Multi-component concrete surface reinforcing agent and application method thereof

Abstract

The invention belongs to the technical field of concrete surface reinforcing agents, and discloses a multi-component concrete surface reinforcing agent and an application method thereof. The multi-component concrete surface reinforcing agent comprises four components, a component A comprises a modified penetrant, fluorocarbon modified polyacrylate and C12-14 fatty alcohol, a component B comprises a silane coupling agent, magnesium naphthenate, ethanol and water, a component C comprises potassium trifluoroborate, a modified penetrant and water glass, and a component D comprises potassium trifluoroborate, a modified penetrant and water glass. The component D is prepared from isobutyltriethoxysilane, a coalescing agent and sodium methyl silicate. The multi-component concrete surface reinforcing agent is sprayed in a staged manner during application, firstly, the component A is used for breaking through'veins' and improving the penetration depth of each component in concrete, secondly, the component B and the component C sequentially penetrate into the concrete to form crystals to improve the surface rebound strength of the concrete, and finally, the component D plays a role in'closing ', so that the durability of the concrete is improved, and the service life of the concrete is prolonged. Finally, the effects of enhancing permeation and improving the surface rebound strength and durability of the concrete are achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of concrete surface enhancers, and in particular relates to a multi-component concrete surface enhancer and an application method thereof. Background Art

[0002] Concrete surface enhancer is a polymer liquid material that can quickly penetrate into the concrete by evenly spraying it on the concrete surface. It reacts with calcium hydroxide and other by-products of cement hydration in the concrete to generate a large amount of calcium carbonate, which can effectively block the capillary pores inside the concrete, thereby increasing the surface properties of the concrete, such as density, compressive strength, hardness, wear resistance, air tightness, impermeability and carbonization resistance.

[0003] Most of the concrete surface enhancers currently on the market have the disadvantages of low penetration depth after painting and poor surface enhancement effect. Patent CN111606736A discloses a concrete surface enhancer and its preparation and use method. The concrete enhancer is prepared using silicone resin, talcum powder, sulfate and water as raw materials. Although it can effectively improve the corrosion resistance of concrete, it has little improvement on the penetration depth. Patent CN116874315A discloses a concrete surface enhancer and its preparation method and application. The raw materials of the surface enhancer include silicone resin, filling powder, latex powder, sodium sulfate, admixture and water. Although it has good anti-permeability and anti-carbonization properties, it has little improvement on the rebound strength of the concrete surface. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a multi-component concrete surface enhancer and an application method thereof in view of the deficiencies in the prior art. The surface enhancer includes four components, which are sprayed in stages during application. First, component A is used to open up the "veins" of concrete and increase the penetration depth of each component in the concrete. Then, components B and C penetrate into the concrete in turn to form crystals to increase the rebound strength of the concrete surface. Finally, component D plays a "sealing" role to improve the durability of the concrete. Under the synergistic effect of multiple components, the effects of enhanced penetration and improved rebound strength and durability of the concrete surface are achieved.

[0005] In order to solve the technical problem proposed by the present invention, the present invention provides a multi-component concrete surface enhancer, which includes four components, wherein component A includes a modified penetrant, fluorocarbon modified polyacrylate and C12-14 fatty alcohol, component B includes a silane coupling agent, magnesium cyclohexaneate, ethanol and water, component C includes potassium trifluoroborate, a modified penetrant and water glass, and component D includes isobutyl triethoxysilane, a film-forming aid and sodium methyl silicate.

[0006] In the above scheme, in the component A, the mass ratio of the modified penetrant, the fluorocarbon modified polyacrylate and the C12-14 fatty alcohol is 15:(1-2):(1-2).

[0007] In the above scheme, in the B component, the mass ratio of silane coupling agent, magnesium cyclohexaneate, ethanol and water is (1-2):(1-2):(4-6):12.

[0008] In the above scheme, in the C component, the mass ratio of potassium trifluoroborate, modified penetrant and water glass is 4:(1-2):(1-2).

[0009] In the above scheme, in the D component, the mass ratio of isobutyltriethoxysilane, film-forming aid and sodium methyl silicate is (1-2):(1-3):12.

[0010] In the above scheme, the preparation method of the modified penetrant comprises the following steps:

[0011] 1) adding isooctyl alcohol polyoxyethylene ether to water, and then adding alcohol ether phosphate dropwise thereto under heating and stirring conditions to prepare solution a;

[0012] 2) mixing hexamethyldisiloxane and hydrochloric acid, heating and stirring to obtain solution b;

[0013] 3) Add solution a and solution b to the reaction container simultaneously, then heat and stir to react, cool after the reaction, and adjust the pH of the product to 7-8 with an alkaline solution to obtain a modified penetrant.

[0014] Furthermore, the mass ratio of the isooctyl alcohol polyoxyethylene ether to water is 1:(2-3).

[0015] Furthermore, in step 1), the heating temperature is 60-70° C., and the stirring rate is 800-1200 r / min.

[0016] Furthermore, the mass ratio of the alcohol ether phosphate to the isooctyl alcohol polyoxyethylene ether is 1:(1-1.5).

[0017] Furthermore, the alcohol ether phosphate is added dropwise over 30 to 40 minutes, and heating and stirring are continued for 3 to 5 minutes after the addition is completed.

[0018] Furthermore, the concentration of the hydrochloric acid is 2-3 mol / L.

[0019] Furthermore, the mass ratio of hexamethyldisiloxane to hydrochloric acid is (3-4):1.

[0020] Furthermore, in step 2), the heating and stirring time is 30 to 40 minutes, the heating temperature is 30 to 40° C., and the stirring rate is 500 to 800 r / min.

[0021] Furthermore, the mass ratio of solution a to solution b is (2-3):1.

[0022] Furthermore, the dropwise addition of solution a and solution b is controlled to be completed within 20 to 30 minutes.

[0023] Furthermore, in step 3), the heating and stirring time is 40 to 60 minutes, the heating temperature is 45 to 50° C., and the stirring rate is 800 to 1000 r / min.

[0024] In the above solution, the fluorocarbon modified polyacrylate is BASF EFKA FL 3772.

[0025] In the above scheme, the silane coupling agent is one or more of hexamethyldisiloxane, vinyltriethoxysilane, and propyltrimethoxysilane.

[0026] In the above solution, the modulus of the water glass is 1.5 to 1.7.

[0027] In the above scheme, the film-forming aid is an ether alcohol polymer.

[0028] Preferably, the film-forming aid is one or both of propylene glycol butyl ether and propylene glycol methyl ether acetate.

[0029] The present invention also provides an application method of a multi-component concrete surface enhancer, comprising the following steps:

[0030] S1, clean the concrete surface and spray component A twice with an interval of 15 to 20 minutes;

[0031] S2, spray component B immediately after component A is sprayed, spray twice, with an interval of 30 to 40 minutes;

[0032] S3, spray component C 24 to 48 hours after component B is sprayed, spray twice, with an interval of 10 to 15 minutes;

[0033] S4, spray component D 4 to 6 hours after component C is sprayed, spray once and let dry naturally.

[0034] In the above scheme, the spraying amount of component A is: 0.15~0.2kg / m 2 , the second time 0.4~0.5kg / m 2 .

[0035] In the above scheme, the spraying amount of component B is: 0.3-0.35kg / m 2 , the second time 0.3~0.35kg / m 2 .

[0036] In the above scheme, the spraying amount of component C is: 0.3-0.4 kg / m 2 , the second time 0.2~0.25kg / m 2 .

[0037] In the above scheme, the spraying amount of component D is 0.3-0.4 kg / m 2 .

[0038] Compared with the prior art, the present invention has the following beneficial effects:

[0039] The surface enhancer of the present invention comprises four components, which are sprayed in stages during application. First, component A opens up the "veins" of concrete through modified penetrants and related fluorocarbon active agents, thereby increasing the penetration depth of each component of the surface enhancer on the concrete. The modified penetrant can reduce the surface tension of the concrete material. When the modified enhancer penetrates into the interior of the concrete, it can promote the diffusion of liquid inside. At the same time, the addition of organic fluorine improves the hydrophobicity of the enhancer, thereby greatly reducing the corrosion of rainwater and the like on the concrete surface. Secondly, the magnesium cyclopentaneate in component B can not only provide magnesium ions to the interior of the concrete, but also the cyclopentaneate radicals and silane radicals can interact with each other. The combination of coupling agents can effectively reduce the surface tension of concrete, thereby increasing the penetration depth of component B and subsequent components in concrete; subsequently, the borate and silicate in component C react with the free calcium ions in the concrete and the magnesium ions added in component B to form calcium-magnesium gel, which enhances the compactness of the concrete surface, thereby improving the surface strength of the concrete; finally, component D plays a "sealing" role, and butyltriethoxysilane and sodium methyl silicate in component D can play a good waterproof and stain-resistant effect on the concrete surface, while the film-forming aid can effectively improve the film-forming hardness and density of the enhancer, and reduce the penetration of pollutants. Finally, under the synergistic effect of multiple components, the surface enhancer of the present invention can effectively penetrate 10 to 12 mm inside the concrete, and can effectively improve the rebound strength of the concrete surface by 7 to 10 MPa, and the rebound strength improvement rate reaches 27 to 35%. At the same time, the stain-resistant and waterproof performance of the concrete surface is greatly improved, thereby improving the durability of the concrete. DETAILED DESCRIPTION

[0040] In order to better understand the present invention, the content of the present invention is further explained below in conjunction with the embodiments, but the content of the present invention is not limited to the following embodiments.

[0041] In the following examples, the modulus of the water glass used is 1.5, and the fluorocarbon modified polyacrylate used is BASF EFKAFL 3772.

[0042] Example 1

[0043] A multi-component concrete surface enhancer comprises four components, wherein component A comprises a modified penetrant, fluorocarbon modified polyacrylate and C12-14 fatty alcohol in a mass ratio of 15:1.5:1, component B comprises vinyl triethoxysilane, magnesium cyclohexaneate, anhydrous ethanol and deionized water in a mass ratio of 1.25:1:4:12, component C comprises potassium trifluoroborate, a modified penetrant and water glass in a mass ratio of 4:1:2, and component D comprises isobutyl triethoxysilane, propylene glycol butyl ether and sodium methyl silicate in a mass ratio of 2:1:12.

[0044] The preparation method of the modified penetrant comprises the following steps:

[0045] 1) adding isooctyl alcohol polyoxyethylene ether to water in a mass ratio of 1:2, then adding alcohol ether phosphate dropwise thereto under heating at 60°C and stirring at 800r / min, in a mass ratio of 1:1, the alcohol ether phosphate is added dropwise over 30min, and heating and stirring are continued for 3min after the addition is completed to obtain solution a;

[0046] 2) mixing hexamethyldisiloxane and 2 mol / L hydrochloric acid in a mass ratio of 4:1, and then stirring at 500 r / min for 30 min at 30° C. to obtain solution b;

[0047] 3) Solution a and solution b are simultaneously added dropwise to a three-necked flask, the mass ratio of solution a to solution b is 2:1, and the addition of solution a and solution b is controlled to be completed within 20 min, and then stirred at 800 r / min for 50 min at a temperature of 50° C. for reaction. After the reaction is completed, it is naturally cooled, and the pH value of the product is adjusted to 7 with a sodium hydroxide solution with a mass fraction of 40%, to obtain a modified penetrant.

[0048] The application method of the above-mentioned multi-component concrete surface enhancer comprises the following steps:

[0049] S1: Clean the concrete surface and spray component A with a spraying amount of 0.2kg / m 2 15 minutes later, spray component A again with a spraying amount of 0.4kg / m 2 ;

[0050] S2: After spraying component A, component B is sprayed immediately, with a spraying amount of 0.3kg / m 2 30 minutes later, spray component B again with a spraying amount of 0.3kg / m 2 ;

[0051] S3: Component C is sprayed 24 hours after component B is sprayed, and the spraying amount is 0.35kg / m 210 minutes later, spray component C again with a spraying amount of 0.25kg / m 2 ;

[0052] S4, spray component D 4 hours after component C is sprayed, the spraying amount is 0.3kg / m 2 , dry naturally.

[0053] Example 2

[0054] A multi-component concrete surface enhancer comprises four components, wherein component A comprises a modified penetrant, fluorocarbon modified polyacrylate and C12-14 fatty alcohol in a mass ratio of 15:1.5:2, component B comprises hexamethyldisiloxane, magnesium cyclohexane, anhydrous ethanol and deionized water in a mass ratio of 1:1.5:6:12, component C comprises potassium trifluoroborate, a modified penetrant and water glass in a mass ratio of 4:2:1.5, and component D comprises isobutyl triethoxysilane, propylene glycol methyl ether acetate and sodium methyl silicate in a mass ratio of 1.5:2:12.

[0055] The preparation method of the modified penetrant comprises the following steps:

[0056] 1) adding isooctyl alcohol polyoxyethylene ether to water, the mass ratio of isooctyl alcohol polyoxyethylene ether to water being 1:2.5, then adding alcohol ether phosphate dropwise thereto under heating at 65° C. and stirring at 1000 r / min, the mass ratio of alcohol ether phosphate to isooctyl alcohol polyoxyethylene ether being 1:1.2, the alcohol ether phosphate being added dropwise over 35 min, and heating and stirring being continued for 4 min after the addition being completed, to obtain solution a;

[0057] 2) mixing hexamethyldisiloxane and 2 mol / L hydrochloric acid in a mass ratio of 3:1, and then stirring at 600 r / min for 35 min at 35° C. to obtain solution b;

[0058] 3) Solution a and solution b are simultaneously added dropwise to a three-necked flask, the mass ratio of solution a to solution b is 2.5:1, and the addition of solution a and solution b is controlled to be completed within 25 min, and then stirred at 900 r / min for 60 min at a temperature of 45° C. for reaction. After the reaction is completed, it is naturally cooled, and the pH value of the product is adjusted to 7 with a sodium hydroxide solution with a mass fraction of 40%, to obtain a modified penetrant.

[0059] The application method of the above-mentioned multi-component concrete surface enhancer comprises the following steps:

[0060] S1: Clean the concrete surface and spray component A with a spraying amount of 0.15kg / m 2 20 minutes later, spray component A again, with a spraying amount of 0.45kg / m 2 ;

[0061] S2: After spraying component A, component B is sprayed immediately, with a spraying amount of 0.35kg / m 2 30 minutes later, spray component B again with a spraying amount of 0.3kg / m 2 ;

[0062] S3: Component C is sprayed 24 hours after component B is sprayed, and the spraying amount is 0.4kg / m 2 10 minutes later, spray component C again with a spraying amount of 0.2kg / m 2 ;

[0063] S4, spray component D 4 hours after component C is sprayed, the spraying amount is 0.35kg / m 2 , dry naturally.

[0064] Example 3

[0065] A multi-component concrete surface enhancer comprises four components, wherein component A comprises a modified penetrant, fluorocarbon modified polyacrylate and C12-14 fatty alcohol in a mass ratio of 15:2:1, component B comprises propyltrimethoxysilane, magnesium cyclohexaneate, anhydrous ethanol and deionized water in a mass ratio of 1.4:1:5:12, component C comprises potassium trifluoroborate, a modified penetrant and water glass in a mass ratio of 4:1.5:1, and component D comprises isobutyltriethoxysilane, propylene glycol butyl ether and sodium methyl silicate in a mass ratio of 1:3:12.

[0066] The preparation method of the modified penetrant comprises the following steps:

[0067] 1) adding isooctyl alcohol polyoxyethylene ether to water in a mass ratio of 1:3, then adding alcohol ether phosphate dropwise thereto under heating at 70° C. and stirring at 1200 r / min, in a mass ratio of 1:1.5, the alcohol ether phosphate was added dropwise over 40 min, and heating and stirring were continued for 5 min after the addition was completed to obtain solution a;

[0068] 2) mixing hexamethyldisiloxane and 3 mol / L hydrochloric acid in a mass ratio of hexamethyldisiloxane to hydrochloric acid of 3:1, and then stirring at 800 r / min for 40 min at 35° C. to obtain solution b;

[0069] 3) Solution a and solution b are simultaneously added dropwise to a three-necked flask, the mass ratio of solution a to solution b is 3:1, and the addition of solution a and solution b is controlled to be completed within 30 min, and then stirred at 50° C. and 1000 r / min for 60 min for reaction. After the reaction is completed, it is naturally cooled, and the pH of the product is adjusted to 8 with a sodium hydroxide solution with a mass fraction of 40%, to obtain a modified penetrant.

[0070] The application method of the above-mentioned multi-component concrete surface enhancer comprises the following steps:

[0071] S1: Clean the concrete surface and spray component A with a spraying amount of 0.2kg / m 2 20 minutes later, spray component A again with a spraying amount of 0.4kg / m 2 ;

[0072] S2: After spraying component A, component B is sprayed immediately, with a spraying amount of 0.35kg / m 2 40 minutes later, spray component B again with a spraying amount of 0.3kg / m 2 ;

[0073] S3: Component C is sprayed 48 hours after component B is sprayed, and the spraying amount is 0.35kg / m 2 15 minutes later, spray component C again with a spraying amount of 0.25kg / m 2 ;

[0074] S4, spray component D 6 hours after component C is sprayed, the spraying amount is 0.35kg / m 2 , dry naturally.

[0075] Comparative Example 1

[0076] The only difference between Comparative Example 1 and Example 1 is that neither the A component nor the C component includes a modified penetrant.

[0077] Comparative Example 2

[0078] The only difference between Comparative Example 2 and Example 1 is that component B does not include magnesium cyclopentaneate.

[0079] Comparative Example 3

[0080] The difference between Comparative Example 3 and Example 1 is that component C is potassium trifluoroborate, modified penetrant and water glass in a mass ratio of 2:1:2, that is, the amount of potassium trifluoroborate is reduced.

[0081] Comparative Example 4

[0082] The difference between Comparative Example 4 and Example 1 is that the application steps of the multi-component concrete surface enhancer are different. The specific steps are as follows:

[0083] S1. After cleaning the concrete surface, spray a mixture of component A and component B in a mass ratio of 0.2:0.3 at a spraying amount of 0.5kg / m 2 30 minutes later, spray again with a mixture of component A and component B in a mass ratio of 0.4:0.3, with a spraying amount of 0.7kg / m 2 ;

[0084] S2: Component C is sprayed 24 hours after component A and component B are sprayed. The spraying amount is 0.35kg / m 2 10 minutes later, spray component C again with a spraying amount of 0.25kg / m 2 ;

[0085] S4, spray component D 4 hours after component C is sprayed, the spraying amount is 0.3kg / m 2 , dry naturally.

[0086] Comparative Example 5

[0087] The difference between Comparative Example 5 and Example 1 is that the application steps of the multi-component concrete surface enhancer are different. The specific steps are as follows:

[0088] S1: Clean the concrete surface and spray component A with a spraying amount of 0.2kg / m 2 15 minutes later, spray component A again with a spraying amount of 0.4kg / m 2 ;

[0089] S2: After spraying component A, spray a mixture of component B and component C in a mass ratio of 0.3:0.35, with a spraying amount of 0.65kg / m 2 30 minutes later, spray the mixture of component B and component C in a mass ratio of 0.3:0.25 again, with a spraying amount of 0.55kg / m 2 ;

[0090] S3, spray component D 4 hours after component C is sprayed, the spraying amount is 0.3kg / m 2 , dry naturally.

[0091] Comparative Example 6

[0092] The difference between Comparative Example 6 and Example 1 is that the application steps of the multi-component concrete surface enhancer are different. The specific steps are as follows:

[0093] S1, mix component A, component B, component C and component D in a mass ratio of 0.6:0.6:0.6:0.3;

[0094] S2: Clean the concrete surface and spray the above mixture. The first spraying amount is 0.6kg / m 2 After an interval of 30 minutes, the second spraying amount is 0.6kg / m 2 After 24 hours, the third spraying amount is 0.6kg / m 2 After 4 hours, the third spraying amount is 0.3kg / m 2 , dry naturally.

[0095] The effects obtained in each embodiment and each comparative example were tested, wherein:

[0096] Rebound strength: Tested in accordance with JGJ / T 23-2001 "Technical Specification for Testing Concrete Compressive Strength by Rebound Method". Concrete specimens cured for 28 days were selected for blank, example and comparative examples. Blank was tested directly, while examples and comparative examples were tested 3 days after applying multi-component concrete surface enhancer on concrete specimens.

[0097] Abrasion resistance: Tested according to standard GB / T 16925-1997 "Test method for abrasion resistance of concrete and its products", the specimen size is 100mm×100mm×100mm, the blank example, embodiment and comparative example all use concrete specimens cured for 28 days, the blank example is directly tested, and the embodiment and comparative example are tested 3 days after applying the multi-component concrete surface enhancer on the concrete specimen.

[0098] Penetration depth of reinforcing agent: The test was conducted in accordance with the standard JTJ 275-2000 "Technical Specification for Anticorrosion of Concrete Structures in Seaport Engineering". The examples and comparative examples both used concrete specimens that had been cured for 28 days, and the test was conducted 3 days after the multi-component concrete surface enhancer was applied to the concrete specimens.

[0099] Chloride ion diffusion coefficient: tested with reference to standard GB / T 50082-2009 "Standard for test methods of long-term performance and durability of ordinary concrete", the specimen size is 100 mm in diameter and 50 mm in height, the blank example, the embodiment and the comparative example all use concrete specimens cured for 28 days, the blank example is directly measured, and the embodiment and the comparative example are measured 90 days after applying the multi-component concrete surface enhancer on the concrete specimen.

[0100] Table 1

[0101]

[0102] As shown in Table 1, the multi-component concrete surface enhancer prepared in the embodiment has excellent permeability and sealing effect, and can effectively improve the surface rebound strength of concrete, and enhance the wear resistance, air tightness, impermeability and carbonization resistance of concrete. In Comparative Example 1, since no permeation enhancer is added, the penetration depth of the enhancer is low, so that the surface rebound strength is greatly reduced. Comparative Examples 2 to 3 lack magnesium cyclopentaneate and potassium trifluoroborate with permeability, which leads to a slight reduction in penetration depth and surface rebound strength. In Comparative Examples 4 to 6, some or all of the components are mixed before spraying, which will affect the penetration effect of the permeant, thereby reducing the rebound enhancement strength of the concrete.

[0103] The above embodiments are merely examples for clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above descriptions. It is not necessary and impossible to list all the implementation methods here, and the obvious changes or modifications derived therefrom are still within the protection scope of the invention.

Claims

1. A multi-component concrete surface enhancer, characterized in that: The invention comprises four components, wherein component A comprises a modified penetrant, fluorocarbon modified polyacrylate and C12-14 fatty alcohol in a mass ratio of 15:(1-2):(1-2); component B comprises a silane coupling agent, magnesium cyclohexaneate, ethanol and water in a mass ratio of (1-2):(1-2):(4-6):12; component C comprises potassium trifluoroborate, a modified penetrant and water glass in a mass ratio of 4:(1-2):(1-2); and component D comprises isobutyl triethoxysilane, a film-forming aid and sodium methyl silicate in a mass ratio of (1-2):(1-3):

12.

2. The multi-component concrete surface enhancer according to claim 1, characterized in that: The preparation method of the modified penetrant comprises the following steps: 1) adding isooctyl alcohol polyoxyethylene ether to water, and then adding alcohol ether phosphate dropwise thereto under heating and stirring conditions to prepare solution a; 2) mixing hexamethyldisiloxane and hydrochloric acid, heating and stirring to obtain solution b; 3) Add solution a and solution b to the reaction container simultaneously, then heat and stir to react, cool after the reaction, and adjust the pH of the product to 7-8 with an alkaline solution to obtain a modified penetrant.

3. The multi-component concrete surface enhancer according to claim 2, characterized in that: In step 1), the mass ratio of the polyoxyethylene isooctanol ether to water is 1:(2-3), and the mass ratio of the alcohol ether phosphate to the polyoxyethylene isooctanol ether is 1:(1-1.5).

4. The multi-component concrete surface enhancer according to claim 2, characterized in that: In step 1), the heating temperature of the heating and stirring is 60-70° C., and the stirring rate is 800-1200 r / min; the alcohol ether phosphate is added dropwise in 30-40 min, and the heating and stirring are continued for 3-5 min after the addition is completed.

5. The multi-component concrete surface enhancer according to claim 2, characterized in that: In step 2), the mass ratio of hexamethyldisiloxane to hydrochloric acid is (3-4):1, the concentration of hydrochloric acid is 2-3 mol / L, the heating and stirring time is 30-40 min, the heating temperature is 30-40° C., and the stirring rate is 500-800 r / min.

6. The multi-component concrete surface enhancer according to claim 2, characterized in that: In step 3), the mass ratio of solution a to solution b is (2-3):1, the dropwise addition of solution a and solution b is controlled within 20-30 min, the heating and stirring time is 40-60 min, the heating temperature is 45-50° C., and the stirring rate is 800-1000 r / min.

7. The multi-component concrete surface enhancer according to claim 1, characterized in that: The fluorocarbon modified polyacrylate is BASF EFKA FL 3772; the modulus of the water glass is 1.5-1.7; and the film-forming aid is an ether alcohol polymer.

8. The multi-component concrete surface enhancer according to claim 1, characterized in that: The silane coupling agent is one or more of hexamethyldisiloxane, vinyltriethoxysilane, and propyltrimethoxysilane; the film-forming aid is one or two of propylene glycol butyl ether and propylene glycol methyl ether acetate.

9. A method for applying the multi-component concrete surface enhancer according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1, clean the concrete surface and spray component A twice with an interval of 15 to 20 minutes; S2, spray component B immediately after component A is sprayed, spray twice, with an interval of 30 to 40 minutes; S3, spray component C 24 to 48 hours after component B is sprayed, spray twice, with an interval of 10 to 15 minutes; S4, spray component D 4 to 6 hours after component C is sprayed, spray once and let dry naturally.

10. The application method of the multi-component concrete surface enhancer according to claim 9, characterized in that: The spraying amount of component A is: 0.15~0.2kg / m 2 , the second time 0.4~0.5kg / m 2 ; The spraying amount of component B is: 0.3~0.35kg / m 2 , the second time 0.3~0.35kg / m 2 ; The spraying amount of component C is: 0.3-0.4kg / m 2 , the second time 0.2~0.25kg / m 2 ; The spraying amount of component D is 0.3-0.4 kg / m 2 .

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