering protection, in particular to a concrete surface protection and shellfish-proof coating of a water delivery tunnel. Background technique [0002] Concrete linings of water delivery tunnels of hydropower stations are threatened by various erosions and diseases. The common diseases mainly include cracks, frost heave, abrasion, cavitation erosion, alkali-aggregate reaction, carbonization, dissolution and erosion. The first three categories belong to physical diseases, and the latter four belong to chemical diseases. In addition, water delivery tunnels are extremely vulnerable to the invasion of shellfish such as marsh clams (freshwater shellfish). These shellfish are densely attached to the concrete surface of the tunnel, secrete acidic liquid, cause biological corrosion to concrete and reduce water delivery efficiency. Due to the differences in engineering factor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D115/00C09D127/18C09D5/08C09D7/12
CPCC08K2003/2241C08K2003/265C08K2201/011C08K2201/014C08L2205/02C08L2205/03C08L2205/035C09D5/08C09D7/61C09D7/62C09D7/65C09D163/00C08L15/00C08L27/18C08K13/06C08K9/00C08K3/26C08K3/36C08K3/22C08L63/00
Inventor 李敬玮赵波陈改新夏世法孟川孙志恒瞿杨贾保治
Owner BEIJING IWHR KHL
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