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Method for coating waterproof dope on surface of high-speed rail concrete

A technology for concrete surface and waterproof coating, which is applied to the device for coating liquid on the surface, pretreatment surface, coating, etc. It can solve the problem of not really finding the basic equipment and construction method of the bridge deck, affecting the quality of the waterproof system, etc. Long service life, simple operation effect

Inactive Publication Date: 2012-07-11
SHANGHAI HUNENG ANTI CORROSION & HEAT INSULATION ENG
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially in the surface treatment of the bridge base surface in the current bridge waterproofing, almost all material manufacturers and owners have realized that the result of the base surface treatment directly affects the quality of the entire waterproof system, but they have not really found a suitable bridge deck base layer. Processing equipment and methods

Method used

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Examples

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Embodiment

[0020] A method for coating waterproof paint on the surface of high-speed iron concrete, the method comprising the following steps:

[0021] (1) To treat the surface of high-speed iron concrete, use 200-mesh quartz sand and primer in a ratio of 1:1 by weight to scrape the surface of the concrete in batches, and treat the roughness of the concrete surface to meet the requirements of SP3~SP5, and remove the surface of the concrete Surface laitance, loose particles or oil pollution and other pollutants, control the concrete surface flatness to 3mm / 4m or 2mm / 1m, the quality of the concrete bridge deck should meet the "Interim Standards for Construction Quality Acceptance of Passenger Dedicated Railway Bridge and Culvert Engineering" or design requirements, Control moisture content ≤ 6%. Then spray a layer of primer on the treated concrete surface, the primer used is epoxy resin, polyurethane or its modified products, the spraying amount is not less than 0.4kg per square meter of c...

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Abstract

The invention relates to a method for coating a waterproof dope on the surface of high-speed rail concrete. The method comprises the following steps of: treating the surface of the high-speed rail concrete; removing contaminants from the surface of the concrete; controlling the flatness and the roughness of the surface of the concrete to be SP3 to SP5; and spraying a primer, a polyurea waterproof dope and an aliphatic polyurethane finish onto the treated surface of the concrete. Compared with the prior art, the method is simple in operation; and the waterproof dope is sprayed onto the surface of the high-speed rail concrete, and the three layers of dopes can well protect the concrete and fulfill the aim of preventing water and corrosion, so the service life of the high-speed rail concrete is prolonged.

Description

technical field [0001] The invention relates to a paint coating method for concrete surfaces, in particular to a waterproof paint coating method for high-speed iron concrete surfaces. Background technique [0002] The erosion of rainwater and the corrosion effect of rainwater on bridges are manifested in the destruction of the alkaline environment in the concrete and the loss of calcium due to the penetration of rainwater, which will inevitably cause concrete dissolution, rusting of steel bars, and reduction of strength, which will eventually lead to a reduction in the service life of the bridge. [0003] Years of exploration and reference to foreign experience, no matter in the construction of road bridges or railway bridges, relevant technical standards and specifications related to the performance requirements of waterproof materials have been formulated; The common feature is that the bridge deck is required to be free of laitance and dust before the waterproof coating i...

Claims

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Application Information

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IPC IPC(8): B05D7/24B05D1/36B05D3/12
Inventor 张中良石文明
Owner SHANGHAI HUNENG ANTI CORROSION & HEAT INSULATION ENG