High-temperature anti-rutting deformation performance testing mechanism

Abstract

The utility model provides a high-temperature anti-rutting deformation performance testing mechanism which comprises a testing device, an environment temperature and humidity control device, a loading speed and load control device and a data acquisition and analysis device, and the testing device is used for acquiring anti-rutting deformation performance data of an asphalt test piece; the environment temperature and humidity control device is used for adjusting the temperature and humidity of the surrounding environment of the asphalt test piece, and the loading speed and load control device is used for applying continuous load to the asphalt test piece so as to simulate performance tests under different traffic load conditions; the data acquisition and analysis device is used for acquiring, processing and analyzing the anti-rutting deformation performance data so as to evaluate the high-temperature stability of the asphalt test piece. The high-temperature anti-rutting deformation performance testing mechanism realizes comprehensive evaluation of the anti-rutting deformation performance of the asphalt test piece under a high-temperature condition, and has important significance for improving the engineering quality of a pavement prepared from the asphalt test piece.

Description

A high-temperature resistance to rutting deformation testing mechanism Technical Field

[0001] This utility model relates to the field of road engineering material performance testing, and in particular to a high-temperature resistance to rutting deformation testing mechanism. Background Technology

[0002] Existing testing methods for resistance to rutting deformation mostly rely on testing methods for hot asphalt mixtures. However, due to the ease of construction and environmental friendliness of cold-mixed and cold-laid emulsified asphalt mixtures, specialized testing methods and equipment are needed to accurately evaluate their high-temperature stability.

[0003] The "Test Procedures for Asphalt and Asphalt Mixtures in Highway Engineering" (T0755 and T0756) contain specimen preparation and testing methods for rutting deformation tests of slurry mixtures. However, these methods are not directly applicable to the performance testing of cold-mixed, cold-laid emulsified asphalt mixtures in certain aspects. The specific reasons are as follows: First, the specimen molding process lacks a compaction step, resulting in voids in the specimens, which is inconsistent with actual engineering practices, as cold-mixed, cold-laid emulsified asphalt mixtures undergo compaction with a road roller after paving. Second, the test temperature significantly affects the rutting deformation results of the mixture, and existing methods... The standard does not include a temperature control device for the test equipment, which may lead to deviations in the test results. Furthermore, the test cannot be conducted under high-temperature conditions (such as 60°C). Thirdly, the testing equipment cannot be adjusted in terms of loading speed and load settings. Fourthly, the standard requires the sample to be removed after 1000 rolling cycles for the rutting deformation test, and then the width and rutting depth of the sample after rolling are measured. However, there is no clear measurement method, and the data changes of sample width and rutting depth during rolling cannot be dynamically monitored. At the same time, the sample size may be affected during the sample removal process. All of these factors will affect the accuracy of the test results.

[0004] Therefore, there is an urgent need for a high-temperature resistance to rutting deformation testing mechanism to solve the above-mentioned technical problems. Summary of the Invention

[0005] The purpose of this invention is to provide a high-temperature rutting resistance deformation performance testing mechanism to solve the technical problem of low accuracy in testing the high-temperature rutting resistance performance of cold-mixed and cold-laid emulsified asphalt mixtures by traditional testing mechanisms.

[0006] To solve the above-mentioned technical problems, this utility model provides a high-temperature resistance to rutting deformation testing mechanism, comprising:

[0007] The testing device is used to obtain data on the resistance to rutting deformation of asphalt specimens.

[0008] An environmental temperature and humidity control device, mechanically connected to the testing device, is used to regulate the temperature and humidity of the environment surrounding the asphalt specimen;

[0009] The loading speed and load control device is mechanically connected to the testing device and is used to simulate the performance testing of asphalt specimens under different traffic load conditions.

[0010] The data acquisition and analysis device is electrically connected to the testing device and is used to collect and analyze data on resistance to rutting deformation.

[0011] Preferably, the high-temperature rutting resistance testing mechanism also includes a compaction device, which is used to compact the emulsified asphalt mixture to be tested in order to obtain asphalt specimens.

[0012] Preferably, the compaction device includes a compaction mold, which includes a compaction base plate and a compaction side frame, and the compaction side frame is detachably connected to the compaction base plate.

[0013] Preferably, the compaction device further includes a compaction roller assembly, which includes a compaction roller, a connecting rod, and a compaction handle. The connecting rod is fitted into the shaft hole of the compaction roller through an interference fit, and the compaction handle is fixedly connected to both ends of the connecting rod.

[0014] Preferably, the length of the compaction wheel is less than the inner dimension of the compaction side frame that is parallel to the length direction of the compaction wheel.

[0015] Preferably, the testing device includes a load plate, a rolling wheel, a wheel controller, and a rolling frequency regulator. The load plate is placed on the rolling wheel, the wheel controller is connected to the rolling wheel via a drive shaft, and the rolling frequency regulator is electrically connected to the wheel controller.

[0016] Preferably, the testing device also includes multiple laser monitors and a laser detection regulator, each laser monitor being electrically connected to the laser detection regulator. The laser monitors are used to measure the rut depth and lateral deformation of the asphalt specimen.

[0017] Preferably, the environmental temperature and humidity control device includes a warm air heater, an electric fan, a temperature and humidity preset and real-time panel, a temperature regulator and a humidity regulator, wherein the warm air heater and the electric fan are electrically connected to the temperature regulator, and the temperature and humidity preset and real-time panel are electrically connected to the temperature regulator and the humidity regulator, respectively.

[0018] Preferably, the loading speed and load control device includes a servo motor, a transmission mechanism, a loading plate, a load sensor, a speed sensor, and a control unit. The servo motor is connected to the input end of the transmission mechanism via a coupling, and the output end of the transmission mechanism is connected to the loading plate. The load sensor is mounted on the loading plate, and the speed sensor is mounted on the transmission mechanism.

[0019] The control unit is electrically connected to the servo motor, load sensor, and speed sensor, respectively.

[0020] Preferably, the data acquisition and analysis device includes a wireless transmission unit and an analysis unit. The wireless transmission unit is electrically connected to the testing device, the environmental temperature and humidity control device, and the control unit, respectively, and the analysis unit is electrically connected to the wireless transmission unit.

[0021] The beneficial effects of this invention are as follows: Unlike existing technologies, this invention provides a high-temperature rutting resistance testing mechanism, including a testing device, an environmental temperature and humidity control device, a loading speed and load control device, and a data acquisition and analysis device. The testing device is used to acquire rutting resistance data of asphalt specimens; the environmental temperature and humidity control device is used to adjust the temperature and humidity of the environment surrounding the asphalt specimens; the loading speed and load control device is used to apply continuous loads to the asphalt specimens to simulate performance testing under different traffic load conditions; and the data acquisition and analysis device is used to collect, process, and analyze the rutting resistance data to evaluate the high-temperature stability of the asphalt specimens. This high-temperature rutting resistance testing mechanism organically combines the testing device, environmental temperature and humidity control device, loading speed and load control device, and data acquisition and analysis device. By simultaneously considering the influence of environmental factors, load factors, and the material's own properties, it achieves a comprehensive evaluation of the rutting resistance performance of asphalt specimens under high-temperature conditions, which is of great significance for improving the quality of pavement engineering prepared from asphalt specimens. Attached Figure Description

[0022] Figure 1 is a structural block diagram of the high-temperature resistance to rutting deformation test mechanism provided in an embodiment of the present invention;

[0023] Figure 2A is a top view of the compaction base plate of the compaction mold in the high-temperature anti-rutting deformation performance testing mechanism provided in this embodiment of the present invention;

[0024] Figure 2B is a side view of the compaction side frame of the compaction mold in the high-temperature anti-rutting deformation performance testing mechanism provided in this embodiment of the present invention;

[0025] Figure 3A is a top view of the compaction roller assembly in the high-temperature rutting resistance deformation test mechanism provided in this embodiment of the present invention;

[0026] Figure 3B is a side view of the compaction roller assembly in the A1A2 direction of the high temperature resistance to rutting deformation test mechanism provided in this embodiment of the present invention;

[0027] Figure 4A is a top view of the testing device in the high-temperature rutting resistance deformation testing mechanism provided in this embodiment of the present invention.

[0028] Figure 4B is a side view of the testing device in the high-temperature rutting deformation resistance testing mechanism provided in this embodiment of the present invention in the A3A4 direction;

[0029] Figure 5 is a schematic diagram of the environmental temperature and humidity control device in the high-temperature anti-rutting deformation performance testing mechanism provided in this embodiment of the present invention.

[0030] Figure 6 is a schematic diagram of the loading speed and load control device in the high-temperature anti-rutting deformation performance testing mechanism provided in this embodiment of the present invention.

[0031] Figure 7 is a schematic diagram of the data acquisition and analysis device in the high-temperature rutting deformation resistance testing mechanism provided in this embodiment of the present invention.

[0032] In the attached diagram: 100—High-temperature rutting resistance testing mechanism; 10—Compaction device; 11—Compaction mold; 112—Compaction side frame; 111—Compaction base plate; 12—Compaction roller assembly; 121—Compaction wheel; 122—Connecting rod; 123—Compaction handle; 20—Testing device; 21—Mixed material specimen placement area; 22—Specimen fixing device; 23—Laser monitor; 24—Rolling wheel; 25—Loading plate; 26—Wheel controller; 27—Drive shaft; 28—Rolling frequency regulator. 29—Laser detection and adjustment instrument; 30—Ambient temperature and humidity control device; 31—Warm air heater; 32—Electric fan; 33—Temperature and humidity preset and real-time panel; 34—Temperature regulator; 35—Hygrometer; 40—Loading speed and load control device; 41—Servo motor; 42—Transmission mechanism; 43—Loading plate; 44—Load sensor; 45—Speed ​​sensor; 30—Ambient temperature and humidity control device; 50—Data acquisition and analysis device; 51—Wireless transmission unit; 52—Analysis unit. Detailed Implementation

[0033] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0034] The purpose of this invention is to provide a high-temperature rutting resistance testing mechanism for cold-mixed and cold-laid emulsified asphalt mixtures. This testing mechanism can simulate the deformation of actual pavements under high-temperature conditions and uses non-contact measurement technology to improve testing accuracy. Simultaneously, this testing mechanism can accurately evaluate the stability of the mixture under high-temperature conditions, which is of great significance for improving the quality of cold-mixed and cold-laid emulsified asphalt mixture pavement engineering.

[0035] The technical solution of this application will now be described in conjunction with specific embodiments.

[0036] Please refer to Figure 1, which is a structural block diagram of the high-temperature rutting resistance performance testing mechanism 100 provided in this embodiment of the present invention. The present invention provides a high-temperature rutting resistance performance testing mechanism 100, including a testing device 20, an environmental temperature and humidity control device 30, a loading speed and load control device 40, and a data acquisition and analysis device 50. The testing device 20 is used to acquire rutting resistance performance data of asphalt specimens; the environmental temperature and humidity control device 30 is used to adjust the temperature and humidity of the environment surrounding the asphalt specimens; the loading speed and load control device 40 is used to apply continuous loads to the asphalt specimens to simulate performance tests under different traffic load conditions; and the data acquisition and analysis device 50 is used to collect, process, and analyze the rutting resistance performance data to evaluate the high-temperature stability of the asphalt specimens.

[0037] In this invention, the high-temperature resistance to rutting deformation test mechanism 100 also includes a compaction device 10, which is used to compact the emulsified asphalt mixture to be tested in order to obtain asphalt specimens.

[0038] Please refer to Figures 2A and 2B. The compaction device 10 includes a compaction mold 11, which includes a compaction base plate 111 and a compaction side frame 112. The bottom of the compaction side frame 112 is hollowed out, and the compaction side frame 112 is detachably connected to the compaction base plate 111. The compaction side frame 112 and the compaction base plate 111 are assembled to form a compaction mold 11 with a groove, which is used to fill the cold-mixed and cold-laid emulsified asphalt mixture.

[0039] Please refer to Figures 3A to 3B. The compaction device 10 also includes a compaction roller assembly 12. The compaction roller assembly 12 includes a compaction roller 121, a connecting rod 122, and a compaction handle 123. The connecting rod 122 is fitted into the shaft hole of the compaction roller 121 through an interference fit. The compaction handle 123 is fixedly connected to both ends of the connecting rod 122.

[0040] Specifically, the length of the compaction wheel 121 (its dimension along its cylindrical axis) is smaller than the inner dimension of the compaction side frame 112 parallel to the length direction of the compaction wheel 121. In this case, when the length of the compaction wheel 121 is smaller than the corresponding inner dimension of the compaction side frame 112, the compaction wheel 121 can roll freely within the compaction side frame 112 and can more comprehensively compact the asphalt mixture within the compaction side frame 112, thereby ensuring that the quality of the asphalt specimens meets the requirements.

[0041] In this embodiment, the self-weight of the compaction wheel 121 is 100N.

[0042] Specifically, the process for preparing asphalt specimens using the compaction device 10 is as follows:

[0043] First, according to the designed mix proportion (there are many mix proportions depending on the application), emulsified asphalt, aggregates, fillers and additives are mixed evenly in a controlled temperature and humidity environment to form an asphalt mixture. The prepared asphalt mixture is then poured into an asphalt mixture molding mold and the surface is smoothed using a scraper.

[0044] Next, the operator holds the compaction handle 123 and places the compaction wheel 121 on the surface of the asphalt mixture. By pushing the compaction handle 123 back and forth, the compaction wheel 121 rolls on the asphalt mixture. During the rolling process, the gravity of the compaction wheel 121 and the rolling friction will compact the asphalt mixture. The rolling operation is repeated to ensure that the asphalt mixture in all parts of the compaction mold 11 is fully compacted until the surface of the asphalt mixture becomes smooth and dense, reaching the required compaction degree standard. When the asphalt mixture reaches the specified compaction degree and shape requirements, the preparation of the asphalt specimen is completed.

[0045] Next, the compaction side frame 112 and the compaction base plate 111 are disassembled and separated, and the prepared asphalt specimen is carefully removed from the mold to avoid damaging the asphalt specimen.

[0046] Finally, the compacted sample is placed in a 60℃ oven and dried to constant weight, generally for no less than 16 hours.

[0047] In this invention, the testing device 20 includes an intelligent rut depth module and a lateral deformation testing module. The intelligent rut depth module uses laser or infrared non-contact measurement technology to automatically measure the rut depth of the asphalt sample under high-temperature conditions. The lateral deformation testing module uses laser or infrared non-contact measurement technology to monitor the lateral deformation of the sample in real time.

[0048] Referring to Figures 4A and 4B, the testing device 20 includes a load plate 25, a rolling wheel 24, a wheel controller 26, and a rolling frequency regulator 28. The load plate 25 is placed on the rolling wheel 24. The wheel controller 26 is connected to the rolling wheel 24 via a drive shaft, and the rolling frequency regulator 28 is electrically connected to the wheel controller 26. The testing device 20 also includes multiple laser monitors 23 and a laser detection regulator 29. Each laser monitor 23 is electrically connected to the laser detection regulator 29. The laser monitors 23 are used to measure the rut depth and lateral deformation of the asphalt specimen.

[0049] In this embodiment, there are six laser monitors 23, which can measure the rut depth and lateral deformation at the top, middle and bottom of the asphalt specimen, and process the average value.

[0050] Specifically, the process of obtaining data on the resistance to rutting deformation of asphalt specimens using testing device 20 is as follows:

[0051] First, the asphalt specimen is fixed to the mixture specimen placement area 21 using the specimen fixing assembly; at the same time, check whether each component of the testing device 20 is working properly, including the load plate 25, the rolling wheel 24, the wheel controller 26, the rolling frequency regulator 28, the laser monitor 23 and the laser detection regulator 29, etc., to ensure that the connection between them is correct and stable, and that each instrument has been calibrated and initialized.

[0052] Secondly, according to the experimental requirements, the compaction frequency of the compaction wheel 24 is set using the compaction frequency regulator 28. This frequency determines the number of times the compaction wheel 24 compacts the asphalt specimen per unit time; different frequencies may have different effects on the rutting deformation of the asphalt specimen. Simultaneously, a load-bearing plate 25 of appropriate weight is placed on the compaction wheel 24 as needed to simulate the load on the road surface from vehicles in actual traffic conditions. The weight of the load-bearing plate 25 can be adjusted according to actual conditions, generally taking into account factors such as the road's design load and traffic flow.

[0053] Next, the wheel controller 26 is activated, driving the compaction wheel 24 via the drive shaft to begin compacting the asphalt specimen. The compaction wheel 24 rolls back and forth on the surface of the asphalt specimen at a set frequency, simulating the compaction effect of a vehicle on the road surface. During the compaction process, the wheel controller 26 precisely controls the movement of the compaction wheel 24 to ensure the uniformity and stability of the compaction.

[0054] Next, while the roller 24 compacts the asphalt specimen, six laser monitors 23 begin operation. They measure the rut depth and lateral deformation at three locations on the asphalt specimen: the top, middle, and bottom. By emitting and receiving laser signals, the laser monitors 23 accurately measure the surface deformation of the asphalt specimen during compaction. Specifically, for rut depth measurement, the laser monitors 23 measure the depth of the grooves formed on the surface of the asphalt specimen after compaction; for lateral deformation measurement, the laser monitors 23 detect the dimensional changes of the asphalt specimen in the lateral direction.

[0055] Finally, the laser monitor 23 transmits the measured data to the laser detection and adjustment instrument 29 in real time. The laser detection and adjustment instrument 29 processes this data, first calculating the average values ​​of the rut depth and lateral deformation at the upper, middle, and lower positions, and then recording these average values ​​as the rut depth and lateral deformation data of the asphalt specimen under the current compaction conditions. These data reflect the asphalt specimen's resistance to rutting deformation under a certain load and compaction frequency.

[0056] Furthermore, to improve the accuracy and reliability of the data, the above measurement process is usually repeated under different rolling times or rolling cycles to obtain multiple sets of rut depth and lateral deformation data. Analysis of this data allows us to understand the variation of the asphalt specimen's resistance to rutting deformation at different rolling stages, and thus evaluate the asphalt specimen's resistance to rutting deformation. For example, curves showing the variation of rut depth and lateral deformation with rolling time or rolling cycles can be plotted, and the trend of the curves can be observed to determine the quality of the asphalt specimen's resistance to rutting deformation.

[0057] Please refer to Figure 5. Since the ambient temperature and humidity have a certain impact on the test results, and in order to test the rut deformation under high temperature conditions, an ambient temperature and humidity control device 30 needs to be set up. The ambient temperature and humidity control device 30 can simulate the conditions of the actual road surface in the high temperature environment of summer. The ambient temperature and humidity control device 30 is mechanically connected to the test device 20. The ambient temperature and humidity control device 30 includes a heater 31, a fan 32, a temperature and humidity preset and real-time panel 33, a temperature regulator 34, and a humidity regulator 35. The heater 31 and the fan 32 are electrically connected to the temperature regulator 34, and the temperature and humidity preset and real-time panel 33 is electrically connected to the temperature regulator 34 and the humidity regulator 35, respectively.

[0058] Specifically, the ambient temperature and humidity control device 30 adjusts the temperature of the environment around the asphalt specimen to 40℃~80℃ and the relative humidity to 40%~60%.

[0059] Specifically, the process of adjusting the temperature of the environment surrounding the asphalt specimen using the ambient temperature and humidity control device 30 is as follows:

[0060] First, the desired ambient temperature is set via the temperature and humidity preset and real-time panel 33. For example, when testing rut deformation under high-temperature conditions, the temperature can be set to a value between 40℃ and 80℃. This panel transmits the set temperature signal to the temperature regulator 34.

[0061] Secondly, the temperature regulator 34 controls the operating status of the heater 31 based on the received set temperature signal. When the ambient temperature is lower than the set value, the temperature regulator 34 will activate the heater 31 to generate heat and raise the ambient temperature. At the same time, the temperature regulator 34 will also adjust the heating power of the heater 31 based on the real-time monitored ambient temperature (obtained through temperature and humidity presets and the real-time panel 33) to ensure that the ambient temperature remains stable near the set value.

[0062] Specifically, during the temperature regulation process, the fan 32 will start to promote air circulation. This helps to distribute the heat generated by the warm air heater 31 evenly in the environment around the asphalt specimen, avoiding localized excessively high or low temperatures, thereby ensuring the uniformity of the temperature throughout the testing environment.

[0063] Specifically, the process of adjusting the humidity of the environment surrounding the asphalt specimen using the ambient temperature and humidity control device 30 is as follows:

[0064] First, set the ambient relative humidity on the temperature and humidity preset and real-time panel 33, generally between 40% and 60%. The panel then transmits the set humidity signal to the humidity meter 35.

[0065] Secondly, the humidifier 35 controls the operation of relevant components to adjust the humidity based on the received set humidity signal and the real-time humidity information of the environment (also obtained through temperature and humidity preset and real-time panel 33). If the ambient humidity is lower than the set value, the humidifier 35 may start the humidifier to increase the ambient humidity; if the ambient humidity is higher than the set value, the humidifier 35 may take some measures to reduce the humidity, such as strengthening ventilation (the operation of the fan 32 also helps to evenly distribute and regulate the humidity).

[0066] Furthermore, the temperature and humidity preset and real-time panel 33 monitors the ambient temperature and humidity in real time and feeds this information back to the temperature regulator 34 and humidity regulator 35. Based on the feedback information, the regulators continuously adjust the operating status of the heater 31, fan 32, and any possible humidification or dehumidification equipment to maintain the ambient temperature and humidity within the set range, ensuring stable temperature and humidity conditions in the test environment, thereby reducing the impact of ambient temperature and humidity changes on the test results of the asphalt specimen's resistance to rutting deformation.

[0067] In this embodiment, the loading speed and load control device 40 is mechanically connected to the testing device 20. It uses a servo motor 41 to control the movement of the loading plate 43 to apply continuous load to the asphalt specimen in order to simulate the performance test under different traffic load conditions. The loading speed of the loading speed and load control device 40 is 0.1~10mm / min, and the load range is 10~2000kN.

[0068] Please refer to Figure 6. The loading speed and load control device 40 includes a servo motor 41, a transmission mechanism 42, a loading plate 43, a load sensor 44, a speed sensor 45, and a control unit. The servo motor 41 is connected to the input end of the transmission mechanism 42 via a coupling. The output end of the transmission mechanism 42 is connected to the loading plate 43. The load sensor 44 is mounted on the loading plate 43, and the speed sensor 45 is mounted on the transmission mechanism 42.

[0069] The control unit is electrically connected to the servo motor 41, the load sensor 44, and the speed sensor 45.

[0070] Specifically, the servo motor 41 is the power source of the entire device, converting electrical energy into mechanical energy to power the movement of the loading plate 43. A coupling connects the servo motor 41 and the input end of the transmission mechanism 42, transmitting torque. The transmission mechanism 42 transmits the power and motion of the servo motor 41 to the loading plate 43, enabling it to move at a set speed and direction. The loading plate 43 directly contacts the cold-mixed, cold-laid emulsified asphalt mixture sample being tested, applying a load to the sample. The movement of the loading plate 43 and the applied force simulate the effect of continuous traffic load on the road surface, causing the sample to deform accordingly, thus testing its high-temperature rutting resistance. A load sensor 44 is mounted on the loading plate 43 to measure the load applied to the sample in real time. It converts the sensed load physical quantity into an electrical signal and transmits it to the control unit. A speed sensor 45 is mounted on the transmission mechanism 42 to measure the movement speed of the transmission mechanism 42, thereby indirectly obtaining the movement speed of the loading plate 43. It also converts speed information into electrical signals and transmits them to the control unit, enabling the control unit to precisely adjust the speed of the servo motor 41 based on the difference between the actual speed and the set speed, thus ensuring the stability and accuracy of the loading speed.

[0071] Furthermore, in actual roads, the loads exerted by vehicles on the road surface are diverse, including varying magnitudes and loading speeds. The loading speed and load control device 40, by setting the loading speed to 0.1~10 mm / min and the load range to 10~2000 kN, can simulate various traffic load conditions. For example, a lower loading speed and smaller load can simulate the load of small vehicles traveling at low speeds on urban roads; while a higher loading speed and larger load can simulate the load of large trucks or buses traveling at high speeds on highways. Through this simulation, the performance of asphalt specimens under different traffic load conditions can be tested more comprehensively, providing important evidence for evaluating the durability and deformation resistance of asphalt pavements in actual use.

[0072] The loading speed and load control device 40 can precisely control the loading speed and load magnitude. During testing, researchers can accurately set the loading speed and load values ​​according to specific experimental requirements, and the device can ensure the stability and accuracy of the loading parameters throughout the testing process. This is crucial for obtaining reliable experimental data, because only under precisely controlled loading conditions can the rutting resistance and other related mechanical properties of asphalt specimens be accurately evaluated, thus providing a scientific basis for the design and material selection of asphalt pavements.

[0073] Please refer to Figure 7. The data acquisition and analysis device 50 includes a wireless transmission unit 51 and an analysis unit 52. The wireless transmission unit 51 is electrically connected to the test device 20, the environmental temperature and humidity control device 30 and the control unit, respectively. The analysis unit 52 is electrically connected to the wireless transmission unit 51.

[0074] Specifically, the wireless transmission unit includes a wireless transceiver subunit, an antenna, a signal modulation and demodulation circuit, a power supply circuit, and a microcontroller. The wireless transmission unit is responsible for receiving data from these devices, including rut depth and lateral deformation data measured by the intelligent rut depth and lateral deformation testing device 20, environmental temperature and humidity data monitored by the environmental temperature and humidity control device 30, and related data such as loading speed and load recorded by the control unit. It then transmits this data to the analysis unit 52 via wireless transmission methods such as Zigbee or Wifi, achieving efficient and stable data transmission, avoiding complex wired connections, and improving the flexibility and convenience of the device.

[0075] Specifically, the analysis unit 52 includes a processor, storage device, data interface, analysis software, and display subunit. Its main responsibility is to receive various data transmitted from the wireless transmission unit 51 and analyze and process this data. Based on preset algorithms and models, it can evaluate the rutting deformation and lateral deformation of cold-mixed, cold-laid emulsified asphalt mixtures under high-temperature conditions. Combining environmental temperature and humidity with factors such as loading speed and load, it comprehensively analyzes the high-temperature stability of the mixture. Simultaneously, the analysis unit 52 can display the analysis results in real time via computers and other devices, providing researchers with intuitive data visualization. This allows them to promptly understand the test results, determine whether the mixture's performance meets requirements, and thus provide a basis for optimizing the mixture mix proportions and improving construction techniques.

[0076] In this embodiment, the data acquisition and analysis device 50 is mechanically connected to the testing device 20. It receives and processes the test data through wireless transmission methods such as Zigbee or Wifi, and evaluates the high-temperature stability of the asphalt mixture through real-time analysis and display on a computer.

[0077] Specifically, after receiving the digital signal, the data acquisition and analysis device 50 (computer) first performs preprocessing on the data, including noise removal, missing value imputation, and data normalization. Noise removal reduces interference signals that may be introduced during the test, improving data quality; missing value imputation ensures data integrity and avoids affecting subsequent analysis due to partial data loss; data normalization converts data of different types and magnitudes to a uniform scale, facilitating subsequent calculations and comparisons.

[0078] The processed data will be analyzed according to preset algorithms and models. To assess the high-temperature stability of asphalt mixtures, the deformation patterns of asphalt specimens under different loads and temperatures may be analyzed, and relevant indicators such as stability and flow value may be calculated. Stability refers to the ability of an asphalt mixture to resist deformation under a constant load at a given temperature; flow value refers to the vertical deformation of the specimen when the maximum load is reached. These indicators are used to determine the stability of asphalt mixtures in high-temperature environments.

[0079] The analyzed data will be displayed in real-time on a computer in an intuitive manner, such as in the form of charts (e.g., line graphs, bar charts) showing the deformation trend of asphalt specimens over time or under load, as well as specific values ​​for indicators such as stability and flow value. Simultaneously, based on relevant standards and experience, the high-temperature stability of the asphalt mixture is assessed to determine whether it meets engineering requirements. If it does not meet the requirements, further data analysis can be conducted to identify potential problems, providing a basis for improving the asphalt mixture formulation or construction process.

[0080] In summary, the testing process of the high-temperature rutting resistance testing mechanism 100 provided in this embodiment of the invention for cold-mixed and cold-laid emulsified asphalt mixtures is as follows:

[0081] (1) Prepare emulsified asphalt mixture in a mixer according to the predetermined proportion.

[0082] (2) Pour the mixture into the compaction side frame 112, use a scraper to level it, and pre-compact it.

[0083] (3) Place the compacted asphalt sample in a 60℃ oven and dry it to constant weight, generally for no less than 16 hours.

[0084] (4) Place the prepared asphalt sample in a constant temperature and humidity environment.

[0085] (5) Start the intelligent rut depth test module and the transverse deformation test module to begin testing the asphalt sample.

[0086] (6) The loading speed and load control device 40 applies a continuous load to the asphalt sample according to the set mode.

[0087] (7) The data acquisition and analysis device 50 acquires the above test data in real time and performs analysis and processing.

[0088] Compared with the prior art, the present invention has the following advantages:

[0089] First, the high-temperature resistance to rutting deformation test mechanism 100 has been improved by adding a compaction device 10, making it more in line with engineering practice.

[0090] Secondly, the high-temperature resistance to rutting deformation test mechanism 100 adopts non-contact continuous measurement, which improves the test accuracy, avoids damage to asphalt samples, and can be monitored in real time throughout the rolling process.

[0091] Furthermore, the high-temperature resistance to rutting deformation test mechanism 100 adopts automated testing, which can reduce manual operation and improve testing efficiency and repeatability.

[0092] Finally, the loading speed and load control device 40 can realize the controllability of loading speed and load, and simulate performance tests under different traffic load conditions.

[0093] It should be noted that all the above embodiments belong to the same inventive concept, and the descriptions of each embodiment have different focuses. Where the description in a particular embodiment is not exhaustive, please refer to the descriptions in other embodiments. The above embodiments only illustrate the implementation of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the inventive concept, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A high-temperature resistance to rutting deformation testing mechanism, characterized in that, include: The testing device is used to obtain data on the resistance to rutting deformation of asphalt specimens. An environmental temperature and humidity control device, mechanically connected to the testing device, is used to adjust the temperature and humidity of the environment surrounding the asphalt specimen; A loading speed and load control device is mechanically connected to the testing device and is used to simulate the performance test of the asphalt specimen under different traffic load conditions; a data acquisition and analysis device is electrically connected to the testing device, the environmental temperature and humidity control device, and the loading speed and load control device, respectively, and is used to acquire and analyze the rutting deformation resistance performance data.

2. The high-temperature resistance to rutting deformation testing mechanism according to claim 1, characterized in that, It also includes a compaction device, which is used to compact the emulsified asphalt mixture to be tested in order to obtain the asphalt specimen.

3. The high-temperature resistance to rutting deformation testing mechanism according to claim 2, characterized in that, The compaction device includes a compaction mold, which includes a compaction base plate and a compaction side frame, and the compaction side frame is detachably connected to the compaction base plate.

4. The high-temperature resistance to rutting deformation testing mechanism according to claim 3, characterized in that, The compaction device further includes a compaction roller assembly, which includes a compaction roller, a connecting rod, and a compaction handle. The connecting rod is fitted into the shaft hole of the compaction roller via an interference fit, and the compaction handle is fixedly connected to both ends of the connecting rod.

5. The high-temperature resistance to rutting deformation testing mechanism according to claim 4, characterized in that, The length of the compaction wheel is less than the inner dimension of the compaction side frame that is parallel to the length direction of the compaction wheel.

6. The high-temperature resistance to rutting deformation testing mechanism according to claim 1, characterized in that, The testing device includes a load plate, a rolling wheel, a wheel controller, and a rolling frequency regulator. The load plate is placed on the rolling wheel, the wheel controller is connected to the rolling wheel via a drive shaft, and the rolling frequency regulator is electrically connected to the wheel controller.

7. The high-temperature resistance to rutting deformation testing mechanism according to claim 6, characterized in that, The testing device also includes multiple laser monitors and a laser detection regulator. Each laser monitor is electrically connected to the laser detection regulator. The laser monitors are used to measure the rut depth and lateral deformation of the asphalt specimen.

8. The high-temperature resistance to rutting deformation testing mechanism according to claim 1, characterized in that, The environmental temperature and humidity control device includes a heater, an electric fan, a temperature and humidity preset and real-time panel, a temperature regulator and a humidity regulator. The heater and the electric fan are electrically connected to the temperature regulator, and the temperature and humidity preset and real-time panel is electrically connected to the temperature regulator and the humidity regulator.

9. The high-temperature resistance to rutting deformation testing mechanism according to claim 1, characterized in that, The loading speed and load control device includes a servo motor, a transmission mechanism, a loading plate, a load sensor, a speed sensor, and a control unit. The servo motor is connected to the input end of the transmission mechanism via a coupling, and the output end of the transmission mechanism is connected to the loading plate. The load sensor is mounted on the loading plate, and the speed sensor is mounted on the transmission mechanism. The control unit is electrically connected to the servo motor, the load sensor, and the speed sensor, respectively.

10. The high-temperature resistance to rutting deformation testing mechanism according to claim 9, characterized in that, The data acquisition and analysis device includes a wireless transmission unit and an analysis unit. The wireless transmission unit is electrically connected to the testing device, the environmental temperature and humidity control device, and the control unit, respectively. The analysis unit is electrically connected to the wireless transmission unit.

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