Mixing ratio experiment device and method of ultra-high performance concrete

Abstract

The application relates to the field of concrete mixing ratio experiments, in particular to a mixing ratio experiment device and method for ultra-high performance concrete, which comprises a round mold, a feeding cylinder, a limiting assembly, a baffle, a driving assembly, a mounting plate, a knocking hammer, a knocking assembly and a bottom plate. The limiting assembly is used for quickly locking the feeding cylinder and the round mold through cooperation of a pull rod, a spring, a rotating disc, a driving groove, a driving rod and a limiting block; the driving assembly is used for driving the baffle to be synchronously opened and closed through transmission of a knob, a first rotating rod, a cone wheel set and a threaded rod, so that mechanical scraping is realized; and the knocking assembly is used for realizing alternate knocking of the round mold through linkage of a rotating handle, a third rotating rod, a push block, a connecting rod and the knocking hammer. The application has the advantages of convenient assembly and disassembly, reliable sealing, accurate scraping, high efficiency and the like, effectively eliminates bubble interference and human errors, and improves the accuracy, reliability and operation efficiency of the slump experiment of the ultra-high performance concrete.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of concrete mix proportion experiment, and particularly relates to a mix proportion experiment device and method of ultra-high performance concrete. BACKGROUND

[0002] The mix proportion experiment device of ultra-high performance concrete is a special equipment for testing and evaluating the workability of ultra-high performance concrete, especially its slump and fluidity. In the process of mix proportion design and quality control of ultra-high performance concrete, the slump experiment is needed to intuitively and quickly judge the consistency, fluidity and plasticity of the mixture. The device usually includes a standard size round mold, a bottom plate for receiving the slump concrete and related auxiliary components. By filling the round mold with concrete, compacting it in a certain way and then lifting it vertically, the researcher can effectively evaluate whether the workability of the concrete under this mix proportion meets the construction requirements, thereby providing key basis for optimizing material proportioning and ensuring engineering quality.

[0003] However, the existing mix proportion experiment device of ultra-high performance concrete still has some obvious deficiencies in actual use. First, in the slump experiment, when filling the round mold with concrete, air bubbles are easily wrapped inside to form cavities. The existence of these air bubbles will cause the density of the concrete sample to be uneven, and after the round mold is lifted, the slump shape cannot truly reflect the actual fluidity of the concrete, thereby seriously affecting the accuracy and reliability of the experimental data. Second, in the experimental specification, it is required that the concrete must fill the inside of the round mold after compaction, and the excess concrete above the top surface needs to be scraped off to ensure the flatness of the top surface of the sample. At present, this scraping operation mainly depends on the manual scraping of the experimental personnel with a scraper, and the flatness completely depends on the experience and subjective judgment of the operator, lacking objective and unified mechanical standards. The flatness of such manual observation and operation cannot guarantee the consistency of experimental conditions each time, which may cause small differences in the height of the sample, and then introduce artificial errors to the final slump measurement results, affecting the comparability and accuracy of experimental data between different batches.

[0004] Therefore, it is necessary to provide a new mix proportion experiment device and method of ultra-high performance concrete to solve the above technical problems. SUMMARY

[0005] To solve the above technical problems, the present application provides a mix proportion experiment device and method of ultra-high performance concrete.

[0006] The application provides a mixing ratio experiment device and method for super high performance concrete, which comprises a round mold, a feeding cylinder is arranged at the top of the round mold, a limiting assembly is arranged at the bottom of the feeding cylinder, and the feeding cylinder is fixed to the round mold through the limiting assembly; a second sliding groove is symmetrically arranged in the feeding cylinder, a baffle is slidably connected in the second sliding groove, and the bottom surface of the baffle is in contact with the top surface of the round mold; a driving assembly is arranged in the feeding cylinder, and the driving assembly is used for driving the baffle to shield the top of the round mold; a mounting plate is fixedly connected to the bottom of the feeding cylinder, the mounting plate is designed in a U shape, and knocking hammers are slidably connected to the two ends of the mounting plate; and a knocking assembly is arranged in the mounting plate and used for driving the knocking hammers to knock the round mold.

[0007] Preferably, the limiting assembly comprises limiting blocks, four first sliding grooves are equidistantly arranged in the feeding cylinder, and the limiting blocks are slidably arranged in the first sliding grooves; four limiting grooves are equidistantly arranged on the outer wall of the top end of the round mold, and the limiting blocks are inserted into the limiting grooves; a rotating disc is rotatably connected to the feeding cylinder, four driving grooves are equidistantly arranged at the bottom of the rotating disc, and the driving grooves are designed in an arc shape; driving rods are fixedly connected to the top of each limiting block, and the top end of each driving rod is slidably arranged in the driving groove.

[0008] Preferably, a pushing groove is arranged on the outer wall of the bottom of the feeding cylinder, a pushing rod is slidably connected in the pushing groove, and one end of the pushing rod is fixedly connected to the rotating disc; a guide rod is fixedly connected to the inside of the pushing groove, the guide rod penetrates through the pushing rod and is slidably connected to the pushing rod; a spring is arranged on the outer wall of the guide rod, one end of the spring is fixedly connected to the side wall of the pushing groove, and the other end of the spring is fixedly connected to the side wall of the pushing rod. The sliding track of the pushing rod is in an arc shape, the guide rod limits the movement of the spring, and the spring is prevented from deviating from the elastic track when being pressed by the pushing rod.

[0009] Preferably, the driving assembly comprises a threaded rod, the threaded rod is rotatably arranged in the second sliding groove, one end of the threaded rod close to the baffle is threadedly connected to the baffle, and connecting plates are fixedly connected to the two sides of the feeding cylinder and slidably connected to the baffle; a first bevel gear is rotatably connected to the inside of one end of each connecting plate close to the threaded rod, and the first bevel gear is fixedly connected to the other end of the threaded rod away from the baffle.

[0010] Preferably, a first rotating rod is arranged at the other end of each connecting plate away from the threaded rod, the first rotating rod penetrates through the feeding cylinder and is rotatably connected to the feeding cylinder and the connecting plate; a second bevel gear is rotatably connected to the inside of the other end of each connecting plate away from the threaded rod, and the second bevel gear is fixedly arranged on the outer wall of the first rotating rod; one end of the first rotating rod extends out of the connecting plate and is fixedly connected to a knob.

[0011] Preferably, a second rotating rod is rotatably connected to the inside of each connecting plate, third bevel gears are fixedly connected to the two ends of the second rotating rod, and the two third bevel gears in the same connecting plate are respectively meshed with the first bevel gear and the second bevel gear.

[0012] Preferably, the knocking assembly comprises: a first connecting rod, a third sliding groove is formed in the interior of the mounting plate, and the third sliding groove is designed in a U shape; two first connecting rods are respectively arranged in the interiors of two ends of the third sliding groove in a sliding mode, and one end of the first connecting rod close to the knocking hammer is fixedly connected with the knocking hammer; a second connecting rod is slidably connected in the interior of the third sliding groove, and two ends of the second connecting rod are respectively fixedly connected with the two first connecting rods.

[0013] Preferably, the top end of the second connecting rod is fixedly connected with a push plate in a symmetrical mode, a third rotating rod is rotatably connected between the two push plates in the interior of the mounting plate, and a push block is fixedly connected to one end of the third rotating rod close to the push plate; one end of the third rotating rod away from the push block extends out of the mounting plate and is fixedly connected with a rotating handle.

[0014] Preferably, the bottom of the circular mold is provided with a bottom plate, the bottom plate is circular, and a scale is marked on the upper surface of the bottom plate; the outer wall of the top end of the feeding cylinder is fixedly connected with a handle in a symmetrical mode.

[0015] A mixing ratio experiment method of ultra-high performance concrete comprises the following steps:

[0016] S1. First, the feeding cylinder is fixed with the circular mold by using the limiting assembly, and then the bottom of the fixed circular mold is placed above the bottom plate;

[0017] S2. Second, the knob is rotated to open the baffle by the driving assembly, and then the mixed ultra-high performance concrete is poured from the top of the feeding cylinder;

[0018] S3. Next, the rotating handle drives the knocking hammer to knock the circular mold by the knocking assembly, so that the ultra-high performance concrete fills the circular mold;

[0019] S4. Then, the baffle is closed by the driving assembly to isolate the communication between the circular mold and the feeding cylinder;

[0020] S5. Finally, the device is vertically lifted within two to six seconds by the handle, the flow of the ultra-high performance concrete is observed, and the slump of the ultra-high performance concrete is determined.

[0021] Compared with the related art, the mixing ratio experiment device and method of ultra-high performance concrete provided by the application have the following beneficial effects:

[0022] 1. Rapid assembly and disassembly and reliable sealing are realized, and the experiment efficiency and consistency are improved

[0023] This invention achieves rapid locking and separation between the feed cylinder and the circular mold through a limiting assembly consisting of a lever, spring, turntable, drive groove, drive rod, and limiting block. The operator can automatically complete the precise insertion and locking of the limiting block and limiting groove under the drive of the spring's restoring force through simple levering and releasing actions. This design not only facilitates assembly and disassembly, saving experimental preparation time, but more importantly, it ensures consistent robustness and sealing in each installation, preventing slurry leakage or mold misalignment caused by loose connections. It provides uniform initial conditions for all experimental batches, guaranteeing the comparability and repeatability of experimental data.

[0024] 2. Ensure synchronized opening and closing of the baffles and leveling control to achieve precise mechanical leveling.

[0025] This invention utilizes a drive assembly consisting of a knob, a first rotating rod, a second conical wheel, a third conical wheel, a second rotating rod, the first conical wheel, and a threaded rod to precisely control the synchronous, opposite-facing or opposite-facing movement of two baffles. This transmission mechanism ensures that the two baffles always move synchronously, allowing for a tight seal at the top of the circular mold. During the closing process, the bottom surface of the baffle is in close contact with the top surface of the circular mold, acting as a precise "scraper" to completely remove excess concrete protruding above the top surface of the mold in one go. This mechanical leveling operation completely replaces traditional manual leveling, thoroughly eliminating flatness errors caused by differences in operator technique and experience, ensuring absolute consistency in the height and flatness of the concrete top surface in each experiment, and greatly improving the accuracy of the experiment.

[0026] 3. Provides efficient compaction and bubble elimination, ensuring uniformity within the sample and accurate data.

[0027] The present invention designs a striking assembly consisting of a handle, a third rotating rod, a push block, a push plate, a second connecting rod, a first connecting rod, and striking hammers. This assembly drives two striking hammers to continuously and uniformly alternately strike the sidewall of a circular mold. This high-frequency mechanical vibration can be effectively transmitted to the interior of the concrete, promoting further compaction of the mixture and successfully expelling air bubbles trapped during the filling process. By eliminating air bubble cavities, the uniformity of the concrete sample is ensured, allowing the flow behavior of the concrete during subsequent slump tests to accurately reflect its workability under its mix proportions, thereby significantly improving the accuracy and reliability of the slump test results.

[0028] 4. Integrating a graduated base plate and standardized procedures optimizes the ease of observation, judgment, and operation.

[0029] The application integrates the circular base plate marked with scales in the device, after the vertical mold is lifted, the collapsed concrete is naturally spread on the base plate, and the final spreading diameter can be directly compared with the base plate scales quickly. This provides an objective and quantitative observation basis for the experimenters to more accurately judge the fluidity of the concrete. In summary, the application integrates multiple experimental steps such as limiting, feeding, scraping, compacting, testing and the like in one device, and realizes the standardization and simplification of operation through optimized mechanical linkage. The whole experimental process is coherent and efficient, which not only reduces the dependence on the skills of the operators, but also greatly improves the overall efficiency and scientificity of the super high performance concrete mix proportion experiment. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 The structural schematic diagram of the super high performance concrete mix proportion experiment device and method provided by the application is shown in the figure.

[0031] Figure 2 The cross-sectional structural schematic diagram of the connecting plate is shown in the figure. Figure 1

[0032] Figure 3 The structural schematic diagram of part A is shown in the figure. Figure 2

[0033] Figure 4 The structural schematic diagram of part B is shown in the figure. Figure 2

[0034] Figure 5 The cross-sectional structural schematic diagram of the mounting plate is shown in the figure. Figure 1

[0035] Figure 6 The structural schematic diagram of the second connecting rod is shown in the figure. Figure 5

[0036] Figure 7 The structural schematic diagram of the third rotating rod is shown in the figure. Figure 6

[0037] Figure 8 The cross-sectional structural schematic diagram of the feeding cylinder is shown in the figure. Figure 1

[0038] Figure 9 The structural schematic diagram of the rotating disc is shown in the figure. Figure 8

[0039] ​​​​​​​​Labels in the diagram: 1. Circular mold; 2. Feed cylinder; 3. Second slide groove; 4. Baffle; 5. Mounting plate; 6. Hammer; 7. Limiting block; 8. First slide groove; 9. Limiting groove; 10. Turntable; 11. Drive groove; 12. Drive rod; 13. Dial groove; 14. Dial rod; 15. Guide rod; 16. Spring; 17. Threaded rod; 18. Connecting plate; 19. First conical wheel; 20. First rotating rod; 21. Second conical wheel; 22. Knob; 23. Second rotating rod; 24. Third conical wheel; 25. Push plate; 26. Third rotating rod; 27. Push block; 28. Rotary handle; 29. ​​Base plate; 30. Handle; 31. First connecting rod; 32. Third slide groove; 33. Second connecting rod. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for explaining the invention and are not intended to limit the invention.

[0041] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0042] like Figures 1 to 9 As shown, a mix proportioning test device for ultra-high performance concrete includes: a circular mold 1, a feeding cylinder 2 at the top of the circular mold 1, a limiting component installed at the bottom of the feeding cylinder 2, and the feeding cylinder 2 being fixed to the circular mold 1 by the limiting component; a second sliding groove 3 symmetrically opened inside the feeding cylinder 2, a baffle 4 slidably connected inside the second sliding groove 3, the bottom surface of the baffle 4 contacting the top surface of the circular mold 1; a driving component installed inside the feeding cylinder 2, used to drive the baffle 4 to block the top of the circular mold 1; a mounting plate 5 fixedly connected to the bottom of the feeding cylinder 2, the mounting plate 5 having a U-shaped design, and a striking hammer 6 slidably connected to both ends of the mounting plate 5; a striking component installed inside the mounting plate 5, used to drive the striking hammer 6 to strike the circular mold 1. A base plate 29 is provided at the bottom of the circular mold 1, the base plate 29 being circular, and the upper surface of the base plate 29 being marked with graduations; handles 30 are symmetrically fixedly connected to the outer wall of the top of the feeding cylinder 2.

[0043] During the experiment, the circular mold 1 is placed on the bottom plate 29 marked with a scale, and the scale of the bottom plate 29 is used to preliminarily observe the paving range of the concrete. The concrete mixture is poured from the feeding cylinder 2. When it is necessary to test the slump, the entire device is lifted vertically upward, the circular mold 1 is lifted, and the internal concrete is naturally paved on the bottom plate 29 under the action of gravity. By comparing the final paving range of the concrete with the scale on the bottom plate 29, the observation and judgment of the slump can be assisted. The baffle 4 is opened during loading and closed before lifting the mold to isolate the feeding cylinder 2 and the circular mold 1. The knocking hammer 6 is driven by the knocking assembly to knock the side wall of the circular mold 1, and the concrete is densely filled in the circular mold 1 through vibration to eliminate internal bubbles and ensure the accuracy of the experimental results.

[0044] As shown in Figure 8 and Figure 9 , the limiting assembly includes: a limiting block 7, four first sliding grooves 8 are equidistantly arranged in the interior of the feeding cylinder 2, and the limiting block 7 is slidingly arranged in the interior of the first sliding groove 8; four limiting grooves 9 are equidistantly arranged on the top end outer wall of the circular mold 1, and the limiting block 7 is inserted into the limiting groove 9; a rotating disc 10 is rotatably connected to the interior of the feeding cylinder 2, four driving grooves 11 are equidistantly arranged on the bottom of the rotating disc 10, and the driving grooves 11 are designed in an arc shape; the top of the limiting block 7 is fixedly connected with a driving rod 12, and the top end of the driving rod 12 is slidingly arranged in the interior of the driving groove 11. A pushing groove 13 is arranged on the outer wall of the bottom of the feeding cylinder 2, a pushing rod 14 is slidingly connected in the pushing groove 13, and one end of the pushing rod 14 is fixedly connected with the rotating disc 10; a guide rod 15 is fixedly connected in the interior of the pushing groove 13, the guide rod 15 penetrates through the pushing rod 14 and is slidingly connected with the pushing rod 14; a spring 16 is sleeved on the outer wall of the guide rod 15, one end of the spring 16 is fixedly connected with the side wall of the pushing groove 13, and the other end of the spring 16 is fixedly connected with the side wall of the pushing rod 14; the sliding track of the pushing rod 14 is in an arc shape, the guide rod 15 limits the movement of the spring 16, and the spring 16 is prevented from deviating from the elastic track when being pressed by the pushing rod 14.

[0045] Locking Process: When installation is required, the user moves the lever 14 along the slot 13. The lever 14 compresses the spring 16 and drives the turntable 10 to rotate inside the feed cylinder 2. The arc-shaped drive groove 11 at the bottom of the turntable 10 rotates accordingly, and the inclined surface of the drive groove 11 pushes the drive rod 12 sliding within it to move radially. Since the first slide groove 8 restricts the rotation of the limiting block 7, allowing it to slide horizontally only, the drive rod 12, which is fixedly connected to the limiting block 7, can only drive the limiting block 7 to slide inward along the first slide groove 8, so that the limiting block 7 is completely retracted into the feed cylinder 2. At this time, the feed cylinder 2 is placed on the circular mold 1, and the limiting block 7 is aligned with the approximate position of the limiting groove 9 on the circular mold 1. Then, the user releases the lever 14, which is compressed and releases its elastic potential energy, pushing the lever 14 to reset. The lever 14 then drives the turntable 10 to rotate in the opposite direction. The drive groove 11 on the turntable 10 pushes the drive rod 12 again, which in turn drives the limit block 7 to slide horizontally outward along the first slide groove 8, and finally reliably inserts into the limit groove 9 of the circular mold 1, thereby completing the locking.

[0046] Unlocking process: When disassembly is required, simply move lever 14 again and repeat the above action of retracting limit block 7 to release the lock and remove feed cylinder 2 from round mold 1.

[0047] like Figures 2 to 4 As shown, the drive assembly includes: a threaded rod 17, which is rotatably disposed inside the second slide groove 3, with one end of the threaded rod 17 near the baffle 4 threadedly connected to the baffle 4; connecting plates 18 are fixedly connected to both sides of the feed cylinder 2, and the connecting plates 18 are slidably connected to the baffle 4; a first conical wheel 19 is rotatably connected inside the connecting plate 18 near the threaded rod 17, and the first conical wheel 19 is fixedly connected to the end of the threaded rod 17 away from the baffle 4. A first rotating rod 20 is provided at the end of the connecting plate 18 away from the threaded rod 17, and the first rotating rod 20 passes through the feed cylinder 2 and is rotatably connected to the feed cylinder 2 and the connecting plate 18; a second conical wheel 21 is rotatably connected inside the end of the connecting plate 18 away from the threaded rod 17, and the second conical wheel 21 is fixedly disposed on the outer wall of the first rotating rod 20; a knob 22 is fixedly connected to one end of the first rotating rod 20 extending out of the connecting plate 18. The connecting plate 18 is rotatably connected to a second rotating rod 23, and both ends of the second rotating rod 23 are fixedly connected to a third conical wheel 24; the two third conical wheels 24 in the same connecting plate 18 are respectively engaged with the first conical wheel 19 and the second conical wheel 21.

[0048] This component is used to synchronously control the opening and closing of the two baffles 4 to achieve a seal on the top of the circular mold 1. When it is necessary to open the baffles 4, the user rotates the knob 22, which drives the first rotating rod 20 to rotate. The two second conical wheels 21 on the first rotating rod 20 rotate synchronously. Each second conical wheel 21 drives a third conical wheel 24 that meshes with it, and the third conical wheel 24 drives the second rotating rod 23 to rotate. The third conical wheel 24 at the other end of the second rotating rod 23 drives the first conical wheel 19 that meshes with it to rotate. The first conical wheel 19 then drives the threaded rod 17 to rotate. Since the baffles 4 and the threaded rod 17 are threadedly connected, and the movement of the baffles 4 is restricted by the second sliding groove 3, it can only translate and cannot rotate. Therefore, the rotational movement of the threaded rod 17 is converted into the linear movement of the baffles 4 along the second sliding groove 3, so that the two baffles 4 move synchronously in opposite directions, opening the top of the circular mold 1. Rotating the knob 22 in the opposite direction will drive the two baffles 4 to move synchronously towards each other, closing and sealing the top of the circular mold 1.

[0049] like Figures 5 to 7 As shown, the striking assembly includes: a first connecting rod 31; a third sliding groove 32 with a U-shaped design is provided inside the mounting plate 5; two first connecting rods 31 are slidably disposed inside the two ends of the third sliding groove 32, with the end of the first connecting rod 31 near the striking hammer 6 fixedly connected to the striking hammer 6; a second connecting rod 33 is slidably connected inside the third sliding groove 32, with both ends of the second connecting rod 33 fixedly connected to the two first connecting rods 31 respectively. Push plates 25 are symmetrically fixedly connected to the top of the second connecting rod 33; a third rotating rod 26 is rotatably connected inside the mounting plate 5 between the two push plates 25; a push block 27 is fixedly connected to the end of the third rotating rod 26 near the push plate 25; and a handle 28 is fixedly connected to the end of the third rotating rod 26 away from the push block 27 extending out of the mounting plate 5.

[0050] This component drives two hammers 6 to alternately strike the circular mold 1, causing it to vibrate. The user reciprocates by rotating the handle 28, which drives the third rotating rod 26 to rotate, causing the push block 27, fixed to one end of the third rotating rod 26, to move in a circular motion. When the push block 27 rotates to contact one side of the push plate 25, it pushes that side push plate 25 and the second connecting rod 33 fixed to it to slide within the third sliding groove 32. The second connecting rod 33 drives the two first connecting rods 31 at both ends to move synchronously, thereby driving the two hammers 6 to move in the same direction, with one hammer 6 striking one side of the circular mold 1. As the push block 27 continues to rotate away from the push plate 25 and then contacts the other side push plate 25, it pushes the hammer 6 to strike in the opposite direction. This cycle repeats, and by continuously rotating the handle 28, the two hammers 6 can continuously and alternately strike the circular mold 1, eliminating air bubbles within the mold 1 through vibration and ensuring the concrete is fully compacted.

[0051] A method for mix proportioning experiments of ultra-high performance concrete includes the following steps:

[0052] S1. First, use the limiting component to fix the feed cylinder 2 and the round mold 1, and then place the bottom of the fixed round mold 1 above the base plate 29.

[0053] S2. Next, rotate knob 22 to open baffle 4 through drive assembly, and then pour the prepared ultra-high performance concrete from the top of feed cylinder 2.

[0054] S3. Next, rotating the handle 28 drives the hammer 6 to strike the circular mold 1 through the striking component, so that the ultra-high performance concrete fills the circular mold 1.

[0055] S4. Then, the baffle 4 is closed by using the drive component to isolate the connection between the circular mold 1 and the feed cylinder 2.

[0056] S5. Finally, by vertically lifting the device with handle 30 within two to six seconds, observe the flow of the ultra-high performance concrete and determine its slump.

[0057] The working principle of this invention is as follows:

[0058] 1. Preparation and Installation Phase

[0059] First, assemble the device. The user moves the lever 14 on the feed cylinder 2, which compresses the spring 16 and rotates the turntable 10. The arc-shaped drive groove 11 at the bottom of the turntable 10 pushes the drive rod 12, causing the limiting block 7 to retract inward along the first sliding groove 8. Next, the feed cylinder 2 is placed on the circular mold 1, and the limiting block 7 is roughly aligned with the limiting groove 9 at the top of the circular mold 1. After releasing the lever 14, the restoring force of the spring 16 pushes the lever 14 and the turntable 10 back to their original positions. The drive groove 11 then pushes the drive rod 12 in the opposite direction, pushing the limiting block 7 horizontally out and inserting it into the limiting groove 9 of the circular mold 1, achieving a quick and reliable locking between the feed cylinder 2 and the circular mold 1. Finally, place the assembled device on the base plate 29 marked with graduations.

[0060] 2. Concrete loading and compaction stage

[0061] After the device is fixed, the user rotates knob 22. Knob 22 drives the first rotating rod 20 and its second conical wheel 21 to rotate. The second conical wheel 21 drives the third conical wheel 24 meshing with it, which in turn drives the second rotating rod 23 to rotate. The third conical wheel 24 at the other end of the second rotating rod 23 drives the first conical wheel 19 to rotate, and the first conical wheel 19 finally drives the threaded rod 17 to rotate. Since the baffle 4 is threadedly connected to the threaded rod 17 and its movement is restricted by the connecting plate 18, the rotational movement of the threaded rod 17 is converted into the synchronous back-to-back movement of the two baffles 4 in the second slide groove 3, thereby opening the top entrance of the circular mold 1. At this time, the pre-mixed ultra-high performance concrete mixture is poured in from the top of the feed cylinder 2.

[0062] Subsequently, a compaction process is performed. The user rotates the handle 28 back and forth, causing the third rotating rod 26 and its end pusher 27 to move in a circular motion. When the pusher 27 rotates to contact one side of the pusher plate 25, it pushes the pusher plate 25, the second connecting rod 33, and the first connecting rods 31 at both ends to move synchronously, driving the two hammers 6 to move in the same direction, causing one of the hammers 6 to strike one side of the circular mold 1. As the pusher 27 continues to rotate and contacts the other side of the pusher plate 25, the hammer 6 moves in the opposite direction and strikes the other side of the circular mold 1. By continuously rotating the handle 28, the two hammers 6 produce continuous and uniform alternating blows to the circular mold 1. This vibration effectively eliminates air bubbles inside the ultra-high performance concrete, promoting full compaction within the circular mold 1, ensuring the uniformity of the sample, and laying the foundation for accurate slump testing in the future.

[0063] 3. Slump test phase

[0064] After the compaction process is completed, the knob 22 is rotated in the opposite direction. Through the transmission of the drive component, the two baffles 4 move synchronously towards each other, completely closing and sealing the top of the circular mold 1, isolating it from the feed cylinder 2. Subsequently, within 2 to 6 seconds, the entire device is lifted vertically and smoothly upwards. After the circular mold 1 is lifted, the ultra-high performance concrete inside it naturally collapses and spreads onto the base plate 29 under gravity. By observing the final spreading diameter and shape of the concrete on the base plate 29 and making a quantitative comparison with the pre-marked scale on the base plate 29, the experimenters can accurately determine the slump and flow properties of the ultra-high performance concrete under this mix proportion.

[0065] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A mixing ratio experiment device of ultra-high performance concrete, characterized by, The utility model relates to a circular mould and feeding cylinder device, and belongs to the field of mould and feeding cylinder device. The utility model discloses a circular mould (1), the top of circular mould (1) is equipped with feeding cylinder (2), the bottom of feeding cylinder (2) is installed with limiting assembly, and feeding cylinder (2) is fixed with circular mould (1) through limiting assembly; The limiting assembly includes: limiting block (7), four first sliding grooves (8) that are evenly distributed in circumferentially are formed in the inner wall of feeding cylinder (2), four limiting grooves (9) that correspond to the first sliding grooves (8) are formed in the top outer wall of circular mould (1), one end of limiting block (7) is slidably arranged in the first sliding groove (8), and the other end of limiting block (7) is inserted into the corresponding limiting groove (9); The inside of feeding cylinder (2) is symmetrically provided with a second sliding groove (3), a baffle (4) is slidably connected in the second sliding groove (3), and the bottom surface of baffle (4) is in contact with the top surface of circular mould (1); The bottom of feeding cylinder (2) is fixedly connected with a mounting plate (5), the mounting plate (5) is designed in a U shape, and the two ends of the mounting plate (5) are slidably connected with knocking hammers (6); The inside of feeding cylinder (2) is installed with a driving assembly, the driving assembly is used for driving baffle (4) to shield the top of circular mould (1); The driving assembly includes: a threaded rod (17), the threaded rod (17) is rotatably arranged in the second sliding groove (3), and one end of the threaded rod (17) close to baffle (4) is threadedly connected with baffle (4); The bottom of feeding cylinder (2) is fixedly connected with a mounting plate (5), the mounting plate (5) is designed in a U shape, and the two ends of the mounting plate (5) are slidably connected with knocking hammers (6); The inside of the mounting plate (5) is provided with a knocking assembly for driving the knocking hammer (6) to knock the round mold (1); the knocking assembly comprises: a first connecting rod (31), a third sliding groove (32) is formed in the inside of the mounting plate (5) and is designed in a U shape; the two first connecting rods (31) are respectively and slidably arranged in the inside of the two ends of the third sliding groove (32), and one end of the first connecting rod (31) close to the knocking hammer (6) is fixedly connected with the knocking hammer (6); a second connecting rod (33) is slidably connected in the inside of the third sliding groove (32), and the two ends of the second connecting rod (33) are fixedly connected with the two first connecting rods (31); the top end of the second connecting rod (33) is fixedly connected with a push plate (25) in a symmetrical mode, a third rotating rod (26) is rotatably connected in the inside of the mounting plate (5) between the two push plates (25), and one end of the third rotating rod (26) close to the push plate (25) is fixedly connected with a push block (27); one end of the third rotating rod (26) away from the push block (27) extends out of the mounting plate (5) and is fixedly connected with a rotating handle (28).

2. The mixing ratio experiment device of the ultra-high performance concrete according to claim 1, wherein, The two sides of the feeding cylinder (2) are fixedly connected with connecting plates (18), and the connecting plates (18) are slidably connected with the baffle (4); the inside of one end of the connecting plate (18) close to the threaded rod (17) is rotatably connected with a first bevel gear (19), and the first bevel gear (19) is fixedly connected with one end of the threaded rod (17) away from the baffle (4).

3. The mixing ratio experiment device for ultra high performance concrete according to claim 2, wherein One end of the connecting plate (18) away from the threaded rod (17) is provided with a first rotating rod (20), the first rotating rod (20) penetrates through the feeding cylinder (2) and is rotatably connected with the feeding cylinder (2) and the connecting plate (18); the inside of one end of the connecting plate (18) away from the threaded rod (17) is rotatably connected with a second bevel gear (21), and the second bevel gear (21) is fixedly arranged on the outer wall of the first rotating rod (20); one end of the first rotating rod (20) extends out of the connecting plate (18) and is fixedly connected with a knob (22).

4. The mixing ratio experiment device for ultra high performance concrete according to claim 3, wherein The inside of the connecting plate (18) is rotatably connected with a second rotating rod (23), and the two ends of the second rotating rod (23) are fixedly connected with third bevel gears (24); the two third bevel gears (24) in the same connecting plate (18) are respectively meshed with the first bevel gear (19) and the second bevel gear (21).

5. The mixing ratio experiment device for ultra high performance concrete according to claim 1, wherein The bottom of the round mold (1) is provided with a bottom plate (29), the bottom plate (29) is circular, and the upper surface of the bottom plate (29) is marked with a scale; the outer wall of the top end of the feeding cylinder (2) is fixedly connected with handles (30) in a symmetrical mode.

6. A method of experimentally mixing a super high performance concrete using the super high performance concrete mixing experiment device according to claim 5, characterized by, The method comprises the following steps: S1, first, the feeding cylinder (2) and the round mold (1) are fixed by using the limiting assembly, and then the fixed round mold (1) is placed above the bottom plate (29); S2, second, the baffle (4) is opened by using the driving assembly, and then the prepared ultra-high performance concrete is poured from the top of the feeding cylinder (2); S3, then, the knocking hammer (6) is driven by the knocking assembly to knock the round mold (1), so that the ultra-high performance concrete fills the round mold (1); S4, then, the baffle (4) is closed by using the driving assembly, so as to isolate the communication between the round mold (1) and the feeding cylinder (2); S5. Finally, by vertically lifting the device with the handle (30) within two to six seconds, observe the flow of the ultra-high performance concrete and determine the slump of the ultra-high performance concrete.

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