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A crack-following coating system for reinforced concrete and its anti-corrosion application

A reinforced concrete and following technology, which is applied in the direction of coating, anti-corrosion coating, epoxy resin coating, etc., can solve the problems of lack of engineering practice and application, and achieve the effects of improving compatibility, excellent decorative effect, and improving elasticity

Active Publication Date: 2022-03-15
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the research on these toughened epoxy resins is seldom aimed at concrete protective coatings, and there is even less engineering practice in this field.

Method used

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  • A crack-following coating system for reinforced concrete and its anti-corrosion application
  • A crack-following coating system for reinforced concrete and its anti-corrosion application
  • A crack-following coating system for reinforced concrete and its anti-corrosion application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-3

[0081] The composition of the main agent and curing agent of the penetrating epoxy resin sealing primer of Example 1-3 of the present invention is shown in Table 1 and Table 2.

[0082] Table 1 Primer main agent formula composition

[0083]

[0084] The epoxy resin toughening agent in Table 1 is the polymer long-chain polyol compound YM-004.

[0085] Primer main agent preparation: put hydrogenated bisphenol A type epoxy resin, small molecular polyether type epoxy resin, silicone rubber modified epoxy resin, epoxy resin toughener and solvent into the dispersion stirring tank according to the raw material formula , Stir evenly and discharge.

[0086] Table 2 Primer curing agent formula composition

[0087]

[0088] The coupling agent in Table 2 is diethylaminomethyltriethoxysilane.

[0089] Preparation of primer curing agent: put polyetheramine curing agent D-230, 1-butyl-3-methylchloroimidazole, diethylaminomethyltriethoxysilane and isobutanol into the Disperse in the...

Embodiment 4-6

[0097] The composition of the solvent-free epoxy putty formulation main agent and curing agent in Examples 4-6 of the present invention is shown in Table 4 and Table 5.

[0098] Table 4 Putty main agent formula composition

[0099]

[0100] The epoxy resin putty filling glue, diluent and organic bentonite in Table 4 are the epoxy resin putty filling glue, dimethyl glycidyl ether of Germany WEICON Company and the product 881-B of Zhejiang Qinghong New Material Co., Ltd. respectively.

[0101] Preparation of putty main agent: Add epoxy resin putty filling glue into the container, add diluent, stir for 15 minutes, control the speed at 300r / min, then add titanium dioxide, light calcium hydrochloride, heavy calcium carbonate, organic bentonite, talc in sequence Powder, each kind needs to be stirred for 10 minutes after adding, and the speed is controlled at 1000r / min. After all are added, stir for another 25 minutes.

[0102] Table 5 putty curing agent formula composition

[0...

Embodiment 7-9

[0113] Table 7 shows the modified main agent of the modified high-ductility anti-corrosion intermediate paint formula in Examples 7-9 of the present invention.

[0114] Formulation composition of main agent of modified high ductility anticorrosion intermediate paint in Table 7

[0115]

[0116] The fumed silica, dispersant and defoamer in Table 7 are product A-200 from Degussa, Disperbyk103 from BYK and BYK-052 from BYK.

[0117] Preparation of polyether-modified epoxy resin in modified main agent of intermediate paint:

[0118] Step ①, under the protection of nitrogen, vacuum dehydrate 600g of polyether polyol (PPG) N-210 for 40min, slowly add 190g of toluene diisocyanate (TDI) dropwise, control the temperature at 80°C, and perform an addition reaction for 2h to obtain terminal Isocyanate prepolymers.

[0119] Step 2. After uniformly mixing the 240g terminal isocyanate prepolymer obtained above with 560g epoxy acrylic resin (3:7 mass ratio), add 0.8g of trimethylolpropan...

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Abstract

The invention relates to the technical field of construction, in particular to a reinforced concrete crack-following coating system and its anti-corrosion application, and more particularly to the coating protection application of marine engineering concrete structures. The coating is followed by penetrating epoxy resin sealing primer, solvent-free epoxy resin putty, polyether modified epoxy resin high toughness intermediate coating and elastic polyurethane topcoat. The anti-corrosion application of the crack-following coating on the surface of reinforced concrete of the present invention is completed through six processes. The crack-following coating of the reinforced concrete of the present invention not only has excellent mechanical properties such as good crack following, high tensile strength and prevention of matrix cracking, It also has excellent protective properties of alkali resistance, aging resistance and chloride ion penetration resistance. The construction process has the characteristics of short cycle and simple operation. It is an effective method that is conducive to on-site implementation and improves the life of concrete structures.

Description

technical field [0001] The invention relates to the technical field of construction, in particular to a reinforced concrete crack-following coating system and its anti-corrosion application, and more particularly to the coating protection application of marine engineering concrete structures. Background technique [0002] Concrete is an inorganic material composed of cement, sand and admixtures. It is hard and wear-resistant. It is currently the most widely used structural material in the world. With the rapid development of my country's marine engineering construction, reinforced concrete structures are widely used in various coastal buildings, such as docks, cross-sea bridges, submarine tunnels and other large buildings are mainly reinforced concrete structures. [0003] In the marine environment, the exposed concrete structure surface is corroded by seawater immersion, alternating wet and dry, sunlight exposure, coastal salt spray, marine organisms and humid air for a lon...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E04G23/02E04B1/64E04B1/66C09D163/00C09D163/10C09D175/08C09D175/06C09D5/00C09D5/34C09D5/08C09D7/61C09D7/20C08G18/42C08G18/62C08G18/58C08G18/64
CPCE04G23/02E04G23/0203E04B1/66C09D163/00C09D163/10C09D175/06C09D5/002C09D5/34C09D5/08C09D7/61C09D7/20C08G18/4081C08G18/42C08G18/6216C08G18/58C08G18/6415C08L2205/03C08L2205/025C08L2201/08C08L2312/00C08L2205/04C08L63/00C08L75/08C08K3/34C08K3/36C08K13/02C08K5/13
Inventor 马秀敏孙丛涛侯保荣
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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