Concrete anti-seepage and anti-seepage treatment methods

Abstract

The present application relates to a concrete anti-seepage and anti-seepage treatment method of concrete treatment technology, comprising: cleaning the concrete surface; preparing a lubricating solution, applying the lubricating solution evenly to the cleaned concrete surface, and placing it in a ventilated environment for ventilation; preparing an epoxy resin adhesive, applying the epoxy resin adhesive to the concrete surface after the lubricating solution is applied and ventilated, and standing and curing until the epoxy resin adhesive solidifies to form a dense epoxy resin adhesive layer. The concrete anti-seepage and anti-seepage treatment method of the present application can effectively seal micro-cracks and holes in the surface area of ​​the concrete, isolate the concrete surface from the outside world, enhance the repair effect of the concrete surface, improve the anti-seepage and anti-seepage properties of the concrete, and is suitable for concrete structure anti-seepage treatment and water leakage repair in various occasions.

Description

Technical Field

[0001] The present application relates to the technical field of concrete treatment, and in particular to a method for treating concrete seepage and resistance to seepage. Background Art

[0002] Water leakage is a common problem in underground structures. In current underground structure projects, due to loose or missing construction vibration, honeycombs and holes are often generated inside the concrete, forming interconnected water seepage channels, which in turn cause large-scale water leakage. In addition, the discontinuous construction joints in the structure will also seriously affect the anti-seepage ability of the concrete structure, causing the environment inside the underground building to deteriorate, the durability of the structure to decrease, and even endanger the safety of personnel, equipment, and vehicles. The causes of water leakage in underground structures are complex, and the control technology is difficult, with many processes and high requirements. It has always been a heavy and difficult problem in operation and maintenance.

[0003] The conventional method is to use waterproofing membranes and waterproofing coatings for anti-seepage treatment. In the case of frequent municipal pipeline ruptures during the rainy season, the groundwater will generate a large water pressure, which will cause the adhesion between the waterproofing membrane and the concrete interface to fail, fall off, and lose the waterproof and anti-seepage effect. Although the use of waterproofing coatings can form a membrane structure on the outer surface of the building to isolate water penetration, it does not have a good repair effect on "discontinuous construction joints". Therefore, seeking a coating material and technology that can not only solve the problem of waterproofing and anti-seepage, but also effectively repair cracks is undoubtedly a problem that needs to be solved urgently.

[0004] In addition, patent application CN116102311A provides a surface-penetrating waterproof coating. This cement-based penetrating crystalline waterproof coating has very high requirements on the concrete surface, the surface treatment is time-consuming and labor-intensive, and the waterproof ability is also unsatisfactory; patent application CN115433505A provides a modified epoxy resin waterproof coating composition, a modified epoxy resin waterproof coating and its preparation method and application, which focuses on bonding with waterproof membranes and ignores the bonding performance with concrete, and the construction is complicated and has many processes; patent application CN117264528A provides a one-component polyurethane waterproof coating and its preparation method and structure. Although the construction is efficient, the cost is high and the emission of volatile organic compounds (VOC) is large. Summary of the invention

[0005] In view of the problems existing in the background technology, the present application provides a method for concrete anti-seepage and anti-seepage treatment, which can effectively seal the construction joints, microcracks and holes in the surface area of ​​​​the concrete, isolate the surface of the concrete from the outside world, enhance the repair effect of the surface of the concrete, and improve the anti-seepage and anti-seepage properties of the concrete.

[0006] According to one aspect of the present invention, there is provided a method for treating concrete seepage and resistance to seepage, comprising: cleaning the concrete surface; preparing a lubricating solution, applying the lubricating solution evenly to the cleaned concrete surface, and placing the concrete surface in a ventilated environment for ventilation; preparing an epoxy resin adhesive, applying the epoxy resin adhesive to the concrete surface after the lubricating solution is applied and the concrete surface is ventilated, and curing the epoxy resin adhesive until the epoxy resin adhesive is cured to form a dense epoxy resin adhesive layer.

[0007] In some embodiments of the present invention, the lubricating solution includes an acetone solution and epoxy resin A glue.

[0008] In some embodiments of the present invention, in the lubricating solution, the acetone solution accounts for 40-60% and the epoxy resin A glue accounts for 60-40% by volume.

[0009] In some embodiments of the present invention, in the acetone solution, by mass fraction, acetone ≥ 99.5%, methanol ≤ 0.05%, ethanol ≤ 0.05%, water ≤ 0.3%, and the boiling point of the acetone solution is 56 ± 1 °C.

[0010] In some embodiments of the present invention, the lubricating solution is evenly applied on the concrete surface more than twice.

[0011] In some embodiments of the present invention, the epoxy resin glue includes epoxy resin A glue and curing agent B glue.

[0012] In some embodiments of the present invention, in the epoxy resin glue, the epoxy resin A glue contains 18-22 parts and the curing agent B glue contains 8-12 parts by weight.

[0013] In some embodiments of the present invention, the density of the epoxy resin adhesive layer is 1.05-1.30 / cm 3 , tensile strength ≥30MPa, elastic modulus ≥1500MPa, elongation ≥1.5%, flexural strength ≥40MPa, compressive strength ≥70MPa.

[0014] In some embodiments of the present invention, the cleaning of the concrete surface comprises: firstly, using a fan to clean the floating dust and debris on the concrete surface; then using a brush to apply anhydrous ethanol to the concrete surface, and letting it stand until the anhydrous ethanol evaporates.

[0015] In some embodiments of the present invention, in the anhydrous ethanol, by mass fraction, ethanol ≥ 99.7%, methanol ≤ 0.05%, isopropanol ≤ 0.01%, and water ≤ 0.3%.

[0016] Compared with the prior art, the present invention achieves the following technical effects:

[0017] 1. The concrete anti-seepage and anti-seepage treatment method of the present invention has good anti-seepage and anti-seepage effects, realizes effective leak plugging and waterproofing in underground structure projects, improves the anti-seepage performance of underground structures, ensures the durability of underground structures, prevents the deterioration of the environment inside underground buildings, and ensures the smooth operation of underground buildings.

[0018] 2. The treatment method of the present invention is convenient to construct, has few steps, can be constructed over a large area, and is easy to construct and widely used.

[0019] 3. The thickness of the concrete changes little after being treated by the treatment method of the present invention, and will not affect its deadweight or design scheme.

[0020] 4. The treatment method of the present invention allows the epoxy resin layer to penetrate into the concrete pores after the surface is cured, so that the concrete has better durability and adaptability in complex environments, and has excellent long-term waterproof ability.

[0021] 5. The treatment method of the present invention optimizes the interfacial bonding between the resin and the concrete after treatment. The epoxy resin adhesive layer can change along with the creep of the concrete without a large number of micro cracks, thereby further enhancing its long-term waterproofing ability. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0023] Figure 1 It is a process diagram of the concrete anti-seepage and anti-seepage treatment method of the present invention;

[0024] Figure 2 This is a partial enlarged schematic diagram of the concrete surface to be treated;

[0025] Figure 3 A partial enlarged schematic diagram after surface cleaning and removal of floating dust and debris;

[0026] Figure 4 A partial enlarged schematic diagram showing the surface treatment after the lubricating solution is applied and the acetone is completely evaporated;

[0027] Figure 5 A partial enlarged schematic diagram of applying epoxy resin glue for surface curing and curing;

[0028] Figure 6 The present invention is a flow chart of the concrete anti-seepage and anti-seepage treatment method.

[0029] The reference numerals in the accompanying drawings represent the following: 1. Holes; 2. Micro cracks; 3. Construction joints; 4. Floating dust and debris; 5. Epoxy resin A glue; 6. Epoxy resin glue layer. DETAILED DESCRIPTION

[0030] It should be clear that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0031] When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Instead, they are only examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims.

[0032] In the description of the present application, it should be understood that the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances. In addition, in the description of the present application, unless otherwise specified, "multiple" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the objects associated before and after are in an "or" relationship.

[0033] The concrete anti-seepage and anti-seepage treatment method provided in the embodiments of the present application is described below with reference to the accompanying drawings.

[0034] The present application embodiment discloses a method for treating concrete seepage and impermeability. Figure 2 As shown, the concrete has defects such as holes 1, micro cracks 2, and construction joints 3, and there are floating dust and debris 4 in the holes 1, micro cracks 2, and construction joints 3.

[0035] like Figure 1 As shown, the concrete anti-seepage and anti-seepage treatment method includes the following steps:

[0036] First, clean the concrete surface.

[0037] Then prepare a lubricating solution, apply it evenly to the cleaned concrete surface, and place it in a ventilated environment for ventilation.

[0038] Then, epoxy resin adhesive is prepared, and the epoxy resin adhesive is applied to the concrete surface after the lubricating solution is applied and ventilated, and the epoxy resin adhesive is allowed to stand and cure until the epoxy resin adhesive is solidified to form a dense epoxy resin adhesive layer.

[0039] By using the concrete anti-seepage and anti-seepage treatment method in the technical solution, using the idea of ​​improving the resin diffusion effect, the concrete surface is pre-treated with a lubricating solution, and then the epoxy resin glue is applied so that it can better diffuse into the cracks and pores inside the concrete, such as holes 1, microcracks 2 and construction joints 3, etc. After the epoxy resin glue is cured, a dense and waterproof epoxy resin glue layer will be formed on the concrete surface, which can isolate the concrete surface from the outside world and effectively fill the microcracks and holes in the concrete surface area, thereby improving the concrete's anti-seepage property and solving the problem of water leakage in existing underground structures.

[0040] In some embodiments of the present invention, the cleaning of the concrete surface comprises the following steps:

[0041] First, use a fan to clean the floating dust and debris on the concrete surface. Figure 3 shown.

[0042] Then use a brush to apply anhydrous ethanol to the concrete surface and let it stand until the anhydrous ethanol evaporates to further clean the concrete surface.

[0043] Furthermore, in anhydrous ethanol, by mass fraction, ethanol ≥ 99.7%, methanol ≤ 0.05%, isopropanol ≤ 0.01%, and water ≤ 0.3%.

[0044] Furthermore, the fan includes but is not limited to an electric spray bottle, a blower, a hair dryer or a vacuum fan, and the like, and is not limited here as long as it can remove floating dust and debris on the concrete surface.

[0045] In some embodiments of the present invention, the lubricating solution includes acetone and epoxy resin A glue.

[0046] Mixing epoxy resin A glue with acetone solution forms a lubricating solution, which can easily penetrate into the surface of various materials, especially concrete, and can enhance the affinity between epoxy resin and concrete and enhance its repair effect on the surface of materials.

[0047] Furthermore, in the lubricating solution, by volume percentage, the acetone solution accounts for 40-60%, and the epoxy resin A glue accounts for 60-40%.

[0048] Specifically, in the acetone solution in this embodiment, by mass fraction, acetone ≥ 99.5%, methanol ≤ 0.05%, ethanol ≤ 0.05%, water ≤ 0.3%, and the boiling point of the acetone solution is 56±1°C.

[0049] Specifically, the epoxy resin A glue in this embodiment is white or slightly yellow, and its components, by weight, include: 50-70 parts of bisphenol A epoxy resin, 30-50 parts of bisphenol F epoxy resin, 1-15 parts of alkylphenol polyoxyethylene ether, 3-4 parts of o-cresyl glycidyl ether, 6-10 parts of propylene oxide phenyl ether, 8-10 parts of liquid polysulfide rubber toughening agent, 5-8 parts of terminal carboxyl liquid nitrile rubber toughening agent, and 35-40 parts of active silicon powder.

[0050] Furthermore, the lubricating solution is evenly applied to the concrete surface in equal amounts, and the lubricating solution is applied to the concrete surface more than twice to completely wet the cracks, pores, construction joints, etc. on the concrete surface.

[0051] Furthermore, after the lubricating solution is evenly applied to the concrete surface, it is placed in a ventilated environment for a ventilation time of not less than half an hour to allow the acetone to completely evaporate, and the remaining epoxy resin A glue solution 5, such as Figure 4 shown.

[0052] In some embodiments of the present invention, the epoxy resin glue includes epoxy resin A glue and curing agent B glue.

[0053] Furthermore, in the epoxy resin glue, by weight, the epoxy resin A glue comprises 18-22 parts and the curing agent B glue comprises 8-12 parts.

[0054] Specifically, the epoxy resin A glue in this embodiment is white or slightly yellow, and its components, by weight, include: 50-70 parts of bisphenol A epoxy resin, 30-50 parts of bisphenol F epoxy resin, 1-15 parts of alkylphenol polyoxyethylene ether, 3-4 parts of o-cresyl glycidyl ether, 6-10 parts of propylene oxide phenyl ether, 8-10 parts of liquid polysulfide rubber toughening agent, 5-8 parts of terminal carboxyl liquid nitrile rubber toughening agent, and 35-40 parts of active silicon powder.

[0055] Curing agent B glue is brown or light brown, and its components, by weight, include: 5-25 parts of polyetheramine curing agent, 50-70 parts of polyamide curing agent, 15-30 parts of diethyltoluenediamine, 3-3.5 parts of DMP-30 tertiary amine accelerator, 1-15 parts of alkylphenol polyoxyethylene ether, 3-4 parts of KH-550 aminopropyl triethoxy silane, 20-25 parts of active silicon powder, and 16-20 parts of active calcium carbonate.

[0056] Furthermore, when applying epoxy resin glue to the concrete surface, it is necessary to ensure that the epoxy resin glue completely fills the pores, cracks and construction joints. Figure 5 shown.

[0057] In some embodiments of the present invention, after the epoxy resin glue is cured, the density of the epoxy resin glue layer formed is 1.05-1.30 / cm3 , tensile strength ≥ 30MPa, elastic modulus ≥ 1500MPa, elongation ≥ 1.5%, flexural strength ≥ 40MPa, and no brittle failure, compressive strength ≥ 70MPa, in line with the technical index requirements of the "Concrete Structure Reinforcement Design Code" GB50367-2011 standard, the epoxy resin adhesive layer has good anti-seepage and waterproof effects, wear resistance and weather resistance.

[0058] In some embodiments of the present invention, when preparing the lubricating solution or epoxy resin glue, the mixture can be uniformly mixed by mechanical stirring.

[0059] Furthermore, the lubricating solution may be stirred at a maximum speed of 600 rpm for about 2 minutes, and the epoxy resin glue solution needs to be fully stirred for about 10 minutes.

[0060] Specifically, the lubricating solution in this embodiment needs to be stirred into a colorless and transparent liquid before use.

[0061] In some embodiments of the present invention, when applying anhydrous ethanol, lubricating solution or epoxy resin glue, a brush, a scraper or other application tools can be used to achieve uniform application to ensure that cracks, holes, construction joints and other special parts of the concrete structure are completely filled. In addition, anhydrous ethanol can also be sprayed on the concrete surface through an electric spray bottle.

[0062] The concrete anti-seepage and anti-seepage treatment method in the present application will be further described below in conjunction with specific embodiments.

[0063] Example 1

[0064] The test specimen is a C30P8 standard anti-seepage specimen (the concrete strength grade is C30 and the anti-seepage grade is P8). The specimen meets the requirements of the national standard GB50164-2011 concrete quality control standard and is treated 7 days before the curing time. The concrete anti-seepage and anti-seepage treatment methods are as follows: Figure 6 As shown, the following steps are included:

[0065] S1: Surface cleaning.

[0066] Since there are some floating dust and debris on the surface of the specimen, such as Figure 2 As shown, it is necessary to use an electric spray bottle or other equipment to blow air to clean the concrete surface to be treated; then use an electric spray bottle to apply anhydrous ethanol with a mass fraction of ≥ 99.7% to the treated surface, apply it at least twice, and let it stand until it completely evaporates, such as Figure 3 shown.

[0067] Anhydrous ethanol, ethanol mass fraction ≥ 99.7%, methanol ≤ 0.05%, isopropanol ≤ 0.01%, water ≤ 0.3%.

[0068] S2: Prepare lubricating solution.

[0069] 40% volume fraction of epoxy resin A glue and 60% volume fraction of acetone solution are mixed to prepare a lubricating solution; it needs to be fully stirred into a colorless and transparent liquid, and the deposited epoxy resin A glue can only be used after it is completely dissolved. At the same time, the solution is highly volatile and needs to be used as soon as possible after preparation.

[0070] Acetone solution, acetone content ≥ 99.5%, boiling point 56 ± 1 ° C, methanol ≤ 0.05%, ethanol ≤ 0.05%, water ≤ 0.3%. Epoxy resin A glue is white or slightly yellow, and its components are calculated by weight: 60 parts of bisphenol A epoxy resin, 40 parts of bisphenol F epoxy resin, 8 parts of alkylphenol polyoxyethylene ether, 3 parts of o-cresyl glycidyl ether, 8 parts of propylene oxide phenyl ether, 9 parts of liquid polysulfide rubber toughening agent, 6 parts of terminal carboxyl liquid nitrile rubber toughening agent, and 37 parts of active silicon powder.

[0071] S3: Surface treatment.

[0072] Use a brush to evenly apply the mixed lubricating solution to the surface of the concrete impermeability test piece in equal amounts, at least twice, and focus on the holes on the surface. Then place it in a ventilated environment for at least half an hour. After the acetone is completely evaporated, proceed to the next step, such as Figure 4 shown.

[0073] S4: Surface curing.

[0074] Epoxy resin glue is prepared by mixing 20 parts by weight of epoxy resin A glue and 10 parts by weight of curing agent B glue. It needs to be fully stirred for about 10 minutes, applied to the surface of the concrete anti-permeability test piece, and ensure that the pores and cracks are completely filled. It is left to stand and cured until it solidifies to form a cured epoxy resin glue layer. Figure 5 shown.

[0075] Epoxy resin A glue is white or slightly yellow, and its components, by weight, include: 60 parts of bisphenol A epoxy resin, 40 parts of bisphenol F epoxy resin, 8 parts of alkylphenol polyoxyethylene ether, 3 parts of o-cresyl glycidyl ether, 8 parts of propylene oxide phenyl ether, 9 parts of liquid polysulfide rubber toughening agent, 6 parts of terminal carboxyl liquid nitrile rubber toughening agent, and 37 parts of active silica powder.

[0076] The curing agent B glue is brown or light brown, and its components, by weight, include: 15 parts of polyetheramine curing agent, 60 parts of polyamide curing agent, 23 parts of diethyltoluenediamine, 3 parts of DMP-30 tertiary amine accelerator, 7 parts of alkylphenol polyoxyethylene ether, 3 parts of KH-550 aminopropyl triethoxy silane, 22 parts of active silicon micropowder, and 18 parts of active calcium carbonate.

[0077] The above-mentioned cured epoxy resin adhesive layer has a density of about 1.05~1.30 / cm 3 , tensile strength ≥ 30MPa, elastic modulus ≥ 1500MPa, elongation ≥ 1.5%, flexural strength ≥ 40MPa, and no brittle failure, compressive strength ≥ 70MPa, which meets the technical index requirements of the "Concrete Structure Reinforcement Design Code" GB50367-2011 standard.

[0078] Example 2

[0079] The test specimen is a C30P8 standard anti-seepage specimen (the concrete strength grade is C30 and the anti-seepage grade is P8). The specimen meets the requirements of the national standard GB50164-2011 concrete quality control standard. It is treated 7 days before the curing time. The concrete anti-seepage and anti-seepage treatment method includes the following steps:

[0080] S1: Surface cleaning.

[0081] Since there is a certain amount of floating dust and debris on the surface of the specimen, it is necessary to use an electric spray bottle or other equipment to blow air to clean the concrete surface to be treated; then use an electric spray bottle to apply anhydrous ethanol with a mass fraction of ≥99.7% to the treated surface, apply it at least twice, and let it stand until it completely evaporates.

[0082] Anhydrous ethanol, ethanol mass fraction ≥ 99.7%, methanol ≤ 0.05%, isopropanol ≤ 0.01%, water ≤ 0.3%.

[0083] S2: Prepare lubricating solution.

[0084] A lubricating solution is prepared by mixing 50% volume fraction of epoxy resin A glue and 50% volume fraction of acetone solution; it needs to be fully stirred into a colorless and transparent liquid, and the deposited epoxy resin A glue can only be used after it is completely dissolved. At the same time, the solution is highly volatile and needs to be used as soon as possible after preparation.

[0085] Acetone solution, acetone content ≥ 99.5%, boiling point 56 ± 1 ° C, methanol ≤ 0.05%, ethanol ≤ 0.05%, water ≤ 0.3%. Epoxy resin A glue is white or slightly yellow, and its components are calculated by weight: 60 parts of bisphenol A epoxy resin, 40 parts of bisphenol F epoxy resin, 8 parts of alkylphenol polyoxyethylene ether, 3 parts of o-cresyl glycidyl ether, 8 parts of propylene oxide phenyl ether, 9 parts of liquid polysulfide rubber toughening agent, 6 parts of terminal carboxyl liquid nitrile rubber toughening agent, and 37 parts of active silicon powder.

[0086] S3: Surface treatment.

[0087] Use a brush to evenly apply an equal amount of the mixed lubricating solution to the surface of the concrete waterproof test piece. Apply it at least twice, focusing on the holes on the surface. Then place it in a ventilated environment for at least half an hour. After the acetone has completely evaporated, proceed to the next step.

[0088] S4: Surface curing.

[0089] The epoxy resin glue is made by mixing 20 parts by weight of epoxy resin A glue and 10 parts by weight of curing agent B glue. It needs to be fully stirred for about 10 minutes and applied to the surface of the concrete waterproof test piece to ensure that the pores and cracks are completely filled. It is then left to stand and cured until it solidifies to form a cured epoxy resin glue layer.

[0090] Epoxy resin A glue is white or slightly yellow, and its components, by weight, include: 60 parts of bisphenol A epoxy resin, 40 parts of bisphenol F epoxy resin, 8 parts of alkylphenol polyoxyethylene ether, 3 parts of o-cresyl glycidyl ether, 8 parts of propylene oxide phenyl ether, 9 parts of liquid polysulfide rubber toughening agent, 6 parts of terminal carboxyl liquid nitrile rubber toughening agent, and 37 parts of active silica powder.

[0091] The curing agent B glue is brown or light brown, and its components, by weight, include: 15 parts of polyetheramine curing agent, 60 parts of polyamide curing agent, 23 parts of diethyltoluenediamine, 3 parts of DMP-30 tertiary amine accelerator, 7 parts of alkylphenol polyoxyethylene ether, 3 parts of KH-550 aminopropyl triethoxy silane, 22 parts of active silicon micropowder, and 18 parts of active calcium carbonate.

[0092] The above-mentioned cured epoxy resin adhesive layer has a density of about 1.05~1.30 / cm 3 , tensile strength ≥ 30MPa, elastic modulus ≥ 1500MPa, elongation ≥ 1.5%, flexural strength ≥ 40MPa, and no brittle failure, compressive strength ≥ 70MPa, which meets the technical index requirements of the "Concrete Structure Reinforcement Design Code" GB50367-2011 standard.

[0093] Example 3

[0094] The test specimen is a C30P8 standard anti-seepage specimen (the concrete strength grade is C30 and the anti-seepage grade is P8). The specimen meets the requirements of the national standard GB50164-2011 concrete quality control standard. It is treated 7 days before the curing time. The concrete anti-seepage and anti-seepage treatment method includes the following steps:

[0095] S1: Surface cleaning.

[0096] Since there is a certain amount of floating dust and debris on the surface of the specimen, it is necessary to use an electric spray bottle or other equipment to blow air to clean the concrete surface to be treated; then use an electric spray bottle to apply anhydrous ethanol with a mass fraction of ≥99.7% to the treated surface, apply it at least twice, and let it stand until it completely evaporates.

[0097] Anhydrous ethanol, ethanol mass fraction ≥ 99.7%, methanol ≤ 0.05%, isopropanol ≤ 0.01%, water ≤ 0.3%.

[0098] S2: Prepare lubricating solution.

[0099] A lubricating solution is prepared by mixing 60% volume fraction of epoxy resin A glue and 40% volume fraction of acetone solution; it needs to be fully stirred into a colorless and transparent liquid, and the deposited epoxy resin A glue can only be used after it is completely dissolved. At the same time, the solution is highly volatile and needs to be used as soon as possible after preparation.

[0100] Acetone solution, acetone content ≥ 99.5%, boiling point 56 ± 1 ° C, methanol ≤ 0.05%, ethanol ≤ 0.05%, water ≤ 0.3%. Epoxy resin A glue is white or slightly yellow, and its components are calculated by weight: 60 parts of bisphenol A epoxy resin, 40 parts of bisphenol F epoxy resin, 8 parts of alkylphenol polyoxyethylene ether, 3 parts of o-cresyl glycidyl ether, 8 parts of propylene oxide phenyl ether, 9 parts of liquid polysulfide rubber toughening agent, 6 parts of terminal carboxyl liquid nitrile rubber toughening agent, and 37 parts of active silicon powder.

[0101] S3: Surface treatment.

[0102] Use a brush to evenly apply an equal amount of the mixed lubricating solution to the surface of the concrete waterproof test piece. Apply it at least twice, focusing on the holes on the surface. Then place it in a ventilated environment for at least half an hour. After the acetone has completely evaporated, proceed to the next step.

[0103] S4: Surface curing.

[0104] The epoxy resin glue is made by mixing 20 parts by weight of epoxy resin A glue and 10 parts by weight of curing agent B glue. It needs to be fully stirred for about 10 minutes and applied to the surface of the concrete waterproof test piece to ensure that the pores and cracks are completely filled. It is then left to stand and cured until it solidifies to form a cured epoxy resin glue layer.

[0105] Epoxy resin A glue is white or slightly yellow, and its components, by weight, include: 60 parts of bisphenol A epoxy resin, 40 parts of bisphenol F epoxy resin, 8 parts of alkylphenol polyoxyethylene ether, 3 parts of o-cresyl glycidyl ether, 8 parts of propylene oxide phenyl ether, 9 parts of liquid polysulfide rubber toughening agent, 6 parts of terminal carboxyl liquid nitrile rubber toughening agent, and 37 parts of active silica powder.

[0106] The curing agent B glue is brown or light brown, and its components, by weight, include: 15 parts of polyetheramine curing agent, 60 parts of polyamide curing agent, 23 parts of diethyltoluenediamine, 3 parts of DMP-30 tertiary amine accelerator, 7 parts of alkylphenol polyoxyethylene ether, 3 parts of KH-550 aminopropyl triethoxy silane, 22 parts of active silicon micropowder, and 18 parts of active calcium carbonate.

[0107] The above-mentioned cured epoxy resin adhesive layer has a density of about 1.05~1.30 / cm 3 , tensile strength ≥ 30MPa, elastic modulus ≥ 1500MPa, elongation ≥ 1.5%, flexural strength ≥ 40MPa, and no brittle failure, compressive strength ≥ 70MPa, which meets the technical index requirements of the "Concrete Structure Reinforcement Design Code" GB50367-2011 standard.

[0108] Comparative Example 1

[0109] The test specimen is a C30P8 standard anti-permeability specimen, which meets the requirements of the national standard GB50164-2011 concrete quality control standard.

[0110] Comparative Example 2

[0111] The test specimen is a C30P8 standard anti-permeability specimen, which meets the requirements of the national standard GB50164-2011 concrete quality control standard, and is treated with epoxy resin 7 days before the curing time, including the following steps:

[0112] Step 1:

[0113] Surface cleaning: Use an electric spray bottle or other equipment to blow air to clean the concrete surface to be treated; then use a brush to apply anhydrous ethanol with a mass fraction of ≥99.7% to the treated surface, apply it at least twice, and let it stand until it evaporates completely.

[0114] Step 2:

[0115] Surface curing: 20 parts by weight of epoxy resin A glue and 10 parts by weight of curing agent B glue are mixed to form epoxy resin glue. It needs to be fully stirred for about 10 minutes and applied to the surface of the concrete waterproof test piece to ensure that the pores and cracks are completely filled. It is then left to stand and cured until it solidifies to form a cured epoxy resin.

[0116] The above-mentioned anhydrous ethanol has an ethanol mass fraction of ≥99.7%, methanol ≤0.05%, isopropanol ≤0.01%, and water ≤0.3%.

[0117] Epoxy resin A glue is white or slightly yellow, and its components, by weight, include: 60 parts of bisphenol A epoxy resin, 40 parts of bisphenol F epoxy resin, 8 parts of alkylphenol polyoxyethylene ether, 3 parts of o-cresyl glycidyl ether, 8 parts of propylene oxide phenyl ether, 9 parts of liquid polysulfide rubber toughening agent, 6 parts of terminal carboxyl liquid nitrile rubber toughening agent, and 37 parts of active silica powder.

[0118] The curing agent B glue is brown or light brown, and its components, by weight, include: 15 parts of polyetheramine curing agent, 60 parts of polyamide curing agent, 23 parts of diethyltoluenediamine, 3 parts of DMP-30 tertiary amine accelerator, 7 parts of alkylphenol polyoxyethylene ether, 3 parts of KH-550 aminopropyl triethoxy silane, 22 parts of active silicon micropowder, and 18 parts of active calcium carbonate.

[0119] The above-mentioned cured epoxy resin has a density of about 1.05~1.30 / cm 3 , tensile strength ≥ 30MPa, elastic modulus ≥ 1500MPa, elongation ≥ 1.5%, flexural strength ≥ 40MPa, and no brittle failure, compressive strength ≥ 70MPa, in line with the technical index requirements of the "Concrete Structure Reinforcement Design Code" GB50367-2011 standard.

[0120] Comparative Example 3

[0121] Oriental Yuhong cement-based penetrating crystallization waterproof coating (PCC-501), the coating powder and water are mixed in a mass ratio of 1:0.35.

[0122] The test specimen is a C30P8 standard anti-permeability specimen, which meets the requirements of the national standard GB50164-2011 concrete quality control standard.

[0123] Comparative Example 4

[0124] Patent application CN117264528A is a one-component polyurethane waterproof coating, which is composed of the following raw material components calculated by weight: DL-2000D, 100 weight parts; EP330N, 55 weight parts; SOLTER T-920A, 16 weight parts; trioctyl phosphate, 124 weight parts; butyl acetate, 18 weight parts; talcum powder, 70 weight parts; heavy calcium, 135 weight parts; toluene diisocyanate, 36 weight parts; end-capping agent A, 12 weight parts; defoamer, 1.8 weight parts; dispersant, 0.3 weight parts; stannous octoate, 0.6 weight parts. It is prepared according to the patent requirements.

[0125] The test specimen is a C30P8 standard anti-permeability specimen, which meets the requirements of the national standard GB50164-2011 concrete quality control standard.

[0126] Comparative Example 5

[0127] Patent application CN115433505A discloses a modified epoxy resin waterproof coating composition, a modified epoxy resin waterproof coating, and a preparation method and application thereof. 100 parts by weight of modified bisphenol A epoxy resin T1 are stirred with 8 parts by weight of polypropylene glycol diglycidyl ether and 0.8 parts by weight of a defoamer for 30 minutes to obtain an epoxy adhesive; and then stirred with 24 parts by weight of a cardanol epoxy curing agent for 5 minutes.

[0128] The test specimen is a C30P8 standard anti-permeability specimen, which meets the requirements of the national standard GB50164-2011 concrete quality control standard.

[0129] After the test pieces of Examples 1 to 3 and Comparative Examples 1 to 5 were cured for 28 days, the anti-seepage grade of the test pieces was tested:

[0130] Table 1 Test results of the impermeability grade of concrete using different anti-seepage treatment methods and untreated concrete

[0131]

[0132] It can be seen from the test results that the anti-seepage performance of the anti-seepage treatment method of the present invention is significantly improved.

[0133] In summary, the anti-seepage treatment method for improving the diffusion effect of resin has excellent anti-seepage and waterproof effects, good weather resistance and wear resistance, and can have long-term waterproof capabilities in complex environments; the present invention can not only prevent water leakage caused by concrete seepage channels, but also plug leaks and waterproof discontinuous construction joints; after pretreatment, the affinity between concrete and epoxy resin is enhanced, the diffusion effect is enhanced, and the epoxy resin can better penetrate into the interior of the concrete, thereby achieving the effect of improving the anti-seepage performance of the concrete while reinforcing the cracks; since the smearing operation is adopted, the construction is convenient; the epoxy resin adhesive layer can change with the creep of the concrete, and a large number of microcracks will not appear, and it has good long-term working potential.

[0134] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A method for treating concrete seepage and impermeability, characterized in that: include: Clean the concrete surface; Prepare the lubricating solution, apply it evenly to the cleaned concrete surface, and place it in a ventilated environment for ventilation; The lubricating solution is composed of an acetone solution and an epoxy resin A glue solution. In the lubricating solution, the acetone solution accounts for 40-60% by volume, and the epoxy resin A glue solution accounts for 60-40% by volume. The lubricating solution is evenly applied on the concrete surface for more than two times; Prepare epoxy resin adhesive, apply the epoxy resin adhesive to the concrete surface that has been coated with lubricating solution and ventilated, and let it stand and cure until the epoxy resin adhesive is solidified to form a dense epoxy resin adhesive layer.

2. The method for treating concrete seepage prevention and anti-seepage according to claim 1, characterized in that: In the acetone solution, by mass fraction, acetone ≥ 99.5%, methanol ≤ 0.05%, ethanol ≤ 0.05%, water ≤ 0.3%, and the boiling point of the acetone solution is 56±1°C.

3. The method for treating concrete seepage prevention and anti-seepage according to claim 1, characterized in that: The epoxy resin glue comprises epoxy resin A glue and curing agent B glue.

4. The method for treating concrete seepage prevention and anti-seepage according to claim 3, characterized in that: In the epoxy resin glue, the epoxy resin A glue contains 18-22 parts and the curing agent B glue contains 8-12 parts by weight.

5. The concrete anti-seepage and anti-seepage treatment method according to claim 4, characterized in that: The density of the epoxy resin adhesive layer is 1.05-1.30 g / cm 3 , tensile strength ≥30MPa, elastic modulus ≥1500MPa, elongation ≥1.5%, flexural strength ≥40MPa, compressive strength ≥70MPa.

6. The method for treating concrete seepage prevention and anti-seepage according to claim 1, characterized in that: The cleaning of the concrete surface includes: First, use a fan to clean the floating dust and debris on the concrete surface; Then use a brush to apply anhydrous ethanol to the concrete surface and let it stand until the anhydrous ethanol evaporates.

7. The method for treating concrete seepage prevention and anti-seepage according to claim 6, characterized in that: In the anhydrous ethanol, by mass fraction, ethanol ≥ 99.7%, methanol ≤ 0.05%, isopropanol ≤ 0.01%, and water ≤ 0.3%.

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