CN108250944A - Concrete protective coating system and construction method - Google Patents
Concrete protective coating system and construction method Download PDFInfo
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- CN108250944A CN108250944A CN201711466151.6A CN201711466151A CN108250944A CN 108250944 A CN108250944 A CN 108250944A CN 201711466151 A CN201711466151 A CN 201711466151A CN 108250944 A CN108250944 A CN 108250944A
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- priming paint
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D177/00—Coating compositions based on polyamides obtained by reactions forming a carboxylic amide link in the main chain; Coating compositions based on derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/002—Priming paints
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F13/00—Coverings or linings, e.g. for walls or ceilings
- E04F13/02—Coverings or linings, e.g. for walls or ceilings of plastic materials hardening after applying, e.g. plaster
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3045—Sulfates
Abstract
The invention discloses a kind of concrete protective coating systems, and weather-proof finishing coat is starched including concrete osmosis type priming paint and thickness, wherein, the osmosis type priming paint includes A1Component and B1Component, A1Component and B1Constituent mass ratio is 3:1~1:1；The thick weather-proof finishing coat of slurry includes A2Component and B2Component, A2Component and B2Constituent mass ratio is 1:3~3:1.The present invention also provides a kind of construction methods.Osmosis type priming paint can improve foundation base intension in concrete protective coating system of the present invention, pre- crack resistence, thickness starches weather-proof finishing coat high solid content and low viscosity, environmental protection, quick solidifying, period are short, with higher tensile strength and elongation, crack tracing ability is excellent, has excellent alkali resistance, resistance to ag(e)ing, resistance of chloride ion penetration, is conducive to extend the service life of concrete structure.
Description
Technical field
The present invention relates to technical field of buildings, more particularly to a kind of concrete protective coating system and construction method.
Background technology
Reinforced concrete buildings corrosion-resistant Basic Ways are by optimization design and construction, are improved to the maximum extent mixed
The solidifying soil resistance of chloride ion penetration of itself is to limit environment etching medium (chloride, oxygen and water etc.) infiltration concrete, so as to pre-
Anti- reinforcement corrosion.Mainly include：Properly increase concrete strength and cement consumption, using high performance concrete, ensure that reinforcing bar is protected
Covering thickness, the compactness for improving concrete, interior mixes reinforcing steel bar corrosion inhibitor, appearance at the width for avoiding cracking or stringent control critical eigenvalue
Coating protection applies (plating) layer reinforcing bar, cathodic protection etc..
Concrete surface protective coating is the safeguard procedures that antiseptic concrete is most effective, most economical.In armored concrete knot
Structure surface applies protective coating, can prevent the infiltration of hazardous medium, keep the basicity of concrete, be widely used in all kinds of reinforcing bars and mix
The protection of Xtah Crude Clay structure can improve the durability of reinforced concrete structure under certain condition.But to having there is microcrack
Concrete component function and effect are little, it is impossible to meet long-term life requirement, particularly ocean engineering concrete structure.Crack
It is that concrete material is inevitable, this is the defects of cement-based material is congenital.Therefore, concrete surface protective coating material
Crack resistance, crack, which follow performance, becomes the important indicator for examining concrete protective coating material.
The concrete protective coating material that the prior art is typically used for has：Epoxy coating, chlorinated rubber coating, propylene
Sour coating, polyurethane coating, epoxide coal bituminous coating, coal tar asphalt coating etc..These material generally existings protection short life,
The shortcomings of maintenance cost is high, the feature of environmental protection is poor.Particularly when crack occurs in concrete base layer, the protective coating on surface can be therewith
Cracking, loses protective action.
Chinese patent CN101456756A discloses " concrete structure heavy-duty nano composite coating and means of defence ", should
Nanometer modified epoxy sealing paint that method includes, nanometer modified epoxy cloud iron intermediate coat, nano modification fluorochemical urethane finishing coat
Or the third finishing coat of silicon or fluorinated polysiloxane finishing coat, adhesive force, the anti-corrosion life of protection system are improved, still, about flexibility
It is not described in, protection system is corresponding to be the mating thickness and construction method of traditional anticorrosive paint, and is applied according to each layer
Expect chemical composition and the description of other performances, can determine whether that its flexible promotion is very limited.
China's application of Publication No. CN107337993A, discloses that " a kind of high durability concrete of rapid construction is prevented
Watch box system and preparation method thereof ", the protection system improve construction efficiency, improve environmental suitability, still, as main anti-
The enhancement layer tensile strength and elongation of sheath are still than relatively low, 4.2~4.6MPa of tensile strength, elongation 11~22%, face
Layer 12.5~13.8MPa of tensile strength, elongation 98~110%, once therefore base is cracked, protective coating is with base one
The risk for playing cracking is still higher.
When therefore, for concrete earth building structure surface protective coating, need a kind of there is excellent anti-cracking performance, resistance to
Long property, resistance of chloride ion penetration and higher tensile strength and the concrete protective coating system of elongation.
Invention content
Based on drawbacks described above, the purpose of the present invention is to provide a kind of concrete protective coating system, the protection system packets
Foundation base intension, pre- crack resistence can be improved by including permeable primer of the present invention and the thick weather-proof finishing coat of slurry, osmosis type priming paint；
Thickness starches weather-proof finishing coat high solid content and low viscosity, and environmental protection, quick solidifying, period are short, has higher tensile strength and elongation, crack chases after
It is casual excellent, there is excellent alkali resistance, resistance to ag(e)ing, resistance of chloride ion penetration, be conducive to extend the use of concrete structure
Service life.
Another object of the present invention is to provide a kind of construction method, this method uses above-mentioned concrete protective coating system
It constructs.
Above-mentioned purpose is achieved through the following technical solutions：
According to an aspect of the present invention, concrete protective coating system provided by the invention, which is characterized in that including coagulation
Native osmosis type priming paint and the thick weather-proof finishing coat of slurry,
The osmosis type priming paint includes A1Component and B1Component, A1Component and B1Constituent mass ratio is 3:1~1:1, wherein,
A1Component, in percentage by weight, comprising：Low viscosity epoxy resin 10%~30%, isocyanate component
60%~85%, reactive diluent 0%~10%；
B1Component, in percentage by weight, comprising：Polyaspartic ester resin 40%~85%, polyamine 14%
~59%, accelerating agent 0%~10%, levelling agent 0.2%~0.5%, antifoaming agent 0.2%~0.5%；
The thick weather-proof finishing coat of slurry includes A2Component and B2Component, A2Component and B2Constituent mass ratio is 1:3~3:1,
In,
A2Component, in percentage by weight, comprising：Aliphatic poly isocyanate 0%~20%, elastic isocyanates
Performed polymer 80%~100%；
B2Component, in percentage by weight, comprising：Polyaspartic ester resin 30%~50%, toughening modifying gathers
Aspartate resin 25%~45%, dispersant 0.3%~0.5%, levelling agent 0.2%~0.5%, antifoaming agent 0.2%
~0.5%, color stuffing 5%~15%, complex function powder 2%~10%, the complex function powder is nanometer titanium dioxide-coated
Inorganic particle.
In the preferred embodiment of the invention, in the osmosis type priming paint,
The A1Component and the B1Constituent mass ratio is 3:1~1:1, further, A1Component and B1NCO in component
Equivalent and NH equivalents proportioning are 1:1.
The low viscosity epoxy resin is bisphenol-A class, bisphenol F type epoxy resins, hydrogenated epoxy resin, PU modified epoxy trees
Fat, nucleocapsid are epoxy resin toughened, the mixture of one or more of the dimer acid modified epoxy resin of high resiliency.
The isocyanate component is the modifier of diisocyanate and polyether polyol or diisocyanate and polyethers
The dimer or diisocyanate of polyalcohol and the tripolymer of polyether polyol.
The reactive diluent can be allyl glycidyl ether, benzyl glycidyl ether, butyl glycidyl ether, ten
Dialkyl group glycidol ether, tetrahydrophthalic acid 2-glycidyl ester, o-phthalic acid diglycidyl ester, 4,5- epoxide rings
Hexane -1,2- dicarboxylic acid diglycidyl ester, polypropylene glycol diglycidyl ether, polyethyleneglycol diglycidylether, new penta 2
The mixture of one or more of alcohol diglycidyl ether etc..
The polyaspartic ester resin can be reacted by dicarboxylic esters with primary amine compound preparing or
Using commercially available other polyaspartic ester resins.
The polyamine is the low molecular weight amine compound containing two or more molecule of primary amine, it is preferable that Ke Yiwei
One or both of diethylenetriamine, triethylene tetramine, isophorone diamine etc..
The accelerating agent is nonyl phenol, one or more in dibutyl tin laurate, stannous octoate, isooctyl acid bismuth.
The levelling agent is at least one of organosilicon levelling agent and polyacrylate flow agent.
The antifoaming agent is at least one of organic silicon defoamer and mineral oil antifoam agent.
In the present invention, the concrete osmosis type priming paint is prepared via a method which：
Low viscosity epoxy resin, isocyanate component and reactive diluent are uniformly mixed according to the above ratio, obtain A1Component
It is spare；
Polyaspartic ester resin, polyamine, accelerating agent, levelling agent and antifoaming agent are uniformly dispersed according to the above ratio,
B is made1Component is spare.
In use, by the A obtained1Component B1Component presses 1:1~1:3 ratio mixing, carries out the concrete infiltration
Priming paint construction usage.
In the preferred embodiment of the invention, in the thick weather-proof finishing coat of slurry, A2Component and B2NCO equivalents and NH in component
Equivalent proportioning is 1:1.
List of the aliphatic polymeric isocyanate for dicyclohexyl methyl hydride diisocyanate, hexamethylene-diisocyanate etc.
Body or its dimer or its tripolymer；The elasticity Isocyanate prepolymers body is Polyether Polyisocyanate Prepolymer or polyester-type
Isocyanate prepolymers body.
The complex function powder is the inorganic particle of nanometer titanium dioxide-coated, and the inorganic particle is calcium carbonate, sulfuric acid
At least one of barium, wollastonite in powder, silicon powder, diatomite, kaolin, mica powder, talcum powder etc..
The levelling agent is at least one of organosilicon levelling agent and polyacrylate flow agent.
The antifoaming agent is at least one of organic silicon defoamer and mineral oil antifoam agent.
The thick weather-proof finishing coat of slurry of the present invention is prepared via a method which：
Aliphatic polymeric isocyanate and elastic Isocyanate prepolymers body are uniformly mixed according to the above ratio, obtain A2Component is standby
With；
First resin and auxiliary agent (dispersant, levelling agent and antifoaming agent) are uniformly dispersed, then according to the above ratio according to the above ratio
Color stuffing and complex function powder, high speed dispersion or grinding are added in, B is made2Component is spare.
In use, by the A obtained2Component B2Component presses 1:3~3:It is weather-proof anti-to carry out the thick slurry for 1 ratio mixing
Rotten finishing coat carries out construction usage.
According to another aspect of the present invention, construction method provided by the invention, this method use coagulation of the present invention
Native osmosis type priming paint is constructed, and is included the following steps：
Base treatment：Polishing ground handles crack shrinkage joint, and oil removing removes laitance, until base is smooth, clean, dry；
Osmosis type priming paint is constructed：After foundation base intension, moisture content reach requirement, osmosis type priming paint construction is carried out, brushes 1~2
It is secondary, crossed construction, 100~200 μm of overall thickness；
Thickness starches weather-proof finishing coat construction：After 2h is completed in the coating of osmosis type priming paint, the weather-proof finishing coat construction of thick slurry is carried out, brushes 1~2
It is secondary, 500~1000 μm of overall thickness.
Advantageous effect：
Concrete protective coating system of the present invention is in concrete protection in application, its protective materials high solid content and low viscosity；
It does not need to add diluent during construction, it is environmentally friendly, be conducive to the health of construction personnel；One-pass film-forming, construction is simple, quick solidifying,
Period is short；With excellent alkali resistance, resistance to ag(e)ing, resistance of chloride ion penetration；Foundation base intension can be promoted, it is flexible to improve material
Property, base course crack risk is reduced, is conducive to extend concrete structure service life, especially suitable for ocean engineering concrete structure
Protective coating.
Concrete osmosis type priming paint of the present invention combines two kinds of coating of epoxy coating and polyaspartate polyurea coating
Advantage both ensure that permeability, promote foundation base intension, and also using the high-strength flexible nature of paint film, reduced the risk of base course crack.
Thick starch of the invention adds the complex function powder that a small amount of nanometer titanium dioxide-coated inorganic particle is formed in weather-proof finishing coat
Body, complex function powder surface have a large amount of hydroxyl group, and complex function powder is not only the simple dispersion in resin, and
It is to exist to act synergistically with Isocyanate prepolymers body and toughening modifying polyaspartic ester resin etc. elastic in formula, brings
Advantageous effect be that film tensile strength is high, elongation percentage is high, adhesion strength is moderate, can form effective stripping area, significantly carry
Rise the crack tracing ability of concrete protection material；The content of organics to volatilize in use is reduced, makes coating more ring
It protects；So that water-repellent paint coating surface compactness of the present invention improves, preferably cover by the surface of protective, improve resisting chloride ion penetration
Permeability；Resilience of the coating to ultraviolet light of water-repellent paint is strengthened, is conducive to prolong the service life.
Specific embodiment
Technical scheme of the present invention is clearly and completely described below in conjunction with the embodiment of the present invention：
Examples 1 to 3
Osmosis type base paint formulation composition is as shown in table 1 in the embodiment of the present invention 1~3：
1 osmosis type base paint formulation of table forms
The A of 1~3 osmosis type priming paint of the embodiment of the present invention1Component and B1Component is matched according to table 1, after the A that will prepare1Group
Point and B1Component is by NCO equivalents and NH equivalents proportioning 1:1 uniformly mixed sample preparation, and progressive is tested, performance test Primary Reference
HG/T 4566-2013《Epoxy resin primer》, testing result is as shown in table 2：
2 osmosis type primer performance testing result of table
It is thick in the embodiment of the present invention 1~3 to starch shown in weather-proof antisepsis finishing paint formula composition the following table 3：
Table 3 is thick to starch weather-proof topcoat formulation composition
Complex function powder 1：Coated by titanium dioxide calcium carbonate；Complex function powder 2：Coated by titanium dioxide barium sulfate；Compound work(
It can powder 3：Coated by titanium dioxide silicon powder.
The thick A for starching weather-proof finishing coat in the embodiment of the present invention 1~32Component and B2Component is matched according to table 3, after according to above-mentioned
Thickness is starched weather-proof finishing coat preparation method and is prepared, and the A that will be prepared2Component and B2Component is by NCO equivalents and NH equivalents proportioning 1:1 is mixed
Close uniform sample preparation progressive test, performance test Primary Reference GB/T 16777-2008《Test methods for building waterproof coatings》、
JT/T 821.3-2011《Concrete bridge structure surface anticorrosive paint~flexible paint》、GB/T 9274-1988《Colored paint and
The measure of varnish resistant to liquid medium》, testing result is as shown in table 4：
Table 4 is thick to starch weather-proof finishing coat performance test results
Concrete osmosis type priming paint of the present invention and the thick protection system for starching weather-proof finishing coat composition are in concrete protection
In application, its material high solid content and low viscosity, environmental protection, one-pass film-forming, construction is simple, quick solidifying, period are short, have excellent alkaline-resisting
Property, resistance to ag(e)ing, can promote foundation base intension, improve material flexibility, reduce base course crack risk, be obviously improved concrete protection
The crack tracing ability of material is conducive to extend concrete structure service life, especially suitable for ocean engineering concrete structure
Protective coating.
Claims (10)
1. a kind of concrete protective coating system, which is characterized in that weather-proof finishing coat is starched including concrete osmosis type priming paint and thickness,
The osmosis type priming paint includes A1Component and B1Component, A1Component and B1Constituent mass ratio is 3:1~1:1, wherein,
A1Component, in percentage by weight, comprising：Low viscosity epoxy resin 10%~30%, isocyanate component 60%~
85%, reactive diluent 0%~10%；
B1Component, in percentage by weight, comprising：Polyaspartic ester resin 40%~85%, polyamine 14%~
59%, accelerating agent 0%~10%, levelling agent 0.2%~0.5%, antifoaming agent 0.2%~0.5%；
The thick weather-proof finishing coat of slurry includes A2Component and B2Component, A2Component and B2Constituent mass ratio is 1:3~3:1, wherein,
A2Component, in percentage by weight, comprising：Aliphatic poly isocyanate 0%~20%, elastic Isocyanate prepolymers
Body 80%~100%；
B2Component, in percentage by weight, comprising：Polyaspartic ester resin 30%~50%, the poly- lucid asparagus of toughening modifying
Ammonia acid ester resin 25%~45%, dispersant 0.3%~0.5%, levelling agent 0.2%~0.5%, antifoaming agent 0.2%~
0.5%, color stuffing 5%~15%, complex function powder 2%~10%, the complex function powder is nanometer titanium dioxide-coated
Inorganic particle.
2. concrete protective coating system as described in claim 1, which is characterized in that in the concrete osmosis type priming paint
In, the low viscosity epoxy resin is bisphenol-A class, bisphenol F type epoxy resins, hydrogenated epoxy resin, PU modified epoxies, core
Shell is epoxy resin toughened, the mixture of one or more of the dimer acid modified epoxy resin of high resiliency；
The isocyanate component is the modifier of diisocyanate and polyether polyol or diisocyanate and polyether polyols
The dimer or diisocyanate of alcohol and the tripolymer of polyether polyol.
3. concrete protective coating system as described in claim 1, which is characterized in that in the concrete osmosis type priming paint
In, the reactive diluent is allyl glycidyl ether, the contracting of benzyl glycidyl ether, butyl glycidyl ether, dodecyl
Water glycerin ether, tetrahydrophthalic acid 2-glycidyl ester, o-phthalic acid diglycidyl ester, 4,5- 7-oxa-bicyclo[4.1.0-1,
2- dicarboxylic acid diglycidyl esters, polypropylene glycol diglycidyl ether, polyethyleneglycol diglycidylether, neopentyl glycol two shrink
The mixture of one or more of glycerin ether.
4. concrete protective coating system as described in claim 1, which is characterized in that in the concrete osmosis type priming paint
In, the polyaspartic ester resin is reacted by dicarboxylic esters with primary amine compound to be prepared, the accelerating agent
It is one or more in nonyl phenol, dibutyl tin laurate, stannous octoate, isooctyl acid bismuth.
5. concrete protective coating system as described in claim 1, which is characterized in that in the concrete osmosis type priming paint
In, the polyamine is the low molecular weight amine compound containing two or more molecule of primary amine.
6. concrete protective coating system as claimed in claim 5, which is characterized in that the polyamine for diethylenetriamine,
One or both of triethylene tetramine, isophorone diamine.
7. concrete protective coating system as described in claim 1, which is characterized in that in the concrete osmosis type priming paint, A1
Component and B1NCO equivalents and NH equivalents proportioning are 1 in component:1；In the thick weather-proof finishing coat of slurry, A2Component and B2NCO in component
Equivalent is 1 with NH equivalents proportioning:1.
8. concrete protective coating system as described in claim 1, which is characterized in that described in the thick weather-proof finishing coat of slurry
Inorganic particle is at least one in calcium carbonate, barium sulfate, wollastonite in powder, silicon powder, diatomite, kaolin, mica powder, talcum powder
Kind.
9. concrete protective coating system as described in claim 1, which is characterized in that described in the thick weather-proof finishing coat of slurry
Aliphatic polymeric isocyanate is dicyclohexyl methyl hydride diisocyanate and/or the monomer or two of hexamethylene-diisocyanate
Diphenylmethane diisocyanate and/or the dimer of hexamethylene-diisocyanate or dicyclohexyl methyl hydride diisocyanate
The tripolymer of ester and/or hexamethylene-diisocyanate；
The elasticity Isocyanate prepolymers body is Polyether Polyisocyanate Prepolymer or polyester-type Isocyanate prepolymers body；
The levelling agent is at least one of organosilicon levelling agent and polyacrylate flow agent；
The antifoaming agent is at least one of organic silicon defoamer and mineral oil antifoam agent.
10. a kind of construction method, this method uses claim 1-9 any one of them concrete protective coatings system such as to carry out
Construction, includes the following steps：
Base treatment：Polishing ground handles crack shrinkage joint, and oil removing removes laitance, until base is smooth, clean, dry；
Osmosis type priming paint is constructed：After base treatment, 1~2 sub-percolation type priming paint, 100 μm~200 μm of overall thickness are brushed；
Thickness starches weather-proof finishing coat construction：After 2h is completed in the coating of osmosis type priming paint, the weather-proof finishing coat of 1~2 time thick slurry, 500 μ of overall thickness are brushed
M~1000 μm.
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| CN110408292A (en) * | 2019-08-21 | 2019-11-05 | 中建美科技有限公司 | Concrete anti-corrosive paint and its manufacturing method |
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| CN113637382A (en) * | 2021-06-24 | 2021-11-12 | 中国海洋石油集团有限公司 | Water-based epoxy protective coating system for nuclear power station concrete and preparation method thereof |
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| CN110408292A (en) * | 2019-08-21 | 2019-11-05 | 中建美科技有限公司 | Concrete anti-corrosive paint and its manufacturing method |
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| CN113637382A (en) * | 2021-06-24 | 2021-11-12 | 中国海洋石油集团有限公司 | Water-based epoxy protective coating system for nuclear power station concrete and preparation method thereof |
| CN114058239A (en) * | 2021-11-25 | 2022-02-18 | 深圳安盾海洋新材料有限公司 | Cement-based anti-permeability anticorrosive multilayer coating and application method thereof |
| CN115595062A (en) * | 2022-12-12 | 2023-01-13 | 甘肃省交通规划勘察设计院股份有限公司（Cn） | Multifunctional concrete protective paste and preparation method thereof |
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