Local damage repair process and material based on power plant concrete member

Abstract

The invention discloses a local damage repair process and material based on a power plant concrete member. According to the intelligent curing agent disclosed by the invention, due to the unique components, multiple beneficial effects are brought to local damage repair of the concrete member of the power plant. A layer of compact protective film is formed through polymer latex, moisture is effectively locked, moisture evaporation is reduced, and it is ensured that the repairing material is fully cured in the initial curing stage. Due to the addition of the nano silicate, the infiltration capacity of the curing agent is further enhanced, so that the curing agent can penetrate into a concrete microstructure and react with a cement hydration product to form firmer silicate hydration gel, and the compactness and strength of the repairing material are improved. By adding the antibacterial agent, the growth of microorganisms on the surface and in the repairing material is effectively inhibited, biological erosion is prevented, and the long-term stability of the repairing material is ensured. The anti-aging agent effectively resists the aging effect of environmental factors such as ultraviolet rays and oxygen on the repairing material, and the service life of the repairing material is prolonged.

Description

Technical Field

[0001] The invention belongs to the technical field of concrete components of power plants, and specifically relates to a local damage repair process and material based on concrete components of power plants. Background Art

[0002] Concrete components of power plants are an indispensable and important part of power engineering, and are mainly used to build the infrastructure and main structure of power plants. These components include but are not limited to concrete columns, beams, slabs, walls, foundations, etc., which together constitute the basis for the safe and stable operation of power plants. Concrete components of power plants have the characteristics of high strength, durability, good fire resistance, etc., and can withstand various loads during the operation of power plant equipment. In terms of material selection, concrete components usually use high-strength grade concrete, and are designed according to national standards to ensure their mechanical properties and durability. In addition, during the construction process, the concrete components of power plants are strictly carried out in accordance with the construction specifications and design requirements to ensure the dimensional accuracy and structural safety of the components. Concrete components of power plants play a vital role in ensuring the safe and stable operation of power facilities and are the cornerstone of power engineering construction. However, in special environments such as power plants, concrete components are affected by high temperature, high pressure, chemical corrosion and other factors for a long time, and are prone to local damage, cracking and other problems, which seriously affect the safety and service life of the structure. At present, for the repair of local damage to concrete components, the commonly used methods include using ordinary cement mortar, epoxy resin and other materials for repair.

[0003] However, these traditional repair materials have many shortcomings: ordinary cement mortar has low strength and poor durability, and it is difficult to meet the requirements of the complex environment of power plants; although epoxy resin has high strength, it has poor compatibility with concrete, is prone to interface peeling, and has complex construction and high costs. Summary of the invention

[0004] The purpose of the present invention is to provide a local damage repair process and material based on concrete components of a power plant in order to solve the above-mentioned problems.

[0005] The technical solution adopted by the present invention is as follows: a local damage repair material based on a concrete component of a power plant, comprising:

[0006] Nano silicate cement: 80 parts by weight;

[0007] Ultrafine quartz sand with a particle size of 0-0.5 mm: 120 parts by weight;

[0008] Epoxy resin modified polymer emulsion: 25 parts by weight;

[0009] Nano silicon dioxide additive: 5 parts by weight;

[0010] Polycarboxylic acid polymer water reducer: 1.5 parts by weight;

[0011] Perlite self-expanding microspheres: 4 parts by weight;

[0012] Bio-based early strength agent alkali lignin: 1.5 parts by weight;

[0013] Carbon nanotube fiber: 0.8 parts by weight;

[0014] Active nano silica fume: 15 parts by weight;

[0015] Intelligent curing agent: 3 parts by weight;

[0016] Water: 25-40 parts by weight.

[0017] In a preferred embodiment, the intelligent curing agent comprises: 40 parts by weight of polymer latex, 10 parts by weight of nano-silicate, 20 parts by weight of moisturizer, 5 parts by weight of film-forming aid, 4 parts by weight of antibacterial agent and 2 parts by weight of anti-aging agent;

[0018] The antibacterial agent includes: 0.5 weight part of tea tree oil, 0.5 weight part of peppermint oil, 0.5 weight part of lemongrass oil, 0.5 weight part of garlic extract, 0.5 weight part of thyme oil, 1 weight part of cinnamon oil, 0.5 weight part of rosemary oil,

[0019] The preparation method of the intelligent curing agent includes: firstly, weighing a moisturizer, a film-forming aid, an antibacterial agent and an anti-aging agent in proportion and placing them in a stirring container for pre-mixing to ensure that each component is evenly dispersed; then, diluting a polymer latex in another container in an appropriate amount for subsequent mixing; then, gradually adding the pre-mixed moisturizer, film-forming aid, antibacterial agent and anti-aging agent mixture into the diluted polymer latex, using a high-speed stirring device to fully stir to ensure that each component is completely fused to form a uniform mixture; then gradually adding nano-silicate into the above mixture, using a high-speed dispersing device to disperse, ensuring that the nano-silicate is evenly distributed in the mixture to avoid agglomeration; continuing to stir for a period of time until the mixture becomes uniform and fine, and adjusting the stirring speed and time as needed to achieve the best mixing effect; filtering the mixture through a filter to remove possible impurities and agglomerates to ensure the purity and uniformity of the final product, and thus obtaining the intelligent curing agent.

[0020] In a preferred embodiment, the local damage repair process of the concrete components of the power plant includes the following steps:

[0021] S1: Put nano-Silicate cement and ultra-fine quartz sand into a dry mixing device according to proportion, and perform dry mixing to ensure that the two powder materials are evenly mixed;

[0022] S2: In another container, epoxy resin modified polymer emulsion, polycarboxylic acid polymer water reducer, bio-based early strength agent alkali lignin and intelligent curing agent are mixed and pre-mixed using a low-speed stirring device to form a uniform liquid mixture;

[0023] S3: gradually adding the nano-silicon dioxide additive and the active nano-silicon ash to the above liquid mixture, and dispersing them using a high-speed dispersing device to ensure that the nano-materials are evenly distributed in the mixture to avoid agglomeration;

[0024] S4: gradually adding perlite self-expanding microspheres and carbon nanotube fibers into the mixture, and continuing to stir using a high-speed stirring device to ensure that all solid particles are evenly dispersed in the liquid mixture;

[0025] S5: gradually adding the dry-mixed nano-Silicate cement and ultrafine quartz sand mixture into the liquid mixture, stirring while adding, and using a high-speed stirring device to fully stir to form a uniform slurry;

[0026] S6: Add water gradually as needed, stirring while adding, and adjust the consistency of the slurry to a state suitable for construction;

[0027] S7: Perform vacuum degassing on the mixed slurry to remove internal bubbles and ensure the density and strength of the repair material;

[0028] S8: Place the prepared repair material into a sealed container, label it with the product name, ingredients, production date and instructions for use, and store it in a cool, ventilated place, avoiding direct sunlight and high temperature.

[0029] In a preferred embodiment, in step S1, nano-Silicate cement and ultrafine quartz sand are added to a dry mixing device in proportion, and the capacity of the device is selected to be moderate to ensure that the materials can be fully tumbled without overflowing; the device is started, and frequency conversion speed regulation is adopted, and the initial speed is set to 60 rpm, and gradually increased to 120 rpm to avoid powder flying; during the stirring process, the ambient humidity is maintained between 40% and 60% to prevent the powder from absorbing moisture and agglomerating; the dry mixing time is continued for 15 minutes to ensure that the powder color is uniform and there are no agglomerates visible to the naked eye.

[0030] In a preferred embodiment, in step S2, in a premixing container, first add epoxy resin modified polymer emulsion, then add polycarboxylic acid polymer water reducer, bio-based early strength agent alkali lignin and intelligent curing agent in sequence; use a low-speed stirring device, and control the speed at 50 rpm to avoid excessive foaming; during the premixing process, the temperature is controlled between 20-25°C to ensure that each component is fully dissolved and dispersed; after stirring for 5 minutes, observe that there is no oil or precipitation on the surface of the mixed liquid, which is qualified.

[0031] In a preferred embodiment, in step S3, the nano-silicon dioxide additive and the active nano-silica ash are slowly added to the premixed liquid, and a high-speed dispersing device is used, with the initial speed set to 500 rpm and gradually increased to 1500 rpm to avoid agglomeration of the nanomaterials; during the dispersion process, ultrasonic assisted dispersion technology is used, with the frequency set to 20 kHz and the power to 200 W for 10 minutes; after the dispersion is completed, a small amount of the mixed liquid is taken and observed under a microscope to ensure that the nanoparticles are evenly distributed and there is no agglomeration.

[0032] In a preferred embodiment, in step S4, perlite self-expanding microspheres and carbon nanotube fibers are gradually added to the mixture, and a high-speed stirring device is used with a rotation speed controlled at 1000 rpm; during the stirring process, an intermittent stirring method is adopted, and the stirring is stopped and observed every 5 minutes to ensure that the solid particles are evenly dispersed; the total stirring time is not less than 20 minutes, until the mixture presents a uniform slurry without obvious particle stratification.

[0033] In a preferred embodiment, in step S5, the dry-mixed mixture of nano-Silicate cement and ultrafine quartz sand is gradually added to the liquid mixture, and a spiral stirring device is used with a rotation speed controlled at 800 rpm; the feeding speed is controlled at 10% of the total amount added per minute to avoid uneven stirring caused by material impact; during the mixing process, the temperature is controlled between 25-30°C to ensure good material fluidity; after stirring for 30 minutes, a small amount of the mixture is taken for fluidity test to ensure that the design requirements are met.

[0034] In a preferred embodiment, in step S5, the dry-mixed mixture of nano-Silicate cement and ultrafine quartz sand is gradually added to the liquid mixture, and a spiral stirring device is used with a rotation speed controlled at 800 rpm; the feeding speed is controlled at 10% of the total amount added per minute, and the temperature during the mixing process is controlled between 25-30° C. to ensure good material fluidity; after stirring for 30 minutes, a small amount of the mixture is taken for a fluidity test to ensure that the design requirements are met.

[0035] In a preferred embodiment, in step S6, water is gradually added according to construction requirements, and a low-speed stirring device is used, with the rotation speed controlled at 60 rpm; the amount of water added is adjusted according to the actual consistency of the slurry, and the amount of water added per minute is controlled at 1% of the total water volume by dripping; during the adjustment process, the fluidity of the slurry is monitored in real time, and the slump test method is used to ensure that the slump is between 180-220 mm; after the adjustment is completed, the slurry is allowed to stand for 5 minutes to observe whether there is water seepage on the surface of the slurry;

[0036] In the step S7, the mixed slurry is poured into a vacuum degassing device, the vacuum degree is set to 0.09 MPa, and the degassing time is 15 minutes; during the degassing process, an intermittent vacuuming method is adopted, and the vacuuming is performed once every 5 minutes for 1 minute to avoid slurry splashing; after the degassing is completed, it is observed that no bubbles are generated on the surface of the slurry, and a small amount of slurry is taken for density testing to ensure that the density meets the design requirements;

[0037] In the step S8, the prepared repair material is loaded into a sealed container, and the container material is selected from high-density polyethylene, which has good chemical resistance and sealing properties; during the packaging process, the ambient temperature is controlled between 20-25°C, and the humidity is controlled between 50%-60%; after packaging, the product information is marked, including production batch, production date, and expiration date; the storage place is selected in a cool, well-ventilated warehouse to avoid direct sunlight and high temperature, and the storage temperature is controlled between 5-25°C; the storage environment is checked regularly to ensure the stability of material performance.

[0038] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0039] 1. In the present invention, the intelligent curing agent, due to its unique composition, brings multiple beneficial effects to the repair of local damage to concrete components in power plants. Among them, polymer latex, as the main film-forming substance, forms a dense protective film, effectively locks in moisture, reduces water evaporation, and ensures that the repair material is fully maintained in the early stage of curing. The addition of nano-silicates further enhances the penetration ability of the curing agent, allowing it to penetrate into the concrete microstructure, react with cement hydration products, and form a more solid silicate hydrated gel, thereby improving the compactness and strength of the repair material. The effective ingredients of the moisturizer can continuously release moisture, maintain the wet state of the surface of the repair material, and are conducive to the continuous hydration of cement, avoiding cracking and strength loss caused by too fast drying. The film-forming aid optimizes the film-forming properties of the curing agent, making the protective film more uniform and dense, and improving the maintenance effect. The addition of antibacterial agents effectively inhibits the growth of microorganisms on the surface and inside of the repair material, prevents biological erosion, and ensures the long-term stability of the repair material. Anti-aging agents effectively resist the aging effects of environmental factors such as ultraviolet rays and oxygen on repair materials, extending the service life of repair materials.

[0040] 2. In the present invention, high-performance components such as nano-SiO2 cement, ultrafine quartz sand and epoxy resin modified polymer emulsion are used to give the material excellent mechanical properties and durability. The addition of nano-silicon dioxide additives and active nano-silica fume further improves the density and impermeability of the material, effectively preventing the invasion of moisture and harmful substances. In addition, the introduction of perlite self-expanding microspheres and carbon nanotube fibers enhances the material's crack resistance and toughness, and reduces cracking and deformation after construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a schematic diagram of the process principle of the present invention. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0043] Embodiment 1:

[0044] Reference Figure 1 , based on local damage repair materials of power plant concrete components, including:

[0045] Nano silicate cement: 80 parts by weight;

[0046] Ultrafine quartz sand (particle size 0-0.5 mm): 120 parts by weight;

[0047] Epoxy resin modified polymer emulsion: 25 parts by weight;

[0048] Nano silicon dioxide additive: 5 parts by weight;

[0049] Polycarboxylic acid polymer water reducer: 1.5 parts by weight;

[0050] Perlite self-expanding microspheres: 4 parts by weight;

[0051] Bio-based early strength agent alkali lignin: 1.5 parts by weight;

[0052] Carbon nanotube fiber: 0.8 parts by weight;

[0053] Active nano silica fume: 15 parts by weight;

[0054] Intelligent curing agent: 3 parts by weight;

[0055] Water: 25 parts by weight.

[0056] The intelligent curing agent comprises: 40 parts by weight of polymer latex, 10 parts by weight of nano silicate, 20 parts by weight of moisturizer, 5 parts by weight of film-forming aid, 4 parts by weight of antibacterial agent and 2 parts by weight of anti-aging agent;

[0057] The antibacterial agent includes: 0.5 weight part of tea tree oil, 0.5 weight part of peppermint oil, 0.5 weight part of lemongrass oil, 0.5 weight part of garlic extract, 0.5 weight part of thyme oil, 1 weight part of cinnamon oil, 0.5 weight part of rosemary oil,

[0058] The preparation method of the intelligent curing agent includes: firstly, weighing a moisturizer, a film-forming aid, an antibacterial agent and an anti-aging agent in proportion and placing them in a stirring container for pre-mixing to ensure that each component is evenly dispersed; then, diluting a polymer latex in another container in an appropriate amount for subsequent mixing; then, gradually adding the pre-mixed moisturizer, film-forming aid, antibacterial agent and anti-aging agent mixture into the diluted polymer latex, using a high-speed stirring device to fully stir to ensure that each component is completely fused to form a uniform mixture; then gradually adding nano-silicate into the above mixture, using a high-speed dispersing device to disperse, ensuring that the nano-silicate is evenly distributed in the mixture to avoid agglomeration; continuing to stir for a period of time until the mixture becomes uniform and fine, and adjusting the stirring speed and time as needed to achieve the best mixing effect; filtering the mixture through a filter to remove possible impurities and agglomerates to ensure the purity and uniformity of the final product, and thus obtaining the intelligent curing agent.

[0059] The local damage repair process based on the concrete components of the power plant is repaired using the repair material of the above embodiment, which specifically includes the following steps:

[0060] S1: Place nano-Silicate cement and ultrafine quartz sand (particle size 0-0.5 mm) in a dry mixing device according to a certain proportion, and perform dry mixing to ensure that the two powder materials are evenly mixed.

[0061] S2: In another container, epoxy resin modified polymer emulsion, polycarboxylic acid polymer water reducer, bio-based early strength agent alkali lignin and intelligent curing agent are mixed and pre-mixed using a low-speed stirring device to form a uniform liquid mixture.

[0062] S3: gradually adding nano-silicon dioxide additive and active nano-silica ash into the above liquid mixture, and dispersing them using high-speed dispersing equipment to ensure that the nano-materials are evenly distributed in the mixture to avoid agglomeration.

[0063] S4: gradually add the perlite self-expanding microspheres and carbon nanotube fibers into the mixture, and continue to stir using a high-speed stirring device to ensure that all solid particles are evenly dispersed in the liquid mixture.

[0064] S5: gradually add the dry-mixed nano-Silicate cement and ultrafine quartz sand mixture into the above liquid mixture, stirring while adding, and using a high-speed stirring device to fully stir to form a uniform slurry.

[0065] S6: As needed, gradually add water while stirring to adjust the consistency of the slurry to a state suitable for construction.

[0066] S7: The mixed slurry is subjected to vacuum degassing treatment to remove internal bubbles and ensure the density and strength of the repair material.

[0067] S8: Put the prepared repair material into a sealed container, label it with information such as product name, ingredients, production date and instructions for use, and store it in a cool, ventilated place, avoiding direct sunlight and high temperature.

[0068] In step S1, nano-Silicate cement and ultrafine quartz sand are added to the dry mixing equipment in proportion, and the equipment capacity is selected to be moderate to ensure that the materials can be fully tumbled without overflowing. Start the equipment, use frequency conversion speed regulation, set the initial speed to 60 rpm, and gradually increase to 120 rpm to avoid powder flying. During the stirring process, keep the ambient humidity between 40% and 60% to prevent the powder from absorbing moisture and agglomerating. The dry mixing time lasts for 15 minutes to ensure that the powder color is uniform and there are no agglomerates visible to the naked eye.

[0069] In step S2, in the premixing container, first add the epoxy resin modified polymer emulsion, then add the polycarboxylic acid polymer water reducer, the bio-based early strength agent alkali lignin and the intelligent curing agent in sequence. Use a low-speed stirring device with a speed controlled at 50 rpm to avoid excessive foaming. During the premixing process, the temperature is controlled between 20-25°C to ensure that each component is fully dissolved and dispersed. After stirring for 5 minutes, observe that there is no oil or precipitation on the surface of the mixed liquid, which is qualified.

[0070] In step S3, the nano silicon dioxide additive and the active nano silica ash are slowly added to the premixed solution, and a high-speed dispersion device is used, with the initial speed set to 500 rpm, gradually increased to 1500 rpm, to avoid the agglomeration of the nanomaterials. During the dispersion process, an ultrasonic assisted dispersion technology is used, with the frequency set to 20kHz and the power to 200W for 10 minutes. After the dispersion is completed, a small amount of the mixed solution is taken and placed under a microscope for observation to ensure that the nanoparticles are evenly distributed without agglomeration.

[0071] In step S4, the perlite self-expanding microspheres and the carbon nanotube fibers are gradually added to the mixture, and a high-speed stirring device is used, and the rotation speed is controlled at 1000 rpm. During the stirring process, an intermittent stirring method is adopted, and the machine is stopped and observed once every 5 minutes of stirring to ensure that the solid particles are evenly dispersed. The total stirring time is not less than 20 minutes, until the mixture presents a uniform slurry without obvious particle stratification.

[0072] In step S5, the dry-mixed nano-Silicate cement and ultrafine quartz sand mixture is gradually added to the liquid mixture, and a spiral stirring device is used, and the speed is controlled at 800 rpm. The feeding speed is controlled at 10% of the total amount added per minute to avoid uneven stirring caused by material impact. During the mixing process, the temperature is controlled between 25-30°C to ensure good material fluidity. After stirring for 30 minutes, a small amount of the mixture is taken for fluidity test to ensure that the design requirements are met.

[0073] In step S5, the dry-mixed nano-Silicate cement and ultrafine quartz sand mixture is gradually added to the liquid mixture, and a spiral stirring device is used, and the speed is controlled at 800 rpm. The feeding speed is controlled at 10% of the total amount added per minute to avoid uneven stirring caused by material impact. During the mixing process, the temperature is controlled between 25-30°C to ensure good material fluidity. After stirring for 30 minutes, a small amount of the mixture is taken for fluidity test to ensure that the design requirements are met.

[0074] In step S6, water is gradually added according to the construction requirements, and a low-speed stirring device is used, and the speed is controlled at 60 rpm. The amount of water added is adjusted according to the actual consistency of the slurry, and the amount of water added per minute is controlled at 1% of the total water volume by dripping. During the adjustment process, the fluidity of the slurry is monitored in real time, and the slump test method is used to ensure that the slump is between 180-220mm. After the adjustment is completed, stand for 5 minutes to observe whether there is no water seepage on the surface of the slurry.

[0075] In step S7, the mixed slurry is poured into a vacuum degassing device, the vacuum degree is set to 0.09 MPa, and the degassing time is 15 minutes. During the degassing process, an intermittent vacuuming method is used, and the vacuuming is performed once every 5 minutes for 1 minute to avoid splashing of the slurry. After the degassing is completed, it is observed that no bubbles are generated on the surface of the slurry, and a small amount of slurry is taken for density testing to ensure that the density meets the design requirements.

[0076] In step S8, the prepared repair material is placed in a sealed container. The container material is high-density polyethylene (HDPE), which has good chemical resistance and sealing properties. During the packaging process, the ambient temperature is controlled between 20-25°C and the humidity is controlled between 50%-60%. After packaging, the product information is marked, including production batch, production date, expiration date, etc. The storage place should be a cool, well-ventilated warehouse, avoiding direct sunlight and high temperature, and the storage temperature should be controlled between 5-25°C. Check the storage environment regularly to ensure stable material performance.

[0077] In the present invention, the intelligent curing agent, due to its unique composition, brings multiple beneficial effects to the repair of local damage to concrete components of power plants. Among them, polymer latex, as the main film-forming substance, forms a dense protective film, effectively locks moisture, reduces water evaporation, and ensures that the repair material is fully maintained in the early stage of curing. The addition of nano-silicate further enhances the penetration ability of the curing agent, allowing it to penetrate into the concrete microstructure, react with cement hydration products, and form a more solid silicate hydrated gel, thereby improving the compactness and strength of the repair material. The effective ingredients of the moisturizer can continuously release moisture, maintain the wet state of the surface of the repair material, and are conducive to the continuous hydration of cement, avoiding cracking and strength loss caused by drying too fast. The film-forming aid optimizes the film-forming performance of the curing agent, making the protective film more uniform and dense, and improving the curing effect. The addition of the antibacterial agent effectively inhibits the growth of microorganisms on the surface and inside of the repair material, prevents biological erosion, and ensures the long-term stability of the repair material. The anti-aging agent effectively resists the aging effect of environmental factors such as ultraviolet rays and oxygen on the repair material, and prolongs the service life of the repair material.

[0078] In the present invention, high-performance components such as nano-SiO2 cement, ultrafine quartz sand and epoxy resin modified polymer emulsion are used to give the material excellent mechanical properties and durability. The addition of nano-silicon dioxide additives and active nano-silica fume further improves the density and impermeability of the material, effectively preventing the invasion of moisture and harmful substances. In addition, the introduction of perlite self-expanding microspheres and carbon nanotube fibers enhances the material's crack resistance and toughness, and reduces cracking and deformation after construction.

[0079] Embodiment 2:

[0080] Reference Figure 1 , based on local damage repair materials of power plant concrete components, including:

[0081] Nano silicate cement: 80 parts by weight;

[0082] Ultrafine quartz sand (particle size 0-0.5 mm): 120 parts by weight;

[0083] Epoxy resin modified polymer emulsion: 25 parts by weight;

[0084] Nano silicon dioxide additive: 5 parts by weight;

[0085] Polycarboxylic acid polymer water reducer: 1.5 parts by weight;

[0086] Perlite self-expanding microspheres: 4 parts by weight;

[0087] Bio-based early strength agent alkali lignin: 1.5 parts by weight;

[0088] Carbon nanotube fiber: 0.8 parts by weight;

[0089] Active nano silica fume: 15 parts by weight;

[0090] Intelligent curing agent: 3 parts by weight;

[0091] 40 parts by weight of water.

[0092] The intelligent curing agent comprises: 40 parts by weight of polymer latex, 10 parts by weight of nano silicate, 20 parts by weight of moisturizer, 5 parts by weight of film-forming aid, 4 parts by weight of antibacterial agent and 2 parts by weight of anti-aging agent;

[0093] The antibacterial agent includes: 0.5 weight part of tea tree oil, 0.5 weight part of peppermint oil, 0.5 weight part of lemongrass oil, 0.5 weight part of garlic extract, 0.5 weight part of thyme oil, 1 weight part of cinnamon oil, 0.5 weight part of rosemary oil,

[0094] The preparation method of the intelligent curing agent includes: firstly, weighing a moisturizer, a film-forming aid, an antibacterial agent and an anti-aging agent in proportion and placing them in a stirring container for pre-mixing to ensure that each component is evenly dispersed; then, diluting a polymer latex in another container in an appropriate amount for subsequent mixing; then, gradually adding the pre-mixed moisturizer, film-forming aid, antibacterial agent and anti-aging agent mixture into the diluted polymer latex, using a high-speed stirring device to fully stir to ensure that each component is completely fused to form a uniform mixture; then gradually adding nano-silicate into the above mixture, using a high-speed dispersing device to disperse, ensuring that the nano-silicate is evenly distributed in the mixture to avoid agglomeration; continuing to stir for a period of time until the mixture becomes uniform and fine, and adjusting the stirring speed and time as needed to achieve the best mixing effect; filtering the mixture through a filter to remove possible impurities and agglomerates to ensure the purity and uniformity of the final product, and thus obtaining the intelligent curing agent.

[0095] The local damage repair process based on the concrete components of the power plant is repaired using the repair material of the above embodiment, which specifically includes the following steps:

[0096] S1: Place nano-Silicate cement and ultrafine quartz sand (particle size 0-0.5 mm) in a dry mixing device according to a certain proportion, and perform dry mixing to ensure that the two powder materials are evenly mixed.

[0097] S2: In another container, epoxy resin modified polymer emulsion, polycarboxylic acid polymer water reducer, bio-based early strength agent alkali lignin and intelligent curing agent are mixed and pre-mixed using a low-speed stirring device to form a uniform liquid mixture.

[0098] S3: gradually adding nano-silicon dioxide additive and active nano-silica ash into the above liquid mixture, and dispersing them using high-speed dispersing equipment to ensure that the nano-materials are evenly distributed in the mixture to avoid agglomeration.

[0099] S4: gradually add the perlite self-expanding microspheres and carbon nanotube fibers into the mixture, and continue to stir using a high-speed stirring device to ensure that all solid particles are evenly dispersed in the liquid mixture.

[0100] S5: gradually add the dry-mixed nano-Silicate cement and ultrafine quartz sand mixture into the above liquid mixture, stirring while adding, and using a high-speed stirring device to fully stir to form a uniform slurry.

[0101] S6: As needed, gradually add water while stirring to adjust the consistency of the slurry to a state suitable for construction.

[0102] S7: The mixed slurry is subjected to vacuum degassing treatment to remove internal bubbles and ensure the density and strength of the repair material.

[0103] S8: Put the prepared repair material into a sealed container, label it with information such as product name, ingredients, production date and instructions for use, and store it in a cool, ventilated place, avoiding direct sunlight and high temperature.

[0104] In step S1, nano-Silicate cement and ultrafine quartz sand are added to the dry mixing equipment in proportion, and the equipment capacity is selected to be moderate to ensure that the materials can be fully tumbled without overflowing. Start the equipment, use frequency conversion speed regulation, set the initial speed to 60 rpm, and gradually increase to 120 rpm to avoid powder flying. During the stirring process, keep the ambient humidity between 40% and 60% to prevent the powder from absorbing moisture and agglomerating. The dry mixing time lasts for 15 minutes to ensure that the powder color is uniform and there are no agglomerates visible to the naked eye.

[0105] In step S2, in the premixing container, first add the epoxy resin modified polymer emulsion, then add the polycarboxylic acid polymer water reducer, the bio-based early strength agent alkali lignin and the intelligent curing agent in sequence. Use a low-speed stirring device with a speed controlled at 50 rpm to avoid excessive foaming. During the premixing process, the temperature is controlled between 20-25°C to ensure that each component is fully dissolved and dispersed. After stirring for 5 minutes, observe that there is no oil or precipitation on the surface of the mixed liquid, which is qualified.

[0106] In step S3, the nano silicon dioxide additive and the active nano silica ash are slowly added to the premixed solution, and a high-speed dispersion device is used, with the initial speed set to 500 rpm, gradually increased to 1500 rpm, to avoid the agglomeration of the nanomaterials. During the dispersion process, an ultrasonic assisted dispersion technology is used, with the frequency set to 20kHz and the power to 200W for 10 minutes. After the dispersion is completed, a small amount of the mixed solution is taken and placed under a microscope for observation to ensure that the nanoparticles are evenly distributed without agglomeration.

[0107] In step S4, the perlite self-expanding microspheres and the carbon nanotube fibers are gradually added to the mixture, and a high-speed stirring device is used, and the rotation speed is controlled at 1000 rpm. During the stirring process, an intermittent stirring method is adopted, and the machine is stopped and observed once every 5 minutes of stirring to ensure that the solid particles are evenly dispersed. The total stirring time is not less than 20 minutes, until the mixture presents a uniform slurry without obvious particle stratification.

[0108] In step S5, the dry-mixed nano-Silicate cement and ultrafine quartz sand mixture is gradually added to the liquid mixture, and a spiral stirring device is used, and the speed is controlled at 800 rpm. The feeding speed is controlled at 10% of the total amount added per minute to avoid uneven stirring caused by material impact. During the mixing process, the temperature is controlled between 25-30°C to ensure good material fluidity. After stirring for 30 minutes, a small amount of the mixture is taken for fluidity test to ensure that the design requirements are met.

[0109] In step S5, the dry-mixed nano-Silicate cement and ultrafine quartz sand mixture is gradually added to the liquid mixture, and a spiral stirring device is used, and the speed is controlled at 800 rpm. The feeding speed is controlled at 10% of the total amount added per minute to avoid uneven stirring caused by material impact. During the mixing process, the temperature is controlled between 25-30°C to ensure good material fluidity. After stirring for 30 minutes, a small amount of the mixture is taken for fluidity test to ensure that the design requirements are met.

[0110] In step S6, water is gradually added according to the construction requirements, and a low-speed stirring device is used, and the speed is controlled at 60 rpm. The amount of water added is adjusted according to the actual consistency of the slurry, and the amount of water added per minute is controlled at 1% of the total water volume by dripping. During the adjustment process, the fluidity of the slurry is monitored in real time, and the slump test method is used to ensure that the slump is between 180-220mm. After the adjustment is completed, stand for 5 minutes to observe whether there is no water seepage on the surface of the slurry.

[0111] In step S7, the mixed slurry is poured into a vacuum degassing device, the vacuum degree is set to 0.09 MPa, and the degassing time is 15 minutes. During the degassing process, an intermittent vacuuming method is used, and the vacuuming is performed once every 5 minutes for 1 minute to avoid splashing of the slurry. After the degassing is completed, it is observed that no bubbles are generated on the surface of the slurry, and a small amount of slurry is taken for density testing to ensure that the density meets the design requirements.

[0112] In step S8, the prepared repair material is placed in a sealed container. The container material is high-density polyethylene (HDPE), which has good chemical resistance and sealing properties. During the packaging process, the ambient temperature is controlled between 20-25°C and the humidity is controlled between 50%-60%. After packaging, the product information is marked, including production batch, production date, expiration date, etc. The storage place should be a cool, well-ventilated warehouse, avoiding direct sunlight and high temperature, and the storage temperature should be controlled between 5-25°C. Check the storage environment regularly to ensure stable material performance.

[0113] In the present invention, the intelligent curing agent, due to its unique composition, brings multiple beneficial effects to the local damage repair of concrete components in power plants. Among them, polymer latex, as the main film-forming substance, forms a dense protective film, effectively locks moisture, reduces water evaporation, and ensures that the repair material is fully maintained in the early stage of curing. The addition of nano-silicate further enhances the penetration ability of the curing agent, allowing it to penetrate into the concrete microstructure, react with cement hydration products, and form a more solid silicate hydrated gel, thereby improving the compactness and strength of the repair material. The effective ingredients of the moisturizer can continuously release moisture, maintain the wet state of the surface of the repair material, and are conducive to the continuous hydration of cement, avoiding cracking and strength loss caused by drying too fast. The film-forming aid optimizes the film-forming performance of the curing agent, making the protective film more uniform and dense, and improving the curing effect. The addition of the antibacterial agent effectively inhibits the growth of microorganisms on the surface and inside of the repair material, prevents biological erosion, and ensures the long-term stability of the repair material. The anti-aging agent effectively resists the aging effect of environmental factors such as ultraviolet rays and oxygen on the repair material, and prolongs the service life of the repair material.

[0114] In the present invention, high-performance components such as nano-SiO2 cement, ultrafine quartz sand and epoxy resin modified polymer emulsion are used to give the material excellent mechanical properties and durability. The addition of nano-silicon dioxide additives and active nano-silica fume further improves the density and impermeability of the material, effectively preventing the invasion of moisture and harmful substances. In addition, the introduction of perlite self-expanding microspheres and carbon nanotube fibers enhances the material's crack resistance and toughness, and reduces cracking and deformation after construction.

[0115] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprises" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0116] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. Local damage repair material based on concrete components of power plants, characterized by: include: Nano silicate cement: 80 parts by weight; Ultrafine quartz sand with a particle size of 0-0.5 mm: 120 parts by weight; Epoxy resin modified polymer emulsion: 25 parts by weight; Nano silicon dioxide additive: 5 parts by weight; Polycarboxylic acid polymer water reducer: 1.5 parts by weight; Perlite self-expanding microspheres: 4 parts by weight; Bio-based early strength agent alkali lignin: 1.5 parts by weight; Carbon nanotube fiber: 0.8 parts by weight; Active nano silica fume: 15 parts by weight; Intelligent curing agent: 3 parts by weight; Water: 25-40 parts by weight.

2. The local damage repair material based on the concrete component of a power plant according to claim 1, characterized in that: The intelligent curing agent comprises: 40 parts by weight of polymer latex, 10 parts by weight of nano silicate, 20 parts by weight of moisturizer, 5 parts by weight of film-forming aid, 4 parts by weight of antibacterial agent and 2 parts by weight of anti-aging agent; The antibacterial agent includes: 0.5 weight part of tea tree oil, 0.5 weight part of peppermint oil, 0.5 weight part of lemongrass oil, 0.5 weight part of garlic extract, 0.5 weight part of thyme oil, 1 weight part of cinnamon oil, 0.5 weight part of rosemary oil, The preparation method of the intelligent curing agent includes: firstly, weighing a moisturizer, a film-forming aid, an antibacterial agent and an anti-aging agent in proportion and placing them in a stirring container for pre-mixing to ensure that each component is evenly dispersed; then, diluting a polymer latex in another container in an appropriate amount for subsequent mixing; then, gradually adding the pre-mixed moisturizer, film-forming aid, antibacterial agent and anti-aging agent mixture into the diluted polymer latex, using a high-speed stirring device to fully stir to ensure that each component is completely fused to form a uniform mixture; then gradually adding nano-silicate into the above mixture, using a high-speed dispersing device to disperse, ensuring that the nano-silicate is evenly distributed in the mixture to avoid agglomeration; continuing to stir for a period of time until the mixture becomes uniform and fine, and adjusting the stirring speed and time as needed to achieve the best mixing effect; filtering the mixture through a filter to remove possible impurities and agglomerates to ensure the purity and uniformity of the final product, and thus obtaining the intelligent curing agent.

3. The local damage repair process based on concrete components of a power plant according to claim 1 is characterized in that: The repair process uses the local damage repair material based on the concrete components of the power plant as described in any one of claims 1 to 2 for repair, and specifically includes the following steps: S1: Put nano-Silicate cement and ultra-fine quartz sand into a dry mixing device according to proportion, and perform dry mixing to ensure that the two powder materials are evenly mixed; S2: In another container, epoxy resin modified polymer emulsion, polycarboxylic acid polymer water reducer, bio-based early strength agent alkali lignin and intelligent curing agent are mixed and pre-mixed using a low-speed stirring device to form a uniform liquid mixture; S3: gradually adding the nano-silicon dioxide additive and the active nano-silicon ash to the above liquid mixture, and dispersing them using a high-speed dispersing device to ensure that the nano-materials are evenly distributed in the mixture to avoid agglomeration; S4: gradually adding perlite self-expanding microspheres and carbon nanotube fibers into the mixture, and continuing to stir using a high-speed stirring device to ensure that all solid particles are evenly dispersed in the liquid mixture; S5: gradually adding the dry-mixed nano-Silicate cement and ultrafine quartz sand mixture into the liquid mixture, stirring while adding, and using a high-speed stirring device to fully stir to form a uniform slurry; S6: Add water gradually as needed, stirring while adding, and adjust the consistency of the slurry to a state suitable for construction; S7: Perform vacuum degassing on the mixed slurry to remove internal bubbles and ensure the density and strength of the repair material; S8: Place the prepared repair material into a sealed container, label it with the product name, ingredients, production date and instructions for use, and store it in a cool, ventilated place, avoiding direct sunlight and high temperature.

4. The local damage repair process based on concrete components of a power plant according to claim 1 is characterized in that: In the step S1, nano-Silicate cement and ultrafine quartz sand are added to a dry mixing device in proportion, and the capacity of the device is selected to be moderate to ensure that the materials can be fully tumbled without overflowing; the device is started, and the frequency conversion speed regulation is adopted, and the initial speed is set to 60 rpm, and gradually increased to 120 rpm to avoid powder flying; During the mixing process, the ambient humidity was maintained between 40% and 60% to prevent the powder from absorbing moisture and agglomerating; the dry mixing time was continued for 15 minutes to ensure that the powder color was uniform and there were no agglomerates visible to the naked eye.

5. The local damage repair process based on concrete components of a power plant according to claim 1 is characterized in that: In the step S2, epoxy resin modified polymer emulsion is first added to the premixing container, and then polycarboxylic acid polymer water reducer, bio-based early strength agent alkali lignin and intelligent curing agent are added in sequence; a low-speed stirring device is used, and the rotation speed is controlled at 50 rpm to avoid excessive foaming; during the premixing process, the temperature is controlled between 20-25° C. to ensure that each component is fully dissolved and dispersed; after stirring for 5 minutes, the surface of the mixed liquid is observed to be free of oil spots and precipitation, which is qualified.

6. The local damage repair process based on concrete components of a power plant according to claim 1 is characterized in that: In the step S3, the nano-silicon dioxide additive and the active nano-silica ash are slowly added to the premixed liquid, and a high-speed dispersing device is used, with the initial speed set to 500 rpm and gradually increased to 1500 rpm to avoid agglomeration of the nanomaterials; during the dispersing process, ultrasonic assisted dispersing technology is used, with the frequency set to 20 kHz and the power to 200 W for 10 minutes; after the dispersion is completed, a small amount of the mixed liquid is taken and placed under a microscope for observation to ensure that the nanoparticles are evenly distributed and there is no agglomeration.

7. The local damage repair process based on concrete components of a power plant according to claim 1 is characterized in that: In the step S4, the perlite self-expanding microspheres and the carbon nanotube fibers are gradually added to the mixture, and a high-speed stirring device is used with the rotation speed controlled at 1000 rpm; during the stirring process, an intermittent stirring method is adopted, and the stirring is stopped and observed once every 5 minutes to ensure that the solid particles are evenly dispersed; the total stirring time is not less than 20 minutes, until the mixture presents a uniform slurry without obvious particle stratification.

8. The local damage repair process based on concrete components of a power plant according to claim 1 is characterized in that: In step S5, the dry-mixed mixture of nano-Silicate cement and ultrafine quartz sand is gradually added to the liquid mixture, and a spiral stirring device is used with a rotation speed controlled at 800 rpm; the feeding speed is controlled at 10% of the total amount added per minute to avoid uneven stirring caused by material impact; during the mixing process, the temperature is controlled between 25-30° C. to ensure good material fluidity; after stirring for 30 minutes, a small amount of the mixture is taken for fluidity test to ensure that the design requirements are met.

9. The local damage repair process based on concrete components of a power plant according to claim 1, characterized in that: In the step S5, the dry-mixed mixture of nano-Silicate cement and ultrafine quartz sand is gradually added to the liquid mixture, and a spiral stirring device is used with a rotation speed controlled at 800 rpm; the feeding speed is controlled at 10% of the total amount added per minute, and the temperature is controlled between 25-30° C. during the mixing process to ensure good material fluidity; after stirring for 30 minutes, a small amount of the mixture is taken for a fluidity test to ensure that the design requirements are met.

10. The local damage repair process and material based on the concrete components of a power plant according to claim 1, characterized in that: In the step S6, water is gradually added according to the construction requirements, and a low-speed stirring device is used, and the rotation speed is controlled at 60 rpm; the amount of water added is adjusted according to the actual consistency of the slurry, and the amount of water added per minute is controlled at 1% of the total water volume by dripping; during the adjustment process, the fluidity of the slurry is monitored in real time, and the slump test method is used to ensure that the slump is between 180-220 mm; after the adjustment is completed, the slurry is left to stand for 5 minutes to observe whether there is water seepage on the surface of the slurry.

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