Admixture for tower drum concrete as well as preparation method and application of admixture

Abstract

The invention relates to the field of wind energy map data processing, in particular to an admixture for tower drum concrete and a preparation method and application thereof.The admixture is prepared from, by weight, 10-15 parts of silica fume, 15-30 parts of microbeads, 15-25 parts of superfine slag powder, 15-25 parts of fly ash, 5-7 parts of structural self-waterproofing agent and 1-3 parts of shrinkage reducing agent; the structural self-waterproofing agent is selected from at least one of xerogel, a modified expanding agent, fluosilicate, zeolite powder, sodium gluconate, sodium pyrophosphate and sodium dodecyl sulfate; the shrinkage reducing agent is a polyacrylate emulsion, the polyacrylate emulsion comprises an acrylate monomer and a modifier, and the modifier comprises at least one of polyethylene glycol, propylene glycol, nano silicon dioxide, glycerol, sodium silicate and alum. The problems of hydration heat control and appearance improvement can be solved at the same time.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building materials, in particular to a mixing material for tower drum concrete and a preparation method and application thereof. BACKGROUND

[0002] With the rapid development of the new energy industry in China, wind power projects continue to increase, and wind turbine supports are mostly composed of concrete and steel structures in the form of a mixed tower. The segments of such towers are produced in prefabricated component factories and then transported to the site for assembly, and high-performance concrete is generally used for pouring.

[0003] High-performance concrete faces multiple problems in tower drum applications. On the one hand, a large amount of heat is generated during the hydration process of cementitious materials. If the heat cannot be dissipated in time, temperature shrinkage cracks may occur due to the temperature difference between the inside and outside, and the resonance phenomenon during wind turbine operation further exacerbates crack formation, seriously affecting the durability of the structure. On the other hand, the tower drum is in an outdoor environment for a long time, and the appearance of the segments may deteriorate after being washed by wind and rain. Using painting to improve the appearance will increase the cost. At the same time, water penetration will cause erosion to the reinforced concrete and internal steel, damaging the structure and shortening the service life.

[0004] Traditional measures have obvious limitations. Controlling temperature cracks is mostly through curing and insulation, and reducing pouring temperature, but the amount of cementitious materials in high-performance concrete is large, and the hydration heat is high. Such methods not only have limited effect, but also may increase production costs and reduce construction efficiency. Waterproofing and rust prevention mainly rely on surface coating of waterproof paint. This method is greatly affected by the penetration performance of the paint and the state of the concrete, and has the problems of labor-intensive and long construction period. If the steel has rusted before pouring, coating paint may not achieve the desired rust prevention effect.

[0005] Currently, for high-performance concrete used in tower drums, existing technologies have not yet formed an effective solution that can simultaneously control hydration heat and improve appearance, and new technical means need to be developed to solve the above problems. SUMMARY

[0006] The purpose of the present application is to provide a mixing material for tower drum concrete and a preparation method and application thereof, which can simultaneously control hydration heat and improve appearance.

[0007] To achieve the above purpose, the technical solution adopted by the present application is as follows: In a first aspect, the application discloses a mixing material for tower concrete, which comprises 10-15 parts by weight of microsilica, 15-30 parts by weight of microbeads, 15-25 parts by weight of superfine slag powder, 15-25 parts by weight of fly ash, 5-7 parts by weight of structural self-waterproofing agent and 1-3 parts by weight of shrinkage reducing agent; the structural self-waterproofing agent is at least one of xerogel, modified expansive agent, fluorosilicate, zeolite powder, sodium gluconate, sodium pyrophosphate and sodium dodecyl sulfonate; the shrinkage reducing agent is a polyacrylate emulsion, which comprises acrylate monomers and a modifier, and the modifier comprises at least one of polyethylene glycol, propylene glycol, nano-silicon dioxide, glycerol, sodium silicate and alum.

[0008] Preferably, the microsilica is a solid substance formed after gas cooling in the smelting process of ferrosilicon or metallic silicon, and the specific surface area is 15000 m 2 / kg or above Preferably, the microbeads are spherical glass particles selected from fly ash, and the specific surface area is 1000-1500 m 2 / kg.

[0009] Preferably, the superfine slag powder is prepared by drying and grinding of water-quenched blast furnace slag, and the specific surface area is 400-650 m 2 / kg.

[0010] In a second aspect, the application discloses a preparation method of the mixing material for tower concrete, which comprises: providing raw materials according to the component proportions of the mixing material for tower concrete; the raw materials comprise 10-15 parts by weight of microsilica, 15-30 parts by weight of microbeads, 15-25 parts by weight of superfine slag powder, 15-25 parts by weight of fly ash, 5-7 parts by weight of structural self-waterproofing agent and 1-3 parts by weight of shrinkage reducing agent; The microsilica, microbeads, superfine slag powder and fly ash are stirred and mixed to obtain a first mixture; The structural self-waterproofing agent and the shrinkage reducing agent are stirred and mixed to obtain a second mixture; The second mixture is added to the first mixture, and ball milling is performed to make the specific surface area of the material reach 800 m 2 / kg or above, so as to obtain the mixing material for tower concrete.

[0011] In a third aspect, the application discloses application of the mixing material in the preparation of tower concrete, and the amount of the mixing material accounts for 15-30% of the total mass of cementitious materials in the concrete.

[0012] The application has the following unexpected beneficial effects: 1. The shrinkage reducing admixture in the admixture provided by the application is a polyacrylate emulsion, the polyacrylate emulsion comprises acrylate monomers and a modifier, the modifier comprises at least one of polyethylene glycol, propylene glycol, nano-silicon dioxide, glycerol, sodium silicate and alum, can significantly inhibit the early hydration reaction rate of cement, reduce the early hydration heat generation, reduce the temperature difference between the inside and the surface of the concrete, and reduce the probability of temperature shrinkage crack from the root.

[0013] 2. The structural self-waterproofing agent in the admixture provided by the application is selected from at least one of xerogel, modified expanding agent, fluorosilicate, zeolite powder, sodium gluconate, sodium pyrophosphate and sodium dodecyl sulfonate, can form a dense waterproof protective film after the concrete hardens, not only can block water penetration, but also can improve the regularity of the concrete surface and the curing effect. With the use of micro-silica powder, the large specific surface area characteristics of the micro-silica powder can block the capillary pores inside the concrete, further improve the structural density, effectively block the erosion channel of harmful ions such as chloride ions, reduce the corrosion of steel bars and the damage of concrete structure, significantly enhance the erosion resistance and durability of the tower drum concrete, and adapt to the complex service environment outdoors. Moreover, the surface protective film formed by the structural self-waterproofing agent can improve the surface state of the concrete, reduce the appearance deterioration problem caused by wind and rain erosion, improve the appearance beauty of the tower drum segment, and does not need to use additional coating methods to optimize the appearance, thereby reducing the subsequent maintenance cost and construction workload, and taking into account the practicability and economy.

[0014] 3. The admixture components provided by the application include industrial solid waste derived materials such as fly ash and ultra-fine slag powder, realize efficient utilization of solid waste resources, reduce raw material cost and environmental pressure, and meet the development concept of green energy industry. At the same time, the preparation process is simple, has good compatibility with the concrete system, can directly replace part of the cementitious materials, adapts to the use demand of high-performance concrete of the tower drum, and has strong application flexibility and applicability. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application.

[0016] Figure 1 The flowchart of the preparation method of the admixture for tower drum concrete provided by the embodiments of the application.

[0017] Figure 2 The macroscopic morphology schematic diagram of the admixture for tower drum concrete provided by the embodiments of the application. DETAILED DESCRIPTION

[0018] The present application will be described in detail with reference to the drawings and preferred embodiments, and other advantages and effects of the present application can be easily understood by those skilled in the art from the disclosure herein. The present application can also be implemented or applied by other different specific embodiments, and various modifications or changes can be made to the details in the specification based on different views and applications without departing from the spirit of the present application. It should be understood that the preferred embodiments are only for illustrating the present application, but not for limiting the protection scope of the present application.

[0019] In an embodiment, the present application provides a mixture for tower concrete, which comprises 10-15 parts by weight of microsilica, 15-30 parts by weight of microbeads, 15-25 parts by weight of superfine slag powder, 15-25 parts by weight of fly ash, 5-7 parts by weight of structural self-waterproofing agent, and 1-3 parts by weight of shrinkage reducing agent; the structural self-waterproofing agent is selected from at least one of xerogel, modified expanding agent, fluorosilicate, zeolite powder, sodium gluconate, sodium pyrophosphate, and sodium dodecyl sulfonate; and the shrinkage reducing agent is a polyacrylate emulsion, which comprises acrylate monomers and a modifier, and the modifier comprises at least one of polyethylene glycol, propylene glycol, nano-silicon dioxide, glycerol, sodium silicate, and alum.

[0020] The shrinkage reducing agent is a polyacrylate emulsion, which comprises acrylate monomers and a modifier, and the modifier comprises at least one of polyethylene glycol, propylene glycol, nano-silicon dioxide, glycerol, sodium silicate, and alum, which can significantly inhibit the early hydration reaction rate of cement, reduce the generation of early hydration heat, reduce the temperature difference between the inside and the surface of the concrete, and reduce the probability of temperature shrinkage cracks from the root.

[0021] The structural self-waterproofing agent is selected from at least one of xerogel, modified expanding agent, fluorosilicate, zeolite powder, sodium gluconate, sodium pyrophosphate, and sodium dodecyl sulfonate, which can form a dense waterproof protective film after the concrete hardens, not only blocking the penetration of water, but also improving the regularity of the concrete surface and the maintenance effect. In combination with the use of microsilica, the large specific surface area of microsilica can block the capillary pores in the concrete, further improve the structural density, effectively block the erosion channel of harmful ions such as chloride ions, reduce the corrosion of steel bars and the damage of concrete structure, significantly enhance the erosion resistance and durability of tower concrete, and adapt to complex outdoor service environments. Moreover, the surface protective film formed by the structural self-waterproofing agent can improve the surface state of the concrete, reduce the appearance deterioration problem caused by wind and rain erosion, and improve the appearance of the tower tube piece, without the need for additional painting to optimize the appearance, thereby reducing the subsequent maintenance cost and construction workload, and taking into account the practicability and economy.

[0022] The dry gel is a silicon-based dry gel (such as fumed silica prepared by dehydration), an alumina dry gel, or an organic-inorganic composite dry gel (such as a silane-modified silica gel), has a porous structure, slightly swells when water is encountered, can fill the capillary pores of concrete, form a physical barrier layer, adapt to outdoor humid environments, has strong stability, and does not affect the strength of the concrete.

[0023] The modified expansive agent includes a modified sulphoaluminate expansive agent, a coated calcium oxide expansive agent, or a composite modified expansive agent. The sulphoaluminate expansive agent is a calcium sulphoaluminate expansive agent coated with gypsum powder. The coated calcium oxide expansive agent is active calcium oxide particles that are not coated with calcium stearate. The composite modified expansive agent is a composite modified product of sulphoaluminate, calcium oxide, and zeolite powder. The modified expansive agent has a controllable expansion rate that matches the hydration process of the concrete, avoids early cracking, compensates for shrinkage, and improves structural density.

[0024] The fluorosilicate includes industrial-grade powdered sodium fluorosilicate, magnesium fluorosilicate, or zinc fluorosilicate, can react with the hydration products of the concrete to generate insoluble fluorosilicate crystals, block pores, enhance surface hardness, and improve waterproofness and wear resistance.

[0025] The zeolite powder includes clinoptilolite powder or mordenite powder, has adsorption and ion exchange properties, can adsorb free water in the concrete, regulate the hydration rate, fill gaps, and indirectly improve the impermeability.

[0026] The sodium gluconate is an industrial-grade sodium gluconate, white crystalline powder, with a purity of greater than or equal to 98%, has a retarding and dispersing effect, can optimize the setting time of the concrete, avoid cracks caused by uneven shrinkage during the hardening process, and indirectly improve the stability of the waterproof system.

[0027] The sodium pyrophosphate includes anhydrous sodium pyrophosphate or sodium pyrophosphate decahydrate, industrial-grade powder, easily soluble in water. As a dispersant, it can improve the dispersion uniformity of the waterproof components in the concrete, avoid local aggregation, and enhance the compatibility between the components.

[0028] The sodium dodecyl sulfonate is in the form of white powder, as a surfactant, reduces the internal interfacial tension of the concrete, promotes the combination of the waterproof components and the cement hydration products, assists in the formation of a continuous and dense waterproof protective film, and improves the surface regularity.

[0029] In addition, the admixture components provided in the application include industrial solid waste-derived materials such as fly ash and ultra-fine slag powder, efficiently utilize solid waste resources, reduce raw material costs, and reduce environmental pressure, in line with the development concept of the green energy industry. At the same time, the preparation process is simple, has good compatibility with the concrete system, can directly replace part of the cementitious materials, adapts to the use requirements of the tower drum high-performance concrete, and has strong application flexibility and applicability.

[0030] As a preferred embodiment of the present embodiment, the microsilica is a solid material formed after gas cooling in the smelting of ferrosilicon or metallic silicon, and has a specific surface area of 15000 m 2 / kg or more.

[0031] Such microsilica is an industrial by-product formed by gas cooling, and has an ultra-fine powder shape and a high specific surface area of 15000 m 2 / kg or more, which enables it to have a strong filling capacity, fully block the internal capillary pores and micro-cracks of concrete, and greatly reduce the internal porosity. The dense internal structure can effectively block the penetration channels of harmful media such as chloride ions and water, reduce the erosion of harmful ions on the steel bars, and at the same time reduce the structural damage caused by water penetration, thereby significantly improving the corrosion resistance and durability of the tower drum concrete.

[0032] As a preferred embodiment of the present embodiment, the microbead is a spherical particle glass body selected from fly ash, and has a specific surface area of 1000-1500 m 2 / kg.

[0033] The spherical particle morphology of the microbead can reduce the friction between particles, and in combination with the specific surface area of 1000-1500 m 2 / kg, can effectively reduce the viscosity of concrete, improve the flow performance, reduce the vibration frequency and time during the production of tower drum segments, improve the prefabrication efficiency, and at the same time avoid problems such as segregation and bleeding during pouring. In addition, the spherical particles can be tightly packed to fill the internal voids of concrete, and the high specific surface area filling of the microsilica forms a complement, further reducing the internal porosity, blocking the penetration channels of water and harmful ions, and improving the overall corrosion resistance in combination with the structure self-waterproofing agent, thereby prolonging the service life of the tower drum. At the same time, the microbead is derived from fly ash selection and recovery, realizing the resource utilization of industrial solid waste, which not only reduces the raw material cost, but also reduces the environmental pressure, and the source is stable, which can ensure the consistency of the large-scale production of admixtures.

[0034] As a preferred embodiment of the present embodiment, the ultra-fine slag powder is made of water-quenched blast furnace slag after drying and grinding, and has a specific surface area of 400-650 m 2 / kg and meets the S95 grade slag powder standard in GB / T18046-2017.

[0035] The ultra-fine slag powder made of water-quenched blast furnace slag after drying and grinding has high activity, and the specific surface area of 400-650 m 2 / kg can ensure that it fully reacts with the cement hydration products to generate more stable cementitious substances, thereby improving the early form removal strength and long-term mechanical properties of concrete, and at the same time enhancing the structure crack resistance and relieving the stress damage caused by fan resonance.

[0036] The superfine slag powder has good compatibility with microsilica powder, fly ash and other components in the admixture, can synergistically optimize the internal structure of the concrete, improve the overall compactness and interfacial adhesion, and at the same time does not affect the formation of a surface protective film of the structural self-waterproofing agent, thereby ensuring synchronous improvement of waterproofing, appearance and other performances.

[0037] In an embodiment, referring to Figure 1 The application provides a preparation method of an admixture for tower drum concrete, which comprises the following steps: S1, batching, providing raw materials according to the component proportions of the admixture for tower drum concrete described above, including 10-15 parts by weight of microsilica powder, 15-30 parts by weight of microbeads, 15-25 parts by weight of superfine slag powder, 15-25 parts by weight of fly ash, 5-7 parts by weight of a structural self-waterproofing agent and 1-3 parts by weight of a shrinkage-reducing agent.

[0038] It should be noted that all solid raw materials (such as microsilica powder and slag powder) are dry and free of agglomeration, and liquid raw materials (shrinkage-reducing agent emulsion) are free of stratification, so as to avoid affecting the uniformity of subsequent mixing; and raw materials meeting the preferred parameters, such as high specific surface area microsilica powder and spherical microbeads, are preferably selected to ensure the final performance.

[0039] S2, mixing, mixing the microsilica powder, microbeads, superfine slag powder and fly ash to obtain a first mixture.

[0040] Specifically, the four solid active components of microsilica powder, microbeads, superfine slag powder and fly ash are put into a stirring device, and stirred and premixed for 4-6 minutes, so that the material color is uniform and there is no obvious particle agglomeration, and a preliminarily dispersed solid mixture is formed.

[0041] The structural self-waterproofing agent and the shrinkage-reducing agent are stirred and mixed to obtain a second mixture.

[0042] Specifically, the structural self-waterproofing agent (both solid and liquid) and the shrinkage-reducing agent (emulsion) are separately put into another stirring device, and stirred and premixed for 4-6 minutes, so that the structural self-waterproofing agent and the shrinkage-reducing agent emulsion are fully mixed, and direct mixing of the solid materials is avoided to cause uneven dispersion.

[0043] S3, ball milling, the second mixture is added to the first mixture and subjected to ball milling treatment, so that the specific surface area of the material reaches 800 m 2 / kg or above, to obtain the admixture for tower drum concrete.

[0044] Specifically, the second mixture is slowly poured into a ball mill containing the first mixture to avoid excessive local concentration. Then the ball mill is started to grind until the specific surface area of the material reaches 800 m 2 / kg and above, to ensure that each component is refined and uniformly dispersed, forming a dense composite system. After ball milling, the material is discharged in time, quickly filled and sealed to prevent moisture or impurities from entering.

[0045] Referring to Figure 2 As shown, the prepared admixture is a light gray fine powder, which is the typical color after mixing of micro-silica powder, fly ash, ultra-fine slag powder and other solid active components; the powder is uniform in texture, without obvious caking, particle agglomeration or stratification, indicating that the mixing and ball milling process is sufficient, and each component has good dispersibility. Moreover, the material can uniformly fill the groove structure of the container, and has loose stacking state and certain fluidity, which reflects good dispersibility and fluidity, and can assist in improving the workability of concrete in subsequent application. There is no local color difference or component enrichment in the material in the container, indicating that the structural self-waterproofing agent, shrinkage-reducing agent and other components are uniformly mixed with the solid active components, ensuring the performance stability in subsequent application in concrete.

[0046] In an embodiment, the application provides an application of the above-mentioned admixture in preparing tower drum concrete, and the amount of the admixture accounts for 15-30% of the total mass of cementitious materials in the concrete.

[0047] With reference to the total mass of cementitious materials in the concrete, the cementitious materials mainly include cement, and also include other active materials that are not replaced. According to the proportion of 15-30%, the admixture provided in the embodiment of the application is used to replace an equivalent amount of traditional cementitious materials, preferably cement. For example, when the total mass of cementitious materials is 100 kg, the amount of the admixture is 15-30 kg, which corresponds to a reduction of 15-30 kg of cement, ensuring that the total mass of cementitious materials remains unchanged.

[0048] It should be noted that the conventional environment can use 15-20% of the admixture, and the harsh outdoor environment (large temperature difference, high humidity) or high durability requirement can be increased to 25-30%, which is more suitable for different tower drum construction requirements.

[0049] In this embodiment, the admixture amount of 15-30% can effectively reduce the hydration heat and temperature cracks by the shrinkage-reducing component, and can improve the compactness and erosion resistance of concrete by the waterproof component and high-activity filling component, which is suitable for complex service environments such as fan resonance and outdoor erosion. Moreover, the admixture provided in the embodiment of the application can reduce the viscosity of concrete, improve the workability, shorten the vibration molding time during pipe piece production, and improve the prefabrication efficiency; at the same time, it can replace part of the high-priced cement, and the raw materials contain industrial solid waste, which can significantly reduce the comprehensive cost of concrete preparation. At the same time, the admixture provided in the embodiment of the application has good compatibility with the concrete system, which can synergistically improve the early strength of concrete and long-term durability, reduce the problems of steel corrosion and surface deterioration, prolong the service life of the tower drum, and reduce the maintenance cost in the later period.

[0050] Exemplarily, the preparation of the tower drum concrete comprises: putting the admixture together with cement, aggregate (sand, stone), water and other necessary additives (such as retarder) into a mixing device, and fully mixing until the mixture is uniform, so as to ensure that the workability of the concrete meets the standard, that is, the viscosity is reduced and the flow is smooth. After the mixing is completed, the concrete is poured into the tower drum segment mold. Since the admixture has improved the workability, the vibration frequency and vibration time can be appropriately reduced, and the segment can still be formed compactly to reduce bubbles and defects. After pouring, the conventional concrete curing standard is executed, such as covering and moisturizing, controlling the environmental temperature, without the need for additional special curing measures, so as to guarantee the normal hardening and performance of the concrete.

[0051] The embodiments of the application are described in detail above with reference to the drawings, but the application is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the purpose of the application. In addition, the embodiments of the application and the features in the embodiments can be combined with each other without conflict.

Claims

1. An admixture for tower concrete, characterized by: The components of the admixture for the concrete of the tower drum according to any one of claims 1-4 are provided in parts by weight, including 10-15 parts by weight of microsilica, 15-30 parts by weight of microbeads, 15-25 parts by weight of superfine slag powder, 15-25 parts by weight of fly ash, 5-7 parts by weight of structural self-waterproofing agent, and 1-3 parts by weight of shrinkage reducing agent. The structural self-waterproofing agent is at least one selected from the group consisting of xerogel, modified expanding agent, fluorosilicate, zeolite powder, sodium gluconate, sodium pyrophosphate, and sodium dodecyl sulfonate. The shrinkage reducing agent is a polyacrylate emulsion, which includes acrylate monomers and a modifier, and the modifier includes at least one of polyethylene glycol, propylene glycol, nano-silicon dioxide, glycerol, sodium silicate, and alum.

2. An admixture for tower concrete according to claim 1, characterized in that: The micro-silicon powder is solid matter formed after gas cooling in the process of smelting ferrosilicon or metallic silicon, and the specific surface area is 15000m 2 / kg and above.

3. An admixture for tower concrete according to claim 1, characterized in that: The microbeads are spherical glass particles separated from fly ash, with a specific surface area of 1000-1500 m 2 / kg.

4. An admixture for tower concrete according to claim 1, characterized in that: The superfine slag powder is made of water-quenched blast furnace slag after drying and grinding, and has a specific surface area of 400-650 m 2 / kg.

5. A method of producing an admixture for tower concrete, characterized by, The components of the admixture for the concrete of the tower drum according to any one of claims 1-4 are provided in parts by weight, including 10-15 parts by weight of microsilica, 15-30 parts by weight of microbeads, 15-25 parts by weight of superfine slag powder, 15-25 parts by weight of fly ash, 5-7 parts by weight of structural self-waterproofing agent, and 1-3 parts by weight of shrinkage reducing agent. The components of the admixture for the concrete of the tower drum according to any one of claims 1-4 are provided in parts by weight, including 10-15 parts by weight of microsilica, 15-30 parts by weight of microbeads, 15-25 parts by weight of superfine slag powder, 15-25 parts by weight of fly ash, 5-7 parts by weight of structural self-waterproofing agent, and 1-3 parts by weight of shrinkage reducing agent. The structural self-waterproofing agent is at least one selected from the group consisting of xerogel, modified expanding agent, fluorosilicate, zeolite powder, sodium gluconate, sodium pyrophosphate, and sodium dodecyl sulfonate. The shrinkage reducing agent is a polyacrylate emulsion, which includes acrylate monomers and a modifier, and the modifier includes at least one of polyethylene glycol, propylene glycol, nano-silicon dioxide, glycerol, sodium silicate, and alum. The second mixture is added to the first mixture and ball-milled to make the specific surface area of the mixture reach 800 m 2 / kg or above, to obtain the admixture for the tower concrete.

6. Use of a blend as claimed in any one of claims 1 to 4 for the production of a tower concrete, characterized in that: The components of the admixture for the concrete of the tower drum according to any one of claims 1-4 are provided in parts by weight, including 10-15 parts by weight of microsilica, 15-30 parts by weight of microbeads, 15-25 parts by weight of superfine slag powder, 15-25 parts by weight of fly ash, 5-7 parts by weight of structural self-waterproofing agent, and 1-3 parts by weight of shrinkage reducing agent. The components of the admixture for the concrete of the tower drum according to any one of claims 1-4 are provided in parts by weight, including 10-15 parts by weight of microsilica, 15-30 parts by weight of microbeads, 15-25 parts by weight of superfine slag powder, 15-25 parts by weight of fly ash, 5-7 parts by weight of structural self-waterproofing agent, and 1-3 parts by weight of shrinkage reducing agent. The structural self-waterproofing agent is at least one selected from the group consisting of xerogel, modified expanding agent, fluorosilicate, zeolite powder, sodium gluconate, sodium pyrophosphate, and sodium dodecyl sulfonate. The shrinkage reducing agent is a polyacry

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