CN109487965B - Construction process of waterproof breathable clear water-imitated concrete coating - Google Patents
Construction process of waterproof breathable clear water-imitated concrete coating Download PDFInfo
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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
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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
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
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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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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Abstract
The invention discloses a construction process of a waterproof and breathable clear water-imitated concrete coating, which is characterized by comprising the following steps of: (1) treating a base surface, namely filling gaps, cracks and depressions, polishing and flattening, hanging anti-cracking grid cloth on the base surface, and constructing a putty layer; (2) constructing a primer; (3) constructing a color difference adjusting material, dipping the color modifier B, beating and embossing on the base surface of the dried primer, and surviving once; dipping the color modifier C, continuously beating and embossing, and surviving twice; finally, dipping the color modifier A, and continuously beating and embossing to survive once; (4) finishing construction; (5) and (5) finishing agent construction. The invention directly takes the common concrete as the processing base material, the surface of the base material is modified, the production cost is greatly reduced, the putty layer is constructed to repair the base surface defects, and simultaneously, the whole base surface is completely covered by the putty and is in a uniform state, so the combination of the base material and the coating is tight and reliable.
Description
Technical Field
The invention relates to concrete decoration, in particular to a construction process of a waterproof and breathable clear water-imitated concrete coating.
Background
The fair-faced concrete is molded by one-step casting without any external decoration, the natural surface effect of the concrete is directly used as a veneer, the traditional plastering, inlaying and other whitewash procedures can be omitted, and the surface of the fair-faced concrete is required to be flat and smooth, uniform in color and luster, clear in edges and corners, free of damage and pollution. Therefore, the bare concrete has extremely high requirements on materials, processes and templates, and the manufacturing cost is 7-8 times of that of the common concrete. If the surface of the common concrete can be modified to make the surface of the common concrete reach the material and texture of the fair-faced concrete, the appearance quality can be ensured, and the cost can be greatly reduced.
However, the common concrete has the defects of common cold joint, efflorescence, rust spots, pitted surface, honeycomb and the like, and the high standard requirement of the surface of the fair-faced concrete is difficult to achieve. It must be post-repaired and painted.
The Chinese patent application No. CN 103146302A discloses a coating for protecting fair-faced concrete and a construction process thereof, and comprises base surface treatment, primary coating, intermediate coating and top coating. The base surface treatment adopts cement repairing treatment, only larger cracks and defects are filled, and the middle coating is a coloring layer which has the effect close to the effect of the required fair-faced concrete. The process has the following defects: 1. the original base material is the bare concrete, so the cost is high; 2. the basal plane treatment only fills up larger cracks and defects, the repair is not completely covered, the appearance states of the repaired part and the un-repaired part are not uniform, and the repaired part and the un-repaired part cannot be tightly combined with the coating; 3. the shrinkage inconsistency between the repaired part and the base material is easy to crack; 4. whether the other defects can be repaired completely or not in the subsequent primer construction is difficult to guarantee, and if the primer is too thick to cover the defects, the quality of the coating is affected.
Therefore, a construction process of the waterproof and breathable type clear water concrete imitation coating, which is easy to operate, has high coating quality and is consistent with the surface texture of the clear water concrete, needs to be developed.
Disclosure of Invention
The invention aims to solve the defects of the background technology and provide a construction process of a waterproof and breathable clear water imitation concrete coating, which is easy to operate, has high coating quality and imitates the surface texture of clear water concrete.
The technical scheme of the invention is as follows: a construction process of a waterproof and breathable type clear water-imitated concrete coating is characterized by comprising the following steps:
(1) base surface treatment
Filling gaps, cracks and depressions, polishing and flattening, hanging anti-cracking grid cloth on the base surface, and constructing a putty layer;
(2) priming paint construction
After the putty layer is dried completely, coating a silicon resin primer;
(3) construction of adjusting material
Mixing a silicon resin adjusting material and water according to a mass ratio of 1: 1-1.5 to obtain a color modifier A, and mixing a silicon resin adjusting material with water and yellow color paste according to a mass ratio of 1: 1-1.5: 0.05-0.1, uniformly preparing to obtain a color modifier B, and mixing the silicon resin adjusting material with water and black color paste according to the mass ratio of 1: 1-1.5: 0.05-0.1, uniformly preparing to obtain a color modifier C;
dipping the color modifier B, beating and embossing on the base surface of the dried primer, and surviving once; dipping the color modifier C, continuously beating and embossing, and surviving twice; finally, dipping the color modifier A, and continuously beating and embossing to survive once;
(4) finish paint construction
Coating a silicone finish after the adjusting material is dried completely;
(5) construction of finishing agent
And after the finish paint is dried completely, coating a fluorine-silicon resin finishing agent.
Preferably, filling materials used for gaps, cracks and depressions in the step (1) are gray elastic putty powder and water according to a mass ratio of 1: 0.5-1.0 parts by weight.
Preferably, the putty layer constructed in the step (1) is as follows:
mixing gray elastic putty powder and water according to a mass ratio of 1: 0.5-1.0, uniformly stirring, standing for 10-20 minutes, uniformly stirring again to obtain putty, performing primary scraping operation by using the putty, enabling the putty to penetrate through the anti-cracking gridding cloth to bond the anti-cracking gridding cloth on a base surface, and performing secondary scraping operation after the putty is dried thoroughly.
Preferably, the silicone resin conditioning material in the step (3) comprises the following components in percentage by mass: 20-30% of pure acrylic emulsion, 10-15% of organic silicon emulsion, 15-20% of natural stone powder, 8-10% of talcum powder, 0.2-0.5% of defoaming agent, 0.3-0.5% of preservative, 0.2-0.5% of dispersing agent, 0.5-1% of thickening agent and the balance of water.
Further, the silicone resin adjusting material in the step (3) comprises the following components in percentage by mass: 25% of pure acrylic emulsion, 10% of organic silicon emulsion, 20% of natural stone powder, 8% of talcum powder, 0.2% of defoaming agent, 0.3% of preservative, 0.5% of dispersing agent, 1% of thickening agent and the balance of water.
Preferably, the silicone primer in the step (2), the silicone finish in the step (4) and the fluorosilicone finishing agent in the step (5) are applied by spraying or rolling.
The invention has the beneficial effects that:
1. the common concrete is directly used as a processing base material, and the surface of the base material is modified, so that the production cost is greatly reduced.
2. The laying of the anti-cracking grid cloth avoids the cracking caused by the self shrinkage of the concrete, and simultaneously avoids the cracking of the coating caused by the inconsistent shrinkage of the external coating and the concrete, so that the whole base surface is stably combined with the coating.
3. The putty layer is constructed to repair the base surface defects, and meanwhile, the whole base surface is completely covered by the putty and is in a uniform state, so that the base material and the coating are tightly and reliably combined. The putty layer also plays a role in adhering the anti-cracking grid cloth to the base surface.
4. The primer can penetrate into the concrete base material, a uniform compact hydrophobic layer is formed on the capillary wall in the concrete, and meanwhile, the adhesive force between the coating and the base material is increased; the color difference adjusting material is formed by adding color paste with weaker covering power into a silicon resin adjusting material, three layers of color modifying agents are superposed to obtain color and texture which are consistent with the surface of the fair-faced concrete, and sponge materials with cavities are adopted for beating and embossing to obtain texture which is consistent with the surface of the fair-faced concrete, so that the treated surface has high consistency with the surface of the fair-faced concrete; the finish paint mainly plays a role in weather resistance and corrosion resistance; the finishing agent can improve the graffiti resistance, air permeability, weather resistance, stain resistance and chemical stability of the coating.
5. The silicone resin regulating material contains high molecular material acrylic emulsion, organosilicon emulsion and inorganic material stone powder, and the stone powder particles form micropores during high molecular crosslinking, so that moisture can be separated out from the coating, and the silicone resin regulating material has good air permeability, so that the silicone resin regulating material has a self-breathing function.
Drawings
FIG. 1 is a process flow diagram of the present invention
Detailed Description
The following specific examples further illustrate the invention in detail.
As shown in figure 1, the construction process of the waterproof breathable clear water-imitated concrete coating provided by the invention comprises the following steps of:
(1) base surface treatment
And (3) carrying out concrete pouring and maintenance according to the requirements of concrete structure engineering construction Specification GB 5066-2011. The base is required to be clean, smooth, firm and free of impurities. Gray elastic putty powder and water are utilized according to the mass ratio of 1: 0.5 evenly preparing a filling material, filling gaps, cracks and sunken parts of a base surface to be treated with the filling material, polishing the gaps, cracks and sunken parts to be treated, hanging anti-cracking grid cloth on the base surface, and constructing a putty layer: mixing gray elastic putty powder and water according to a mass ratio of 1: 0.5, uniformly stirring, standing for 10-20 minutes, uniformly stirring again to obtain putty, performing primary scraping operation by using the putty, penetrating the putty through the anti-cracking grid cloth to bond the anti-cracking grid cloth on the base surface, and performing secondary scraping operation after the putty is completely dried; the total thickness of the batch hanging is 0.8-1.5 mm.
(2) Priming paint construction
After the putty layer is dried completely, coating a silicone primer, wherein the primer is coated by rolling once, and corners and the whole body are rolled uniformly;
(3) construction of chromatic aberration adjusting material
Mixing a silicon resin adjusting material and water according to a mass ratio of 1: 1, uniformly preparing a color modifier A, and mixing a silicon resin adjusting material with water and yellow color paste according to a mass ratio of 1: 1: 0.05 to obtain a color modifier B, and mixing the silicon resin adjusting material with water and black color paste according to the mass ratio of 1: 1: 0.05 evenly preparing to obtain a color modifier C;
dipping the sponge into the dressing agent B, beating the flower on the base surface with the dried primer (the beating is not too strong, the beating is carried out slightly, the beating is not too dense and is not too regular) and beating once to survive, wherein the dressing agent B is preferably not dropped when the sponge is lifted; dipping the color modifier C with seaweed sponge, continuously beating and embossing for two times, and constructing under the condition that the front coating is dried completely (or after 2 hours) for the second time; finally, dipping the color modifier A with the seaweed sponge, and continuously beating and embossing to survive once;
(4) finish paint construction
After the adjusted material is dried completely, coating a silicone finish, adopting spraying, surviving twice, and constructing under the condition that the front coating is dried completely (or after 2 hours) for the second time;
(5) construction of finishing agent
After the finish paint is dried completely, coating the fluorosilicone resin finishing agent, and adopting spraying to survive once.
The silicone resin primer in the step (2), the silicone resin finish in the step (4) and the finishing agent in the step (5) can be sprayed or roll-coated as required.
The silicone resin adjusting material in the step (3) comprises the following components in percentage by mass: 35% of water, 25% of pure acrylic emulsion, 10% of organic silicon emulsion, 20% of natural stone powder, 8% of talcum powder, 0.2% of defoaming agent, 0.3% of preservative, 0.5% of dispersing agent, 1% of thickening agent and the balance of water. The preparation method comprises the following steps: at normal temperature, adding water, pure acrylic emulsion and organic silicon emulsion at the stirring speed of 800rpm, keeping stirring for 15min, adding natural stone powder and talcum powder, stirring at the high speed of 1500rpm for 20 min, then slowing to 800rpm, slowly adding a defoaming agent, a preservative, a dispersing agent and a thickening agent, continuously stirring for 20 min, and discharging to obtain the silicone resin conditioning material.
Example 2
(1) Base surface treatment
The filling-removing material is gray elastic putty powder and water according to the mass ratio of 1: 0.6, the putty is putty powder and water according to the mass ratio of 1: 0.6 was uniformly distributed, and the rest was the same as in the step (1) in example 1;
(2) the primer construction is the same as the step (2) in the example 1;
(3) construction of chromatic aberration adjusting material
The steps are the same as the step (3) in the embodiment 1 except that the formulas of the silicone resin adjusting material, the color modifier A, the color modifier B and the color modifier C are different;
wherein the silicone resin adjusting material comprises the following components in percentage by mass: 33% of water, 26% of pure acrylic emulsion, 15% of organic silicon emulsion, 15% of natural stone powder, 9% of talcum powder, 0.3% of defoaming agent, 0.5% of preservative, 0.4% of dispersing agent and 0.8% of thickening agent;
the mass ratio of the silicone resin adjusting material to water is 1: 1.2, uniformly preparing to obtain a color modifier A, and mixing a silicon resin adjusting material with water and yellow color paste according to a mass ratio of 1: 1.5: 0.07 to obtain a color modifier B, and mixing the silicon resin adjusting material with water and black color paste according to the mass ratio of 1: 1.5: 0.06 evenly preparing to obtain a color modifier C;
(4) finish coat application, and finish coat application (5) are the same as in steps (4) and (5) of example 1.
Example 3
(1) Base surface treatment
The filling-removing material is gray elastic putty powder and water according to the mass ratio of 1: 0.7, the putty is putty powder and water according to the mass ratio of 1: 0.7 was uniformly distributed, and the rest was the same as in the step (1) in example 1;
(2) the primer construction is the same as the step (2) in the example 1;
(3) construction of chromatic aberration adjusting material
The steps are the same as the step (3) in the embodiment 1 except that the formulas of the silicone resin adjusting material, the color modifier A, the color modifier B and the color modifier C are different;
wherein the silicone resin adjusting material comprises the following components in percentage by mass: 27.8% of water, 28% of pure acrylic emulsion, 14% of organic silicon emulsion, 18% of natural stone powder, 10% of talcum powder, 0.5% of defoaming agent, 0.4% of preservative, 0.3% of dispersing agent and 1% of thickening agent;
the mass ratio of the silicone resin adjusting material to water is 1: 1.5, uniformly preparing to obtain a color modifier A, and mixing a silicon resin adjusting material with water and yellow color paste according to a mass ratio of 1: 1.3: 0.08, uniformly preparing to obtain a color modifier B, mixing the silicon resin adjusting material with water and black color paste according to the mass ratio of 1: 1.5: 0.1, evenly preparing to obtain a color modifier C;
(4) finish coat application, and finish coat application (5) are the same as in steps (4) and (5) of example 1.
Example 4
(1) Base surface treatment
The filling-removing material is gray elastic putty powder and water according to the mass ratio of 1: 1, the putty is putty powder and water according to the mass ratio of 1: 1 is the same as the step (1) in example 1 except that the other components are uniformly distributed;
(2) the primer construction is the same as the step (2) in the example 1;
(3) construction of chromatic aberration adjusting material
The steps are the same as the step (3) in the embodiment 1 except that the formulas of the silicone resin adjusting material, the color modifier A, the color modifier B and the color modifier C are different;
wherein the silicone resin adjusting material comprises the following components in percentage by mass: 32.3% of water, 30% of pure acrylic emulsion, 12% of organic silicon emulsion, 16% of natural stone powder, 8% of talcum powder, 0.4% of defoaming agent, 0.4% of preservative, 0.2% of dispersing agent and 0.7% of thickening agent;
the mass ratio of the silicone resin adjusting material to water is 1: 1.3, uniformly preparing to obtain a color modifier A, and mixing a silicon resin adjusting material with water and yellow color paste according to a mass ratio of 1: 1.4: 0.1, uniformly preparing to obtain a color modifier B, mixing the silicon resin adjusting material with water and black color paste according to the mass ratio of 1: 1.1: 0.08, uniformly preparing to obtain a color modifier C;
(4) finish coat application, and finish coat application (5) are the same as in steps (4) and (5) of example 1.
The product types used are as follows:
gray elastic putty powder: manufactured by Shanghai Linuo building decoration Material Co., Ltd, Jiale brand;
finishing paint: changsha Runma New Material science and technology Limited, SA bare concrete protectant;
primer coating: jiangsu Wojia new material science and technology limited, organosilicon nano-permeable waterproof coating;
pure acrylic emulsion: japanese showa emulsion, model AP 4765;
silicone emulsion: wake chemical Co., Ltd, Germany, model number BS 43N;
finishing agent: the model CP-FG is provided by Zhongjian Erhang Wuhan estuary new material company;
natural stone powder: the main component of the mineral powder is hydrous calcium carbonate (the mass fraction is more than or equal to 95 percent) and the particle size is 800 meshes;
talc powder: wuhanshuangxin mineral powder, Inc.; the grain diameter is 800 meshes;
defoaming agent: model XCL provided by Zhongjian Erhang Wuhan Bay New Material Co;
preservative: model SF, supplied by Zhongjian two-way Wuhan estuary New Material Co;
dispersing agent: the model CP-FS is provided by Zhongjian second navigation Wuhan estuary new material company;
thickening agent: the model CP-ZC is provided by Zhongjian Erhang Wuhan estuary new material company;
the performance of the concrete surface integral coating constructed by the embodiment is tested
The test contents and test standards are as follows.
(1) Appearance of the product
Transparent, uniform and no sagging, and adopts an eye measurement method.
(2) Adhesion of coatings
And testing the adhesive force of the coating by adopting a pull-open method according to JTS239-2015 technical Specification for physical detection of concrete structures in water transportation engineering and JTS153-2015 design Standard for durability of water transportation engineering structures.
(3) Scrub resistance, water resistance, alkali resistance
According to GB/T9755-2014 synthetic resin emulsion exterior wall coating.
(4) Ultraviolet aging resistance of coating
The test was carried out according to GB/T1865-2009 xenon arc radiation filtered by artificial weathering and artificial radiation exposure for pigmented paints and varnishes.
(5) Water resistance of coating
According to European standard EN 1062-1: 2002 "exterior coatings and coating systems Classification-1 on coats of pigmented and clearcoats and concrete substrates".
(6) Permeability of coating
According to GB/T17146-1997 test method for the water vapor permeability of building materials and EN ISO 7783-2: 1999 class of paint and varnish systems and coatings on concrete substrates-determination and classification of air permeability test.
The test results are shown in table 1 below.
Table 1 test results of performance of clear water concrete coating
The test result shows that the coating obtained by the construction process of the waterproof and breathable clear water-imitated concrete coating has adhesive force, scrub resistance, water resistance, alkali resistance, weather resistance and waterproofness which all meet the index requirements and has good breathability.
Claims (3)
1. A construction process of a waterproof and breathable type clear water-imitated concrete coating is characterized by comprising the following steps:
(1) base surface treatment
Filling gaps, cracks and depressions, polishing and flattening, hanging anti-cracking grid cloth on a base surface, and constructing a putty layer, wherein the putty layer is formed by hanging gray elastic putty powder and water according to a mass ratio of 1: 0.5-1.0 of the mixture is uniformly stirred, the mixture is kept stand for 10-20 minutes and uniformly stirred again to obtain putty, the putty is used for carrying out primary scraping operation, the putty penetrates through the anti-cracking gridding cloth to adhere the anti-cracking gridding cloth on the base surface, and secondary scraping operation is carried out after the putty is dried completely;
(2) priming paint construction
After the putty layer is dried completely, coating a silicon resin primer;
(3) construction of chromatic aberration adjusting material
Mixing a silicon resin adjusting material and water according to a mass ratio of 1: 1-1.5 to obtain a color modifier A, and mixing a silicon resin adjusting material with water and yellow color paste according to a mass ratio of 1: 1-1.5: 0.05-0.1, uniformly preparing to obtain a color modifier B, and mixing the silicon resin adjusting material with water and black color paste according to the mass ratio of 1: 1-1.5: 0.05-0.1, uniformly preparing to obtain a color modifier C, wherein the silicone resin adjusting material comprises the following components in percentage by mass: 25% of pure acrylic emulsion, 10% of organic silicon emulsion, 20% of natural stone powder, 8% of talcum powder, 0.2% of defoaming agent, 0.3% of preservative, 0.5% of dispersing agent, 1% of thickening agent and the balance of water;
dipping the color modifier B with seaweed sponge, beating and embossing on the base surface with the dried primer, and surviving once; dipping the color modifier C with seaweed sponge, continuously beating and embossing, and surviving twice; finally, dipping the color modifier A with the seaweed sponge, and continuously beating and embossing to survive once;
(4) finish paint construction
Coating a silicone finish after the adjusting material is dried completely;
(5) construction of finishing agent
And after the finish paint is dried completely, coating a fluorine-silicon resin finishing agent.
2. The construction process of the waterproof breathable type clear water-imitated concrete coating as claimed in claim 1, wherein the filling materials used in the gaps, cracks and depressions in the step (1) are gray elastic putty powder and water in a mass ratio of 1: 0.5-1.0 parts by weight.
3. The construction process of the waterproof and breathable type clear water concrete imitation coating according to claim 1, wherein the silicone primer in the step (2), the silicone finish in the step (4) and the fluorosilicone finishing agent in the step (5) are applied by spraying or rolling.
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| CN111826038B (en) * | 2020-06-30 | 2022-01-14 | 固克节能科技股份有限公司 | Composite coating of cloud-flowing texture paint and construction method thereof |
| CN112411910A (en) * | 2020-11-06 | 2021-02-26 | 北京易晟元环保工程有限公司 | Construction method for creating clear water effect on concrete base surface |
| CN112811935A (en) * | 2020-12-31 | 2021-05-18 | 苏州佳固士新材料科技有限公司 | Chromatic aberration adjusting material suitable for concrete and preparation method and application thereof |
| CN113738040A (en) * | 2021-09-15 | 2021-12-03 | 南京华典建设(集团)有限公司 | Novel construction process for fresh water concrete wall surface texture |
| CN115029062A (en) * | 2022-06-28 | 2022-09-09 | 重庆锦弘新材料技术工程有限公司 | Tunnel concrete surface anti-pollution brightening protection system and construction method thereof |
| CN115491071B (en) * | 2022-08-31 | 2024-02-20 | 陕西瑞盾建筑工程有限公司 | Processing material of bare concrete facing and preparation method of bare concrete facing |
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| CN101876162A (en) * | 2009-04-30 | 2010-11-03 | 上海惠邦特种涂料有限公司 | Durability traceless repair method for road and bridge concrete, color difference trimming putty and trimming material |
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| CN106593001A (en) * | 2016-12-16 | 2017-04-26 | 山东电力建设第工程公司 | Clear water concrete wall surface repairing method |
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| FR2551121A2 (en) * | 1983-08-05 | 1985-03-01 | David Jean | Method for cladding walls of buildings and elements for the implementation of this method. |
| CN105839935A (en) * | 2016-03-29 | 2016-08-10 | 上海科焱建筑装饰工程有限公司 | Concrete surface repairing method |
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|---|---|---|---|---|
| CN101876162A (en) * | 2009-04-30 | 2010-11-03 | 上海惠邦特种涂料有限公司 | Durability traceless repair method for road and bridge concrete, color difference trimming putty and trimming material |
| CN204174859U (en) * | 2014-10-17 | 2015-02-25 | 台州市中凯实业有限公司 | Self-clean type outer wall coating structure |
| CN106593001A (en) * | 2016-12-16 | 2017-04-26 | 山东电力建设第工程公司 | Clear water concrete wall surface repairing method |
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