Testing device for dynamic water scouring performance of pavement material

Abstract

The utility model provides a testing device for dynamic water scouring performance of a pavement material. The testing device comprises a main body structure, a driving structure, a spraying structure, a supporting structure, a parameter detection structure and a controller, the controller is in communication connection with the driving structure, the spraying structure and the parameter detection structure; a liquid containing groove is formed in a cavity of the main body structure, and the spraying structure communicates with the liquid containing groove through a pipeline. The supporting structure is used for placing a pavement material test piece; the controller is used for triggering the driving structure to drive the spraying structure to move to a target position; the controller is further used for triggering the driving structure to execute corresponding driving operation based on the sent set driving instruction, so that the liquid in the liquid containing groove is conveyed to the spraying position of the spraying structure through the pipeline; and driving a spraying structure located at the target position to execute corresponding spraying operation on the pavement material test piece based on the sent set spraying instruction. And the test precision is improved by simulating the dynamic water scouring condition of the actual road surface.

Description

Technical Field

[0001] This utility model relates to the field of testing equipment technology, and in particular to a testing device for the dynamic water erosion performance of road surface materials. Background Technology

[0002] With the rapid growth of urban population and the increase in motor vehicle ownership, urban road traffic pressure has significantly increased. Road surface materials bear enormous vehicle loads and frequent traffic, leading to more severe wear and damage. Simultaneously, global climate change has resulted in more frequent extreme weather events, such as torrential rains and floods. These extreme weather events exacerbate the erosion of road surfaces, making road structures more susceptible to damage and thus affecting road safety and service life. Furthermore, road maintenance and repair is a long-term and costly process. To reduce maintenance costs and extend road surface life, it is necessary to assess the durability and erosion resistance of road surface materials during the design phase.

[0003] However, existing methods for evaluating the performance of road surface erosion by water flow have limitations and cannot effectively simulate the performance changes of actual road surfaces under various water flow conditions. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the defect of inaccurate performance evaluation of road materials during the scouring process in the prior art, and to provide a testing device for the dynamic water scouring performance of road materials.

[0005] The present invention solves the above-mentioned technical problems through the following technical solution:

[0006] This application provides a testing device for the dynamic water erosion performance of road materials. The testing device includes a main structure, a driving structure, a spraying structure, a support structure, a parameter detection structure, and a controller.

[0007] The controller is communicatively connected to the drive structure, the spraying structure, and the parameter detection structure.

[0008] A liquid-containing tank is formed inside the cavity of the main structure, and the spraying structure is connected to the liquid-containing tank via a pipeline.

[0009] The support structure is used to place road surface material test specimens;

[0010] The controller is used to trigger the drive structure to move the spraying structure to the target position;

[0011] The controller is also configured to trigger the drive structure to perform a corresponding drive operation based on a sent set drive command, so as to transmit the liquid in the liquid container tank through the pipeline to the spraying point of the spraying structure; and to drive the spraying structure located at the target position to perform a corresponding spraying operation on the road material test piece based on a sent set spraying command.

[0012] The parameter detection structure is used to collect the first parameter corresponding to the absence of the road material test piece on the support structure, and the second parameter corresponding to the presence of the road material test piece and completion of the spraying operation, and sends it to the controller to output the target test result characterizing the dynamic water scouring performance of the road material test piece.

[0013] Optionally, the drive structure includes a water pump;

[0014] The water pump's inlet is located on the pipeline, the water pump is connected to the liquid container tank via the pipeline, and the water pump's outlet is connected to the spraying structure via the pipeline.

[0015] One end of the pipeline is connected to the liquid container tank, and the spraying structure is located at the other end of the pipeline;

[0016] The relative positions of the spraying structure and the road material test specimen on the supporting structure meet the preset spraying conditions.

[0017] Optionally, the other end of the pipeline passes through the side wall of the main structure and is located within the cavity of the main structure; the support structure is located within the cavity of the main structure.

[0018] Optionally, the testing apparatus further includes a filter structure;

[0019] The support structure is located above the liquid container tank and maintains a certain distance from the liquid container tank;

[0020] The filter structure is disposed between the support structure and the liquid receiving tank;

[0021] The filter structure is fixed via the side wall of the main structure, and the filter structure is higher than the highest level of the liquid in the liquid container.

[0022] Optionally, the support structure includes a main structure and a test piece placement platform fixedly connected to the main structure, wherein the main structure is fixedly mounted on the main body structure;

[0023] The main structure includes a motor, a first rotating shaft, a second rotating shaft, and a force transmission rod.

[0024] One end of the first rotating shaft is connected to the motor, and the other end of the first rotating shaft is connected to one end of the second rotating shaft via the force transmission rod. The other end of the second rotating shaft is connected to the test piece placement platform.

[0025] Optionally, the test piece placement platform has several holes.

[0026] Optionally, the testing device further includes a pressure sensor, which is communicatively connected to the controller;

[0027] The pressure sensor is located on the pipeline connecting the water pump and the spraying structure. The pressure sensor is used to detect the water pressure in the pipeline and send it to the controller.

[0028] Optionally, the testing device further includes a heating element and a temperature sensor disposed in the liquid container, both of which are communicatively connected to the controller.

[0029] Optionally, the main structure is provided with an inlet and a drain at a position corresponding to the liquid container tank.

[0030] Optionally, the main structure includes a box and a door movably connected to the box, the position of the door matching the position of the supporting structure.

[0031] Based on common knowledge in the field, the above optional conditions can be combined arbitrarily to obtain various preferred embodiments of this utility model.

[0032] The significant advantages of this invention are as follows: By using a spraying structure to perform water scouring tests on pavement material test specimens placed on a supporting structure, the scouring stress of real pavement under complex conditions is simulated. Simultaneously, a parameter detection structure collects the first parameter of the support structure before the pavement material test specimen is placed and the second parameter after the test specimen is placed and the spraying operation is completed. These detected parameters are then sent to a controller, enabling effective analysis of the mass loss of the pavement material test specimen during the dynamic water scouring process. This invention significantly improves the accuracy and reliability of evaluating the scouring resistance of pavement materials by simulating the dynamic water scouring conditions experienced by actual pavements. It can more accurately reflect the scouring resistance performance of pavements in actual use, providing a scientific basis for pavement design, construction, and maintenance. The test results are closer to the actual usage conditions of pavements, further enhancing the effectiveness of the test and providing strong support for optimizing pavement material performance and extending pavement service life. Attached Figure Description

[0033] Figure 1 A schematic diagram of the structure of a testing device for the dynamic water erosion performance of road surface materials provided by this utility model;

[0034] Figure 2 A schematic diagram of the test piece placement platform provided by this utility model;

[0035] Figure 3 A schematic diagram of the appearance of a testing device for the dynamic water erosion performance of road surface materials provided by this utility model. Detailed Implementation

[0036] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein.

[0037] In this embodiment of the invention, prefixes such as "first" and "second" are used merely to distinguish different descriptive objects and do not limit the position, order, priority, quantity, or content of the described objects. The use of ordinal numbers and other prefixes to distinguish descriptive objects in this embodiment of the invention does not constitute a limitation on the described objects. The description of the described objects is found in the claims or the context of the embodiments, and the use of such prefixes should not constitute unnecessary limitations. Furthermore, in the description of this embodiment, unless otherwise stated, "multiple" means two or more.

[0038] In this embodiment of the utility model, the collection, storage, use, processing, transmission, provision, and disclosure of user personal information comply with relevant laws and regulations and do not violate public order and good morals.

[0039] like Figure 1 As shown, this embodiment provides a testing device for the dynamic water erosion performance of road materials. The testing device includes a main structure 1, a driving structure, a spraying structure 2, a support structure 3, a parameter detection structure, and a controller.

[0040] The controller is communicatively connected to the drive structure, the spraying structure 2, and the parameter detection structure;

[0041] A liquid receiving tank 4 is formed inside the cavity of the main structure 1, and the spraying structure 2 is connected to the liquid receiving tank 4 via a pipe 5.

[0042] The support structure 3 is used to place road surface material test specimens;

[0043] The controller is used to trigger the drive structure to move the spraying structure 2 to the target position;

[0044] The controller is also used to trigger the drive structure to perform a corresponding drive operation based on the sent set drive command, so as to transmit the liquid in the liquid receiving tank 4 through the pipeline to the spraying point of the spraying structure 2; and to drive the spraying structure 2 located at the target position to perform a corresponding spraying operation on the road material test piece based on the sent set spraying command.

[0045] The parameter detection structure is used to collect the first parameter corresponding to the absence of the road material test piece on the support structure 3, and the second parameter corresponding to the presence of the road material test piece and completion of the spraying operation, and send it to the controller to output the target test result characterizing the dynamic water scouring performance of the road material test piece.

[0046] In practical applications, the aforementioned pavement material test specimens can be made of asphalt.

[0047] Specifically, the controller precisely controls the operation of the drive structure, enabling the spraying structure to accurately reach the preset target position. This process not only ensures that the spraying structure can accurately align with the road material test specimen but also provides reliable positioning assurance for subsequent spraying operations. The controller is also used to trigger the drive structure to perform corresponding operations according to the set drive commands, thereby transferring the liquid in the liquid receiving tank to the spraying point of the spraying structure through pipelines. During this process, the controller can precisely regulate the operation of the drive structure to ensure the stability and reliability of liquid transmission, providing a continuous and uniform liquid supply for the spraying operation. When the spraying structure reaches the preset target position and the liquid is in place, the controller precisely drives the spraying structure located at the target position to spray the road material test specimen according to the sent set spraying commands. Throughout the spraying process, the controller precisely controls the spraying structure according to the preset drive commands and spraying commands, ensuring the accuracy of the test operation, the consistency of the test conditions, and the reliability of the operation, providing a strong guarantee for the accuracy and repeatability of the experimental results. The parameter testing mechanism first measures the weight of the support structure without the pavement material test specimen as the first parameter. Then, after placing the pavement material test specimen and completing the spraying operation, it measures the mass of the support structure again as the second parameter. After receiving the weight parameters from the two measurements, the controller calculates the mass loss of the pavement material test specimen during the spraying process by comparing the difference between the two. Based on this mass loss data, the controller can further analyze and output test results characterizing the dynamic water scouring performance of the pavement material. These test results can intuitively reflect the performance of the pavement material under dynamic water scouring conditions, providing an important reference for the quality assessment and performance optimization of pavement materials.

[0048] In a specific example, the spraying structure can move horizontally or vertically.

[0049] In a specific example, the spraying command can be set to a single spray or multiple sprays. The single spray mode is suitable for quickly assessing the scouring response of road materials in a short period of time, while multiple sprays are more suitable for simulating the environment of long-term exposure and dynamic water scouring of road materials in actual use scenarios. Through multiple sprays, the durability, stability and long-term performance changes of road materials under repeated scouring can be more comprehensively evaluated. Specifically, multiple sprays can be performed at preset time intervals, such as spraying once at a certain time interval, or multiple spraying operations can be performed continuously according to experimental requirements to simulate scouring conditions of different intensities and frequencies.

[0050] In one alternative implementation, such as Figure 1 As shown, the drive structure includes a water pump 6;

[0051] The water pump's inlet is located on the pipeline, the water pump is connected to the liquid container tank via the pipeline, and the water pump's outlet is connected to the spraying structure via the pipeline.

[0052] One end of the pipeline is connected to the liquid container tank, and the spraying structure is located at the other end of the pipeline;

[0053] The relative positions of the spraying structure and the road material test specimen on the supporting structure meet the preset spraying conditions.

[0054] Specifically, a water pump is installed on the pipeline between the liquid receiving tank and the spraying structure. The pump's inlet is connected to the liquid receiving tank via the pipeline, responsible for drawing liquid from the tank. Its outlet is connected to the spraying structure via the pipeline, providing water to the structure and ensuring that the liquid can be smoothly transported from the receiving tank to the spraying structure. By operating the pump, the water pressure in the pipeline can be adjusted, thereby precisely controlling the spraying intensity and scouring force of the spraying structure. The relative positions of the spraying structure and the road material test specimens on the supporting structure are precisely designed. Only when the positions of the two meet the preset conditions can the spraying structure effectively and uniformly scour the test specimens.

[0055] In another specific embodiment, the connection angle between the spraying structure and the pipeline is adjustable. By flexibly adjusting the spraying angle of the spraying structure, different parts of the surface of the road material specimen can be subjected to dynamic water scouring from different directions, thereby simulating the stress conditions of real road surfaces under complex traffic and natural environments, such as the impact of water flow from different directions or rain scouring generated when vehicles are driving. Through this adjustable spraying angle, the applicability of the test experiment is significantly enhanced, and the durability and stability of road materials under various actual working conditions can be evaluated more comprehensively.

[0056] In one optional embodiment, the other end of the pipeline passes through the side wall of the main structure and is located within the cavity of the main structure; the support structure is located within the cavity of the main structure.

[0057] Specifically, the other end of the pipeline enters the cavity of the main structure through the side wall and is connected to the spraying structure, while the support structure is used to place the road material test specimen and is also located inside the cavity of the main structure. Based on this layout, both the spraying structure and the support structure are located inside the cavity of the main structure, which can complete the dynamic water flushing test of the road material test specimen within the main structure, ensuring the integration and efficiency of the testing process.

[0058] In one alternative implementation, such as Figure 1 As shown, the testing device also includes a filter structure 7;

[0059] The support structure is located above the liquid container tank and maintains a certain distance from the liquid container tank;

[0060] The filter structure is disposed between the support structure and the liquid receiving tank;

[0061] The filter structure is fixed via the side wall of the main structure, and the filter structure is higher than the highest level of the liquid in the liquid container.

[0062] Specifically, within the main structural cavity, the supporting structure is positioned above the liquid-containing tank, maintaining an appropriate vertical distance between them. This ensures complete isolation between the liquid in the tank and the road material test specimen placed on the supporting structure, preventing accidental contact and guaranteeing the accuracy and reliability of the test results. During spraying, the water flow washes over the road material test specimen before flowing into the liquid-containing tank, while the spraying structure draws its water from the tank, forming a complete water circulation system for efficient water resource utilization. Simultaneously, a filter structure is fixedly connected to the side wall of the main structure between the supporting structure and the liquid-containing tank. Different connection methods can be selected based on actual needs, such as welding, bolting, or other methods. The height of the filter structure limits the maximum capacity of the liquid-containing tank. Furthermore, this filter effectively intercepts impurities washed down from the road material test specimen during spraying, preventing them from entering the tank and ensuring the liquid remains pure for subsequent recycling.

[0063] In a specific example, a filter structure is typically composed of porous materials such as filter screens, filter cloths, or filter cartridges. The pore size of these materials determines their interception capacity. When liquid flows through the filter structure, larger impurity particles are physically intercepted and cannot pass through the pores, thus remaining on the surface or inside the filter structure, ensuring that the liquid flowing back into the liquid container does not carry impurities.

[0064] In one alternative implementation, such as Figure 1 As shown, the support structure 3 includes a main structure and a test piece placement platform 8 fixedly connected to the main structure. The main structure is fixedly mounted on the main body structure 1.

[0065] The main structure includes a motor 9, a first rotating shaft 10, a second rotating shaft 11, and a force transmission rod 12.

[0066] One end of the first rotating shaft is connected to the motor, and the other end of the first rotating shaft is connected to one end of the second rotating shaft via the force transmission rod. The other end of the second rotating shaft is connected to the test piece placement platform.

[0067] Specifically, when the motor starts, the first rotating shaft rotates under the drive of the motor, and transmits the power to the second rotating shaft through the force transmission rod, thereby driving the test specimen placement platform to rotate. In this way, the spraying structure can spray every part of the road material test specimen placed on the test specimen placement platform evenly and comprehensively, achieving a uniform spraying effect, thereby improving the accuracy and consistency of the test.

[0068] In a specific example, such as Figure 1 As shown, a tension sensor 13 is installed on the force transmission rod. This tension sensor can detect the downward tension generated on the force transmission rod in real time, thereby accurately measuring the scouring and wear of the road material test piece on the test piece placement platform. During the scouring process of the moving water, as the road material test piece is scouring and worn, its mass gradually decreases. This change in mass will be directly reflected in the change of tension on the force transmission rod. By intervening in this change of tension in real time, the tension sensor can accurately record the mass loss of the road material test piece during the spraying process.

[0069] In another alternative implementation, such as Figure 1 As shown, the force transmission rod is also wrapped with a telescopic rubber tube 14. The function of the telescopic rubber tube is limited to driving the second rotating shaft to rotate, and it does not bear any tensile force. The total mass of the second rotating shaft, the test piece placement platform and the road material test piece is entirely borne by the tensile sensor.

[0070] In a specific example, when the pavement material is asphalt, different rotation speeds of the test specimen placement platform will have multiple effects on the dynamic water erosion performance test of the asphalt pavement material test specimen, mainly reflected in the realism of the simulated environment, the erosion effect, and the accuracy of the test data.

[0071] Specifically, the simulation environment is realistic: the frequency and intensity of water erosion on actual asphalt pavements vary under different traffic flows and vehicle speeds. Lower rotation speeds, such as when the motor drives the rotating shaft at a speed of 5 revolutions per second, may be closer to the frequency of water erosion on the pavement under conditions of low traffic flow and slow vehicle speed. In this case, the asphalt pavement material test specimens on the test specimen placement platform are subjected to relatively mild water erosion, which can simulate the erosion state of the pavement under low traffic pressure. Higher rotation speeds can simulate the situation when traffic is busy and vehicles are traveling at high speeds. The fast movement of vehicles will increase the speed of water flow on the pavement, increasing the erosion intensity on the pavement. The test specimen placement platform at high rotation speeds allows the asphalt pavement material test specimens to be subjected to more frequent and stronger water erosion, making the test environment closer to this actual scenario and helping to study the erosion resistance of asphalt pavements under high traffic pressure. Differences in scouring effect: The scouring effect of water sprayed by the spraying structure on asphalt pavement material test specimens varies depending on the rotation speed. At low rotation speeds, the impact force of water on asphalt pavement material test specimens is relatively small, and the scouring effect is relatively gentle. In this case, the water flow may mainly manifest as a slow erosion effect on defects such as micro-cracks and pores in the pavement. For example, after long-term low-speed scouring, it may be found that the micro-cracks on the surface of the asphalt pavement material test specimen gradually widen, but the expansion rate is slow. At high rotation speeds, the strong centrifugal force will cause the water to impact the asphalt pavement material test specimens at a higher speed, and the impact force will increase significantly. This may cause the aggregate of the asphalt pavement material test specimens to be more easily scoured, loosened, and detached, simulating the process of rapid appearance of potholes, loosening, and other defects on the pavement during severe weather such as heavy rain and heavy traffic. This allows for faster detection of the performance of asphalt pavement material test specimens under extreme scouring conditions. Accuracy of Test Data: The rotational speed of the test specimen placement platform directly affects the accuracy and reliability of the test data. When the rotational speed is stable, the dynamic water scouring conditions are relatively constant. In repeated tests, relatively stable data such as the mass loss rate can be obtained, which facilitates researchers to accurately evaluate the scouring resistance of asphalt pavement material test specimens. For example, if the test is conducted at the same rotational speed each time, the mass loss rate data of different asphalt pavement material test specimens are comparable, which can effectively analyze the performance differences of different asphalt mixtures. If the rotational speed is unstable and fluctuates, the dynamic water scouring process becomes complicated and uncontrollable, resulting in large fluctuations in test data. Such data is difficult to accurately reflect different true scouring resistance performances, which will interfere with researchers' evaluation of asphalt pavement performance and affect subsequent pavement design, construction, and maintenance decisions.

[0072] In one alternative implementation, such as Figure 1 As shown, the test piece placement platform 8 has several holes.

[0073] Specifically, due to the inherent porosity of road surface materials, water seepage may occur during testing. To ensure test accuracy, holes are provided on the test specimen placement platform to promptly drain seepage water, preventing moisture accumulation on the platform and avoiding any additional impact on the weight of the road surface material test specimen due to water accumulation, thus improving the accuracy of the test results. These holes can be of different shapes or the same shape; the specific design can be adjusted according to testing requirements and the characteristics of the road surface material test specimen.

[0074] In a specific example, such as Figure 2 As shown, there are 15 circular holes regularly distributed on the test piece placement platform.

[0075] In one alternative implementation, such as Figure 1 As shown, the testing device also includes a pressure sensor 15, which is communicatively connected to the controller;

[0076] The pressure sensor is located on the pipeline connecting the water pump and the spraying structure. The pressure sensor is used to detect the water pressure in the pipeline and send it to the controller.

[0077] Specifically, a pressure sensor detects the water pressure in the pump outlet pipe in real time and transmits the pressure data to the controller. The controller analyzes the received data based on the set water pressure value. If the received water pressure is lower than the set value, the controller automatically increases the pump power to increase the water pressure; if the received water pressure is higher than the set value, the controller decreases the pump power to reduce the water pressure. Through this dynamic adjustment mechanism, the pressure sensor and controller work together to ensure that the scouring force of the spray structure remains stable at the set value during spraying operations, thereby guaranteeing the accuracy and consistency of the test results. Furthermore, the scouring force of the spray structure can be flexibly adjusted by changing the pump power or water pressure set value according to different test scenario requirements. For example, it can simulate rainfall and water flow scouring of different intensities, thus providing more targeted and practical experimental data for dynamic water scouring tests of road materials.

[0078] In one alternative implementation, such as Figure 1 As shown, the testing device also includes a heating element 16 and a temperature sensor 17 disposed in the liquid container, and both the heating element and the temperature sensor are communicatively connected to the controller.

[0079] Specifically, the temperature sensor detects the temperature of the liquid in the liquid container in real time and transmits the detected data to the controller. The controller analyzes the liquid temperature according to the preset temperature value and controls the working state of the heating element accordingly. By heating the liquid in the liquid container and then spraying the heated liquid onto the road material test piece through the spraying structure, a high-temperature road environment is simulated, and the dynamic water erosion performance of the road material test piece under different high-temperature environments is accurately evaluated, providing reliable experimental conditions for studying the performance changes of road materials under different temperature conditions.

[0080] In a specific example, the asphalt pavement experiences elevated pavement temperature due to factors such as solar radiation, vehicle friction heat, and increased ambient temperature. During peak summer months, pavement temperatures can reach 50-70°C. Prolonged exposure to solar radiation causes the pavement to absorb a significant amount of heat. Simultaneously, vehicle friction between tires and the pavement generates heat, and the high ambient temperature further contributes to this temperature rise. This high temperature alters the physical properties of the asphalt, reducing its viscosity and softening it, thus affecting the pavement's erosion resistance. A high-temperature pavement environment typically refers to a pavement temperature significantly higher than normal. In hot summer regions, pavement temperatures can reach above 50°C, and in extreme cases, even approach 70°C. Under these conditions, the erosive damage caused by flowing water is exacerbated because the high temperature weakens the bond between the asphalt and aggregates, making it easier for water to loosen and carry away the aggregates, accelerating pavement damage. Therefore, simulating high-temperature pavement environments is crucial for accurately assessing the dynamic water erosion performance of asphalt pavements in actual use.

[0081] In a specific example, before the test, water is added to the liquid container tank. The heating element is then activated via the control system to heat the water in the tank to the required temperature. Once the water temperature rises, it comes into contact with the asphalt pavement material specimen placed on the test specimen platform. Heat is transferred from the hot water to the pavement material specimen, thus placing the specimen in a high-temperature environment, simulating the condition of a real high-temperature pavement. During the test, the power of the heating element can be precisely adjusted via the control system to maintain a stable water temperature, thereby stably simulating the high-temperature pavement environment. In some test scenarios, heating and stabilizing the water temperature at 60°C allows for continuous simulation of the dynamic water scouring of the pavement at the corresponding high temperature. This allows observation of the performance changes of the asphalt pavement material specimen under these conditions, providing effective data support for studying the performance of asphalt pavement under high-temperature dynamic water scouring.

[0082] In one alternative implementation, such as Figure 3 As shown, the main structure is provided with an inlet 18 and an outlet 19 at the position corresponding to the liquid container tank.

[0083] Specifically, by setting the inlet and outlet ports at the corresponding positions of the liquid container in the main structure, the liquid in the liquid container can be easily replenished and discharged, thereby flexibly adjusting the storage capacity of the liquid in the liquid container to meet the usage requirements under different testing scenarios.

[0084] In one alternative implementation, such as Figure 3 As shown, the main structure includes a box 20 and a door 21 movably connected to the box, and the position of the door is matched with the position of the supporting structure.

[0085] Specifically, the door is installed on the housing via a movable connection to facilitate entry and exit between the inside and outside of the housing. Its position precisely corresponds to the position of the support platform, allowing the operator to easily place or remove road material test specimens from the support structure, thus improving operational convenience and effectively reducing safety risks caused by improper operation.

[0086] In a specific example, the door can be designed to open manually, electrically, or automatically by sensor.

[0087] In another specific example, the gate can also be made of transparent materials, such as high-strength transparent glass, so that operators can directly observe the condition of the road material test specimen without opening the gate, thereby better monitoring the testing process and promptly detecting abnormalities.

[0088] In a specific example, when the road material test specimen is not placed, the tensile sensor collects the total weight of the second rotating shaft and the test specimen placement platform as G. z Before performing the dynamic water erosion performance test on the asphalt pavement material test specimens, the specimens were first immersed in warm water for 10 minutes, then placed on the test specimen placement platform. After the specimens were placed on the platform, the tensile sensor collected the initial weight value G0. Water was then injected into the liquid container tank through the inlet, controlling the water level to not exceed the filter plate. The heating element was then activated by the control system to heat the water in the liquid container tank to the required temperature, and the spray structure was adjusted to the required test angle. The control system pre-set the test duration, data acquisition cycle, and water pressure. After starting the motor and water pump, the pump power was adjusted according to the water pressure sensor reading until the water pressure reached the required value. The motor rotated the test specimen placement platform at a speed of 5 revolutions per second. When one data acquisition cycle was completed, the control system turned off the water pump. The motor continued to work for 10 seconds before being turned off. After the test specimen placement platform stabilized, the control system collected the tensile force value G1 from the tensile sensor and calculated the mass loss rate for the first cycle as (G1-G0) / (G0-G zAfter the calculation is completed, the control system begins the second cycle test. When the set n cycles are completed, the calculated mass loss rate is (G). n -G0) / (G0-G z After the test, the liquid container was drained through its outlet. The control system generated a curve showing the relationship between the mass loss rate and the test cycle time based on the test data, thereby evaluating the dynamic water erosion performance of the pavement material test specimen.

[0089] Before conducting dynamic water erosion performance tests on asphalt pavement material specimens, the specimens are first soaked in warm water for 10 minutes. This operation is of great significance for simulating the real environment, ensuring test accuracy, and reflecting material performance. First, it can simulate the saturated state of real road surfaces: In actual use, asphalt pavements inevitably come into contact with water. Rainfall and water accumulation can cause the pavement to become saturated, and water will gradually seep into the interior of the asphalt pavement material specimen. Soaking the asphalt pavement material specimen in warm water beforehand can simulate this realistic saturated state, making the testing environment closer to reality. When the asphalt pavement material specimen is saturated, the water weakens the adhesion between the asphalt and aggregate, making the pavement more susceptible to damage under the scouring action of flowing water. Soaking the asphalt pavement material specimen allows the test to more accurately reflect the resistance of the asphalt pavement material specimen to flowing water scouring under actual saturated conditions. Second, it can accelerate the testing process and improve testing efficiency: If the asphalt pavement material specimen is directly subjected to flowing water scouring without soaking, water needs a certain amount of time to fully penetrate the interior of the asphalt pavement material specimen, which will prolong the time it takes to reach a stable state. Soaking for 10 minutes beforehand allows the interior of the asphalt pavement material specimen to quickly reach a certain humidity level, making it more resistant to flowing water scouring. At the start of the test, it can directly enter a testing phase that better reflects actual conditions, reducing the overall testing time and improving testing efficiency. Time cost is a crucial factor when studying the erosion resistance of different asphalt mixtures. By soaking asphalt pavement material specimens, multiple tests can be completed in a shorter time, accelerating the research process. Finally, it can also ensure the accuracy and comparability of test results: a uniform soaking operation ensures consistent initial conditions for each test, improving the accuracy and comparability of test results. For different asphalt pavement material specimens, if some are soaked and some are not, or if the soaking time is different, the test results will be greatly affected by the different initial humidity conditions during the dynamic water erosion test, making it difficult to accurately judge the differences in the erosion resistance of different asphalt pavement material specimens. Specifying a uniform soaking time of 10 minutes can eliminate this interference factor, making the test results more reliable and facilitating researchers to compare and analyze the performance of different asphalt pavement material specimens, providing a more scientific basis for the selection and design of pavement materials.

[0090] After the data acquisition cycle ends, the motor continues to operate for 10 seconds. This is primarily to ensure the accuracy of the test data, simulate more realistic working conditions, and guarantee stable equipment operation. Ensuring test data accuracy is crucial because after the water pump is turned off at the end of the data acquisition cycle, some flowing water remains on the test specimen placement platform. Furthermore, the platform and rotating shaft retain some inertia after high-speed operation. If the motor stops immediately, the platform will decelerate rapidly due to loss of power, and the remaining water will flow erratically due to inertia, interfering with the tensile sensor's measurement. This leads to deviations in the collected tensile data, affecting the accuracy of the mass loss rate calculation and preventing the test results from accurately reflecting the dynamic water erosion performance of the asphalt pavement material test specimen. Allowing the motor to continue operating for 10 seconds allows the platform to decelerate smoothly, giving the remaining water sufficient time to drain, reducing water interference, and enabling the tensile sensor to accurately measure the weight of the platform after stabilization. This ensures the accuracy and reliability of the collected tensile data, providing strong support for subsequent accurate calculation of the mass loss rate and evaluation of the dynamic water erosion performance of the asphalt pavement material test specimen. Simulating more realistic working conditions: In actual road environments, the water erosion caused by vehicle movement does not stop instantly. The road surface continues to be affected by the subsequent water flow even after the vehicle leaves. The motor continues to operate for 10 seconds to simulate the subsequent stress on the road surface after the water erosion ends. This makes the testing process closer to real-world scenarios. This simulation allows the test results to better reflect the actual performance changes of the road surface after water erosion, providing more valuable data for road engineering design, construction, and maintenance. For example, when studying the erosion resistance of different types of asphalt mixtures, simulated real-world test results can help engineers more accurately select materials suitable for different road conditions, improving road service life and safety.

[0091] The conditions set for the n cycles during the test may not be consistent. In actual testing, to comprehensively study the performance changes of asphalt pavement material test specimens under different dynamic water scouring conditions, some conditions may be adjusted, such as changing the water temperature, water pressure, or the angle of the spray structure. This allows for the exploration of the influence of different factors on the dynamic water scouring performance of asphalt pavement material test specimens. If only a single fixed condition is maintained during testing, the information obtained will be limited and difficult to reflect the true performance of asphalt pavement in complex and variable real-world environments. For example, three sets of experiments are set up with water temperatures of 30℃, 50℃, and 70℃, and water pressures of 0.2MPa, 0.4MPa, and 0.6MPa, respectively. Each set of experiments is tested for n cycles. By comparing the final tensile force G values ​​of different sets of experiments... nThe calculated mass loss rate allows analysis of the differences in the resistance to dynamic water erosion of asphalt pavement under different water temperature and pressure conditions, thus establishing the relationship between the mass loss rate and water temperature and pressure. Although this method does not consider the mass loss during the intermediate process, through multiple sets of comparative experiments, it can still reflect the overall trend of the influence of different conditions on the final result.

[0092] The reasons for setting test cycles instead of a fixed total duration include: First, setting cycles allows for more detailed observation of the performance changes of asphalt pavement during dynamic water scouring. As the cycle progresses, it's possible to observe how the mass loss rate gradually changes—whether it exhibits linear, exponential, or other trends. This dynamic observation is crucial for a deeper understanding of the scouring resistance of asphalt pavement. Second, at the end of each cycle, the conditions for subsequent cycles can be adjusted based on the test results of the previous cycle, making the test more targeted. For example, if the mass loss rate is found to be increasing too rapidly in a certain cycle, the water pressure can be appropriately reduced in subsequent cycles to observe the impact of this adjustment on the mass loss rate. Finally, setting cycles also improves the repeatability of the experiment and the accuracy of the data. If a fixed total duration is used, and an unexpected situation occurs during the test that causes an interruption, the entire experiment may need to be restarted. However, with a cycle-based approach, if a problem occurs in a certain cycle, only that cycle needs to be retested without affecting the data from other cycles, thereby improving experimental efficiency and data reliability.

[0093] In this utility model, the programs involved are all means of implementing the functions of the controller, and the specific writing, running mechanism and software implementation of the programs are not within the protection scope of this utility model.

[0094] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this disclosure, but all such changes and modifications fall within the scope of protection of this utility model.

Claims

1. An apparatus for testing the dynamic water scour performance of a pavement material, characterized in that, The test device comprises a main body structure, a driving structure, a spraying structure, a supporting structure, a parameter detection structure and a controller; The controller is in communication connection with the driving structure, the spraying structure and the parameter detection structure; A liquid containing groove is formed in the cavity of the main body structure, and the spraying structure is in communication with the liquid containing groove via a pipeline; The supporting structure is used for placing the road material test piece; The controller is used for triggering the driving structure to drive the spraying structure to move to a target position; The controller is also used for triggering the driving structure to perform corresponding driving operation based on the sent setting driving instruction, so as to transmit the liquid in the liquid containing groove to the spraying position of the spraying structure via the pipeline; And the spraying structure located at the target position drives the spraying operation on the road material test piece based on the sent setting spraying instruction; The parameter detection structure is used for collecting a first parameter corresponding to the road material test piece not placed on the supporting structure and a second parameter corresponding to the road material test piece after the spraying operation is performed, and sending the parameters to the controller to output a target test result representing the hydrodynamic scouring performance of the road material test piece.

2. The test device of claim 1, wherein, The driving structure comprises a water pump; The water inlet of the water pump is arranged on the pipeline, the water pump is in communication with the liquid containing groove via the pipeline, and the water outlet of the water pump is in communication with the spraying structure via the pipeline; One end of the pipeline is in communication with the liquid containing groove, and the spraying structure is arranged at the other end of the pipeline; The relative position of the spraying structure and the road material test piece on the supporting structure satisfies a preset spraying condition.

3. The test device of claim 2, wherein, The other end of the pipeline is arranged in the side wall of the main body structure and located in the cavity of the main body structure; and the supporting structure is arranged in the cavity of the main body structure.

4. The test device of claim 3, wherein, The test device further comprises a filtering structure; The supporting structure is arranged above the liquid containing groove and maintains a certain spacing with the liquid containing groove; The filtering structure is arranged between the supporting structure and the liquid containing groove; The filtering structure is fixed via the side wall of the main body structure, and the filtering structure is higher than the highest position of the liquid in the liquid containing groove.

5. The test device of claim 2, wherein, The supporting structure comprises a main structure, a test piece placing table fixedly connected with the main structure, and the main structure is fixedly arranged on the main body structure; The main structure comprises a motor, a first rotating shaft, a second rotating shaft and a force transmission rod; One end of the first rotating shaft is connected with the motor, the other end of the first rotating shaft is connected with one end of the second rotating shaft via the force transmission rod, and the other end of the second rotating shaft is connected with the test piece placing table.

6. The test device of claim 5, wherein, A plurality of holes are arranged on the test piece placing table.

7. The test device of claim 2, wherein, The test device further comprises a pressure sensor in communication connection with the controller; The pressure sensor is arranged on the pipeline in communication with the spraying structure, and the pressure sensor is used for detecting the water pressure in the pipeline and sending the water pressure to the controller.

8. The test device of claim 1, wherein, The testing device further comprises a heating element and a temperature sensor arranged in the liquid accommodating groove, and the heating element and the temperature sensor are in communication connection with the controller.

9. The test device of claim 1, wherein, The main body structure is provided with a water inlet and a water outlet at a position corresponding to the liquid accommodating groove.

10. The test device of any one of claims 1-9, wherein, The main body structure comprises a box body and a door body movably connected to the box body, and the position of the door body is matched with the position of the supporting structure.

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