Concrete surface protection treatment method based on plasma hot-spraying technology

A concrete surface and treatment method technology, which is applied in the direction of fusion spraying, metal material coating process, coating, etc., can solve the problems of poor weather resistance, insufficient service life of organic coating materials, and difficulty in infiltrating crystalline materials. Appropriate degree of chemicalization, overcoming insufficient service life, good hardness and economical effect

Active Publication Date: 2020-08-25
CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to overcome the defects in the above-mentioned prior art, and to provide a concrete surface protection treatment method based on plasma thermal spraying technology. Avoid the disadvantages of poor weather resistance of organic materials and difficulty in infiltrating crystalline materials. The inorganic non-metallic protective layer formed on the concrete surface does not have the risk of performance aging, brittle fracture and chemical bond destruction, and can overcome the problem of insufficient service life of organic coating materials. Applicable Protection of concrete surfaces in water conservancy projects

Method used

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  • Concrete surface protection treatment method based on plasma hot-spraying technology
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  • Concrete surface protection treatment method based on plasma hot-spraying technology

Examples

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Effect test

Embodiment 1

[0043] Example 1 is aimed at the protection of the exterior wall of a hydropower station at an altitude of 3200m in the Tibet area. It is constructed in winter with a temperature of 5°C and no wind. The concrete strength grade of the exterior wall of the power station building is C35, and the surface is dry and water-free. Adopted the method among the present invention to carry out protective treatment to concrete exterior wall, its treatment process is as follows:

[0044] (1) Use high-pressure air with a temperature of 100°C and a pressure of 0.2 MPa to dry the surface of the concrete exterior wall, control the moving speed of the air nozzle to 0.1m / s, and the distance between the air nozzle and the surface of the concrete exterior wall to 0.15m, until the concrete surface is completely dry;

[0045] (2) After drying, use high-pressure air at room temperature and pressure of 0.35MPa to wrap quartz sand with a particle size of 1.0mm to roughen the surface of the concrete ext...

Embodiment 2

[0049] Embodiment 2 is aimed at a certain high-performance concrete slab prefabricated component. The size of the concrete prefabricated component is 600mm×600mm×63mm, the concrete strength grade is C60, and the construction environment is indoor spraying. The specific treatment process is as follows:

[0050] (1) Use high-pressure air with a temperature of 80°C and a pressure of 0.25 MPa to dry the surface of the concrete prefabricated part, control the moving speed of the air nozzle to 0.3m / s, and the distance between the air nozzle and the surface of the concrete prefabricated part is 0.08m, until the concrete surface is completely dry;

[0051] (2) After drying, the surface of the concrete prefabricated part is roughened by using high-pressure air with a normal temperature and a pressure of 0.4 MPa to carry quartz sand with a particle size of 0.5 mm, and the distance between the quartz sand nozzle and the surface of the concrete prefabricated part is kept at 0.6m, control ...

Embodiment 3

[0057] Example 3 is aimed at the protection of the concrete face of a rockfill dam of a water conservancy project at an altitude of 1300m in Xinjiang. It is constructed in summer with a temperature of 35°C and a breeze. The concrete strength grade of the panel is C30, and the surface is dry and anhydrous. The specific process is as follows:

[0058] (1) Use high-pressure air with a temperature of 100°C and a pressure of 0.3MPa to dry the surface of the concrete panel, control the moving speed of the air nozzle to 0.2m / s, and the distance between the air nozzle and the concrete surface to be 0.12m until the concrete surface completely dry;

[0059] (2) After drying, use high-pressure air at room temperature and a pressure of 0.3MPa to carry quartz sand with a particle size of 0.8mm to roughen the surface of the concrete panel, and keep the distance between the quartz sand nozzle and the concrete surface at 0.5m. Control the moving speed of the quartz sand nozzle to 0.15m / s, r...

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Abstract

The invention provides a concrete surface protection treatment method based on a plasma hot-spraying technology. According to the treatment method, firstly, high-pressure air at the temperature of 80DEG C to 100 DEG C is utilized to dry the surface of concrete; next, the high-pressure air is utilized to wrap and carry particles to roughen the surface of the concrete; then, high-pressure air at the temperature of 100 DEG C to 150 DEG C is utilized to flush and preheat the surface of the concrete; and finally, by the aid of plasma hot-spray equipment, a powdery inorganic non-metallic raw material with the particle size of 20 microns to 120 microns is used for hot-spraying an inorganic material protection layer on the surface of the concrete by adjusting the powder feeding rate, plasma power, the airflow rate, the moving velocity, the spraying distance and other parameters. Through the treatment method, the anti-freezing and anti-permeating abilities of the concrete are improved, the defects of poor weather fastness and short service life in traditional organic material protection coating brushing are overcome, and the method can be widely applied to surface protection on concrete prefabricated parts and cast-in-place concrete structures.

Description

technical field [0001] The invention belongs to the field of water conservancy engineering, and specifically relates to a concrete surface protection treatment method based on plasma thermal spraying technology. The method adopts plasma thermal spraying inorganic non-metallic materials on the concrete surface to improve the durability of concrete, and enhance the concrete's resistance to ion erosion and corrosion resistance. The ability of the environment to penetrate water. Background technique [0002] Concrete is a heterogeneous multiphase composite material composed of various materials. During service, it is vulnerable to the penetration of environmental water and the erosion of harmful ions, resulting in deterioration of performance and structure, affecting the safe operation and durability of the structure. Therefore, the durability of concrete materials has long been the focus and difficulty of research in this field, and the key to this problem lies in the improveme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/11C23C4/134C23C4/02C04B41/68C04B41/65
CPCC23C4/11C23C4/134C23C4/02C04B41/68C04B41/65C04B41/5037C04B41/5035C04B41/5031C04B41/4527C04B41/5024
Inventor 石妍李杨李家正韩炜邓龙辉李响陈霞吕兴栋曹亚李明霞
Owner CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION
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