Cement concrete wear resistance test device and test method

Abstract

The application relates to the technical field of cement concrete performance detection, and discloses a cement concrete wear resistance test testing device and a test method, which comprise a base, a fixed sleeve on the base is provided with a protection frame for experiment protection, the top of the protection frame is connected with a simulation mechanism one for simulating the running state of a vehicle, the bottom of the simulation mechanism is connected with an executing mechanism, a simulation mechanism two for changing the experiment environment is arranged in the base, the two sides of the simulation mechanism two are connected with the protection frame, a standard test concrete block is clamped at the top of the simulation mechanism two, and the standard test concrete block is in contact with the executing mechanism. The application can simulate multidimensional working conditions, the test data is fitted to the actual engineering scene, the cement concrete pavement actual deterioration working condition can be accurately simulated, the coupling simulation of the vehicle running state and the natural environment is realized, the abrasion test is closer to the use scene of the cement concrete in the actual road, and the precision of the test data and the engineering reference value are greatly improved.

Description

Technical Field

[0001] This invention relates to the field of cement concrete performance testing technology, and in particular to a cement concrete abrasion resistance testing device and testing method. Background Technology

[0002] Cement concrete pavement is a common type of pavement structure in my country, and its wear resistance is a crucial indicator affecting its durability, playing a vital role in road traffic safety. From the perspective of non-pavement structural damage, the deterioration of the anti-skid and wear-resistant properties of the concrete surface is one of the significant factors contributing to the durability decline of cement concrete pavements. In the current "Test Procedures for Cement and Cement Concrete in Highway Engineering" (JTG 3420-2020), the test method for assessing the wear resistance of cement concrete is through a concrete abrasion tester. The wear pattern involves grinding a cubic cement concrete specimen with a bladed abrasive wheel, and the wear resistance is evaluated based on the amount of wear per unit area of ​​the specimen. However, this method of grinding cement concrete pavement with a bladed abrasive wheel differs significantly from the wear behavior of ordinary vehicle tires on cement concrete pavement, and cannot simulate the actual deterioration conditions of cement concrete pavement, thus failing to reflect specific usage scenarios. Summary of the Invention

[0003] To address the practical technical problems, this invention provides a testing device and method for testing the abrasion resistance of cement concrete.

[0004] The present invention is achieved by the following technical solution: a cement concrete abrasion resistance test device, including a base, a protective frame for experimental protection fixedly sleeved on the base, a simulation mechanism one for simulating vehicle operation state connected to the top of the protective frame, an execution mechanism connected to the bottom of the simulation mechanism, a simulation mechanism two for changing the experimental environment set inside the base, and both sides of the simulation mechanism two are connected to the protective frame, a standard test concrete block is clamped at the top of the simulation mechanism two, and the standard test concrete block is in contact with the execution mechanism.

[0005] As a further improvement to the above scheme, the simulation mechanism 2 also includes an auxiliary box set in the base. The auxiliary box contains a filter box and a water tank. One side of the filter box and the water tank is connected to a flexible pipe connected to the protective frame. The base also contains a circulation component for circulating the liquid in the water tank. The circulation component is also connected to a transverse box and a support plate that are in contact with the standard test concrete block. The bottom of the transverse box is fixedly connected to a pneumatic cylinder 1 that is slidably connected to the auxiliary box. The bottom of the pneumatic cylinder 1 is connected to a pneumatic cylinder 4 that is connected to the auxiliary box.

[0006] As a further improvement to the above scheme, the simulation mechanism 2 also includes an isolation chamber and a circulation chamber set in the auxiliary box. A pump body is set in the isolation chamber, one end of which extends into the filter box. A supplementary pipe extending to the outside of the base is connected to one side of the circulation chamber, and one side of the supplementary pipe is connected to the circulation component. Multiple heating wires are also set in the support plate.

[0007] As a further improvement to the above solution, the circulation assembly includes a water pump located in the circulation chamber, the output end of the water pump is connected to a water supply pipe extending into the water tank, and the side of the water tank away from the water supply pipe is connected to a return pipe connected to the input end of the water pump. The replenishment pipe is connected to the return pipe, and a diversion pipe connected to a pneumatic cylinder is connected to one side of its water supply pipe.

[0008] As a further improvement to the above solution, the top of the auxiliary box is connected to a collection pipe that is connected to the water tank. A one-way valve is connected to the collection pipe. The top of the auxiliary box is also connected to a barrier. One end of the flexible pipe is connected to a connecting plate, which is sealed and snapped into the protective frame.

[0009] As a further improvement to the above scheme, the simulation mechanism includes a packaging box connected to the top of the protective frame. A disturbance component is installed inside the packaging box, and the output end of the disturbance component is rotatably connected to a vertically arranged adjustment component. The moving end of the adjustment component is fixedly connected to a middle plate, the bottom of the middle plate is rotatably connected to a connecting rod, and the other end of the connecting rod is rotatably connected to a follower sleeve. A mounting frame is slidably fitted in the middle of the follower sleeve, and both sides of the follower sleeve are connected to adjustment components two that are fixedly connected to the mounting frame. Both sides of the mounting frame are connected to telescopic rods that are connected to the protective frame, and the mounting frame is connected to the actuator.

[0010] As a further improvement to the above scheme, both adjustment component one and adjustment component two include a sleeve one. A pneumatic cylinder three is fixedly connected inside the sleeve one. A movable piece that slides against the inner wall of the sleeve one is fixedly connected to the movable end of the pneumatic cylinder three. Multiple springs are fixedly connected to one side of the movable piece, and a movable column that slides against the sleeve one is fixedly connected to the other end of the spring. The movable column on adjustment component one is connected to the intermediate plate, and the sleeve one is connected to the disturbance component. The sleeve one on adjustment component two is connected to the mounting bracket, and the movable column is connected to the follower sleeve.

[0011] As a further improvement to the above solution, the disturbance component includes a servo motor housed within the encapsulation box. The output end of the servo motor is connected to a transmission assembly. A movable moving gear is connected to the outer side of the transmission assembly via a spline drive. A moving sleeve is rotatably connected to one side of the moving gear, and a slider is fixedly connected to one side of the moving sleeve. An electric lead screw is also connected inside the encapsulation box. The slider is fixedly connected to the moving end of the electric lead screw. A reducer fixedly connected to the encapsulation box is driven to one side of the moving gear. Three reducers are provided. A transmission is driven to the output end of each reducer. A gearbox is fixedly connected to the outer side of each transmission. A disturbance unit is housed within the gearbox. The actuator end of the moving unit is connected to a connecting column connected to the sleeve; the disturbance units on both sides include pneumatic actuators fixedly connected to the gearbox, the power end of the pneumatic actuators is connected to the transmission, the moving end of the pneumatic actuators is fixedly connected to a telescopic sleeve, and the moving end of the telescopic sleeve is rotatably connected to the connecting column; the disturbance unit in the middle includes a transmission rod that is connected to the output end of the transmission via a universal coupling, a transmission ring that is connected to one side of the transmission rod, a transmission column that is connected to the transmission ring via a spline, a converter that is connected to one end of the transmission column, multiple eccentric blocks that are connected to the output end of the converter, and a rotatably connected end of the transmission column to the connecting column.

[0012] As a further improvement to the above scheme, the actuator includes a plug rod fixedly connected to the mounting bracket, a power component fixedly connected to the plug rod, storage boxes that engage with the transverse rods on both sides of the power component, a flow control pipe at the bottom of the storage box, a flow control valve connected to the flow control pipe, and a transmission gear connected to the output end of the power component, with simulated wheels that contact the standard test concrete block connected to both sides of the transmission gear.

[0013] As a further improvement to the above scheme, a clamp is provided inside the base. The clamp is used to clamp standard test concrete blocks of different specifications. On the other two sides of the standard test concrete block, there are pneumatic cylinders II located inside the base. The moving end of the pneumatic cylinders II is connected to a clamping plate that contacts the standard test concrete block.

[0014] A test method for testing the abrasion resistance of cement concrete includes the following steps:

[0015] S1: Batch molding of cement concrete specimens of a fixed thickness. The specimens are then placed on a specimen platform and their positions adjusted.

[0016] S2: Turn on the power supply. According to the experimental requirements, make the sand-cement concrete specimen fully contact the corresponding device, and adjust the equipment to simulate the effects of different environments and loads on cement concrete pavement.

[0017] S3: Accelerate the wear of cement concrete specimens and design specific test times according to specific environments;

[0018] S4: Stop the test and measure the wear depth, mass loss and surface friction coefficient of the cement concrete specimen. By comparing various data, determine the anti-slip and wear resistance of the specimen.

[0019] S5: Replace the cement concrete specimen and conduct a second test to ensure the generalizability of the test data.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] 1. Through the operation of simulation mechanism one and simulation mechanism two, multi-dimensional working conditions can be simulated. The test data closely matches the actual engineering scenario and more accurately simulates the actual deterioration of cement concrete pavement. It realizes the coupled simulation of vehicle operation status and natural environment, making the wear test closer to the actual use scenario of cement concrete on the road, and greatly improving the accuracy of test data and engineering reference value.

[0022] 2. Modular design allows for individual control of different variables, facilitating observation during the experiment and routine maintenance and repair of the equipment, thus reducing the cost of using and maintaining the device.

[0023] 3. By conducting multiple tests using different methods, more accurate data can be obtained, thereby stabilizing data fluctuations and obtaining stable and accurate wear resistance data. Attached Figure Description

[0024] Figure 1 This is a rear view of the overall structure of the present invention;

[0025] Figure 2 This is a partial front view structural diagram of the present invention;

[0026] Figure 3 This is a partial front view structural diagram of the simulated mechanism 2;

[0027] Figure 4 This is a schematic diagram of the main sectional view of the simulated mechanism 2;

[0028] Figure 5 This is a partial rear view structural diagram of the present invention;

[0029] Figure 6 This is a partial rear view schematic diagram of the present invention;

[0030] Figure 7 This is a partial front view diagram of the simulated mechanism;

[0031] Figure 8 This is a partial front sectional view of the simulated mechanism;

[0032] Figure 9 This is a partial front view of the disturbance component.

[0033] Figure 10 This is a schematic diagram of the front sectional view of the disturbance component;

[0034] Figure 11 This is a partial side view of the disturbance component.

[0035] Figure 12 For adjusting the local front view mechanism diagram of the component.

[0036] Explanation of reference numerals in the attached figures:

[0037] 01. Base; 02. Protective frame; 03. Observation cover; 05. Connecting plate; 06. Flexible tube; 07. Clamp; 08. Intermediate plate; 09. Sleeve 1; 15. Gearbox; 16. Transmission assembly; 17. Encapsulation box; 18. Mounting frame; 19. Power assembly; 20. Simulation wheel; 21. Standard test concrete block; 22. Auxiliary box; 23. Pneumatic cylinder 1; 24. Telescopic rod; 25. Storage box; 26. Connecting rod; 28. Transmission gear; 29. ​​Pneumatic cylinder 2; 30. Clamping plate; 31. Moving column; 32. Follower sleeve; 33. Pneumatic cylinder 3; 34. Moving plate; 35. Spring 36. Moving gear; 37. Servo motor; 38. Reducer; 40. Electric lead screw; 42. Connecting column; 43. Pneumatic actuator; 44. Transmission device; 45. Telescopic sleeve; 46. Slider; 47. Moving sleeve; 48. Transmission column; 49. Transmission ring; 50. Horizontal box; 51. Enclosure; 52. Collection pipe; 53. Support plate; 54. Water tank; 55. Water supply pipe; 56. Diverter pipe; 57. Pneumatic cylinder four; 58. Water pump; 59. Isolation chamber; 60. Circulation chamber; 61. Filter box; 62. Converter; 63. Eccentric block; 64. Pump body; 65. Supplement pipe; 67. Transmission rod. Detailed Implementation

[0038] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0039] Example 1:

[0040] like Figures 1-4As shown, a cement concrete abrasion resistance testing device includes a base 01, on which a protective frame 02 for experimental protection is fixedly fitted. The base 01 and the protective frame 02 form a closed space to isolate interference from the external environment. An observation cover 03 is rotatably connected to the top of the protective frame 02, allowing for easy viewing or maintenance of the interior. A simulation mechanism 1 for simulating vehicle operation is connected to the top of the protective frame 02, and an actuator is connected to the bottom of the simulation mechanism. The simulation mechanism 1 simulates the state of a vehicle during operation and the impact of the vehicle on the ground. The impact is then transmitted through the actuator to the standard test concrete block 21 at the bottom, thereby simulating the wear and tear of the standard test concrete block 21 by the vehicle at different speeds and under different conditions. The base 01 is equipped with a simulation mechanism 2 for changing the experimental environment, and both sides of the simulation mechanism 2 are connected to the protective frame 02. The top of the simulation mechanism 2 holds the standard test concrete block 21, and the standard test concrete block 21 is in contact with the actuator. The simulation mechanism 2 simulates the ground environment and ground conditions, further ensuring the simulation of the real operating environment, thereby obtaining more accurate experimental data.

[0041] The simulation mechanism two also includes an auxiliary box 22 housed within the base 01. The auxiliary box 22 contains a filter box 61 and a water tank 54. The filter box 61 has multiple filter screens, with filter material filling the spaces between the screens to filter dust that may be generated during the experiment. The water tank 54 is filled with clean water to humidify the experimental material, i.e., the concrete, simulating rainy or humid environments. Both the filter box 61 and the water tank 54 have flexible pipes 06 connected to the protective frame 02 on one side. Fluid can flow through the flexible pipes 06, entering the protective frame 02 or the auxiliary box 22 from the protective frame 02. The base 01 also includes a system for circulating the liquid within the water tank 54. The circulation assembly is also connected to a transverse box 50 and a support plate 53 that are in contact with the standard test concrete block 21. The bottom of the transverse box 50 is fixedly connected to a pneumatic cylinder 23 that is slidably connected to an auxiliary box 22, and the bottom of the pneumatic cylinder 23 is connected to a pneumatic cylinder 57 that is connected to the auxiliary box 22. The circulation assembly is used to circulate liquid and supply water to the test material to increase the humidity of the test material and simulate the wear resistance of the test material in rainy weather or other environments. The pneumatic cylinder 57 can extend or retract to move the pneumatic cylinder 23, the transverse box 50 and the enclosure 51, to pressurize the bottom of the standard test concrete block 21 or reduce the support for the standard test concrete block 21, simulating the influence of the underground environment on the test.

[0042] The simulation mechanism 2 also includes an isolation chamber 59 and a circulation chamber 60 located in the auxiliary box 22. A pump body 64 is installed in the isolation chamber 59, with one end of the pump body 64 extending into the filter box 61. A replenishment pipe 65 extending to the outside of the base 01 is connected to one side of the circulation chamber 60, and one side of the replenishment pipe 65 is connected to the circulation component. Multiple heating wires are also installed in the support plate 53. The isolation chamber 59 and the circulation chamber 60 provide corresponding spaces. The pump body 64 is used to draw gas from the filter box 61 to create a negative pressure state, thereby drawing air from the protective frame 02. The replenishment pipe 65 is connected to the simulation component and can be used to introduce acidic or other corrosive liquids that may be encountered in the open environment, mixing them with clean water to simulate acidic rainwater or other road spills, further conforming to the wear resistance of the standard test concrete block 21 under different environments. The heating wires can heat the standard test concrete block 21 to simulate the difference in wear resistance of the standard test concrete block 21 under different seasonal temperatures.

[0043] The circulation assembly includes a water pump 58 located in the circulation chamber 60. The output end of the water pump 58 is connected to a water supply pipe 55 extending into the water tank 54. A return pipe connected to the input end of the water pump 58 is connected to the side of the water tank 54 away from the water supply pipe 55. A replenishment pipe 65 is connected to the return pipe. A diversion pipe 56 connected to the pneumatic cylinder 23 is connected to one side of the water supply pipe 55. By pumping the water pump 58, liquid can be drawn from the water tank 54 through the return pipe and then enter the flexible pipe 06 through the water supply pipe 55, thereby allowing the liquid to enter the top of the standard test concrete block 21 and change the humidity. At the same time, the liquid drawn from the water tank 54 through the return pipe can be simultaneously fed into the replenishment pipe 65 to add acidic liquid. Through the diversion pipe 56, the liquid can pass through the pneumatic cylinder 23, the transverse box 50, and the support plate 53 to contact the bottom of the concrete, simulating the wear resistance of the top concrete when the groundwater content is different, thereby further realizing the simulation of different humidity levels.

[0044] The top of the auxiliary box 22 is connected to a collection pipe 52 that communicates with the water tank 54. A one-way valve is connected to the collection pipe 52. The top of the auxiliary box 22 is also connected to a barrier 51. One end of the flexible pipe 06 is connected to a connecting plate 05. The connecting plate 05 is sealed and snapped into the protective frame 02. The collection pipe 52 is used to recover water that the concrete has not absorbed and then record it back into the water tank 54 for recycling. The connecting plate 05 is used for sealing and connecting the flexible pipe 06 and the protective frame 02. At the same time, a hole is provided on one side of the connecting plate 05 for the passage of fluid.

[0045] The implementation principle of this application embodiment is as follows: During operation, a pre-cut standard test concrete block 21 is installed and placed inside the base 01. Simultaneously, it is clamped by the clamping plate 30 and the clamping device 07 to obtain initial internal stress. At this time, the power is turned on, and the simulation mechanism works, thereby simulating the state of vehicle operation. Simultaneously, through the contact between the execution structure and the standard test concrete block 21, the wear operation is continuously carried out. During the process, liquid is pumped from the water tank 54 through the return pipe, and acidic liquid can be added through the replenishment pipe 65. Simultaneously, through the diversion pipe 56, the liquid can pass through the pneumatic cylinder 23, the transverse box 50, and the support plate 53 to contact the bottom of the concrete, simulating underground water content. When the amount is different, it can also be sprayed onto the surface of the standard test concrete block 21 through the water tank 54 and flexible pipe 06, thereby further realizing the simulation of different humidity. And through the expulsion of the pneumatic cylinder 57, different underground stresses can be provided, thus more closely matching the actual situation. During the operation, when the pump body 64 is sucking in the forward direction, it can also suck in the gas in the protective frame 02, so that the polished dust is filtered through the filter box 61 and collected, thereby achieving cleanliness in the protective frame 02. At the same time, it can also be blown out in the opposite direction, so that the dust in the filter box 61 enters the surface of the standard test concrete block 21 through the flexible pipe 06 and connecting plate 05, simulating the wear resistance of the standard test concrete block 21 in a sand and dust environment.

[0046] Example 2:

[0047] Combination Figures 1-12 This embodiment is an improvement on embodiment 1, further described in the following aspects:

[0048] The simulation mechanism includes a casing 17 connected to the top of the protective frame 02. A disturbance component is installed inside the casing 17, and the output end of the disturbance component is rotatably connected to a vertically arranged adjustment component. The moving end of the adjustment component is fixedly connected to an intermediate plate 08. The disturbance component can generate irregular disturbances, which are then transmitted to a connecting rod 26 after passing through the intermediate plate 08. The bottom of the intermediate plate 08 is rotatably connected to the connecting rod 26, and the other end of the connecting rod 26 is rotatably connected to a follower sleeve 32. A mounting bracket 18 is slidably fitted in the middle of the follower sleeve 32. The disturbance transmitted to the connecting rod 26 is transmitted to the mounting frame 18 via the follower sleeve 32, and then further transmitted to the actuator to realize the wear condition of the vehicle on the standard test concrete block 21 under different driving conditions. Both sides of the follower sleeve 32 are connected to the adjustment component 2 which is fixedly connected to the mounting frame 18. Both sides of the mounting frame 18 are connected to the telescopic rod 24 which is connected to the protective frame 02. The mounting frame 18 is connected to the actuator. The adjustment component 2 can assist in adjusting the movement trajectory of the follower sleeve 32, so that the test is within a controllable range.

[0049] Both adjustment components one and two include a sleeve one 09. A pneumatic cylinder three 33 is fixedly connected inside the sleeve one 09. A movable piece 34 that slides against the inner wall of the sleeve one 09 is fixedly connected to the movable end of the pneumatic cylinder three 33. A plurality of springs 35 are fixedly connected to one side of the movable piece 34. A movable column 31 that slides against the sleeve one 09 is fixedly connected to the other end of the spring 35. According to specific test requirements, the pneumatic cylinder three 33 can be adjusted in advance to move the movable piece 34, which is then transmitted to the movable column 31 through the spring 35. Under a limited distance, the initial elastic potential energy of the spring 35 changes.

[0050] Among them, the movable column 31 located on the adjustment component is connected to the intermediate plate 08, and the sleeve 09 is connected to the disturbance component. That is, by adjustment, the initial extrusion pressure can be adjusted to simulate the effect of different vehicle weights on concrete specimens.

[0051] The sleeve 09 located on the adjustment component 2 is connected to the mounting bracket 18, and the moving column 31 is connected to the follower sleeve 32. Through initial adjustment, the swing distance of the follower sleeve 32 can be changed, that is, the uneven force on the two simulation wheels 20 during operation can be changed.

[0052] The disturbance component includes a servo motor 37 housed within the enclosure 17. The output end of the servo motor 37 is connected to a transmission assembly 16, which is composed of basic mechanisms such as worm gears, gears, and transmission shafts. It can transmit corresponding power and can be adaptively combined according to specific design requirements. A movable moving gear 36 is connected to the outer side of the transmission assembly 16 via a spline drive. A movable sleeve 47 is rotatably connected to one side of the moving gear 36. Through the power supply from the servo motor 37 and the power transmission from the transmission assembly 16, the moving gear 36 can rotate synchronously, but one side of the transmission assembly 16 does not rotate. A slider 46 is fixedly connected to one side of the movable sleeve 47. An electric lead screw 40 is also connected inside the enclosure 17. The slider 46 is fixedly connected to the moving end of the electric lead screw 40. Driven by the electric lead screw 40, the corresponding slider 46 can be moved. 6. Moving the sleeve 47 drives the corresponding moving gear 36 to move. The moving gear 36 can be controlled to move, thereby contacting different reducers 38 for further power transmission. One side of the moving gear 36 is connected to a reducer 38 fixedly connected to the encapsulation box 17. There are 3 reducers 38. The output end of the reducer 38 is connected to a transmission 44. The outside of the transmission 44 is fixedly connected to a gearbox 15. A disturbance unit is set inside the gearbox 15. The execution end of the disturbance unit is connected to a connecting post 42 connected to the sleeve 09. Through the transmission of the reducer 38, the torque can be further transmitted to the transmission 44. Then the transmission 44 transmits it to the corresponding disturbance unit to realize the corresponding disturbance work. The connecting post 42 transmits the action output by the disturbance unit to the sleeve 09 for the next step of transmission.

[0053] The disturbance units located on both sides include pneumatic actuators 43 fixedly connected to the transmission 15. The power end of the pneumatic actuator 43 is connected to the transmission 44. The moving end of the pneumatic actuator 43 is fixedly connected to a telescopic sleeve 45, and the moving end of the telescopic sleeve 45 is rotatably connected to the connecting column 42. The pneumatic actuator 43 is an existing mechanism. Under the power supply, it draws in external gas and enters the telescopic sleeve 45 for pressurization, thereby enabling the moving end of the telescopic sleeve 45 to move, driving the connecting column 42 to move, so that the overall extrusion pressure on the standard test concrete block 21 is different, thereby simulating the wear conditions under different vehicle weights. When the extension lengths of the telescopic sleeves 45 on both sides are different, a certain force difference can be generated on the standard test concrete block 21, thereby simulating real driving conditions.

[0054] The disturbance unit located in the middle includes a transmission rod 67 that is connected to the output end of the transmission device 44 via a universal coupling. A transmission ring 49 is connected to one side of the transmission rod 67. The transmission ring 49 is connected to a transmission column 48 via a spline. A converter 62 is connected to one end of the transmission column 48. Multiple eccentric blocks 63 are connected to the output end of the converter 62. The bottom end of the transmission column 48 is rotatably connected to the connecting column 42. The converter 62 is a combination of bevel gears, gears, and transmission shafts, which can be freely combined under specific operating conditions. The transmission rod 67 is a combination of worm gears and rods, which can also be freely combined under specific operating conditions. Under the torque output by the transmission device 44, it can drive the transmission ring 49 to rotate, which in turn drives the corresponding transmission column 48 to rotate. Thus, the force is diverted by the converter 62, driving the eccentric blocks 63 to rotate. The multiple eccentric blocks 63 have different eccentric angles, so during the rotation of the eccentric blocks 63, they will drive the connecting column 42 and the transmission column 48 to vibrate in different directions, which is further transmitted through the connecting column 42.

[0055] The implementation principle of this application embodiment is as follows: During the test, the power component 19 is activated as needed, thereby driving the simulation wheel 20 to rotate through the transmission gear 28 to simulate vehicle driving. At the same time, according to specific usage needs, the electric lead screw 40 can be controlled to move the slider 46, the moving sleeve 47, and the moving gear 36. The moving gear 36 contacts the input ends of different reducers 38. When it contacts the reducers 38 on both sides, it drives the transmission 44 to transmit power. Under the power supply, it draws in external gas into the telescopic sleeve 45 for pressurization, thereby causing the moving end of the telescopic sleeve 45 to move, driving the connecting column 42 to move, so that the overall extrusion pressure on the standard test concrete block 21 is different, thereby simulating the wear under different vehicle weight conditions. When the extension lengths of the telescopic sleeves 45 on both sides are different, the standard test concrete block 21 can be subjected to different pressures. 1. A certain force difference is generated to simulate real driving conditions. When it comes into contact with the intermediate reducer 38, it will drive the transmission 44 to transmit power. Under the power supply, the transmission ring 49 will rotate, which will further drive the corresponding transmission column 48 to rotate. Then, after the converter 62 splits the current, it will drive the eccentric block 63 to rotate. The eccentric angles of the multiple eccentric blocks 63 are different. During the rotation of the eccentric block 63, the connecting column 42 and the transmission column 48 will vibrate in different directions. This vibration will be further transmitted through the connecting column 42 to realize the vibration of the intermediate plate 08. At this time, the follower sleeve 32 will drive the mounting frame 18 and the simulation wheel 20 to vibrate up and down. At the same time, the follower sleeve 32 will slide on the top of the mounting frame 18, which will change the contact surface between the simulation wheel 20 and the standard test concrete block 21 and the contact pressure at different points, simulating the actual situation.

[0056] Example 3:

[0057] Combination Figures 1-12 This embodiment is an improvement on embodiment 1, further described in the following aspects:

[0058] The actuator includes a plug-in rod fixedly connected to the mounting bracket 18. A power assembly 19 is fixedly connected to the plug-in rod. Storage boxes 25 that engage with transverse rods are provided on both sides of the power assembly 19. A flow control pipe is provided at the bottom of the storage box 25, and a flow control valve is connected to the flow control pipe. A transmission gear 28 is driven to the output end of the power assembly 19. Simulation wheels 20 that contact the standard test concrete block 21 are connected to both sides of the transmission gear 28. The storage box 25 is pre-filled with viscous liquid. During operation, the flow rate is controlled by the flow control pipe, and the liquid drips onto the simulation wheels 20 to simulate different unexpected environments. The power assembly 19 is an existing mechanism with a drive motor and a gearbox inside. When energized, it can transmit torque to drive the corresponding transmission gear 28 to rotate, thereby driving the simulation wheels 20 to rotate and simulating the process of vehicle driving.

[0059] A clamp 07 is installed inside the base 01. The clamp 07 is used to clamp standard test concrete blocks 21 of different specifications. On the other two sides of the standard test concrete block 21, there are pneumatic cylinders 29 located inside the base 01. The moving end of the pneumatic cylinders 29 is connected to a clamping plate 30 that contacts the standard test concrete block 21. The clamp 07 clamps the standard test concrete block 21. At the same time, the pneumatic cylinders 29 are adjusted, which can drive the clamping plate 30 to move. This allows the force on all four sides of the standard test concrete block 21 to be adjusted, simulating the wear resistance of the standard test concrete block 21 under the internal stress caused by different environments, and further conforming to the actual road surface conditions.

[0060] Example 4: A test method for the abrasion resistance of cement concrete, comprising the following steps:

[0061] S1: Batch molding of cement concrete specimens of a fixed thickness. The specimens are placed on the specimen platform and their positions are adjusted. Molding multiple concrete specimens at once ensures the stability of the internal structure and materials of the samples, ensuring the stability of the raw material performance in multiple tests. Furthermore, the initial position and angle adjustment errors during installation should be small to avoid uneven stress during subsequent tests, which could affect the data.

[0062] S2: Turn on the power supply. According to the experimental requirements, make the sand-cement concrete specimen fully contact the corresponding device, adjust the equipment to simulate the effect of different environments and loads on the cement concrete pavement, and simulate the wear under different environments and loads by adjusting the parameters of each internal device.

[0063] S3: Accelerate the wear of cement concrete specimens and design specific test times according to the specific environment. The specific test time is designed according to the test requirements and the rotation speed of the equipment in the test.

[0064] S4: Stop the test and measure the wear depth, mass loss and surface friction coefficient of the cement concrete specimen. By comparing various data, determine the anti-slip and wear resistance of the specimen. Determine the wear resistance of the specimen through various data parameters.

[0065] S5: Replace the cement concrete specimen and conduct a second test to ensure the generalizability of the test data.

[0066] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A testing device for the abrasion resistance of cement concrete, characterized in that, Includes a base (01), on which a protective frame (02) for experimental protection is fixedly fitted. The top of the protective frame (02) is connected to a simulation mechanism one for simulating vehicle operation. The bottom of the simulation mechanism is connected to an execution mechanism. The base (01) is provided with a simulation mechanism two for simulating changes in the experimental environment. Both sides of the simulation mechanism two are connected to the protective frame (02). The top of the simulation mechanism two holds a standard test concrete block (21), and the standard test concrete block (21) is in contact with the execution mechanism. The simulation mechanism 2 further includes an auxiliary box (22) set in the base (01). The auxiliary box (22) is equipped with a filter box (61) and a water tank (54). One side of the filter box (61) and the water tank (54) is connected to a flexible pipe (06) connected to the protective frame (02). The base (01) is also equipped with a circulation component for circulating the liquid in the water tank (54). The circulation component is also connected to a transverse box (50) and a support plate (53) that are in contact with the standard test concrete block (21). The bottom of the transverse box (50) is fixedly connected to a pneumatic cylinder 1 (23) that is slidably connected to the auxiliary box (22). The bottom of the pneumatic cylinder 1 (23) is connected to a pneumatic cylinder 4 (57) that is connected to the auxiliary box (22).

2. The cement concrete abrasion resistance testing device as described in claim 1, characterized in that, The simulation mechanism 2 also includes an isolation chamber (59) and a circulation chamber (60) disposed in the auxiliary box (22). A pump body (64) is disposed in the isolation chamber (59), one end of which extends into the filter box (61). A supplementary pipe (65) extending to the outside of the base (01) is connected to one side of the circulation chamber (60), and one side of the supplementary pipe (65) is connected to the circulation assembly. Multiple heating wires are also disposed in the support plate (53).

3. The cement concrete abrasion resistance testing device as described in claim 2, characterized in that, The circulation assembly includes a water pump (58) located in the circulation chamber (60), the output end of the water pump (58) is connected to a water supply pipe (55) extending into the water tank (54), and the side of the water tank (54) away from the water supply pipe (55) is connected to a return pipe connected to the input end of the water pump (58). The supplement pipe (65) is connected to the return pipe, and one side of the water supply pipe (55) is connected to a diversion pipe (56) connected to the pneumatic cylinder (23).

4. The cement concrete abrasion resistance testing device as described in claim 3, characterized in that, The top of the auxiliary box (22) is connected to a collection pipe (52) that communicates with the water tank (54). A one-way valve is connected to the collection pipe (52). The top of the auxiliary box (22) is also connected to a barrier (51). One end of the flexible pipe (06) is connected to a connecting plate (05). The connecting plate (05) is sealed and snapped into the protective frame (02).

5. The cement concrete abrasion resistance testing device as described in claim 1, characterized in that, The simulation mechanism includes a packaging box (17) connected to the top of the protective frame (02). A disturbance component is provided inside the packaging box (17), and the output end of the disturbance component is rotatably connected to a vertically arranged adjustment component. The moving end of the adjustment component is fixedly connected to an intermediate plate (08). A connecting rod (26) is rotatably connected to the bottom of the intermediate plate (08), and a follower sleeve (32) is rotatably connected to the other end of the connecting rod (26). A mounting frame (18) is slidably fitted in the middle of the follower sleeve (32), and adjustment components (24) are fixedly connected to the mounting frame (18) on both sides of the follower sleeve (32). Telescopic rods (24) connected to the protective frame (02) are connected to both sides of the mounting frame (18), and the mounting frame (18) is connected to the actuator.

6. The cement concrete abrasion resistance testing device as described in claim 5, characterized in that, Both the first adjustment component and the second adjustment component include a sleeve (09). A pneumatic cylinder (33) is fixedly connected inside the sleeve (09). A movable piece (34) that slides against the inner wall of the sleeve (09) is fixedly connected to the movable end of the pneumatic cylinder (33). A plurality of springs (35) are fixedly connected to one side of the movable piece (34). A movable column (31) that slides against the sleeve (09) is fixedly connected to the other end of the spring (35). Among them, the movable column (31) located on the first adjustment component is connected to the intermediate plate (08), and the first sleeve (09) is connected to the disturbance component; The sleeve 1 (09) located on the adjustment component 2 is connected to the mounting bracket (18), and the moving column (31) is connected to the follower sleeve (32).

7. The cement concrete abrasion resistance testing device as described in claim 6, characterized in that, The disturbance component includes a servo motor (37) installed in the encapsulation box (17). The output end of the servo motor (37) is connected to a transmission component (16). The outer side of the transmission component (16) is connected to a movable moving gear (36) via a spline transmission. A moving sleeve (47) is rotatably connected to one side of the moving gear (36). A slider (46) is fixedly connected to one side of the moving sleeve (47). An electric lead screw (40) is also connected inside the encapsulation box (17). The slider (46) is fixedly connected to the moving end of the electric lead screw (40). A reducer (38) is connected to one side of the moving gear (36) and fixedly connected to the encapsulation box (17). Multiple reducers (38) are provided. A transmission (44) is connected to the output end of the reducer (38). A gearbox (15) is fixedly connected to the outer side of the transmission (44). A disturbance unit is provided inside the gearbox (15). The execution end of the disturbance unit is connected to a connecting column (42) connected to the sleeve (09). Among them, the disturbance units located on both sides include a pneumatic device (43) fixedly connected to the transmission (15). The power end of the pneumatic device (43) is connected to the transmission (44). The moving end of the pneumatic device (43) is fixedly connected to a telescopic sleeve (45), and the moving end of the telescopic sleeve (45) is rotatably connected to the connecting column (42). The disturbance unit located in the middle includes a transmission rod (67) that is connected to the output end of the transmission device (44) via a universal coupling. A transmission ring (49) is connected to one side of the transmission rod (67). A transmission column (48) is connected to the transmission ring (49) via a spline. A converter (62) is connected to one end of the transmission column (48). Multiple eccentric blocks (63) are connected to the output end of the converter (62). The bottom end of the transmission column (48) is rotatably connected to the connecting column (42).

8. The cement concrete abrasion resistance testing device as described in claim 7, characterized in that, The actuator includes a plug rod fixedly connected to the mounting bracket (18), and a power assembly (19) is fixedly connected to the plug rod. Both sides of the power assembly (19) are provided with storage boxes (25) that are engaged with the transverse rod. The bottom of the storage box (25) is provided with a flow control pipe, and a flow control valve is connected to the flow control pipe. The output end of the power assembly (19) is connected to a transmission gear (28), and both sides of the transmission gear (28) are connected to simulation wheels (20) that are in contact with the standard test concrete block (21).

9. The cement concrete abrasion resistance testing device as described in claim 8, characterized in that, The base (01) is provided with a clamp (07) for clamping standard test concrete blocks (21) of different specifications. On the other two sides of the standard test concrete block (21), there are pneumatic cylinders (29) located in the base (01). The moving end of the pneumatic cylinder (29) is connected to a clamping plate (30) that contacts the standard test concrete block (21).

10. A test method for the abrasion resistance of cement concrete, characterized in that, Includes the following steps: S1: Batch molding of cement concrete specimens of fixed thickness, placing the specimens on the specimen platform, and adjusting their positions; S2: Turn on the power supply, and according to the experimental requirements, make the cement concrete specimen fully contact the corresponding device, and adjust the equipment to simulate the effects of different environments and loads on the cement concrete pavement. S3: Accelerate the wear of cement concrete specimens and design specific test times according to specific environments; S4: Stop the test and measure the wear depth, mass loss and surface friction coefficient of the cement concrete specimen. By comparing various data, determine the anti-slip and wear resistance of the specimen. S5: Replace the cement concrete specimen and conduct a second test to ensure the generalizability of the test data.

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