Surface treating agent as well as preparation method and application thereof

Abstract

The invention discloses a surface treating agent as well as a preparation method and application thereof, and the surface treating agent is prepared from the following raw materials in parts by weight: 10-40 parts of micron-sized carborundum and 60-90 parts of an organic treating agent, the organic treating agent is prepared from the following raw materials: a silane coupling agent and a surfactant; the silane coupling agent is prepared from at least one of isobutyl triethoxy silane, methyl triethoxy silane, allyl triethoxy silane and butyl acrylate triethoxy silane; the silane coupling agent is prepared from at least one of isobutyl triethoxy silane, methyl triethoxy silane, allyl triethoxy silane and butyl acrylate triethoxy silane; the surfactant is prepared from at least one of sodium dodecyl benzene sulfonate, gamma-aminopropyl trimethoxy silane, epoxy propenyl trimethoxy silane and methyl trimethoxy silane. According to the surface treating agent provided by the invention, the surface treating agent is sprayed to the surface of concrete, so that the wear resistance and cracking resistance of the surface of the concrete are enhanced, a large amount of surface treating agent is saved, and the cost of the concrete is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of concrete, and in particular relates to a surface treatment agent and a preparation method and application thereof. Background Art

[0002] Concrete is a composite material made of gel material, aggregate and water in appropriate proportions, which is mixed and formed, and then hardened after a period of time. Concrete is still the preferred material for overlay in current airport pavements, but concrete has limited bending, tensile, wear and crack resistance. Civil aircraft are heavy and fast, so the impact force on the surface of concrete pavements is very large, which can easily cause breakage, cracking, severe surface wear and other situations that affect aircraft safety.

[0003] Therefore, there is an urgent need for a surface treatment agent to improve the wear resistance of airport pavement. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the above-mentioned prior art. To this end, the present invention proposes a surface treatment agent, which is sprayed onto the concrete surface in the solution of the present invention, thereby enhancing the wear resistance of the concrete surface and saving a large amount of surface treatment agent.

[0005] The invention also provides a method for preparing the surface treatment agent.

[0006] The invention also proposes the application of the surface treatment agent in concrete pavement.

[0007] According to one aspect of the present invention, a surface treatment agent is provided. The raw materials for preparation include, by weight: 10 to 40 parts of micron-grade corundum and 60 to 90 parts of an organic treatment agent;

[0008] The raw materials for preparing the organic treatment agent include: a silane coupling agent and a surfactant;

[0009] The silane coupling agent includes at least one of methyltriethoxysilane, acryltriethoxysilane and butyl acrylate triethoxysilane;

[0010] The surfactant includes at least one of γ-aminopropyltrimethoxysilane, epoxypropylenetrimethoxysilane and methyltrimethoxysilane.

[0011] The embodiments according to the first aspect of the present invention have at least the following beneficial effects:

[0012] The surface treatment agent of the present invention contains both an organic treatment agent and micron-grade corundum, wherein the methyltriethoxysilane in the organic treatment agent reacts with the hydrated cement after passing through the capillary wall of the concrete and forms a silane interpenetrating network structure, which gives the concrete surface tension through a strong chemical bonding reaction, thereby effectively improving the surface wear resistance of the concrete; the micron-grade corundum increases the sand ratio of the concrete surface, and within a certain range, when the sand ratio increases, that is, when the fine aggregate increases, the wear resistance of the surface will be significantly improved, and the wear resistance of corundum is much greater than that of ordinary machine-made sand or river sand, and at the same time, the micron-grade corundum can be filled into the pores of the hydration product, making the structure of the cement stone more compact. The scheme of the present invention combines the organic treatment agent with the micron-grade corundum, so that the surface treatment agent has both chemical treatment and physical filling functions, and has better performance than the single surface treatment agent used on the market. The scheme of the present invention sprays the surface treatment agent evenly on the concrete surface, thereby enhancing the wear resistance of the concrete surface.

[0013] In some embodiments of the present invention, the raw materials for preparing the surface treatment agent include, by weight: 30 to 40 parts of micron-grade corundum and 60 to 70 parts of an organic treatment agent;

[0014] The raw materials for preparing the organic treatment agent include: a silane coupling agent and a surfactant;

[0015] The silane coupling agent includes at least one of methyltriethoxysilane, acryltriethoxysilane and butyl acrylate triethoxysilane;

[0016] The surfactant includes at least one of γ-aminopropyltrimethoxysilane, epoxypropylenetrimethoxysilane and methyltrimethoxysilane.

[0017] In some embodiments of the present invention, the raw materials for preparing the organic treatment agent further include a solvent;

[0018] The solvent includes at least one of propylene glycol monobutyl ether, ethylene glycol and methyl chloride.

[0019] In some embodiments of the present invention, the micron-grade corundum is of grade F, and the particle size ranges from 50 μm to 150 μm.

[0020] In some embodiments of the present invention, the raw materials for preparing the organic treatment agent include, by weight: 20 to 30 parts of a silane coupling agent, 20 to 30 parts of a surfactant, and 60 to 80 parts of a solvent.

[0021] In some embodiments of the present invention, the raw materials for preparing the organic treatment agent further include polyethylene glycol distearate modified with hydroxyl groups.

[0022] According to an embodiment of the second aspect of the present invention, a method for preparing a surface treatment agent is provided, comprising the following steps:

[0023] S1: mixing and dispersing the surfactant and the silane coupling agent to obtain an organic treatment agent;

[0024] S2: Mix and disperse the micron-sized corundum and the organic treatment agent.

[0025] In some embodiments of the present invention, step S1 further comprises adding polyethylene glycol distearate modified with a hydroxyl group.

[0026] In some embodiments of the present invention, the method for preparing the polyethylene glycol distearate modified with a hydroxyl group comprises: dispersing and reacting a hydroxyl modifier and polyethylene glycol distearate.

[0027] The ester bond in polyethylene glycol distearate is dynamic in itself. The long carbon chain (stearic acid) can increase the flexibility and mobility of the ester bond, so that the ester bond can be relatively easily broken and reconnected when subjected to external force. At the same time, polyethylene glycol (PEG) is used as the main chain, with stearate groups connected at both ends. The PEG chain has a soft property, which is conducive to the partial breaking of the stearate ester bond under external stress, and then self-repair through the movement and recombination of the molecular chain. In concrete structures, when tiny cracks appear, the molecular chains of the polymer can break around the cracks and then reconnect after the force disappears or the conditions change, effectively repairing the cracks.

[0028] Introducing hydroxyl groups (-OH) into the molecular structure of polyethylene glycol distearate can enhance its interaction ability and permeability with concrete hydration substances. It improves the affinity and compatibility between the polymer and the aqueous medium (such as the hydration substances in concrete), thereby promoting its more effective penetration into the capillary pores and microcracks of the concrete. Micron-sized corundum directly participates in the volcanic ash reaction of cement, consumes calcium hydroxide produced by cement hydration, generates more hydrated calcium silicate gel, accelerates the hydration rate of tricalcium silicate, and can thus improve the degree of hydration, further promoting the polyethylene glycol distearate modified with hydroxyl groups to fill into the pores of the hydration product.

[0029] In some embodiments of the present invention, the raw materials for preparing the polyethylene glycol distearate modified with hydroxyl group further include a dispersant, and the dispersant includes propylene glycol monobutyl ether.

[0030] In some embodiments of the present invention, the hydroxyl modifying agent comprises hydroxyethyl acrylate.

[0031] In some embodiments of the present invention, the reaction temperature is 60-80°C.

[0032] According to an embodiment of the third aspect of the present invention, a use of a surface treatment agent in a concrete pavement is provided.

[0033] In some embodiments of the present invention, the concrete pavement comprises an airport pavement.

[0034] In some embodiments of the present invention, the applying includes spraying the surface treatment agent on the concrete surface.

[0035] In some embodiments of the present invention, the spraying amount is 5 to 20 g / m 2 . DETAILED DESCRIPTION

[0036] The words "preferably", "more preferably", etc. in the present invention refer to embodiments of the present invention that may provide certain beneficial effects in certain circumstances. However, other embodiments may also be preferred under the same circumstances or other circumstances. In addition, the description of one or more preferred embodiments does not imply that other embodiments are not applicable, nor is it intended to exclude other embodiments from the scope of the present invention.

[0037] When a numerical range is disclosed herein, the above range is considered to be continuous and includes the minimum and maximum values ​​of the range, as well as every value between such minimum and maximum values. Further, when a range refers to an integer, every integer between the minimum and maximum values ​​of the range is included. In addition, when multiple ranges are provided to describe features or characteristics, the ranges can be combined. In other words, unless otherwise indicated, all ranges disclosed herein should be understood to include any and all subranges included therein.

[0038] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of the present invention.

[0039] Unless otherwise specified, the reagents, methods and equipment used in the present invention are conventional reagents, methods and equipment in the art.

[0040] Example 1

[0041] This embodiment prepares an airport pavement concrete surface treatment agent with enhanced wear resistance, including the following components calculated by weight:

[0042] 70 parts of organic treatment agent, 30 parts of micron-grade corundum, the preparation steps of the surface treatment agent composed of the organic treatment agent and micron-grade corundum are as follows:

[0043] A1. Add 20 parts of γ-aminopropyltrimethoxysilane to 60 parts of propylene glycol monobutyl ether and stir to obtain an organic solvent;

[0044] A2. 10 parts of methyltriethoxysilane were added to the organic solvent and stirred to obtain an organic treatment agent;

[0045] A3. Add 30 parts of micron-grade corundum to 70 parts of the above organic treatment agent, and ultrasonically disperse it for 5 minutes to completely disperse it evenly to obtain the surface treatment agent.

[0046] After concrete is vibrated and before slurry is leveled, apply the above surface treatment agent at a rate of 15g / m 2 Spray evenly on the concrete surface.

[0047] Example 2

[0048] This embodiment prepares an airport pavement concrete surface treatment agent with enhanced wear resistance, including the following components calculated by weight:

[0049] The preparation steps of the surface treatment agent composed of organic treatment agent and micron-grade corundum are as follows:

[0050] A1. Add 20 parts of γ-aminopropyltrimethoxysilane to 60 parts of propylene glycol monobutyl ether and stir to obtain an organic solvent;

[0051] A2. 20 parts of methyltriethoxysilane were added to the organic solvent and stirred to obtain an organic treatment agent;

[0052] A3. Add 30 parts of micron-grade corundum to 70 parts of the above organic treatment agent, and ultrasonically disperse it for 5 minutes to completely disperse it evenly to obtain the surface treatment agent.

[0053] The specific preparation method and use method are the same as those in Example 1. After the concrete is vibrated and before the slurry is leveled, the surface treatment agent is applied at a concentration of 15 g / m 2 Spray evenly on the concrete surface.

[0054] Example 3

[0055] This embodiment prepares an airport pavement concrete surface treatment agent with enhanced wear resistance.

[0056] The preparation steps of the surface treatment agent composed of organic treatment agent and micron-grade corundum are as follows:

[0057] A1. Add 20 parts of γ-aminopropyltrimethoxysilane to 60 parts of propylene glycol monobutyl ether and stir to obtain an organic solvent;

[0058] A2. 30 parts of isomethyltriethoxysilane were added to the organic solvent and stirred to obtain an organic treatment agent;

[0059] A3. Add 30 parts of micron-grade corundum to 70 parts of the above organic treatment agent, and ultrasonically disperse it for 5 minutes to completely disperse it evenly to obtain the surface treatment agent.

[0060] The specific preparation method and use method are the same as those in Example 1. After the concrete is vibrated and before the slurry is leveled, the surface treatment agent is applied at a concentration of 15 g / m 2 Spray evenly on the concrete surface.

[0061] Example 4

[0062] This embodiment prepares an airport pavement concrete surface treatment agent with enhanced wear resistance.

[0063] The preparation steps of the surface treatment agent composed of organic treatment agent and micron-grade corundum are as follows:

[0064] A1. Add 20 parts of γ-aminopropyltrimethoxysilane to 60 parts of propylene glycol monobutyl ether and stir to obtain an organic solvent;

[0065] A2. 20 parts of methyltriethoxysilane were added to the organic solvent and stirred to obtain an organic treatment agent;

[0066] A3. Add 40 parts of micron-grade corundum to 70 parts of the above organic treatment agent, and ultrasonically disperse it for 5 minutes to completely disperse it evenly to obtain the surface treatment agent.

[0067] The specific preparation method and use method are the same as those in Example 1. After the concrete is vibrated and before the slurry is leveled, the surface treatment agent is applied at a concentration of 15 g / m 2 Spray evenly on the concrete surface.

[0068] Example 5

[0069] This embodiment prepares an airport pavement concrete surface treatment agent with enhanced wear resistance.

[0070] The preparation steps of the surface treatment agent composed of organic treatment agent and micron-grade corundum are as follows:

[0071] A1. Add 20 parts of γ-aminopropyltrimethoxysilane to 60 parts of propylene glycol monobutyl ether and stir to obtain an organic solvent;

[0072] A2. 20 parts of methyltriethoxysilane were added to the organic solvent and stirred to obtain an organic treatment agent;

[0073] A3. Add 20 parts of micron-grade corundum to 70 parts of the above organic treatment agent, and ultrasonically disperse it for 5 minutes to completely disperse it evenly to obtain the surface treatment agent.

[0074] The specific preparation method and use method are the same as those in Example 1. After the concrete is vibrated and before the slurry is leveled, the surface treatment agent is applied at a concentration of 15 g / m 2 Spray evenly on the concrete surface.

[0075] Example 6

[0076] This embodiment prepares an airport pavement concrete surface treatment agent with enhanced wear resistance.

[0077] The preparation steps of the surface treatment agent composed of organic treatment agent and micron-grade corundum are as follows:

[0078] A1. Add 20 parts of γ-aminopropyltrimethoxysilane to 60 parts of propylene glycol monobutyl ether and stir to obtain an organic solvent;

[0079] A2. 20 parts of methyltriethoxysilane were added to the organic solvent and stirred to obtain an organic treatment agent;

[0080] A3. Add 10 parts of micron-grade corundum to 70 parts of the above organic treatment agent, and ultrasonically disperse it for 5 minutes to completely disperse it evenly to obtain the surface treatment agent.

[0081] The specific preparation method and use method are the same as those in Example 1. After the concrete is vibrated and before the slurry is leveled, the surface treatment agent is applied at a concentration of 15 g / m 2 Spray evenly on the concrete surface.

[0082] Example 7

[0083] This embodiment prepares an airport pavement concrete surface treatment agent with enhanced wear resistance.

[0084] The preparation steps of the surface treatment agent composed of organic treatment agent and micron-grade corundum are as follows:

[0085] A1. Add 20 parts of γ-aminopropyltrimethoxysilane to 60 parts of propylene glycol monobutyl ether and stir to obtain an organic solvent;

[0086] A2. 20 parts of methyltriethoxysilane were added to the organic solvent and stirred to obtain an organic treatment agent;

[0087] A3. Add 30 parts of micron-grade corundum to 70 parts of the above organic treatment agent, and ultrasonically disperse it for 5 minutes to completely disperse it evenly to obtain the surface treatment agent.

[0088] The specific preparation method and use method are the same as those in Example 1. After the concrete is vibrated and before the slurry is leveled, the surface treatment agent is applied at a concentration of 10 g / m 2 Spray evenly on the concrete surface.

[0089] Example 8

[0090] This embodiment prepares an airport pavement concrete surface treatment agent with enhanced wear resistance.

[0091] The preparation steps of the surface treatment agent composed of organic treatment agent and micron-grade corundum are as follows:

[0092] A1. Add 20 parts of γ-aminopropyltrimethoxysilane to 60 parts of propylene glycol monobutyl ether and stir to obtain an organic solvent;

[0093] A2. 20 parts of methyltriethoxysilane were added to the organic solvent and stirred to obtain an organic treatment agent;

[0094] A3. Add 30 parts of micron-grade corundum to 70 parts of the above organic treatment agent, and ultrasonically disperse it for 5 minutes to completely disperse it evenly to obtain the surface treatment agent.

[0095] The specific preparation method and use method are the same as those in Example 1. After the concrete is vibrated and before the slurry is leveled, the surface treatment agent is applied at a concentration of 20 g / m 2 Spray evenly on the concrete surface.

[0096] Example 9

[0097] This embodiment prepares an airport pavement concrete surface treatment agent with enhanced wear resistance.

[0098] The preparation steps of the surface treatment agent composed of organic treatment agent and micron-grade corundum are as follows:

[0099] A1. Add 30 parts of γ-aminopropyltrimethoxysilane to 60 parts of xylene and stir to obtain an organic solvent;

[0100] A2. 20 parts of methyltriethoxysilane were added to the organic solvent and stirred to obtain an organic treatment agent;

[0101] A3. Add 30 parts of micron-grade corundum to 70 parts of the above organic treatment agent, and ultrasonically disperse it for 5 minutes to completely disperse it evenly to obtain the surface treatment agent.

[0102] The preparation method of polyethylene glycol distearate modified with hydroxyl group is as follows:

[0103] B1. 100 g of polyethylene glycol 2000 distearate and 200 g of xylene were added to a reactor and heated to 100 ° C. Then 10 g of hydroxyethyl acrylate and 0.5 g of formic acid were added and stirred for 2 h to obtain polyethylene glycol distearate modified with hydroxyl groups;

[0104] B2. After the reaction is completed, stop heating and allow the reaction solution to cool to room temperature. After cooling, use a filtering device to filter out the solid residue in the solvent to obtain a polyethylene glycol distearate solution modified with a hydroxyl group.

[0105] The specific preparation method and use method are the same as those in Example 1. After the concrete is vibrated and before the slurry is leveled, the surface treatment agent is applied at a concentration of 15 g / m 2 Spray evenly on the concrete surface;

[0106] Comparative Example 1

[0107] This comparative example prepares an airport pavement concrete surface treatment agent with enhanced wear resistance, which is different from Example 1 only in that the organic treatment agent does not contain γ-aminopropyltrimethoxysilane.

[0108] The specific preparation method and use method are the same as those in Example 2.

[0109] Comparative Example 2

[0110] This comparative example prepares an airport pavement concrete surface treatment agent with enhanced wear resistance, which is different from Example 1 only in that the surface treatment agent does not contain micron-grade corundum.

[0111] The specific preparation method and use method are consistent with embodiment 2.

[0112] Comparative Example 3

[0113] This comparative example prepares an airport pavement concrete surface treatment agent with enhanced wear resistance, which is different from Example 2 only in that no surface treatment agent is used after the concrete is vibrated and before the slurry is kneaded and leveled.

[0114] Comparative Example 4

[0115] This comparative example prepares an airport pavement concrete surface treatment agent with enhanced wear resistance, which differs from Example 2 only in that fly ash is used instead of micron-sized corundum.

[0116] Comparative Example 5

[0117] This comparative example prepares an airport pavement concrete surface treatment agent with enhanced wear resistance, which differs from Example 2 only in that phenyltriethoxysilane is used instead of micron-sized corundum.

[0118] Test example

[0119] This test example tests the performance of the airport pavement concrete surface treatment agents with enhanced wear resistance prepared in Examples 1-9 and Comparative Examples 1-3.

[0120] Wear resistance test:

[0121] The concrete prepared in Examples 1-9 of the present invention and Comparative Examples 1-3 was formed and cured according to JTG 3420-2020 "Test Code for Cement and Cement Concrete for Highway Engineering" and relevant performance tests were performed. The measurement results are shown in Table 1. The experiment was repeated 3 times and the average value was taken.

[0122] Table 1 Performance of concrete surface treatment agent

[0123]

[0124]

[0125] The results are shown in Table 1. It can be seen from Examples 1-6 and Comparative Examples 1-2 in Table 1 that the effect of micron-grade corundum on the surface wear resistance is greater than that of methyltriethoxysilane. When the dosage of other components is the same, the dosage of micron-grade corundum is within the range of 10-30 parts, and the 28d wear of concrete decreases with the increase of the content of micron-grade corundum in the surface treatment agent. The reason is that micron-grade corundum increases the sand rate of the concrete surface. Within a certain range, when the sand rate increases, that is, when the fine aggregate increases, the wear resistance of the surface will be significantly improved, and the wear resistance of corundum is much greater than that of ordinary machine-made sand or river sand. At the same time, micron-grade corundum can be filled into the pores of the hydration product, making the structure of cement stone more compact. Therefore, the higher the content of micron-grade corundum in the surface treatment agent within a certain range, the better. However, when the content of micron-grade corundum exceeds 30 parts, on the one hand, the ultrasonic method cannot completely disperse it in the organic solvent, and on the other hand, the concrete surface slurry cannot completely wrap the corundum, resulting in the formation of independent block areas, which are very easy to wear.

[0126] After passing through the capillary wall of concrete, methyltriethoxysilane in the organic treatment agent reacts with hydrated cement to form a silane interpenetrating network structure. Through a strong chemical bonding reaction, it gives the concrete surface tension, thereby effectively improving the surface wear resistance of the concrete.

[0127] The present invention mixes two organic treatment agents with micron-grade corundum, so that the surface treatment agent has both chemical treatment and physical filling functions, and has better performance than a single surface treatment agent used on the market.

[0128] It can be seen from Example 2, Examples 7-8 and Comparative Example 3 in the table that when no surface treatment agent is used, the surface wear of the concrete is extremely high, that is, the wear resistance of the concrete surface is poor. When the surface treatment agent is sprayed on the surface, the surface wear of the concrete decreases first and then increases with the increase of the surface treatment agent spraying amount. When the surface treatment agent spraying amount is 15g / m 2When the amount of spraying is too large, the abrasion is the smallest and the wear resistance of the concrete surface is the strongest. However, as the amount of spraying increases, the surface performance of the specimen decreases. This is because when the amount of surface treatment agent is too small, it is not enough to fully cover the concrete surface and form a complete surface reaction layer, and the wear resistance is not enhanced as a whole. When the amount of surface treatment agent sprayed is excessive, the excess surface treatment agent cannot penetrate the capillary wall into the concrete during the maintenance period. The remaining surface treatment agent forms a film on the surface of the concrete and is removed from the entire concrete surface after a certain number of wears, resulting in increased abrasion and reduced wear resistance.

[0129] Based on Examples 1-8 and Comparative Examples 1-3, the dosage of the organic treatment agent is 70 parts, and the dosage of the micron-grade corundum is 30 parts. The scheme of the present invention can greatly improve the wear resistance of the airport pavement concrete surface without significantly increasing the cost of concrete.

[0130] In Example 9, polyethylene glycol distearate modified with hydroxyl group was added, and the 28d abrasion loss was further reduced, thereby further enhancing the wear resistance of the concrete surface.

[0131] In Comparative Example 4, fly ash is used to replace micron-sized corundum. The filling effect of fly ash is relatively limited, so that the pore structure of concrete cannot be effectively improved, thereby affecting the anti-cracking performance of concrete.

[0132] In Comparative Example 5, phenyltriethoxysilane is used to replace micron-sized corundum, wherein the introduction of the phenyl group affects the chemical reaction between silane and cement hydration products, resulting in the amount and quality of the generated calcium silicate gel being less effective than that of methyltriethoxysilane, thereby affecting the strength and wear resistance of the concrete.

[0133] The above content describes the embodiments of the present invention in detail, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the purpose of the present invention. In addition, the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

Claims

1. A surface treatment agent, characterized in that: The raw materials for preparation include, by weight: 10 to 40 parts of micron-grade corundum and 60 to 90 parts of an organic treatment agent; The raw materials for preparing the organic treatment agent include: a silane coupling agent and a surfactant; The silane coupling agent includes at least one of isobutyl triethoxy silane, methyl triethoxy silane, acryl triethoxy silane and butyl acrylate triethoxy silane; The surfactant includes at least one of sodium dodecylbenzene sulfonate, γ-aminopropyltrimethoxysilane, epoxypropylenetrimethoxysilane and methyltrimethoxysilane.

2. The surface treatment agent according to claim 1, characterized in that The raw materials for preparing the organic treatment agent also include a solvent; The solvent includes at least one of xylene, propylene glycol monobutyl ether, ethylene glycol and methyl chloride.

3. The surface treatment agent according to claim 1, characterized in that The micron-grade corundum is of grade F, and has a particle size ranging from 50 μm to 150 μm.

4. The surface treatment agent according to claim 2, characterized in that The raw materials for preparing the organic treatment agent include, by weight, 20 to 30 parts of a silane coupling agent, 20 to 30 parts of a surfactant and 60 to 80 parts of a solvent.

5. The surface treatment agent according to claim 1, characterized in that The raw materials for preparing the organic treatment agent also include polyethylene glycol distearate modified with hydroxyl groups.

6. A method for preparing a surface treatment agent according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1: mixing and dispersing the surfactant and the silane coupling agent to obtain an organic treatment agent; S2: Mix and disperse the micron-sized corundum and the organic treatment agent.

7. The method for preparing a surface treatment agent according to claim 6, characterized in that: Step S1 also includes adding polyethylene glycol distearate modified with hydroxyl groups.

8. The method for preparing a surface treatment agent according to claim 7, characterized in that: The preparation method of the polyethylene glycol distearate modified with hydroxyl group comprises: dispersing and reacting a hydroxyl modifier and polyethylene glycol distearate.

9. The method for preparing a surface treatment agent according to claim 8, characterized in that: The reaction temperature is 60-80°C.

10. Use of the surface treatment agent according to any one of claims 1 to 5 in concrete pavement.

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