CN216005725U - Reinforced concrete surface anticorrosion fireproof composite coating structure - Google Patents
Reinforced concrete surface anticorrosion fireproof composite coating structure Download PDFInfo
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- CN216005725U CN216005725U CN202023233617.8U CN202023233617U CN216005725U CN 216005725 U CN216005725 U CN 216005725U CN 202023233617 U CN202023233617 U CN 202023233617U CN 216005725 U CN216005725 U CN 216005725U
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Abstract
The utility model discloses a reinforced concrete surface anticorrosion fireproof composite coating structure, which comprises the following components in sequence from the surface of a reinforced concrete substrate to the outside: a seal coat, a zinc-rich paint coat, a fire-retardant paint coat, and a top coat. The sealing coating is preferably formed by penetrating solvent-type butyl triethoxysilane or octyl triethoxysilane or water-based paste-type butyl triethoxysilane or octyl triethoxysilane into the surface of the reinforced concrete building matrix to a depth of 0.5-3 mm. According to the utility model, after the surface of the concrete matrix is sealed and strengthened, the zinc-rich coating is adopted to improve the anticorrosion effect and durability of the reinforced concrete matrix, and the zinc-rich coating and the fireproof coating form optimized compounding, so that the structural reliability and durability of the anticorrosion fireproof composite coating of the reinforced concrete structure are obviously improved, and long-acting anticorrosion fireproof effect on the whole reinforced concrete structure can be formed.
Description
Technical Field
The utility model relates to an anticorrosion and fireproof technology for a building structure, belongs to the technical field of building engineering, and particularly relates to an anticorrosion and fireproof composite coating structure for a reinforced concrete surface.
Background
In order to improve the fire resistance of the building engineering and provide time for people in the building to escape or rescue, the building structure is generally designed for fire protection. The concrete structure fireproof coating (GB 28375 and 2012) of China makes detailed requirements for the coating. At present, the common reinforced concrete building can not be subjected to additional fire protection depending on the self fire resistance of concrete, but the surfaces of special reinforced concrete building structures such as fire dikes, tunnels and the like are required to be subjected to fire protection. The fireproof coating for the concrete structure is a fireproof coating which is coated on the surfaces of concrete in industrial and civil buildings or roads, railways (including subways) tunnels and the like and can form a fireproof heat-insulating protective layer so as to improve the fire resistance limit of the structure. With the development of social economy and the living needs of people, high-rise buildings are emerging continuously, and the fireproof design requirements are also improved continuously. In order to improve the fire-proof capability of public reinforced concrete building engineering, the surface of a reinforced concrete structure (such as a column, a beam, a firewall and the like) is protected by a fire-proof coating, so that the fire-proof limit under the fire disaster condition is improved, and the fire-fighting design requirements of engineering and the danger-avoiding and escaping requirements of people are met.
The most widely and economically efficient method for engineering application is to apply the fireproof paint on the inner wall surface. However, the tunnel fireproof coating is found to have poor performance in daily tunnel operation, and is easy to drop, fall off and the like, so that the fireproof performance is greatly reduced, and great potential safety hazards are caused to the tunnel operation.
The reason for this is that since concrete is a porous material, there are a large number of pores and micro channels inside, and it is easily corroded by various corrosive mediums in the actual use environment, resulting in the durability damage of concrete, such as: (1) corrosion by chlorine salt; (2) sulfate corrosion; (3) carbonizing concrete; (4) freeze thawing and destroying; (5) alkali aggregate reaction, and the like. Aiming at the problem of concrete aging corrosion, the current protective measures of the reinforced concrete engineering mainly comprise basic measures and additional measures, wherein the basic measures comprise concrete raw material optimization and mixing proportion, reinforced design, construction process control and the like, and the common additional measures comprise a cathode protection technology, a sheath coating technology, a paint coating technology and the like. The coating technology is widely applied due to the economic and efficient design and convenient and fast operation. However, when the reinforced concrete matrix is not protected in place, the reinforced concrete is easy to have aging damage conditions such as carbonization, alkali-aggregate reaction, freeze thawing and the like, so that the coating joint surface is damaged and falls off, and the fireproof coating falls off and even the fireproof system fails.
The existing research shows that when the anticorrosive coating and the fireproof coating are two coatings with different properties (such as water-based zinc-rich coating-solvent-based fireproof coating, or epoxy zinc-rich primer-water-based fireproof coating), the interface condition is very complex, the water-based paint and the paint can not be used simultaneously, although the water-based paint or the paint can be used after being completely dried, the water-based paint or the paint can be coated with a sealing primer to avoid the reaction between the water-based paint and the paint, so that the adhesion between the coatings is poor, and the problems of bubbling, peeling and even falling off of the surface coating can be caused quickly after the engineering use.
The existing concrete structure fireproof paint is similar to steel structure fireproof paint, but has different performance requirements, and because the paint is applied to the surface of concrete with alkalinity, the paint is required to have good alkalinity resistance or is coated with alkali-resistant sealing primer in advance when in use;
CN201610744624.3 discloses a construction method of a tunnel fireproof coating, which comprises the following steps: tunnel structure surface cleaning, spraying fire protection coating, wire net setting, flattening, spout the fire protection paint, tunnel structure surface cleaning includes: removing false skin, empty shell and burrs on the surface of the secondary tunnel lining, filling up construction joints, and washing oil dirt, mud and dust on the surface of the secondary tunnel lining; when the thickness of the fireproof coating is 1/4 of the total thickness by brushing, arranging expansion screws, and then laying a steel wire mesh from top to bottom; when the fireproof coating reaches the designed thickness, 1-2 times of scraping by using waterproof putty, drying and polishing until the surface is flat; and finally, spraying the selected fireproof colored paint on the leveling surface. Through the treatment, the problem of falling off is solved by the fireproof coating, but the construction cost is greatly improved, and the building matrix is greatly damaged.
CN201821907231.0 discloses a high bright fluorescence tunnel fire protection coating structure, from inside to outside includes, the tunnel fire protection coating basic unit of thick type high adhesion, the tunnel fire protection coating intermediate level of thick type, ultra-thin high bright fluorescence tunnel fire protection coating finish paint layer, the tunnel fire protection coating basic unit of thick type high adhesion prefers the thick type fire protection coating of high viscosity high adhesion, and thickness is 2 ~ 6mm, and the tunnel fire protection coating intermediate level of thick type adopts quick-drying medium viscosity fire protection coating, makes the intermediate level can dry fast. The technology is similar to the prior conventional technology, the temporary combination is improved, the surface durability problem of the concrete substrate is not solved, the application time is long, after the surface of the concrete structure is aged, the combination of the fireproof coating base layer and the substrate is reduced, and the fireproof coating still can peel off, fall off and lose efficacy.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
Aiming at the problems in the prior art, the utility model designs an anticorrosion fireproof composite coating structure for the surface of reinforced concrete, which is used for sealing and strengthening the surface of a concrete matrix, adopts a zinc-rich coating to improve the anticorrosion effect of the reinforced concrete matrix, is combined with a fireproof coating to form optimized compounding, improves the reliability and durability of the anticorrosion fireproof composite coating structure of the reinforced concrete structure, and forms long-acting anticorrosion fireproof on the whole reinforced concrete structure.
(II) technical scheme
In order to achieve the purpose, the utility model is realized by the following technical scheme: the utility model provides a reinforced concrete surface anticorrosion fire prevention composite coating structure which characterized in that: outwards include in proper order by reinforced concrete matrix surface: a seal coat, a zinc-rich paint coat, a fire-retardant paint coat, and a top coat. The sealing coating is preferably formed by penetrating solvent-type butyl triethoxysilane or octyl triethoxysilane or water-based paste-type butyl triethoxysilane or octyl triethoxysilane into the surface of the reinforced concrete building matrix to a depth of 0.5-3 mm.
Preferably, the seal coat can also be formed by penetrating an epoxy primer or a water-based epoxy primer into the surface of the reinforced concrete building matrix to a depth of 0.1-1mm, and the thickness of the seal coat is 30-50 mu m.
Preferably, the zinc-rich paint coating is an epoxy zinc-rich primer or a water-based epoxy zinc-rich paint, and the thickness of the zinc-rich paint coating is 40-80 mu m.
Preferably, the fireproof coating is preferably a coating structure formed by a thin or ultra-thin fireproof coating, and the thickness of the fireproof coating is 0.5mm-10 mm.
Preferably, the finish coating is an indoor finish coating or a weather-resistant finish coating, and the thickness of the coating is 60-90 mu m.
Preferably, the sealing coating is formed by penetrating waterborne pasty butyl triethoxysilane or octyl triethoxysilane into the surface of the reinforced concrete building matrix for 0.5-3mm, the sealing coating can be formed by coating epoxy primer, epoxy sealing paint, nano modified epoxy sealing paint and the like on the cleaned reinforced concrete surface and soaking for 0.1-1mm, the reserved thickness is 30-50 mu m, and the sealing coating can also be formed by preferably penetrating solvent-based butyl triethoxysilane or octyl triethoxysilane or waterborne pasty butyl triethoxysilane or octyl triethoxysilane into the surface of the reinforced concrete building matrix for 0.5-3 mm.
Preferably, the zinc-rich paint coating is formed by coating a water-based epoxy zinc-rich paint on the seal coating, and the thickness of the zinc-rich paint coating is 60-80 μm; the fireproof coating is formed by coating a waterborne intumescent fireproof coating on a zinc-rich coating for 2 times, the thickness of the fireproof coating is 6mm-8mm, the fireproof coating can be a coating structure formed by a thin or ultrathin fireproof coating, and the thickness of the fireproof coating is 0.5mm-10 mm. The coating structure formed by the water-based thin or ultrathin fireproof coating can be further optimized, and the thickness of the fireproof coating is 0.5mm-10 mm.
Preferably, the finish coat is formed by coating 2 times of an aqueous polyurethane finish on the fireproof paint coat, the thickness of the finish coat is 60-80 mu m, the finish coat is preferably an indoor finish coat or a weather-resistant finish coat, and the thickness of the finish coat is 60-90 mu m, and further preferably an aqueous indoor finish coat or an aqueous weather-resistant finish coat, and the thickness of the coat is 60-90 mu m.
Preferably, the reinforced concrete matrix structure comprises a tunnel, a fire bank, a pier column, a beam frame and a building.
(III) advantageous effects
According to the utility model, after the surface of the concrete matrix is sealed and strengthened, the zinc-rich coating is adopted to improve the anticorrosion effect and durability of the reinforced concrete matrix, and the zinc-rich coating and the fireproof coating form optimized compounding, so that the structural reliability and durability of the anticorrosion fireproof composite coating of the reinforced concrete structure are obviously improved, and long-acting anticorrosion fireproof effect on the whole reinforced concrete structure can be formed. The whole reinforced concrete surface anticorrosion fireproof composite coating structure completely adopts corresponding water-based paint, and the site operation is convenient and quick, green and environment-friendly, and realizes energy conservation and high efficiency.
The existing fireproof coating can be designed into a thin (3-7mm) and ultra-thin fireproof coating (1-3mm) structure to replace the traditional fireproof coating structure (7mm and 15mm), and the whole anticorrosive fireproof composite coating for the reinforced concrete building is simple and efficient in structural design and has good cost performance and social and economic benefits.
Drawings
FIG. 1 is a schematic structural view of the anticorrosive fireproof composite coating for reinforced concrete surface according to the present invention.
In the figure: 1. the coating comprises a reinforced concrete matrix, 2, a sealing coating, 3, a zinc-rich coating, 4, a fireproof coating and 5, and a finish coating.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
As shown in figure 1, the reinforced concrete surface anticorrosion fireproof composite coating structure sequentially comprises a reinforced concrete substrate 1, a sealing coating 2, a zinc-rich coating 3, a fireproof coating 4 and a finish coating 5 from top to bottom. Wherein, the surface of the reinforced concrete matrix 1 is cleaned and purified, no dust and oil stain exist, loose parts on the surface are thoroughly removed, and putty can be used for leveling when necessary;
the sealing coating 2 is formed by coating octyl triethoxysilane on the surface of the reinforced concrete matrix 1 and then penetrating the surface to a depth of 0.5-3 mm;
the zinc-rich coating 3 is formed by coating epoxy zinc-rich paint on the surface of the seal coating 2, and the thickness is 60-80 μm;
the fireproof coating layer 4 is made of thin fireproof coating with the thickness of 5-7mm and is formed by 2-3 coating steps;
the finish coat 5 is formed by coating 2 times on the surface of the fireproof coating 4 by adopting polyurethane finish, and the thickness of the finish coat is 60-80 mu m.
The octyl triethoxysilane, the epoxy zinc-rich paint primer, the thin fire-retardant coating and the polyurethane finish are all products in the prior art.
Example 2
As shown in figure 1, the reinforced concrete surface anticorrosion fireproof composite coating structure sequentially comprises a reinforced concrete substrate 1, a sealing coating 2, a zinc-rich coating 3, a fireproof coating 4 and a finish coating 5 from top to bottom. Wherein, the surface of the reinforced concrete matrix 1 is cleaned and purified, no dust and oil stain are produced, loose parts on the surface are thoroughly removed, and putty can be used for leveling when necessary;
the sealing coating 2 is formed by coating nano modified epoxy sealing paint on the surface of the reinforced concrete matrix 1 and then penetrating the surface to a depth of 0.1-1mm, and the thickness of the sealing coating 2 above the surface of the reinforced concrete matrix is 30-50 mu m;
the zinc-rich coating 3 is formed by coating epoxy zinc-rich paint on the surface of the seal coating 2, and the thickness is 40-60 mu m;
the fireproof coating layer 4 is made of an ultrathin fireproof coating with the thickness of 1-3mm and is formed by 2-3 coating steps;
the finish coat 5 is formed by coating 2 times on the surface of the fireproof coating 4 by adopting epoxy resin paint, and the thickness of the finish coat is 60-90 mu m.
The octyl triethoxysilane, the nano modified epoxy sealing paint, the epoxy zinc-rich paint, the ultrathin fireproof coating and the epoxy resin paint are all products in the prior art.
Example 3
An anticorrosion fireproof composite coating structure for a reinforced concrete surface comprises a reinforced concrete matrix 1, a sealing coating 2, a zinc-rich coating 3, a fireproof coating 4 and a finish coating 5.
The sealing coating 2 is formed by penetrating water-based pasty butyl triethoxysilane into the surface of the cleaned reinforced concrete matrix 1, and the infiltration depth is 0.5-3 mm;
the zinc-rich paint coating 3 is formed by coating water-based epoxy zinc-rich paint on the seal coating 2, and the thickness of the zinc-rich paint coating 3 is 60-80 mu m;
the fireproof coating 4 is formed by coating 2 times of water-based intumescent fireproof coating on the zinc-rich coating 3, and the thickness is 6mm-8 mm;
the finish coat 5 is formed by coating 2 times of waterborne polyurethane finish on the fireproof coating 4, and the thickness of the finish coat 5 is 60-80 mu m.
Table 1 shows the comparison between the embodiment of the present invention and the prior art, which shows that the present invention has good effect.
Table 1 comparative testing of the utility model with the prior art
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. The utility model provides a reinforced concrete surface anticorrosion fire prevention composite coating structure which characterized in that: including reinforced concrete base member (1), reinforced concrete base member (1) surface outwards includes in proper order: the coating comprises a sealing coating (2), a zinc-rich coating (3), a fireproof coating (4) and a finish coating (5), wherein the sealing coating (2) is preferably formed by penetrating solvent-type butyl triethoxysilane or octyl triethoxysilane or water-based paste-type butyl triethoxysilane or octyl triethoxysilane into the surface of the reinforced concrete building matrix (1) to a depth of 0.5-3 mm.
2. The reinforced concrete surface anticorrosion and fireproof composite coating structure of claim 1, wherein: the sealing coating (2) can also be formed by preferably penetrating an epoxy primer or a water-based epoxy primer into the surface of the reinforced concrete building matrix (1) to a depth of 0.1-1mm, and the thickness of the sealing coating (2) is 30-50 mu m.
3. The reinforced concrete surface anticorrosion and fireproof composite coating structure of claim 1, wherein: the zinc-rich paint coating (3) is preferably epoxy zinc-rich primer or water-based epoxy zinc-rich paint, and the thickness of the zinc-rich paint coating (3) is 40-80 mu m.
4. The reinforced concrete surface anticorrosion and fireproof composite coating structure of claim 1, wherein: the fireproof coating (4) is preferably a coating structure formed by thin or ultrathin fireproof coatings, and the thickness of the fireproof coating (4) is 0.5-10 mm.
5. The reinforced concrete surface anticorrosion and fireproof composite coating structure of claim 1, wherein: the finish coat (5) is preferably an indoor finish coat or a weather-resistant finish coat and has the thickness of 60-90 mu m.
6. The reinforced concrete surface anticorrosion and fireproof composite coating structure of claim 1, wherein: the sealing coating (2) is formed by penetrating aqueous pasty butyl triethoxysilane or octyl triethoxysilane into the surface of the reinforced concrete building matrix (1) to a depth of 0.5-3 mm.
7. The reinforced concrete surface anticorrosion and fireproof composite coating structure of claim 1, wherein: the zinc-rich paint coating (3) is formed by coating water-based epoxy zinc-rich paint on the seal coating (2), and the thickness of the zinc-rich paint coating (3) is 60-80 mu m; the fireproof coating (4) is formed by coating 2 times of water-based intumescent fireproof coating on the zinc-rich coating (3), and the thickness is 6-8 mm.
8. The reinforced concrete surface anticorrosion and fireproof composite coating structure of claim 1, wherein: the finish coat (5) is formed by coating 2 times of waterborne polyurethane finish on the fireproof coating (4), and the thickness of the finish coat (5) is 60-80 mu m.
9. The reinforced concrete surface anticorrosion and fireproof composite coating structure of claim 1, wherein: the reinforced concrete matrix (1) structure comprises a tunnel, a fire bank, a pier column, a beam frame and a building.
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| CN202023233617.8U CN216005725U (en) | 2020-12-29 | 2020-12-29 | Reinforced concrete surface anticorrosion fireproof composite coating structure |
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| CN202023233617.8U CN216005725U (en) | 2020-12-29 | 2020-12-29 | Reinforced concrete surface anticorrosion fireproof composite coating structure |
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