Water-based high-weather-resistance fair-faced concrete protective coating system and preparation method thereof
阅读说明：本技术 一种水性高耐候清水混凝土保护涂层体系及其制备方法 (Water-based high-weather-resistance fair-faced concrete protective coating system and preparation method thereof ) 是由 单韧 彭杰 黄松 李军 谭文红 于 2020-09-04 设计创作，主要内容包括：本发明公开了一种水性高耐候清水混凝土保护涂层体系及其制备方法,属于建筑材料技术领域。保护涂层体系为水性环氧树脂固化涂层、水性氟碳树脂固化涂层、含色浆的水性氟碳树脂固化涂层以及高氟含量的水性氟碳树脂固化涂层的复合涂层体系。该保护涂层体系施工过程简单、绿色环保,且具有粘接力强、耐腐蚀性好、耐候性好、使用寿命长等优异性能,既能保留清水混凝土的本质美感,又能提供超强耐候性、超强粘接力、长久使用不起皮不脱落的防护效果,进而延长了混凝土结构的使用寿命,适用于各种清水混凝土建筑的长效保护。(The invention discloses a water-based high-weather-resistance bare concrete protective coating system and a preparation method thereof, belonging to the technical field of building materials. The protective coating system is a composite coating system of a waterborne epoxy resin curing coating, a waterborne fluorocarbon resin curing coating containing color paste and a waterborne fluorocarbon resin curing coating with high fluorine content. The protective coating system is simple in construction process, green and environment-friendly, has excellent performances of strong bonding force, good corrosion resistance, good weather resistance, long service life and the like, can keep the essential aesthetic feeling of the fair-faced concrete, can provide the protective effects of super weather resistance, super bonding force and long-term use without peeling and falling, further prolongs the service life of a concrete structure, and is suitable for long-term protection of various fair-faced concrete buildings.)
1. The utility model provides a high resistant bare concrete protective coating system of waiting of waterborne, its characterized in that: sequentially arranging a bottom coating, a middle coating, a color-mixing coating and a surface coating on the surface of the bare concrete;
the base coat is a waterborne epoxy resin cured coat;
the intermediate coating is a water-based fluorocarbon resin curing coating;
the color-mixing coating is a water-based fluorocarbon resin curing coating containing color paste;
the surface coating is a high-fluorine-content water-based fluorocarbon resin cured coating; the fluorine content of the high-fluorine-content water-based fluorocarbon resin is higher than 20%.
2. The preparation method of the water-based high weather-resistant bare concrete protective coating system as claimed in claim 1, which is characterized in that: polishing and cleaning the surface of the bare concrete, then sequentially coating a primer, an intermediate coating, a toning coating and a surface coating, and curing to obtain the coating;
the primer consists of the following components in parts by mass: 50-60 parts of water-based epoxy resin; 1-3 parts of an auxiliary agent; 20-40 parts of water; curing agent
the intermediate coating comprises the following components in parts by mass: 70-85 parts of water-based fluorocarbon resin; 0.8-3 parts of an auxiliary agent; 15-30 parts of water; curing agent6-12 parts of a solvent;
the toning coating comprises the following components in parts by mass: 70-85 parts of water-based fluorocarbon resin; 0.8-3 parts of an auxiliary agent; 10-25 parts of water; 2-5 parts of color paste; curing agent
the top coating comprises the following components in parts by mass: 70-85 parts of high-fluorine-content water-based fluorocarbon resin; 2-4 parts of an auxiliary agent; 10-20 parts of water; curing agent10-20 parts.
3. The preparation method of the water-based high weather-resistant as-cast finish concrete protective coating system as claimed in claim 2, characterized in that: the water-based epoxy resin is at least one of water-based anionic epoxy resin, water-based cationic epoxy resin and water-based nonionic epoxy resin.
4. The preparation method of the water-based high weather-resistant as-cast finish concrete protective coating system as claimed in claim 2, characterized in that: the curing agentIs at least one of modified aromatic amine curing agent, modified aliphatic amine curing agent and modified polyether amine curing agent.
5. The preparation method of the water-based high weather-resistant as-cast finish concrete protective coating system as claimed in claim 2, characterized in that: the fluorine mass percentage content of the aqueous fluorocarbon resin is higher than 8%.
6. The preparation method of the water-based high weather-resistant as-cast finish concrete protective coating system as claimed in claim 5, characterized in that: the waterborne fluorocarbon resin is at least one of waterborne acrylic modified fluororesin, waterborne polyvinylidene fluoride resin, waterborne fluoroolefin-vinyl ether resin and waterborne fluoroolefin-vinyl ester resin.
7. The preparation method of the water-based high weather-resistant as-cast finish concrete protective coating system as claimed in claim 2, characterized in that: the high-fluorine-content water-based fluorocarbon resin is at least one of water-based polyvinylidene fluoride resin, water-based fluoroolefin-vinyl ether resin and water-based fluoroolefin-vinyl ester resin.
8. The preparation method of the water-based high weather-resistant as-cast finish concrete protective coating system as claimed in claim 2, characterized in that: the curing agentIs at least one of modified toluene diisocyanate curing agent, modified diphenylmethane diisocyanate curing agent and modified isophorone diisocyanate curing agent.
9. The preparation method of the water-based high weather-resistant as-cast finish concrete protective coating system as claimed in claim 2, characterized in that:
the auxiliary agent comprises at least one of a dispersing agent, a preservative, a defoaming agent, a neutralizing agent, a thixotropic agent, a flatting agent, a thickening agent, a film forming agent, an ultraviolet absorbent, an antioxidant and a wetting agent;
the color paste is at least one of iron oxide red color paste, iron oxide yellow color paste, titanium white color paste and carbon black color paste.
Technical Field
The invention discloses a protective coating, particularly relates to a water-based high-weather-resistance bare concrete protective coating system and a preparation method thereof, and relates to the technical field of building materials.
Background
The clear water concrete is the highest expression form in the concrete, shows charm in more and more buildings by the elegant plain surface of the clear water concrete, and has the plain, non-cargo and natural and stable artistic effects. As the application of the fair-faced concrete is more and more extensive, the problem of surface protection is more and more prominent.
The fair-faced concrete directly adopts the natural surface effect of the concrete as a veneer, and does not have any material such as coating, tile sticking, stone sticking and the like, so the protection of the fair-faced concrete has the following requirements: (1) the requirement of waterproofing: the fair-faced concrete belongs to a porous substance, has high surface water absorption rate, can become dark after absorbing water, has inconsistent surface water absorption and different colors, and causes poor appearance effect. More importantly, water is a carrier of all corrosive media, the surface is waterproof, the invasion of the corrosive media is avoided, and the service life of the fair-faced concrete is ensured. (2) The durability requirement is as follows: concrete belongs to alkaline substances, and the strength and durability of the concrete can be maintained only by maintaining the alkalinity of the concrete. When the concrete is exposed in nature, the concrete is corroded by rain, carbon dioxide, ultraviolet rays, oil stains and the like, and is carbonized, and the adverse phenomena of yellowing, dull color, pollutant flow marks and the like occur, so that the service life and the appearance decoration effect of the concrete are influenced. (3) Actual engineering requirements: in practice of the fair-faced concrete engineering, it is difficult to ensure that each piece of concrete can reach perfect degree, and problems such as local cold joint, color difference, pitted surface, honeycomb and the like can occur, and special repair and decoration are still required to be carried out on local parts of the concrete, otherwise, the appearance effect is influenced.
The basic requirements of the bare concrete protection system are as follows: (1) original texture and color effects are retained. (2) The bare concrete protection system material has strong bonding strength and long-term weather resistance, and can effectively maintain the effect of the bare concrete and prolong the service life of the concrete. (3) Meets the environmental protection concept of modern society development.
Commonly used protective systems are permeable and film-forming systems. The permeable structure mainly adopts cement-based permeable crystalline and organic silicon permeable materials, the permeable system provides a hydrophobic effect within a range of 2-5 mm on the surface of concrete so as to have certain waterproof and anti-permeability capabilities, but the system has limited protection durability and poor recoatability. CN201872393U discloses a concrete protection coating system, including silane permeable formation, silane hybridization elasticity ventilative isolation layer, surface decorative layer, the concrete protection coating system that this patent discloses has the gas permeability, can not keep apart the invasion, the corruption of gaseous corrosive medium such as carbon dioxide, sulfur dioxide to the concrete, and the guard action to the concrete is limited, and silane is able to bear or endure ultraviolet ageing inferior to fluorocarbon material simultaneously for system life is shorter. The film forming system can form a compact protective layer on the surface of concrete, can prevent water and air from entering the interior of the concrete, and has excellent protective performance. CN102976788A discloses a coating for protecting the surface of clear water concrete, which is composed of a primer, a middle paint and a finish, the coating used in the system is a single-component product, and is a thermoplastic film which is not crosslinked by a curing agent in nature, the adhesion of the coating is general, the cohesive strength and hardness are low, the corrosion resistance and the aging resistance are insufficient, the fluorine content of the key performance index of the fluorocarbon polymer emulsion finish is not specified, and the ultraviolet aging resistance of the system can not be ensured. The coating for protecting the bare concrete and the construction process thereof provided by CN103146302A use single-component products, have the same problems as above, do not make clear requirements for quality inspection of construction sites, and the quality of the construction sites cannot be effectively supervised and detected, so that the actual engineering often cannot achieve the designed protection effect. In addition, with the development of the times, the proportion of labor cost in engineering construction cost is higher and higher, and construction site detection projects and methods are required to be established, so that the quality of single coating is ensured, the recoating times are reduced, and the whole life cycle protection cost of the fair-faced concrete is reduced.
Disclosure of Invention
Aiming at the defects of the bare concrete protective coating system in the prior art, the first purpose of the invention is to provide a water-based high-weather-resistance bare concrete protective coating system which consists of a bottom coating, a middle coating, a toning coating and a surface coating, wherein the bottom coating is a high-adhesion epoxy material coating, the middle coating, the toning coating and the surface coating are all high-weather-resistance fluorocarbon material coatings, and the coatings are all water-based two-component coatings, so that the system has the excellent performances of environmental protection, strong bonding force (the system adhesive force is more than or equal to 2.5MPa or the concrete cohesive failure), good corrosion resistance (the resistance to butanone wiping is more than or equal to 100 times and the bottom leakage is avoided), good weather resistance (the super-fluorescence ultraviolet accelerated aging is 1700h and the pulverization is 0 grade), long service life and the like, the intrinsic aesthetic feeling of the bare concrete can be kept, and the super-weather resistance and the super-strength, The protective effect of no peeling and no falling off after long-term use, thereby prolonging the service life of the concrete structure and being suitable for long-term protection of various clear water concrete buildings.
The second purpose of the invention is to provide a simple, efficient and quality-controllable preparation method of the bare concrete protective coating system, which can effectively control the quality of a construction site and is beneficial to large-scale popularization and application of the bare concrete protective coating system.
In order to realize the technical purpose, the invention provides a water-based high-weather-resistance fair-faced concrete protective coating system, which is characterized in that a base coating, a middle coating, a color-mixing coating and a surface coating are sequentially arranged on the surface of fair-faced concrete; the base coat is a waterborne epoxy resin cured coat; the intermediate coating is a water-based fluorocarbon resin curing coating; the color-mixing coating is a water-based fluorocarbon resin curing coating containing color paste; the surface coating is a high-fluorine-content water-based fluorocarbon resin curing coating.
The primer of the water-based high-weather-resistance clear water concrete protective coating system is an epoxy resin curing system, has the advantages of high strength, corrosion resistance, strong bonding force and the like, can well seal and isolate a concrete base layer, resists the corrosion action of concrete alkalinity on the coating system, and has strong adhesive force with concrete and an intermediate coating. The intermediate coating is a transition layer, plays a role in starting and stopping between the bottom coating and the toning coating, and ensures the bonding strength of the system. The color-mixing coating plays a role in adjusting the color difference of the fair-faced concrete, ensures that the color difference between concretes poured in different batches is eliminated, and simultaneously keeps the appearance effects of the texture and the bulkiness of the fair-faced concrete. The top coat is a fluorocarbon coat with high fluorine content, the fluorine content in the base material is more than 20 percent, the base material is cured at normal temperature, the performance of the top coat can be compared favorably with that of oily fluorocarbon paint, and the top coat has high hardness, self-cleaning property, ultraviolet aging resistance and corrosion resistance. The perfect combination of the four coatings ensures that the water-based high-weather-resistance bare concrete protective coating system has excellent bonding performance, the bonding strength of the protective coating system is more than or equal to 2.5MPa or the protective coating system is cohesive failure of concrete, and the protective coating system does not peel or shell and fall off in the long-term use process; the super-fluorescent ultraviolet aging-resistant coating has excellent weather resistance, the super-fluorescent ultraviolet accelerated aging of a protection system is 1700h pulverization 0 grade, the weather aging resistance is good after long-term use, the effective protection time limit can reach 20 years, and the cost is saved in the service life cycle of a fair-faced concrete structure.
The invention also provides a preparation method of the water-based high-weather-resistance bare concrete protective coating system, which comprises the steps of polishing and cleaning the surface of bare concrete, and then sequentially coating a primer, an intermediate coating, a toning coating and a surface coating;
the primer consists of the following components in parts by mass: 50-60 parts of water-based epoxy resin; 1-3 parts of an auxiliary agent; 20-40 parts of water; curing agent
the intermediate coating comprises the following components in parts by mass: 70-85 parts of water-based fluorocarbon resin; 0.8-3 parts of an auxiliary agent; 15-30 parts of water; curing agent
the toning coating comprises the following components in parts by mass: 70-85 parts of water-based fluorocarbon resin; 0.8-3 parts of an auxiliary agent; 10-25 parts of water; 2-5 parts of color paste; curing agent8-15 parts;
the top coating comprises the following components in parts by mass: 70-85 parts of high-fluorine-content water-based fluorocarbon resin; 2-4 parts of an auxiliary agent; 10-20 parts of water; curing agent10-20 parts. .
In a preferred embodiment, the aqueous epoxy resin is at least one of an aqueous anionic epoxy resin, an aqueous cationic epoxy resin and an aqueous nonionic epoxy resin. These aqueous epoxy resins are commercially available, and as the anionic epoxy resin, GL1900 aqueous epoxy emulsion from cantonese may be selected. The cationic epoxy resin can be AB-EP-20(W60) aqueous epoxy resin emulsion produced by New Material of Anbang, Zhejiang. The water-based non-ionic epoxy resin can be selected from water-based epoxy resin WB3002 of Dow chemistry.
As a preferred embodiment, the curing agent
As a preferable scheme, the fluorine mass percentage content of the aqueous fluorocarbon resin is higher than 8%.
In a preferred embodiment, the aqueous fluorocarbon resin is at least one of an aqueous acrylic-modified fluororesin, an aqueous polyvinylidene fluoride resin, and an aqueous fluoroolefin-vinyl ether (ester) resin. These aqueous fluorocarbon resins are commercially available products, and as the aqueous acrylic modified fluororesin, DF-S06 available from Tokyo fluorine industries can be selected. The aqueous polyvinylidene fluoride resin can be selected from aqueous fluorine emulsion ZEFFLE SE of Japan Dajin. The aqueous fluoroolefin-vinyl ether (ester) resin may be warfarin aqueous fluororesin E670.
As a preferable mode, the fluorine content of the high fluorine content aqueous fluorocarbon resin is higher than 20%.
As a further preferable scheme, the high fluorine content aqueous fluorocarbon resin is at least one of aqueous polyvinylidene fluoride resin, aqueous fluoroolefin-vinyl ether resin and aqueous fluoroolefin-vinyl ester resin (the high fluorine content aqueous fluorocarbon resin is a commercial product, and the selectable type and the purchase address are as described above). The intermediate coating and the toning coating in the water-based high-weather-resistance clear water concrete protective coating system are transition layers in the protective coating system, the requirement on interlayer adhesion is good, and the requirement on fluorine content is slightly low, and the top coating is the outermost layer of the composite coating system, so that the water-based fluorocarbon resin with high fluorine content in the top coating is required to have excellent weather resistance and self-cleaning property, and the requirement on fluorine content is higher, so that the water-based fluorocarbon resin with high fluorine content in the top coating is preferably higher than that of the water-based fluorocarbon resin of the intermediate coating.
As a preferred embodiment, the curing agentIs at least one of modified toluene diisocyanate curing agent, modified diphenylmethane diisocyanate curing agent and modified isophorone diisocyanate curing agent. These curing agents are commercially available products, and as the modified tolylene diisocyanate based curing agent, water-based curing agent XL600 of Cor may be selected. The modified diphenylmethane diisocyanate curing agent can be selected from a water-based curing agent CN-4 of Shandong Huacheng. The modified isophorone diisocyanate can be selected from aqueous curing agent 2655 of Bayer company.
As a preferred embodiment, the auxiliary agent includes at least one of a dispersant, a preservative, an antifoaming agent, a neutralizing agent, a thixotropic agent, a leveling agent, a thickener, a film-forming agent, an ultraviolet absorber, an antioxidant, and a wetting agent.
As a further preferred embodiment, the dispersant is at least one of an anionic dispersant, a cationic dispersant and a nonionic dispersant. These dispersants are all commercially available products, and as the anionic dispersant, the wet dispersant Disperbx 080 manufactured by Samson chemical may be selected. The cationic dispersant can be selected from water-based dispersant 1124 of Convolvulus chemical industry of Guangzhou city. The non-ionic dispersant can be selected from a bisk chemical dispersant BYK 192.
As a further preferable mode, the preservative is at least one of isothiazolinone preservatives and benzimidazole preservatives. These preservatives are commercially available products, and as the isothiazolinone preservative, the kasong preservative Biocare CBA (K-100) of shanghai baijie chemical may be selected. As the benzimidazole preservative, a coating mildew preventive 3Q-302A in Ningwei chemistry can be selected.
As a further preferable mode, the defoaming agent is at least one of a mineral oil type defoaming agent and a polysiloxane type defoaming agent. These defoamers are commercially available products, and for example, the mineral oil defoamer XST-7001 of the Simstetech can be selected. As the silicone-based defoaming agent, a defoaming agent 810 produced by Digao can be selected.
As a further preferred embodiment, the neutralizing agent is an ammonia neutralizing agent. The ammoniacal neutralizing agent may be chosen from the hamming neutralizing agents DMAE.
As a further preferred embodiment, the thixotropic agent is at least one of a fumed silica type thixotropic agent and a bentonite type thixotropic agent. These thixotropic agents are all commercially available products, and as said fumed silica type thixotropic agent, fumed silica HDK T40 from Wake's chemical Germany can be selected. As said bentonite type thixotropic agent, we can choose the water-based paint thickener thixotropic agent BENTONE LT, which is the heumami.
As a further preferable embodiment, the leveling agent is at least one of an acrylic leveling agent, an organic silicon leveling agent and a fluorocarbon leveling agent. These leveling agents are all commercially available products, and for example, the acrylic leveling agent may be chosen from the polyacrylate leveling agent Crayvallac A-2678-M of Achima. As the organic silicon leveling agent, a hamming agent SLIP-AYD FS444 can be selected. If the fluorocarbon leveling agent is Dongguan, a fluorocarbon leveling agent AK-3040 in Chengbang chemical industry can be selected.
As a further preferable mode, the thickener is at least one of a modified alkali swelling thickener and a polyurethane modified polyether thickener. These thickeners are all commercially available products, and for example, the modified alkali swelling thickener may be selected from C-872 of Federal fine chemical engineering in the Guangdong. As the polyurethane modified polyether thickener, a thickener SN660T in Nopock can be selected.
As a further preferable mode, the film forming agent is at least one of a dodecyl alcohol ester and ethylene glycol monobutyl ether.
As a further preferable mode, the ultraviolet absorbent is at least one of benzotriazole ultraviolet absorbent and salicylate ultraviolet absorbent. These ultraviolet absorbers are all commercially available products, and for example, the ultraviolet absorber UV-1130 of italon can be selected as the benzotriazole ultraviolet absorber. For example, the salicylate ultraviolet absorbent can be ultraviolet absorbent UV-9 from the chemical industry of golden bear in the city of Longkou.
As a further preferred embodiment, the antioxidant is a phenolic antioxidant. The phenolic antioxidant can be selected from phenolic antioxidant AT-10 of Santa Lactoferrite.
As a further preferred embodiment, the wetting agent is at least one of sodium alkyl naphthalene sulfonate, sodium dodecyl sulfonate and polyoxyethylene glycol alkyl ester.
As a preferred scheme, the color paste is at least one of iron oxide red color paste, iron oxide yellow color paste, titanium white color paste and carbon black color paste.
The invention also provides a preparation method of the water-based high-weather-resistance bare concrete protective coating system, which comprises the following steps:
1) base layer treatment: polishing and removing floating ash, sundries, oil stains and a release agent on the surface of the concrete, ensuring that a base layer is clean and flat, cleaning loose blocks at the defect positions of obvious edge gnawing and pot holes of the concrete, and then matching black and white cement for repairing and leveling, wherein the smaller the number and the parts of the repaired parts, the better;
2) and (3) constructing a bottom coating: after the coating main agent, the matched curing agent, the auxiliary agent and the like are uniformly mixed according to a proportion, the coating is sprayed once after the viscosity is adjusted by water, and the coating is rolled and coated once after the surface is dried;
3) intermediate coating construction: after the coating main agent, the matched curing agent, the auxiliary agent and the like are uniformly mixed according to a proportion, the viscosity is adjusted by water, and the construction is carried out twice by a roller or a brush;
4) construction of the toning coating: after the coating main agent, the matched curing agent, the auxiliary agent and the like are uniformly mixed according to a proportion, construction is carried out by using a spray gun, a small amount of construction is needed for multiple times, a small amount of repaired parts are needed, and a large amount of repaired parts are needed, so that the whole is consistent;
5) surface coating construction: the coating main agent, the matched curing agent, the auxiliary agent and the like are uniformly mixed according to a proportion, the viscosity is adjusted by water, and the construction is carried out twice by using a roller or a brush.
6) The construction site test items and methods are shown in table 1.
TABLE 1 Job site test project and method
Serial number
Inspection item
Technical requirements
Basis of examination
1
System adhesion, MPa
Not less than 1.5, or cohesive failure of concrete
JT/T695 appendix B.3
2
Hardness of Chinese pencil
≥1H
HG/T 3829
3
Solvent resistance (butanone) next time
≥60
GB/T 23989
Compared with the prior art, the technical scheme of the invention has the following beneficial technical effects: the primer, the intermediate coating, the toning coating and the surface coating adopted by the water-based high-weather-resistance clear water concrete protective coating system are water-based two-component materials. The water-based system takes water as a solvent, is zero in VOC, green and environment-friendly, and is particularly suitable for urban bare concrete protection engineering; the two-component material is crosslinked into thermosetting resin by a curing agent, is crosslinked into a three-dimensional network structure, is insoluble and infusible, is obviously superior to the single-component material, has high crosslinking density and good cohesive strength, and can endow a protection system with excellent performances of high strength, good corrosion resistance and strong bonding force.
The bottom coating adopted by the water-based high-weather-resistance clear water concrete protective coating system is a water-based two-component epoxy coating, and the epoxy resin has the advantages of high strength, corrosion resistance, strong bonding force and the like, can well seal and isolate a concrete base layer, resists the corrosion action of concrete alkalinity on the coating system, and has strong adhesive force with concrete and intermediate coating. The intermediate coating is a transition layer, plays a role in starting and stopping between the bottom coating and the toning layer, and ensures the bonding strength of the system. The color-mixing coating plays a role in adjusting the color difference of the fair-faced concrete, ensures that the color difference between concretes poured in different batches is eliminated, and simultaneously keeps the appearance effects of the texture and the bulkiness of the fair-faced concrete. The top coating is water-based two-component fluorocarbon coating, the fluorine content in the base material is more than 20%, the coating is cured at normal temperature, the performance of the coating can be comparable to that of oil-based fluorocarbon coating, and the coating has high hardness, self-cleaning property, ultraviolet aging resistance and corrosion resistance. The four materials are preferably combined, so that the water-based high-weather-resistance fair-faced concrete protective coating system has excellent bonding performance, the bonding strength of the protective system is more than or equal to 2.5MPa or the protective system is cohesive failure of concrete, and the protective system does not peel or shell and fall off in the long-term use process; the super-fluorescent ultraviolet aging-resistant coating has excellent weather resistance, the super-fluorescent ultraviolet accelerated aging of a protection system is 1700h pulverization 0 grade, the weather aging resistance is good after long-term use, the effective protection time limit can reach 20 years, and the cost is saved in the service life cycle of a fair-faced concrete structure.
The base coating, the intermediate coating and the surface coating adopted by the water-based high-weather-resistance fair-faced concrete protective coating system are colorless transparent systems, have low glossiness, do not cover the original texture and texture of the fair-faced concrete, and simultaneously, the color of the adopted color mixing paint is consistent with the color of the on-site fair-faced concrete, so that the local defects can be effectively repaired, the overall appearance is unified, and the excellent appearance effect is provided for the fair-faced concrete together.
The construction method of the water-based high-weather-resistance clear water concrete protective coating system is simple, efficient and controllable in quality, creatively provides a feasible field construction method, can effectively control the quality of a construction field, and is beneficial to large-scale popularization and application of the clear water concrete protective coating system. The adhesive force of the coating system of the detection project is detected by the adhesive strength between each layer of the protection system and the concrete, and the adhesive strength is an important quality index for preventing the coating system from peeling and falling within the service life. The pencil hardness detection item is the hardness of a protection system and is an important quality index for resisting scratch and contamination within the service life. The detection project of solvent wiping resistance (butanone) detects the curing reaction condition and medium corrosion resistance of the protection system, and is an important quality index for resisting corrosion of various acid, alkali and salt corrosive media such as acid rain and the like within the service life. The three detection items are closely related to the use and construction of materials, and if the adverse behaviors such as material stealing and material reduction, machine operation and labor saving and the like exist, the field detection items cannot pass.
Detailed Description
The following examples further illustrate specific embodiments of the present invention, which are provided only to aid understanding of the invention and should not be construed as specifically limiting the invention. All insubstantial modifications and adaptations of the invention set forth above are intended to be within the scope of the claims.
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