CN210656712U - Impact-resistant and wear-resistant concrete protective coating structure - Google Patents
Impact-resistant and wear-resistant concrete protective coating structure Download PDFInfo
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- CN210656712U CN210656712U CN201921305184.7U CN201921305184U CN210656712U CN 210656712 U CN210656712 U CN 210656712U CN 201921305184 U CN201921305184 U CN 201921305184U CN 210656712 U CN210656712 U CN 210656712U
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Abstract
The utility model discloses an anti wear-resisting concrete protection coating structure of dashing belongs to concrete protection technical field. Is formed by compounding four layers of structures, which are sequentially from inside to outside: the concrete base surface (1), the low-viscosity high-permeability interface layer (2), the tough sealing isolation middle coating (3) and the anti-impact wear-resistant protective layer (4). The protective coating structure can effectively seal and prevent water vapor on the inner wall from escaping, fundamentally solves the problems of low bonding strength and poor durability of bubbling and surface stripping of the existing coating, has excellent impact resistance, wear resistance and cavitation erosion resistance, and has the advantages of multiple protection such as water resistance, carbonization resistance, weather resistance, attractive appearance and the like.
Description
Technical Field
The utility model belongs to a concrete protection field relates to an anti wear-resisting concrete protective coating structure of dashing.
Background
The surface of a hydraulic drainage building is easy to be damaged by scouring and grinding of high-speed water flow and high-speed sand-containing water flow, the problem that the surface of the drainage building is easy to be damaged by scouring and grinding of the high-speed water flow and the high-speed sand-containing water flow is not well solved for many years, the safe operation of the building is influenced, a large amount of manpower, financial resources and material resources need to be consumed for reinforcing and repairing the drainage building every year, along with the vigorous development of water conservancy construction in China, the establishment of a high-water-head and high-flow high dam is concerned and paid more attention to the problem of the scouring and grinding damage of the high-speed sand-containing water flow on the surface.
The improvement of the impact resistance and the wear resistance of the concrete surface in the prior art is mainly solved from the following two aspects: (1) the application technology of high-performance and high-strength concrete is researched and solved by a 'hard-to-hard' method. (2) The protective coating adopting the novel organic polymer composite material solves the problem in a 'soft-to-hard' mode, and improves the impact wear and the cavitation damage of high-speed water flow or high-speed sand-containing water flow by the characteristics of high strength and high toughness of the polymer material. At present, epoxy resin modified paint is generally used as a protective coating, but although the coating formed by the epoxy paint has good adhesive property, the weather resistance and the aging resistance are poor, and the water resistance is insufficient, so that the long-term durability of the coating can not be solved.
At present, a large number of hydraulic engineering water release buildings need to be maintained, repaired and recoated, so that an anti-impact wear-resistant concrete protective coating structure is urgently needed in both new construction and well-established construction, the coating structure has the advantages of high bonding strength, high isolation shielding property, good durability and excellent anti-impact wear resistance, and no relevant report is found at present.
Disclosure of Invention
The utility model discloses the purpose is in order to realize the comprehensive protection on concrete surface, realizes "waterproof, seal, anti wear-resisting multiple three-dimensional guard action of dashing, provides a bonding strength good, isolation shielding nature high and anti impact wear resistance excellent concrete protective coating structure.
The technical scheme is as follows:
the anti-impact wear-resistant concrete protective coating structure is formed by compounding four layers of structures and sequentially comprises the following components from inside to outside: the concrete surface, the low-viscosity high-permeability bottom coating, the tough sealing isolation middle coating and the anti-impact wear-resistant protective layer.
The low-viscosity high-permeability bottom coating is formed by coating two-component modified epoxy resin, can penetrate into the concrete by about 0.1mm, and has a construction thickness of about 0.2 mm-0.3 mm.
The tough sealing isolation intermediate coating is formed by coating thixotropic modified epoxy resin, and the construction thickness is 0.5-1.5 mm.
The anti-impact wear-resistant protective layer is formed by coating a single-component aliphatic polyurea coating, the performance index reaches the II-type requirement in JC/T2435-2018, and the construction thickness is 1.0-2.0 mmm.
The main components of the glue used for the low-viscosity high-permeability bottom coating are bisphenol A epoxy resin and a cardanol aldehyde amine curing agent, namely resin I for short, the viscosity of the glue is low, the viscosity range is 400-600 mPa & s, so that the glue can permeate into concrete through capillary holes on the surface of the concrete, the strength of the cured coating is high, the toughness of the cured coating is good, the adhesion of the cured coating and a concrete base surface is good, and meanwhile, the local deformation of the concrete base surface can be resisted. The layer can be coated for 1-2 times, and the construction thickness is about 0.2 mm-0.3 mm.
The main component of the glue used by the tough sealing isolation middle coating is the same as that of the low-viscosity high-permeability base coating, and the viscosity range is 10000-25000 mPa & s. The coating has the advantages of high strength and toughness, excellent thixotropy, good adhesion with the base coat, integration with the base coat and good adhesion with the anti-impact wear-resistant protective layer. The coating has the effects of filling holes, leveling and plugging base surface pinholes, can reach the specified thickness by brushing once, and avoids the phenomena of hollowing and pinholes on the coating, thereby forming a smooth and continuous protective layer. The layer has good toughness, can resist local deformation of a concrete base surface, and further prevents the coating from cracking. The layer can be coated for 1-2 times, the thickness is not more than 2mm, the hole sealing and isolating effect is influenced by coating too thin, and the thickness is generally recommended to be 1.0-2.0 mm.
The glue used by the anti-impact wear-resistant protective layer is single-component aliphatic polyurea, called paint I for short, the tensile strength reaches more than 20MPa, the elongation rate reaches more than 200%, the surface smoothness and fullness are high, the color is adjustable, the high and low temperature resistance is good, the bonding force with ice is extremely weak, the aliphatic main chain structure ensures the good ultraviolet aging resistance, and meanwhile, the anti-impact wear-resistant protective layer has good waterproof, anti-carbonization and anti-aging properties. The thickness is generally 1.0-2.0 mm, and 2.0mm is recommended when the requirement on impact resistance and wear resistance is higher.
The utility model discloses the advantage: the protective coating structure can effectively seal pores on the surface of concrete, prevent water vapor on the inner wall of the insulation layer from escaping, fundamentally solve the problems of low bonding strength and poor durability of bubbling and surface stripping of the existing coating, and the like, has excellent impact resistance, wear resistance and cavitation erosion resistance, and has multiple protection advantages of water resistance, carbonization resistance, freezing and ice-pulling resistance, weather resistance, attractiveness and the like. Can be well used in the fields of maintenance, repair and recoating of hydraulic outlet buildings.
Drawings
FIG. 1 is a schematic structural diagram of the present invention, wherein, 1-concrete substrate, 2-low-viscosity high-permeability bottom coat, 3-toughness sealing isolation middle coat, and 4-impact-resistant wear-resistant protective layer.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
example 1
Anti wear-resisting concrete protective coating structure of dashing is formed by the four-layer structure is compound, be concrete base face (1), low high infiltration layer under coat (2), toughness seal isolation intercoat (3) and anti wear-resisting inoxidizing coating (4) of dashing from inside to outside in proper order.
Wherein the low-viscosity high-permeability base coat (2) is formed by coating bisphenol A epoxy resin and a cardanol aldehyde amine curing agent, and the viscosity range is 400-600 mPa & s. The glue can penetrate into the concrete by 0.1mm, and the thickness of the coating is about 0.3 mm; the tough sealing isolation intermediate coating (3) is formed by coating thixotropic modified epoxy resin, and the viscosity of the tough sealing isolation intermediate coating ranges from 10000 mPa s to 25000mPa s. The thickness of the coating is 0.5-1.5 mm. The anti-impact wear-resistant protective layer (4) is formed by coating a single-component aliphatic polyurea coating, the performance index reaches the II-type requirement in JC/T2435-2018, and the thickness is 1.0-2.0 mmm.
The preparation process of the coating comprises the following specific steps:
1. polishing and finishing floating ash, oil stains and insecure attachments on the surface of the concrete;
2. brushing a low-viscosity high-permeability bottom coating glue on the clean concrete surface for 1-2 times, wherein the penetration depth is about 0.1mm, and the construction thickness is about 0.3 mm;
3. and (3) directly coating a tough sealing isolation intermediate coating after the surface is dried in the step (2), and brushing for 1-2 times, wherein the construction thickness is 0.5-1.5 mm.
4. And (3) after the surface is dried in the step (3), blade-coating the single-component aliphatic polyurea coating, wherein the thickness is 1.0-2.0 mmm. The optimal performance can be achieved after natural curing for 7 days, and the anti-impact wear-resistant concrete protective coating is formed.
Through practical detection, the bonding strength test result of the structure is that the base material is damaged at 4.2MPa, the Shore A hardness reaches 91, and the wear resistance (750 g, 500 r)/mg is 3. In addition, the water resistance, the aging resistance and the appearance plumpness are all superior to the prior art.
Claims (2)
1. The utility model provides an anti-impact wear-resistant concrete protective coating structure which characterized in that is formed by four-layer structure complex, is from inside to outside in proper order: the concrete base surface (1), the low-viscosity high-permeability bottom coating (2), the tough sealing isolation middle coating (3) and the anti-impact wear-resistant protective layer (4);
the low-viscosity high-permeability bottom coating is formed by coating a resin I with the viscosity range of 400-600 mPa & s;
the tough sealing isolation middle coating is formed by coating resin I with the viscosity range of 10000-25000 mPa & s;
the anti-impact wear-resistant protective layer is formed by coating paint I.
2. The impact-resistant wear-resistant concrete protective coating structure according to claim 1, wherein the thickness of the low-viscosity high-permeability interface layer is 0.2mm to 0.3 mm; the thickness of the coating in the tough sealing isolation is 1.0-2.0 mm; the thickness of the anti-impact wear-resistant protective layer is 1.0-2.0 mmm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921305184.7U CN210656712U (en) | 2019-08-13 | 2019-08-13 | Impact-resistant and wear-resistant concrete protective coating structure |
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| CN201921305184.7U CN210656712U (en) | 2019-08-13 | 2019-08-13 | Impact-resistant and wear-resistant concrete protective coating structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116813379A (en) * | 2023-06-29 | 2023-09-29 | 吉林亚泰建筑工程有限公司 | Concrete curing method |
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2019
- 2019-08-13 CN CN201921305184.7U patent/CN210656712U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116813379A (en) * | 2023-06-29 | 2023-09-29 | 吉林亚泰建筑工程有限公司 | Concrete curing method |
| CN116813379B (en) * | 2023-06-29 | 2023-12-15 | 吉林亚泰建筑工程有限公司 | Concrete curing method |
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