Highway pavement material wear resistance detection device

Abstract

This utility model relates to the technical field of road engineering testing equipment, and discloses a device for testing the wear resistance of highway pavement materials. It includes a testing platform, a first frame fixed to the upper part of the testing platform, a rodless cylinder fixed to the side wall of the first frame, a moving block fixed to the output end of the rodless cylinder, a rolling mechanism located at the lower end of the moving block for rolling the upper surface of a second concrete test block, a pressing mechanism and a friction mechanism located on the upper part of the testing platform, a reduction motor located at the center of the upper part of the testing platform, a turntable fixed to the upper end of the output shaft of the reduction motor, a first limiting mechanism and a second limiting mechanism located on the upper end of the turntable, and a liquid delivery mechanism fixed to the upper part of the testing platform for inputting acid or alkali solution to the upper end of the turntable. This utility model has the advantage of being able to simulate the coupling effect of multiple wear mechanisms and chemical corrosion environments.

Description

Technical Field

[0001] This utility model relates to the technical field of road engineering testing equipment, specifically to a device for testing the wear resistance of highway pavement materials. Background Technology

[0002] Highway pavement materials must withstand the combined effects of vehicle loads, friction, and environmental corrosion over long periods of time in actual use. Their wear resistance directly affects the service life of the pavement and driving safety. Therefore, accurate and reliable testing of their wear resistance is necessary during the material research and development and engineering acceptance stages.

[0003] Currently, most common wear resistance testing methods simulate single working conditions, such as reciprocating friction on a stationary specimen using a friction wheel, or conducting wear tests on a specimen along a fixed path using a rotary wear tester. However, these methods often only simulate friction in a single direction and cannot comprehensively reflect the complex stress state that materials experience under real high-speed driving conditions, such as the simultaneous rolling, sliding, pressure, and corrosive effects of the environmental medium. In addition, most existing testing equipment has limited functionality and cannot perform multi-factor coupled wear resistance tests on the same device, resulting in low testing efficiency, cumbersome operation, and an inability to comprehensively evaluate the overall wear resistance performance of materials under actual use conditions.

[0004] Therefore, there is an urgent need for a testing device that can simulate multiple wear mechanisms and integrate the effects of chemical corrosion environment, so as to more realistically and efficiently evaluate the wear resistance of highway pavement materials and provide a reliable basis for material optimization and engineering selection. Utility Model Content

[0005] The purpose of this invention is to provide a device for testing the wear resistance of highway pavement materials, which can solve the problems existing in the prior art by simulating the coupling effect of multiple wear mechanisms and chemical corrosion environment.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A device for testing the wear resistance of highway pavement materials includes a testing platform, a first frame fixed to the upper part of the testing platform, a rodless cylinder fixed to the side wall of the first frame, a moving block fixed to the output end of the rodless cylinder, a rolling mechanism set at the lower end of the moving block for rolling the upper surface of a second concrete test block, a pressing mechanism and a friction mechanism set at the upper part of the testing platform, a geared motor set at the center of the upper part of the testing platform, a turntable fixed to the upper end of the output shaft of the geared motor, a first limiting mechanism and a second limiting mechanism set at the upper end of the turntable, and a liquid conveying mechanism fixed to the upper part of the testing platform for inputting acid or alkali solution to the upper end of the turntable. The height of the first limiting mechanism is higher than the height of the first concrete test block; The first concrete test block is placed on the upper end of the turntable and is limited by the first limiting mechanism. The second concrete test block is placed inside the second limiting mechanism, and the lower end of the rolling mechanism is in contact with the upper end of the second concrete test block.

[0007] Preferably, the rolling mechanism includes a U-shaped block fixed to the lower end of the moving block and small tires rotatably mounted on the inner walls of both sides of the U-shaped block, with the lower end of the small tires in contact with the upper end of the second concrete test block.

[0008] It is worth noting that the rolling mechanism simulates the rolling friction of real vehicle tires on the road surface by using small tires. Combined with the horizontal movement driven by rodless cylinders, it achieves smooth and continuous rolling load application, thereby more accurately evaluating the wear resistance of materials under dynamic rolling. This mechanism can simulate the contact state between tires and the road surface during high-speed driving, providing uniform and repeatable wear tests, making up for the shortcomings of traditional static friction tests.

[0009] Preferably, the friction mechanism includes a second frame fixed to the upper end of the testing platform, a first electric cylinder fixed inside the second frame, a lifting block fixed to the lower end of the output shaft of the first electric cylinder, and a friction block fixed to the side wall of the lifting block, with the lower end of the friction block and the upper end of the first concrete test block in contact.

[0010] It is worth noting that the friction mechanism precisely controls the downward pressure and contact time of the friction block through the first electric cylinder to simulate sliding friction and achieve adjustable sliding wear testing of materials. This mechanism can simulate the sliding friction generated when a vehicle brakes or turns, comprehensively evaluate the wear resistance of materials under different sliding conditions, improve the precision and flexibility of the test, and enable the device to reproduce the wear mechanism in complex driving environments. This allows for a more comprehensive analysis of material performance, provides a scientific basis for the design and selection of road materials, and enhances the practicality and applicability of the device.

[0011] Preferably, the pressing mechanism includes a fixed box fixed to the upper end of the testing platform, a bearing block fixed to one end of the fixed box near the turntable, and a second electric cylinder fixed to the upper end of the bearing block. The output shaft of the second electric cylinder passes through the bearing block and extends to the lower part of the bearing block. When the output shaft of the second electric cylinder moves downward, it can contact the upper surface of the first concrete test block.

[0012] It is worth noting that the pressing mechanism can simulate the intermittent pressure of vehicle load on the road surface through the dynamic pressing of the output shaft of the second electric cylinder, thereby testing the wear resistance and deformation resistance of the material under impact load. This mechanism can reproduce the periodic pressure of heavy vehicles on the road surface in traffic, and can realize pressing at different frequencies and amplitudes through programmable control, thus enhancing the comprehensiveness of the test.

[0013] Preferably, the first limiting mechanism includes an inner ring fixed to the upper end of the turntable, a groove extending through the side wall of the inner ring, an outer ring fixed to the upper end of the turntable, and a plurality of limiting blocks fixed to the upper end of the turntable; two sides of the first concrete test block are attached to the ends of the two limiting blocks that are close to each other, and the other two sides of the first concrete test block are attached to the ends of the inner ring and the outer ring that are close to each other, respectively, and the height of the outer ring is higher than the height of the first concrete test block.

[0014] It is worth noting that the first limiting mechanism, through the coordinated action of the inner ring, outer ring and limiting block, firmly fixes multiple first concrete test blocks, preventing them from shifting or tipping over when the turntable rotates, thus ensuring the stability and safety of the testing process. The mechanism adopts a ring layout, which can accommodate multiple test blocks for batch testing at the same time, significantly improving the testing efficiency. The outer ring is higher than the test block, making it easier to observe the condition of the test block and for the infusion mechanism to add corrosive liquid.

[0015] Preferably, the second limiting mechanism includes a central platform fixed to the center of the upper end of the turntable and a limiting frame fixed to the upper end of the central platform, and the second concrete test block is placed in the limiting frame.

[0016] It is worth noting that the second limiting mechanism is specifically used to fix the second concrete test block through the central platform and the limiting frame, so that it remains in a stable position under the action of the rolling mechanism. At the same time, it allows the test block to move slightly within the limiting frame, simulating the stress state of real road materials under constrained conditions. This mechanism allows for quick and easy installation and replacement of test blocks, improving the repeatability and convenience of the test.

[0017] Preferably, the infusion mechanism includes a liquid tank fixed to the upper end of the testing platform, a water pump, and a third frame. The upper end of the third frame is fixed with an outlet pipe, the output end of which faces the annular area formed by the inner and outer rings. The pumping end of the water pump is connected to the outlet end of the liquid tank through a pipe, and the outlet end of the water pump is connected to the inlet end of the outlet pipe through a pipe.

[0018] It is worth noting that the infusion mechanism controls the delivery of acid or alkali solutions through a water pump, simulating the impact of environmental corrosion on road materials and realizing the coupled testing of chemical corrosion and wear. This mechanism can uniformly spray or soak test blocks to reproduce the effects of corrosive media such as rainwater and de-icing agents, thereby assessing the durability of materials in harsh environments. The integrated chemical environment simulation makes the test more comprehensive and realistic, solving the problem that traditional equipment cannot simulate the coupling of multiple factors.

[0019] Preferably, a waste liquid discharge mechanism is provided at the lower end of the turntable. The waste liquid discharge mechanism includes a waste liquid discharge pipe that is fixedly connected to the lower end of the turntable and a valve body provided on the waste liquid discharge pipe.

[0020] It is worth noting that the waste liquid discharge mechanism effectively collects and discharges waste liquid generated during the testing process through waste liquid discharge pipes and valves. This keeps the testing platform clean, prevents liquid from corroding equipment or interfering with test results. The mechanism is simple and practical in design, controlling the timing and flow rate of discharge through the valve, making it flexible in operation and easy to maintain. Its advantages include improved device lifespan and safety, ensuring the stability of the testing environment, and avoiding secondary pollution or experimental errors caused by waste liquid accumulation.

[0021] Preferably, the inner and outer rings are concentrically positioned at the top of the turntable.

[0022] It is worth noting that the inner and outer rings are concentrically set at the top of the turntable, which can ensure that the multiple first concrete test blocks maintain a uniform radial distribution during the rotation of the turntable, and avoid the inconsistent force between each test block and the friction mechanism and the pressing mechanism due to eccentricity, thereby significantly improving the repeatability and comparability of the test results.

[0023] Preferably, the pressing mechanism and the friction mechanism are arranged at intervals along the circumference of the turntable and are located above the rotation path of the first concrete test block.

[0024] It is worth noting that the pressing mechanism and the friction mechanism are arranged at intervals along the circumference of the turntable and are located above the rotation path of the first concrete specimen, realizing a composite test of applying intermittent impact pressure and sliding friction, two different mechanical wear mechanisms, to the specimen on the same turntable.

[0025] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model uses a turntable driven by a geared motor, on which multiple first concrete test blocks are arranged in a ring, and a second concrete test block is placed at the center. When the turntable rotates, the test blocks pass under a fixed pressing mechanism and a friction mechanism in sequence, receiving intermittent pressure and sliding friction. The second test block at the center is subjected to rolling friction by a rolling mechanism (small tire) driven by a rodless cylinder. This design realizes the automatic, continuous and compound application of multiple mechanical wear mechanisms such as rolling, sliding and pressure on the same device, which efficiently simulates the complex stress state of road materials under actual driving conditions and solves the problems of single function and low testing efficiency of traditional equipment. 2. By adding a liquid delivery mechanism, including a liquid tank, a water pump, and a liquid outlet pipe facing the test block area, this utility model can quantitatively spray acid or alkali solution onto the surface of the first concrete test block on the turntable during the wear resistance test. This allows the material to be subjected to the corrosive effect of chemical media while undergoing mechanical wear, thereby realizing the coupled accelerated test of two aging factors: mechanical wear and chemical corrosion. This solution effectively solves the problem that existing equipment is difficult to simulate the corrosive effect of environmental media, making the wear resistance performance evaluation more comprehensive and realistic. 3. By integrating the above-mentioned multifunctional testing mechanism and setting up a waste liquid discharge mechanism (waste liquid discharge pipe and valve body), this utility model can obtain the comprehensive durability data of materials under the coupling effect of multiple factors in a single experiment. The device has a high degree of automation, and a single clamping can complete the continuous testing of batch test blocks and the simulation of corrosion environment. It is also easy to clean and maintain, which significantly improves the standardization and efficiency of testing. Attached Figure Description

[0026] Figure 1 The diagram shown is a three-dimensional structural schematic of this utility model; Figure 2 The diagram shown is a three-dimensional structural schematic of the pressing mechanism of this utility model; Figure 3 The diagram shown is a three-dimensional structural schematic of the turntable of this utility model; Figure 4 The diagram shown is a three-dimensional structural schematic of the first limiting mechanism of this utility model. Figure 5 The diagram shown is a three-dimensional structural schematic of the friction mechanism of this utility model; Figure 6 The diagram shown is a three-dimensional structural schematic of the first limiting mechanism and the infusion mechanism of this utility model. Figure 7 This utility model is shown. Figure 6 A magnified three-dimensional structural diagram of part A in the diagram.

[0027] Reference numerals: 1. Testing platform; 2. First frame; 3. Rodless cylinder; 4. Moving block; 5. U-shaped block; 6. Small tire; 7. Second frame; 8. First electric cylinder; 9. Lifting block; 10. Friction block; 11. Fixed box; 12. Bearing block; 13. Second electric cylinder; 14. Gear motor; 15. Turntable; 16. Inner ring; 17. Tank; 18. Outer ring; 19. Limiting block; 20. First concrete test block; 21. Liquid tank; 22. Water pump; 23. Third frame; 24. Liquid outlet pipe; 25. Central platform; 26. Limiting frame; 27. Second concrete test block; 151. Waste liquid discharge pipe; 152. Valve body. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] To address the shortcomings of existing technologies, such as limited functionality, inability to simulate multi-factor coupling effects, low detection efficiency, and incomplete evaluation, the following technical solution is proposed. Please refer to [link / reference needed]. Figures 1-7 ; Example 1: A device for testing the wear resistance of highway pavement materials, comprising a testing platform 1, a first frame 2 fixed to the upper end of the testing platform 1, a rodless cylinder 3 fixed to the side wall of the first frame 2, a moving block 4 fixed to the output end of the rodless cylinder 3, a rolling mechanism disposed at the lower end of the moving block 4 for rolling the upper surface of a second concrete test block 27, a pressing mechanism and a friction mechanism disposed at the upper end of the testing platform 1, a reduction motor 14 disposed at the center of the upper end of the testing platform 1, a turntable 15 fixed to the upper end of the output shaft of the reduction motor 14, a first limiting mechanism and a second limiting mechanism disposed at the upper end of the turntable 15, and a liquid conveying mechanism fixed to the upper end of the testing platform 1 for inputting acid or alkali solution to the upper end of the turntable 15; The height of the first limiting mechanism is higher than the height of the first concrete test block 20; The first concrete test block 20 is placed on the upper end of the turntable 15 and is limited by the first limiting mechanism. The second concrete test block 27 is placed in the second limiting mechanism, and the lower end of the rolling mechanism is in contact with the upper end of the second concrete test block 27.

[0030] In use, the first concrete test block 20 is placed on the upper end of the turntable 15 and limited by the first limiting mechanism. The second concrete test block 27 is placed inside the second limiting mechanism. The lower end of the rolling mechanism is in contact with the upper end of the second concrete test block 27. The rodless cylinder 3 is activated to move the moving block 4 horizontally. The rolling mechanism can be used to roll and rub the upper surface of the second concrete test block 27. In addition, the reduction motor 14 is activated to rotate the turntable 15, and the second concrete test block 27 will also move in a circular motion. This allows the friction resistance of the second concrete test block 27 in the rotating state to be tested. When the turntable 15 rotates, the multiple first concrete test blocks 20 placed on the upper end of the turntable 15 and limited by the first limiting mechanism will rotate to below the friction mechanism and the pressing mechanism. The upper end of the first concrete test block 20 will be rubbed by the friction mechanism and can also be pressed down by the pressing mechanism. This allows for observation of the wear resistance of the first concrete test block 20 under continuous rotational friction or intermittent downward pressure applied to the upper end of the first concrete test block 20. In addition, acid or alkali can be injected into the upper end of the turntable 15 through the infusion mechanism to observe the wear resistance of the first concrete test block 20 after being soaked in acid or alkali.

[0031] In this embodiment, specifically: the rolling mechanism includes a U-shaped block 5 fixed to the lower end of the moving block 4 and small tires 6 rotatably installed on the inner walls of both sides of the U-shaped block 5, with the lower end of the small tires 6 in contact with the upper end of the second concrete test block 27.

[0032] In this embodiment, specifically: the friction mechanism includes a second frame 7 fixed to the upper end of the test platform 1, a first electric cylinder 8 fixed to the second frame 7, a lifting block 9 fixed to the lower end of the output shaft of the first electric cylinder 8, and a friction block 10 fixed to the side wall of the lifting block 9. The lower end of the friction block 10 is attached to the upper end of the first concrete test block 20.

[0033] In this embodiment, specifically: the pressing mechanism includes a fixed box 11 fixed to the upper end of the testing platform 1, a bearing block 12 fixed to one end of the fixed box 11 near the turntable 15, and a second electric cylinder 13 fixed to the upper end of the bearing block 12. The output shaft of the second electric cylinder 13 passes through the bearing block 12 and extends to the lower part of the bearing block 12. When the output shaft of the second electric cylinder 13 moves downward, it can contact the upper surface of the first concrete test block 20.

[0034] In this embodiment, specifically: the first limiting mechanism includes an inner ring 16 fixed to the upper end of the turntable 15, a groove 17 extending through the side wall of the inner ring 16, an outer ring 18 fixed to the upper end of the turntable 15, and a plurality of limiting blocks 19 fixed to the upper end of the turntable 15. The two sides of the first concrete test block 20 are attached to the ends of the two limiting blocks 19 that are close to each other, and the other two sides of the first concrete test block 20 are attached to the ends of the inner ring 16 and the outer ring 18 that are close to each other, respectively. The height of the outer ring 18 is higher than the height of the first concrete test block 20.

[0035] In this embodiment, specifically: the second limiting mechanism includes a central platform 25 fixed to the center of the upper end of the turntable 15 and a limiting frame 26 fixed to the upper end of the central platform 25, and the second concrete test block 27 is placed inside the limiting frame 26.

[0036] In this embodiment, specifically: a waste liquid discharge mechanism is provided at the lower end of the turntable 15. The waste liquid discharge mechanism includes a waste liquid discharge pipe 151 that is fixedly connected to the lower end of the turntable 15 and a valve body 152 provided on the waste liquid discharge pipe 151.

[0037] In this embodiment, specifically: the inner ring 16 and the outer ring 18 are concentrically arranged at the upper end of the turntable 15.

[0038] In this embodiment, specifically: the pressing mechanism and the friction mechanism are arranged at intervals along the circumference of the turntable 15 and are located above the rotation path of the first concrete test block 20.

[0039] Example 2: Based on Example 1, this example proposes a technical solution, specifically: the infusion mechanism includes a liquid tank 21 fixed to the upper end of the testing platform 1, a water pump 22, and a third frame 23. An outlet pipe 24 is fixed to the upper end of the third frame 23. The output end of the outlet pipe 24 faces the annular area formed by the inner ring 16 and the outer ring 18. The pumping end of the water pump 22 is connected to the outlet end of the liquid tank 21 via a pipe, and the outlet end of the water pump 22 is connected to the inlet end of the outlet pipe 24 via a pipe. The liquid is centrally stored in the liquid tank 21, and the third frame 23 fixes the outlet pipe 24 and sets its output end... Precise alignment with the annular test block area formed by the inner ring 16 and the outer ring 18 ensures that the corrosive liquid can be applied to the surface of all first concrete test blocks 20, providing a reliable basis for simulating environmental corrosion such as acid rain or de-icing agents. Through the power delivery of the water pump 22, the entire process from storage and pumping to spraying is automated. Users can control the start and stop and flow rate of the water pump 22 to accurately simulate corrosive environments of different intensities and durations, so that chemical corrosion factors and the mechanical wear process driven by the turntable 15 can be flexibly and synchronously coupled, greatly improving the standardization and repeatability of the test.

[0040] Working principle: First, multiple first concrete test blocks 20 are placed in the ring array slots formed by the inner ring 16, the outer ring 18 and multiple limiting blocks 19 on the upper end of the turntable 15 for stable positioning. At the same time, the second concrete test block 27 is placed in the limiting frame 26 on the upper end of the central platform 25 of the turntable 15. After starting, the geared motor 14 drives the turntable 15 to rotate at a constant speed, causing the first concrete test block 20 and the second concrete test block 27 on it to move in a circular motion together. The second concrete test block 27, located in the center, is equipped with a rolling mechanism consisting of a rodless cylinder 3 driving a moving block 4, a U-shaped block 5 fixed to its lower end, and a small tire 6. The small tire 6 continuously contacts and rolls with the upper surface of the second concrete test block 27, simulating the rolling friction of a vehicle tire. Meanwhile, as the turntable 15 rotates, the first concrete test blocks 20 arranged in a ring pass under the friction mechanism and the pressing mechanism fixed to the test platform 1 in sequence. The friction mechanism controls the pressing force and contact time of the lifting block 9 and the friction block 10 fixed to its side wall through the first electric cylinder 8, so as to implement adjustable sliding friction on the upper surface of the first concrete test block 20. The pressing mechanism extends downward periodically through the output shaft of the second electric cylinder 13 to apply intermittent impact pressure simulating vehicle load to the upper surface of the first concrete test block 20. When an environmental corrosion coupling test is required, the water pump 22 in the liquid delivery mechanism is started to pump the acid or alkali solution stored in the liquid tank 21 through the pipeline to the liquid outlet pipe 24, and spray it from the output end of the liquid outlet pipe 24 into the annular space formed by the inner ring 16 and the outer ring 18, so that the surface of the rotating first concrete specimen 20 is in continuous contact with the corrosive medium. The waste liquid generated during the test is discharged in a concentrated manner through the waste liquid discharge pipe 151 at the lower end of the turntable 15 and under the control of the valve body 152. The whole process realizes the multi-factor coupled accelerated wear test of the road material specimen block by simultaneously or sequentially applying rolling friction, sliding friction, dynamic pressure and chemical corrosion, thereby efficiently and comprehensively evaluating its comprehensive wear resistance performance.

[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0042] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A device for testing the wear resistance of highway pavement materials, characterized in that: The system includes a testing platform (1), a first frame (2) fixed to the upper end of the testing platform (1), a rodless cylinder (3) fixed to the side wall of the first frame (2), a moving block (4) fixed to the output end of the rodless cylinder (3), a rolling mechanism set at the lower end of the moving block (4) for rolling the upper surface of the second concrete test block (27), a pressing mechanism and a friction mechanism set at the upper end of the testing platform (1), a reduction motor (14) set at the center of the upper end of the testing platform (1), a turntable (15) fixed to the upper end of the output shaft of the reduction motor (14), a first limiting mechanism and a second limiting mechanism set at the upper end of the turntable (15), and a liquid delivery mechanism fixed to the upper end of the testing platform (1) for inputting acid or alkali solution to the upper end of the turntable (15). The height of the first limiting mechanism is higher than the height of the first concrete test block (20); The first concrete test block (20) is placed on the upper end of the turntable (15) and is limited by the first limiting mechanism. The second concrete test block (27) is placed in the second limiting mechanism. The lower end of the rolling mechanism and the upper end of the second concrete test block (27) are attached together.

2. The abrasion resistance testing device for highway pavement materials according to claim 1, characterized in that: The rolling mechanism includes a U-shaped block (5) fixed to the lower end of the moving block (4) and small tires (6) rotatably mounted on the inner walls of both sides of the U-shaped block (5). The lower end of the small tires (6) is attached to the upper end of the second concrete test block (27).

3. The device for testing the wear resistance of highway pavement materials according to claim 1, characterized in that: The friction mechanism includes a second frame (7) fixed to the upper end of the test bench (1), a first electric cylinder (8) fixed inside the second frame (7), a lifting block (9) fixed to the lower end of the output shaft of the first electric cylinder (8), and a friction block (10) fixed to the side wall of the lifting block (9). The lower end of the friction block (10) is attached to the upper end of the first concrete test block (20).

4. The device for testing the wear resistance of highway pavement materials according to claim 1, characterized in that: The pressing mechanism includes a fixed box (11) fixed to the upper end of the test platform (1), a bearing block (12) fixed to one end of the fixed box (11) near the turntable (15), and a second electric cylinder (13) fixed to the upper end of the bearing block (12). The output shaft of the second electric cylinder (13) passes through the bearing block (12) and extends to the lower part of the bearing block (12). When the output shaft of the second electric cylinder (13) moves downward, it can contact the upper surface of the first concrete test block (20).

5. The device for testing the wear resistance of highway pavement materials according to claim 1, characterized in that: The first limiting mechanism includes an inner ring (16) fixed to the upper end of the turntable (15), a groove (17) through which the inner ring (16) is opened, an outer ring (18) fixed to the upper end of the turntable (15), and multiple limiting blocks (19) fixed to the upper end of the turntable (15); the two sides of the first concrete test block (20) are attached to the ends of the two limiting blocks (19) that are close to each other, and the other two sides of the first concrete test block (20) are attached to the ends of the inner ring (16) and the outer ring (18) that are close to each other, respectively. The height of the outer ring (18) is higher than the height of the first concrete test block (20).

6. The device for testing the wear resistance of highway pavement materials according to claim 1, characterized in that: The second limiting mechanism includes a central platform (25) fixed to the center of the upper end of the turntable (15) and a limiting frame (26) fixed to the upper end of the central platform (25), and the second concrete test block (27) is placed in the limiting frame (26).

7. The device for testing the wear resistance of highway pavement materials according to claim 1, characterized in that: The infusion mechanism includes a liquid tank (21) fixed to the upper end of the testing platform (1), a water pump (22) and a third frame (23). The upper end of the third frame (23) is fixed with an outlet pipe (24). The output end of the outlet pipe (24) faces the annular area formed by the inner ring (16) and the outer ring (18). The pumping end of the water pump (22) is connected to the outlet end of the liquid tank (21) through a pipe. The outlet end of the water pump (22) is connected to the inlet end of the outlet pipe (24) through a pipe.

8. The device for testing the wear resistance of highway pavement materials according to claim 1, characterized in that: The lower end of the turntable (15) is provided with a waste liquid discharge mechanism, which includes a waste liquid discharge pipe (151) that is fixed to the lower end of the turntable (15) and a valve body (152) provided on the waste liquid discharge pipe (151).

9. The abrasion resistance testing device for highway pavement materials according to claim 5, characterized in that: The inner ring (16) and the outer ring (18) are concentrically set at the upper end of the turntable (15).

10. The device for testing the wear resistance of highway pavement materials according to claim 1, characterized in that: The pressing mechanism and the friction mechanism are arranged at intervals along the circumference of the turntable (15) and are located above the rotation path of the first concrete test block (20).

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