Processing method convenient for recycling waste fan blade material

Abstract

The invention belongs to the technical field of crushing and regeneration, and particularly relates to a processing method convenient for recycling waste fan blade materials, which comprises the following steps: S1, a pretreatment stage; s2, a particle crushing and fiber crushing stage; s3, a mixing and compounding stage; s4, a forming and pre-burying stage; s5, a curing and pouring stage; according to the processing method convenient for recycling the waste fan blade material, the waste fan blades are respectively crushed into particles and fibers according to different application requirements, so that different requirements of building bricks, wallboard filling and concrete reinforcement are met, and the utilization efficiency and the application effect of the material are improved; meanwhile, the tensile strength and bending strength of the concrete can be remarkably improved and the mechanical property of the material can be improved by adding the fibrous material, and the toughness of bricks and wallboards can be improved and cracks can be reduced by adding the granular material, so that the impact resistance of the bricks and wallboards is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of crushing and regeneration, and particularly relates to a processing method for regenerating and utilizing waste fan blade materials. BACKGROUND

[0002] The waste fan blade is mainly made of recyclable materials such as glass fiber, carbon fiber and balsa wood. With the rapid development of wind power generation industry, the wind power equipment is updated and replaced at an accelerated speed, and the first batch of fan blades has gradually entered the retirement stage. If the waste fan blades are not properly treated, a large amount of land resources will be occupied, and the soil and water source will be easily polluted. In order to reduce the accumulation of waste and reduce environmental pollution and resource waste, the waste fan blades are usually crushed and then made into composite materials for use in the building field. Therefore, a processing method for regenerating and utilizing waste fan blade materials is needed. SUMMARY

[0003] In order to make up for the deficiencies of the prior art and solve at least one technical problem in the background art.

[0004] The technical scheme adopted by the application to solve the technical problems is that the processing method for regenerating and utilizing waste fan blade materials comprises the following steps: S1, a pretreatment stage: cleaning the waste fan blades to remove the impurities and coating attached to the surface; S2, a particle crushing and fiber crushing stage: S201, crushing the cleaned waste fan blades into granular materials according to the filling requirements of building bricks and wallboards; S202, crushing the cleaned waste fan blades into fibrous materials according to the reinforcing requirements of concrete; S3, a mixing and compounding stage: S301, mixing the obtained granular materials with cement, aggregates and additives in proportion; The powder obtained after the S301 stage mixing comprises the following components in weight parts: 20-50 parts of fan blade particles, 15-30 parts of cement, 30-60 parts of aggregates and 2-10 parts of additives, and the additives include water reducing agent, early strength agent, retarder and air entraining agent; S302, compounding the obtained fibrous materials with a resin matrix to prepare a fiber reinforced bar; S4, a forming and pre-embedding stage: S401, adopting a press forming process to make the mixed granular raw materials into the shape of bricks or wallboards; S402, pre-embedding the fiber reinforced bar in concrete according to preset requirements; S5, a solidification and pouring stage: S501. The bricks or wall panels are gradually solidified and molded through steam curing, and then they reach a fixed strength. S502. Pour concrete and cure it to make the fiber-reinforced bars and concrete form a whole.

[0005] Furthermore, the S1 pretreatment stage uses a combination of physical and chemical methods to clean the waste fan blades. The physical method includes rinsing with a high-pressure water gun to remove loose impurities from the surface using the impact force of the high-pressure water flow. The chemical method involves soaking the impurities or coatings in a suitable solvent or cleaning agent according to their properties to dissolve or remove them, followed by rinsing with water and drying.

[0006] Furthermore, in stage S201, the crushing of granular materials is carried out by a combination of jaw crusher and impact crusher, that is, the jaw crusher is used to coarsely crush the raw materials, and then the impact crusher is used to finely crush the coarsely crushed raw materials. In stage S202, the crushing of fibrous materials is carried out by shear crusher.

[0007] Furthermore, the composite processing flow of S302 includes: Surface treatment: Silane coupling agents are used to modify the surface of fiber materials to improve their bonding performance; Resin matrix treatment: Select epoxy resin and add curing agent and accelerator according to the formula requirements, while stirring and mixing them. Impregnation treatment: The treated fiber material is immersed in the mixed resin matrix to fully impregnate the fiber with resin; Molding process: The resin-impregnated fiber material is pultruded or wound into the shape of fiber-reinforced ribs through pultrusion and winding processes; Curing treatment: Based on the characteristics of the resin, the resin is completely cured under set temperature and time conditions, so that the fiber and resin form a whole, i.e., fiber-reinforced rib.

[0008] Furthermore, the compression molding process of S401 is as follows: The mixed granular raw materials are placed into a pre-designed mold, the shape and size of which are made according to the requirements of the bricks or wall panels. A certain pressure is applied to the granular raw material in the mold by a press. Under the action of pressure, the granular raw material is compacted, the internal air is expelled, and it is formed into a brick or wall panel shape with a certain density and strength. After the pressure holding period is over, demold the finished product and remove it from the mold.

[0009] Furthermore, the pre-embedding of S402 requires determining the position and spacing of the fiber reinforcement bars, that is, setting a positioning device inside the formwork for pouring concrete, accurately placing the fiber reinforcement bars on the positioning device to ensure that their position in the concrete is accurate, and at the same time ensuring that the reinforcement bars are neatly arranged during the placement process.

[0010] Furthermore, the steam curing in stage S501 includes the following process: Static curing: After the bricks or wall panels are formed, they are allowed to stand at room temperature for 2-6 hours to allow the surface of the bricks or wall panels to harden initially. Heating: Place the bricks or wall panels that have been left to stand still into the steam curing chamber and slowly increase the temperature at a rate of 15℃-20℃ per hour for 2-4 hours. Constant temperature: Once the temperature reaches the set curing temperature, maintain a constant temperature of 60℃-80℃ for 4-8 hours to allow the cementitious materials to fully hydrate. Cooling: After the constant temperature period ends, slowly cool down at a rate of 15℃-20℃ per hour for 2-4 hours. When the surface temperature of the brick or wall panel is less than 20℃ different from the ambient temperature, remove it from the curing room.

[0011] Furthermore, the process of pouring concrete in S502 includes: Preparation: Check whether the pre-embedded position of the fiber-reinforced bars is accurate and ensure that it meets the design requirements; clean the debris and water inside the formwork, wet the formwork and reinforcing bars, and ensure that there is no water inside the formwork; Layered pouring: The concrete is poured in layers according to the falling height of the concrete and the performance of the vibrating equipment; Vibration: Use a vibrator to vibrate the concrete. The vibration time should be determined according to the slump of the concrete and the performance of the vibration equipment. The vibration time is 20-30 seconds, until the concrete surface shows a layer of slurry and no longer sinks significantly. During the vibration process, care should be taken to avoid colliding with the fiber reinforcement bars. Surface treatment: Before the concrete initially sets, the concrete surface is troweled to eliminate surface cracks and bleeding, making the surface smooth and dense. Concrete placement: The concrete temperature should be between 5℃ and 30℃ when placed in the formwork.

[0012] Furthermore, the curing temperature range of S502 is 10℃-20℃, and the curing process includes: Covering and moisturizing: After the concrete is poured, cover and moisturize it in time. Covering materials include plastic film, straw mats and burlap sacks. Regular watering: On the basis of covering, water the concrete surface regularly, 2-6 times a day.

[0013] The beneficial effects of this invention are as follows: 1. Based on different application requirements, waste fan blades are crushed into granules and fibers respectively, which meets the different requirements of building bricks, wall panels filling and concrete reinforcement, improves the utilization efficiency and application effect of materials. At the same time, the addition of fibrous materials can significantly improve the tensile and compressive strength of concrete and improve the mechanical properties of materials. The addition of granular materials can improve the toughness of bricks and wall panels, reduce the generation of cracks, and thus improve the impact resistance of bricks and wall panels. 2. Using crushed waste fan blades as building materials reduces raw material procurement costs and waste disposal expenses, thereby lowering the overall production costs of building bricks, wall panels, and concrete products, which helps improve the economic benefits of enterprises. Furthermore, processing waste fan blades into building materials helps reduce environmental pollution from waste, thus achieving resource recycling. Attached Figure Description

[0014] The invention will now be further described with reference to the accompanying drawings.

[0015] Figure 1 This is an overall flowchart of a method for recycling and processing waste fan blade materials according to the present invention. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and 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.

[0017] Please see Figure 1 , This embodiment provides: A method for recycling waste fan blade materials, used in the processing of building bricks and wall panels, includes the following steps: Pre-treatment stage: Cleaning the waste fan blades to remove impurities and coatings adhering to the surface; The pretreatment stage uses a combination of physical and chemical methods to clean the waste fan blades. The physical method includes rinsing with a high-pressure water gun to remove loose impurities from the surface using the impact force of the high-pressure water flow. The chemical method involves soaking the blades in a suitable solvent or cleaning agent based on the properties of the impurities and coatings to dissolve or remove them. After that, the blades are rinsed with water and dried.

[0018] Granulation stage: The cleaned waste fan blades are crushed into granules according to the filling requirements of building bricks and wall panels; The crushing of granular materials is carried out by a combination of jaw crusher and impact crusher. That is, the jaw crusher is used to coarsely crush the raw materials, and then the impact crusher is used to finely crush the coarsely crushed raw materials. At the same time, the output particle size, i.e. the degree of fine crushing, can be adjusted as needed.

[0019] Mixing phase: The resulting granular material is mixed with cement, aggregate and additives in a certain proportion; The mixed powder comprises the following components by weight: 20-50 parts fan blade particles, 15-30 parts cement, 30-60 parts aggregate, and 2-10 parts additives, including water-reducing agents, early-strength agents, retarder and air-entraining agents.

[0020] Molding stage: The mixed granular raw materials are formed into the shape of bricks or wall panels using a pressing molding process. The compression molding process is as follows: The mixed granular raw materials are placed into a pre-designed mold, the shape and size of which are made according to the requirements of the bricks or wall panels. A certain pressure is applied to the granular raw material in the mold by a press. Under the action of pressure, the granular raw material is compacted, the internal air is expelled, and it is formed into a brick or wall panel shape with a certain density and strength. After the pressure holding period is over, the finished product, namely building bricks and wall panels, is removed from the mold.

[0021] Curing stage: Steam curing is used to gradually solidify and shape bricks or wall panels after they have been formed, and to bring them to a fixed strength. Steam curing includes the following process: Static curing: After the bricks or wall panels are formed, they are allowed to stand at room temperature for 2-6 hours to allow the surface of the bricks or wall panels to harden initially. Heating: Place the bricks or wall panels that have been left to stand still into the steam curing chamber and slowly increase the temperature at a rate of 15℃-20℃ per hour for 2-4 hours. Constant temperature: Once the temperature reaches the set curing temperature, maintain a constant temperature of 60℃-80℃ for 4-8 hours to allow the cementitious materials to fully hydrate. Cooling: After the constant temperature period ends, slowly cool down at a rate of 15℃-20℃ per hour for 2-4 hours. When the surface temperature of the brick or wall panel is less than 20℃ different from the ambient temperature, remove it from the curing room.

[0022] Its use cases include: Construction: Used for building houses, walls, road paving, etc. Waste fan blades are processed into building bricks and wall panels as building materials to replace traditional bricks and wall panels, realize resource reuse, reduce construction costs, and reduce the exploitation of natural resources. Temporary building construction: In the construction of some temporary buildings, such as temporary dormitories and warehouses on construction sites, the use of these recycled bricks and wall panels can complete the construction quickly and economically, and the materials can be further recycled after demolition. Landscape engineering: Used for the construction of walls, walkways, flower beds, etc. in parks, squares and other landscape projects, which not only meets the needs of landscape construction, but also reflects the concept of environmental protection.

[0023] A method for facilitating the recycling and reuse of waste fan blade materials to enhance the strength of concrete includes the following steps: Pre-treatment stage: Cleaning the waste fan blades to remove impurities and coatings adhering to the surface; The cleaning of waste fan blades is carried out using a combination of physical and chemical methods. The physical method includes rinsing with a high-pressure water gun to remove loose impurities from the surface by using the impact force of the high-pressure water flow. The chemical method involves soaking the blades in a suitable solvent or cleaning agent according to the nature of the impurities and coatings to dissolve or remove them. After that, the blades are rinsed with water and dried.

[0024] Fiber crushing stage: The cleaned waste fan blades are shredded into fibers according to the reinforcement requirements of the concrete. Shear crushers are used to crush fibrous materials.

[0025] Composite stage: The obtained fibrous material is composited with a resin matrix to prepare fiber-reinforced ribs; The composite processing flow includes: Surface treatment: Silane coupling agents are used to modify the surface of fiber materials to improve their bonding performance; Resin matrix treatment: Select epoxy resin and add curing agent and accelerator according to the formula requirements, while stirring and mixing them. Impregnation treatment: The treated fiber material is immersed in the mixed resin matrix to fully impregnate the fiber with resin; Molding process: The resin-impregnated fiber material is pultruded or wound into the shape of fiber-reinforced ribs through pultrusion and winding processes; Curing treatment: Based on the characteristics of the resin, the resin is completely cured under set temperature and time conditions, so that the fiber and resin form a whole, i.e., fiber-reinforced rib.

[0026] Pre-embedding stage: The fiber-reinforced bars are embedded in the concrete according to the preset requirements; Pre-embedding requires determining the position and spacing of the fiber reinforcement bars. This involves setting up positioning devices inside the formwork for pouring concrete, accurately placing the fiber reinforcement bars on the positioning devices to ensure their accurate position in the concrete, and ensuring that the reinforcement bars are neatly arranged during placement.

[0027] Pouring stage: Pour concrete and cure it to make the fiber-reinforced bars and concrete form a whole; The process of pouring concrete includes: Preparation: Check whether the pre-embedded position of the fiber-reinforced bars is accurate and ensure that it meets the design requirements; clean the debris and water inside the formwork, wet the formwork and reinforcing bars, and ensure that there is no water inside the formwork; Layered pouring: The concrete is poured in layers according to the falling height of the concrete and the performance of the vibrating equipment; Vibration: Use a vibrator to vibrate the concrete. The vibration time should be determined according to the slump of the concrete and the performance of the vibration equipment. The vibration time is 20-30 seconds, until the concrete surface shows a layer of slurry and no longer sinks significantly. During the vibration process, care should be taken to avoid colliding with the fiber reinforcement bars. Surface treatment: Before the concrete initially sets, the concrete surface is troweled to eliminate surface cracks and bleeding, making the surface smooth and dense. Concrete placement: The concrete temperature should be between 5℃ and 30℃ when placed in the formwork.

[0028] The curing temperature range is 10℃-20℃, and the curing process includes: Covering and moisturizing: After the concrete is poured, cover and moisturize it in time. Covering materials include plastic film, straw mats and burlap sacks. Regular watering: On the basis of covering, water the concrete surface regularly, 2-6 times a day.

[0029] Its use cases include: High-rise buildings: In the concrete structure of high-rise buildings, such as beams, columns, and floor slabs, pre-embedded fiber-reinforced bars can improve the tensile strength of concrete and enhance the overall stability and seismic performance of the building. Bridge engineering: Bridge piers, bridge decks and other parts need to withstand large loads and complex stresses. Using fiber-reinforced concrete can effectively improve the load-bearing capacity and durability of bridges and extend their service life. Large-scale infrastructure: In the construction of large-scale infrastructure such as tunnels and dams, the use of this reinforced concrete can better cope with complex geological conditions and harsh environmental factors, ensuring the safety and stability of the project. Example 1

[0030] A method for recycling waste fan blade materials, used in the processing of building bricks and wall panels, includes the following steps: Pre-treatment stage: Cleaning the waste fan blades to remove impurities and coatings adhering to the surface; The pretreatment stage uses a combination of physical and chemical methods to clean the waste fan blades. The physical method includes rinsing with a high-pressure water gun to remove loose impurities from the surface using the impact force of the high-pressure water flow. The chemical method involves soaking the blades in a suitable solvent or cleaning agent based on the properties of the impurities and coatings to dissolve or remove them. After that, the blades are rinsed with water and dried.

[0031] Granulation stage: The cleaned waste fan blades are crushed into granules according to the filling requirements of building bricks and wall panels; The crushing of granular materials is carried out by a combination of jaw crusher and impact crusher. That is, the jaw crusher is used to coarsely crush the raw materials, and then the impact crusher is used to finely crush the coarsely crushed raw materials. At the same time, the output particle size, i.e. the degree of fine crushing, can be adjusted as needed.

[0032] Mixing phase: The resulting granular material is mixed with cement, aggregate and additives in a certain proportion; The mixed powder comprises the following components by weight: 22 parts fan blade particles, 17 parts cement, 35 parts aggregate, and 4 parts additives, including water-reducing agent, early-strength agent, retarder and air-entraining agent.

[0033] Molding stage: Using a pressing molding process, the mixed granular raw materials are shaped into bricks or wall panels. The compression molding process is as follows: The mixed granular raw materials are placed into a pre-designed mold, the shape and size of which are made according to the requirements of the bricks or wall panels. A certain pressure is applied to the granular raw material in the mold by a press. Under the action of pressure, the granular raw material is compacted, the internal air is expelled, and it is formed into a brick or wall panel shape with a certain density and strength. After the pressure holding period is over, the finished product, namely building bricks and wall panels, is removed from the mold.

[0034] Curing stage: Steam curing is used to gradually solidify and shape bricks or wall panels after they have been formed, and to bring them to a fixed strength. Steam curing includes the following process: Static curing: After the bricks or wall panels are formed, they are allowed to stand at room temperature for 2 hours to allow the surface of the bricks or wall panels to harden initially. Heating: Place the bricks or wall panels that have been left to stand still into the steam curing chamber and slowly heat them up at a rate of 15°C per hour for 2 hours. Constant temperature: Once the temperature reaches the set curing temperature, maintain a constant temperature of 60℃ for 5 hours to allow the cementitious materials to fully hydrate. Cooling: After the constant temperature period ends, the temperature is slowly reduced at a rate of 15°C per hour for 2 hours. When the surface temperature of the brick or wall panel is less than 20°C from the ambient temperature, it is removed from the curing room. Example 2

[0035] A method for recycling waste fan blade materials, used in the processing of building bricks and wall panels, includes the following steps: Pre-treatment stage: Cleaning the waste fan blades to remove impurities and coatings adhering to the surface; The pretreatment stage uses a combination of physical and chemical methods to clean the waste fan blades. The physical method includes rinsing with a high-pressure water gun to remove loose impurities from the surface using the impact force of the high-pressure water flow. The chemical method involves soaking the blades in a suitable solvent or cleaning agent based on the properties of the impurities and coatings to dissolve or remove them. After that, the blades are rinsed with water and dried.

[0036] Granulation stage: The cleaned waste fan blades are crushed into granules according to the filling requirements of building bricks and wall panels; The crushing of granular materials is carried out by a combination of jaw crusher and impact crusher. That is, the jaw crusher is used to coarsely crush the raw materials, and then the impact crusher is used to finely crush the coarsely crushed raw materials. At the same time, the output particle size, i.e. the degree of fine crushing, can be adjusted as needed.

[0037] Mixing phase: The resulting granular material is mixed with cement, aggregate and additives in a certain proportion; The mixed powder comprises the following components by weight: 25 parts fan blade particles, 20 parts cement, 39 parts aggregate, and 5 parts additives, including water-reducing agent, early-strength agent, retarder, and air-entraining agent.

[0038] Molding stage: Using a pressing molding process, the mixed granular raw materials are shaped into bricks or wall panels. The compression molding process is as follows: The mixed granular raw materials are placed into a pre-designed mold, the shape and size of which are made according to the requirements of the bricks or wall panels. A certain pressure is applied to the granular raw material in the mold by a press. Under the action of pressure, the granular raw material is compacted, the internal air is expelled, and it is formed into a brick or wall panel shape with a certain density and strength. After the pressure holding period is over, the finished product, namely building bricks and wall panels, is removed from the mold.

[0039] Curing stage: Steam curing is used to gradually solidify and shape bricks or wall panels after they have been formed, and to bring them to a fixed strength. Steam curing includes the following process: Static curing: After the bricks or wall panels are formed, they are allowed to stand at room temperature for 3 hours to allow the surface of the bricks or wall panels to harden initially. Heating: Place the bricks or wall panels that have been left to stand still into the steam curing chamber and slowly heat them up at a rate of 17°C per hour for 3 hours. Constant temperature: Once the temperature reaches the set curing temperature, maintain a constant temperature of 65°C for 5 hours to allow the cementitious materials to fully hydrate. Cooling: After the constant temperature period ends, the temperature is slowly reduced at a rate of 18°C ​​per hour for 3 hours. When the surface temperature of the brick or wall panel is less than 20°C from the ambient temperature, it is removed from the curing room. Example 3

[0040] A method for recycling waste fan blade materials, used in the processing of building bricks and wall panels, includes the following steps: Pre-treatment stage: Cleaning the waste fan blades to remove impurities and coatings adhering to the surface; The pretreatment stage uses a combination of physical and chemical methods to clean the waste fan blades. The physical method includes rinsing with a high-pressure water gun to remove loose impurities from the surface using the impact force of the high-pressure water flow. The chemical method involves soaking the blades in a suitable solvent or cleaning agent based on the properties of the impurities and coatings to dissolve or remove them. After that, the blades are rinsed with water and dried.

[0041] Granulation stage: The cleaned waste fan blades are crushed into granules according to the filling requirements of building bricks and wall panels; The crushing of granular materials is carried out by a combination of jaw crusher and impact crusher. That is, the jaw crusher is used to coarsely crush the raw materials, and then the impact crusher is used to finely crush the coarsely crushed raw materials. At the same time, the output particle size, i.e. the degree of fine crushing, can be adjusted as needed.

[0042] Mixing phase: The resulting granular material is mixed with cement, aggregate and additives in a certain proportion; The mixed powder comprises the following components by weight: 45 parts fan blade particles, 26 parts cement, 55 parts aggregate, and 7 parts additives, including water-reducing agent, early-strength agent, retarder, and air-entraining agent.

[0043] Molding stage: Using a pressing molding process, the mixed granular raw materials are shaped into bricks or wall panels. The compression molding process is as follows: The mixed granular raw materials are placed into a pre-designed mold, the shape and size of which are made according to the requirements of the bricks or wall panels. A certain pressure is applied to the granular raw material in the mold by a press. Under the action of pressure, the granular raw material is compacted, the internal air is expelled, and it is formed into a brick or wall panel shape with a certain density and strength. After the pressure holding period is over, the finished product, namely building bricks and wall panels, is removed from the mold.

[0044] Curing stage: Steam curing is used to gradually solidify and shape bricks or wall panels after they have been formed, and to bring them to a fixed strength. Steam curing includes the following process: Static curing: After the bricks or wall panels are formed, they are allowed to stand at room temperature for 5 hours to allow the surface of the bricks or wall panels to harden initially. Heating: Place the bricks or wall panels that have been left to stand still into the steam curing chamber and slowly heat them up at a rate of 19°C per hour for 4 hours. Constant temperature: Once the temperature reaches the set curing temperature, maintain a constant temperature of 71℃ for 5 hours to allow the cementitious materials to fully hydrate. Cooling: After the constant temperature period ends, the temperature is slowly reduced at a rate of 19°C per hour for 4 hours. When the surface temperature of the brick or wall panel is less than 20°C from the ambient temperature, it is removed from the curing room.

[0045] Table 1:

[0046] From Table 1, we can conclude that: The amount of fan blade particles varies between 22-45 parts; a moderate increase can improve the utilization rate of waste materials, reduce production costs, and increase strength. The amount of cement varies between 17-26 parts; a moderate increase can improve the strength and durability of the product, as cement is a cementing material and is crucial for the product's curing and strength development. The amount of aggregate varies between 35-55 parts; a moderate increase can enhance the product's structural stability, increase compressive strength, and may also improve the product's thermal and sound insulation properties. The amount of additives varies between 4-7 parts; a moderate increase can optimize the product's workability and hardened properties. For example, water-reducing agents can reduce water consumption and increase strength; early-strength agents can accelerate the hardening process; retarders can extend working time; and air-entraining agents can improve frost resistance. The static curing time should be adjusted between 2-5 hours. Increasing this time allows for more thorough initial hardening of the brick or wall panel surface, which is beneficial for strength development during subsequent steam curing. The heating rate should be adjusted between 15-19℃ / hour. Increasing this rate can shorten the curing time, but care must be taken to avoid excessively rapid heating that could cause stress cracks inside the product. The heating time should be adjusted between 2-4 hours. Increasing this time ensures uniform heating of the product, reduces temperature gradients, and is beneficial for strength development. The constant temperature should be adjusted between 15-19℃. Increasing this temperature can accelerate the hydration reaction of cementitious materials, improving product strength. The cooling rate should be adjusted between 15-19℃ / hour. Slowing down the cooling rate can reduce internal stress caused by temperature changes, lowering the risk of cracking. The cooling time should be adjusted between 2-4 hours. Increasing this time allows for slow cooling, reducing temperature gradients and helping to maintain strength. The temperature difference should be adjusted between 15-18℃. Controlling the temperature difference within a reasonable range can prevent cracks or performance degradation caused by sudden temperature changes.

[0047] Comparative Example 1 Compared with Example 1, the fan blade particles were increased to 60 parts, the proportions of other raw materials were similar to those in Example 1, and the preparation process was the same as in Example 1.

[0048] Comparative Example 2 Compared to Example 2, the cement content was reduced to 10 parts, while the proportions of other raw materials remained similar to those in Example 2, and the preparation process was the same as in Example 2.

[0049] Comparative Example 3 The raw material ratio of Example 3 is used, but steam curing is replaced with room temperature curing in the processing method. Other processing methods are the same as in Example 3.

[0050] Table 2:

[0051] Based on Table 2, the following conclusions can be drawn: The raw material ratio is higher than the critical value (Comparative Example 1). Cement and other cementitious materials need to be fully bonded with aggregates and granular materials to form a high-strength structure. If there are too many fan-shaped particles, the relative cement content will be reduced, and it will be unable to fully coat and bond all the particles, resulting in a decrease in overall strength. Too many fan-shaped particles may also increase the voids between particles, reducing the density of the material and thus affecting strength. In addition, increased voids between fan-shaped particles will increase the channels for the penetration of moisture and harmful substances, reducing the product's impermeability and accelerating the aging process. On the other hand, too many fan-shaped particles may affect the flowability of the mixture, making molding difficult and resulting in an uneven product surface. At the same time, uneven distribution of fan-shaped particles may lead to stress concentration inside the product, increasing the risk of cracking.

[0052] The raw material ratio is below the critical value (Comparative Example 2). Cement is the core of cementitious materials. Insufficient cement content will directly lead to a decrease in bonding ability, making it impossible to form sufficient strength to support the normal use of building bricks and wall panels. Secondly, low cement content will slow down the early strength development, prolong the production cycle, and reduce production efficiency. At the same time, without sufficient cement bonding, there will be a large number of pores and cracks inside the product, and moisture and harmful substances will easily penetrate, causing the product to age rapidly and thus reducing its durability.

[0053] The necessity of steam curing (Comparative Example 3) Steam curing accelerates the hydration reaction of cementitious materials by providing a high-temperature and high-humidity environment, enabling them to reach higher strength in a shorter time. Under normal temperature curing, the cement hydration rate is slower, and it may not reach sufficient strength within the expected time, affecting the load-bearing capacity and durability of building bricks and wall panels. Furthermore, strength gain under normal temperature curing is a long-term process, which may take a considerable amount of time to reach a strength level comparable to that of steam curing. This would prolong the production cycle and reduce production efficiency.

[0054] Steam curing helps form a dense microstructure, improving the product's impermeability. Under normal temperature curing, more pores and cracks may exist inside the product, leading to reduced impermeability and allowing moisture and harmful substances to easily penetrate, accelerating aging and damage. Additionally, under normal temperature curing, the surface hardening rate of bricks or wall panels may be uneven, resulting in defects such as unevenness, peeling, and cracks, affecting the product's appearance. Example 4

[0055] A method for facilitating the recycling and reuse of waste fan blade materials to enhance the strength of concrete includes the following steps: Pre-treatment stage: Cleaning the waste fan blades to remove impurities and coatings adhering to the surface; The cleaning of waste fan blades is carried out using a combination of physical and chemical methods. The physical method includes rinsing with a high-pressure water gun to remove loose impurities from the surface by using the impact force of the high-pressure water flow. The chemical method involves soaking the blades in a suitable solvent or cleaning agent according to the nature of the impurities and coatings to dissolve or remove them. After that, the blades are rinsed with water and dried.

[0056] Fiber crushing stage: The cleaned waste fan blades are shredded into fibers according to the reinforcement requirements of the concrete. Shear crushers are used to crush fibrous materials.

[0057] Composite stage: The obtained fibrous material is composited with a resin matrix to prepare fiber-reinforced ribs; The composite processing flow includes: Surface treatment: Silane coupling agents are used to modify the surface of fiber materials to improve their bonding performance; Resin matrix treatment: Select epoxy resin and add curing agent and accelerator according to the formula requirements, while stirring and mixing them. Impregnation treatment: The treated fiber material is immersed in the mixed resin matrix to fully impregnate the fiber with resin; Molding process: The resin-impregnated fiber material is pultruded or wound into the shape of fiber-reinforced ribs through pultrusion and winding processes; Curing treatment: Based on the characteristics of the resin, the resin is completely cured under set temperature and time conditions, so that the fiber and resin form a whole, i.e., fiber-reinforced rib.

[0058] Pre-embedding stage: The fiber-reinforced bars are embedded in the concrete according to the preset requirements; Pre-embedding requires determining the position and spacing of the fiber reinforcement bars. This involves setting up positioning devices inside the formwork for pouring concrete, accurately placing the fiber reinforcement bars on the positioning devices to ensure their accurate position in the concrete, and ensuring that the reinforcement bars are neatly arranged during placement.

[0059] Pouring stage: Pour concrete and cure it to make the fiber-reinforced bars and concrete form a whole.

[0060] Comparative Example 4: It is a high-strength concrete mix and its preparation method, which are disclosed in patent publication number CN113998952A, and the concrete prepared and poured by means of the embodiments therein.

[0061] Table 3:

[0062] From Table 3, we can conclude that: The tensile and compressive properties of the concrete product prepared in Example 4 were significantly improved.

[0063] In the description of this invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0064] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for facilitating the recycling and processing of waste fan blade materials, characterized in that, Includes the following steps: S1. Pre-treatment stage: Clean the waste fan blades to remove impurities and coatings adhering to the surface; S2, Granulation and Fiber Crushing Stage: S201. Crush the cleaned waste fan blades into granules according to the filling requirements of building bricks and wall panels. S202. According to the reinforcement requirements of concrete, the cleaned waste fan blades are crushed into fibrous form. S3, Mixing and Combining Stage: S301. Mix the obtained granular material with cement, aggregate and additives in a certain proportion; The powder after mixing in stage S301 includes the following components by weight: 20-50 parts of fan blade particles, 15-30 parts of cement, 30-60 parts of aggregate, and 2-10 parts of additives, including water-reducing agent, early strength agent, retarder and air-entraining agent. S302. The obtained fibrous material is composited with a resin matrix to prepare fiber-reinforced ribs. S4. Forming and Pre-embedding Stage: S401. Using a pressing molding process, the mixed granular raw materials are made into the shape of bricks or wall panels. S402. Embed the fiber-reinforced bars in the concrete according to the preset requirements; S5, Curing and Pouring Stage: S501. The bricks or wall panels are gradually solidified and molded through steam curing, and then they reach a fixed strength. S502. Pour concrete and cure it to make the fiber-reinforced bars and concrete form a whole.

2. The method for facilitating the recycling and processing of waste fan blade materials according to claim 1, characterized in that: The S1 pretreatment stage uses a combination of physical and chemical methods to clean the waste fan blades. The physical method includes rinsing with a high-pressure water gun to remove loose impurities from the surface using the impact force of the high-pressure water flow. The chemical method involves soaking the blades in a suitable solvent or cleaning agent based on the properties of the impurities and coatings to dissolve or remove them, followed by rinsing with water and drying.

3. The method for facilitating the recycling and processing of waste fan blade materials according to claim 1, characterized in that: The crushing of granular materials in stage S201 is carried out by a combination of jaw crusher and impact crusher, that is, the jaw crusher is used to coarsely crush the raw materials, and then the impact crusher is used to finely crush the coarsely crushed raw materials. The crushing of fibrous materials in stage S202 is carried out by shear crusher.

4. The method for facilitating the recycling and processing of waste fan blade materials according to claim 1, characterized in that: The composite processing flow of S302 includes: Surface treatment: Silane coupling agents are used to modify the surface of fiber materials to improve their bonding performance; Resin matrix treatment: Select epoxy resin and add curing agent and accelerator according to the formula requirements, while stirring and mixing them. Impregnation treatment: The treated fiber material is immersed in the mixed resin matrix to fully impregnate the fiber with resin; Molding process: The resin-impregnated fiber material is pultruded or wound into the shape of fiber-reinforced ribs through pultrusion and winding processes; Curing treatment: Based on the characteristics of the resin, the resin is completely cured under set temperature and time conditions, so that the fiber and resin form a whole, i.e., fiber-reinforced rib.

5. The method for facilitating the recycling and processing of waste fan blade materials according to claim 1, characterized in that: The compression molding process of S401 is as follows: The mixed granular raw materials are placed into a pre-designed mold, the shape and size of which are made according to the requirements of the bricks or wall panels. A certain pressure is applied to the granular raw material in the mold by a press. Under the action of pressure, the granular raw material is compacted, the internal air is expelled, and it is formed into a brick or wall panel shape with a certain density and strength. After the pressure holding period is over, demold the finished product and remove it from the mold.

6. The method for facilitating the recycling and processing of waste fan blade materials according to claim 1, characterized in that: The pre-embedding of S402 requires determining the position and spacing of the fiber reinforcement bars. That is, a positioning device is set inside the formwork for pouring concrete, and the fiber reinforcement bars are accurately placed on the positioning device to ensure that their position in the concrete is accurate. At the same time, the reinforcement bars are arranged neatly during the placement process.

7. The method for facilitating the recycling and processing of waste fan blade materials according to claim 1, characterized in that: The steam curing process in stage S501 includes the following steps: Static curing: After the bricks or wall panels are formed, they are allowed to stand at room temperature for 2-6 hours to allow the surface of the bricks or wall panels to harden initially. Heating: Place the bricks or wall panels that have been left to stand still into the steam curing chamber and slowly increase the temperature at a rate of 15℃-20℃ per hour for 2-4 hours. Constant temperature: Once the temperature reaches the set curing temperature, maintain a constant temperature of 60℃-80℃ for 4-8 hours to allow the cementitious materials to fully hydrate. Cooling: After the constant temperature period ends, slowly cool down at a rate of 15℃-20℃ per hour for 2-4 hours. When the surface temperature of the brick or wall panel is less than 20℃ different from the ambient temperature, remove it from the curing room.

8. The method for facilitating the recycling and processing of waste fan blade materials according to claim 1, characterized in that: The process of pouring concrete in S502 includes: Preparation: Check whether the pre-embedded position of the fiber-reinforced bars is accurate and ensure that it meets the design requirements; clean the debris and water inside the formwork, wet the formwork and reinforcing bars, and ensure that there is no water inside the formwork; Layered pouring: The concrete is poured in layers according to the falling height of the concrete and the performance of the vibrating equipment; Vibration: Use a vibrator to vibrate the concrete. The vibration time should be determined according to the slump of the concrete and the performance of the vibration equipment. The vibration time is 20-30 seconds, until the concrete surface shows a layer of slurry and no longer sinks significantly. During the vibration process, care should be taken to avoid colliding with the fiber reinforcement bars. Surface treatment: Before the concrete initially sets, the concrete surface is troweled to eliminate surface cracks and bleeding, making the surface smooth and dense. Concrete placement: The concrete temperature should be between 5℃ and 30℃ when placed in the formwork.

9. The method for facilitating the recycling and processing of waste fan blade materials according to claim 1, characterized in that: The curing temperature range of the S502 is 10℃-20℃, and the curing process includes: Covering and moisturizing: After the concrete is poured, cover and moisturize it in time. Covering materials include plastic film, straw mats and burlap sacks. Regular watering: On the basis of covering, water the concrete surface regularly, 2-6 times a day.

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