Concrete surface treating agent as well as preparation method and application thereof

Abstract

The invention belongs to the technical field of concrete construction, and particularly discloses a concrete surface treating agent as well as a preparation method and application thereof. The concrete surface treating agent is prepared from the following raw materials: an organic treating agent, silicon powder and stone powder, wherein the organic treating agent comprises an organic solvent, a concrete surface reinforcing agent and a surfactant. When the use amount of the concrete surface treating agent is low, the surface performance of the concrete can be remarkably improved, and the wear resistance and crack resistance of the pavement concrete are improved. While stone powder waste is utilized, the method has wide application prospects in the field of pavement concrete construction.

Description

Technical Field

[0001] The invention relates to the technical field of concrete construction, and in particular to a concrete 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. For pavement concrete, due to its limited bending, tensile, wear and crack resistance, and the heavy weight and high speed of airplanes and cars, the impact force on the surface of pavement concrete is very large, which can easily cause the pavement to break, crack and serious surface wear, which affects the safety of operation.

[0003] At present, some schemes add treatment agents when mixing concrete raw materials to enhance the surface properties of concrete. However, these methods have the problems of large amount of treatment agents, high overall cost, and large amount of treatment agents wasted, so they are rarely used in actual projects.

[0004] Therefore, a new technical solution is urgently needed to improve the surface performance of pavement concrete and reduce the preparation cost of high-performance pavement concrete. Summary of the invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a concrete surface treatment agent. The concrete surface treatment agent of the present invention can significantly improve the surface performance of concrete and improve the wear resistance and crack resistance of pavement concrete when used in a relatively low amount.

[0006] The invention also provides a preparation method of the concrete surface treating agent.

[0007] The invention also provides a surface-enhanced concrete.

[0008] The invention also provides a pavement concrete construction method.

[0009] The invention also provides application of the concrete surface treatment agent.

[0010] In a first aspect of the present invention, a concrete surface treatment agent is provided, wherein the raw materials for preparing the concrete surface treatment agent include an organic treatment agent, silicon powder and stone powder;

[0011] Wherein, the organic treatment agent includes an organic solvent, a concrete surface enhancer and a surfactant.

[0012] According to a specific embodiment of the present invention, the concrete treating agent provided by the present invention has at least the following beneficial effects: after the concrete is vibrated and sprayed on the concrete surface before slurry is leveled, the wear resistance and crack resistance of the concrete surface can be significantly improved, and the concrete surface treating agent of the present invention has a small amount of usage, a low cost, and also realizes the waste utilization of stone powder.

[0013] According to some embodiments of the present invention, the raw materials for preparation include, by weight: 45 to 75 parts of organic treatment agent, 5 to 30 parts of silicon powder and 10 to 45 parts of stone powder.

[0014] According to some embodiments of the present invention, the raw materials for preparation include, by weight: 45 to 70 parts of organic treatment agent, 10 to 30 parts of silicon powder and 10 to 40 parts of stone powder.

[0015] According to some embodiments of the present invention, the raw materials for preparation include, by weight: 45 to 60 parts of organic treatment agent, 10 to 20 parts of silicon powder and 20 to 40 parts of stone powder.

[0016] According to some embodiments of the present invention, the silicon powder includes nano silicon powder.

[0017] According to some embodiments of the present invention, the particle size of the nano silicon powder is ≤2000 nm.

[0018] According to some embodiments of the present invention, the particle size of the nano silicon powder is ≤1000 nm.

[0019] According to some embodiments of the present invention, the particle size of the nano silicon powder is ≤800 nm.

[0020] The present invention uses nano silicon powder in the concrete surface treatment agent, which can directly participate in the volcanic ash reaction of cement, consume calcium hydroxide produced by cement hydration, generate more hydrated calcium silicate gel, accelerate the hydration rate of tricalcium silicate, and thus improve the degree of hydration. The nano silicon powder that does not participate in the reaction or is excessive can be filled into the pores of the hydration product, making the structure of cement stone more compact, and is used in the concrete surface treatment to enhance the wear resistance and crack resistance of concrete. In addition, the present invention also finds that the use of nano silicon powder with a smaller particle size can achieve better technical effects. Too large a particle size of silicon powder may cause its reaction speed to be slow and unable to react completely, resulting in a decrease in its effect of enhancing the wear resistance and crack resistance of concrete.

[0021] According to some embodiments of the present invention, the stone powder includes machine-made sand and stone powder.

[0022] According to some embodiments of the present invention, the machine-made sand and gravel powder used in the present invention comes from machine-made sand screening tailings, and after ball milling, the particle size of the machine-made sand and gravel powder is ≤0.075 mm.

[0023] According to some embodiments of the present invention, the main components of the machine-made sand and gravel powder are quartz, albite and other minerals, wherein the mass ratio of quartz, albite and other minerals is (60-70):(10-18):(17-25).

[0024] Since stone powder is a completely inert material, machine-made sand with high stone powder content will form a weak area with almost no strength because a large amount of free stone powder will gather at the interface between cement stone and aggregate. Therefore, high-powder machine-made sand usually needs to be processed to remove part of the stone powder before it can be used in concrete, which causes a large amount of stone powder to be discarded, which may cause environmental problems. The present invention utilizes the special properties of stone powder, adds stone powder to the surface treatment agent, and plays a certain filling role on the concrete mixture, increases the excess slurry wrapping the surface of the aggregate, and enhances the water retention and cohesion of the concrete to a certain extent, thereby obtaining better working performance. In addition, using finer machine-made sand and stone powder, it can play a role in micro-aggregate effect and secondary reaction, improve the defects of the transition zone between the cement stone and the aggregate interface to a certain extent, improve the integrity and density of the concrete, and thus improve the wear resistance and crack resistance of the concrete.

[0025] According to some embodiments of the present invention, the weight ratio of the raw material components of the organic treatment agent is organic solvent:concrete surface enhancer:surfactant=(50-70):(15-25):(15-25).

[0026] According to some embodiments of the present invention, the weight ratio of the raw material components of the organic treatment agent is organic solvent:concrete surface enhancer:surfactant=(55-65):(18-22):(18-22).

[0027] According to some embodiments of the invention, the organic solvent comprises xylene.

[0028] According to some embodiments of the present invention, the concrete surface enhancer includes isobutyltriethoxysilane.

[0029] The present invention uses a surface enhancer in the surface treatment agent, which can pass through the capillary wall of the concrete, react with the hydrated cement and form a silane interpenetrating network structure, and impart surface tension to the concrete through a strong chemical bonding reaction, thereby effectively improving the surface wear resistance of the concrete.

[0030] According to some embodiments of the present invention, the surfactant includes sodium dodecylbenzene sulfonate. The use of the surfactant can better disperse the components of the surface treatment agent, which helps to improve the treatment performance of the surface treatment agent.

[0031] When using the concrete surface treatment agent of the present invention, too little usage is insufficient to fully cover the concrete surface, and a complete surface reaction layer cannot be formed, resulting in insufficient improvement in the surface performance of the concrete; however, the use of an excessive amount of the concrete surface treatment agent may result in the inability to penetrate the capillary wall into the concrete within the curing period, and the remaining surface treatment agent forms a film on the surface of the concrete, and falls off from the concrete surface as a whole after a certain number of abrasions, thereby resulting in increased abrasion and reduced wear resistance.

[0032] The second aspect of the present invention provides a method for preparing the concrete surface treatment agent according to the first aspect of the present invention, comprising the following steps:

[0033] S1. Adding a surfactant to an organic solvent and mixing, and then adding a concrete surface enhancer, and mixing to obtain an organic treatment agent;

[0034] S2. Add silica powder and stone powder into the organic treatment agent and disperse them to obtain the concrete surface treatment agent.

[0035] According to some embodiments of the present invention, the dispersing method is ultrasonic dispersion.

[0036] The preparation process of the concrete surface treatment agent of the invention is simple and efficient, and is suitable for industrial production.

[0037] According to a third aspect of the present invention, there is provided a surface-enhanced concrete, wherein the concrete is surface-treated using the concrete surface treatment agent according to the first aspect of the present invention.

[0038] According to some embodiments of the present invention, the surface treatment is to spray a concrete surface treatment agent on the concrete surface after the concrete is vibrated and before the concrete is kneaded and leveled during the concrete preparation process.

[0039] According to some embodiments of the present invention, the spraying amount of the concrete surface treatment agent on the concrete surface is 3 to 14 g / m 2 .

[0040] According to some embodiments of the present invention, the spraying amount of the concrete surface treatment agent on the concrete surface is 5 to 14 g / m 2 .

[0041] According to some embodiments of the present invention, the spraying amount of the concrete surface treatment agent on the concrete surface is 5 to 12 g / m 2 .

[0042] According to some embodiments of the present invention, the raw material composition of the concrete includes, by weight: 290-330 parts of cement, 590-700 parts of machine-made sand, 1290-1340 parts of crushed stone, 120-143 parts of water and 1-3 parts of water reducing agent.

[0043] According to some embodiments of the present invention, the 28d abrasion loss of the concrete is ≤5.25kg / m 2 The 28d wear amount is measured according to the method of JTG 3420-2020 "Testing Procedure for Cement and Cement Concrete in Highway Engineering" T 0567. The concrete treated with the concrete surface treatment agent of the present invention has strong wear resistance and has broad application prospects in the fields of airports, pavements, etc.

[0044] A fourth aspect of the present invention provides a pavement concrete construction method, comprising the following steps:

[0045] The concrete is spread and vibrated, the concrete surface treatment agent described in the first aspect of the present invention is sprayed, and the slurry is kneaded and smoothed.

[0046] According to some embodiments of the present invention, the spraying amount of the concrete surface treatment agent on the concrete surface is 3 to 14 g / m 2 .

[0047] According to some embodiments of the present invention, the spraying amount of the concrete surface treatment agent on the concrete surface is 5 to 14 g / m 2 .

[0048] According to some embodiments of the present invention, the spraying amount of the concrete surface treatment agent on the concrete surface is 5 to 12 g / m 2 .

[0049] According to some embodiments of the present invention, the steps of the pavement concrete construction method also include preliminary preparation work before concrete paving and vibration, embossing or grooving after kneading and smoothing, and subsequent work such as curing and demolding.

[0050] The fifth aspect of the present invention proposes the application of the concrete surface treatment agent described in the first aspect of the present invention, the preparation method described in the second aspect of the present invention, the concrete described in the third aspect of the present invention or the construction method described in the fourth aspect of the present invention in the field of concrete construction.

[0051] Other features and advantages of the present invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0053] Figure 1 This is a flow chart of the construction method of Example 1 of the present invention. DETAILED DESCRIPTION

[0054] The following will be combined with the embodiments to clearly and completely describe the concept of the present invention and the technical effects produced, so as to fully understand the purpose, characteristics and effects of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative work are all within the scope of protection of the present invention.

[0055] If the specific conditions are not specified in the specific implementation mode, the conventional conditions or the conditions recommended by the manufacturer are used. If the manufacturer of the reagents or instruments is not specified, they are all conventional products that can be purchased from the market.

[0056] The particle size of the nano silicon powder used in the specific implementation manner is ≤800nm, and the machine-made sand and gravel powder comes from the tailings of machine-made sand screening. After ball milling, the particle size of the machine-made sand and gravel powder is ≤0.075mm.

[0057] Example 1

[0058] This embodiment provides a concrete pavement surface treatment agent containing stone powder.

[0059] The raw materials for preparing the surface treatment agent of this embodiment are: by weight, 70 parts of organic treatment agent, 10 parts of nano silicon powder and 20 parts of machine-made sand and stone powder;

[0060] The organic treatment agent is composed of 20 parts of sodium dodecylbenzene sulfonate, 60 parts of xylene and 20 parts of isobutyltriethoxysilane;

[0061] The main components of the machine-made sand and gravel powder are quartz, albite and other minerals, with the mass proportions of quartz and albite being 65% and 14% respectively.

[0062] This embodiment also provides a method for preparing the surface treatment agent, the steps are as follows:

[0063] 1) adding 20 parts of sodium dodecylbenzene sulfonate to 60 parts of xylene and stirring to obtain an organic solvent;

[0064] 2) adding 20 parts of isobutyltriethoxysilane to the organic solvent prepared in step 1), stirring evenly to obtain an organic treatment agent;

[0065] 3) 10 parts of nano silicon powder and 20 parts of machine-made sand and stone powder were added to 70 parts of the organic treatment agent prepared in step 2), and ultrasonically dispersed for 5 minutes to make it completely dispersed and uniform, thereby obtaining a surface treatment agent.

[0066] This embodiment also provides a method for using the surface treatment agent on a concrete pavement:

[0067] 1) Prepare concrete: by weight, prepare 310 parts of ordinary 425 silicate cement, 650 parts of machine-made sand (medium sand in zone II), 1310 parts of crushed stone (compounded in a ratio of 10-20 mm crushed stone to 16-31.5 mm crushed stone = 7:3), 126 parts of water, and 2 parts of water reducing agent (solid content 30%, water reduction rate 27%); stir and mix all the concrete raw materials;

[0068] 2) After vibrating the concrete and before slurry leveling, apply the surface treatment agent at a rate of 10g / m 2 Spray the amount evenly on the concrete surface.

[0069] This embodiment also provides an airport pavement surface construction method using the surface treatment agent, the construction process is as follows: Figure 1 shown.

[0070] Example 2

[0071] This embodiment provides a concrete pavement surface treatment agent containing stone powder, and provides a preparation method and a use method thereof.

[0072] The composition of the surface treatment agent of this embodiment is as follows by weight: 60 parts of organic treatment agent, 30 parts of nano silicon powder and 10 parts of machine-made sand and gravel powder; the preparation method and use method of the surface treatment agent are the same as those in Example 1.

[0073] Example 3

[0074] This embodiment provides a concrete pavement surface treatment agent containing stone powder, and provides a preparation method and a use method thereof.

[0075] The composition of the surface treatment agent of this embodiment is as follows by weight: 50 parts of organic treatment agent, 20 parts of nano silicon powder and 30 parts of machine-made sand and gravel powder; the preparation method and use method of the surface treatment agent are the same as those in Example 1.

[0076] Example 4

[0077] This embodiment provides a concrete pavement surface treatment agent containing stone powder, and provides a preparation method and a use method thereof.

[0078] The surface treatment agent of this embodiment is composed of 50 parts of organic treatment agent, 10 parts of nano silicon powder and 40 parts of machine-made sand and gravel powder in parts by weight; the preparation method and use method of the surface treatment agent are the same as those in Example 1.

[0079] Example 5

[0080] This embodiment provides a concrete pavement surface treatment agent containing stone powder, and provides a preparation method and a use method thereof.

[0081] The surface treatment agent of this embodiment is composed of 50 parts of organic treatment agent, 10 parts of nano silicon powder and 40 parts of machine-made sand and stone powder in parts by weight; the preparation method of the surface treatment agent is the same as that of Example 1;

[0082] This embodiment also provides a method for using the surface treatment agent on a concrete pavement:

[0083] After concrete is vibrated and before slurry is leveled, apply the surface treatment agent at a rate of 5g / m 2 Spray the amount evenly on the concrete surface.

[0084] Example 6

[0085] This embodiment provides a concrete pavement surface treatment agent containing stone powder, and provides a preparation method and a use method thereof.

[0086] The only difference between this example and Example 4 is that the particle size of the silicon powder used in this comparative example is 2000 nm.

[0087] Comparative Example 1

[0088] This comparative example provides a concrete pavement surface treatment agent containing stone powder, and provides a preparation method and a use method thereof.

[0089] The surface treatment agent of this comparative example is composed of 50 parts of organic treatment agent, 10 parts of nano silicon powder and 40 parts of machine-made sand and stone powder in parts by weight; the preparation method of the surface treatment agent is the same as that of Example 1;

[0090] This comparative example also provides a method for using the surface treatment agent on a concrete pavement:

[0091] After concrete is vibrated and before slurry is leveled, apply the surface treatment agent at a rate of 15g / m 2 Spray the amount evenly on the concrete surface.

[0092] Comparative Example 2

[0093] This comparative example provides a concrete pavement surface treatment agent containing stone powder, and provides a preparation method and a use method thereof.

[0094] The surface treatment agent of this comparative example is composed of 50 parts of organic treatment agent, 10 parts of nano silicon powder and 40 parts of machine-made sand and stone powder in parts by weight; the preparation method of the surface treatment agent is the same as that of Example 1;

[0095] This comparative example also provides a method for using the surface treatment agent on a concrete pavement:

[0096] After concrete is vibrated and before slurry is leveled, apply the surface treatment agent at a rate of 20g / m 2 Spray the amount evenly on the concrete surface.

[0097] Comparative Example 3

[0098] This comparative example provides a concrete pavement surface treatment agent containing stone powder, and provides a preparation method and a use method thereof.

[0099] The only difference between this comparative example and Example 3 is that the raw material of the surface treatment agent in this comparative example does not contain nano silicon powder.

[0100] Comparative Example 4

[0101] This comparative example provides a concrete pavement surface treatment agent, and provides a preparation method and a use method thereof.

[0102] The only difference between this comparative example and Example 3 is that the raw material of the surface treatment agent in this comparative example does not contain machine-made sand and gravel powder.

[0103] Comparative Example 5

[0104] This comparative example provides a concrete pavement surface treatment agent containing stone powder, and provides a preparation method and a use method thereof.

[0105] The surface treatment agent of this comparative example is composed of 50 parts by weight of an organic treatment agent, 40 parts by weight of nano-silicon powder and 40 parts by weight of machine-made sand and gravel powder; the preparation method and use method of the surface treatment agent are the same as those of Example 1.

[0106] Test Case

[0107] The performance of the concrete pavement surface treatment agents prepared in Examples 1 to 6 and Comparative Examples 1 to 4 were tested to test their wear resistance and crack resistance. The testing method was as follows: the surface treatment agents of each embodiment and comparative example were used to treat the concrete specimens according to their usage methods, and the concrete specimens were molded and cured according to JTG 3420-2020 "Test Procedures for Cement and Cement Concrete for Highway Engineering" T 0567 and the wear resistance test was performed. The concrete specimens were molded and cured according to JTG 3420-2020 "Test Procedures for Cement and Cement Concrete for Highway Engineering" T0573 and the crack resistance test was performed.

[0108] The wear resistance test results are shown in Table 1. Each group of tests was repeated 3 times, and the results were averaged. The blank group was a concrete specimen without using a surface treatment agent.

[0109] Table 1

[0110]

[0111]

[0112] The crack resistance test is to cure the specimens in a standard curing room at 20±2°C and relative humidity greater than 95% for 3 days after molding, and count the cracking conditions on the surface of the specimens after 3 days. The results are shown in Table 2.

[0113] Table 2

[0114] Group Number of cracks The longest crack length (mm) Example 1 3 8 Example 2 3 6 Example 3 2 6 Example 4 1 3 Example 5 1 5 Example 6 2 7 Comparative Example 1 6 14 Comparative Example 2 7 15 Comparative Example 3 5 9 Comparative Example 4 5 12 Comparative Example 5 8 17 Blank Group 6 15

[0115] From the above test results of wear resistance and crack resistance, it can be seen that after treating concrete with the concrete surface treatment agent prepared by the scheme of the present invention, the wear of the concrete pavement can be significantly enhanced and the number and length of cracks can be significantly reduced, indicating that the use of the concrete surface treatment agent of the scheme of the present invention can significantly improve the wear resistance and crack resistance of the concrete surface.

[0116] The reason why the scheme of the present invention can improve the wear resistance and crack resistance of the concrete surface is analyzed. On the one hand, the isobutyl triethoxysilane in the organic treatment agent used in the present invention can pass through the capillary wall of the concrete and react with the hydrated cement to form a silane interpenetrating network structure. Through a strong chemical bonding reaction, the concrete is given a strong surface tension, thereby effectively improving the surface wear resistance of the concrete. On the other hand, the present invention uses nano-silicon powder to consume the calcium hydroxide produced by cement hydration through a volcanic ash reaction to generate more hydrated calcium silicate gel. At the same time, there are a large number of unsaturated residual bonds and hydroxyl groups in different bonding states on the surface of the nano-silicon powder, and the specific surface area is large. The nano-silicon powder added to the cement paste can quickly absorb ions in the liquid phase and quickly convert the "first hydrate" C3S-H with a low silicon-calcium ratio formed on the surface of the tricalcium silicate particles into a hydrated calcium silicate gel. n It is converted into a "second hydration product" (needle-shaped CSH) with good permeability and a high silicon-calcium ratio, which accelerates the hydration rate of C3S and further improves the degree of hydration. Nano-silicon powder that does not participate in the reaction or is in excess can be filled into the pores of the hydration product, making the structure of the cement stone denser. Therefore, the higher the content of nano-silicon powder in the surface treatment agent is within a certain range, the better. However, the particle size of nano-silicon powder is extremely fine and it is easy to agglomerate. When the content of nano-silicon powder is too high, it is difficult to fully disperse it, resulting in a decrease in the performance of the surface treatment agent. In addition, the use of nano-silicon powder with a smaller particle size can achieve better technical effects. Too large a particle size of silicon powder may cause it to react slowly and fail to react completely, resulting in its enhanced wear resistance of concrete. The effect of anti-cracking performance is reduced; in addition, the present invention also adds a certain amount of machine-made sand and stone powder to the surface treatment agent. The stone powder can play a certain filling role in the concrete mixture, increase the surplus slurry wrapping the surface of the aggregate, and to a certain extent enhance the water retention and cohesion of the concrete, thereby obtaining better working performance. In addition, the machine-made sand prepared from high-quality parent rock has a certain activity compared with the finer stone powder, which can play a micro-aggregate effect and secondary reaction, and to a certain extent improve the defects in the transition zone between the cement stone and the aggregate interface, improve the integrity and density of the concrete, thereby improving the wear resistance of the concrete, but the larger particles of excessive stone powder are completely inert materials, forming defective areas in the slurry, thereby reducing the wear resistance of the concrete.

[0117] Therefore, the scheme of the present invention rationally adapts the organic treatment agent, nano-silicon powder and machine-made sand and gravel powder, and combines their respective advantages, so that the concrete surface treatment agent prepared by the present invention has excellent chemical treatment and physical filling functions, and synergistically treats the concrete surface in multiple aspects, which plays a role in significantly enhancing the wear resistance and crack resistance of the concrete surface, and has broad application prospects in concrete pavement treatment. In addition, the scheme of the present invention also realizes the waste utilization of machine-made sand and gravel powder.

[0118] The blank group did not use the surface treatment agent to treat the concrete, and its surface wear was very high and the wear resistance was poor. By comparing Examples 4 and 5 with Comparative Examples 1 and 2, it can be found that when the surface treatment agent prepared by the present invention is sprayed on the concrete surface, the wear of the concrete first decreases and then increases with the increase of the amount of the surface treatment agent used. The spraying amount of the concrete surface treatment agent in Example 4 is 10 g / m 2 When the concrete wear is the smallest, the concrete specimen has the strongest wear resistance, but the amount of surface treatment agent reaches 15g / m 2 When the surface treatment agent is sprayed in excess, the surface performance of the concrete specimen decreases. After analysis, it is believed that this may be because 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, and the remaining surface treatment agent forms a film on the surface of the concrete, and after a certain number of abrasions, it falls off from the concrete surface as a whole, resulting in increased abrasion and reduced wear resistance. When the silicon powder content in the surface treatment agent of Comparative Example 5 is too much, it will also cause a significant decrease in the treatment effect. It is analyzed that when the amount of silicon powder is too much, the ultrasonic method cannot completely disperse it in the organic solvent, resulting in a decrease in the performance of the treatment agent. When the surface treatment agent of Comparative Example 5 is actually tested, agglomerated block solids can be seen on the surface of the formed concrete, which are detected to be silicon powder.

[0119] The above is a detailed description of the embodiments of the present invention, 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 concrete surface treatment agent, characterized in that: The preparation raw materials include organic treatment agent, silicon powder and stone powder; Wherein, the organic treatment agent includes an organic solvent, a concrete surface enhancer and a surfactant.

2. The concrete surface treatment agent according to claim 1, characterized in that: The raw materials for preparation include, by weight: 45-75 parts of organic treatment agent, 5-30 parts of silicon powder and 10-45 parts of stone powder.

3. The concrete surface treatment agent according to claim 1, characterized in that: The silicon powder includes nano silicon powder, and the stone powder includes machine-made sand and stone powder.

4. The concrete surface treatment agent according to claim 1, characterized in that: The weight ratio of the raw material components of the organic treatment agent is organic solvent:concrete surface enhancer:surfactant=(50-70):(15-25):(15-25).

5. The concrete surface treatment agent according to claim 4, characterized in that: The concrete surface enhancer includes isobutyltriethoxysilane.

6. The method for preparing a concrete surface treatment agent according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1. Adding a surfactant to an organic solvent and mixing, and then adding a concrete surface enhancer, and mixing to obtain an organic treatment agent; S2. Add silica powder and stone powder into the organic treatment agent and disperse them to obtain the concrete surface treatment agent.

7. A surface-enhanced concrete, characterized in that: The concrete is surface treated using the concrete surface treating agent according to any one of claims 1 to 5.

8. A pavement concrete construction method, characterized in that: The following steps are involved: The concrete is spread and vibrated, and the concrete surface treatment agent according to any one of claims 1 to 5 is sprayed, and the slurry is kneaded and smoothed.

9. The pavement concrete construction method according to claim 8, characterized in that: The spraying amount of the concrete surface treatment agent on the concrete surface is 3-14 g / m 2 .

10. Use of the concrete surface treatment agent according to any one of claims 1 to 5, the preparation method according to claim 6, the concrete according to claim 7 or the construction method according to any one of claims 8 to 9 in the field of concrete construction.

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