Asphalt concrete material shear strength testing device

Abstract

The invention relates to the technical field of water conservancy projects, in particular to an asphalt concrete material shear strength testing device. Comprising a test box, the inner walls of the two sides of the test box are slidably connected with sliding blocks, the interiors of the sliding blocks are rotatably connected with bidirectional lead screws, one ends of the bidirectional lead screws are fixedly connected with rockers, the two sides of the bidirectional lead screws are in threaded connection with threaded blocks, the interiors of the threaded blocks are fixedly connected with connecting rods, and the outer walls of the connecting rods are rotatably connected with first rotating plates; a first rotating shaft is fixedly connected into the first rotating plate, and a pressure applying assembly is arranged on the lower surface of the supporting plate. According to the asphalt concrete material shear strength testing device provided by the invention, different extrusion heights between the pressure applying assembly and the test piece are adjusted to test the performance of the test piece under different stress conditions, and the ultimate shear force performance test of continuous extrusion until the test piece is fractured is realized; the pressure applying assembly is ensured to accurately apply different shear forces to different test pieces, test errors caused by inaccurate pressure applying positions are reduced, and the precision of test results is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hydraulic engineering, and particularly relates to a shearing strength test device for asphalt concrete material. BACKGROUND

[0002] Hydraulic engineering refers to an engineering activity for controlling, regulating and utilizing water resources to meet the water demand of human beings, and the asphalt concrete is asphalt mixture prepared by asphalt, fine aggregate and filler in a certain proportion at high temperature. The shearing performance test device for asphalt concrete material is a device for evaluating the shearing strength and shearing modulus of the asphalt concrete under different stress conditions. In the construction process, the shearing performance of the asphalt concrete directly affects the construction quality. In order to ensure the stability and safety of the structures such as dam, waterway and dam in long-term use, a shearing strength test device for asphalt concrete material is used.

[0003] The prior art has the following technical problems: when the shearing performance of the asphalt concrete material is tested, the single rough adjustment of the test mode may not ensure that the pressure assembly accurately applies the shearing force to the predetermined position of the test piece, which may cause uneven distribution of the shearing force and affect the accuracy of the test result. Therefore, a shearing strength test device for asphalt concrete material is designed to provide another technical solution for the above technical problems. SUMMARY

[0004] Therefore, it is necessary to provide a shearing strength test device for asphalt concrete material to solve the technical problem that when the shearing performance of the asphalt concrete material is tested, the single rough adjustment of the test mode may not ensure that the pressure assembly accurately applies the shearing force to the predetermined position of the test piece, which may cause uneven distribution of the shearing force and affect the accuracy of the test result.

[0005] In order to solve the above technical problems, the present application adopts the following technical solutions:

[0006] The utility model provides an asphalt concrete material shearing strength test device, including the test box, the inside wall of both sides of test box is connected with the sliding block, the inside rotation of sliding block is connected with two -way screw rod, one end of two -way screw rod is fixedly connected with rocker, the both sides of two -way screw rod are connected with screw block, the inside fixed connection of screw block has the connecting rod, the rotation of outer wall of connecting rod is connected with first rotary plate, the inside fixed connection of first rotary plate has first rotation axis, the rotation of outer wall of connecting rod is connected with second rotary plate, the inside fixed connection of second rotary plate has second rotation axis, the rotation of outer wall of second rotation axis is connected with fixed seat, the lower surface fixed connection of fixed seat has support plate, the inside of support plate is connected in test box, the both sides fixed connection of support plate has the limiting block, the inside wall of limiting block is connected in the both sides of test box, the bottom of test box is equipped with the object groove, the lower surface of support plate is provided with pressure assembly, the inside of test box is provided with drive assembly.

[0007] As a preferred embodiment of the asphalt concrete material shearing strength test device provided by the utility model, the drive assembly includes an electric push rod, the outer wall of the electric push rod is fixedly connected to the inside of the test box, the output end of the electric push rod is fixedly connected with a push plate, the outer wall of the push plate is slidingly connected to the inside of the test box, the both sides of the push plate are fixedly connected with connecting blocks, the outer wall of the connecting blocks is slidingly connected to the both sides of the inner wall of the test box, the lower surface of the push plate is fixedly connected with a connecting seat, the both ends of the first rotation axis are rotatably connected to the inside of the connecting seat, and the inside of the test box is fixedly connected with a baffle.

[0008] As a preferred embodiment of the asphalt concrete material shearing strength test device provided by the utility model, the pressure assembly includes a pressure block, the upper surface of the pressure block is fixedly connected to the lower surface of the support plate, the lower surface of the pressure block is provided with a pressure sensor, and one end of the connecting rod is fixedly connected with a telescopic block.

[0009] As a preferred embodiment of the asphalt concrete material shearing strength test device provided by the utility model, the outer wall of the telescopic block is slidingly connected with a support block, the outer wall of the support block is slidingly connected to the bottom of the test box, and a plurality of clamping grooves are symmetrically formed in the inside of the support block.

[0010] As a preferred embodiment of the asphalt concrete material shearing strength test device provided by the utility model, the both sides of the telescopic block are slidingly connected with balls, the outer wall of the balls abuts against the inner wall of the clamping groove, and the outer wall of the balls is fixedly connected with a push piece.

[0011] In a preferred embodiment of the asphalt concrete material shear strength testing device provided by the present invention, the outer wall of the pusher is slidably connected to the inner wall of the telescopic block, and a first spring is fixedly connected to the outer wall of the pusher, the outer wall of the first spring being fixedly connected to the inside of the telescopic block.

[0012] In a preferred embodiment of the asphalt concrete shear strength testing device provided by the present invention, a sliding plate is fixedly connected to the outer wall of the support block, the outer wall of the sliding plate is slidably connected to the inner wall of the storage groove, a sliding column is slidably connected to the inside of the sliding plate, a clamping plate is fixedly connected to the end of the sliding column away from the sliding plate, and the lower surface of the clamping plate is slidably connected to the inner wall of the storage groove.

[0013] In a preferred embodiment of the asphalt concrete shear strength testing device provided by the present invention, a second spring is slidably connected to the outer wall of the sliding column. One end of the second spring is fixedly connected to the outer wall of the sliding plate, and the other end of the second spring is fixedly connected to the outer wall of the clamping plate. The specimen is attached to the outer wall of the clamping plate, and the lower surface of the specimen is placed on the inner wall of the placement groove.

[0014] It is clear without a doubt that the technical solution described above in this application can solve the technical problem that this application aims to address.

[0015] Meanwhile, through the above technical solutions, the present invention has at least the following beneficial effects:

[0016] This invention provides an asphalt concrete shear strength testing device that combines coarse and precise adjustments. First, the pressure application component is moved to its approximate position, and then precisely adjusted. Different compression heights between the pressure application component and the specimen are adjusted to test the specimen's performance under different stress conditions, as well as the ultimate shear force performance test under continuous compression until the specimen fractures. This ensures that the pressure application component can accurately apply different shear forces to different specimens, reducing testing errors caused by inaccurate pressure application positions and improving the accuracy of test results.

[0017] During the precise adjustment of the pressure application components, this invention also drives the telescopic block, support block, and sliding plate to slide synchronously through the sliding of the connecting rod. The sliding plate drives the clamping plate to slide through the connection of the sliding column. The specimen can be pre-limited and fixed by the clamping plate, and then the position of the specimen is further clamped and fixed by the sliding of the sliding plate to prevent the specimen from shifting or sliding during the test, thus ensuring the stability of the test process. At the same time, the second spring can protect the specimen through its buffering protection function. By adjusting synchronously through the same power source, the actual relative motion conditions can be better simulated, thereby improving the accuracy of the test.

[0018] In this invention, the telescopic block slides inside the support block as the connecting rod slides up and down. This telescopic design allows the telescopic block to better adapt to the position of the connecting rod, and the adjustment of the position of the connecting rod will not affect the adjustment of the position of the sliding plate and the clamping plate, thereby further improving the accuracy and stability of fixing the specimen. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a partial structural diagram of the push plate of the present invention;

[0022] Figure 3 This is a schematic diagram of the internal structure of the test chamber of the present invention;

[0023] Figure 4 This is a partial structural diagram of the pressing block of the present invention;

[0024] Figure 5 This is a partial structural diagram of the sliding plate of the present invention;

[0025] Figure 6 for Figure 5 Enlarged view of point A in the middle;

[0026] Figure 7 This is a schematic diagram of the internal structure of the support block of the present invention;

[0027] Figure 8 This is a schematic diagram of the internal structure of the telescopic block of the present invention.

[0028] In the diagram: 1. Test chamber; 2. Slider; 3. Bidirectional lead screw; 4. Rocker arm; 5. Threaded block; 6. Connecting rod; 7. First rotating plate; 8. First rotating shaft; 9. Second rotating plate; 10. Second rotating shaft; 11. Fixed seat; 12. Support plate; 13. Limiting block; 14. Pressure block; 15. Pressure sensor; 16. Drive assembly; 17. Electric push rod; 18. Push plate; 19. Connecting block; 20. Connecting seat; 21. Baffle; 22. Telescopic block; 23. Support block; 24. Slot; 25. Ball bearing; 26. Push plate; 27. First spring; 28. Sliding plate; 29. ​​Sliding column; 30. Clamping plate; 31. Second spring; 32. Specimen; 33. Storage slot; 34. Pressure application assembly. Detailed Implementation

[0029] 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 illustrative and not intended to limit the invention.

[0030] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0031] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0032] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0033] Reference Figures 1-8 A shear strength testing device for asphalt concrete includes a test chamber 1. Sliding blocks 2 are slidably connected to the inner walls of both sides of the test chamber 1. A bidirectional lead screw 3 is rotatably connected inside the sliding blocks 2. A rocker arm 4 is fixedly connected to one end of the bidirectional lead screw 3, which fixes the rocker arm 4. Threaded blocks 5 are threadedly connected to both sides of the bidirectional lead screw 3. A connecting rod 6 is fixedly connected inside the threaded blocks 5, which also fixes the connecting rod 6. A first rotating plate 7 is rotatably connected to the outer wall of the connecting rod 6. A first rotating shaft 8 is fixedly connected inside the first rotating plate 7. A second rotating plate is rotatably connected to the outer wall of the connecting rod 6. 9. A second rotating shaft 10 is fixedly connected inside the second rotating plate 9. A fixed seat 11 is rotatably connected to the outer wall of the second rotating shaft 10. A support plate 12 is fixedly connected to the lower surface of the fixed seat 11. The support plate 12 fixes the fixed seat 11. The outer wall of the support plate 12 is slidably connected to the inside of the test chamber 1. Limiting blocks 13 are fixedly connected to both sides of the support plate 12. The outer walls of the limiting blocks 13 are slidably connected to the inner walls of both sides of the test chamber 1. A storage groove 33 is opened at the bottom of the test chamber 1. A pressure application component 34 is provided on the lower surface of the support plate 12. A drive component 16 is provided inside the test chamber 1.

[0034] The usage process of the asphalt concrete material shear strength testing device provided by this invention is as follows:

[0035] The crack resistance of asphalt concrete is crucial for the long-term operation of hydraulic engineering projects. Accurate assessment of the shear strength and shear modulus of asphalt concrete ensures the stability and safety of these structures during long-term use. Before testing, a specimen 32 made of asphalt concrete is placed in the storage trough 33 for simple positioning. When precise adjustment of the position of the pressure application component 34 is required, the rocker arm 4 is rotated, causing the bidirectional lead screw 3 to rotate inside the slider 2. The rotation of the bidirectional lead screw 3 causes the threaded blocks 5 and connecting rods 6 on both sides to slide synchronously. The sliding of the threaded blocks 5 and connecting rods 6 allows the first rotating plate 7 and the second rotating plate 9 on both sides to rotate synchronously. The rotation of the first rotating plate 7 and the second rotating plate 9 pushes the slider 2 on the outer wall of the bidirectional lead screw 3 to slide on the inner wall of the test chamber 1. The second rotating shaft 10 connects the second rotating plate 9 and the fixed seat 11. The fixed base 11, through the rotation of the second rotating shaft 10, drives the support plate 12 and the limiting block 13 to slide synchronously. The limiting block 13 slides on the inner wall of the test chamber 1, supporting and limiting the sliding of the support plate 12, preventing deviation during adjustment. Thus, the height of the pressure component 34 can be precisely adjusted by adjusting the height of the support plate 12. When the pressure component 34 contacts the specimen 32, the force on the specimen 32 can be tested. The different positions between the pressure component 34 and the specimen 32 are converted into different levels of pressure on the specimen 32, which facilitates the testing of the performance of the specimen 32 under different pressure levels and the ultimate shear force. Through the combination of coarse adjustment and precise adjustment, it is ensured that the pressure block 14 can accurately apply different shear forces to different specimens 32, reducing test errors caused by inaccurate pressure position and improving the accuracy of test results.

[0036] Reference Figures 1-3 The drive assembly 16 includes an electric push rod 17. The outer wall of the electric push rod 17 is fixedly connected to the inside of the test chamber 1, and the test chamber 1 provides support and fixation for the electric push rod 17. The output end of the electric push rod 17 is fixedly connected to a push plate 18. The outer wall of the push plate 18 is slidably connected to the inside of the test chamber 1. Connecting blocks 19 are fixedly connected to both sides of the push plate 18. The outer walls of the connecting blocks 19 are slidably connected to the inner walls of both sides of the test chamber 1. The connecting blocks 19 slide on the inner walls of the test chamber 1 and provide support and limit for the sliding of the push plate 18. A connecting seat 20 is fixedly connected to the lower surface of the push plate 18, and the push plate 18 provides fixation for the connecting seat 20. The two ends of the first rotating shaft 8 are rotatably connected to the inside of the connecting seat 20. A baffle 21 is fixedly connected to the inside of the test chamber 1, and the test chamber 1 provides fixation for the baffle 21.

[0037] The usage process of the asphalt concrete material shear strength testing device provided by this invention is as follows:

[0038] When it is necessary to roughly adjust the height of the pressure block 14 and the pressure sensor 15, the electric push rod 17 is activated to drive the push plate 18 and the connecting block 19 to slide simultaneously. When the push plate 18 slides, it will drive the connecting seat 20 and the first rotating shaft 8 below to slide. In turn, through the connection of a series of structures, the pressure block 14 and the pressure sensor 15 are adjusted to the approximate position. The sliding position of the push plate 18 can be restricted by the baffles 21 on both sides, so that it can only be adjusted downward to the position of the baffle 21.

[0039] Reference Figure 3 and Figure 4 The pressure application component 34 includes a pressure block 14, the upper surface of which is fixedly connected to the lower surface of the support plate 12. A pressure sensor 15 is provided on the lower surface of the pressure block 14, and a telescopic block 22 is fixedly connected to one end of the connecting rod 6.

[0040] The usage process of the asphalt concrete material shear strength testing device provided by this invention is as follows:

[0041] The pressure block 14 slides synchronously with the support plate 12. By adjusting the height of the pressure block 14, shear forces of different heights can be applied to the specimen 32, and specimens 32 of different sizes can be used. A pressure sensor 15 is set below the pressure block 14. The pressure sensor 15 is directly connected to the external control system and can directly measure the force applied to the specimen 32 and feed the force back to the control system in real time. The applied force is accurately recorded, which is convenient for more accurate calculation of parameters such as shear strength and shear modulus. At the same time, by continuously applying pressure, it is also convenient to measure the pressure that the specimen 32 is subjected to at the moment of crushing and to determine the ultimate shear force of the specimen 32.

[0042] Reference Figure 5 , Figure 7 and Figure 8 The outer wall of the telescopic block 22 is slidably connected to a support block 23, and the outer wall of the support block 23 is slidably connected to the bottom of the test chamber 1. Multiple slots 24 are symmetrically opened on both sides of the inside of the support block 23. Ball bearings 25 are slidably connected to both sides of the telescopic block 22. The outer wall of the ball bearings 25 abuts against the inner wall of the slot 24. A push plate 26 is fixedly connected to the outer wall of the ball bearings 25. The outer wall of the push plate 26 is slidably connected to the inner wall of the telescopic block 22. A first spring 27 is fixedly connected to the outer wall of the push plate 26. The outer wall of the first spring 27 is fixedly connected to the inside of the telescopic block 22.

[0043] The usage process of the asphalt concrete material shear strength testing device provided by this invention is as follows:

[0044] The telescopic block 22 and the support block 23 are designed to extend or retract. This telescopic design allows the telescopic block 22 to adjust synchronously with the up, down, left, and right sliding of the connecting rod 6. The change in the height of the connecting rod 6 will not affect the adjustment of the position between the clamping plates 30. When the connecting rod 6 slides upward, it will drive the telescopic block 22 to slide upward inside the support block 23. The bottom of the support block 23 is provided with a limit plate to limit the position of the support block 23 inside the test chamber 1, so that it can only slide left and right, and will not slide synchronously with the upward sliding of the telescopic block 22. This further improves the accuracy of the position adjustment process of the clamping plate 30. When the telescopic block 22 slides up and down with the connecting rod 6, the tension or pressure of the connecting rod 6 can squeeze the ball bearings 25 on both sides. When the ball bearings 25 are under pressure, they will push the push plate 26 to slide synchronously inside the telescopic block 22 and squeeze the first spring 27 during the sliding process. The sliding of the ball bearings 25 in different directions facilitates the adjustment of the position between the telescopic block 22 and the support block 23.

[0045] Reference Figure 5 and Figure 6 A sliding plate 28 is fixedly connected to the outer wall of the support block 23, and the support block 23 fixes the sliding plate 28. The outer wall of the sliding plate 28 is slidably connected to the inner wall of the storage groove 33. A sliding column 29 is slidably connected inside the sliding plate 28. A clamping plate 30 is fixedly connected to the end of the sliding column 29 away from the sliding plate 28. The sliding column 29 connects the clamping plate 30 and the sliding plate 28. The lower surface of the clamping plate 30 is slidably connected to the inner wall of the storage groove 33. A second spring 31 is slidably connected to the outer wall of the sliding column 29. One end of the second spring 31 is fixedly connected to the outer wall of the sliding plate 28, and the other end of the second spring 31 is fixedly connected to the outer wall of the clamping plate 30. The specimen 32 is attached to the outer wall of the clamping plate 30, and the lower surface of the specimen 32 is placed on the inner wall of the storage groove 33.

[0046] The usage process of the asphalt concrete material shear strength testing device provided by this invention is as follows:

[0047] The specimen 32 is placed between the clamping plates 30. When the clamping plates 30 contact the specimen 32, they push the sliding column 29 to slide inside the sliding plate 28. When the support block 23 slides inside the test chamber 1, it also drives the sliding plate 28 to slide synchronously against the inner wall of the storage slot 33. During the sliding process, the sliding plate 28 drives the clamping plate 30 to slide synchronously through the connecting action of the sliding column 29. At the same time, the second spring 31 is set between the clamping plate 30 and the sliding plate 28. The second spring 31 is compressed due to the sliding of the clamping plate 30. During this process, the second spring 31 can not only ensure the clamping plate 30 is squeezed, but also ensure the clamping plate 30 is squeezed. The clamping plate 30 applies uniform pressure when clamping the specimen 32, reducing deformation or damage to the specimen 32 caused by uneven clamping force, improving the accuracy of test results, and can also adapt to specimens 32 of different sizes. The clamping plate 30 can further improve the fixing effect on the specimen 32 by fine adjustment. When the position of the pressure block 14 and the pressure sensor 15 is precisely adjusted, the position of the sliding plate 28 will be finely adjusted. However, the second spring 31 can still limit and fix the specimen 32 by the clamping plate 30, and the movement of the sliding plate 28 will not affect the fixing of the specimen 32.

[0048] In this embodiment, each structure has its own service life. In actual manufacturing and application, the corresponding structure made of different materials can be replaced according to the needs of use.

[0049] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A shear strength testing device for asphalt concrete materials, comprising a test chamber (1), characterized in that, The test chamber (1) has sliders (2) slidably connected to the inner walls on both sides. A double-acting lead screw (3) is rotatably connected inside the slider (2). A rocker arm (4) is fixedly connected to one end of the double-acting lead screw (3). Threaded blocks (5) are threaded to both sides of the double-acting lead screw (3). A connecting rod (6) is fixedly connected inside the threaded blocks (5). A first rotating plate (7) is rotatably connected to the outer wall of the connecting rod (6). A first rotating shaft (8) is fixedly connected inside the first rotating plate (7). A second rotating plate (9) is rotatably connected to the outer wall of the connecting rod (6). A second rotating shaft is fixedly connected inside the second rotating plate (9). (10), the outer wall of the second rotating shaft (10) is rotatably connected to a fixed seat (11), the lower surface of the fixed seat (11) is fixedly connected to a support plate (12), the outer wall of the support plate (12) is slidably connected to the inside of the test chamber (1), the two sides of the support plate (12) are fixedly connected to limit blocks (13), the outer wall of the limit blocks (13) is slidably connected to the inner walls of the two sides of the test chamber (1), the bottom of the test chamber (1) is provided with a storage groove (33), the lower surface of the support plate (12) is provided with a pressure application component (34), and the inside of the test chamber (1) is provided with a drive component (16).

2. The asphalt concrete material shear strength testing device according to claim 1, characterized in that, The drive assembly (16) includes an electric push rod (17), the outer wall of which is fixedly connected to the inside of the test chamber (1), the output end of which is fixedly connected to a push plate (18), the outer wall of which is slidably connected to the inside of the test chamber (1), the two sides of which are fixedly connected to connecting blocks (19), the outer walls of which are slidably connected to the inner walls of the two sides of the test chamber (1), the lower surface of which is fixedly connected to a connecting seat (20), the two ends of the first rotating shaft (8) are rotatably connected to the inside of the connecting seat (20), and the inside of the test chamber (1) is fixedly connected to a baffle (21).

3. The asphalt concrete material shear strength testing device according to claim 1, characterized in that, The pressure application component (34) includes a pressure block (14), the upper surface of which is fixedly connected to the lower surface of the support plate (12), a pressure sensor (15) is provided on the lower surface of the pressure block (14), and a telescopic block (22) is fixedly connected to one end of the connecting rod (6).

4. The asphalt concrete material shear strength testing device according to claim 3, characterized in that, The outer wall of the telescopic block (22) is slidably connected to a support block (23), and the outer wall of the support block (23) is slidably connected to the bottom of the test chamber (1). Multiple slots (24) are symmetrically opened on both sides of the inside of the support block (23).

5. The asphalt concrete material shear strength testing device according to claim 4, characterized in that, The telescopic block (22) has ball bearings (25) slidably connected to both sides. The outer wall of the ball bearings (25) abuts against the inner wall of the slot (24). The outer wall of the ball bearings (25) is fixedly connected to a pusher plate (26).

6. The asphalt concrete material shear strength testing device according to claim 5, characterized in that, The outer wall of the push plate (26) is slidably connected to the inner wall of the telescopic block (22), and the outer wall of the push plate (26) is fixedly connected to a first spring (27), the outer wall of the first spring (27) being fixedly connected to the inside of the telescopic block (22).

7. The asphalt concrete material shear strength testing device according to claim 4, characterized in that, The outer wall of the support block (23) is fixedly connected to a sliding plate (28), the outer wall of the sliding plate (28) is slidably connected to the inner wall of the storage groove (33), the inner wall of the sliding plate (28) is slidably connected to a sliding column (29), the end of the sliding column (29) away from the sliding plate (28) is fixedly connected to a clamping plate (30), and the lower surface of the clamping plate (30) is slidably connected to the inner wall of the storage groove (33).

8. The asphalt concrete material shear strength testing device according to claim 7, characterized in that, The outer wall of the sliding column (29) is slidably connected to a second spring (31). One end of the second spring (31) is fixedly connected to the outer wall of the sliding plate (28), and the other end of the second spring (31) is fixedly connected to the outer wall of the clamping plate (30). The outer wall of the clamping plate (30) is attached to a specimen (32), and the lower surface of the specimen (32) is placed on the inner wall of the storage groove (33).

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