Concrete water-based inorganic compacting agent and concrete wall efflorescence radical treatment method

Abstract

The invention provides a concrete water-based inorganic compacting agent and a concrete wall efflorescence radical treatment method. The concrete water-based inorganic compacting agent is prepared from the following raw materials: 18 to 28 parts of sodium silicate liquid, 0.25 to 0.5 part of alkane sulfonate ionic surfactant, 0.5 to 2.5 parts of calcium oxide, 0 to 2 parts of ethylenediamine tetraacetic acid, 0.05 to 0.2 part of sodium hydrogen sulfite, 4 to 6 parts of nano zinc oxide, 0.1 to 0.3 part of potassium chloride, 0.1 to 0.5 part of silane, 53 to 72 parts of deionized water, 1 to 3 parts of polyoxyethylene fatty alcohol ether and 3 to 5 parts of magnesium fluosilicate. The concrete water-based inorganic compacting agent is sprayed through a specific construction process, the concrete structure can be compacted, and fine water seepage channels are cut off; through a specific construction process, the surface of the concrete wall is sealed by using an efficient alkali-resistant adhesive and an alkali-resistant moisture-proof polymer fiber membrane, so that the generation of saltpetering is prevented from two aspects, and the saltpetering problem of the concrete wall is radically solved.

Description

Technical Field

[0001] The invention belongs to the field of wall efflorescence treatment, and specifically relates to a water-based non-toxic concrete solidifier and a method for radical treatment of concrete wall efflorescence. Background Art

[0002] Efflorescence, also known as the "white bloom" phenomenon, is a common problem in daily home scenes, especially in humid environments. The efflorescence phenomenon is mainly caused by the fact that concrete is a silicate material. When this material encounters water vapor in the air or the wall, it will undergo a hydrolysis reaction. The generated hydroxide combines with metal ions to form hydroxides with low solubility (chemical properties are alkaline). When the temperature rises, the water vapor will evaporate and precipitate the hydroxide from the wall. As the water gradually evaporates, the hydroxide is also precipitated on the surface of the concrete. Over time, the original decorative coatings or paints are lifted up and no longer adhere to the wall surface, and whitening, peeling, and falling off occur. In the process of water migration in the wall, the scouring and dissolution of the wall will reduce the bearing capacity of the wall. At the same time, the powdering and peeling of the wall surface causes the structural cross-section of the wall to continue to decrease, and the load per unit area increases, increasing the unsafe factors of the structure.

[0003] In the prior art, some steel sheets with a certain thickness and rigidity are usually used to manually scrape off the efflorescence crystals on the surface, so as to achieve the purpose of removing the efflorescence crystals on the surface of the concrete wall. However, the manual scraping method does not cure the root cause. It scrapes off the efflorescence crystals on the surface of the wall by external force, which only achieves the purpose of temporary solution. It will continue to produce during subsequent use, and does not fundamentally solve the generation of efflorescence. In addition, a commonly used method is the machine sandblasting method, which uses a sandblasting machine or a shot blasting machine to spray steel shots or fine sand at high pressure to grind the concrete efflorescence surface, so as to achieve the purpose of removing efflorescence crystals and controlling the efflorescence problem. However, the sandblasting method is essentially the same as the manual scraping method. Although the effect of removing efflorescence crystals is stronger than the manual scraping method, it does not fundamentally solve the problem of efflorescence, and only achieves the purpose of temporary solution.

[0004] Therefore, it is very important to completely cure the efflorescence phenomenon and treat it from the source of efflorescence to effectively solve the problem of efflorescence on concrete walls, especially in humid environments. Summary of the invention

[0005] In order to solve the above technical problems, the purpose of the present invention is to provide a water-based non-toxic concrete solidifier and a method for curing alkali efflorescence on concrete walls. By preparing a water-based non-toxic concrete solidifier and applying it to concrete walls, it can help to cure the efflorescence problem.

[0006] To achieve the above-mentioned purpose, the present invention provides a water-based non-fouling concrete solidifier, wherein the raw materials of the water-based non-fouling concrete solidifier include: 18-28 parts of sodium silicate solution, 0.25-0.5 parts of alkanesulfonate ion surfactant, 0.5-2.5 parts of calcium oxide, 0-2 parts of ethylenediaminetetraacetic acid, 0.05-0.2 parts of sodium bisulfite, 4-6 parts of nano zinc oxide, 0.1-0.3 parts of potassium chloride, 0.1-0.5 parts of silane, 53-72 parts of deionized water, 1-3 parts of polyoxyethylene fatty alcohol ether, and 3-5 parts of magnesium fluorosilicate.

[0007] The raw materials of the water-based non-toxic concrete solidifier have the following effects:

[0008] The sodium silicate liquid can provide silicon element to enhance the strength and durability of concrete;

[0009] The alkanesulfonate ion surfactant can improve the dispersibility and wettability of the material and promote uniform coverage of the material;

[0010] The calcium oxide is a penetrant that can cause silicon ions to penetrate deeper into the concrete structure, thereby improving permeability and modification effects;

[0011] The ethylenediaminetetraacetic acid is a delay agent, which can delay gelation during the material formation process and increase the adaptability of the construction;

[0012] The sodium bisulfite is a reducing agent, which helps to maintain the reduced state of silicon ions and improve the waterproof effect;

[0013] The nano zinc oxide is a promoter that can enhance the surface area and activity of the waterproofing agent, and improve its anti-seepage ability and waterproofing effect;

[0014] The potassium chloride is an antifreeze agent, which can improve the stability of the material in a low temperature environment and prevent freezing damage;

[0015] The silane is a water-repellent, preferably methyltrimethoxysilane, which can enhance the water-repellent property and form an effective protective layer;

[0016] The deionized water is a carrier that can provide a suitable dissolution environment to ensure that the components are fully mixed;

[0017] The polyoxyethylene fatty alcohol ether is a defoaming agent, which is used to control the formation of bubbles in the material and ensure a smooth surface;

[0018] The magnesium fluorosilicate is a reinforcing agent, which can promote the reaction between silicate and basic ions in concrete in the solution, thereby enhancing the overall hardness of the concrete.

[0019] According to a specific embodiment of the present invention, preferably, the modulus of sodium silicate in the sodium silicate solution is 3.0-3.5, and the mass concentration is 30%-40%, more preferably 35%.

[0020] In the present invention, the water-based inorganic concrete compacting agent itself is an inorganic material, will not age, and can achieve the same life as the structure; it can compact the voids and slight cracks in the concrete wall itself, cut off the leakage channels and voids inside the concrete, and prevent water or moisture in the external soil from seeping through the cracks or voids inside the concrete wall, thereby avoiding the efflorescence phenomenon caused by the reaction with silicate substances on the surface of the concrete.

[0021] In some specific embodiments, preferably, the concrete water-based inorganic solidifier is obtained by mixing various components together and then stirring them uniformly.

[0022] The present invention also provides a method for curing efflorescence on concrete walls, wherein the method comprises:

[0023] (1) removing the decorative layer on the surface of the efflorescence wall to expose the concrete structure base surface; removing the efflorescence crystals on the base surface; after the efflorescence crystals are completely removed, washing the base surface;

[0024] (2) roughening the base surface; and rinsing the base surface after the roughening is completed;

[0025] (3) spraying the above-mentioned water-based non-destructive concrete solidifier on the base surface;

[0026] (4) After the surface on which the water-based non-toxic concrete agent is sprayed is completely dry, the base surface is sealed using a high-efficiency anti-alkali adhesive and an anti-alkali and moisture-proof polymer fiber membrane;

[0027] (5) After the high-efficiency anti-alkali adhesive is completely dry, restore the original decorative layer to complete the cure of alkali efflorescence on the concrete wall.

[0028] The present invention adopts an alkali-resistant and moisture-proof method to completely cure alkali efflux by preventing two major conditions that cause efflux on concrete walls. There are two reasons why concrete walls are prone to efflux: condition 1) there are many gaps in the concrete wall itself, and moisture outside the wall enters the room through the concrete structure itself, further increasing the indoor moisture and reacting with the wall surface to cause efflux; condition 2) the basement is generally humid, especially for buildings along the coast or close to rivers. Under long-term continuous humid conditions, it is very easy to cause the concrete structure wall to react with humid air and cause efflux on the wall. Therefore, the present invention cures the efflux problem by specifically solving the conditions for the efflux of the wall, wherein the concrete water-based non-toxic compacting agent can prevent external moisture from penetrating the interior of the concrete wall, prevent it from seeping into the concrete surface, and increase the compactness of the concrete, which corresponds to solving the condition 1) for the efflux; the high-efficiency alkali-resistant adhesive combined with the alkali-resistant and moisture-proof polymer fiber membrane can prevent the efflux caused by the reaction of indoor humid water vapor with the silicate substance of the concrete wall, which corresponds to solving the condition 2) for the efflux of concrete. Combining the above two points, the two prerequisites for the production of alkali-alkali can be completely prevented, thereby achieving the goal of completely curing the production of alkali-alkali.

[0029] According to a specific embodiment of the present invention, preferably, the operation of spraying the water-based non-condensing agent for concrete specifically comprises the following steps:

[0030] (a) First, spray water on the base surface to make it wet (also as a secondary cleaning), and after the base surface is wet and there is no obvious water residue on the surface, spray the first coat of water-based concrete non-destructive agent, with an amount of 120-140g per square meter; after spraying, cure for 10-15 minutes;

[0031] (b) After the curing is completed, spray water again. When the base surface is moist and there is no obvious water residue on the surface, spray the second coat of water-based concrete non-destructive agent. The usage amount per square meter is 240-280g.

[0032] According to a specific embodiment of the present invention, preferably, the amount of the second spraying of the concrete water-based non-invasive agent is increased by more than 50% compared with the first spraying. The second spraying can accelerate the penetration of the concrete water-based non-invasive agent.

[0033] In some specific embodiments, preferably, the water spraying operation is achieved using a handheld sprayer, and the operations of spraying the first and second coats of the water-based non-condensing concrete solidifying agent are achieved using a high-pressure sprayer.

[0034] In some specific embodiments, preferably, depending on the climate conditions, the maintenance time is 10 minutes in summer, 15 minutes in winter, and 12-14 minutes in spring and autumn; during summer construction, care should be taken to prevent the construction base from drying out too quickly, and watering should be carried out appropriately when necessary.

[0035] According to a specific embodiment of the present invention, preferably, the sealing operation specifically includes the following steps:

[0036] (I) mixing a high-efficiency anti-alkali adhesive and water in a mass ratio of 1:(1-2) (preferably 1:1.5) and stirring the mixture evenly, cutting the anti-alkali and moisture-proof polymer fiber membrane according to the construction area, and thinly coating the high-efficiency anti-alkali adhesive on any one side of the anti-alkali and moisture-proof polymer fiber membrane; the construction area is determined according to the size of the alkali-prone part;

[0037] (II) Adhere one side of the alkali-resistant and moisture-proof polymer fiber membrane with a thin layer of high-efficiency alkali-resistant adhesive to the base surface, flatten it from one side to the other side (for example, using a plastering scraper), and cover the surface of the alkali-resistant and moisture-proof polymer fiber membrane with the excess high-efficiency alkali-resistant adhesive material scraped off and smooth it.

[0038] According to a specific embodiment of the present invention, preferably, the thickness of the thin coating is 3-4 mm.

[0039] According to a specific embodiment of the present invention, preferably, the cut alkali-resistant and moisture-proof polymer fiber membranes are overlapped in a plurality of sheets, and the overlap width between the alkali-resistant and moisture-proof polymer fiber membranes is not less than 150 mm.

[0040] According to a specific embodiment of the present invention, preferably, the chiseling depth of the chiseling process is 3-5 mm, the chiseling spacing is 10-20 mm (preferably 15-20 mm), and the chiseling rate is not less than 95%.

[0041] In the above radical treatment method, preferably, the radical treatment method specifically comprises the following steps:

[0042] A1. Remove the decorative layer on the surface of the efflorescence wall to expose the original concrete structure base surface of the efflorescence wall;

[0043] A2. Remove efflorescence crystals on the concrete wall. The specific steps are as follows: first rinse the efflorescence area with clean water, then wash it with diluted hydrochloric acid with a mass ratio of 1:9 (hydrochloric acid: water) for 30-40 minutes to remove the efflorescence crystals on the wall surface;

[0044] A3. After the efflorescence crystals on the concrete wall are completely removed, rinse the area cleaned with hydrochloric acid with clean water to ensure that there is no scraping residue and chemical residue such as hydrochloric acid on the construction base surface;

[0045] A4. Use an electric hammer and a plum blossom-shaped chiseling head to roughen the concrete base surface in the alkali-bleeding area. The method is: continuously roughen the smooth base surface with a chiseling depth of 3-5mm, a chiseling spacing of 15-20mm, and a chiseling rate of not less than 95%; stop construction after the surface is roughened to ensure that the subsequent high-efficiency anti-alkali adhesive and anti-alkali moisture-proof polymer fiber membrane can enhance the bonding strength to the concrete wall;

[0046] A5. After the roughening is completed, use a high-pressure water gun to wash away the remaining debris and other attachments on the base surface to ensure that the construction base surface is clean and tidy;

[0047] A6. After cleaning, spray concrete water-based non-toxic solidifier on the alkali-rich areas of the concrete;

[0048] A7. After the concrete surface sprayed with water-based non-toxic solidifying agent is completely dry, use high-efficiency anti-alkali adhesive and anti-alkali and moisture-proof polymer fiber membrane to construct the alkali-resistant part of the concrete wall to seal the entire concrete base surface;

[0049] A8. After the high-efficiency anti-alkali adhesive on the construction site is completely dry (generally 12-24 hours), the original decorative layer can be restored as required and all processes are completed.

[0050] According to a specific embodiment of the present invention, preferably, the raw materials of the high-efficiency alkali-resistant adhesive include: 50-56 parts of PO 42.5 cement, 10-15 parts of sulfoaluminate cement, 2-3 parts of anhydrous sodium silicate, 0.3-0.5 parts of nanocellulose, 0.4-0.6 parts of calcium stearate, 5-7 parts of micron-grade silica fume powder, 3-4 parts of redispersible latex powder, 1-2 parts of modified aluminum powder, 0.2-0.3 parts of polycarboxylic acid water reducer, and 3-5 parts of silicon dioxide powder.

[0051] Among them, the raw materials of the high-efficiency anti-alkali adhesive have the following effects:

[0052] The anhydrous sodium silicate can provide adhesion and anti-hydration properties, accelerate the hardening process, and enhance the waterproof effect; the nanocellulose can improve the crack resistance and toughness of the material, while enhancing its permeability;

[0053] The calcium stearate can reduce water absorption, improve waterproof effect, and enhance the durability of the material;

[0054] The micron-sized silica fume powder can increase the density and filling property of the material, while improving its durability;

[0055] The redispersible latex powder can improve the water resistance and weather resistance of the material;

[0056] The polycarboxylate water reducer can improve the fluidity of the material, reduce the water consumption, and enhance the compressive and flexural strength of the material;

[0057] The silicon dioxide fine powder can improve the compression resistance and wear resistance of the material, and improve its waterproof performance.

[0058] In the present invention, the high-efficiency anti-alkali adhesive is developed based on the problem of alkali efflux. The material itself has good anti-alkali and moisture-proof functions, and the expansion coefficient of the material is similar to that of concrete, so it is not easy to hollow out and fall off. The anti-alkali and moisture-proof polymer fiber membrane can be firmly bonded to the concrete base surface without falling off.

[0059] In some specific embodiments, preferably, the high-efficiency alkali-resistant adhesive is prepared by the following steps:

[0060] Mix PO 42.5 cement and sulphoaluminate cement evenly to obtain a base material cement mixture; dissolve anhydrous sodium silicate in an appropriate amount of water to obtain a reinforcing agent, and gradually add it to the cement mixture and stir; add nanocellulose to the system for fiber reinforcement and stir evenly to ensure crack resistance and enhance toughness; then gradually add the waterproof component calcium stearate to ensure improved waterproof performance; continue to add filler micron-level silica fume to ensure the density of the material and reduce porosity; then add redispersible latex powder and expansion agent modified aluminum powder to enhance adhesion and improve the expansion performance of the material; then add polycarboxylate water reducer to adjust the fluidity according to the working environment of the material to ensure construction fluidity; finally, adjust the fluidity and viscosity of the mixture by silica micropowder, add an appropriate amount of water when necessary to ensure that the material has good workability, and obtain a high-efficiency alkali-resistant adhesive after mixing.

[0061] In some specific embodiments, the alkali-resistant and moisture-proof polymer fiber membrane is composed of a high-strength polymer sheet containing a polymer resin in the middle of the sheet. Conventional polymer fiber membranes in the art can be selected, and they can simultaneously meet the indicators of serial numbers 1 and 3 in Table 1; preferably, the alkali-resistant and moisture-proof polymer fiber membrane simultaneously meets the indicators of serial numbers 1, 2, and 3 in Table 1; more preferably, the alkali-resistant and moisture-proof polymer fiber membrane simultaneously meets the indicators of serial numbers 1, 2, 3, 4, and 5 in Table 1.

[0062] Table 1. Alkali and moisture-proof polymer fiber membrane indicators

[0063]

[0064] In the present invention, the alkali-resistant and moisture-proof polymer fiber membrane is impermeable and airtight, and can completely isolate moisture in the air to prevent moisture from reacting with the concrete wall; in addition, the high-efficiency alkali-resistant adhesive can completely penetrate into the pores of the alkali-resistant and moisture-proof polymer fiber membrane, firmly combining into a whole, thereby enhancing the sealing and adhesion to the wall. Therefore, the use of the high-efficiency alkali-resistant adhesive and the alkali-resistant and moisture-proof polymer fiber membrane forms a water-proof and airtight high-bonding strength sealing layer, which can further prevent the humid water vapor in the air from reacting with the silicate substance on the concrete surface.

[0065] According to a specific embodiment of the present invention, preferably, the breaking strength of the alkali-resistant and moisture-proof polymer fiber membrane is ≥700N; and the breaking elongation of the alkali-resistant and moisture-proof polymer fiber membrane is ≥30%.

[0066] Traditional efflorescence treatment methods such as pickling, sandblasting or grinding only perform surface treatment by physical or chemical methods, but do not fundamentally solve the efflorescence problem. During the subsequent 3-6 months of use, efflorescence will still occur. Different from traditional solutions, the beneficial effects of the present invention are:

[0067] (1) The method for curing alkali efflorescence on concrete walls provided by the present invention is to, firstly, isolate indoor humid air from reacting with silicates on the surface of the concrete wall, and secondly, prevent moisture in the external soil from seeping through cracks inside the concrete wall and reacting with silicates on the surface of the concrete. The two major causes of efflorescence are treated, and the conditions for efflorescence are fundamentally cut off, thereby achieving the purpose of completely curing efflorescence.

[0068] (2) The water-based non-toxic concrete solidifier, high-efficiency anti-alkali adhesive and anti-alkali and moisture-proof polymer fiber membrane used in the present invention are all produced in response to the problem of efflorescence and are more suitable for the treatment of efflorescence than similar materials on the market. The present invention combines specific construction materials with specific construction methods to achieve the purpose of completely curing efflorescence.

[0069] (3) The method for radical treatment of concrete wall efflorescence provided by the present invention improves the durability and stability of the wall; the method is not only applicable to newly built walls, but also can be used to repair and improve existing walls, providing a reliable solution for the long-term health and performance of building structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0070] Figure 1 The wall is a wall with the original concrete structure base exposed after removing the decorative layer on the alkali-stained part of the wall.

[0071] Figure 2 The wall after removing the white crystals from the alkali-rich areas on the wall.

[0072] Figure 3 The wall is roughened on the alkali-affected areas.

[0073] Figure 4 It is a wall after spraying concrete water-based non-destructive solidifier on the alkali-resistant part of the wall.

[0074] Figure 5 For the wall after the construction of high-efficiency anti-alkali adhesive and anti-alkali and moisture-proof polymer fiber membrane.

[0075] Figure 6 The wall is formed after the decorative layer on the wall surface is restored after the treatment is completed.

[0076] Figure 7 This is a flow chart of the method for radical treatment of efflorescence on concrete walls in Example 1. DETAILED DESCRIPTION

[0077] In order to have a clearer understanding of the technical features, purposes and beneficial effects of the present invention, the technical solution of the present invention is now described in detail below, but it should not be construed as limiting the applicable scope of the present invention.

[0078] Embodiment 1:

[0079] The present embodiment provides a method for curing alkali efflorescence on concrete walls. The cured concrete walls are located in the basement of a food factory. The basement is a cold storage project. There is a large temperature difference between the underground and the ground, and the project is close to the Xitang River, which leads to high humidity in the basement. Therefore, multiple alkali efflorescence areas appear on the outer walls of the basement, causing the peeling of decorative layers such as putty.

[0080] The composition of the water-based inorganic solidifying agent for concrete used in this embodiment includes: sodium silicate solution (20 parts), alkanesulfonate ion surfactant (0.35 parts), calcium oxide (1.8 parts), ethylenediaminetetraacetic acid (1 part), sodium bisulfite (0.1 parts), nano zinc oxide (4 parts), potassium chloride (0.3 parts), methyltrimethoxysilane (0.35 parts), deionized water (68 parts), polyoxyethylene fatty alcohol ether (2.5 parts), and magnesium fluorosilicate (4 parts). The modulus of sodium silicate in the sodium silicate solution is 3.0, and the mass concentration is 35%.

[0081] The composition of the high-efficiency alkali-resistant adhesive used in this embodiment includes 52 parts of PO 42.5 cement, 13 parts of sulphoaluminate cement, 2 parts of anhydrous sodium silicate, 0.5 parts of nanocellulose, 0.4 parts of calcium stearate, 5 parts of micron-grade silica fume powder, 3 parts of redispersible latex powder, 1.5 parts of modified aluminum powder, 0.3 parts of polycarboxylic acid water reducer, and 4 parts of silicon dioxide powder.

[0082] The alkali-resistant and moisture-proof polymer fiber membrane used in this embodiment is a polymer fiber membrane with alkali-resistant and moisture-proof functions.

[0083] The process of the radical treatment method adopted in this embodiment is as follows Figure 7 As shown, the specific implementation steps are as follows:

[0084] A1: Use a spatula to scrape off the putty (exterior decoration layer) and leveling layer on the wall. Figure 1 As shown, the original concrete structure base surface of the efflorescence area is exposed;

[0085] A2: Use a high-pressure water gun to clean the exposed concrete base surface. After the construction base surface is completely dry, use diluted hydrochloric acid with a mass ratio of 1:9 to clean it. Use diluted hydrochloric acid to remove the efflorescence crystals on the base surface; use a high-pressure water gun to clean the concrete wall again after 10 minutes to ensure that there is no residual hydrochloric acid. The wall after cleaning should be as follows: Figure 2 As shown;

[0086] A3: Use an electric hammer and a chiseling head to roughen the efflorescence area of ​​the concrete to enhance the adhesion of the base surface. The chiseling depth is about 3mm, the chiseling spacing is about 10-15mm, and the chiseling rate is about 97%. The chiseling is done until the surface of the efflorescence area of ​​the concrete is rough. After the chiseling is completed, use a high-pressure water gun to clean the construction base surface. The base surface must be clean and tidy. The resulting wall surface is as follows Figure 3 As shown;

[0087] A4: Put the concrete water-based non-stick agent and clean water into a small hand-held sprayer and a high-pressure sprayer respectively, and spray the concrete water-based non-stick agent. First, use a small hand-held sprayer filled with clean water to spray the construction base surface until it is wet. After about 10 minutes without obvious water residue on the surface, spray the first coat of concrete water-based non-stick agent at a dosage of 140g / m 2 , enhance the compactness of concrete and cut off the internal water seepage channel; after curing for 15 minutes, low-pressure watering is evenly carried out for the second time. After about 10 minutes when there is no obvious water residue on the surface, the second spraying of concrete water-based non-destructive compacting agent is carried out again. The dosage this time is 280g / m 2 The purpose is to accelerate the penetration of water-based non-destructive concrete solidifiers, and the resulting wall surface is as follows Figure 4 As shown;

[0088] A5: After the concrete water-based non-toxic solidifier is dry, the high-efficiency anti-alkali adhesive and anti-alkali moisture-proof polymer fiber membrane are constructed to seal the concrete wall base. The specific process is as follows:

[0089] (a) Put the high-efficiency anti-alkali adhesive and clean water into 20L empty barrels respectively, mix them in a mass ratio of 1:1.5, and stir them evenly with a mixer for later use; cut 25m2 of the barrel according to the construction area 2 Alkali-resistant and moisture-proof polymer fiber membrane, wherein the width of the alkali-resistant and moisture-proof polymer fiber membrane is 1m and the cutting length is 25m;

[0090] (b) Cut the alkali-resistant and moisture-proof polymer fiber membrane into 5 sheets of 1m×5m in size. After the preparation is completed, take any one of the alkali-resistant and moisture-proof polymer fiber membranes and apply a 3mm thick high-efficiency alkali-resistant adhesive on any one side; then adhere one side of the alkali-resistant and moisture-proof polymer fiber membrane thinly coated with the high-efficiency alkali-resistant adhesive to the construction base surface;

[0091] (c) Use a plastering scraper to flatten it from one side to the other, and cover the scraped excess high-efficiency anti-alkali adhesive material on the surface of the anti-alkali and moisture-proof polymer fiber membrane and smooth it; and so on. Figure 5 As shown in the figure, the remaining high-efficiency anti-alkali adhesive and anti-alkali moisture-proof polymer fiber membrane are constructed according to this operation, and the operation is completed; the overlap width between the anti-alkali moisture-proof polymer fiber membranes is 170mm;

[0092] A6: After the high-efficiency anti-alkali adhesive is completely dry, restore the original exterior layer of the wall. The resulting wall surface is as follows: Figure 6 shown.

[0093] Comparative Example 1

[0094] This comparative example adopts a physical removal method to treat efflorescence on the concrete wall, and the specific steps are: using a steel sheet to scrape off the efflorescence crystals in the experimental area.

[0095] Comparative Example 2

[0096] This comparative example adopts a chemical removal method to treat the alkali blooming on the concrete wall. The specific steps are: prepare 10% diluted hydrochloric acid, wash the alkali blooming parts of the concrete wall, and then rinse them with clean water.

[0097] Comparative Example 3

[0098] This comparative example provides a method for treating alkali efflorescence on concrete walls, wherein the manufacturers of the X12 nanometer alkali remover, X9 concrete capillary sealant, X13 high-strength alkali-resistant repair agent, X14 composite polymer alkali-resistant fiber, and X16 alkali-resistant and mildew-resistant special coating used are all Jiagushi New Materials Co., Ltd. The specific experimental steps are as follows:

[0099] (1) Base treatment, removal of surface decoration, and cleaning;

[0100] (2) When the wall surface is seriously alkali-returned, use X12 nano alkali remover to remove alkali first;

[0101] (3) Spray X9 concrete capillary sealant to compact the micro cracks and pores inside the wall;

[0102] (4) After the base surface is dry, apply X14 composite polymer anti-alkali fiber with X13 high-strength anti-alkali repair agent to ensure that it is tightly bonded to the base surface and smooth without hollows;

[0103] (5) Apply another coat of X13 high-strength alkali-resistant repair agent;

[0104] (6) After drying, apply X16 anti-alkali and anti-mildew special paint, and make it smooth;

[0105] (7) Construction completed.

[0106] Test Example 1

[0107] The following is a comparative monitoring of the efflorescence treatment effect of the concrete wall in Example 1 and Comparative Examples 1-2, and the monitoring method is as follows:

[0108] The same environmental conditions (i.e., the same degree of efflorescence, the same wall, and the same temperature environment of 25°C) were selected, and the area selected for each method was 2m 2 The wall surface was observed and recorded for efflorescence at 30 days (d), 60 days, 90 days and 120 days after the efflorescence crystals were removed by the methods in Example 1 and Comparative Examples 1-2, so as to compare the effects of each method, and a blank group was set for control; wherein the percentage represents the efflorescence surface coverage, that is, the proportion of the efflorescence area to the total area, and the test results are shown in Table 2.

[0109] Table 2. Observation results of alkali-fat surface coverage in test example 1

[0110] Sample 0d 30d 60d 90d 120d Blank group 65％ 68％ 72％ 75％ 82％ Comparative Example 1 0％ 3％ 19％ 34％ 41％ Comparative Example 2 0％ 5％ 15％ 28％ 32％ Example 1 0％ 0％ 0％ 0％ 0％

[0111] According to the observation and statistical results of the four areas with similar efflorescence levels in Table 2, it can be seen that the growth rate of the efflorescence surface coverage rate in the blank group is relatively stable. In 30d-90d, the growth rate of the efflorescence surface coverage rate is about 3%-4%. Although the growth rate is slower than that of other groups, there is a situation where the original efflorescence area becomes more serious. After physical removal, the growth of the efflorescence surface coverage rate of Comparative Example 1 is relatively rapid in 30d-120d, and the growth is relatively slow in 0d-30d. The experimental results of Comparative Example 2 are similar to those of Comparative Example 1. After chemical removal, the growth of the efflorescence surface coverage rate is also relatively rapid in 30d-120d, and the growth is relatively slow in 0d-30d.

[0112] In contrast, in the efflorescence treatment method adopted in Example 1 of the present invention, no efflorescence crystals were produced during the period of 0d-120d.

[0113] The above experimental results show that the physical and chemical methods (such as pickling method, scraping method, etc.) used in Comparative Examples 1-2 did not achieve the "radical cure" effect emphasized in the present invention, but only removed the efflorescence crystals that appeared on the surface of the concrete wall, but failed to start from the root cause of the efflorescence. The efflorescence phenomenon still occurred during the subsequent 1-3 months of use; while Example 1 started from the two major conditions for the generation of efflorescence, one is to inhibit the slow infiltration of external moisture or moisture into the room, and the other is to solve the problem of indoor humid air, especially in environments such as basements, where humid water vapor reacts with the concrete wall surface, resulting in peeling of the exterior decoration layer due to efflorescence.

[0114] Therefore, different from the treatment method focusing on the appearance in the traditional construction method, the present invention treats the problem from the source, which can effectively solve the problem of efflorescence and achieve the purpose of curing the problem of efflorescence.

[0115] Test Example 2

[0116] The following is a comparative monitoring of the efflorescence treatment effect of the concrete wall in Example 1 and Comparative Example 3, and the monitoring method is as follows:

[0117] The same wall with the same degree of efflorescence was selected, and three areas of equal area were divided at the same ambient temperature (25°C) (the wall area selected in this experiment was different from that in Test Example 1), and the methods in Comparative Example 3 and Example 1 were used for efflorescence treatment, respectively, and a blank group was set for control; after the construction was completed, the experimental results were compared with a period of 90 days, and observations and statistics were performed every 30 days. The results are shown in Table 3.

[0118] Table 3. Observation results of alkali surface coverage in test example 2

[0119] 0d 30d 60d 90d Blank group 52％ 57％ 66％ 72％ Comparative Example 3 0％ 2％ 5％ 7％ Example 1 0％ 0％ 0％ 0％

[0120] From the experimental results in Table 3, it can be seen that in the blank group, without human intervention, the coverage rate of the efflorescence surface showed a natural growth trend, and when the efflorescence area continued to increase, the efflorescence area previously produced also became more serious.

[0121] The results of Comparative Example 3 show that the method and material have a certain inhibitory effect on efflorescence, but as the experiment continues, slight efflorescence begins to occur; therefore, if the experiment is prolonged, large-scale efflorescence will also occur in Comparative Example 3. In contrast, the efflorescence treatment method used in Example 1 of the present invention does not produce efflorescence crystals during the process of 0d-90d.

[0122] Furthermore, the performance of the water-based non-toxic concrete solidifier used in Example 1 and the X9 concrete capillary sealant used in Comparative Example 3 were tested separately. Taking C30 grade concrete as an example, the two materials were sprayed on the surface and compared. The results are shown in Table 4.

[0123] Table 4. Performance comparison of concrete water-based non-toxic solidifier and X9 capillary sealant

[0124] Sample Penetration Depth Improved anti-seepage Applicable scenarios X9 capillary sealant Surface sealing 0％ Small area slightly damp Water-based non-stick concrete agent Penetration inside 50mm 20-30％ Large area of ​​anorectic efflux

[0125] From the results in Table 4, it can be seen that the concrete water-based non-toxic compacting agent used in Example 1 has a higher penetration depth than the X9 concrete capillary sealant in Comparative Example 3, and is not limited to surface sealing, but can achieve a penetration of about 50 mm to further enhance its own compactness; at the same time, the concrete water-based non-toxic compacting agent also improves the impermeability grade of the concrete itself, thereby completely cutting off the gaps and voids inside the concrete, which is suitable for solving the condition one of efflorescence, that is, inhibiting the process of slow infiltration of external moisture or moisture into the room. Therefore, the materials and methods used in Example 1 are more targeted at the conditions for the efflorescence problem, and are therefore more suitable for the efflorescence treatment problem.

[0126] Therefore, based on the above results, the reasons why the results of Comparative Example 3 are not ideal are: (1) the X9 concrete capillary sealant used in Comparative Example 3 only seals the surface layer of the concrete, which is not effective for the dense concrete itself and cannot prevent the generation of alkali-eluting crystals. At the same time, as the crystals continue to be generated, the surface sealing layer will also be destroyed; (2) the X13 high-strength alkali-resistant repair agent and X14 composite polymer alkali-resistant fiber used in Comparative Example 3 are mainly used for waterproofing, and the effect on the treatment of alkali-eluting is not ideal. Because the principle of the two is mainly to block the high water pressure outdoors through good bonding force, but for the conditions for the generation of alkali-eluting, not only good bonding force is required to prevent the crystals generated by alkali-eluting from lifting up, but also the ability to prevent external moisture and humidity from entering the room.

[0127] In contrast, the method in Example 1 can firstly greatly compact the voids in the concrete itself, and the penetration depth can ensure that water or moisture from the outside to the inside cannot penetrate the interior of the concrete, thereby avoiding the occurrence of efflorescence crystals; secondly, the combination of the alkali-resistant and moisture-proof polymer fiber membrane and the high-efficiency alkali-resistant adhesive can ensure that the sealed surface layer not only has good adhesion for long-term use, but also can be impermeable and airtight, thereby completely blocking the indoor moisture or humidity from penetrating the material and reacting with the concrete structure, avoiding the formation of efflorescence crystals. Therefore, the purpose of radically curing the generation of efflorescence is achieved.

Claims

1. A water-based non-toxic concrete solidifier, wherein: The raw materials of the water-based inorganic solidifying agent for concrete include: 18-28 parts of sodium silicate liquid, 0.25-0.5 parts of alkanesulfonate ion surfactant, 0.5-2.5 parts of calcium oxide, 0-2 parts of ethylenediaminetetraacetic acid, 0.05-0.2 parts of sodium bisulfite, 4-6 parts of nano zinc oxide, 0.1-0.3 parts of potassium chloride, 0.1-0.5 parts of silane, 53-72 parts of deionized water, 1-3 parts of polyoxyethylene fatty alcohol ether, and 3-5 parts of magnesium fluorosilicate.

2. The water-based inorganic solidifying agent for concrete according to claim 1, wherein: The modulus of sodium silicate in the sodium silicate solution is 3.0-3.5, and the mass concentration is 30%-40%.

3. A method for curing alkali efflorescence on concrete walls, wherein: The radical treatment method includes: (1) removing the decorative layer on the surface of the efflorescence wall to expose the concrete structure base surface; removing the efflorescence crystals on the base surface; after the efflorescence crystals are completely removed, washing the base surface; (2) roughening the base surface; and rinsing the base surface after the roughening is completed; (3) spraying the water-based non-invasive concrete compacting agent according to claim 1 or 2 onto the base surface; (4) After the surface on which the water-based non-toxic concrete agent is sprayed is completely dry, the base surface is sealed using a high-efficiency anti-alkali adhesive and an anti-alkali and moisture-proof polymer fiber membrane; (5) After the high-efficiency anti-alkali adhesive is completely dry, restore the original decorative layer to complete the cure of alkali efflorescence on the concrete wall.

4. The radical treatment method according to claim 3, wherein: The spraying operation specifically comprises the following steps: (a) First, spray water on the base surface to make it wet. After the base surface is wet and there is no obvious water residue on the surface, spray the first coat of water-based concrete non-destructive agent, with the usage amount of 120-140g per square meter; after spraying, cure for 10-15 minutes; (b) After the curing is completed, spray water again. When the base surface is moist and there is no obvious water residue on the surface, spray the second coat of water-based concrete non-destructive agent, with a usage of 240-280g per square meter; Preferably, the amount of the second coat of sprayed concrete water-based non-toxic solidifying agent is increased by more than 50% compared with the first coat.

5. The radical treatment method according to claim 3, wherein: The sealing operation specifically comprises the following steps: (I) mixing a high-efficiency anti-alkali adhesive and water in a mass ratio of 1:(1-2) and stirring evenly, cutting an anti-alkali and moisture-proof polymer fiber membrane according to the construction area, and thinly coating the high-efficiency anti-alkali adhesive on any side of the anti-alkali and moisture-proof polymer fiber membrane; (II) One side of the alkali-resistant and moisture-proof polymer fiber membrane with a thin coating of high-efficiency alkali-resistant adhesive is bonded to the base surface, and it is pressed flat from one side to the other side, and the excess high-efficiency alkali-resistant adhesive material is scraped off to cover the surface of the alkali-resistant and moisture-proof polymer fiber membrane and smooth it.

6. The radical treatment method according to claim 5, wherein: The thickness of the thin coating is 3-4 mm.

7. The radical treatment method according to claim 5 or 6, wherein: The cut alkali-resistant and moisture-proof polymer fiber membranes are overlapped in multiple pieces, and the overlap width between the alkali-resistant and moisture-proof polymer fiber membranes is not less than 150 mm.

8. The radical treatment method according to claim 3, wherein: The roughening process has a roughening depth of 3-5 mm, a roughening spacing of 10-20 mm, and a roughening rate of not less than 95%.

9. The radical treatment method according to claim 3, wherein: The raw materials of the high-efficiency alkali-resistant adhesive include: 50-56 parts of PO 42.5 cement, 10-15 parts of sulphoaluminate cement, 2-3 parts of anhydrous sodium silicate, 0.3-0.5 parts of nanocellulose, 0.4-0.6 parts of calcium stearate, 5-7 parts of micron-grade silica fume powder, 3-4 parts of redispersible latex powder, 1-2 parts of modified aluminum powder, 0.2-0.3 parts of polycarboxylic acid water reducer, and 3-5 parts of silicon dioxide micropowder.

10. The radical treatment method according to claim 3, wherein: The breaking strength of the alkali-resistant and moisture-proof polymer fiber membrane is ≥700N; the breaking elongation of the alkali-resistant and moisture-proof polymer fiber membrane is ≥30%.

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