Water tunnel concrete pipe anti-corrosion treatment method

Abstract

According to the water tunnel concrete pipe anti-corrosion treatment method, a permeation sealing layer can conduct permeation and sealing protection on the pipe wall of the water tunnel concrete pipe, and the binding force between the pipe wall of the water tunnel concrete pipe and a putty layer is increased. The putty layer can increase the smoothness of the pipe wall of the water tunnel concrete pipe and increase the binding force between the permeation sealing layer and the protection layer. The waterproof layer can improve the waterproof performance of the pipe wall of the water tunnel concrete pipe. The protective layer can improve the corrosion resistance and impact resistance of the pipe wall of the water tunnel concrete pipe. The reinforcing layer can improve the hardness and friction resistance of the pipe wall of the water tunnel concrete pipe. The surface layer can improve the corrosion resistance and scratch resistance of the pipe wall of the water tunnel concrete pipe. The water tunnel concrete pipe treated by the water tunnel concrete pipe anti-corrosion treatment method is excellent in waterproof performance, excellent in corrosion resistance, high in impact resistance, resistant to abrasion and long in service life.

Description

Technical Field

[0001] The invention relates to the field of concrete anti-corrosion, and in particular to an anti-corrosion treatment method for concrete pipes in a water conveyance tunnel. Background Art

[0002] The concrete corrosion process is complex and diverse, with many classification standards. It is divided into two categories according to the type of corrosive medium. The first category is inorganic corrosion: including acids, salts, and strong alkalis that react chemically with the components of concrete to produce non-gelling or expansive substances, which change the structural components of the concrete and thus cause concrete corrosion. The second category is organic and microbial corrosion: in the appropriate environment, microorganisms decompose and digest organic matter, releasing corrosive media such as organic acids, carbon dioxide, and hydrogen sulfide, which deteriorate the concrete. Concrete structures are generally considered to be corrosion-resistant in atmospheric environments, but in actual use, due to the influence of environmental factors, various forms of corrosion will occur. According to the corrosion mechanism, its corrosion forms can be divided into: physical action, chemical corrosion, and microbial corrosion. Concrete pipes in water tunnels have higher requirements for corrosion protection.

[0003] However, to improve the corrosion resistance of concrete, concrete needs to be treated with an anti-corrosion treatment. Traditional concrete anti-corrosion methods, such as the technical solution protected by patent application number CN201710098130.7, entitled "A Concrete Anti-corrosion Method," have poor waterproof performance. Summary of the Invention

[0004] Based on this, it is necessary to provide a water tunnel concrete pipe anti-corrosion treatment method to address the technical problem of poor waterproof performance of traditional concrete anti-corrosion methods.

[0005] A method for anti-corrosion treatment of a concrete pipe in a water conveyance tunnel, comprising the following steps: Grinding step: Grinding the pipe wall of the water tunnel concrete pipe; Cleaning steps: clean the impurities on the polished concrete pipe of the water tunnel; Bottom sealing step: coating the cleaned concrete pipe wall of the water tunnel with a penetration sealing coating to form a penetration sealing layer; Leveling step: Apply a layer of putty on the penetration sealing layer to form a putty layer to fill the pits on the concrete pipe wall of the water tunnel and increase the flatness of the concrete pipe wall of the water tunnel; Waterproofing step: Apply a layer of waterproof paint on the putty layer to form a waterproof layer; Protection step: Apply a layer of rubber paint on the waterproof layer to form a protective layer; Reinforcement step: apply a layer of epoxy flake putty on the protective layer to form a reinforcement layer; Surface sealing step: Apply a layer of protective topcoat on the reinforcement layer to form a surface layer.

[0006] In one embodiment, the penetration sealing coating is an epoxy penetration sealing primer.

[0007] In one embodiment, the thickness of the permeable sealing layer is 0.5 mm to 1 mm.

[0008] In one embodiment, the thickness of the permeable sealing layer is 0.8 mm.

[0009] In one embodiment, the thickness of the waterproof layer is 0.1 mm to 0.5 mm.

[0010] In one embodiment, the thickness of the waterproof layer is 0.4 mm.

[0011] In one embodiment, the surface layer has a thickness of 0.3 mm to 0.8 mm.

[0012] In one embodiment, the thickness of the protective layer is 0.7 mm to 1.5 mm.

[0013] In one embodiment, the thickness of the protective layer is 1.2 mm.

[0014] In one embodiment, the thickness of the reinforcement layer is 0.8 mm to 1.8 mm. The above-mentioned method for treating the corrosion of concrete pipes in a water conveyance tunnel is concise, exquisite, and easy to operate, and each step is carefully and meticulously carried out. The grinding step grinds the wall of the concrete pipe of the water conveyance tunnel and roughens the wall of the concrete pipe of the water conveyance tunnel. The cleaning step cleans impurities from the ground concrete pipe of the water conveyance tunnel. The bottom sealing step forms a permeable sealing layer on the wall of the concrete pipe of the water conveyance tunnel. The leveling step forms a putty layer on the permeable sealing layer, and fills the pits on the wall of the concrete pipe of the water conveyance tunnel, thereby increasing the flatness of the wall of the concrete pipe of the water conveyance tunnel. The waterproofing step forms a waterproof layer on the putty layer, the protecting step forms a protective layer on the waterproof layer, the reinforcing step forms a reinforcing layer on the protective layer, and the surface layer forms a surface layer on the reinforcing layer. The permeable sealing layer can penetrate and seal the wall of the concrete pipe of the water conveyance tunnel, thereby increasing the bonding strength between the wall of the concrete pipe of the water conveyance tunnel and the putty layer. The putty layer can increase the smoothness of the concrete pipe wall of the water tunnel and strengthen the bonding strength between the permeable sealing layer and the protective layer. The waterproof layer can enhance the waterproof performance of the concrete pipe wall of the water tunnel. The protective layer can enhance the corrosion and impact resistance of the concrete pipe wall of the water tunnel. The reinforcement layer can increase the hardness and friction resistance of the concrete pipe wall of the water tunnel. The surface layer can enhance the corrosion and scratch resistance of the concrete pipe wall of the water tunnel. The concrete pipes treated with the above-mentioned anti-corrosion treatment method for water tunnel concrete pipes have excellent waterproofing performance, excellent corrosion resistance, strong impact resistance, wear resistance, and a long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The figure is a flow chart of a method for anti-corrosion treatment of concrete pipes in a water delivery tunnel according to one embodiment. DETAILED DESCRIPTION

[0016] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below. In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" etc. is based on the orientation or position relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0017] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0018] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0019] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0020] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0021] See also Figure 1 The present invention provides a method for anti-corrosion treatment of concrete pipes in a water conveyance tunnel, the method comprising the following steps: Step 101: Grinding step: Grinding the pipe wall of the water tunnel concrete pipe.

[0022] Specifically, the pipe wall of the concrete pipe of the water conveyance tunnel is ground by a grinding machine.

[0023] Step 102: Cleaning step: clean the impurities on the polished concrete pipe of the water tunnel.

[0024] Specifically, the dust, foreign matter and impurity particles on the polished concrete pipe of the water tunnel are cleaned.

[0025] Step 103: Bottom layer sealing step: coating the cleaned pipe wall of the water tunnel concrete pipe with a penetration sealing coating to form a penetration sealing layer.

[0026] In this embodiment, the penetrating sealing coating is an epoxy penetrating sealing primer.

[0027] Specifically, a permeable sealing coating is applied to the cleaned concrete pipe wall of the water tunnel to form a permeable sealing layer. The epoxy permeable sealing primer has excellent permeability and sealing properties to the concrete pipe wall of the water tunnel, while also increasing adhesion to the concrete pipe wall. In this embodiment, the permeable sealing layer has a thickness of 0.5 mm to 1 mm. Furthermore, the permeable sealing layer has a thickness of 0.8 mm.

[0028] Step 104: Leveling step: A layer of putty is applied on the penetration sealing layer to form a putty layer to fill the pits on the wall of the concrete pipe of the water tunnel and increase the flatness of the wall of the concrete pipe of the water tunnel.

[0029] Specifically, a layer of putty is applied to the permeable sealing layer to form a putty layer, which fills the pits on the concrete pipe wall of the water tunnel and increases the smoothness of the concrete pipe wall of the water tunnel. The putty layer can also increase the bonding strength between the permeable sealing layer and the protective layer.

[0030] Step 105: Waterproofing step: Apply a layer of waterproof paint on the putty layer to form a waterproof layer.

[0031] Specifically, a layer of waterproof paint is applied over the putty layer to form a waterproof layer. This waterproof layer can enhance the waterproofing performance of the concrete pipe wall of the water tunnel. In this embodiment, the thickness of the waterproof layer is 0.1 mm to 0.5 mm. Specifically, the thickness of the waterproof layer is 0.4 mm.

[0032] Step 106: Protection step: Apply a layer of rubber paint on the waterproof layer to form a protective layer.

[0033] Specifically, a layer of rubber paint is applied to the waterproof layer to form a protective layer. This protective layer can enhance the corrosion and impact resistance of the concrete pipe wall of the water tunnel. In this embodiment, the thickness of the protective layer is 0.7 mm to 1.5 mm. Specifically, the thickness of the protective layer is 1.2 mm.

[0034] Step 107: Reinforcement step: Apply a layer of epoxy flake putty on the protective layer to form a reinforcement layer.

[0035] Specifically, a layer of epoxy flake mortar is applied over the protective layer to form a reinforcement layer. This reinforcement layer increases the hardness and friction resistance of the concrete pipe wall of the water tunnel. In this embodiment, the thickness of the reinforcement layer is 0.8 mm to 1.8 mm, and more specifically, the thickness is 1.5 mm. Step 108: Surface layer sealing step: Apply a layer of protective topcoat on the reinforcement layer to form a surface layer.

[0036] Specifically, a protective topcoat is applied to the reinforcement layer to form a surface layer. This surface layer enhances the corrosion and scratch resistance of the concrete pipe wall of the water tunnel. In this embodiment, the surface layer has a thickness of 0.3 mm to 0.8 mm, and more specifically, a thickness of 0.5 mm.

[0037] The above-mentioned method for treating the corrosion of concrete pipes in a water conveyance tunnel is concise, exquisite, and easy to operate, and each step is carefully and meticulously carried out. The grinding step grinds the wall of the concrete pipe of the water conveyance tunnel and roughens the wall of the concrete pipe of the water conveyance tunnel. The cleaning step cleans impurities from the ground concrete pipe of the water conveyance tunnel. The bottom sealing step forms a permeable sealing layer on the wall of the concrete pipe of the water conveyance tunnel. The leveling step forms a putty layer on the permeable sealing layer, and fills the pits on the wall of the concrete pipe of the water conveyance tunnel, thereby increasing the flatness of the wall of the concrete pipe of the water conveyance tunnel. The waterproofing step forms a waterproof layer on the putty layer, the protecting step forms a protective layer on the waterproof layer, the reinforcing step forms a reinforcing layer on the protective layer, and the surface layer forms a surface layer on the reinforcing layer. The permeable sealing layer can penetrate and seal the wall of the concrete pipe of the water conveyance tunnel, thereby increasing the bonding strength between the wall of the concrete pipe of the water conveyance tunnel and the putty layer. The putty layer can increase the smoothness of the concrete pipe wall of the water tunnel and strengthen the bonding strength between the permeable sealing layer and the protective layer. The waterproof layer can enhance the waterproof performance of the concrete pipe wall of the water tunnel. The protective layer can enhance the corrosion and impact resistance of the concrete pipe wall of the water tunnel. The reinforcement layer can increase the hardness and friction resistance of the concrete pipe wall of the water tunnel. The surface layer can enhance the corrosion and scratch resistance of the concrete pipe wall of the water tunnel. The concrete pipes treated with the above-mentioned anti-corrosion treatment method for water tunnel concrete pipes have excellent waterproofing performance, excellent corrosion resistance, strong impact resistance, wear resistance, and a long service life.

[0038] The corrosion resistance of the concrete pipes in the water supply tunnel treated with the above-mentioned anti-corrosion treatment method was tested. (The corrosion resistance test and electric flux test were conducted in accordance with GB / T749-2008 "Test Method for Sulfate Resistance of Cement" and GB / T50082-2009 "Standard for Test Methods for Long-term Performance and Durability of Ordinary Concrete.") The average test results are shown in the following table:

[0039] The concrete pipes of the water supply tunnel treated with the above anti-corrosion treatment method were subjected to freeze-thaw cycle and soak-bake cycle tests (testing was conducted in accordance with GB / T50082-2009 "Standard for Test Methods for Long-term Performance and Durability of Ordinary Concrete"). The average test results are shown in the following table:

[0040] To enhance the waterproof and anti-leakage properties of concrete pipe walls in water supply tunnels, in one embodiment, the waterproof paint comprises the following components in parts by weight: 30 to 60 parts acrylate acrylic copolymer emulsion, 4 to 8 parts polyvinyl alcohol, 5 to 10 parts deionized water, 10 to 20 parts triethoxysilane, 1 to 3 parts sodium dibutyl succinate sulfonate, 1 to 2 parts tributyl phosphate, 3 to 6 parts dimethyl silicone oil, 5 to 15 parts mica powder, 3 to 6 parts kaolin, 4 to 8 parts silica powder, 0.5 to 1 part ethyl acetate, 0.2 to 0.5 parts ethylene glycol ester, and 0.05 to 0.2 parts n-butanol. The waterproof paint composed of the above components can effectively enhance the waterproof and anti-leakage properties of concrete pipe walls in water supply tunnels.

[0041] To enhance the corrosion resistance, impact resistance, and waterproofing of concrete pipes in water tunnels, the rubber paint comprises the following components in parts by weight: 30 to 45 parts chlorinated rubber, 10 to 30 parts hydroxylated acrylic resin, 10 to 20 parts butyl acetate, 10 to 20 parts butanone, 5 to 15 parts titanium dioxide, 1 to 2 parts octanoate, 0.5 to 1.2 parts sodium sulfite, and 0.1 to 0.2 parts polypropylene glycol. This rubber paint enhances the corrosion resistance, impact resistance, and waterproofing of concrete pipes in water tunnels.

[0042] To increase the hardness and friction resistance of concrete pipe walls in water tunnels, the epoxy flake mortar includes the following components by weight: 25 to 40 parts epoxy resin, 5 to 10 parts polystyrene resin, 5 to 15 parts glass flakes, 10 to 20 parts polyamide, 6 to 14 parts talc, 4 to 8 parts fumed silica, 2 to 4 parts polyethylene wax, 10 to 24 parts n-butanol, 1 to 2 parts butyl acrylate, 0.5 to 1.2 parts acrylic acid, and 0.1 to 0.2 parts phosphate ester. The epoxy flake mortar, consisting of the above components, can increase the hardness and friction resistance of concrete pipe walls in water tunnels.

[0043] To enhance the corrosion resistance, scratch resistance, and waterproofing of concrete pipes in water tunnels, the protective topcoat comprises the following components in parts by weight: 10 to 20 parts alkyd resin, 20 to 40 parts aliphatic polyisocyanate, 5 to 10 parts epoxy acrylate, 5 to 20 parts hexamethylene diisocyanate, 2 to 4 parts polycarbodiimide, 5 to 10 parts kaolin, 4 to 8 parts silica powder, 2 to 5 parts feldspar powder, 0.02 to 0.04 parts 2,6-di-tert-butyl-p-cresol, 0.1 to 0.2 parts silicone defoamer, 0.5 to 1 parts sodium polycarboxylate, and 0.4 to 0.8 parts tricresyl phosphate. This protective topcoat enhances the corrosion resistance, scratch resistance, and waterproofing of concrete pipes in water tunnels.

[0044] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0045] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A method for anti-corrosion treatment of concrete pipes in a water tunnel, characterized in that: The process comprises the following steps: Grinding step: Grinding the pipe wall of the water tunnel concrete pipe; Cleaning steps: clean the impurities on the polished concrete pipe of the water tunnel; Bottom sealing step: coating the cleaned concrete pipe wall of the water tunnel with a penetration sealing coating to form a penetration sealing layer; Leveling step: Apply a layer of putty on the penetration sealing layer to form a putty layer to fill the pits on the concrete pipe wall of the water tunnel and increase the flatness of the concrete pipe wall of the water tunnel; Waterproofing step: Apply a layer of waterproof paint on the putty layer to form a waterproof layer; Protection step: Apply a layer of rubber paint on the waterproof layer to form a protective layer; Reinforcement step: apply a layer of epoxy flake putty on the protective layer to form a reinforcement layer; Surface sealing step: Apply a layer of protective topcoat on the reinforcement layer to form a surface layer.

2. The process according to claim 1, characterized in that The penetrating sealing coating is an epoxy penetrating sealing primer.

3. The process according to claim 2, characterized in that The thickness of the permeable sealing layer is 0.5 mm to 1 mm.

4. The process according to claim 3, characterized in that The thickness of the permeable sealing layer is 0.8 mm.

5. The process according to claim 1, characterized in that The thickness of the waterproof layer is 0.1 mm to 0.5 mm.

6. The process according to claim 5, characterized in that The thickness of the waterproof layer is 0.4 mm.

7. The process according to claim 1, characterized in that The thickness of the surface layer is 0.3 mm to 0.8 mm.

8. The process according to claim 1, characterized in that The thickness of the protective layer is 0.7 mm to 1.5 mm.

9. The process according to claim 8, characterized in that The thickness of the protective layer is 1.2 mm.

10. The process according to claim 1, characterized in that The thickness of the reinforcement layer is 0.8 mm to 1.8 mm.

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