Mirror concrete and method for producing the same

Abstract

The present application relates to the technical field of concrete, and discloses mirror concrete and a preparation method thereof, which comprises the following components by weight: 360-400 parts by weight of cement, 60-100 parts by weight of fly ash, 250-320 parts by weight of fine aggregate, 300-500 parts by weight of coarse aggregate, 1-3 parts by weight of polycarboxylate superplasticizer, 4-6 parts by weight of additive, 2-3 parts by weight of modified ferrocene, 80-100 parts by weight of water, 15-20 parts by weight of water-soluble acrylic resin and 2-3 parts by weight of carboxyl-modified silane. The mirror concrete has good gloss and mechanical properties.

Description

Technical Field

[0001] This invention relates to the field of concrete technology, specifically to a mirror-finish concrete and its preparation method. Background Technology

[0002] Mirror concrete, as a high-end concrete product, is increasingly widely used in modern architecture due to its unique appearance and numerous advantages. It features accurate geometric dimensions, straight column edges, dense interior, a smooth, mirror-like surface, consistent color, and a fine, delicate, and dense texture, achieving a near-homogeneous marble-like quality, thus forming its unique mirror-like decorative aesthetic. Compared to ordinary concrete, mirror concrete is not only more aesthetically pleasing but also eliminates the need for plastering and finishing processes, shortening the construction period and significantly reducing project costs.

[0003] However, the preparation of mirror-finish concrete remains challenging. During concrete production, fluctuations in raw materials and construction conditions—such as variations in the quality and measurement of cement, aggregates, and admixtures; changes in water usage or aggregate moisture content leading to fluctuations in the water-cement ratio; and weather changes during mixing, transportation, pouring, and construction—can cause variations in concrete properties, affecting its performance and appearance. While some existing technologies have improved concrete performance in certain aspects, they have not yet fully resolved the problems in the preparation of mirror-finish concrete. For example, some technologies improve the crack resistance of concrete but have little effect on its appearance; some technologies can enhance the surface texture but have not yet achieved a mirror-like finish. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a mirror-finish concrete and its preparation method, which exhibits superior gloss and mechanical properties.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the present invention provides the following technical solution: a mirror concrete, comprising the following weight components: 360-400 parts by weight of cement, 60-100 parts by weight of fly ash, 250-320 parts by weight of fine aggregate, 300-500 parts by weight of coarse aggregate, 1-3 parts by weight of polycarboxylate superplasticizer, 4-6 parts by weight of admixture, 2-3 parts by weight of modified ferrocene, 80-100 parts by weight of water, 15-20 parts by weight of water-soluble acrylic resin, and 2-3 parts by weight of carboxyl-modified silane.

[0008] The method for preparing the carboxyl-modified silane is as follows:

[0009] S1. Under a nitrogen atmosphere, N-cyclohexyl monoethanolamine, potassium carbonate catalyst, and hydroquinone polymerization inhibitor were added to tetrahydrofuran solvent and stirred. Acryloyloxypropyltrimethoxysilane was then added to the mixture and the temperature was raised to 30-35℃ for 2-3 hours. After the reaction was completed, the mixture was filtered, washed, and dried to obtain silane intermediate 1.

[0010] S2. Add 4-8 mmol of intermediate 1 and 5-6 mmol of itaconic anhydride to 45-60 mL of acetone solvent, stir and mix, then add 0.2-0.26 mmol of p-toluenesulfonic acid catalyst, react at 52-56 °C for 4-7 h, and then rotary distill to obtain carboxyl-modified silane.

[0011] Further, the ratio of tetrahydrofuran solvent, N-cyclohexyl monoethanolamine, potassium carbonate catalyst, hydroquinone polymerization inhibitor, and acryloyloxypropyltrimethoxysilane in S1 is 50-65 mL: 1.51-1.53 ​​g: 0.01-0.012 g: 0.02-0.03 g: 2.3-2.7 g.

[0012] Furthermore, the preparation method of the admixture is as follows:

[0013] S3. Add 1.6-1.7 mmol of 1,3-di(dimethylamino)-2-propanol and 0.1-0.2 mmol of triethylamine to 50-60 mL of N,N-dimethylformamide solvent, stir to dissolve, and add 0.9-1.1 mmol of adipic acid chloride dropwise. After the addition is complete, heat to 25-32 °C to react. After the reaction is complete, filter and remove the solvent by rotary evaporation to obtain intermediate 2.

[0014] S4. Add 3-bromo-propyltrimethylammonium bromide and intermediate 2 to the ethanol solvent, stir and mix, and react at 80-90℃ for 24-26 h. After the reaction is completed, wash with ethanol and dry to obtain the additive.

[0015] Furthermore, the reaction time in S3 is 2-4 hours.

[0016] Furthermore, in S4, the ratio of ethanol solvent, 3-bromopropyltrimethylammonium bromide, and intermediate 2 is 45-55 mL: 3-6 mmol: 2.3-2.7 mmol.

[0017] Further, the modified ferrocene is prepared as follows: 0.27-0.31g of 1-(3-aminopropyl)imidazole dissolved in 20-25ml of anhydrous ethanol is added to a reactor. Under N2 protection, the mixture is stirred and heated. 40-45mL of 1.05-1.07g of ferrocene formaldehyde solution dissolved in anhydrous ethanol is slowly added dropwise. After the addition is completed in 0.4-0.5h, the reaction continues for 3-4h. The mixture is then cooled, filtered, recrystallized from ethanol three times, and dried under vacuum to obtain the modified ferrocene.

[0018] Furthermore, the heating temperature is 70-80℃.

[0019] Further, the preparation method of the mirror concrete is as follows: cement, fly ash, fine aggregate, and coarse aggregate are added to a mixer and mixed. Then, 50-60% of the water in the raw materials is added and stirred for 2-3 minutes. After stirring, polycarboxylate superplasticizer, admixture, carboxyl-modified silane, modified ferrocene, and all the remaining water in the raw materials are added to the system. After stirring for another 2-3 minutes, the concrete is poured and compacted. 48 hours after pouring, the formwork is removed. After demolding, the surface of the specimen is sprayed with water to ensure that the surface is fully moistened. Then, a transparent film is laid for sealing and curing. After curing for 28 days, the surface is wiped dry and placed in a 50°C oven for drying for 48 hours. After cooling to room temperature, water-soluble acrylic resin is applied to obtain mirror concrete.

[0020] (iii) Beneficial technical effects

[0021] In the above reaction process, the amino group in 1-(3-aminopropyl)imidazolium and the aldehyde group in ferrocene formaldehyde solution undergo a condensation reaction to generate a Schiff base, introducing an imidazolium group, thereby obtaining modified ferrocene.

[0022] By coating the concrete surface with water-soluble acrylic resin, a uniform film is formed on the surface, enhancing its smoothness and giving the concrete a mirror-like effect.

[0023] The siloxane groups in carboxyl-modified silanes react with cement hydration products in concrete to form a stable siloxane bond network, filling the internal pores of concrete and improving the density of the microstructure. This effect reduces stress concentration points, thereby improving the mechanical properties of concrete. The carboxyl groups in carboxyl-modified silanes also increase the durability of concrete. The quaternary ammonium salt groups in admixtures can be adsorbed on the surface of cement particles, improving the dispersibility of cement paste, promoting more complete cement hydration, reducing strength loss caused by uneven hydration, and helping to improve mechanical properties. Furthermore, the reaction of 3-bromo-propyltrimethylammonium bromide with intermediate 2 increases the degree of substitution of quaternary ammonium salt, further enhancing mechanical properties. The ferrocene in the modified ferrocene has a stable chemical structure and good dispersibility. It can fill the micropores inside concrete and refine the grains of hydration products. The iron element in its molecule can form coordination compounds with cement hydration products, enhancing the overall structure and thus improving mechanical properties. The nitrogen atom in the Schiff base group has lone pair electrons, which can form coordination bonds with metal ions such as calcium ions and aluminum ions generated during cement hydration. Its polar structure can enhance the adsorption between cement paste and aggregate surface, reduce microcracks, and thus improve the mechanical properties of concrete. Attached Figure Description

[0024] Figure 1 It is the reaction formula for silane intermediate 1. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific embodiments.

[0027] The cement used was ordinary Portland cement (P·O42.5) from Guangzhou Shijing Deqing Cement Plant Co., Ltd. The fly ash used was Grade II fly ash produced by Xiamen Yicai Fly Ash Co., Ltd. The fine aggregate was river sand from Chaozhou Chaoan District Shuncheng Building Materials Business Department. The coarse aggregate was biotite granite from Shantangwei Quarry in Xiabao Town, Xingning City, with a particle size of 20 mm. The water-reducing agent used was polycarboxylate-based high-performance water-reducing agent (retarded type) from Sichuan Dongrun Baisheng New Materials Co., Ltd., with a water reduction rate ≥25% and a solid content of 21×(1±5%). The mixing water used in this experiment was tap water. The water-soluble acrylic resin was WH-282 (PC-2) from Guangzhou Wanhua New Materials Technology Co., Ltd.

[0028] Template: 400 mm × 100 mm × 100 mm combined steel template.

[0029] Example 1

[0030] A mirror-finish concrete comprises the following components by weight: 360 parts by weight of cement, 60 parts by weight of fly ash, 250 parts by weight of fine aggregate, 300 parts by weight of coarse aggregate, 1 part by weight of polycarboxylate superplasticizer, 4 parts by weight of admixture, 2 parts by weight of modified ferrocene, 80 parts by weight of water, 15 parts by weight of water-soluble acrylic resin, and 2 parts by weight of carboxyl-modified silane.

[0031] The method for preparing the carboxyl-modified silane is as follows:

[0032] S1. Under a nitrogen atmosphere, 1.51 g of N-cyclohexyl monoethanolamine, 0.01 g of potassium carbonate catalyst, and 0.02 g of hydroquinone polymerization inhibitor were added to 50 mL of tetrahydrofuran solvent and stirred. Then, 2.3 g of acryloyloxypropyltrimethoxysilane was added, and the mixture was heated to 30 °C and reacted for 2 h. After the reaction was completed, the mixture was filtered, washed, and dried to obtain silane intermediate 1.

[0033] S2. Add 4 mmol of intermediate 1 and 5 mmol of itaconic anhydride to 45 mL of acetone solvent, stir and mix, then add 0.2 mmol of p-toluenesulfonic acid catalyst, react at 52 °C for 4 h, and then rotary distill to obtain carboxyl-modified silane.

[0034] The preparation method of the admixture is as follows:

[0035] S3. Add 1.6 mmol of 1,3-di(dimethylamino)-2-propanol and 0.1 mmol of triethylamine to 50 mL of N,N-dimethylformamide solvent, stir to dissolve, add 0.9 mmol of adipic acid chloride dropwise, and after the addition is complete, heat to 25 °C and react for 2 h. After the reaction is complete, filter and remove the solvent by rotary evaporation to obtain intermediate 2.

[0036] S4. Add 3 mmol of 3-bromopropyltrimethylammonium bromide and 2.3 mmol of intermediate 2 to 45 mL of ethanol solvent, stir and mix, and react at 80 °C for 24 h. After the reaction is completed, wash with ethanol and dry to obtain the additive.

[0037] The modified ferrocene is prepared as follows: 0.27 g of 1-(3-aminopropyl)imidazole dissolved in 20 ml of anhydrous ethanol is added to a reactor. Under N2 protection, the mixture is stirred and heated to 70 °C. 1.05 g of ferrocene formaldehyde solution dissolved in 40 mL of anhydrous ethanol is slowly added dropwise. After the addition is completed in 0.4 h, the reaction continues for 3 h. The mixture is then cooled, filtered, recrystallized from ethanol three times, and dried under vacuum to obtain the modified ferrocene.

[0038] The preparation method of the mirror concrete is as follows: cement, fly ash, fine aggregate, and coarse aggregate are added to a mixer and mixed. Then, 50% of the water in the raw materials is added and stirred for 2 minutes. After stirring, polycarboxylate superplasticizer, admixture, carboxyl-modified silane, modified ferrocene, and all the remaining water in the raw materials are added to the system. After stirring for another 2 minutes, the concrete is poured and compacted. 48 hours after pouring, the formwork is removed. After demolding, the surface of the specimen is sprayed with water to ensure that the surface is fully moistened. Then, a transparent film is laid for sealing and curing. After curing for 28 days, the surface is wiped dry and placed in a 50°C oven for drying for 48 hours. After cooling to room temperature, water-soluble acrylic resin is applied to obtain the mirror concrete.

[0039] Example 2

[0040] A mirror-finish concrete comprises the following components by weight: 400 parts by weight of cement, 100 parts by weight of fly ash, 320 parts by weight of fine aggregate, 500 parts by weight of coarse aggregate, 3 parts by weight of polycarboxylate superplasticizer, 6 parts by weight of admixture, 3 parts by weight of modified ferrocene, 100 parts by weight of water, 20 parts by weight of water-soluble acrylic resin, and 3 parts by weight of carboxyl-modified silane.

[0041] The method for preparing the carboxyl-modified silane is as follows:

[0042] S1. Under a nitrogen atmosphere, 1.53 g of N-cyclohexyl monoethanolamine, 0.012 g of potassium carbonate catalyst, and 0.03 g of hydroquinone polymerization inhibitor were added to 65 mL of tetrahydrofuran solvent. The mixture was stirred and mixed. Then, 2.7 g of acryloyloxypropyltrimethoxysilane was added. The mixture was heated to 35 °C and reacted for 3 h. After the reaction was completed, the mixture was filtered, washed, and dried to obtain silane intermediate 1.

[0043] S2. Add 8 mmol of intermediate 1 and 6 mmol of itaconic anhydride to 60 mL of acetone solvent, stir and mix, then add 0.26 mmol of p-toluenesulfonic acid catalyst, react at 56 °C for 7 h, and then rotary distill to obtain carboxyl-modified silane.

[0044] The preparation method of the admixture is as follows:

[0045] S3. Add 1.7 mmol of 1,3-di(dimethylamino)-2-propanol and 0.2 mmol of triethylamine to 60 mL of N,N-dimethylformamide solvent, stir to dissolve, add 1.1 mmol of adipic acid chloride dropwise, and after the addition is complete, heat to 32 °C and react for 4 h. After the reaction is complete, filter and remove the solvent by rotary evaporation to obtain intermediate 2.

[0046] S4. Add 6 mmol of 3-bromo-propyltrimethylammonium bromide and 2.7 mmol of intermediate 2 to 55 mL of ethanol solvent, stir and mix, and react at 90 °C for 26 h. After the reaction is completed, wash with ethanol and dry to obtain the additive.

[0047] The modified ferrocene is prepared as follows: 0.31 g of 1-(3-aminopropyl)imidazole dissolved in 25 ml of anhydrous ethanol is added to a reactor. Under N2 protection, the mixture is stirred and heated to 80 °C. 1.07 g of ferrocene formaldehyde solution dissolved in 45 mL of anhydrous ethanol is slowly added dropwise. After the addition is completed in 0.5 h, the reaction continues for 4 h. The mixture is then cooled, filtered, recrystallized from ethanol three times, and dried under vacuum to obtain the modified ferrocene.

[0048] The preparation method of the mirror concrete is as follows: cement, fly ash, fine aggregate, and coarse aggregate are added to a mixer and mixed. Then, 60% of the water in the raw materials is added and stirred for 3 minutes. After stirring, polycarboxylate superplasticizer, admixture, carboxyl-modified silane, modified ferrocene, and all the remaining water in the raw materials are added to the system. After stirring for another 3 minutes, the concrete is poured and compacted. 48 hours after pouring, the formwork is removed. After demolding, the surface of the specimen is sprayed with water to ensure that the surface is fully moistened. Then, a transparent film is laid for sealing and curing. After curing for 28 days, the surface is wiped dry and placed in a 50°C oven for drying for 48 hours. After cooling to room temperature, water-soluble acrylic resin is applied to obtain the mirror concrete.

[0049] Example 3

[0050] A mirror-finish concrete comprises the following components by weight: 380 parts by weight of cement, 70 parts by weight of fly ash, 280 parts by weight of fine aggregate, 400 parts by weight of coarse aggregate, 2 parts by weight of polycarboxylate superplasticizer, 5 parts by weight of admixture, 2.5 parts by weight of modified ferrocene, 90 parts by weight of water, 18 parts by weight of water-soluble acrylic resin, and 2.4 parts by weight of carboxyl-modified silane.

[0051] The method for preparing the carboxyl-modified silane is as follows:

[0052] S1. Under a nitrogen atmosphere, 1.52 g of N-cyclohexyl monoethanolamine, 0.011 g of potassium carbonate catalyst, and 0.025 g of hydroquinone polymerization inhibitor were added to 55 mL of tetrahydrofuran solvent and stirred. Then, 2.6 g of acryloyloxypropyltrimethoxysilane was added, and the mixture was heated to 32 °C and reacted for 2 h. After the reaction was completed, the mixture was filtered, washed, and dried to obtain silane intermediate 1.

[0053] S2. Add 6 mmol of intermediate 1 and 5.5 mmol of itaconic anhydride to 50 mL of acetone solvent, stir and mix, then add 0.23 mmol of p-toluenesulfonic acid catalyst, react at 54 °C for 5 h, and then rotary distill to obtain carboxyl-modified silane.

[0054] The preparation method of the admixture is as follows:

[0055] S3. Add 1.6 mmol of 1,3-di(dimethylamino)-2-propanol and 0.16 mmol of triethylamine to 55 mL of N,N-dimethylformamide solvent, stir to dissolve, and add 0.9 mmol of adipic acid chloride dropwise. After the addition is complete, heat to 28 °C and react for 3 h. After the reaction is complete, filter and remove the solvent by rotary evaporation to obtain intermediate 2.

[0056] S4. Add 4 mmol of 3-bromopropyltrimethylammonium bromide and 2.5 mmol of intermediate 2 to 50 mL of ethanol solvent, stir and mix, and react at 87 °C for 25 h. After the reaction is complete, wash with ethanol and dry to obtain the additive.

[0057] The modified ferrocene is prepared as follows: 0.29 g of 1-(3-aminopropyl)imidazole dissolved in 23 ml of anhydrous ethanol is added to a reactor. Under N2 protection, the mixture is stirred and heated to 75 °C. 1.06 g of ferrocene formaldehyde solution dissolved in 42 ml of anhydrous ethanol is slowly added dropwise. After the addition is completed in 0.4 h, the reaction continues for 3 h. The mixture is then cooled, filtered, recrystallized from ethanol three times, and dried under vacuum to obtain the modified ferrocene.

[0058] The preparation method of the mirror concrete is as follows: cement, fly ash, fine aggregate, and coarse aggregate are added to a mixer and mixed. Then, 55% of the water in the raw materials is added and stirred for 2 minutes. After stirring, polycarboxylate superplasticizer, admixture, carboxyl-modified silane, modified ferrocene, and all the remaining water in the raw materials are added to the system. After stirring for another 3 minutes, the concrete is poured and compacted. 48 hours after pouring, the formwork is removed. After demolding, the surface of the specimen is sprayed with water to ensure that the surface is fully moistened. Then, a transparent film is laid for sealing and curing. After curing for 28 days, the surface is wiped dry and placed in a 50°C oven for drying for 48 hours. After cooling to room temperature, water-soluble acrylic resin is applied to obtain the mirror concrete.

[0059] Comparative Example 1

[0060] The difference between this comparative example and Example 3 is that no additives were added.

[0061] Comparative Example 2

[0062] The difference between this comparative example and Example 3 is that no modified ferrocene was added.

[0063] Comparative Example 3

[0064] The difference between this comparative example and Example 3 is that it was not coated with water-soluble acrylic resin.

[0065] Comparative Example 4

[0066] The difference between this comparative example and Example 3 is that no carboxyl-modified silane was added.

[0067] Performance testing

[0068] Examples 1-3 and Comparative Examples 1-3 used rectangular concrete specimens of 400 mm × 100 mm × 100 mm. Gloss was measured using a gloss meter according to GB / T9754-2007 "Determination of 20, 60 and 85 Specular Gloss of Paint Films Without Metallic Pigments," with a measurement angle of 60°. Compressive strength tests were conducted according to GB / T50081-2002 "Standard for Test Methods of Mechanical Properties of Ordinary Concrete," and splitting tensile strength tests were conducted according to GB / T50081-2002 "Standard for Test Methods of Mechanical Properties of Ordinary Concrete."

[0069] Table 1: Gloss and mechanical property tests.

[0070]

[0071] As shown in Table 1, the mirror concrete of the present invention has good mechanical properties and gloss.

[0072] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0073] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

[0074] Those skilled in the art should understand that the above descriptions are merely several specific embodiments of the present invention, and not all embodiments.

Claims

1. A mirror concrete, characterized in that, It includes the following components by weight: 360-400 parts by weight of cement, 60-100 parts by weight of fly ash, 250-320 parts by weight of fine aggregate, 300-500 parts by weight of coarse aggregate, 1-3 parts by weight of polycarboxylate superplasticizer, 4-6 parts by weight of admixture, 2-3 parts by weight of modified ferrocene, 80-100 parts by weight of water, 15-20 parts by weight of water-soluble acrylic resin, and 2-3 parts by weight of carboxyl-modified silane. The method for preparing the carboxyl-modified silane is as follows: S1. Under a nitrogen atmosphere, N-cyclohexyl monoethanolamine, potassium carbonate catalyst, and hydroquinone polymerization inhibitor were added to tetrahydrofuran solvent and stirred. Acryloyloxypropyltrimethoxysilane was then added to the mixture and the temperature was raised to 30-35℃ for 2-3 hours. After the reaction was completed, the mixture was filtered, washed, and dried to obtain silane intermediate 1. S2. Add 4-8 mmol of intermediate 1 and 5-6 mmol of itaconic anhydride to 45-60 mL of acetone solvent, stir and mix, then add 0.2-0.26 mmol of p-toluenesulfonic acid catalyst, react at 52-56 °C for 4-7 h, and then rotary distill to obtain carboxyl-modified silane. The preparation method of the admixture is as follows: S3. Add 1.6-1.7 mmol of 1,3-di(dimethylamino)-2-propanol and 0.1-0.2 mmol of triethylamine to 50-60 mL of N,N-dimethylformamide solvent, stir to dissolve, and add 0.9-1.1 mmol of adipic acid chloride dropwise. After the addition is complete, heat to 25-32 °C to react. After the reaction is complete, filter and remove the solvent by rotary evaporation to obtain intermediate 2. S4. Add 3-bromo-propyltrimethylammonium bromide and intermediate 2 to the ethanol solvent, stir and mix, and react at 80-90℃ for 24-26h. After the reaction is completed, wash with ethanol and dry to obtain the additive. The modified ferrocene is prepared as follows: 0.27-0.31g of 1-(3-aminopropyl)imidazole dissolved in 20-25ml of anhydrous ethanol is added to a reactor. Under N2 protection, the mixture is stirred and heated. 40-45mL of 1.05-1.07g of ferrocene formaldehyde solution dissolved in anhydrous ethanol is slowly added dropwise. After the addition is completed in 0.4-0.5h, the reaction continues for 3-4h. The mixture is then cooled, filtered, recrystallized from ethanol three times, and dried under vacuum to obtain the modified ferrocene. The heating temperature is 70-80℃.

2. The mirror-finished concrete according to claim 1, characterized in that, The ratio of tetrahydrofuran solvent, N-cyclohexyl monoethanolamine, potassium carbonate catalyst, hydroquinone polymerization inhibitor, and acryloyloxypropyltrimethoxysilane in S1 is 50-65 mL. 1.51-1.53g: 0.01-0.012g: 0.02-0.03g: 2.3-2.7g.

3. The mirror-finished concrete according to claim 1, characterized in that, The reaction time in S3 is 2-4 hours.

4. The mirror-finished concrete according to claim 1, characterized in that, The ratio of ethanol solvent, 3-bromopropyltrimethylammonium bromide, and intermediate 2 in S4 is 45-55 mL: 3-6 mmol: 2.3-2.7 mmol.

5. A method for preparing mirror-finish concrete as described in any one of claims 1-4, characterized in that, The preparation method of the mirror concrete is as follows: cement, fly ash, fine aggregate, and coarse aggregate are added to a mixer and mixed. Then, 50-60% of the water in the raw materials is added and mixed for 2-3 minutes. After that, polycarboxylate superplasticizer, admixture, carboxyl-modified silane, modified ferrocene, and all the remaining water in the raw materials are added to the system and mixed for another 2-3 minutes. The mixture is then poured, vibrated, and compacted. 48 hours after pouring, the formwork is removed. After demolding, the surface of the specimen is sprayed with water to ensure that the surface is fully moistened. Then, a transparent film is laid for sealing and curing. After curing for 28 days, the surface is wiped dry and placed in a 50°C oven for drying for 48 hours. After cooling to room temperature, water-soluble acrylic resin is applied to obtain the mirror concrete.

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