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Method for preventing indoor swimming pool with concrete structure from being eroded by chlorine gas

A concrete structure and chlorine gas corrosion technology, which is applied to building components, building insulation materials, etc., can solve the problems of steel bar corrosion, concrete protective layer cracking, etc., and achieve the effect of prolonging service life, significant comprehensive effect, and eliminating high alkali content

Active Publication Date: 2010-01-06
林州建总建筑工程有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the use, it was found that many steel bars were corroded in this project, and the concrete protective layer of some steel bars was broken

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: A method for preventing chlorine gas corrosion in a concrete structure indoor swimming pool, specifically: the steel bars in the concrete structure columns and the roof adopt non-prestressed steel bars, and the non-prestressed steel bars are pre-galvanized, and the thickness of the galvanized layer is not less than 250μm; the reinforcement in the roof concrete structure adopts prestressed reinforcement, and the prestressed reinforcement adopts unbonded prestressed steel strand;

[0027] The weight ratio of cement, sand, stones and water in concrete is 1:2.3:5.8:0.8, the water reducer is TH-928 polycarboxylate water reducer, the amount is 1.0% of the cement amount; the antifreeze agent is HZ-6 Antifreeze agent, the amount of antifreeze agent is 2-3% of the cement amount at positive temperature, and the amount is slightly increased at negative temperature (for example, at -5°C, it can be mixed with 3-4%, and at -10°C, it can be mixed with 4-5%); The dosage o...

Embodiment 2

[0038] Embodiment two: the difference with embodiment one is:

[0039] The weight ratio of cement, sand, stone, and water in concrete is 1:2:5:0.5, the cement is 42.5 Portland cement, and the amount of TH-928 polycarboxylate water reducer is 0.4% of the cement; the antifreeze is HZ- 6 Antifreeze, the dosage is 2.5% of the cement dosage, and the dosage of Dura fiber is 0.8kg / m 3 concrete.

[0040] Other requirements are the same as those in Embodiment 1 and will not be repeated.

Embodiment 3

[0041] Embodiment three: the difference with embodiment one is:

[0042] The weight ratio of cement, sand, stones and water in concrete is 1:4:7:1, the water reducer is TH-928 polycarboxylate water reducer, the amount is 1.1% of the cement amount; the antifreeze is FDN-6 Antifreeze, the dosage is 3.5% of the cement dosage, and the dosage of Dura fiber is 1.5kg / m 3 concrete.

[0043] Other requirements are the same as those in Embodiment 1 and will not be repeated.

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Abstract

The invention relates to a method for preventing an indoor swimming pool with a concrete structure from being eroded by chlorine gas. The invention has the technical scheme that non-prestressed steel bars which are processed by an advanced hot galvanizing method are adopted in posts and a roof with concrete structures; when prestressed steel bars are adopted in the concrete structure of the roof, the prestressed steel bars adopt non-adhesive prestressed steel stranded wires; the concrete contains polypropylene fiber, the consumption of which is 0.5-2.5 kg/m<3> concrete; and the weight ratio of chlorine ions to cement in the concrete of unit volume is smaller than or equal to 0.1%. In the method of the invention, the strength grade of the concrete can reach more than C40 grade, the swimming pool with the concrete structure can be safely used within the normal concentration range of chlorine ions, and the erosion caused by environmental factors is reduced. The adoption of the polypropylene fiber can obviously improve the durability of the concrete structure, thus compared with the common concrete, the anti-leakage capacity of the concrete containing the polypropylene fiber is improved by more than 70%, and the service life of the swimming pool is prolonged and can be prolonged by more than 60%. Therefore, the invention has better application value and popularization value.

Description

1. Technical field: [0001] The invention relates to a method for preventing corrosion of concrete, in particular to a method for preventing corrosion of chlorine gas in an indoor swimming pool with a concrete structure. 2. Background technology: [0002] It is a common and economical practice to use a concrete structure roof for an indoor swimming pool. Because swimming pools are public places, they need to be disinfected frequently, and chlorine-containing disinfectants are often used for disinfection. At present, the chlorine-containing disinfectants used in swimming pools in my country include: liquid chlorine, bleaching powder, bleaching water, strong chlorine (TCCA) and so on. When disinfecting a swimming pool, the chloride contained in the disinfectant in the pool water will volatilize as the water vapor rises, and the air often contains a higher concentration of chloride ions, and the presence of chloride ions will cause corrosion of the steel bars in the concrete. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04B1/64C04B28/00
Inventor 李根红杜巍冯敬涛胡保刚职晓云李怀增秦文昌冯俊昌万福生刘蒲
Owner 林州建总建筑工程有限公司
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