Preparation method of high-performance emulsified asphalt cold recycled mixture

Abstract

The invention discloses a preparation method of a high-performance emulsified asphalt cold-recycled mixture, and particularly relates to the technical field of asphalt preparation, and the preparation method comprises the following steps: step 1, RAP old material pretreatment: crushing and screening RAP old materials by using a preparation device, and stacking the screened RAP old materials of different grades in different areas; the RAP old materials, the new aggregate and cement are placed in a mixing device to be mixed, and the mixing time is 15-35 S. By arranging the preparation device, the RAP old materials can be subjected to automatic crushing treatment, the crushed RAP old materials are subjected to automatic multi-stage screening treatment, and the production efficiency is improved. And the RAP old materials with different particle sizes after screening treatment are classified and cached, so that the RAP old materials with different particle sizes in corresponding proportions can be added according to the preparation requirements of the high-performance emulsified asphalt cold-recycled mixture, and the preparation performance and the preparation flexibility of the high-performance emulsified asphalt cold-recycled mixture are improved.

Description

Technical Field

[0001] This invention relates to the field of asphalt preparation technology, specifically to a method for preparing high-performance emulsified asphalt cold recycled mixture. Background Technology

[0002] High-grade highways generate a large amount of asphalt pavement waste (RAP) during major and medium-term maintenance. If these RAP materials are discarded, it will not only occupy a lot of land and pollute the environment, but also be a huge waste of non-renewable resources. Therefore, RAP materials will be recycled efficiently and with high value.

[0003] Asphalt pavement recycling technology, especially plant-mixed cold recycling technology, has been widely used due to its advantages such as low energy consumption, low pollution, and simple process. Among them, emulsified asphalt cold recycling technology is a process in which RAP material, new aggregate, emulsified asphalt, water and necessary admixtures are mixed at room temperature to form a cold recycled mixture, which is then paved and compacted. This technology can effectively utilize a high proportion (usually more than 90%) of RAP material, which greatly reduces the cost of new materials and energy consumption.

[0004] In the preparation of cold recycled asphalt mixtures, emulsified asphalt is used as a binder and mixed with additives such as RAP, new aggregates, and cement in a certain proportion. During the mixing, paving, and compaction processes, the water in the emulsified asphalt gradually evaporates, and the asphalt particles re-aggregate and coat the aggregate surface, restoring their bonding properties, thereby forming a pavement structure material with certain strength and stability.

[0005] However, traditional methods for preparing high-performance emulsified asphalt cold recycled mixtures often involve mixing emulsified asphalt, water, and RAP material in large quantities simultaneously at once. This can easily lead to uneven mixing or premature demulsification of the emulsified asphalt, affecting the uniformity and final performance of the mixture. To address these issues, we propose a method for preparing high-performance emulsified asphalt cold recycled mixtures. Summary of the Invention

[0006] The purpose of this invention is to provide a method for preparing high-performance emulsified asphalt cold recycled mixture, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a method for preparing high-performance emulsified asphalt cold recycled mixture, comprising the following steps: Step 1: RAP material pretreatment: The RAP material is crushed and screened using a preparation device, and the different grades of RAP material after screening are stacked separately. Step 2, Aggregate Mixing: Place the old RAP material, new aggregate and cement into the mixing device and mix for 15-35 seconds; Then, emulsified asphalt is added and mixed for 25-50 seconds. Subsequently, water is added for final mixing, with a mixing time of 75-125 seconds, to prepare a high-performance emulsified asphalt cold recycled mixture. Step 3: Store the prepared high-performance emulsified asphalt cold recycled mixture for no more than 2-4 hours.

[0008] Preferably, the high-performance emulsified asphalt cold recycled mixture comprises, according to the benchmark proportion, 88%-92% RAP recycled material, 5%-8% new aggregate, 1.5%-2.5% cement, 4.5%-6.0% emulsified asphalt and 2.0%-3.0% water.

[0009] Preferably, the preparation device includes a crushing mechanism, a screening mechanism below the crushing mechanism, a storage mechanism at the bottom of the screening mechanism, a material gathering frame fixedly installed at the bottom of the storage mechanism, a feeding mechanism vertically installed in the middle of the material gathering frame, and a mixing device fixedly installed at the bottom of the material gathering frame. The preparation device further includes a first base, the crushing mechanism is fixedly installed on the top of the first base, the screening mechanism is installed on the first base, a second base is provided below the first base, the material storage mechanism is fixedly installed on the second base, a third base is provided below the second base, the material gathering frame is fixedly clamped on the third base, and the feeding mechanism is fixedly installed on the top of the third base.

[0010] Preferably, the crushing mechanism includes a crushing cylinder, which is fixedly installed on the top of a first base. A feed inlet is fixedly installed on one side of the top of the crushing cylinder, and a discharge outlet is fixedly installed on one side of the bottom of the crushing cylinder. A downwardly eccentrically rotating drive shaft is provided inside the crushing cylinder. A rotary push frame is fixedly installed on the outer side of the drive shaft. Multiple evenly distributed inner grooves are formed on the outer side of the rotary push frame. Crushing protrusions are fixedly installed on the inner walls of the inner grooves and the inner wall of the crushing cylinder. A first motor is fixedly installed on the side end of the crushing cylinder. The first motor drives... The moving end and the shaft end of the drive horizontal shaft are fixedly installed. An arc-shaped groove is opened at the discharge port position. An arc-shaped blocking plate is movably locked in the arc-shaped groove. An arc-shaped rack extends from the side end of the arc-shaped blocking plate. A drive gear is meshed with the outer side of the arc-shaped rack. A gear horizontal shaft is fixedly installed in the middle of the drive gear. A rotating seat is fixedly installed at the bottom outer side of the crushing cylinder. The gear horizontal shaft is rotatably installed on the rotating seat. A second motor is fixedly installed on the side end of one of the rotating seats. The drive end of the second motor and the shaft end of the gear horizontal shaft are fixedly installed.

[0011] Preferably, the screening mechanism includes a screening outer frame, which is slidably mounted on a first base. An inlet corresponding to the outlet is opened on one side of the screening outer frame. A first screen plate, a second screen plate, a third screen plate, and a guide plate are fixedly installed from top to bottom within the screening outer frame. Multiple evenly distributed longitudinal through plates are fixedly installed on the inner bottom of the screening outer frame, forming a longitudinal through groove between adjacent longitudinal through plates. The ends of the first screen plate, the second screen plate, the third screen plate, and the guide plate are respectively positioned at the top of the corresponding longitudinal through groove. Multiple evenly distributed fixed seats are fixedly installed on the outer side of the screening outer frame. A vibrator is provided at the top of each fixed seat, and the vibrator is fixedly mounted on the first base. The vibrating end of the vibrator is fixedly installed to the corresponding fixed seat.

[0012] Preferably, the storage mechanism includes two storage side plates, which are fixedly installed on a second base. Multiple sets of storage longitudinal plates, corresponding to the positions of the longitudinal channels, are fixedly installed between the storage side plates. Each set of storage longitudinal plates is movably engaged with the bottom of the corresponding longitudinal channel, forming a storage channel between each set of storage longitudinal plates. A control frame is provided at the bottom of the storage channel, and the control frame is movably engaged with a corresponding set of storage longitudinal plates. A rotating horizontal shaft is fixedly installed at the shaft end of the control frame, and the rotating horizontal shaft is rotatably installed on the storage side plate. A transmission gear is fixedly installed at one end of the rotating horizontal shaft, and a transmission rack is meshed with the outer side of the transmission gear. A positioning frame is vertically slidably installed on the transmission rack, and the positioning frame is fixedly installed on the outer side of the storage side plate. A lifting cylinder is fixedly installed on the outer wall of the storage side plate near the transmission rack, and the drive end of the lifting cylinder is fixedly installed with the top end of the corresponding transmission rack.

[0013] Preferably, the feeding mechanism includes a feeding cross frame, which is vertically installed in the middle of the material gathering longitudinal frame. A mounting frame is fixedly installed at the bottom end of the feeding cross frame, and the mounting frame is fixedly installed at the top of the third base. A plurality of evenly distributed guide rollers are rotatably installed in the feeding cross frame, and a conveyor belt is movably sleeved on the outer side of the plurality of guide rollers. A third motor is fixedly installed at the end of the feeding cross frame away from the material gathering longitudinal frame, and the drive end of the third motor is fixedly installed with the shaft end of the corresponding guide roller.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. By setting up a preparation device, RAP recycled material can be automatically crushed and then automatically screened in multiple stages. The RAP recycled material of different particle sizes after screening can be classified and buffered. Thus, according to the preparation requirements of high-performance emulsified asphalt cold recycled mixture, RAP recycled material of different particle sizes can be added in the corresponding proportion, thereby improving the preparation performance and flexibility of high-performance emulsified asphalt cold recycled mixture.

[0015] 2. By setting up a preparation device, RAP recycled materials of various particle sizes are continuously and quantitatively discharged into the aggregate longitudinal frame for aggregation. At the same time, new aggregates and cement are continuously fed into the aggregate longitudinal frame to perform primary mixing with the RAP recycled materials. Compared with the traditional method of feeding a large amount of RAP recycled materials, new aggregates and cement into the aggregate longitudinal frame for mixing, this method greatly reduces the mixing time, thereby improving the preparation efficiency of high-performance emulsified asphalt cold recycled mixture.

[0016] 3. By setting up a crushing mechanism, after the RAP old material is crushed and processed, the second motor is turned on to drive the gear shaft and drive gear to rotate, which drives the arc rack to drive the arc-shaped blocking plate to rotate, and the discharge port is opened. The crushed RAP old material is automatically discharged through the discharge port. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a flowchart of the preparation method of the high-performance emulsified asphalt cold recycled mixture of the present invention.

[0019] Figure 2 This is a schematic diagram of the preparation device in this invention.

[0020] Figure 3 This is a schematic diagram of the crushing mechanism in this invention.

[0021] Figure 4 This is a schematic diagram showing the structural connection between the crushing cylinder and the arc-shaped blocking plate in this invention.

[0022] Figure 5 This is a schematic diagram showing the structural connection between the screening mechanism and the storage mechanism in this invention.

[0023] Figure 6 This is a schematic diagram of the partial structural connection of the material storage mechanism in this invention.

[0024] Figure 7 For the present invention Figure 6 Enlarged view of point A in the middle.

[0025] Figure 8 This is a schematic diagram showing the structural connection between the aggregate frame and the feeding mechanism in this invention.

[0026] In the diagram: 1. First base; 11. Second base; 12. Third base; 2. Crushing mechanism; 21. Crushing cylinder; 211. Feed inlet; 212. Discharge outlet; 22. Drive horizontal shaft; 23. Rotary push frame; 24. First motor; 201. Crushing protrusion; 25. Arc-shaped blocking plate; 251. Arc-shaped groove; 26. Arc-shaped rack; 261. Drive gear; 262. Gear horizontal shaft; 27. Rotating seat; 28. Second motor; 3. Screening mechanism; 31. Screening outer frame; 301. Feed inlet; 32. First screen plate; 33. Second screen plate; 34. Third sieve plate; 35. Guide bottom plate; 36. Longitudinal through plate; 302. Longitudinal through groove; 37. Fixed seat; 38. Vibrator; 4. Storage mechanism; 41. Storage side plate; 42. Storage longitudinal plate; 401. Storage channel; 43. Control bottom frame; 44. Rotating horizontal shaft; 45. Transmission gear; 46. Transmission rack; 47. Positioning frame; 48. Lifting cylinder; 5. Gathering longitudinal frame; 6. Feeding mechanism; 61. Feeding horizontal frame; 62. Guide roller; 63. Conveyor belt; 64. Third motor; 611. Mounting longitudinal frame; 7. Mixing equipment. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Example: Figure 1-8 As shown, this invention provides a method for preparing high-performance emulsified asphalt cold recycled mixture, comprising the following steps: Step 1: RAP material pretreatment: The RAP material is crushed and screened using a preparation device, and the different grades of RAP material after screening are stacked separately. Step 2, Aggregate Mixing: Place the old RAP material, new aggregate and cement into the mixing device and mix for 15-35 seconds; Then, emulsified asphalt is added and mixed for 25-50 seconds. Subsequently, water is added for final mixing, with a mixing time of 75-125 seconds, to prepare a high-performance emulsified asphalt cold recycled mixture. Step 3: Store the prepared high-performance emulsified asphalt cold recycled mixture for no more than 2-4 hours.

[0029] The high-performance emulsified asphalt cold recycled mixture comprises, according to the benchmark mix proportion, 88%-92% RAP recycled material, 5%-8% new aggregate, 1.5%-2.5% cement, 4.5%-6.0% emulsified asphalt and 2.0%-3.0% water.

[0030] The preparation device includes a crushing mechanism 2, a screening mechanism 3 below the crushing mechanism 2, a storage mechanism 4 at the bottom of the screening mechanism 3, a material gathering frame 5 fixedly installed at the bottom of the storage mechanism 4, a feeding mechanism 6 vertically installed in the middle of the material gathering frame 5, and a mixing device 7 fixedly installed at the bottom of the material gathering frame 5. The preparation device also includes a first base 1, a crushing mechanism 2 fixedly installed on the top of the first base 1, a screening mechanism 3 installed on the first base 1, a second base 11 provided below the first base 1, a storage mechanism 4 fixedly installed on the second base 11, a third base 12 provided below the second base 11, a material gathering frame 5 fixedly clamped on the third base 12, and a feeding mechanism 6 fixedly installed on the top of the third base 12.

[0031] The crushing mechanism 2 includes a crushing cylinder 21, which is fixedly installed on the top of the first base 1. A feed inlet 211 is fixedly installed on one side of the top of the crushing cylinder 21, and a discharge outlet 212 is fixedly installed on one side of the bottom of the crushing cylinder 21. An arc-shaped groove 251 is provided at the position of the discharge outlet 212, and an arc-shaped blocking plate 25 is movably locked in the arc-shaped groove 251. In the initial state, the arc-shaped blocking plate 25 blocks the discharge outlet 212. A drive shaft 22 is eccentrically rotated downward in the crushing cylinder 21. A rotary push frame 23 is fixedly installed on the outer side of the drive shaft 22. Multiple evenly distributed inner grooves are opened on the outer side of the rotary push frame 23. A crushing protrusion 201 is fixedly installed on the inner wall of the inner groove and the inner wall of the crushing cylinder 21. A first motor 24 is fixedly installed on the side end of the crushing cylinder 21. The drive end of the first motor 24 is fixedly installed on the shaft end of the drive shaft 22. The RAP waste material is introduced into the crushing cylinder 21 through the feed port 211. The first motor 24 is turned on to drive the drive shaft 22 to control the rotary push frame 23 to rotate at high speed, thereby swinging the RAP waste material introduced into the crushing cylinder 21 to impact the crushing protrusion 201 for crushing. An arc-shaped rack 26 extends from the side end of the arc-shaped blocking plate 25. A drive gear 261 is meshed with the outer side of the arc-shaped rack 26. A gear shaft 262 is fixedly installed in the middle of the drive gear 261. A rotating seat 27 is fixedly installed at the bottom of the outer side of the crushing cylinder 21. The gear shaft 262 is rotatably mounted on the rotating seat 27. A second motor 28 is fixedly installed on the side end of one of the rotating seats 27. The drive end of the second motor 28 and the shaft end of the gear shaft 262 are fixedly installed. After the RAP old material is crushed and processed, the second motor 28 is turned on to drive the gear shaft 262 and the drive gear 261 to rotate. The arc-shaped rack 26 drives the arc-shaped blocking plate 25 to rotate, and the discharge port 212 is opened. The crushed RAP old material is automatically discharged through the discharge port 212.

[0032] The screening mechanism 3 includes a screening outer frame 31, which is slidably mounted on the first base 1. A feed inlet 301 corresponding to the discharge port 212 is opened on one side of the screening outer frame 31. A first screen plate 32, a second screen plate 33, a third screen plate 34, and a guide plate 35 are fixedly installed in the screening outer frame 31 from top to bottom. The RAP old material after crushing is automatically discharged through the discharge port 212 and falls onto the first screen plate 32 through the feed inlet 301. Multiple evenly distributed longitudinal plates 36 are fixedly installed on the inner bottom of the screening frame 31. A longitudinal channel 302 is formed between two adjacent longitudinal plates 36. The ends of the first screen plate 32, the second screen plate 33, the third screen plate 34, and the guide plate 35 are respectively placed on the top of the corresponding longitudinal channel 302. The screen holes of the first screen plate 32, the second screen plate 33, and the third screen plate 34 are gradually reduced. Multiple evenly distributed fixed seats 37 are fixedly installed on the outer side of the screening frame 31. The top of the fixed seat 37 is equipped with a vibrator 38. The vibrator 38 is fixedly installed on the first base 1. The vibrating end of the vibrator 38 is fixedly installed with the corresponding fixed seat 37. By turning on the multiple vibrators 38, the screening frame 31, the first screen plate 32, the second screen plate 33, the third screen plate 34, and the guide plate 35 are controlled to vibrate longitudinally, so as to automatically perform multi-stage screening of the crushed RAP waste material. The RAP waste material of different particle sizes after screening is introduced into the corresponding longitudinal channel 302.

[0033] The storage mechanism 4 includes two storage side plates 41, which are fixedly installed on the second base 11. Multiple sets of storage longitudinal plates 42, corresponding to the positions of the longitudinal channels 302, are fixedly installed between the storage side plates 41. Each set of storage longitudinal plates 42 is movably engaged with the bottom of the corresponding longitudinal channel 302, and a storage channel 401 is formed between each set of storage longitudinal plates 42. A material control frame 43 is provided at the bottom of the storage channel 401. In the initial state, the material control frame 43 blocks the bottom of the storage channel 401. RAP waste materials of different particle sizes are introduced into the corresponding longitudinal channels 302 and fall into the corresponding storage channel 401 for buffering. The material control frame 43 is movably engaged in a corresponding set of storage longitudinal plates 42. A rotating horizontal shaft 44 is fixedly installed on the shaft end of the material control frame 43. The rotating horizontal shaft 44 is rotatably mounted on the storage side plate 41. A transmission gear 45 is fixedly installed on one end of the rotating horizontal shaft 44. A transmission rack 46 is meshed with the outer side of the transmission gear 45. A positioning frame 47 is vertically slidably installed on the transmission rack 46. The positioning frame 47 is fixedly installed on the outer side of the storage side plate 41. A lifting cylinder 48 is fixedly installed on the outer wall of the storage side plate 41 near the transmission rack 46. The drive end of the lifting cylinder 48 is fixedly installed on the top end of the corresponding transmission rack 46. The top of the material longitudinal frame 5 and the storage side plate 41, and the bottom of the corresponding storage longitudinal plate 42 are fixedly installed. By opening the lifting cylinder 48 to extend, the transmission rack 46 is driven to descend and drive the transmission gear 45 to rotate, thereby controlling the rotation of the horizontal shaft 44 to rotate and drive the material control bottom frame 43 to rotate. The bottom of the corresponding storage channel 401 is opened, and RAP recycled material of the corresponding particle size is continuously and quantitatively discharged into the aggregate longitudinal frame 5 and converged. In this way, according to the preparation requirements of high-performance emulsified asphalt cold recycled mixture, RAP recycled material of different particle sizes can be added in the corresponding proportion, thereby improving the preparation performance and preparation flexibility of high-performance emulsified asphalt cold recycled mixture.

[0034] The feeding mechanism 6 includes a feeding cross frame 61, which is vertically installed in the middle of the aggregate longitudinal frame 5. A mounting frame 611 is fixedly installed at the bottom end of the feeding cross frame 61, and the mounting frame 611 is fixedly installed at the top of the third base 12. Multiple evenly distributed guide rollers 62 are rotatably installed in the feeding cross frame 61. A conveyor belt 63 is movably sleeved on the outer side of the multiple guide rollers 62. A third motor 64 is fixedly installed at the end of the feeding cross frame 61 away from the aggregate longitudinal frame 5. The drive end of the third motor 64 is fixedly installed to the shaft end of the corresponding guide roller 62. Multiple particle sizes of RA... While the P-type recycled material is continuously and quantitatively fed into the aggregate frame 5, the third motor 64 is activated to drive the corresponding guide roller 62 to rotate, controlling the conveyor belt 63 to transport the corresponding amount of new aggregate and cement. The new aggregate and cement are transported synchronously, and the new aggregate and cement are continuously fed into the aggregate frame 5 to perform primary mixing with the RAP recycled material. Compared with the traditional method of mixing a large amount of RAP recycled material, new aggregate and cement at once, this method greatly reduces the mixing time, thereby improving the preparation efficiency of high-performance emulsified asphalt cold recycled mixture.

[0035] Working principle: RAP waste material is introduced into crushing cylinder 21 through feed port 211. The first motor 24 is turned on to drive the drive horizontal shaft 22 to control the rotating push frame 23 to rotate at high speed, thereby swinging the RAP waste material introduced into crushing cylinder 21 and impacting crushing convex 201 for crushing. After the RAP waste material is crushed and processed, the second motor 28 is turned on to drive the gear shaft 262 and the drive gear 261 to rotate, which drives the arc rack 26 to drive the arc blocking plate 25 to rotate. The discharge port 212 is opened, and the crushed RAP waste material is automatically discharged through the discharge port 212 and falls onto the first screen plate 32 through the feed port 301. By turning on multiple vibrators 38, the screening frame 31, the first screen plate 32, the second screen plate 33, the third screen plate 34, and the guide plate 35 are controlled to vibrate longitudinally, so as to automatically perform multi-stage screening of the crushed RAP waste material. The RAP waste material of different particle sizes after screening is introduced into the corresponding longitudinal channel 302 and falls into the corresponding storage channel 401 for buffering. Subsequently, according to the requirements for preparing high-performance emulsified asphalt cold recycled mixture, RAP recycled material of different particle sizes is added in the corresponding proportion. By opening the lifting cylinder 48 to extend, the transmission rack 46 is driven to descend and drive the transmission gear 45 to rotate, thereby controlling the rotation of the horizontal shaft 44 to rotate and drive the material control bottom frame 43 to rotate. The bottom of the corresponding material storage channel 401 is opened, and RAP recycled material of the corresponding particle size is continuously and quantitatively discharged into the aggregate longitudinal frame 5 to converge. At the same time, the third motor 64 is turned on to drive the corresponding guide roller 62 to rotate, and the conveyor belt 63 is controlled to transport the corresponding amount of new aggregate and cement. The new aggregate and cement are transported synchronously and continuously fed into the aggregate frame 5 and RAP old material for primary mixing. Compared with the traditional method of feeding a large amount of RAP old material, new aggregate and cement into the mixture at one time, this method greatly reduces the mixing time, thereby improving the preparation efficiency of high-performance emulsified asphalt cold recycled mixture. The material initially mixed in the aggregate frame 5 falls into the mixing equipment 7 for mixing.

[0036] 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 method for preparing high-performance emulsified asphalt cold recycled mixture, characterized in that, Includes the following steps: Step 1: RAP material pretreatment: The RAP material is crushed and screened using a preparation device, and the different grades of RAP material after screening are stacked separately. Step 2, Aggregate Mixing: Place the old RAP material, new aggregate and cement into the mixing device and mix for 15-35 seconds; Then, emulsified asphalt is added and mixed for 25-50 seconds. Subsequently, water is added for final mixing, with a mixing time of 75-125 seconds, to prepare a high-performance emulsified asphalt cold recycled mixture. Step 3: Store the prepared high-performance emulsified asphalt cold recycled mixture for no more than 2-4 hours.

2. The method for preparing a high-performance emulsified asphalt cold recycled mixture according to claim 1, characterized in that: The high-performance emulsified asphalt cold recycled mixture comprises, according to the benchmark mix proportion, 88%-92% RAP recycled material, 5%-8% new aggregate, 1.5%-2.5% cement, 4.5%-6.0% emulsified asphalt and 2.0%-3.0% water.

3. The method for preparing a high-performance emulsified asphalt cold recycled mixture according to claim 1, characterized in that: The preparation device includes a crushing mechanism (2), a screening mechanism (3) is provided below the crushing mechanism (2), a storage mechanism (4) is provided at the bottom of the screening mechanism (3), a material gathering frame (5) is fixedly installed at the bottom of the storage mechanism (4), a feeding mechanism (6) is vertically provided in the middle of the material gathering frame (5), and a mixing device (7) is fixedly installed at the bottom of the material gathering frame (5). The preparation device further includes a first base (1), the crushing mechanism (2) is fixedly installed on the top of the first base (1), the screening mechanism (3) is installed on the first base (1), a second base (11) is provided below the first base (1), the storage mechanism (4) is fixedly installed on the second base (11), a third base (12) is provided below the second base (11), the aggregate frame (5) is fixedly clamped on the third base (12), and the feeding mechanism (6) is fixedly installed on the top of the third base (12).

4. The method for preparing a high-performance emulsified asphalt cold recycled mixture according to claim 3, characterized in that: The crushing mechanism (2) includes a crushing cylinder (21), which is fixedly installed on the top of the first base (1). A feed inlet (211) is fixedly installed on one side of the top of the crushing cylinder (21), and a discharge outlet (212) is fixedly installed on one side of the bottom of the crushing cylinder (21). A drive shaft (22) is provided in the crushing cylinder (21) for downward eccentric rotation. A rotary push frame (23) is fixedly installed on the outer side of the drive shaft (22). A plurality of evenly distributed inner grooves are provided on the outer side of the rotary push frame (23). A crushing protrusion (201) is fixedly installed on the inner wall of the inner groove and the inner wall of the crushing cylinder (21). An arc is provided at the position of the discharge outlet (212). The arc-shaped groove (251) is equipped with an arc-shaped blocking plate (25). An arc-shaped rack (26) extends from the side end of the arc-shaped blocking plate (25). A drive gear (261) is meshed with the outer side of the arc-shaped rack (26). A gear shaft (262) is fixedly installed in the middle of the drive gear (261). A rotating seat (27) is fixedly installed at the bottom of the outer side of the crushing cylinder (21). The gear shaft (262) is rotatably installed on the rotating seat (27). A second motor (28) is fixedly installed on the side end of one of the rotating seats (27). The drive end of the second motor (28) and the shaft end of the gear shaft (262) are fixedly installed.

5. The method for preparing a high-performance emulsified asphalt cold recycled mixture according to claim 4, characterized in that: The first motor (24) is fixedly installed on the side end of the crushing cylinder (21), and the drive end of the first motor (24) and the shaft end of the drive horizontal shaft (22) are fixedly installed.

6. The method for preparing a high-performance emulsified asphalt cold recycled mixture according to claim 4, characterized in that: The screening mechanism (3) includes a screening outer frame (31), which is slidably mounted on the first base (1). One side of the screening outer frame (31) has an inlet (301) corresponding to the outlet (212). From top to bottom, the screening outer frame (31) is fixedly installed with a first screen plate (32), a second screen plate (33), a third screen plate (34), and a guide plate (35). The inner bottom of the screening outer frame (31) is fixedly installed with a plurality of evenly distributed longitudinal through plates (36). Adjacent longitudinal through plates... (36) form a longitudinal through groove (302). The ends of the first screen plate (32), the second screen plate (33), the third screen plate (34), and the guide plate (35) are respectively placed on the top of the corresponding longitudinal through groove (302). A plurality of uniformly distributed fixed seats (37) are fixedly installed on the outer side of the screening frame (31). The top of the fixed seat (37) is provided with a vibrator (38). The vibrator (38) is fixedly installed on the first base (1). The vibrating end of the vibrator (38) and the corresponding fixed seat (37) are fixedly installed.

7. The method for preparing a high-performance emulsified asphalt cold recycled mixture according to claim 3, characterized in that: The storage mechanism (4) includes two storage side plates (41), which are fixedly installed on the second base (11). Multiple sets of storage longitudinal plates (42) corresponding to the positions of the longitudinal through grooves (302) are fixedly installed between the storage side plates (41). Each set of storage longitudinal plates (42) is movably engaged with the bottom of the corresponding longitudinal through groove (302). A storage channel (401) is formed between each set of storage longitudinal plates (42). A control frame (43) is provided at the bottom of the storage channel (401). The control frame (43) is movably engaged in the corresponding set of storage longitudinal plates (42). The shaft end of the control frame (43) is fixed. A rotating horizontal shaft (44) is fixedly installed on the storage side plate (41). A transmission gear (45) is fixedly installed at one end of the rotating horizontal shaft (44). A transmission rack (46) is meshed with the outer side of the transmission gear (45). A positioning frame (47) is vertically slidably installed on the transmission rack (46). The positioning frame (47) is fixedly installed on the outer side of the storage side plate (41). A lifting cylinder (48) is fixedly installed on the outer wall of the storage side plate (41) near the transmission rack (46). The driving end of the lifting cylinder (48) and the top end of the corresponding transmission rack (46) are fixedly installed.

8. The method for preparing a high-performance emulsified asphalt cold recycled mixture according to claim 3, characterized in that: The feeding mechanism (6) includes a feeding cross frame (61), which is vertically installed in the middle of the material gathering frame (5). A mounting frame (611) is fixedly installed at the bottom of the feeding cross frame (61), and the mounting frame (611) is fixedly installed at the top of the third base (12). A plurality of evenly distributed guide rollers (62) are rotatably installed in the feeding cross frame (61). A conveyor belt (63) is movably sleeved on the outer side of the plurality of guide rollers (62). A third motor (64) is fixedly installed at the end of the feeding cross frame (61) away from the material gathering frame (5). The drive end of the third motor (64) and the shaft end of the corresponding guide roller (62) are fixedly installed.

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