CONCRETE GROUT REINFORCEMENT AND METHOD OF PREPARING IT

Abstract

This application pertains to the technical field of functional polymeric materials, and specifically relates to a concrete grout reinforcement, its preparation method, and its use. The concrete grout reinforcement of this application is a grafted epoxy copolymer concrete grout reinforcement containing multifunctional groups, wherein the main agent is a submicron grafted multifunctional resin with a particle size of 0.05–0.25 µm. A silanol structural unit of the main agent has excellent permeability to the grout and the interior of the concrete, which couples with OH on the surface to enhance the strength of a grout substrate and improve the tensile cohesive strength of the concrete grout on the surface. The construction coating also has good strength when the grout does not require polishing in engineering applications.The reinforcement has good wettability adhesion to the concrete substrate and a subsequent coating; the adhesive strength of the paired protective coating is ≥ 1.5 MPa. Meanwhile, the reinforcement is a thermoset coating film obtained through crosslinking, which improves heat resistance, thermal creep resistance, and can meet the coating's resistance requirement at temperatures up to 120°C for 200 hours through improved heat resistance.

Description

CONCRETE GROUT REINFORCEMENT AND METHOD OF PREPARATION AND USE THEREOF CROSS REFERENCE TO RELATED APPLICATIONS

[0001] The present application claims priority from Chinese Patent Application No. 202111204874.5, entitled concrete grout reinforcement and method of preparation thereof and use thereof, and filed with the National Intellectual Property Administration of China on October 15, 2021, the full content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] The present application belongs to the technical field of functional polymeric material, and particularly relates to a concrete grout reinforcement and method of preparation thereof and use thereof. BACKGROUND

[0003] Concrete grout is a soft layer material that floats on the surface of concrete, caused by bleeding as the cement hardens. The strength of the grout is much lower than that of the concrete itself. For construction coatings to adhere well to the concrete surface in engineering applications, the grout must be polished to a clean finish. Grout polishing is labor-intensive but inefficient, significantly reducing the overall efficiency of the coating installation. To reduce the amount of grout polishing required, or even to eliminate the need for a completely unpolished construction coating, a common solution is to use concrete surface treatment agents or interface agents to treat and strengthen the concrete grout.

[0004] In the prior art, thermoplastic copolymer emulsions or silane surface treatment agents are generally used to treat the 1998494 of 17 concrete surface. Silane can penetrate the surface of the grout structure and penetrate the interior of the concrete to make the grout denser and enhance the cohesive strength of the grout and the concrete body; the copolymer emulsion has excellent permeability and can completely infiltrate the surface of the wall's base material, making the base denser through the combination of glue, improving the adhesion between the interface and increasing the bonding strength of the wall surface.

[0005] However, after treatment with the silane surface treatment agent, the concrete surface becomes hydrophobic, reducing the ability to wet between layers and making subsequent coatings prone to poor adhesion, with interlayer adhesion < 1.5 MPa. Meanwhile, the copolymer emulsion is thermoplastic and has low heat resistance. Therefore, changes in temperature will cause shrinkage and creep, which does not meet the requirements for certain high-temperature applications. For example, coatings used in nuclear shielding require a temperature resistance of 120°C. SUMMARY

[0006] Therefore, the technical problem to be solved by the present application is to overcome the defects of the prior art that concrete surface treatment agents have low interlayer adhesion, low heat resistance, etc., thereby providing a concrete grout reinforcement and a method of preparing and using it.

[0007] For this purpose, the present application offers the following technical solutions:

[0008] The present application provides a concrete grout reinforcement, comprising 75-80 parts by mass of a main agent and 20-25 parts by mass of a curing agent. 1998494 of 17

[0009] The main agent comprises structural units of an epoxy silane monomer, a silanol monomer, and a silicone-acrylate graft copolymer.

[0010] Optionally, the mass ratio of silane epoxy monomer, silanol monomer and silicone-acrylate graft copolymer is (8-30): (5-20):100.

[0011] Optionally, the silanol monomer is at least one of vinyltrimethoxysilane hydrolysate, vinyltriethoxysilane hydrolysate, trimethoxymethylsilane hydrolysate, and triethoxymethylsilane hydrolysate.

[0012] Optionally, the silicone-acrylate graft copolymer is an organosilicon-acrylate graft copolymer emulsion, which may be a commercially available product or may be obtained by self-manufacture.

[0013] Optionally, the silicone-acrylate graft copolymer comprises 0.4-2.5 wt% of an organosilicon functional monomer, optionally 0.5-1.3 wt%.

[0014] Optionally, the organosilicon acrylate graft copolymer emulsion has a particle size of 0.03-0.2 μm, optionally 0.05-0.15 μm.

[0015] Optionally, the organosilicon acrylate graft copolymer emulsion has a minimum film-forming temperature (MFT) of 20-30 °C.

[0016] Optionally, the silane epoxy monomer is at least one of y-(2,3-epoxypropoxy)propyltrimethoxysilane, y-(2,3-epoxypropoxy)propyltriethoxysilane, y-(2,3-epoxypropoxy)propylmethyldimethoxysilane, y-(2,3-epoxypropoxy)propylmethyldiethoxysilane, β-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, β-(3,4-epoxycyclohexyl)ethyltriethoxysilane.

[0017] Optionally, the curing agent is at least one of the alicyclic amine curing agents, polyamide curing agent, phenolic amine aldehyde curing agent, or polythiol curing agent. 1998494 of 17

[0018] The specific selection of the curing agent can be from conventional commercial products, for example, the alicyclic amine is Beckocure EH623W or Beckocure EH659W.

[0019] The polyamide is Aradur435 or Aradur340.

[0020] The phenolic amine aldehyde is 5034W.

[0021] The polythiol is QE-340M, Thioplast G4 or GL1830.

[0022] The present application also provides a method of preparing the above concrete grout reinforcement, comprising the following steps:

[0023] mixing the silicone-acrylate graft copolymer, silanol monomer and silane epoxy monomer with water, and performing the condensation reaction at 50-65 °C for 1-2 h to obtain the main agent;

[0024] Pack the main agent and the curing agent separately in proportion to obtain a concrete grout reinforcement.

[0025] Optionally, the mass ratio of silicone-acrylate graft copolymer, silanol monomer, silane epoxy monomer in water is 100:(5-20):(8-30):(50-70).

[0026] Optionally, the method of preparing the silanol monomer is: heat a solvent to 55-65 °C, add silane drop by drop with stirring, ensuring that the silane drip time is 3-4 h, and maintain the temperature at 60-65 °C for 3-4 h to obtain the silanol monomer.

[0027] Optionally, the solvent is a mixture of ethanol, water and ammonia, and the mass ratio of ethanol, water and ammonia is (20-35):(80-65):(0.08-0.2);

[0028] Optionally, the mass ratio of solvent to silane is 10: (1-5).

[0029] Specifically, the method of preparing silanol monomer is: adding dosed ethanol / water / ammonia (20-35 / 80-65 / 0.08-0.2) into a reactor with stirring, thermocouple and dropper device, heating the reactor to 55-65 °C, then adding silanol drop by drop and controlling the material to be added to the reactor at 3-4 hours, and maintaining the temperature at 60-65 °C for 3-4 h to obtain a silanol sol. 1998494 of 17

[0030] This application also provides for the use of concrete grout reinforcement or concrete grout reinforcement prepared by the preparation method, wherein the main agent and the curing agent are uniformly mixed in proportion and coated over the surface of the concrete and then cured at ambient temperature during construction.

[0031] The technical solution of the present application has the following advantages:

[0032] The concrete grout reinforcement provided by the present application comprises 75-80 parts by mass of a main agent and 20-25 parts by mass of a curing agent; wherein the main agent comprises structural units of an epoxy silane monomer, a silanol monomer, and a silicone-acrylate graft copolymer. The concrete grout reinforcement of the present application is a graft copolymerization of epoxy concrete grout reinforcement containing multifunctional groups, wherein the main agent is a submicron grafted multifunctional resin having a particle size of 0.05-0.2 μm, and a silanol structural unit of the main agent has excellent permeability to the grout and the interior of the concrete.which couples with OH on the surface to improve the strength of a grout substrate and enhance the tensile cohesion of the concrete grout on the surface. The construction coating also has good strength when the grout does not need to be polished in engineering applications. The reinforcement has good wetting adhesion to the concrete substrate and a subsequent coating. The adhesive strength of the paired protective coating is > 1.5 MPa. Meanwhile, the reinforcement is a thermosetting coating film obtained through crosslinking of the main agent with the curing agent, which improves the heat resistance, creep resistance, and heat resistance of the reinforcement, and can meet the temperature resistance requirement of the coating at 120 °C for 200 h.

[0033] The concrete grout reinforcement provided herein Application 1998494 of 17 states that the silanol monomer is at least one of vinyltrimethoxysilane hydrolysate, vinyltriethoxysilane hydrolysate, trimethoxymethylsilane hydrolysate, and triethoxymethylsilane hydrolysate. The hydrolysate has the advantages of deep penetration into the grout and good grout wettability, which can enhance the grout's cohesive strength.

[0034] The concrete grout reinforcement provided by the present application has the advantages of increasing the adhesion between the grout and the backing, forming a thermoset paint film and increasing heat resistance by further defining the silane epoxy monomer and the silicone-acrylate graft copolymer.

[0035] The concrete grout reinforcement provided by this application, wherein the curing agent is at least one of the following: alicyclic amine curing agent, polyamide curing agent, phenolic amine aldehyde curing agent, or polythiol curing agent. This application utilizes a primary amine or thiol curing agent to form a crosslinked thermoset coating film, enhance the heat resistance and temperature creep resistance of the treatment agent, and meet the requirements for use under high-temperature conditions of 120°C for 200 h (GB / T1735), thereby further improving the heat resistance of the reinforcement.

[0036] When using the concrete grout reinforcement provided by this application, in practical engineering applications, the grout does not need to be polished to a clean finish or even polished. The reinforcement is easy to use, either by spraying or rolling it onto the concrete surface and curing at room temperature. The construction material also has good strength, so the adhesion of the bonded protective coating is > 1.5 MPa (GB / T5210) to meet the requirements for use under high temperatures at 120°C for 200 h (GB / T1735). 1998494 of 17 DETAILED DESCRIPTION

[0037] The following embodiments are provided for a better understanding of this application, but the application is not limited to these embodiments, and these embodiments do not limit the content and scope of protection of this application. Any product identical or similar to the one in this application that is obtained by combining it with the features of another prior art will fall within the scope of protection of this application.

[0038] If the specific experimental steps or conditions are not indicated in the embodiments, they may be carried out in accordance with the operations or conditions of the conventional experimental steps mentioned in the references to the art. The agents or instruments used, without indicating the manufacturers, are all conventional products of agents that can be obtained on the market.

[0039] Implementation form 1

[0040] The present embodiment provides a method for preparing a concrete reinforcement, and the specific preparation method is as follows:

[0041] Preparation of silanol monomer: Add 100g of ethanol / water / ammonia (with a mass ratio of (30 / 70 / 0.1)) to a reactor with stirring, thermocouple and dripping device, heat the reactor to 55 °C, and add 30g of vinyl trimethoxysilane drop by drop and control the material to be added to the reactor at 3 h and the temperature at 60 °C, and maintain the temperature at 60 °C for 3.5 h after dripping to obtain a silanol sol, which is the silanol monomer.

[0042] 100 g of silicone-acrylate graft copolymer (RS-996KD, MFT22°C), 10 g of silanol monomer and 20 g of γ-(2,3-epoxypropoxy)propyltrimethoxysilane epoxy silane monomer are mixed with 65 g of water, and a condensation reaction is carried out at 62 °C for 1.5 h to obtain a main agent;

[0043] 77 g of the main agent and 23 g of the curing agent (Beckocure EH623W) are packaged separately in proportion to obtain a boost of 1998494 of 17 concrete grout.

[0044] Implementation form 2

[0045] The present embodiment provides a method for preparing a concrete reinforcement, and the specific preparation method is as follows:

[0046] Preparation of silanol monomer: Add 100 g of ethanol / water / ammonia (with a mass ratio of (30 / 70 / 0.1)) to a reactor with stirring, thermocouple and dripping device, heat the reactor to 60 °C, and add 25 g of vinyl trimethoxysilane dropwise and control the material to be added to the reactor within 3.5 h and the temperature to 65 °C, and maintain the temperature at 65 °C for 3.5 h after dripping to obtain a silanol sol.

[0047] 100 g of silicone-acrylate graft copolymer (RS-996KD, MFT22°C), 15 g of silanol monomer and 25 g of y-(2,3-epoxypropoxy)propyltrimethoxysilane epoxy silane monomer are mixed with 55 g of water, and a condensation reaction is carried out at 60 °C for 2 h to obtain a main agent;

[0048] 78 g of the main agent and 22 g of the curing agent (Beckocure EH623W) are packaged separately in proportion to obtain a concrete grout reinforcement.

[0049] Implementation method 3

[0050] The present embodiment provides a method for preparing a concrete reinforcement, and the specific preparation method is as follows:

[0051] Preparation of silanol monomer: Add 100 g of ethanol / water / ammonia (with a mass ratio of (30 / 70 / 0.1)) to a reactor with stirring, thermocouple and dripping device, heat the reactor to 55 °C, and add 30 g of vinyl trimethoxysilane drop by drop and control the material to be added to the reactor within 3 h and the temperature to 60 °C, and maintain the temperature at 60 °C for 4 h after dripping to obtain a silanol sol.

[0052] 100 g of silicone-acrylate graft copolymer (RS-996KD, MFT22°C), 5 g of silanol monomer and 30 g of y-(2,3-epoxypropoxy)propyltrimethoxysilane epoxy silane monomer are mixed with 70 g of water, and a 1998494 of 17 condensation reaction at 50 °C for 2 h to obtain a main agent;

[0053] 75 g of the main agent and 25 g of the curing agent (Beckocure EH623W) are packaged separately in proportion to obtain a concrete grout reinforcement.

[0054] Implementation form 4

[0055] The present embodiment provides a method for preparing a concrete reinforcement, and the specific preparation method is as follows:

[0056] Preparation of silanol monomer: Add 100 g of ethanol / water / ammonia (with a mass ratio of (30 / 70 / 0.1)) to a reactor with stirring, thermocouple and dripping device, heat the reactor to 65 °C, and add 25 g of vinyl trimethoxysilane dropwise and control the material to be added to the reactor within 4 h and the temperature at 65 °C, and maintain the temperature at 65 °C for 3.0 h after dripping to obtain a silanol sol.

[0057] 100 g of silicone-acrylate graft copolymer (RS-996KD, MFT22°C), 20 g of silanol monomer and 8 g of y-(2,3-epoxypropoxy)propyltrimethoxysilane epoxy silane monomer are mixed with 50 g of water, and a condensation reaction is carried out at 65 °C for 1 h to obtain a main agent;

[0058] 80 g of the main agent and 20 g of the curing agent (Beckocure EH623W) are packaged separately in proportion to obtain a concrete grout reinforcement.

[0059] Implementation form 5

[0060] The present embodiment provides a method for preparing a concrete reinforcement, and the specific preparation method is as follows:

[0061] 100 g of silicone-acrylate graft copolymer (RS-996KD, MFT22°C), 10 g of silanol monomer (Bindzil CC30) and 20 g of y-(2,3-epoxypropoxy)propyltrimethoxysilane epoxy silane monomer are mixed with 65 g of water, and a condensation reaction is carried out at 60 °C for 1.5 h to obtain a main agent;

[0062] 77 g of the main agent and 23 g of the curing agent (Beckocure 1998494 of 17 EH623W) are packaged separately in proportion to obtain a concrete grout reinforcement.

[0063] Implementation form 6

[0064] The present embodiment provides a method for preparing a concrete reinforcement, and the specific preparation method is as follows:

[0065] Preparation of silanol monomer: Add 100 g of ethanol / water / ammonia (with a mass ratio of (30 / 70 / 0.1)) to a reactor with stirring, thermocouple and dripping device, heat the reactor to 60 °C, and add 30 g of vinyl trimethoxysilane dropwise and control the material to be added to the reactor within 3 h and the temperature at 60 °C, and maintain the temperature at 60 °C for 3.0 h after dripping to obtain a silanol sol.

[0066] 100 g of silicone-acrylate graft copolymer (RS-996KD, MFT22°C), 10 g of silanol monomer and 20 g of y-(2,3-epoxypropoxy)propyltrimethoxysilane epoxy silane monomer are mixed with 65 g of water, and a condensation reaction is carried out at 62°C for 1.5 h to obtain a main agent;

[0067] 77 g of the main agent and 23 g of the curing agent (Aradur435) are packaged separately in proportion to obtain a concrete grout reinforcement.

[0068] Implementation form 7

[0069] The present embodiment provides a method for preparing a concrete reinforcement, and the specific preparation method is as follows:

[0070] Preparation of silanol monomer: Add 100 g of ethanol / water / ammonia (with a mass ratio of (30 / 70 / 0.1)) to a reactor with stirring, thermocouple and dripping device, heat the reactor to 55 °C, and add 30 g of vinyl trimethoxysilane dropwise and control the material to be added to the reactor within 3 h and the temperature to 60 °C, and maintain the temperature at 60 °C for 3.5 h after dripping to obtain a silanol sol.

[0071] 100 g of silicone-acrylate graft copolymer (RS-996KD, MFT22°C), 10 g of silanol monomer and 20 g of silane epoxy monomer are mixed 1998494 of 17 y-(2,3-epoxypropoxy)propyltrimethoxysilane with 65 g of water, and a condensation reaction is carried out at 62 °C for 1.5 h to obtain a main agent;

[0072] pack 77 g of the main agent and 23 g of the curing agent (Beckocure EH623W) separately in proportion to obtain a concrete grout reinforcement.

[0073] Implementation form 8

[0074] The present embodiment provides a method for preparing a concrete reinforcement, and the specific preparation method is as follows:

[0075] Preparation of silanol monomer: Add 100 g of ethanol / water / ammonia (with a mass ratio of (30 / 70 / 0.1)) to a reactor with stirring, thermocouple and dripping device, heat the reactor to 55 °C, and add 30 g of vinyl trimethoxysilane dropwise and control the material to be added to the reactor within 3 h and the temperature to 60 °C, and maintain the temperature at 60 °C for 3.5 h after dripping to obtain a silanol sol.

[0076] 100 g of silicone-acrylate graft copolymer (BLJ KD96, MFT22°C), 10 g of silanol monomer and 20 g of y-(2,3-epoxypropoxy)propyltrimethoxysilane epoxy silane monomer are mixed with 65 g of water, and a condensation reaction is carried out at 62°C for 1.5 h to obtain a main agent;

[0077] 77 g of the main agent and 23 g of the curing agent (Beckocure EH623W) are packaged separately in proportion to obtain a concrete grout reinforcement.

[0078] Implementation form 9

[0079] The present embodiment provides a method for preparing a concrete reinforcement, and the specific preparation method is as follows:

[0080] Preparation of silanol monomer: Add 100 g of ethanol / water / ammonia (with a mass ratio of (30 / 70 / 0.1)) to a reactor with stirring, thermocouple and dropper device, heat the reactor to 55 °C, and add 30 g of vinyl trimethoxysilane drop by drop and control the material to be added to the reactor within 3 h and the temperature to 60 °C, and maintain the temperature at 60 °C for 1998494 of 17 3.5 h after dripping to obtain a silanol sol.

[0081] 100 g of silicone-acrylate graft copolymer (RS-996KD, MFT22°C), 10 g of silanol monomer and 20 g of y-(2,3-epoxypropoxy)propyltrimethoxysilane epoxy silane monomer are mixed with 65 g of water, and a condensation reaction is carried out at 62 °C for 1.5 h to obtain a main agent;

[0082] 77 g of the main agent and 23 g of the curing agent (Beckocure EH623W) are packaged separately in proportion to obtain a concrete grout reinforcement.

[0083] Implementation form 10

[0084] The present embodiment provides a method for preparing a concrete reinforcement, and the specific preparation method is as follows:

[0085] Preparation of silanol monomer: Add 100 g of ethanol / water / ammonia (with a mass ratio of (30 / 70 / 0.1)) to a reactor with stirring, thermocouple and dripping device, heat the reactor to 55 °C, and add 30 g of vinyl trimethoxysilane dropwise and control the material to be added to the reactor within 3 h and the temperature to 60 °C, and maintain the temperature at 60 °C for 3.5 h after dripping to obtain a silanol sol.

[0086] 100 g of silicone-acrylate graft copolymer (BATF RS-7801, MFT16°C, particle size 0.2-0.3 μm), 10 g of silanol monomer and 20 g of y-(2,3-epoxypropoxy)propyltrimethoxysilane epoxy silane monomer are mixed with 65 g of water, and a condensation reaction is carried out at 65 °C for 1.5 h to obtain a main agent;

[0087] 75 g of the main agent and 25 g of the curing agent (Beckocure EH623W) are packaged separately in proportion to obtain a concrete grout reinforcement.

[0088] Comparative realization form 1

[0089] The present comparative embodiment provides a method of preparing a concrete reinforcement, and the specific preparation method is as follows: 1998494 of 17

[0090] Preparation of silanol monomer: Add 100 g of ethanol / water / ammonia (with a mass ratio of (30 / 70 / 0.1)) to a reactor with stirring, thermocouple and drip device, heat the reactor to 55 °C, and add 30 g of vinyl trimethoxysilane drop by drop and control the material to be added to the reactor within 3 h and the temperature to 60 °C, and maintain the temperature at 60 °C for 3.5 h after dripping to obtain a silanol sol.

[0091] 100 g of styrene acrylic copolymer (Primal DC-420, MFT29°C), 10 g of silanol monomer and 20 g of y-(2,3-epoxypropoxy propyltrimethoxysilane epoxy silane monomer are mixed with 65 g of water, and a condensation reaction is carried out at 62 °C for 1.5 h to obtain a main agent;

[0092] 77 g of the main agent and 23 g of curing agent (Beckocure EH623W) are packaged separately in proportion to obtain a concrete grout reinforcement.

[0093] Comparative realization form 2

[0094] The present comparative embodiment provides a method of preparing a concrete reinforcement, and the specific preparation method is as follows:

[0095] Preparation of silanol monomer: Add 100 g of ethanol / water / ammonia (with a mass ratio of (30 / 70 / 0.1)) to a reactor with stirring, thermocouple and drip device, heat the reactor to 55 °C, and add 30 g of tetraethyl orthosilicate drop by drop and control the material to be added to the reactor within 3 h and the temperature to 60 °C, and maintain the temperature at 60 °C for 3.5 h after dripping to obtain a silanol sol.

[0096] 100 g of silicone-acrylate graft copolymer (RS-996KD, MFT22°C), 10 g of silanol monomer and 20 g of y-(2,3-epoxypropoxy)propyltrimethoxysilane epoxy silane monomer are mixed with 65 g of water, and a condensation reaction is carried out at 62 °C for 1.5 h to obtain a main agent;

[0097] 77 g of the main agent and 23 g of the curing agent (Beckocure EH623W) are packaged separately in proportion to obtain a boost of 1998494 of 17 concrete grout.

[0098] Comparative realization form 3

[0099] The present comparative embodiment provides a method of preparing a concrete reinforcement, and the specific preparation method is as follows:

[00100] Preparation of silanol monomer: Add 100 g of ethanol / water / ammonia (with a mass ratio of (30 / 70 / 0.1)) to a reactor with stirring, thermocouple and drip device, heat the reactor to 55 °C, and add 30 g of vinyl trimethoxysilane drop by drop and control the material to be added to the reactor within 3 h and the temperature to 60 °C, and maintain the temperature at 60 °C for 3.5 h after dripping to obtain a silanol sol.

[00101] 100 g of silicone-acrylate graft copolymer (RS-996KD, MFT22°C), 10 g of silanol monomer and 20 g of y-(2,3-epoxypropoxy)propyltrimethoxysilane epoxy silane monomer are mixed with 65 g of water, and a condensation reaction is carried out at 62 °C for 1.5 h to obtain a main agent;

[00102] 70g of the main agent and 30g of the curing agent (Beckocure EH623W) are packaged separately in proportion to obtain a concrete grout reinforcement.

[00103] Experimental implementation method

[00104] The particle size of the main reinforcing agent in the prepared concrete grout, in the embodiments and comparative embodiments of this application, is measured using a BT-9300ST laser particle size distribution analyzer. The specific concrete composition is the GB8076 reference concrete pouring block (70x70x20mm), which is cured for 28 days as required. After simply removing surface contaminants with 50-grit sandpaper from the surface of the concrete block, the reinforcement is sprayed onto its surface at a rate of 50 g / m². The subsequent coating is then sprayed with a quantity 1998494 of 17 spray coatings of 250 g / m², and the subsequent coating consists of a two-component, water-based epoxy coating. After curing at room temperature for 14 days, the adhesion of the intermediate layer is tested according to GB / T5210, and the temperature resistance performance (120 °C, 200 h) is tested according to GB / T1735. The specific test results are as follows: Table 1 main agent particle size / D90 interlayer adhesion / MPa temperature resistance performance (120 °C, 200 h) Embodiment 1 0.23 1.95 cracking level 0, blistering level 0, peeling level 0 Embodiment 2 0.20 1.80 cracking level 0, blistering level 0, peeling level 0 Embodiment 3 0.17 2.05 cracking level 0, blistering level 0, peeling level 0 Embodiment 4 0.24 2.00 cracking level 0, blistering level 0, peeling level 0 Embodiment 5 0.13 1.45 cracking level 0, blistering level 0, peeling level 0 Embodiment 6 0.20 1.90 cracking level 0, level blistering level 0, peeling level 0 Embodiment 7 0.15 2.05 cracking level 0, blistering level 0, peeling level 0 Embodiment 8 0.10 1.70 cracking level 0, blistering level 0, peeling level 0 Embodiment 9 0.18 1.90 cracking level 0, blistering level 0,level of desquamation 0 Form of realization 10 0.25 1.85 level of fissuring 1, level of blistering 1, level of desquamation 0 Form of 0.35 1.60 level of fissuring 1, level of, 1998494 of 17 Comparative realization 1 blistering 2, desquamation level 0 Comparative realization form 2 0.30 1.40 fissuring level 1, blistering level 0, desquamation level 1 Comparative realization form 3 0.18 1.90 fissuring level 1, blistering level 1, desquamation level 0

[00105] It can be observed from the data in the table that graft copolymerization of concrete epoxy grout reinforcement containing multifunctional groups according to the present application can penetrate the grout 5 of the simply polished concrete surface, improve the strength of the grout layer and make it produce good adhesion (>1.5 MPa) with the subsequent coating and temperature resistance performance (120 °C, 200 h, the paint film has a cracking level of 0, a blistering level of 0 and a peeling level of 0).

[00106] Obviously, the embodiments mentioned above are merely examples for clarity and are not intended to limit the form of implementation. For those skilled in the art, changes or modifications to other embodiments may also be made based on the above description. It is neither necessary nor possible to be exhaustive with all the embodiments presented here. However, any obvious changes or modifications resulting therefrom remain within the scope of protection of this application. 1998494 of 17 ALICIA GRACIELA ALVAREZ - 27109868332 Digitally signed by PORTALTRAMITES - INPI Date: 2022.10.14 13:55:54 -03:00 Reason: Digitally Signed by INPI Location: Buenos Aires, Argentina 1998494

Claims

1. A concrete grout reinforcement, characterized in that it comprises 75 to 80 parts by mass of a main agent and 20 to 25 parts by mass of a curing agent, wherein the main agent comprises an epoxy silane monomer, a silanol monomer and a silicone-acrylate graft copolymer; and the mass ratio of the epoxy silane monomer, the silanol monomer and the silicone-acrylate graft copolymer is (8 - 30):(5 - 20):100; the epoxy silane monomer is at least one of γ-(2,3-epoxypropoxy)propyltrimethoxysilane, γ-(2,3-epoxypropoxy)propyltriethoxysilane, γ-(2,3-epoxypropoxy)propylmethyldimethoxysilane, γ-(2,3-epoxypropoxy)propylmethyldiethoxysilane, β-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, β-(3,4-epoxycyclohexyl)ethyltriethoxysilane; the silanol monomer is at least one of vinyltrimethoxysilane hydrolysate, vinyltriethoxysilane hydrolysate, trimethoxymethylsilane hydrolysate, and triethoxymethylsilane hydrolysate;and the silicone-acrylate graft copolymer is an organosilicon-acrylate graft copolymer emulsion having a particle size of 0.03 to 0.2 µm, and a minimum film-forming temperature (MFT) of 20 to 30°C; and wherein the curing agent is at least one of the alicyclic amine curing agents, polyamide curing agent, phenolic amine aldehyde curing agent, or polythiol curing agent. Five claims follow;