Recycled coarse aggregate strengthening process and device for concrete processing

Abstract

The invention relates to the technical field of building solid waste resource utilization, in particular to a recycled coarse aggregate strengthening process for concrete processing and a device thereof.The process comprises the following steps that S1, raw material pretreatment is conducted, specifically, waste concrete is crushed and screened to obtain recycled coarse aggregate with the particle size being 5-26 mm, and the recycled coarse aggregate is subjected to washing impurity removal and low-temperature drying to constant weight; s2, composite modification treatment: preparing a composite modification liquid, immersing the pretreated recycled coarse aggregate into the composite modification liquid, performing centrifugal stirring to assist permeation, and after soaking is completed, screening out redundant modification liquid on the surface; s3, carbonization curing treatment: placing the recycled coarse aggregate with the modified liquid attached to the surface in a closed environment, introducing CO2 gas, and carrying out carbonization reaction, chemical slurry is adopted for wrapping, CO2 is added for carbonization curing, the silicate-based modified liquid can effectively block surface pores and microcracks, the subsequent carbonization reaction can react with a hydration product such as Ca (OH) 2 in the slurry to generate calcium carbonate, and the surface of the recycled coarse aggregate is coated with the modified liquid. And further compacting the reinforced layer.

Description

Technical Field

[0001] This invention relates to the field of construction solid waste resource utilization technology, specifically a process and apparatus for reinforcing concrete with recycled coarse aggregate. Background Technology

[0002] Infrastructure construction generates a large amount of waste concrete and other construction waste. Traditional landfill disposal methods not only occupy land resources but also cause environmental pollution. Crushing and screening waste concrete to prepare recycled coarse aggregate for resource recycling is an effective way to solve the above problems. However, the surface of recycled coarse aggregate is usually covered with a large amount of loose and porous aged mortar, and there are many micro-cracks inside, which seriously limits its application in high-performance concrete. Existing single chemical strengthening methods, such as acid soaking, can remove some of the attached mortar, but they introduce harmful ions, causing secondary pollution, and the washing process consumes a lot of water. Existing composite strengthening processes often have problems such as complex steps, high energy consumption, and unstable strengthening effects. The pretreatment of waste concrete and other construction waste is poor, resulting in large particles that are not conducive to recycling. Therefore, there is a need for a simple, environmentally friendly, efficient, and significantly strengthening process for recycled coarse aggregate, so that waste concrete and other construction waste can be fully and rationally treated and reused. Summary of the Invention

[0003] To address the problems in the prior art, the present invention provides a process and apparatus for strengthening concrete using recycled coarse aggregate.

[0004] The technical solution adopted by this invention to solve its technical problem is: a process for strengthening concrete using recycled coarse aggregate, comprising the following steps: S1. Raw material pretreatment: Waste concrete is crushed and screened to obtain recycled coarse aggregate with a particle size of 5-26mm, which is then washed with water to remove impurities and dried at low temperature to constant weight. S2. Composite modification treatment: Prepare composite modification liquid, immerse the pretreated recycled coarse aggregate in the composite modification liquid, use centrifugal stirring to assist in penetration, and after soaking, remove excess modification liquid from the surface by sieving. S3. Carbonization and curing treatment: The recycled coarse aggregate with the modified liquid on its surface is placed in a closed environment and CO2 gas is introduced to carry out the carbonization reaction. S4. Curing and molding: The carbonized recycled coarse aggregate is cured at a constant temperature. S5. Quality Inspection: Measure the water absorption rate, crushing value and Los Angeles abrasion value of the cured recycled coarse aggregate. If the value is qualified, it is considered reinforced recycled coarse aggregate.

[0005] Specifically, in S1, the washing time is 15-30 minutes, the low-temperature drying temperature is 60-80℃, and the needle-like and flaky content of the recycled coarse aggregate is controlled below 10%. In S2, the composite modified liquid is composed of 40-60 parts cement, 10-15 parts silica fume, 20-30 parts fly ash, 0.8-1.2 parts silane coupling agent, and 25-40 parts deionized water by weight, with a water-binder ratio of 0.25-0.35. The stirring speed of the composite modified liquid is 800-1200 r / min, and the stirring time is 15-20 minutes.

[0006] Specifically, in S2, the centrifugal stirring speed is 300-500 r / min, the stirring time is 30-60 s / time, stirring once every 15 min, the soaking time is 2-4 h, and the mass of the modified liquid adhering to the aggregate surface is 5%-8% of the dry mass of the aggregate. In S3, the CO2 gas purity is 90%-100%, the reaction pressure is 0.3-0.5 MPa, the reaction temperature is 25-35℃, and the carbonization and curing time is 1-2 h. In S4, the constant temperature curing temperature is 50-60℃, the relative humidity is 60%-70%, and the curing time is 6-8 h.

[0007] A device for reinforcing recycled coarse aggregate in concrete processing includes a flow guiding and discharge main body, a washing and treatment main body, a first support leg, a second support leg, a first track support plate, a first electric push rod, a pretreatment main body, a first fixed support frame, a second fixed support frame, and a screening main body. The screening main body is located below the pretreatment main body. The second fixed support frame is fixedly connected to both sides of the screening main body. The first fixed support frame is located on both sides of the pretreatment main body, and the bottom end of the first fixed support frame is fixedly connected to the upper end of the second fixed support frame. The flow guiding and discharge main body is located on the outside of the screening main body. The first track support plates are symmetrically distributed. The second support legs are uniformly fixedly installed at the bottom of the first track support plates. The first electric push rod is fixedly installed on the upper part of the outer end of the first track support plate. The washing and treatment main body is located on the first track support plate, and the first support leg is fixedly connected to the bottom end of the second fixed support frame.

[0008] Specifically, the pretreatment body includes a feed hopper, a hydraulic cylinder, a crushing box, fixing bolts, a limit frame, threaded holes, an adjusting arm, a third electric push rod, a telescopic limit ring, a movable adjusting frame, a support frame, a first motor, a conveying connecting pipe, a swing adjusting plate, spray holes, a crushing plate, a crushing cone, a first auxiliary crushing wheel, a second auxiliary crushing wheel, and a second motor. The feed hopper is fixedly connected to the upper end of the crushing box by bolts, and the support frame is fixedly installed on the side end of the feed hopper by bolts. The bottom end of the swing adjusting plate is rotatably mounted on the support frame. At the upper end, the first motor is fixedly installed on the upper side of the support frame, and the drive end of the first motor is fixedly connected to the bottom side of the swing adjustment plate. The conveying connecting pipe is evenly fixedly installed on the side of the swing adjustment plate, and the spraying holes are evenly fixedly installed on the bottom of the swing adjustment plate. The conveying connecting pipe communicates with the inside of the spraying holes through the swing adjustment plate. The telescopic limiting ring is slidably engaged inside the bottom of the crushing box. The third electric push rod is symmetrically fixedly installed on the bottom side of the crushing box, and the bottom end of the third electric push rod is connected to the bottom side of the support frame. The bottom side of the telescopic limiting ring is fixedly connected. The hydraulic cylinder is uniformly inclined and fixedly installed on both sides of the upper end of the crushing box. The extrusion crushing plate is rotatably installed inside the upper end of the crushing box. The crushing cone is uniformly fixedly installed on the outer side of the extrusion crushing plate, and the front end of the hydraulic cylinder is rotatably connected to the bottom inner side of the extrusion crushing plate. The movable adjustment frame is slidably engaged on the crushing box. The adjusting arm is uniformly fixedly installed on both sides of the movable adjustment frame. The limiting frame is fixedly installed on both sides of the crushing box. The adjusting arm is slidably inserted into the limiting frame. The threaded hole is uniformly opened through the adjusting arm. The fixing bolt is threaded into the limiting frame and the adjusting arm. The first auxiliary crushing wheel is rotatably installed inside the movable adjustment frame. The second auxiliary crushing wheel is rotatably installed inside the crushing box. The second motor is fixedly installed on the side of the movable adjustment frame and the crushing box, and the drive ends of the two second motors are respectively fixedly connected to the middle of the side ends of the first auxiliary crushing wheel and the second auxiliary crushing wheel. The first auxiliary crushing wheel and the second auxiliary crushing wheel are located below the extrusion crushing plate.

[0009] Specifically, the screening body includes a first screening section, a second screening section, and a third screening section. The second screening section is located between the first and third screening sections. The first, second, and third screening sections have identical structures. The first screening section includes a third motor, a screening frame, a first rotating adjusting gear ring, a first drive gear, a first limiting retaining ring, a fourth motor, a rotating support arm, a support base, a second track support plate, and a fourth electric push rod. The second track support plate is symmetrically distributed. The support base is slidably engaged with the second track support plate. The fourth electric push rod is fixedly installed on the second track support plate, and its front end is fixedly connected to the bottom of the second track support plate. The bottom end of the rotating support arm is rotatably installed inside the support base. The rotating support arm is distributed on the first limiting retaining ring. The bottom edges of the screening screen frame are rotatably engaged with the first limiting ring on both sides of the bottom of the locating ring. The first rotating adjusting gear ring is fixedly installed on the outer bottom of the screening screen frame. The fourth motor is fixedly installed on the upper side of one side of the first limiting ring. The first limiting ring is distributed on the upper sides of the first rotating adjusting gear ring, and the first rotating adjusting gear ring is rotatably installed on the first limiting ring. The first drive gear is meshed with the first rotating adjusting gear ring. The drive end of the fourth motor is fixedly connected to the middle of the outer end of a first drive gear. The diameter of the screening holes on the screening screen frame in the first screening section is larger than the diameter of the screening holes on the screening screen frame in the second screening section. The diameter of the screening holes on the screening screen frame in the second screening section is larger than the diameter of the screening holes on the screening screen frame in the third screening section.

[0010] Specifically, the rinsing treatment body includes a second limiting ring, a fifth motor, a second rotating adjusting gear ring, a baffle limiting frame, a fifth electric push rod, a conical guide block, a bottom support plate, a limiting support plate, a sixth electric push rod, a support upright plate, a sixth motor, a swing adjusting arm, a connecting hose, an electric control valve, a nozzle, and a second drive gear. The second rotating adjusting gear ring is rotatably engaged with the second limiting ring. The baffle limiting frame is fixedly installed inside the second rotating adjusting gear ring. The fifth motor is fixedly installed on the upper part of one side of the second limiting ring. The second drive gears are distributed on the upper parts of both sides of the second rotating adjusting gear ring, and the bottom end of the second drive gear meshes with the second rotating adjusting gear ring. The drive end of the fifth motor is fixedly connected to the middle of one of the second drive gears. The bottom support plate is adapted to slide and engage inside the baffle limiting frame. The conical guide block is fixedly installed on the bottom support plate. At the upper center of the plate, the fifth electric push rod is uniformly and symmetrically fixedly installed on the second limiting ring, and the bottom end of the fifth electric push rod is fixedly connected to the bottom of the bottom support plate. The limiting support plate is uniformly fixedly installed on the outer end of the second rotating adjusting gear ring. The bottom end of the support plate is slidably engaged with the limiting support plate. The sixth electric push rod is fixedly installed on the upper part of the outer end of the limiting support plate, and the front end of the sixth electric push rod is fixedly connected to the bottom end of the support plate. The bottom end of the swing adjusting arm is rotatably engaged with the upper end of the support plate. The sixth motor is fixedly installed on the outer side of the upper end of the support plate. The drive end of the sixth motor passes through the support plate and is fixedly connected to the outer side of the bottom end of the swing adjusting arm. The nozzle is uniformly fixedly installed on the bottom end of the swing adjusting arm. The electric control valve is fixedly installed on the upper end of the swing adjusting arm. The connecting hose is fixedly connected to the electric control valve.

[0011] Specifically, the main body for guiding and discharging includes a distribution conveying frame and a discharge frame. Three distribution conveying frames are evenly distributed, and the discharge frame is fixedly connected between the bottom ends of the distribution conveying frames.

[0012] Specifically, the bottom ends of both sides of the second limiting ring are slidably engaged with the first track support plate, the front end of the first electric push rod is fixedly connected to the upper side of the second limiting ring, the second fixed support frame is fixedly connected to the side of the second track support plate in the first screening section, the second screening section and the third screening section, and the crushing box is located directly above the screening screen frame in the first screening section.

[0013] Specifically, the three sorting conveyor frames are located below the outer side of the screening mesh frame in the first screening section, the second screening section, and the third screening section, respectively, and the inner end of the sorting conveyor frame is fixedly connected to the front end of the second track support plate.

[0014] The beneficial effects of this invention are: I. This invention employs a chemical slurry encapsulation followed by CO2 carbonization and curing. The silicate-based modified liquid effectively seals surface pores and microcracks. The subsequent carbonization reaction reacts with hydration products in the slurry, such as Ca(OH)2, to generate calcium carbonate, further densifying and strengthening the layer. This significantly reduces water absorption and crushing value compared to simple acid washing or purely physical strengthening. The modified liquid is mainly composed of inorganic materials such as cement, fly ash, and silica fume, avoiding secondary pollution problems caused by organic solvents or strong acids. The carbonization process fixes CO2, providing environmental benefits. The process design solves the defects of recycled aggregate adhering to old mortar and internal microcracks. Pretreatment removes impurities, the modified liquid penetrates and repairs, and carbonization and curing enhance the structure.

[0015] II. The device of this invention integrates functions such as crushing, screening, washing, and collection into one frame, realizing continuous operation from large pieces of waste concrete to clean, graded aggregates. This significantly reduces material transfer and improves overall processing efficiency. The pretreatment main body adopts a two-stage crushing design with a hydraulic extrusion plate and double auxiliary crushing wheels. The adjustable spacing of the crushing wheels can adapt to materials of different hardness and different target particle size requirements, avoiding over-crushing, saving energy and increasing efficiency. The three-stage screening section has the same structure but the screen holes gradually decrease, enabling precise grading. Each screening frame can independently perform forward and reverse swing screening, resulting in high screening efficiency and less clogging. Furthermore, a single screen frame can be moved out of the work position by an electric push rod, providing high flexibility. The entire washing plate can rotate, ensuring uniform washing of materials. The nozzle arm can be raised, lowered, and swung, enabling all-round, dead-angle washing of the material to ensure cleaning effect. The bottom support plate can be raised and lowered, closing to store water during washing and lowering to expand the gap during unloading, achieving wastewater separation and dry material discharge. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a schematic diagram of the main structure of the present invention; Figure 2 This is a side view of the three-dimensional structure of the main body in this invention; Figure 3 This is a schematic diagram of the bottom structure of the pretreatment body in this invention; Figure 4 This is a schematic diagram of the structure of the pretreatment body in this invention; Figure 5 This is a schematic diagram of the internal structure of the crushing box in this invention; Figure 6 This is a schematic diagram of the internal structure of the movable adjustment frame in this invention; Figure 7 This is a schematic diagram of the structure of the sieving body in this invention; Figure 8This is a schematic diagram of the structure of the first screening section in this invention; Figure 9 This is a schematic diagram of the structure of the rinsing treatment body in this invention; Figure 10 This is a schematic diagram of the bottom structure of the rinsing treatment body in this invention; Figure 11 This is a schematic diagram of the structure of the main body for guiding and discharging water in this invention.

[0018] In the diagram: 1-Guiding and discharging main body, 2-Washing and treatment main body, 3-First support leg, 4-Second support leg, 5-First track support plate, 6-First electric push rod, 7-Pre-treatment main body, 8-First fixed support frame, 9-Second fixed support frame, 10-Screwing main body, 11-Feed hopper, 12-Hydraulic cylinder, 13-Crushing box, 14-Fixing bolt, 15-Limiting frame, 16-Threaded hole, 17-Adjusting arm, 18-Third electric push rod, 19-Telescopic limit ring, 20-Moving adjusting frame, 21-Supporting frame, 22-First motor, 23-Conveying connecting pipe, 24-Swing adjusting plate, 25-Spraying hole, 26-Extrusion crushing plate, 27-Crushing cone, 28-First auxiliary crushing wheel, 29-Second auxiliary crushing wheel, 30-Second motor, 100-First screening section, 31- Second screening section, 32-Third screening section, 33-Third motor, 34-Screening frame, 35-First rotating adjusting gear ring, 36-First drive gear, 37-First limiting ring, 38-Fourth motor, 39-Rotating support arm, 40-Support base, 41-Second track support plate, 42-Fourth electric push rod, 43-Second limiting ring, 44-Fifth motor, 45-Second rotating adjusting gear ring, 46-Blocking limiting frame, 47-Fifth electric push rod, 48-Conical guide block, 49-Bottom support plate, 50-Limiting support plate, 51-Sixth electric push rod, 52-Support upright plate, 53-Sixth motor, 54-Swing adjusting arm, 55-Connecting hose, 56-Electric control valve, 57-Nozzle, 58-Guiding conveyor frame, 59-Discharge frame, 60-Second drive gear. Detailed Implementation

[0019] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0020] The invention will be further described below with reference to the accompanying drawings.

[0021] The present invention provides a process for strengthening concrete using recycled coarse aggregate, comprising the following steps: S1. Raw material pretreatment: Waste concrete is crushed and screened to obtain recycled coarse aggregate with a particle size of 5-26mm, which is then washed with water to remove impurities and dried at low temperature to constant weight. S2. Composite modification treatment: Prepare composite modification liquid, immerse the pretreated recycled coarse aggregate in the composite modification liquid, use centrifugal stirring to assist in penetration, and after soaking, remove excess modification liquid from the surface by sieving. S3. Carbonization and curing treatment: The recycled coarse aggregate with the modified liquid on its surface is placed in a closed environment and CO2 gas is introduced to carry out the carbonization reaction. S4. Curing and molding: The carbonized recycled coarse aggregate is cured at a constant temperature. S5. Quality Inspection: Measure the water absorption rate, crushing value and Los Angeles abrasion value of the cured recycled coarse aggregate. If the value is qualified, it is considered reinforced recycled coarse aggregate.

[0022] In S1, the washing time is 15-30 min, the low-temperature drying temperature is 60-80℃, and the needle-like and flaky content of the recycled coarse aggregate is controlled below 10%. In S2, the composite modified liquid is composed of 40-60 parts cement, 10-15 parts silica fume, 20-30 parts fly ash, 0.8-1.2 parts silane coupling agent, and 25-40 parts deionized water by weight, with a water-binder ratio of 0.25-0.35. The stirring speed of the composite modified liquid is 800-1200 r / min, and the stirring time is 15-20 min.

[0023] In S2, the centrifugal stirring speed is 300-500 r / min, the stirring time is 30-60 s / time, stirring once every 15 min, the soaking time is 2-4 h, and the mass of the modified liquid adhering to the aggregate surface is 5%-8% of the dry mass of the aggregate. In S3, the CO2 gas purity is 90%-100%, the reaction pressure is 0.3-0.5 MPa, the reaction temperature is 25-35℃, and the carbonization and curing time is 1-2 h. In S4, the constant temperature curing temperature is 50-60℃, the relative humidity is 60%-70%, and the curing time is 6-8 h.

[0024] like Figure 1-3As shown, a device for reinforcing recycled coarse aggregate in concrete processing includes a flow guiding and discharge main body 1, a washing and treatment main body 2, a first support leg 3, a second support leg 4, a first track support plate 5, a first electric push rod 6, a pretreatment main body 7, a first fixed support frame 8, a second fixed support frame 9, and a screening main body 10. The screening main body 10 is located below the pretreatment main body 7. The second fixed support frame 9 is fixedly connected to both sides of the screening main body 10. The first fixed support frame 8 is located on both sides of the pretreatment main body 7, and the bottom end of the first fixed support frame 8 is fixedly connected to the upper end of the second fixed support frame 9. The flow guiding and discharge main body 1 is located on the outside of the screening main body 10. The first track support plates 5 are symmetrically distributed. The second support legs 4 are evenly fixedly installed at the bottom of the first track support plates 5. The first electric push rod 6 is fixedly installed on the upper part of the outer end of the first track support plate 5. The washing and treatment main body 2 is located on the first track support plate 5. The first support leg 3 is fixedly connected to the bottom end of the second fixed support frame 9. The first support leg 3 and the second support leg 4 provide stable support and fixation.

[0025] like Figure 4-6As shown, the pretreatment body 7 includes a feed hopper 11, a hydraulic cylinder 12, a crushing box 13, fixing bolts 14, a limiting frame 15, a threaded hole 16, an adjusting arm 17, a third electric push rod 18, a telescopic limiting ring 19, a movable adjusting frame 20, a support frame 21, a first motor 22, a conveying connecting pipe 23, a swing adjusting plate 24, a spray hole 25, a crushing plate 26, a crushing cone 27, a first auxiliary crushing wheel 28, a second auxiliary crushing wheel 29, and a second motor 30. The feed hopper 11 is fixedly connected to the upper end of the crushing box 13 by bolts. The support frame 21 is fixedly installed on the side end of the feed hopper 11 by bolts. The bottom end of the swing adjusting plate 24 is rotatably installed on the upper end of the support frame 21. The first motor 28... 2. Fixedly installed on the upper side of the support frame 21, and the drive end of the first motor 22 is fixedly connected to the bottom side of the swing adjustment plate 24. The conveying connection pipe 23 is evenly fixedly installed on the side of the swing adjustment plate 24. The spraying hole 25 is evenly fixedly installed on the bottom of the swing adjustment plate 24, and the conveying connection pipe 23 communicates with the inside of the spraying hole 25 through the swing adjustment plate 24. The telescopic limit ring 19 is slidably engaged inside the bottom of the crushing box 13. The third electric push rod 18 is symmetrically fixedly installed on the bottom side of the crushing box 13, and the bottom end of the third electric push rod 18 is fixedly connected to the bottom side of the telescopic limit ring 19. The hydraulic cylinder 12 is evenly tilted and fixedly installed on both sides of the upper end of the crushing box 13, and the crushing plate 26 is rotated. The crushing cone 27 is evenly and fixedly installed on the outer side of the crushing plate 26, and the front end of the hydraulic cylinder 12 is rotatably connected to the bottom inner side of the crushing plate 26. The movable adjustment frame 20 is slidably engaged with the crushing box 13, and the adjusting arms 17 are evenly and fixedly installed on both sides of the movable adjustment frame 20. The limiting frame 15 is fixedly installed on both sides of the crushing box 13, and the adjusting arms 17 are slidably inserted into the limiting frame 15. Threaded holes 16 are evenly opened through the adjusting arms 17, and fixing bolts 14 are threaded into the limiting frame 15 and the adjusting arms 17. The first auxiliary crushing wheel 28 is rotatably installed inside the movable adjustment frame 20, and the second auxiliary crushing wheel 29 is rotatably installed inside the crushing box 13. The second motor 30 is fixedly installed on the side of the movable adjustment frame 20 and the crushing box 13, and the drive ends of the two second motors 30 are respectively fixedly connected to the middle of the side ends of the first auxiliary crushing wheel 28 and the second auxiliary crushing wheel 29. The first auxiliary crushing wheel 28 and the second auxiliary crushing wheel 29 are located below the extrusion crushing plate 26. By tightening the fixing bolt 14, the adjusting arm 17 can slide inside the limiting frame 15, thereby allowing the movable adjustment frame 20 to slide outward along the crushing box 13, indirectly adjusting the distance and gap between the third electric push rod 18 and the second auxiliary crushing wheel 29, so that the level of secondary extrusion crushing completed by the first auxiliary crushing wheel 28 and the second auxiliary crushing wheel 29 can be conveniently adjusted as needed.

[0026] like Figure 7-8As shown, the screening body 10 includes a first screening section 100, a second screening section 31, and a third screening section 32. The second screening section 31 is disposed between the first screening section 100 and the third screening section 32. The first screening section 100, the second screening section 31, and the third screening section 32 have the same structure. The first screening section 100 includes a third motor 33, a screening frame 34, a first rotating adjusting gear ring 35, a first drive gear 36, a first limiting retaining ring 37, a fourth motor 38, a rotating support arm 39, a support base 40, a second track support plate 41, and a fourth electric push rod 42. The second track support plate 41 is symmetrically distributed, and the support base 40 is slidably engaged with the second track support plate 41. The fourth electric push rod 42 is fixedly installed on the second track support plate 41, and the front end of the fourth electric push rod 42 is fixedly connected to the bottom of the second track support plate 41. The bottom end of the rotating support arm 39 is rotatably installed inside the support base 40. The rotating support arm 39 is distributed on both sides of the bottom of the first limiting ring 37. The bottom edge of the screening frame 34 is rotatably engaged with the first limiting ring 37. The first rotating adjusting toothed ring 35 is fixedly installed on the screening frame 34. At the outer bottom end, the fourth motor 38 is fixedly installed on the upper side of the first limiting ring 37. The first limiting ring 37 is distributed on both sides of the upper part of the first rotation adjusting gear ring 35, and the first rotation adjusting gear ring 35 is rotatably installed on the first limiting ring 37. The first drive gear 36 is meshed with the first rotation adjusting gear ring 35. The drive end of the fourth motor 38 is fixedly connected to the middle of the outer end of one of the first drive gears 36. The sieve hole diameter provided on the sieve frame 34 in the first screening section 100 is larger than that provided on the sieve frame 34 in the second screening section 31. The sieve aperture diameter is larger on the sieve frame 34 in the second screening section 31 than on the sieve frame 34 in the third screening section 32. The fourth motor 38 drives the first drive gear 36 to rotate forward and backward, thereby causing the sieve frame 34 to rotate and swing rapidly forward and backward through the first rotating adjustment gear ring 35. This allows the material falling into the sieve frame 34 to be quickly screened. Then, particles of the correct size fall into the second screening section 31 and the third screening section 32 for screening in the same way, thus allowing the crushed particles to undergo three screening processes.

[0027] like Figure 9-10As shown, the rinsing treatment body 2 includes a second limiting ring 43, a fifth motor 44, a second rotating adjusting gear ring 45, a baffle limiting frame 46, a fifth electric push rod 47, a conical guide block 48, a bottom support plate 49, a limiting support plate 50, a sixth electric push rod 51, a support upright plate 52, a sixth motor 53, a swing adjusting arm 54, a connecting hose 55, an electric control valve 56, a nozzle 57, and a second drive gear 60. The second rotating adjusting gear ring 45 is rotatably engaged with the second limiting ring 43, and the baffle limiting frame 46 is fixedly installed inside the second rotating adjusting gear ring 45. The motor 44 is fixedly installed on the upper side of the second limiting ring 43. The second drive gear 60 is distributed on both sides of the upper part of the second rotation adjustment gear ring 45, and the bottom end of the second drive gear 60 is meshed with the second rotation adjustment gear ring 45. The drive end of the fifth motor 44 is fixedly connected to the middle of one of the second drive gears 60. The bottom support plate 49 is adapted to slide and snap into the inside of the partition limit frame 46. The tapered guide block 48 is fixedly installed in the middle of the upper end of the bottom support plate 49. The fifth electric push rod 47 is evenly and symmetrically fixedly installed on the second limiting ring 43, and the bottom of the fifth electric push rod 47 is... The bottom of the support plate 49 is fixedly connected to the bottom of the support plate 52. The limiting support plate 50 is evenly fixedly installed on the outer side of the second rotating adjusting gear ring 45. The bottom end of the support plate 52 is slidably engaged with the limiting support plate 50. The sixth electric push rod 51 is fixedly installed on the upper part of the outer side of the limiting support plate 50, and the front end of the sixth electric push rod 51 is fixedly connected to the bottom end of the support plate 52. The bottom end of the swing adjusting arm 54 is rotatably engaged with the inner part of the upper end of the support plate 52. The sixth motor 53 is fixedly installed on the outer side of the upper end of the support plate 52. The drive end of the sixth motor 53 passes through the support plate 52 and the swing adjustment arm 54. The bottom outer side of the adjusting arm 54 is fixedly connected, and the nozzles 57 are evenly fixedly installed at the bottom of the swing adjusting arm 54. The electric control valve 56 is fixedly installed at the upper end of the swing adjusting arm 54, and the connecting hose 55 is fixedly connected to the electric control valve 56. Starting the sixth motor 53 can make the swing adjusting arm 54 rotate on the support plate 52, and the sixth electric push rod 51 can drive the support plate 52 to slide along the limit support plate 50, so that the tilt position angle and area of ​​each nozzle 57 can be easily adjusted, so that the particulate material on the bottom support plate 49 can be fully washed.

[0028] like Figure 11 As shown, the main body 1 for guiding and discharging includes a distribution conveying frame 58 and a discharge frame 59. Three distribution conveying frames 58 are evenly distributed, and the discharge frame 59 is fixedly connected between the bottom ends of the distribution conveying frames 58.

[0029] The bottom ends of the two sides of the second limiting ring 43 are slidably engaged with the first track support plate 5. The front end of the first electric push rod 6 is fixedly connected to the upper side of the second limiting ring 43. The second fixed support frame 9 is fixedly connected to the side of the second track support plate 41 in the first screening section 100, the second screening section 31 and the third screening section 32. The crushing box 13 is located directly above the screening screen frame 34 in the first screening section 100. The three guide conveyor frames 58 are located below the outer side of the screening screen frame 34 in the first screening section 100, the second screening section 31 and the third screening section 32 respectively. The inner end of the guide conveyor frame 58 is fixedly connected to the front end of the second track support plate 41, which makes it easy to recycle and process the intercepted large particles.

[0030] Working principle: During operation, construction waste such as waste concrete is first fed into the upper part of the crushing box 13 through the feed hopper 11. At this time, the symmetrically distributed hydraulic cylinders 12 cause the symmetrically rotating compression crushing plates 26 inside the upper part of the crushing box 13 to swing and crush, so that the waste material fed into the upper part of the crushing box 13 is pre-crushed. The first auxiliary crushing wheel 28 and the second auxiliary crushing wheel 29 are located directly below the compression crushing plate 26, so that the material fed into the crushing box 13 is supported and limited by the first auxiliary crushing wheel 28 and the second auxiliary crushing wheel 29 and is fully crushed by the symmetrically rotating compression crushing plate 26. Then, the second motor 30 is started to make the first auxiliary crushing wheel 28... The first auxiliary crushing wheel 28 and the second auxiliary crushing wheel 29 rotate synchronously, allowing the material conveyed between the first auxiliary crushing wheel 28 and the second auxiliary crushing wheel 29 to undergo secondary crushing. According to the crushing requirements, the adjusting arm 17 can slide inside the limiting frame 15 by tightening the fixing bolt 14, thereby causing the moving adjusting frame 20 to slide outward along the crushing box 13. This indirectly adjusts the distance and gap between the third electric push rod 18 and the second auxiliary crushing wheel 29, allowing the level of secondary crushing by the first auxiliary crushing wheel 28 and the second auxiliary crushing wheel 29 to be easily adjusted as needed. The material crushed by the first auxiliary crushing wheel 28 and the second auxiliary crushing wheel 29 moves along the crushing box 13 and the telescopic limiting ring 19. The material is discharged into the screening frame 34 in the first screening section 100. Then, the fourth motor 38 in the first screening section 100 is controlled by an external control system. The fourth motor 38 drives the first drive gear 36 to rotate forward and backward, thereby causing the screening frame 34 to rotate and swing rapidly forward and backward through the first rotating adjusting gear ring 35. This allows the material falling into the screening frame 34 to be quickly screened. Then, particles that meet the size requirements fall into the second screening section 31 and the third screening section 32 for screening in the same way. Thus, the crushed particles undergo three screening processes. Particles that meet the requirements are discharged from the screening frame 34 in the third screening section 32. Finally, large particles intercepted in each screening frame 34 are discharged by starting the third motor 38. 3. Discharge: The third motor 33 drives the rotating support arm 39 to rotate inside the support base 40, causing the first limiting ring 37 and the screening frame 34 to rotate as a whole. This causes the large particles intercepted in each screening frame 34 to be poured into the guiding and conveying frame 58, and then enter the discharge frame 59 for centralized guiding, conveying and collection. The collected particles are then added back into the crushing box 13 for crushing. When three fine screening processes are not required during the screening process, the fourth electric push rod 42 can be activated to selectively slide one or two screening frames 34 along the second track support plate 41, so that the screening frame 34 can be moved out from under the telescopic limiting ring 19. The composite material discharged from the bottom of the screening frame 34 in the third screening section 32 falls onto the bottom support plate 49 in the partition limit frame 46. It is then positioned as close as possible to the edge of the bottom support plate 49 by the conical guide block 48 and limited by the partition limit frame 46. Each connecting hose 55 is then connected to an external clean water supply device. Under the control of the electric control valve 56, each nozzle 57 sprays clean water into the bottom support plate 49 through the connecting hoses 55, completing the cleaning of the compliant granular material. Wastewater containing impurities is discharged through the gap between the bottom support plate 49 and the bottom edge of the partition limit frame 46 and collected by the collection device below. During the cleaning process, the fifth motor 44 is activated, driving a second drive gear 60 to rotate in both directions, thereby adjusting the rinsing position of each nozzle 57. The sixth motor 53 is activated, causing the swing adjustment arm 54 to rotate on the support plate 52, and the sixth electric push rod 51 can drive the support... The vertical plate 52 slides along the limiting support plate 50, allowing the tilt angle and area of ​​each nozzle 57 to be easily adjusted, ensuring that the granular material on the bottom support plate 49 is fully rinsed. After rinsing for a specified time, the first electric push rod 6 is activated to move the entire rinsing body 2 outward along the first track support plate 5. At the specified position, the fifth electric push rod 47 is activated, causing the bottom support plate 49 to move downward, separating it from the partition limit frame 46. This increases the gap between the bottom end of the partition limit frame 46 and the bottom support plate 49. Since the upper end of the bottom support plate 49 is conical and a conical guide block 48 is provided in the middle, the cleaned material can slide down and be discharged from the large gap between the edge of the bottom support plate 49 and the bottom end of the partition limit frame 46 along the conical guide block 48 and the bottom support plate 49, falling into the material collection box or conveyor belt at the bottom of the rinsing body 2.

[0031] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A process for reinforcing concrete with recycled coarse aggregate, characterized in that, Includes the following steps: S1. Raw material pretreatment: Waste concrete is crushed and screened to obtain recycled coarse aggregate with a particle size of 5-26mm, which is then washed with water to remove impurities and dried at low temperature to constant weight. S2. Composite modification treatment: Prepare composite modification liquid, immerse the pretreated recycled coarse aggregate in the composite modification liquid, use centrifugal stirring to assist in penetration, and after soaking, remove excess modification liquid from the surface by sieving. S3. Carbonization and curing treatment: The recycled coarse aggregate with the modified liquid on its surface is placed in a closed environment and CO2 gas is introduced to carry out the carbonization reaction. S4. Curing and molding: The carbonized recycled coarse aggregate is cured at a constant temperature. S5. Quality Inspection: Determine the water absorption rate, crushing value, and Los Angeles abrasion value of the cured recycled coarse aggregate.

2. The recycled coarse aggregate strengthening process for concrete processing according to claim 1, characterized in that: The washing time in S1 is 15-30 minutes, the low-temperature drying temperature is 60-80℃, and the needle-like and flaky content of the recycled coarse aggregate is controlled below 10%. The composite modified liquid in S2 is composed of 40-60 parts cement, 10-15 parts silica fume, 20-30 parts fly ash, 0.8-1.2 parts silane coupling agent and 25-40 parts deionized water by weight, with a water-binder ratio of 0.25-0.

35. The stirring speed of the composite modified liquid is 800-1200 r / min and the stirring time is 15-20 min.

3. The recycled coarse aggregate strengthening process for concrete processing according to claim 2, characterized in that: In S2, the centrifugal stirring speed is 300-500 r / min, the stirring time is 30-60 s / time, stirring once every 15 min, the soaking time is 2-4 h, and the mass of the modified liquid adhering to the aggregate surface is 5%-8% of the dry mass of the aggregate; In S3, the CO2 gas purity is 90%-100%, the reaction pressure is 0.3-0.5MPa, the reaction temperature is 25-35℃, and the carbonization and curing time is 1-2h. In S4, the constant temperature curing temperature is 50-60℃, the relative humidity is 60%-70%, and the curing time is 6-8h.

4. A device for reinforcing recycled coarse aggregate in concrete processing, applicable to the recycled coarse aggregate reinforcing process in concrete processing as described in claim 3, characterized in that: The system includes a flow-guiding discharge body (1), a flushing treatment body (2), a first support leg (3), a second support leg (4), a first track support plate (5), a first electric push rod (6), a pretreatment body (7), a first fixed support frame (8), a second fixed support frame (9), and a screening body (10). The screening body (10) is located below the pretreatment body (7). The second fixed support frame (9) is fixedly connected to both sides of the screening body (10). The first fixed support frame (8) is located on both sides of the pretreatment body (7), and the first fixed support frame (9) is fixedly connected to both sides of the screening body (10). The bottom end of 8) is fixedly connected to the upper end of the second fixed support frame (9). The guide discharge body (1) is set on the outside of the screening body (10). The first track support plate (5) is symmetrically distributed. The second support leg (4) is evenly fixedly installed at the bottom of the first track support plate (5). The first electric push rod (6) is fixedly installed on the upper part of the outer end of the first track support plate (5). The rinsing treatment body (2) is set on the first track support plate (5). The first support leg (3) is fixedly connected to the bottom end of the second fixed support frame (9).

5. A device for reinforcing recycled coarse aggregate in concrete processing according to claim 4, characterized in that: The pretreatment body (7) includes a feed hopper (11), a hydraulic cylinder (12), a crushing box (13), fixing bolts (14), a limiting frame (15), a threaded hole (16), an adjusting arm (17), a third electric push rod (18), a telescopic limiting ring (19), a movable adjusting frame (20), a support frame (21), a first motor (22), a conveying connecting pipe (23), a swing adjusting plate (24), a spray hole (25), a crushing plate (26), a crushing cone (27), a first auxiliary crushing wheel (28), a second auxiliary crushing wheel (29), and a second motor (30). The feed hopper (11) is fixedly connected to the upper end of the crushing box (13) by bolts, and the support frame (21) is fixedly connected to the upper end of the crushing box (13) by bolts. Bolts are fixedly installed on the side end of the feed hopper (11), the bottom end of the swing adjustment plate (24) is rotatably installed on the upper end of the support frame (21), the first motor (22) is fixedly installed on the upper side end of the support frame (21), and the drive end of the first motor (22) is fixedly connected to the bottom side end of the swing adjustment plate (24), the conveying connection pipe (23) is evenly fixedly installed on the side end of the swing adjustment plate (24), the spray hole (25) is evenly fixedly installed on the bottom end of the swing adjustment plate (24), and the conveying connection pipe (23) communicates with the inside of the spray hole (25) through the swing adjustment plate (24), and the telescopic limiting ring (19) is slidably engaged with the crushing box (11). 3) Inside the bottom end, the third electric push rod (18) is symmetrically fixedly installed on the bottom side of the crushing box (13), and the bottom end of the third electric push rod (18) is fixedly connected to the bottom side of the telescopic limiting ring (19). The hydraulic cylinder (12) is evenly inclined and fixedly installed on both sides of the upper end of the crushing box (13). The extrusion crushing plate (26) is rotatably installed inside the upper end of the crushing box (13). The crushing cone (27) is evenly fixedly installed on the outer side of the extrusion crushing plate (26), and the front end of the hydraulic cylinder (12) is rotatably connected to the bottom inner side of the extrusion crushing plate (26). The movable adjustment frame (20) is slidably engaged on the crushing box (13). Adjusting arms (17) are evenly and fixedly installed on both sides of the movable adjusting frame (20), and limiting frames (15) are fixedly installed on both sides of the crushing box (13). The adjusting arms (17) are slidably inserted into the limiting frames (15). Threaded holes (16) are evenly opened through the adjusting arms (17). Fixing bolts (14) are threaded into the limiting frames (15) and the adjusting arms (17). The first auxiliary crushing wheel (28) is rotatably installed inside the movable adjusting frame (20), and the second auxiliary crushing wheel (29) is rotatably installed inside the crushing box (13). The second motor (30) is fixedly installed on the side ends of the movable adjusting frame (20) and the crushing box (13).Furthermore, the drive ends of the two second motors (30) are fixedly connected to the middle of the side ends of the first auxiliary crushing wheel (28) and the second auxiliary crushing wheel (29), respectively, with the first auxiliary crushing wheel (28) and the second auxiliary crushing wheel (29) located below the extrusion crushing plate (26).

6. The device for reinforcing recycled coarse aggregate in concrete processing according to claim 5, characterized in that: The screening body (10) includes a first screening section (100), a second screening section (31), and a third screening section (32). The second screening section (31) is located between the first screening section (100) and the third screening section (32). The first screening section (100), the second screening section (31), and the third screening section (32) have the same structure. The first screening section (100) includes a third motor (33), a screening frame (34), a first rotating adjusting gear ring (35), a first drive gear (36), a first limiting retaining ring (37), a fourth motor (38), and a rotating... The system comprises a support arm (39), a support base (40), a second track support plate (41), and a fourth electric push rod (42). The second track support plate (41) is symmetrically arranged. The support base (40) is slidably engaged with the second track support plate (41). The fourth electric push rod (42) is fixedly installed on the second track support plate (41), and the front end of the fourth electric push rod (42) is fixedly connected to the bottom of the second track support plate (41). The bottom end of the rotating support arm (39) is rotatably installed inside the support base (40). Support arms (39) are distributed on both sides of the bottom of the first limiting ring (37). The bottom edge of the screening frame (34) is rotatably engaged with the first limiting ring (37). The first rotating adjusting toothed ring (35) is fixedly installed on the outer bottom of the screening frame (34). The fourth motor (38) is fixedly installed on one side of the upper part of the first limiting ring (37). The first limiting ring (37) is distributed on both sides of the upper part of the first rotating adjusting toothed ring (35), and the first rotating adjusting toothed ring (35) is rotatably mounted on the first limiting ring (37). On the first drive gear (36), the first drive gear (36) meshes with the first rotating adjustment gear ring (35). The drive end of the fourth motor (38) is fixedly connected to the middle of the outer end of the first drive gear (36). The sieve hole diameter on the sieve frame (34) in the first screening section (100) is larger than the sieve hole diameter on the sieve frame (34) in the second screening section (31). The sieve hole diameter on the sieve frame (34) in the second screening section (31) is larger than the sieve hole diameter on the sieve frame (34) in the third screening section (32).

7. A device for reinforcing recycled coarse aggregate in concrete processing according to claim 6, characterized in that: The flushing treatment body (2) includes a second limiting ring (43), a fifth motor (44), a second rotating adjusting gear ring (45), a partition limiting frame (46), a fifth electric push rod (47), a conical guide block (48), a bottom support plate (49), a limiting support plate (50), a sixth electric push rod (51), a support upright plate (52), a sixth motor (53), a swing adjusting arm (54), a connecting hose (55), an electric control valve (56), a nozzle (57), and a second drive gear (60). The second rotating adjusting gear ring (45) is rotatably engaged with the second limiting ring (43). The partition limiting frame... (46) is fixedly installed inside the second rotating adjusting gear ring (45). The fifth motor (44) is fixedly installed on the upper part of one side of the second limiting ring (43). The second drive gear (60) is distributed on the upper parts of both sides of the second rotating adjusting gear ring (45), and the bottom end of the second drive gear (60) is meshed with the second rotating adjusting gear ring (45). The drive end of the fifth motor (44) is fixedly connected to the middle part of one of the second drive gears (60). The bottom support plate (49) is adapted to slide and snap into the inside of the partition limiting frame (46). The conical guide block (48) is fixed. The fifth electric push rod (47) is uniformly and symmetrically fixedly installed on the second limiting ring (43) at the upper middle part of the bottom support plate (49), and the bottom end of the fifth electric push rod (47) is fixedly connected to the bottom of the bottom support plate (49). The limiting support plate (50) is uniformly and symmetrically fixedly installed on the outer end of the second rotating adjusting gear ring (45). The bottom end of the support plate (52) is slidably engaged with the limiting support plate (50). The sixth electric push rod (51) is fixedly installed on the upper part of the outer end of the limiting support plate (50), and the front end of the sixth electric push rod (51) is connected to the support plate (49). The bottom end of the upright plate (52) is fixedly connected, the bottom end of the swing adjustment arm (54) is rotatably locked inside the upper end of the supporting upright plate (52), the sixth motor (53) is fixedly installed on the upper outer side of the supporting upright plate (52), the drive end of the sixth motor (53) passes through the supporting upright plate (52) and is fixedly connected to the bottom outer side of the swing adjustment arm (54), the nozzle (57) is evenly fixedly installed on the bottom end of the swing adjustment arm (54), the electric control valve (56) is fixedly installed on the upper end of the swing adjustment arm (54), and the connecting hose (55) is fixedly connected to the electric control valve (56).

8. A device for reinforcing recycled coarse aggregate in concrete processing according to claim 7, characterized in that: The main body (1) for guiding and discharging includes a distribution conveying frame (58) and a discharge frame (59). Three distribution conveying frames (58) are evenly distributed, and the discharge frame (59) is fixedly connected between the bottom ends of the distribution conveying frames (58).

9. A device for reinforcing recycled coarse aggregate in concrete processing according to claim 8, characterized in that: The bottom ends of the second limiting ring (43) are slidably engaged with the first track support plate (5). The front end of the first electric push rod (6) is fixedly connected to the upper side of the second limiting ring (43). The second fixed support frame (9) is fixedly connected to the side of the second track support plate (41) in the first screening section (100), the second screening section (31) and the third screening section (32). The crushing box (13) is located directly above the screening frame (34) in the first screening section (100).

10. A device for reinforcing recycled coarse aggregate in concrete processing according to claim 9, characterized in that: The three sorting conveyor frames (58) are located below the outer side of the screening mesh frame (34) in the first screening section (100), the second screening section (31) and the third screening section (32), respectively. The inner end of the sorting conveyor frame (58) is fixedly connected to the front end of the second track support plate (41).

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