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Construction method of spray polyurea protection system for concrete base surface

A technology of concrete base and construction method, which is applied in basic structure engineering, protection devices, building maintenance, etc., can solve the problems of reducing the porosity of the membrane surface and failing to raise it.

Active Publication Date: 2018-07-27
JIANGSU SOBUTE NEW MATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent document 105272002A discloses a concrete surface repair putty and its application, and develops a putty material for concrete base surface repair, but only for defect repair of concrete base surface
None of the above technologies has been able to propose how to use putty materials to ensure the construction quality after polyurea spraying and reduce the porosity of the film surface after construction.

Method used

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  • Construction method of spray polyurea protection system for concrete base surface
  • Construction method of spray polyurea protection system for concrete base surface
  • Construction method of spray polyurea protection system for concrete base surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0080] (1) Preparation of one-component polyurethane putty: Add 100g of polyether polyol N330 into a container with a high-speed dispersing device, start stirring at 1200 rpm, vacuum degree -0.08MPa, and dehydrate at 120°C for 3 hours. The moisture content was 0.01% measured by Fischer method, and the vacuum was relieved by nitrogen or dry air, and the temperature was lowered to 68°C, and 103.2g of liquefied MDI was added. After a constant temperature reaction for 30 minutes, the temperature was raised to 85°C for a constant temperature reaction for 1 hour. By the toluene di-n-butylamine method, See GB / T 12009.4-1989, the measured final isocyanate content is 15%, add 11.25g of latent curing agent Hardener VPLS 2959 and continue stirring for 40min, add 609g of dried aggregate (200 mesh quartz sand 55%, 600 mesh talcum powder 44%, H18 fumed silica 1%), open the high-speed dispersing device, stir at 3000 rpm for 40min, cool down and discharge to obtain the one-component polyuretha...

Embodiment 2

[0088] (1) Preparation of one-component polyurethane putty: Add 100g of polyether polyol EP330N into a container with a high-speed dispersing device, start stirring at 500 rpm, vacuum degree -0.1MPa, and dehydrate at 120°C for 1.5h. The moisture content is 0.02% as measured by Karl Fischer method, the vacuum is relieved by nitrogen or dry air, the temperature is lowered to 68°C, 62.6g of PAPI is added, after constant temperature reaction for 40min, the temperature is raised to 75°C for constant temperature reaction for 2h, and the toluene di-n-butylamine method is used. See GB / T 12009.4-1989, the measured final isocyanate content is 10%, add 0.8g of latent curing agent PZ-005 and continue to stir for 20min, add 162.6g of dried aggregate (600 mesh quartz sand 60% , 1250 mesh talcum powder 39%, A200 fumed silica 1%), open the high-speed dispersion device, stir 40min at 2000 rpm, cool down and discharge to obtain the one-component polyurethane putty of the present invention.

[0...

Embodiment 3

[0096] (1) Preparation of one-component polyurethane putty: Add 100g of polyether polyol EP330N into a container with a high-speed dispersing device, start stirring at 1000 rpm, dehydrate at a vacuum of -0.09MPa and 115°C for 2 hours, and then The moisture content measured by Fischer method is 0.03%, and the vacuum is relieved by nitrogen or dry air, the temperature is lowered to 70°C, and 72.6gH 12 MDI and 0.05g of dibutyltin dilaurate, after constant temperature reaction for 35min, heat up to 80°C for constant temperature reaction for 3h, use toluene di-n-butylamine method, see GB / T12009.4-1989, the final isocyanate content is 11.9% , add 5.2g of latent curing agent PZ-005 and continue to stir for 30min, add 345g of aggregate after drying (50% of 400 mesh quartz sand, 48% of 800 mesh talc powder, 2% of A200 fumed silica), and turn on the high speed Dispersion device, stirring at 2500 rpm for 60 minutes, cooling and discharging to obtain the one-component polyurethane putty o...

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Abstract

The invention provides a construction method of a spray polyurea protection system for a concrete base surface. The construction method comprises the steps that a first primer layer, a first repair putty layer, a first polyurea spray layer, a second repair putty layer and a second polyurea spray layer coat the concrete base surface in sequence, wherein the first repair putty layer is formed by curing single-component polyurethane putty, and the single-component polyurethane putty is obtained by adding a latent curing agent for stirring and mixing when the content of isocyanate is up to 10%-15%by the reaction of polyols, isocyanate and a catalyst; and the surface defects of the first polyurea spray layer are repaired by the second repair putty layer, the second repair putty layer is formedby curing two-component polyurethane putty, the two-component polyurethane putty is composed of a component A and a component B, the component A is the single-component polyurethane putty, and the component B comprises 90.5-97.8 parts of polyaspartic acid ester.

Description

technical field [0001] The invention relates to a construction method of a spray-coated polyurea protection system used on the surface of a concrete base. Background technique [0002] Concrete buildings are widely used in roads and bridges, water conservancy and hydropower, municipal engineering and underground structures. During natural exposure and use, the erosion of corrosive media will cause carbonization of concrete components, corrosion of internal steel bars, freeze-thaw damage or weathering erosion, and eventually Affect structural quality and aesthetics. As one of the important methods to protect the concrete of buildings, the external protection technology of concrete is a necessary means to make up for the congenital deficiency of concrete and prolong its life. However, during the mixing, transportation, pouring, and maintenance of concrete buildings, due to factors such as improper vibration or improper construction, the surface forms defects such as honeycomb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04F13/02E04G23/02E02D31/02C09D5/34
CPCC09D5/34E02D31/02E04F13/02E04G23/02
Inventor 刘玉亭孙德文冉千平万赟周晓李波刘娜
Owner JIANGSU SOBUTE NEW MATERIALS
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