Recycled aggregate sorting device for geopolymer-stabilized pavement and its base construction technology

Abstract

The present invention discloses a geopolymer stabilized pavement recycled aggregate sorting device and a base construction process thereof, comprising a shell, a sorting space arranged inside the shell, a support rod fixedly connected to the inner wall of the sorting space, a plurality of sorting plates rotatably connected to the support rods, an adjusting cylinder arranged on the inner wall of the sorting space and used to control the change of the inclination angle of the plurality of sorting plates, and a positioning plate and a sliding plate respectively arranged at both ends of the plurality of sorting plates and slidably connected to the inner wall of the sorting space; during the aggregate processing process, the aggregate is sorted according to its particle size by utilizing the swing of the sorting plate, and then the aggregates of different particle sizes are laid in layers; during vibration, due to the regular discharge of the aggregates, aggregates with large particle sizes will not be close to each other, thereby reducing the contact between the aggregates, reducing collision and wear, and not generating new debris. While being able to remove the old mortar on the surface of the aggregates, the effective utilization rate of the aggregates is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of recycled aggregates, and in particular relates to a geopolymer stabilized pavement recycled aggregate sorting device and a base construction process thereof. Background Art

[0002] Because recycled aggregate, produced by crushing cement concrete panels on-site, has high water absorption and low strength, using it directly to prepare the base mix results in significant fluctuations in the mix's workability and road performance, making quality control difficult. This is primarily due to impurities like old mortar or asphalt adhering to the surface of the recycled aggregate. These adhering agents significantly reduce the bond between the cement and the aggregate. Removing these impurities through vibration or stirring before use can alter the aggregate's particle size. During vibration, due to the uneven size of the aggregate, small particles can become trapped between larger particles. These particles collide and rub against each other, resulting in significant debris and reduced aggregate recycling efficiency.

[0003] Therefore, it is considered to sort the aggregate and then vibrate to remove the old mortar on the surface of the aggregate. In the existing technology, there are two main ways to sort aggregate. One is to screen out aggregates with uniform particle size according to the required particle size. Since it is difficult to control the fragmentation of aggregates during crushing, most of the aggregates are removed, and the utilization rate of aggregates is very low. During the construction process, the particle size of recycled aggregates that can meet the use requirements has a wide range. Usually, aggregates of different particle sizes are mixed in proportion before use. Therefore, another grading screening method is often used. Using multiple screens, through vibration or rolling, the aggregates are classified by particle size, the mortar is removed, and then mixed in proportion. This method will also cause excessive collision and friction between aggregates of different particle sizes during the sorting and mixing process, resulting in the generation of a large amount of debris, reducing the recycling rate of aggregates. Summary of the Invention

[0004] In order to solve the above problems existing in the prior art, the present invention aims to provide a geopolymer stabilized pavement recycled aggregate sorting device and a base construction process thereof.

[0005] The technical solution adopted in the present invention is:

[0006] A geopolymer-stabilized pavement recycled aggregate sorting device comprises a housing, a sorting space disposed within the housing, a support rod fixedly connected to the inner wall of the sorting space, a plurality of sorting plates rotatably connected to the support rod, an adjustment cylinder disposed on the inner wall of the sorting space and used to control the change in the inclination angle of the plurality of sorting plates, and an alignment plate and a sliding plate disposed at both ends of the plurality of sorting plates and slidably connected to the inner wall of the sorting space.

[0007] The cylinder barrel of the adjusting cylinder is fixedly connected to the inner wall of the sorting space, and a sliding rod is fixedly provided on the piston rod of the adjusting cylinder. The sliding rod is slidably connected to the inner wall of the sorting space, and a plurality of limit pins are fixedly provided on the sliding rod. The plurality of limit pins correspond one-to-one to the plurality of sorting plates, and the plurality of sorting plates are parallel to each other.

[0008] As a preferred embodiment of the present invention, a telescopic sleeve 1 is provided on the side of the alignment plate away from the sorting plate, a spring is provided in the telescopic sleeve 1, and the two ends of the telescopic sleeve 1 are respectively used to connect the alignment plate and the inner wall of the sorting space; a telescopic sleeve 2 is provided on the side of the sliding plate away from the sorting plate, a spring is provided in the telescopic sleeve 2, and the two ends of the telescopic sleeve 2 are respectively used to connect the sliding plate and the inner wall of the sorting space.

[0009] As a preferred embodiment of the present invention, the sliding plate is a hollow structure, a baffle is slidingly provided on one side of the sliding plate, a control cylinder is provided on one side of the baffle, the cylinder barrel of the control cylinder is fixedly connected to the sliding plate, the piston rod of the control cylinder is fixedly connected to the baffle, a control box is fixedly provided on one side of the shell, and the baffle is located in the control box.

[0010] As a preferred embodiment of the present invention, a connecting sleeve is fixedly provided at the hollow position of the sliding plate, and the connecting sleeve is located at the end of the sliding plate away from the sorting plate. A fixing sleeve is slidably provided at the end of the connecting sleeve away from the sorting plate, and the end of the fixing sleeve away from the sorting plate is fixedly connected to the inner wall of the sorting space, and the fixing sleeve passes through the shell, and a discharge port fixedly connected to the outer wall of the shell is provided at the position where the fixing sleeve passes through the shell, and the opening of the discharge port faces downward.

[0011] As a preferred embodiment of the present invention, a control bucket is provided on one side of the discharge port, a screening plate is fixedly provided on one side of the control bucket, and the screening plate is in an inclined state; a collecting trough is provided on the side of the control bucket close to the screening plate, and the control bucket and the collecting trough are detachably connected by a pin.

[0012] As a preferred embodiment of the present invention, a fixing frame is provided on the side of the collecting trough away from the control bucket, and vibration springs are respectively provided at both ends of the fixing frame, and the vibration springs are used to connect the outer wall of the shell and the fixing frame. A vibration motor is fixedly provided at one end of the fixing frame away from the collecting trough, an eccentric block is fixed on the output shaft of the vibration motor, a fixing frame is fixedly provided on one side of the fixing frame, and the collecting trough is fixedly connected to the fixing frame.

[0013] As a preferred embodiment of the present invention, a double-shaft motor is fixedly provided on one side of the shell, and a screw is fixedly provided on the output shaft at both ends of the double-shaft motor respectively, each of the screws is threadedly connected to a threaded sleeve, and a shielding plate is fixedly provided on one side of each threaded sleeve, and the two shielding plates are respectively slidably connected to the shell.

[0014] As a preferred embodiment of the present invention, the sorting effects of the multiple sorting plates are different, the top sorting plate sorts out the aggregate with the largest particles, and the bottom sorting plate sorts out the aggregate with the smallest particles in descending order, and a collecting plate is provided on the side of the sorting plate away from the shielding plate, and the collecting plate is used to collect debris and dust in the aggregate.

[0015] The construction process of recycled aggregate base of geopolymer stabilized pavement includes the following steps:

[0016] S1. Preparation before construction, including material preparation, equipment preparation and site preparation; the material preparation includes collecting aggregates and preparing geopolymer gel materials;

[0017] S2, aggregate processing; the collected aggregate is crushed, and the aggregate is grouped and processed in batches using the geopolymer stabilized pavement recycled aggregate sorting device. Each group of materials is first sorted according to its particle size, then layered and mixed according to its particle size, and finally vibrated to remove impurities;

[0018] S3. Geopolymer preparation: Add the silica-alumina raw material and alkaline activator into the mixing equipment, dry mix them evenly, and then add clean water for wet mixing;

[0019] S4, mixing the mixture; adding the processed aggregate into the mixing equipment, and then adding the prepared geopolymer gelling material and stirring thoroughly;

[0020] S5. Spreading and compacting: The mixed geopolymer-stabilized pavement recycled aggregate mixture is transported to the construction site and spread using a paver. After paving, it is immediately compacted using a roller. A light roller is used for initial compaction, followed by a heavy roller for secondary compaction, and finally a light roller for final compaction.

[0021] S6. Maintenance and quality inspection: After compaction is completed, the base layer is maintained by covering it with plastic film. After the maintenance period, the compaction, flatness, deflection value and unconfined compressive strength of the base layer are tested.

[0022] As a preferred embodiment of the present invention, in step S2, the aggregates after impurity removal are washed and dried in batches according to the original groups, and then stacked according to the original groups; in step S4, the aggregates are added to the mixing equipment in batches according to the groups in step S2.

[0023] The beneficial effects of the present invention are as follows: as a geopolymer stabilized pavement recycled aggregate sorting device and its base construction process, during the aggregate processing process, the swing of the sorting plate is used to sort the aggregate according to its particle size, and then the aggregates of different particle sizes are laid in layers, with the aggregates with the smallest particle size located on the lower side and the aggregates with larger particle sizes located on the upper side. During the sorting process, the aggregates enter the sorting device in batches, and the swing of the sorting plate is used to make the aggregates roll along the sorting plate, thereby reducing the friction between the aggregates. The sorting plate is relatively smooth, thereby reducing the fragmentation of the aggregates during the sorting process. Moreover, after the aggregate sorting is completed, the present invention first mixes the aggregates and then removes the old mortar remaining on the surface of the aggregates by vibration. During the vibration, due to the regular discharge of the aggregates, aggregates with large particle size differences will not be close to each other, thereby reducing the contact between the aggregates, reducing collisions and wear, and not generating new debris. While being able to remove the old mortar on the surface of the aggregates, the effective utilization rate of the aggregates is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0025] Figure 1 It is a structural schematic diagram of the present invention;

[0026] Figure 2 This invention Figure 1 Schematic diagram of the cross-sectional structure;

[0027] Figure 3 This invention Figure 1 Schematic diagram of the structure after the shell is hidden;

[0028] Figure 4 This invention Figure 3 Schematic diagram of the structure after the sorting plate is hidden;

[0029] Figure 5 This invention Figure 4 Schematic diagram of the sliding plate structure;

[0030] Figure 6 This invention Figure 4 Schematic diagram of the collection tank structure. DETAILED DESCRIPTION

[0031] In order to make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present invention and are not intended to limit the present invention. That is, the embodiments described herein are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and illustrated in the drawings herein may be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely intended to represent selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0033] The following combination Figure 1-6 The specific embodiment of the present invention is described. The geopolymer stabilized pavement recycled aggregate sorting device includes a shell 11, a sorting space arranged inside the shell 11, a support rod 25 fixedly connected to the inner wall of the sorting space, a plurality of sorting plates 32 respectively rotatably connected to the support rod 25, an adjusting cylinder 24 arranged on the inner wall of the sorting space and used to control the change of the inclination angle of the plurality of sorting plates 32, and a positioning plate 23 and a sliding plate 28 respectively arranged at both ends of the plurality of sorting plates 32 and slidably connected to the inner wall of the sorting space; the swing of the sorting plate 32 is used to sort the aggregate according to its particle size, and the aggregate with a particle size that meets the recycling requirements is screened out, and the aggregates of different particle sizes are laid in layers, with the aggregate with the smallest particle size located on the lower side and the aggregate with a larger particle size located on the upper side. During vibration, due to the regular discharge of aggregates, aggregates with large particle size differences will not be close to each other, thereby reducing the contact between aggregates and reducing collision and wear.

[0034] When the aggregate is finally used, it is necessary to mix aggregates of different particle sizes together. Originally, the aggregate after the old mortar is removed by vibration is relatively brittle. Considering that the aggregates of different particle sizes are mixed by stirring, a large amount of aggregate will be broken. Therefore, the present invention processes the aggregates in batches, and each group of aggregates is sorted and laid in layers. Finally, the old mortar is removed by vibration. Each group of clean aggregates obtained has different particle sizes and can be used directly.

[0035] The barrel of the adjustment cylinder 24 is fixedly connected to the inner wall of the sorting space. A sliding rod 37 is fixedly attached to the piston rod of the adjustment cylinder 24. The sliding rod 37 is slidably connected to the inner wall of the sorting space. A plurality of stop pins 36 are fixedly attached to the sliding rod 37. The stop pins 36 correspond one-to-one with the plurality of sorting plates 32, and the plurality of sorting plates 32 are parallel to each other. There are two adjustment cylinders 24, one on either side of the sorting space, controlling the downward movement of the left and right sorting plates 32.

[0036] Advantageously, a telescopic sleeve 22 is provided on the side of the alignment plate 23 away from the sorting plate 32. A spring is installed in the telescopic sleeve 22, and its two ends are used to connect the alignment plate 23 to the inner wall of the sorting space. A telescopic sleeve 27 is provided on the side of the sliding plate 28 away from the sorting plate 32. A spring is installed in the telescopic sleeve 27, and its two ends are used to connect the sliding plate 28 to the inner wall of the sorting space. During the process of changing the angle of the sorting plate 32, the sliding plate 28 and the alignment plate 23 on both sides always remain in contact with the sorting plate 32, preventing aggregate from falling from either end of the sorting plate 32.

[0037] Advantageously, the sliding plate 28 has a hollow structure, and a baffle 26 is slidably mounted on one side of the sliding plate 28. A control cylinder 33 is mounted on one side of the baffle 26. The cylinder barrel of the control cylinder 33 is fixedly connected to the sliding plate 28, and the piston rod of the control cylinder 33 is fixedly connected to the baffle 26. A control box 16 is fixedly mounted on one side of the housing 11, and the baffle 26 is located within the control box 16. When the sorting plate 32 tilts to one side, the baffle 26 on the sliding plate 28 opens, allowing the aggregate to slide down under the action of its gravity.

[0038] Advantageously, a connecting sleeve 34 is fixedly disposed in the hollowed-out portion of the sliding plate 28. The connecting sleeve 34 is located at the end of the sliding plate 28 away from the sorting plate 32. A fixing sleeve 35 is slidably disposed on the end of the connecting sleeve 34 away from the sorting plate 32. The end of the fixing sleeve 35 away from the sorting plate 32 is fixedly connected to the inner wall of the sorting space. The fixing sleeve 35 extends through the housing 11. A discharge port 17 is fixedly connected to the outer wall of the housing 11 at the location where the fixing sleeve 35 extends through the housing 11, with the opening of the discharge port 17 facing downward. As the sorting plate 32 oscillates, the connecting sleeve 34 moves with the sliding plate 28, causing the connecting sleeve 34 and fixing sleeve 35 to slide. The aggregate experiences a certain degree of acceleration during its downward movement, allowing the aggregate to pass through the connecting sleeve 34 and fixing sleeve 35.

[0039] Advantageously, a control bucket 18 is provided on one side of the discharge port 17, and a screening plate 38 is fixedly provided on one side of the control bucket 18, and the screening plate 38 is in an inclined state; a collecting trough 19 is provided on the side of the control bucket 18 close to the screening plate 38, and the control bucket 18 and the collecting trough 19 are detachably connected by a pin.

[0040] Advantageously, a fixing bracket 31 is provided on the side of the collection trough 19 away from the control bucket 18. Vibration springs 29 are provided at each end of the fixing bracket 31. The vibration springs 29 are used to connect the outer wall of the housing 11 to the fixing bracket 31. A vibration motor 30 is fixedly provided on the end of the fixing bracket 31 away from the collection trough 19. An eccentric weight is fixedly provided on the output shaft of the vibration motor 30. A fixing frame 20 is fixedly provided on one side of the fixing bracket 31. The collection trough 19 is fixedly connected to the fixing frame 20. The vibration motor 30 drives the fan-shaped eccentric weight on its output shaft to rotate. Under the action of the fan-shaped eccentric weight, the vibration motor 30 is forced to vibrate, and the vibration amplitude is amplified by the vibration springs 29.

[0041] Advantageously, a dual-shaft motor 13 is fixed to one side of the housing 11. A screw 14 is fixed to each output shaft at both ends of the dual-shaft motor 13. A threaded sleeve 12 is threadedly connected to each screw 14. A shielding plate 15 is fixed to one side of each threaded sleeve 12. The two shielding plates 15 are slidably connected to the housing 11. The dual-shaft motor 13 has an output shaft at each end, and the screws 14 on both sides have opposite threads, thereby driving the two shielding plates 15 to open and close simultaneously.

[0042] Advantageously, the multiple sorting plates 32 have different sorting effects. The topmost sorting plate 32 sorts the largest aggregate particles, and the bottommost sorting plate 32 sorts the smallest aggregate particles in decreasing order. A collection tray 21 is provided on the side of the sorting plate 32 away from the shielding plate 15. This tray is used to collect aggregate debris and dust. During the oscillation of the sorting plates 32, there is essentially no slippage between the aggregate particles, thus preventing the generation of new debris or dust. The debris and dust that falls into the collection tray 21 is solely from the crushing of the aggregate. Due to their small particle size, these debris particles are unsuitable for use as recycled aggregate.

[0043] The construction process of recycled aggregate base of geopolymer stabilized pavement includes the following steps:

[0044] S1. Preparation before construction, including material preparation, equipment preparation and site preparation; the material preparation includes collecting aggregates and preparing geopolymer gel materials;

[0045] S2, aggregate processing; the collected aggregate is crushed, and the aggregate is grouped and processed in batches using the geopolymer stabilized pavement recycled aggregate sorting device. Each group of materials is first sorted according to its particle size, then layered and mixed according to its particle size, and finally vibrated to remove impurities;

[0046] S3. Geopolymer preparation: Add the silica-alumina raw material and alkaline activator into the mixing equipment, dry mix them evenly, and then add clean water for wet mixing;

[0047] S4, mixing the mixture; adding the processed aggregate into the mixing equipment, and then adding the prepared geopolymer gelling material and stirring thoroughly;

[0048] S5. Spreading and compacting: The mixed geopolymer-stabilized pavement recycled aggregate mixture is transported to the construction site and spread using a paver. After paving, it is immediately compacted using a roller. A light roller is used for initial compaction, followed by a heavy roller for secondary compaction, and finally a light roller for final compaction.

[0049] S6. Maintenance and quality inspection: After compaction is completed, the base layer is maintained by covering it with plastic film. After the maintenance period, the compaction, flatness, deflection value and unconfined compressive strength of the base layer are tested.

[0050] Advantageously, in step S2, the aggregates after impurity removal are washed and dried in batches according to the original groups, and then stacked according to the original groups; in step S4, the aggregates are added to the mixing equipment in batches according to the groups in step S2.

[0051] The working principle of the device for sorting recycled aggregate from geopolymer-stabilized pavement of the present invention is as follows:

[0052] In the initial state, the baffle 26 and the hollowed-out portion of the sliding plate 28 overlap, blocking the connecting sleeve 34 .

[0053] The double-output shaft motor 13 is controlled to start, and the double-output shaft motor 13 is controlled to rotate on both sides, driving the threaded sleeves 12 and the shielding plate 15 on both sides to move, and the feeding position on the upper side of the shell 11 is opened.

[0054] Put the grouped aggregates into the sorting space, and the aggregates will fall on the uppermost sorting plate 32. The control adjusting cylinder 24 is started, and the piston rod of the adjusting cylinder 24 drives the sliding rod 37 to move. The limit pin 36 moves along with the sliding rod 37, and the limit pin 36 drives all the ends of the alignment plates 23 to move up and down. During this process, the limit pin 36 and the surface of the sorting plate 32 slide, the alignment plate 23 and the sliding plate 28 slide with the inner wall of the sorting space, the telescopic sleeve 1 22 and the telescopic sleeve 2 27 extend and retract, and the connecting sleeve 34 and the fixed sleeve 35 slide.

[0055] With the cooperation of the two adjusting cylinders 24, the two ends of the sorting plate 32 swing up and down. During this process, the aggregate with the smallest particle size will fall down through the upper sorting plate 32. After a certain period of time, the aggregate will be layered according to its particle size from large to small. The powdered aggregate with no regeneration meaning and some impurities fall into the collection tray 21 and are collected. After a certain amount is collected, it will be processed.

[0056] The control adjustment cylinder 24 is started to tilt the plurality of sorting plates 32 toward one end and maintain the same Figure 2 In the state shown, the control cylinder 33 is started, and the piston rod of the control cylinder 33 is extended to drive the baffle 26 to move. During the withdrawal of the baffle 26, the connecting sleeve 34 at the lower side is no longer blocked. Under the action of the gravity of the aggregate itself, the aggregate with the smallest particle size slides along the surface of the inclined sorting plate 32, passes through the discharge port 17 and falls into the control bucket 18. As the baffle 26 is gradually withdrawn, the aggregate with larger particle size and the aggregate with the largest particle size pass through the connecting sleeve 34, the fixing sleeve 35 and the discharge port 17 in turn and fall into the control bucket 18.

[0057] Finally, the vibration motor 30 is started, and the fixed frame 31, the fixed frame 20, the collecting trough 19 and the control bucket 18 are forced to vibrate together. The old mortar and other impurities on the surface of the aggregate are separated from the aggregate and enter the collecting trough 19 through the screening plate 38. In this process, the small aggregates are on the lower side and the large aggregates are on the upper side. The density of the lower side is higher. During the vibration process, the relative displacement between aggregates of different particle sizes is reduced, the wear and collision between aggregates are reduced, and no new debris is generated.

[0058] After a certain period of time, the equipment stops working, the control bucket 18 is disassembled, the aggregate inside it is poured out, and it is separated from other aggregates. Subsequently, it is soaked in clean water and naturally dried according to the original grouping. During the cleaning and drying process, the aggregate is not stirred significantly to avoid the generation of new aggregate debris and improve the utilization rate of the aggregate.

[0059] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0060] The above content is merely an example and explanation of the structure of the present invention. Those skilled in the art may make various modifications or additions to the described specific embodiments or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims of the present invention, they should all fall within the scope of protection of the present invention.

Claims

1. Geopolymer stabilized pavement recycled aggregate sorting device, characterized by: The invention comprises a shell, a sorting space provided inside the shell, a support rod fixedly connected to the inner wall of the sorting space, a plurality of sorting plates rotatably connected to the support rod, an adjustment cylinder provided on the inner wall of the sorting space and used to control the change of the inclination angle of the plurality of sorting plates, and an alignment plate and a sliding plate respectively provided at both ends of the plurality of sorting plates and slidably connected to the inner wall of the sorting space; The cylinder barrel of the adjusting cylinder is fixedly connected to the inner wall of the sorting space, the piston rod of the adjusting cylinder is fixedly provided with a sliding rod, the sliding rod is slidably connected to the inner wall of the sorting space, and a plurality of limit pins are fixedly provided on the sliding rod, the plurality of limit pins correspond to the plurality of sorting plates one by one, and the plurality of sorting plates are parallel to each other; The cam is fixed with a toothed plate at one end thereof, and the toothed plate is fixed with a toothed plate at one end thereof, wherein the toothed plate is located at a position where the toothed plate is moved along the toothed plate, and the toothed plate is moved along the toothed plate, wherein the toothed plate is fixed with a toothed plate at one end thereof.

2. The geopolymer stabilized pavement recycled aggregate sorting device according to claim 1, characterized in that: A telescopic sleeve 1 is provided on the side of the alignment plate away from the sorting plate, a spring is provided in the telescopic sleeve 1, and the two ends of the telescopic sleeve 1 are respectively used to connect the alignment plate and the inner wall of the sorting space; a telescopic sleeve 2 is provided on the side of the sliding plate away from the sorting plate, a spring is provided in the telescopic sleeve 2, and the two ends of the telescopic sleeve 2 are respectively used to connect the sliding plate and the inner wall of the sorting space.

3. The geopolymer-stabilized pavement recycled aggregate sorting device according to claim 2, characterized in that: A baffle is slidably provided on one side of the sliding plate, a control cylinder is provided on one side of the baffle, the cylinder barrel of the control cylinder is fixedly connected to the sliding plate, the piston rod of the control cylinder is fixedly connected to the baffle, a control box is fixedly provided on one side of the shell, and the baffle is located in the control box.

4. The geopolymer-stabilized pavement recycled aggregate sorting device according to claim 3, characterized in that: One end of the fixing sleeve away from the sorting plate is fixedly connected to the inner wall of the sorting space.

5. The geopolymer-stabilized pavement recycled aggregate sorting device according to claim 4, characterized in that: The control bucket is detachably connected to the collecting trough via a latch.

6. The geopolymer-stabilized pavement recycled aggregate sorting device according to claim 5, characterized in that: An eccentric block is fixedly provided on the output shaft of the vibration motor, a fixing frame is fixedly provided on one side of the fixing frame, and the collecting trough is fixedly connected to the fixing frame.

7. The geopolymer-stabilized pavement recycled aggregate sorting device according to claim 1, characterized in that: A double-output shaft motor is fixedly provided on one side of the shell, and a screw rod is fixedly provided on the output shaft at both ends of the double-output shaft motor respectively. A threaded sleeve is threadedly connected to each screw rod, and a shielding plate is fixedly provided on one side of each threaded sleeve. The two shielding plates are respectively slidably connected to the shell.

8. The geopolymer-stabilized pavement recycled aggregate sorting device according to claim 7, characterized in that: The sorting effects of the multiple sorting plates are different. The top sorting plate sorts out the aggregate with the largest particles, and the bottom sorting plate sorts out the aggregate with the smallest particles in descending order. A collecting plate is provided on the side of the sorting plate away from the shielding plate, and the collecting plate is used to collect debris and dust in the aggregate.

9. A construction process for a geopolymer-stabilized pavement recycled aggregate base, using the geopolymer-stabilized pavement recycled aggregate sorting device according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1. Preparation before construction, including material preparation, equipment preparation and site preparation; the material preparation includes collecting aggregates and preparing geopolymer gel materials; S2, aggregate processing; The collected aggregates are crushed, and the aggregates are grouped and processed in batches using the geopolymer stabilized pavement recycled aggregate sorting device. Each group of materials is first sorted according to its particle size, then mixed in layers according to its particle size, and finally vibrated to remove impurities; S3. Geopolymer preparation: Add the silica-alumina raw material and alkaline activator into the mixing equipment, dry mix them evenly, and then add clean water for wet mixing; S4, mixing the mixture; adding the processed aggregate into the mixing equipment, and then adding the prepared geopolymer gelling material and stirring thoroughly; S5. Spreading and compacting: The mixed geopolymer-stabilized pavement recycled aggregate mixture is transported to the construction site and spread using a paver. After paving, it is immediately compacted using a roller. A light roller is used for initial compaction, followed by a heavy roller for secondary compaction, and finally a light roller for final compaction. S6. Maintenance and quality inspection: After compaction is completed, the base layer is maintained by covering it with plastic film. After the maintenance period, the compaction, flatness, deflection value and unconfined compressive strength of the base layer are tested.

10. The construction process of geopolymer-stabilized pavement recycled aggregate base according to claim 9, characterized in that: In step S2, the aggregates after impurity removal are washed and dried in batches according to the original groups, and then stacked according to the original groups; In step S4, the aggregates are added to the mixing equipment in batches according to the grouping in step S2.

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