Construction method for applying polyurea to old flexible waterproof roof for renovation transformation

A flexible waterproof and construction method technology, applied in building construction, building maintenance, construction, etc., can solve problems that have not yet been applied, and achieve good waterproof effect.

Active Publication Date: 2012-01-11
CHINA BUILDING MATERIAL TEST & CERTIFICATION GRP SUZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, polyurea has begun to be used in roof waterproofing projects, mainly in some important new

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0027] The method of the present invention will be further described in detail below by using polyurea to renovate the waterproof roof of the car body workshop and stamping parts warehouse of Shanghai General Motors North Plant as an example, but the present invention is not limited to this embodiment.

[0028] The body workshop and stamping parts warehouse of Shanghai General Motors North Plant were built in the 1990s. During this period, they were frequently repaired and water leakage occurred. This roofing project is facing the administrative office building, and the color of the repairs on it is also very ugly. The roof of the bodywork workshop of the North Plant (Phase I and the stamping parts warehouse) is made of EPDM and 603 rubber coil roofing, and the base surface is a soft roof with steel structure and rock wool. The north-south span of the factory building is about 183.5 meters, and the east-west width is about 128 meters. The north-south span of the No. 2 ware...

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Abstract

The invention relates to a construction method for applying polyurea to the old flexible waterproof roof for renovation transformation, which comprises the steps of: (1) base layer cleaning; (2) field maintenance; (3) primer brush application: adopting epoxy modified polyurethane type materials with the 100 percent solid content as primer to be directly coated and brushed on the base layer; (4) polyurea waterproof layer formation through polyurea spraying and coating on the primer surface, wherein the spraying and coating construction is completed by regions, the construction overlap edge is designed into 150 to 200mm, the secondary construction is carried out, the solvent cleaning is carried out before secondary polyurea spraying and coating at time intervals more than 6h, then, the primer is coated and brushed, the polyurea is then sprayed and coated, and the thickness of the polyurea waterproof layer is not lower than 1.5mm; and (5) facing formation through finish coat brush application within 6h after the polyurea spraying and coating: the finish coat adopts aliphatic polyurethane materials, and the facing thinness is not lower than 0.2mm. Roofs after renovation transformation by the construction method have the advantages that the waterproof effect is good, and in addition, the appearance is attractive.

Description

technical field [0001] The invention relates to a construction method for applying polyurea to the renovation of old flexible waterproof roofs. Background technique [0002] In the prior art, commonly used waterproof materials such as waterproof coiled material, polyurethane waterproof coating, acrylate waterproof material, silicone rubber waterproof material, organic and inorganic composite waterproof materials are ubiquitous or prone to aging and cracking, or have insufficient strength and low puncture resistance , Usually the curing speed is slow, the construction requirements are high, the adhesion is poor, and it contains volatile solvents and other problems. Spray polyurea elastomer (SPUA for short), as an emerging waterproof and wear-resistant material, has completely broken through the limitations of traditional environmental protection coating technology. Component A is prepared by reacting isocyanate with oligomer diol or triol; component B is composed of amino-te...

Claims

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Application Information

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IPC IPC(8): E04G23/03
Inventor 羡永彪杨胜朱志远宁尚勇李赉洲何树雄
Owner CHINA BUILDING MATERIAL TEST & CERTIFICATION GRP SUZHOU
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