Preparation method of high-performance concrete

Abstract

The invention relates to a preparation method of high-performance concrete. The preparation method comprises the following steps: S1, acquiring a corresponding fiber material by a stirring center; s2, loosening and humidifying the fiber material to obtain a secondary fiber material; s3, the secondary fiber materials are put into a concrete base material, pre-stirring treatment is conducted, and a stirred base material is obtained; s4, mixing and stirring the stirred base materials to obtain the high-performance concrete. The stirring center is provided with a stirring pool and a pre-stirring pipeline. The conditions that in the related technology, fiber materials are not evenly distributed in the concrete base material and are prone to clustering and gathering, and after different types of fiber materials are mixed with the concrete base material, the combination degrees of the fiber materials and the concrete base material are different are improved.

Description

Technical Field

[0001] The invention relates to the technical field of concrete preparation, and in particular to a method for preparing high-performance concrete. Background Art

[0002] High-performance concrete has all the mechanical properties required for concrete structures and is characterized by high durability, high workability and high volume stability.

[0003] The existing fiber concrete preparation method generally first adds cementitious materials, coarse and fine aggregates, water and other materials into a mixer to stir to form a concrete mixture, then manually adds an appropriate amount of fiber, and then dry mixes, which takes a long time. In addition, since the fiber surface is in a dry state, the concrete substrate and the fiber cannot be fully bonded together, resulting in the tensile strength of the prepared fiber concrete failing to achieve the expected effect. In addition, the existing preparation method directly puts all the concrete substrate and fibers into a container for stirring during the feeding process, which easily leads to the concrete substrate and the fibers not being fully and evenly mixed, and the prepared fiber concrete is prone to cracks, which reduces the preparation quality of the fiber concrete.

[0004] Furthermore, in the related art, ideally, fiber mixing should be carried out by using a forced mixer and a wet mixing method, wherein wet mixing means mixing cement and sand first, and then adding fibers after slurry is produced. For manufacturers preparing high-performance concrete, they can only supply in the form of dry powder and fiber components. The above-mentioned wet mixing method has the defects of fiber clumping and uneven dispersion.

[0005] A Chinese invention patent with publication number CN116118005B discloses a method for preparing high-performance fiber concrete, which is completed by the cooperation of a support, a material control mechanism, a processing mechanism and a stirring mechanism. A mixing drum is fixedly connected to the upper end face of the support, and a stirring mechanism is installed inside the mixing drum. A material control mechanism is installed on the left part of the upper end face of the support and above the mixing drum through a left L-shaped frame. A plurality of pressing plates for cooperating with a pressing plate are evenly fixedly connected to the rear part of the outer wall of the rotating column in a circumferential direction. A tension spring is fixedly connected to the outside of the rotating shaft, and the end of the tension spring away from the rotating shaft is fixedly connected to the front end face of the U-shaped tube through a fixing plate.

[0006] The above-mentioned method for preparing high-performance fiber concrete proposes that when mixing in fiber materials, there is a defect that the concrete substrate and the fiber materials are difficult to fully bond due to the drying of the fiber materials, and then a method for pre-wetting the fiber materials is proposed to improve the adhesion between the concrete substrate and the fiber materials. In the actual preparation of high-performance concrete, the concrete base station is not limited to the preparation of fiber concrete, and there are cases where mixed fibers are used as fiber materials. Different types of fiber materials have different degrees of adhesion to the concrete substrate at the same wetness, and there are different degrees of bonding, which leads to the defects that the prepared concrete is difficult to meet high-performance requirements and the product is unstable. In addition, different types of fiber materials are prone to agglomeration after humidification, and the dispersion effect is poor, which also affects the performance of the concrete. Summary of the invention

[0007] In order to improve the situation in the related art that the fiber material is unevenly distributed in the concrete substrate and is easy to agglomerate, and after different types of fiber materials are mixed with the concrete substrate, the degree of bonding between the fiber material and the concrete substrate is different, the present application provides a method for preparing high-performance concrete, so that the fiber material is more evenly distributed in the concrete substrate, and is suitable for mixing different fiber materials with the concrete substrate.

[0008] The present application provides a method for preparing high performance concrete, which adopts the following technical solution: A method for preparing high-performance concrete, wherein the concrete mixing station comprises a material storage center, a material conveying channel and a mixing center, wherein the material conveying channel is connected to the material storage center and the mixing center respectively, and the preparation method comprises: Step S1, the mixing center obtains the corresponding fiber material according to the external input material preparation information, and the material preparation information includes the category information and the blending amount of the fiber material; Step S2, performing loosening and humidification treatment on the fiber material according to the material preparation information to obtain a secondary fiber material, wherein the loosening and humidification treatment includes increasing the dispersion of the fiber material and increasing the humidity of the fiber material; Step S3, respectively putting the secondary fiber materials into the corresponding concrete base material and pre-mixing them to obtain a mixed base material; Step S4, mixing and stirring the stirred substrates to obtain the high performance concrete; The mixing center is provided with a mixing tank and a premixing pipe connected to the mixing tank. Then, in the step S3, the secondary fiber material and the concrete base material are respectively input into the corresponding premixing pipe for premixing treatment to obtain the mixed base material; in the step S4, the mixed base material is transported to the mixing tank for mixing and stirring treatment.

[0009] Optionally, the premix pipe has a substrate inlet, a fiber inlet and a discharge port, the concrete substrate is transported to the premix pipe through the substrate inlet, the secondary fiber material is transported to the premix pipe through the fiber inlet, and the stirred substrate is transported to the mixing tank through the discharge port; A substrate inlet and a fiber inlet cooperate to mix the secondary fiber material and the concrete substrate and perform pre-mixing treatment.

[0010] Optionally, a material sorting device and a humidifying device are provided on the material conveying channel. Then, in the step S2, the material sorting device performs loosening treatment on the fiber material to obtain the fiber material with improved dispersion, and the humidifying device performs humidification treatment on the fiber material to obtain the fiber material with increased humidity value. The fiber material with improved dispersion and increased humidity value is output to the premixing pipeline as the secondary fiber material.

[0011] Optionally, the material sorting device includes a rake claw arranged above the conveying channel, a first driving member driving the rake claw to reciprocate, and a material blocking plate arranged on the surface of the conveying channel, the surface of the material blocking plate having a lower material gap for the rake claw to extend into, and the inner diameter of the lower material gap is adjustable, the first driving member controls the rake claw to extend into the lower material gap and reciprocate relative to the material blocking plate to screen the fiber material with improved dispersion, and the screened fiber material is transported to the corresponding premix pipe through the conveying channel.

[0012] Optionally, the humidifying device is installed on the surface of the material conveying channel and is located on the side of the rake claw close to the material storage center. The humidifying device includes a water supply pipeline, a nozzle arranged at the terminal of the water supply pipeline, and a controller. The nozzle is connected to the material conveying channel and is arranged toward the material blocking plate. The controller is used to control the opening and closing of the nozzle and the flow rate of the nozzle.

[0013] Optionally, the material sorting device further comprises a follower arm, one end of which is rotatably connected to the rake claw, and the other end of which is fixed to the output end of the first driving member.

[0014] Optionally, a first stirring roller is provided in the premix pipe, a blunt-edge stirring blade is provided on the side wall of the first stirring roller, a second driving member is provided on one side of the first stirring roller, and the second driving member controls the circumferential rotation of the stirring roller.

[0015] Optionally, the fiber material includes component fiber A and component fiber B, the component fiber A has a first ideal moisture value and a first ideal dispersion, the component fiber B has a second ideal moisture value and a second ideal dispersion, and the first ideal dispersion is greater than the second ideal dispersion. Then, the inner diameter of the lower material gap of the material blocking plate applied to the loosening treatment of the component fiber A is greater than the inner diameter of the lower material gap of the material blocking plate applied to the loosening treatment of the component fiber B.

[0016] Optionally, the mixing center is divided into a premixing zone and the mixing tank by a partition, the premixing pipe disk is arranged in the premixing zone, a second stirring roller and a third driving member for driving the second stirring roller to rotate circumferentially are arranged in the mixing tank, the partition is provided with a feeding port connecting the premixing zone and the mixing tank, the feeding port has an opening and closing device, and a receiving port is provided below the mixing tank for a concrete mixer truck to enter and receive the high-performance concrete.

[0017] By adopting the above technical solution, the fiber material is loosened and humidified before being mixed with the concrete substrate, so as to avoid the wet fiber material from agglomerating during the mixing process with the concrete substrate, and make the fiber material more evenly distributed in the concrete substrate. The loosening process is performed by the rake claw, and when the rake claw pulls out part of the fiber material, the humidification device sprays water on the fiber material, so that the wet fiber material is easier to adhere to the concrete substrate, so as to produce high-performance concrete with reliable quality.

[0018] Different types of fiber materials are pre-mixed and stirred with the concrete base material in their respective material channels, and then put into the mixing tank together for final mixing, which reduces the probability of agglomeration between different types of fiber materials, and converts different types of fiber materials into a concrete base material containing a single fiber material, which is mixed and stirred with each other, so that the fiber materials are more evenly distributed in the finished concrete. Within the limited mixing time, the bonding degree between the fiber material and the concrete base material is improved, and the fiber materials of different components are evenly distributed in the concrete base material, which improves the preparation efficiency of high-performance concrete and makes the product more stable and reliable when preparing high-performance concrete.

[0019] Users can also adjust the inner diameter of the lower material gap and assemble rake claws of corresponding sizes according to the type of fiber material and the fiber material distribution requirements of high-performance concrete to change the looseness of the fiber material, thereby controlling the content and distribution of the fiber material in the unit volume of concrete substrate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be discussed below. Obviously, the technical solutions described in conjunction with the drawings are only some embodiments of the present invention. For ordinary technicians in this field, other embodiments and their drawings can be obtained based on the embodiments shown in these drawings without paying creative work.

[0021] Figure 1 It is a flow chart of a method for preparing high performance concrete.

[0022] Figure 2 It is a structural diagram of a concrete mixing plant.

[0023] Figure 3 It is a structural diagram of the ready-mixed pipeline.

[0024] Figure 4 It is a cross-sectional view of the mixing center.

[0025] Figure 5 It is a cross-sectional view of the first mixing roller and the premix pipe.

[0026] Figure 6 Schematic diagram of the structure of the material handling device and the humidification device.

[0027] Figure 7 It is a structural schematic diagram of the material sorting device.

[0028] Figure 8 It is a structural schematic diagram of the humidifying device and the material blocking plate.

[0029] In the figure: 1. material storage center; 2. material conveying channel; 3. mixing center; 4. mixing tank; 5. premixing pipeline; 6. rake claw; 7. substrate inlet; 8. fiber inlet; 9. discharge port; 10. first driving member; 11. material blocking plate; 12. lower material gap; 13. nozzle; 14. through hole; 15. follower arm; 61. single claw; 62. positioning plate; 151. connecting rod; 152. follower rod; 16. ball head; 111. base; 112. cover plate; 17. waist-shaped hole; 18. first stirring roller; 19. blunt-edged stirring blade; 20. second driving member; 21. material storage bin; 22. premixing area; 23. second stirring roller; 24. feeding port; 25. receiving port. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions of various embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] The embodiment of the present invention provides a method for preparing high performance concrete, such as Figures 1 to 8 As shown, the concrete mixing station includes a material storage center 1, a material conveying channel 2 and a mixing center 3, and the material conveying channel 2 is connected to the material storage center 1 and the mixing center 3 respectively. The preparation method includes: Step S1, the mixing center 3 obtains the corresponding fiber material according to the external input material preparation information, and the material preparation information includes the category information and the blending amount of the fiber material; Step S2, performing loosening and humidification treatment on the fiber material according to the material preparation information to obtain a secondary fiber material, wherein the loosening and humidification treatment includes increasing the dispersion of the fiber material and increasing the humidity of the fiber material; Step S3, respectively adding the secondary fiber materials into the corresponding concrete base material and pre-mixing them to obtain a mixed base material; Step S4, mixing and stirring the stirred substrates to obtain high performance concrete; The mixing center 3 is provided with a mixing tank 4 and a premixing pipe 5 connected to the mixing tank 4. In step S3, the secondary fiber material and the concrete base material are respectively input into the corresponding premixing pipe 5 for premixing treatment to obtain a mixed base material; in step S4, the mixed base material is transported to the mixing tank 4 for mixing and stirring.

[0032] Specifically, in this embodiment, before the fiber material is mixed with the concrete base material, a loosening and humidification treatment is performed to avoid the wet fiber material from agglomerating during the mixing process with the concrete base material, so that the fiber material is more evenly distributed in the concrete base material.

[0033] In a preferred embodiment of the present invention, the premix pipe 5 has a substrate inlet 7, a fiber inlet 8 and a discharge port 9. The concrete substrate is transported to the premix pipe 5 through the substrate inlet 7, the secondary fiber material is transported to the premix pipe 5 through the fiber inlet 8, and the substrate after mixing is transported to the mixing tank 4 through the discharge port 9. A substrate inlet 7 and a fiber inlet 8 cooperate to mix the secondary fiber material and the concrete substrate and perform pre-mixing treatment.

[0034] Specifically, in this embodiment, a premix pipe 5 is provided before the mixing tank 4, so that the secondary fiber material can be uniformly mixed with a small amount of concrete base material in advance to obtain a mixed base material, and then each mixed base material is finally mixed in the mixing tank 4. During the final mixing, the flowing mixed base materials are mixed with each other, and the secondary fiber material is diffused in the mixing tank 4 with the concrete base material as the medium to be evenly distributed.

[0035] In a preferred embodiment of the present invention, a material sorting device and a humidifying device are provided on the feed channel 2. Then, in step S2, the material sorting device performs loosening treatment on the fiber material to obtain a fiber material with improved dispersion, and the humidifying device performs humidification treatment on the fiber material to obtain a fiber material with increased humidity value. The fiber material with improved dispersion and increased humidity value is output to the premixing pipeline 5 as secondary fiber material.

[0036] Specifically, in this embodiment, a conveyor belt is provided in the material conveying channel 2 , and the fiber material passes through the material sorting device and the humidifying device under the transmission of the conveyor belt, and then enters the premixing pipeline 5 .

[0037] The secondary fiber material and concrete in the ready-mixed pipe 5 are preliminarily mixed and transported to the next area through an oil pump.

[0038] In a preferred embodiment of the present invention, the material sorting device includes a rake claw 6 arranged above the conveying channel 2, a first driving member 10 for driving the rake claw 6 to reciprocate, and a material blocking plate 11 arranged on the surface of the conveying channel 2. The surface of the material blocking plate 11 has a lower material gap 12 for the rake claw 6 to extend into, and the inner diameter of the lower material gap 12 is adjustable. The first driving member 10 controls the rake claw 6 to extend into the lower material gap 12 and reciprocate relative to the material blocking plate 11 to screen and obtain fiber materials with improved dispersion. The screened fiber materials are transported to the corresponding premixed pipe 5 via the conveying channel 2.

[0039] Specifically, in this embodiment, the loosening process is performed by the rake claw 6. When the rake claw 6 pulls out part of the fiber material, the humidifying device sprays water to the fiber material, and the wet fiber material is easier to adhere to the concrete base material to produce high-performance concrete with reliable quality.

[0040] When the fiber material is conveyed by the conveyor belt to the upstream of the material blocking plate 11, it is blocked by the material blocking plate 11. At this time, the first driving member 10 controls the rake claw 6 to extend into the lower material gap 12, and pulls out part of the fiber material from the agglomerated fiber material to the downstream of the material blocking plate 11. The user can adjust the looseness of the fiber material by adjusting the frequency of the rake claw 6 pulling the material and the transmission speed of the conveyor belt.

[0041] In a preferred embodiment of the present invention, the humidifying device is installed on the surface of the material conveying channel 2 and is located on the side of the rake claw 6 close to the material storage center 1. The humidifying device includes a water supply pipeline, a nozzle 13 arranged at the terminal of the water supply pipeline, and a controller. The nozzle 13 is connected to the material conveying channel 2 and is arranged toward the material blocking plate 11. The controller is used to control the opening and closing of the nozzle 13 and the flow rate of the nozzle 13.

[0042] Specifically, in this embodiment, a through hole 14 is opened inside the nozzle 13, one end of the through hole 14 is connected to the feed channel 2 to spray water onto the fiber material, and the other end of the through hole 14 is connected to an external water supply pipeline. When the rake claw 6 pulls out the fiber material, the controller drives the nozzle 13 to spray water into the feed channel 2 to wet the fiber material.

[0043] In a preferred embodiment of the present invention, the material sorting device further comprises a follower arm 15 , one end of the follower arm 15 is rotatably connected to the rake claw 6 , and the other end of the follower arm 15 is fixed to the output end of the first driving member 10 .

[0044] Specifically, in this embodiment, the first driving member 10 uses an oil pump. The rake claw 6 includes a plurality of single claws 61 and a positioning plate 62. Each single claw 61 is fixed to one side of the positioning plate 62 by bolts in turn. The follower arm 15 includes a connecting rod 151 and a follower rod 152. The connecting rod 151 has a ball head 16. The ball head 16 is embedded in a side of the positioning plate 62 away from the single claw 61 and is rotatably connected to the positioning plate 62. One end of the follower rod 152 is rotatably connected to one end of the connecting rod 151 away from the positioning plate 62, and the other end of the follower rod 152 is rotatably connected to the output end of the first driving member 10.

[0045] The material blocking plate 11 includes a base 111 and a plurality of cover plates 112. The base 111 is fixed in the feed channel 2. A cavity for fiber materials to enter is provided on the side of the base 111 facing the upstream of the feed channel 2. The lower material gap 12 is provided on the side of the base 111 facing the downstream of the feed channel 2 and is connected to the cavity. The cover plate 112 is fixed to the side of the base 111 facing the rake claw 6 by bolts. A waist-shaped hole 17 extending in the horizontal direction is provided on the surface of the cover plate 112. Bolts fix the cover plate 112 to the base 111 through the waist-shaped hole 17. The user can move the cover plate 112 along the extension direction of the waist-shaped hole 17 according to actual production needs, and then adjust the area of ​​the lower material gap 12 covered by the cover plate 112, and assemble a single claw 61 whose size matches the lower material gap 12 after being covered. After the cover plate 112 covers the lower material gap 12, the width of the lower material gap 12 can be regarded as narrowing. If the transmission speed of the conveyor belt remains unchanged, the dispersion of the fiber material after loosening treatment will be greater.

[0046] In a preferred embodiment of the present invention, a first stirring roller 18 is provided in the premixed pipe 5, a blunt-edge stirring blade 19 is provided on the side wall of the first stirring roller 18, and a second driving member 20 is provided on one side of the first stirring roller 18, and the second driving member 20 controls the circumferential rotation of the first stirring roller 18.

[0047] Specifically, in this embodiment, the second driving member 20 is a hydraulic cylinder. The end of the blunt-edged stirring blade 19 away from the first stirring roller 18 is arc-shaped to reduce the probability of the fiber material being entangled with the edge of the blunt-edged stirring blade 19 during stirring.

[0048] In a preferred embodiment of the present invention, the fiber material includes component fiber A and component fiber B, component fiber A has a first ideal humidity value and a first ideal dispersion, component fiber B has a second ideal humidity value and a second ideal dispersion, the first ideal dispersion is greater than the second ideal dispersion, and the inner diameter of the lower material gap 12 of the material blocking plate 11 used for loosening component fiber A is greater than the inner diameter of the lower material gap 12 of the material blocking plate 11 used for loosening component fiber B.

[0049] Specifically, in this embodiment, high-performance concrete often contains two or more different types of fiber materials. The storage center 1 includes a plurality of storage bins 21. Different types of fiber materials are stored in respective storage bins 21. One storage bin 21 is equipped with a corresponding conveying channel 2. The component fibers A and B are respectively transported from their respective conveying channels 2 to the premix pipe 5, and are premixed with the concrete substrate to obtain corresponding mixed substrates. Subsequently, the mixed substrate with the component fibers A and the mixed substrate with the component fibers B are mixed and stirred. The component fibers A and B flow with the concrete substrate as the medium and are not easy to clump together.

[0050] In a preferred embodiment of the present invention, the mixing center 3 is divided into a premixing zone 22 and a mixing tank 4 by a partition, a premixing pipe 5 is arranged in the premixing zone 22, a second mixing roller 23 and a third driving member for driving the second mixing roller 23 to rotate circumferentially are arranged in the mixing tank 4, a feed port 24 connecting the premixing zone 22 and the mixing tank 4 is opened on the partition, the feed port 24 has an opening and closing device, and a receiving port 25 for a concrete mixer truck to enter and receive high-performance concrete is opened below the mixing tank 4.

[0051] Specifically, in this embodiment, the opening and closing device is a pneumatic valve, and the third driving member is a hydraulic cylinder.

[0052] When the concrete mixer truck enters the bottom of the mixing tank 4, the pneumatic valve is opened, the material receiving port 25 is discharged, and the high-performance concrete mixer truck receives the material.

[0053] In summary, different types of fiber materials are pre-mixed and stirred with the concrete base material in their respective material channels, and then put into the mixing tank 4 for final mixing, which reduces the probability of agglomeration between different types of fiber materials, and converts different types of fiber materials into a concrete base material containing a single fiber material, which is mixed and stirred with each other, so that the fiber materials are more evenly distributed in the finished concrete. Within the limited mixing time, the bonding degree between the fiber material and the concrete base material is improved, and the fiber materials of different components are evenly distributed in the concrete base material, which improves the preparation efficiency of high-performance concrete and makes the product more stable and reliable when preparing high-performance concrete.

[0054] The user can also adjust the inner diameter of the lower material gap 12 and assemble the rake claw 6 of corresponding size according to the type of fiber material and the fiber material distribution requirements of high-performance concrete to change the looseness of the fiber material, thereby controlling the content and distribution of the fiber material in the unit volume of the concrete base material.

Claims

1. A method for preparing high-performance concrete, wherein a concrete mixing station comprises a material storage center (1), a material conveying channel (2) and a mixing center (3), wherein the material conveying channel (2) is connected to the material storage center (1) and the mixing center (3), respectively, and wherein: The preparation method comprises: Step S1, the mixing center (3) obtains the corresponding fiber material according to the external input material preparation information, and the material preparation information includes the category information and the blending amount of the fiber material; Step S2, performing loosening and humidification treatment on the fiber material according to the material preparation information to obtain a secondary fiber material, wherein the loosening and humidification treatment includes increasing the dispersion of the fiber material and increasing the humidity of the fiber material; Step S3, respectively putting the secondary fiber materials into the corresponding concrete base material and pre-mixing them to obtain a mixed base material; Step S4, mixing and stirring the stirred substrates to obtain the high performance concrete; The mixing center (3) is provided with a mixing tank (4) and a premixing pipe (5) connected to the mixing tank (4). In the step S3, the secondary fiber material and the concrete base material are respectively input into the corresponding premixing pipe (5) for premixing to obtain the mixed base material; in the step S4, the mixed base material is transported to the mixing tank (4) for mixing and stirring.

2. The preparation method according to claim 1, characterized in that: The premix pipe (5) has a substrate inlet (7), a fiber inlet (8) and a discharge port (9); the concrete substrate is transported to the premix pipe (5) through the substrate inlet (7); the secondary fiber material is transported to the premix pipe (5) through the fiber inlet (8); and the stirred substrate is transported to the mixing tank (4) through the discharge port (9); A substrate inlet (7) and a fiber inlet (8) cooperate to mix the secondary fiber material and the concrete substrate and perform a pre-mixing process.

3. The preparation method according to claim 2, characterized in that: The conveying channel (2) is provided with a material sorting device and a humidifying device. Then, in the step S2, the material sorting device performs a loosening process on the fiber material to obtain the fiber material with improved dispersion, and the humidifying device performs a humidification process on the fiber material to obtain the fiber material with increased humidity value. The fiber material with improved dispersion and increased humidity value is output to the premixing pipeline (5) as the secondary fiber material.

4. The preparation method according to claim 3, characterized in that: The material sorting device comprises a rake claw (6) arranged above the conveying channel (2), a first driving member (10) for driving the rake claw (6) to reciprocate, and a material blocking plate (11) arranged on the surface of the conveying channel (2), the surface of the material blocking plate (11) having a lower material gap (12) for the rake claw (6) to extend into, the inner diameter of the lower material gap (12) being adjustable, the first driving member (10) controlling the rake claw (6) to extend into the lower material gap (12) and to reciprocate relative to the material blocking plate (11) to screen the fiber material with improved dispersion, and the screened fiber material is transported to the corresponding premixed pipe (5) via the conveying channel (2).

5. The preparation method according to claim 4, characterized in that: The humidifying device is installed on the surface of the material conveying channel (2) and is located on a side of the rake claw (6) close to the material storage center (1). The humidifying device comprises a water supply pipeline, a nozzle (13) arranged at the terminal of the water supply pipeline, and a controller. The nozzle (13) is connected to the material conveying channel (2) and is arranged toward the material blocking plate (11). The controller is used to control the opening and closing of the nozzle (13) and the flow rate of the nozzle (13).

6. The preparation method according to claim 5, characterized in that: The material sorting device further comprises a follower arm (15), one end of which is rotatably connected to the rake claw (6), and the other end of which is fixed to the output end of the first driving member (10).

7. The preparation method according to claim 6, characterized in that: A first stirring roller (18) is arranged in the premixed pipe (5), a blunt-edged stirring blade (19) is arranged on the side wall of the first stirring roller (18), a second driving member (20) is arranged on one side of the first stirring roller (18), and the second driving member (20) controls the circumferential rotation of the stirring roller.

8. The preparation method according to claim 7, characterized in that: The fiber material includes component fiber A and component fiber B, the component fiber A has a first ideal moisture value and a first ideal dispersion, the component fiber B has a second ideal moisture value and a second ideal dispersion, the first ideal dispersion is greater than the second ideal dispersion, and the inner diameter of the lower material gap (12) of the material blocking plate (11) applied to the loosening treatment of the component fiber A is greater than the inner diameter of the lower material gap (12) of the material blocking plate (11) applied to the loosening treatment of the component fiber B.

9. The preparation method according to claim 8, characterized in that: The mixing center (3) is divided into a premixing zone (22) and a mixing tank (4) by a partition, the premixing pipe (5) is arranged in the premixing zone (22), a second mixing roller (23) and a third driving member for driving the second mixing roller (23) to rotate in a circumferential direction are arranged in the mixing tank (4), the partition is provided with a feeding port (24) connecting the premixing zone (22) and the mixing tank (4), the feeding port (24) has an opening and closing device, and a receiving port (25) for a concrete mixer truck to enter and receive the high-performance concrete is provided below the mixing tank (4).

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