Aging test device for asphalt

Abstract

The utility model relates to an aging test device for asphalt in the technical field of ultraviolet aging tests of building materials. The aging test device comprises two independently arranged high and low temperature ultraviolet box devices, an external annular conveying mechanism and an asphalt bearing tray matched with asphalt and an asphalt mixture, the conveying mechanism goes in and out of the two high-low temperature ultraviolet box devices; the asphalt bearing tray is arranged on the conveying mechanism; the two high-low temperature ultraviolet box devices are independent temperature control systems, one of the two high-low temperature ultraviolet box devices simulates a night mode, and only the refrigerating device is started; and the other high-low temperature ultraviolet box device simulates a daytime mode, and the ultraviolet lamp tube group and the blast heating device are started at the same time. The asphalt sample is driven by the conveying mechanism to advance or stay between the two high-low temperature ultraviolet box devices; switching of asphalt between a high-temperature ultraviolet environment and a low-temperature environment is simulated, large-temperature-difference circulating switching of the high-temperature ultraviolet environment and the low-temperature environment is achieved by combining control over the temperature, irradiance and the sample moving speed, and the aging influence of the day and night temperature difference on asphalt materials can be simulated.

Description

Technical Field

[0001] This utility model relates to the field of ultraviolet aging testing technology for building materials, specifically an adjustable-cycle ultraviolet aging testing device for asphalt aging. Background Technology

[0002] Asphalt, a crucial material for road construction, is subject to the combined influence of natural environmental factors. This is particularly pronounced in areas with significant diurnal temperature variations, frequent freeze-thaw cycles, and intense ultraviolet radiation, where the aging and degradation of asphalt materials are more pronounced. Ultraviolet aging and freeze-thaw cycle aging, as evaluation components of asphalt performance, require simulating the characteristics of high-temperature ultraviolet coupling and low-temperature freeze-thaw cycles. Accelerated aging tests are conducted on asphalt samples to simulate ultraviolet radiation and temperature changes in the natural environment, thereby assessing their weather resistance and service life.

[0003] However, while existing UV aging test devices can achieve basic simulations of UV radiation and temperature changes, they have systematic deficiencies in simulating diurnal temperature differences and freeze-thaw cycles. Traditional equipment can usually only maintain a single constant temperature environment or simple temperature-controlled cycles, making it difficult to reproduce the diurnal alternation process in areas with large temperature differences. That is, it cannot reproduce the high-temperature UV and low-temperature freeze-thaw cycles, leading to significant deviations between test results and actual environments. For example, the utility model patent "A Coupled Asphalt Aging Test Device" (CN 221572258 U) discloses a coupled asphalt aging test device, including a test chamber body and a reciprocating conveyor device. The test chamber body has a test cavity inside, which includes a UV baking chamber and a freezing chamber separated by heat-insulating glass. A connecting groove is provided at the bottom of the heat-insulating glass. One end of the reciprocating conveyor device is fixed in the UV baking chamber, and the other end of the connecting groove is fixed in the freezing chamber. An asphalt sample is placed on the reciprocating conveyor device. This invention uses a reciprocating conveyor to transfer asphalt samples between a UV baking chamber and a freezing chamber, ensuring that the asphalt samples are subjected to both UV irradiation and uniform cold air spraying. It also alternates between individual UV irradiation and individual low-temperature aging tests on the asphalt material, simulating the aging process of asphalt under natural low-temperature humidity and UV environmental conditions. This provides a rapid and reliable comparative evaluation basis for the low-temperature UV aging of asphalt. Its main disadvantages are as follows:

[0004] 1. The above technology only simulates the aging of asphalt under natural low temperature, humidity and / or ultraviolet light environment conditions, and does not solve the technical defects of using a single test chamber body. The structure only separates the ultraviolet baking chamber and the freezing chamber through the heat insulation plate. The two chambers are connected and there is no independent temperature control system. Not only can it not form a real large temperature difference environment, it is difficult to carry out freeze-thaw cycle tests that fit the actual engineering situation, but it is also impossible to realize the simulation of day and night cycle aging of asphalt under natural environment.

[0005] 2. The load-bearing structure of this device is only suitable for a small number of asphalt binder samples. It cannot achieve uniform and stable aging tests for asphalt mixtures with larger volumes and stronger engineering applications, thus limiting its applicability.

[0006] 3. The heat-insulating glass separating the two chambers in the device can only block ultraviolet rays and cannot effectively maintain the temperature difference between the two chambers. The temperature control accuracy is low and cannot meet the technical requirements of large temperature difference freeze-thaw cycle test.

[0007] 4. The device does not have an independent sample storage and retrieval structure. The asphalt sample must be placed and retrieved in the test chamber, which is prone to temperature fluctuations in the chamber. In addition, the sample handling process still requires manual operation, which not only increases the labor intensity of the operators, but also makes the samples prone to damage due to vibration and collision, or cause the test data to be distorted due to temperature control fluctuations.

[0008] Existing devices have shortcomings in understanding the synergistic mechanism of temperature control and ultraviolet irradiation, making it difficult to comprehensively and accurately assess the overall aging performance of asphalt in regions with large temperature differences. This, in turn, affects the scientific selection of road materials and the prediction of engineering life. Therefore, there is an urgent need to develop a new type of testing device that can simulate diurnal temperature differences, achieve synergistic ultraviolet-temperature control, be adaptable to various types of asphalt samples, and have a high degree of automation. Utility Model Content

[0009] To address the aforementioned technical problems, this utility model provides an aging test device for asphalt, aiming to solve the technical problems of existing devices being unable to construct a large temperature difference freeze-thaw cycle environment, poor coordination between ultraviolet light and temperature, poor adaptability to test objects, and interference with test data by manual operation. It has the advantages of achieving independent dual-chamber high and low temperature environment switching through a conveying mechanism and simulating large temperature differences under actual climate conditions, and can fully meet the needs of aging tests for asphalt and asphalt mixtures.

[0010] The technical solution of this utility model is as follows: an aging test device for asphalt, comprising two high-low temperature ultraviolet (UV) chambers, a conveying mechanism, and an asphalt carrying tray; the two independently set high-low temperature UV chambers are connected by the conveying mechanism, and the asphalt carrying tray is set on the conveying mechanism and enters and exits the two high-low temperature UV chambers through the circular conveying path of the conveying mechanism. The conveying mechanism includes support legs, a circular track, and a roller conveyor; the support legs support the circular track; the roller conveyor is set on the circular track and can rotate in both directions; the asphalt carrying tray is driven by the roller conveyor to move along the circular track, passing through or stopping within the two high-low temperature UV chambers; a speed / direction controller is set on the circular track to adjust the moving speed and residence time of the sample.

[0011] The high and low temperature ultraviolet chamber is an independent temperature control system. The ultraviolet lamp group, irradiance sensor, temperature sensor, refrigeration unit and blower heating unit inside are respectively connected to the programmable controller. The programmable controller is installed outside the high and low temperature ultraviolet chamber. The programmable controller ensures that the refrigeration unit and the blower heating unit operate mutually exclusively, and ensures that the ultraviolet lamp group is started only at the same time as the blower heating unit.

[0012] Asphalt support pallets include concave pallets for storing asphalt or asphalt mixtures. The concave pallets are made of metal with a concave structure and are lined with high-temperature resistant silicone pads on the inside and bottom.

[0013] Based on the above technical features: the high and low temperature ultraviolet chamber device also includes a conveying mechanism channel; the top plate of the chamber is equipped with an ultraviolet lamp group to simulate the natural ultraviolet radiation environment; the side is equipped with a hot air blower of the blower heating device to heat the chamber; the middle of the chamber is equipped with a conveying mechanism channel so that the ring track can enter the chamber; and the bottom of the chamber is integrated with a refrigeration device.

[0014] The high and low temperature ultraviolet chamber device also includes an upper sealed door and a lower sealed door, which open and close vertically and are located at the opening of the conveyor channel. The upper side of the lower sealed door has a groove that matches the bottom of the annular track. The lower side of the upper sealed door has a latch that matches the side wall of the annular track and the roller conveyor device. After the upper and lower sealed doors are closed vertically, they lock the conveyor mechanism, thereby achieving overall sealing of the high and low temperature ultraviolet chamber device.

[0015] The high and low temperature ultraviolet chamber device is sealed to effectively isolate heat exchange between the inside and outside of the chamber, avoid interference from the external ambient temperature with the test temperature, and ensure the consistency of temperature conditions for asphalt sample aging tests; at the same time, it can prevent ultraviolet radiation leakage from the chamber, protect the personal safety of operators, and ensure stable ultraviolet irradiation.

[0016] Based on the above technical features: the asphalt bearing tray includes a concave tray, a limiting platform, an intermediate support, and limiting wheels; the concave tray is supported on the limiting platform by the intermediate support; the limiting platform has downwardly extending side walls on both sides, and the limiting wheels are respectively arranged laterally inside the side walls on both sides. The limiting platform with limiting wheels is locked on the outside of the annular track, and the limiting wheels can roll horizontally along the outer side wall of the annular track. The asphalt bearing tray is suitable for various types and volumes of samples such as asphalt samples and asphalt mixtures. Compared with the structure disclosed in "An Asphalt Aging Coupled Test Device" (CN221572258U), which can only be adapted to small asphalt samples, this technology can conduct aging tests on asphalt mixtures, which is more in line with the actual application needs of road engineering.

[0017] Based on the above technical features: the ultraviolet irradiation intensity of the ultraviolet lamp group can be adjusted by a programmable controller to ensure that the ultraviolet irradiation is coordinated with the high temperature environment and that the high and low temperature devices operate mutually exclusively. With the real-time monitoring of the irradiance sensor and the temperature sensor, the coordinated control of ultraviolet and temperature can be achieved. Compared with the structure of "a kind of asphalt aging coupling test device" (CN221572258U) which has no coordinated control mechanism, this technology can better fit the characteristics of natural environments such as Northwest China, which are characterized by high temperature and high ultraviolet radiation but large diurnal temperature difference.

[0018] Based on the above technical features: the ring track is made of stainless steel; the surface of the ring track is coated with a polytetrafluoroethylene wear-resistant layer; the asphalt bearing tray moves smoothly through the limiting wheels. Compared with the simple reciprocating conveying structure disclosed in "An Asphalt Aging Coupled Test Device" (CN221572258U), the conveying stability is higher and it can effectively avoid vibration and collision of the sample during the movement.

[0019] Compared with existing technologies, this invention uses two high-low temperature ultraviolet (UV) chambers. One chamber simulates nighttime mode, with only the cooling device activated; the other simulates daytime mode, with both the UV lamp assembly and the blower heating device activated. A conveyor mechanism moves or stops the asphalt sample between the two chambers, simulating the switching between high-temperature UV and low-temperature environments. By controlling temperature, irradiance, and sample movement speed, it can simulate the aging effect of diurnal temperature differences on asphalt materials. Compared with existing technologies and "an asphalt aging coupled test device" (CN221572258U), it can more comprehensively evaluate the overall aging performance of asphalt and asphalt mixtures in areas with large temperature differences.

[0020] Asphalt mixtures are essential materials for road paving, composed of asphalt, mineral powder, aggregate, and other modifiers mixed in specific proportions. Compared to asphalt samples, asphalt mixtures are larger and more complex in structure, and their aging performance directly determines the overall service life of the road. This device features a concave metal support tray adapted for placing molded asphalt mixture samples. High-temperature resistant silicone pads prevent samples from sticking to the tray and cushion vibrations during movement. The stable conveying structure of the circular track ensures uniform heating and irradiation of the mixture samples within the high- and low-temperature ultraviolet chamber, enabling high-temperature ultraviolet and low-temperature freeze-thaw day-night cyclic aging tests on asphalt mixtures.

[0021] This device can stably reproduce the dynamic changes in diurnal temperature difference, realize the cyclic simulation of high temperature ultraviolet radiation and low temperature, and the ring conveyor mechanism is an external ring structure, so the samples can be stored and retrieved in the track area outside the high and low temperature ultraviolet chamber device, completely avoiding the interference of the loading and unloading operation on the chamber temperature. It effectively solves the technical defects of the existing device, such as the inability of a single chamber to build a large temperature difference, poor temperature control of the heat insulation structure, low adaptability of asphalt mixture samples, and interference of manual handling with test data. It provides an efficient test platform for the weather resistance evaluation of road materials. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0023] Figure 2 This is a cross-sectional view of the internal structure of the high and low temperature ultraviolet chamber device of this utility model.

[0024] Figure 3 This is a schematic diagram of the conveying mechanism of this utility model.

[0025] Figure 4 This is a schematic diagram of the asphalt bearing pallet in this utility model.

[0026] Figure 5 This is a partial schematic diagram of the asphalt bearing pallet mounted on the conveying mechanism in this utility model.

[0027] Figure 6 This is a partial schematic diagram of the upper and lower sealed compartment doors of this utility model.

[0028] The component numbers in the diagram are:

[0029] High and low temperature ultraviolet chamber device 1, conveying mechanism 2, asphalt bearing pallet 3, chamber body 1-1, ultraviolet lamp group 1-2, irradiance sensor 1-3, programmable controller 1-4, conveying mechanism channel 1-5, temperature sensor 1-6, blower heating device 1-7, refrigeration device 1-8, upper sealed door 1-9, lower sealed door 1-10, bayonet 1-11, aging chamber support leg 1-12, groove 1-13, annular track support leg 2-1, annular track 2-2, roller conveyor device 2-3, speed / direction controller 2-4, concave pallet 3-1, limiting platform 3-2, intermediate support 3-3, limiting wheel 3-4. Detailed Implementation

[0030] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. These embodiments are only used to illustrate this utility model and are not intended to limit it.

[0031] In the description of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] like Figure 1 As shown, the aging test apparatus for asphalt includes two high-low temperature ultraviolet (UV) chambers 1, a conveying mechanism 2, and an asphalt carrying tray 3. The conveying mechanism 2 enters and exits the interior of the two UV chambers 1 and circles around them; the asphalt carrying tray 3 is mounted on the conveying mechanism 2. In this invention, the UV chambers 1 are two separate structures. Compared with the prior art, the two UV chambers 1 are not close together, with sufficient operating space reserved between them. This design allows sample storage and retrieval to be completed in the ring-shaped track area outside the two chambers, without entering the chambers, avoiding interference with the internal temperature control environment when retrieving samples, and effectively ensuring test accuracy. At the same time, the independent split structure ensures that the temperature control systems of the two chambers do not affect each other, and can stably form a large temperature difference environment. Compared with the existing single-chamber separated chamber structure, the temperature control sealing performance is greatly improved, and the independent setting of the chambers also facilitates individual maintenance and debugging later.

[0033] like Figure 2 The diagram shows the structural details of the high and low temperature ultraviolet chamber device 1. The device includes a chamber body 1-1, an ultraviolet lamp assembly 1-2, an irradiance sensor 1-3, a conveying mechanism channel 1-5, a temperature sensor 1-6, a forced-air heating device 1-7, a cooling device 1-8, an upper sealed door 1-9, and a lower sealed door 1-10. The conveying mechanism channel 1-5 is a transitional channel connecting the chamber body 1-1. Openings can be made on the front and rear surfaces of the chamber body 1-1 to allow the annular track 2-2 of the conveying mechanism 2 and the asphalt-supported pallet 3 to enter the chamber body 1-1.

[0034] The UV lamp assembly 1-2 is positioned above the high and low temperature UV chamber 1, the heating air outlet of the blower heating device 1-7 is positioned on the side wall of the high and low temperature UV chamber 1, and the cooling device 1-8 is positioned below the high and low temperature UV chamber 1. The blower heating device and the cooling device are themselves existing mature technologies.

[0035] like Figure 1 and Figure 6As shown, the upper sealed door 1-9 and the lower sealed door 1-10 open and close vertically and are located at the opening of the conveying mechanism channel 1-5; the upper side of the lower sealed door 1-10 is provided with a groove 1-13 that matches the bottom of the annular track 2-2; the lower side of the upper sealed door 1-9 is provided with a latch 1-11 that matches the side wall of the annular track 2-2 and the roller device 2-3, that is, the upper sealed door 1-9 can be inserted downward into the gap between the two rollers of the roller device 2-3, and at the same time, the side wall of the annular track 2-2 can be inserted into the latch 1-11.

[0036] After the upper sealed door 1-9 and the lower sealed door 1-10 are closed, the transmission mechanism 2 is locked, thus achieving overall sealing of the high and low temperature ultraviolet box device 1.

[0037] The upper sealed hatch 1-9 and the lower sealed hatch 1-10 can be opened and closed vertically via upper and lower sliding tracks. The vertical opening and closing sliding door technology is a mature existing technology.

[0038] The high and low temperature ultraviolet chamber device 1 can be equipped with aging chamber support legs 1-12 to raise the entire chamber.

[0039] like Figure 3 As shown, the conveying mechanism 2 includes a support leg 2-1, a circular track 2-2, a roller conveyor device 2-3, and a speed / direction controller 2-4. The roller conveyor device 2-3 is mounted on the circular track 2-2, and the conveying rollers are arranged along the circular track 2-2, allowing bidirectional rotation, which means it can drive the asphalt bearing pallet 3 to rotate clockwise or counterclockwise in the horizontal direction. The speed / direction controller 2-4 controls the rotation direction and speed of the roller conveyor device 2-3.

[0040] The asphalt-bearing pallet 3 is driven by the roller conveyor device 2-3 and moves along the circular track 2-2 of the conveying mechanism 2, passing through or stopping within the two high and low temperature ultraviolet chamber devices 1.

[0041] The asphalt carrying pallet 3 can be placed directly on the roller conveyor 2-3 of the conveying mechanism 2 and move stably by its own weight. As an optimization, limiting wheels 3-4 can be installed to limit the left and right movement of the asphalt carrying pallet 3 on the circular track 2-2. Figure 4 and Figure 5 As shown, the asphalt support tray 3 includes a concave tray 3-1, a limiting platform 3-2, an intermediate support 3-3, and limiting wheels 3-4. The concave tray 3-1 is a concave structure made of metal, with high-temperature resistant silicone pads laid on the inner side and bottom. The concave tray 3-1 is used to place asphalt samples and asphalt mixture molded samples. Compared with the existing technology, which can only accommodate small asphalt samples, the load-bearing space and structural adaptability of this concave metal structure tray are greatly improved, which can meet the placement requirements of asphalt mixture molded samples of different sizes, and there is no need to change the test equipment during the test.

[0042] The concave tray 3-1 is supported by a central support 3-3, the purpose of which is to limit the position of the concave tray 3-1. The two sides of the limiting platform 3-2 are downwardly extending sidewalls, and the limiting wheels 3-4 are respectively arranged laterally inside the sidewalls on both sides. The limiting platform 3-2 with the limiting wheels 3-4 is engaged on the outer side of the annular track 2-2, and the limiting wheels 3-4 can roll along the outer sidewall of the annular track 2-2.

[0043] like Figure 1 As shown, the programmable controller 1-4 can be installed outside the enclosure 1-1. The temperature sensor 1-6, ultraviolet lamp group 1-2, irradiance sensor 1-3, refrigeration device 1-8, and blower heating device 1-7 installed inside the high and low temperature ultraviolet chamber device 1 are respectively connected to the programmable controller 1-4; the compression refrigeration device 1-8 and the blower heating device 1-7 are not turned on at the same time; the ultraviolet lamp group 1-2 is only used in conjunction with the blower heating device 1-7.

[0044] The programmable controller 1-4 controls the opening, closing and intensity of the ultraviolet lamp group 1-2, the cooling device 1-8 and the blower heating device 1-7, and collects real-time irradiance and temperature data through the irradiance sensor 1-3 and the temperature sensor 1-6.

[0045] The UV lamp assembly 1-2 can simulate different irradiation levels. The UV irradiation intensity of the UV lamp assembly 1-2 can be adjusted by controlling the programmable controller.

[0046] The operating procedure of this utility model is as follows: When conducting asphalt sample testing, firstly, the high and low temperature ultraviolet chamber device 1 is activated. One of the two high and low temperature ultraviolet chamber devices 1 simulates night mode, with only the cooling device turned on; the other high and low temperature ultraviolet chamber device 1 simulates daytime mode, with both the ultraviolet lamp group and the blower heating device turned on. The prepared asphalt sample is then evenly placed in the asphalt support tray 3.

[0047] The speed / direction controller 2-4 of the transmission mechanism 2 is activated. The rollers drive the carrying tray 3 into the high and low temperature ultraviolet chamber device 1, which is set to high temperature and strong ultraviolet light, to receive ultraviolet irradiation and temperature control. After the set time is reached, the carrying tray 3 is automatically transferred by the transmission mechanism to another high and low temperature ultraviolet chamber device 1, which is set to low temperature and no radiation, where a low temperature environment is provided by a refrigeration device.

[0048] After the test with the set number of aging cycles is completed, the conveying mechanism 2 moves the asphalt bearing tray 3 to the initial position, and the operator can then take out the sample for subsequent testing and analysis.

[0049] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. An aging test apparatus for asphalt, characterized in that: The device includes two high-low temperature ultraviolet (UV) chambers (1), a conveying mechanism (2), and an asphalt carrying tray (3). The two independently set UV chambers (1) are connected by the conveying mechanism (2). The asphalt carrying tray (3) is set on the conveying mechanism (2) and enters and exits the two UV chambers (1) through the circular conveying path of the conveying mechanism (2). The conveying mechanism (2) includes a support leg (2-1), a circular track (2-2), and a roller conveyor (2-3). The support leg (2-1) supports the circular track (2-2). The roller conveyor (2-3) is set on the circular track (2-2) and can rotate in both directions. The asphalt carrying tray (3) is driven by the roller conveyor (2-3) to move along the circular track (2-2) and pass through or stop within the two UV chambers (1). A speed / direction controller (2-4) is set on the circular track (2-2). The ultraviolet lamp group (1-2), irradiance sensor (1-3), temperature sensor (1-6), refrigeration device (1-8), and blower heating device (1-7) installed in the high and low temperature ultraviolet chamber device (1) are respectively connected to the programmable controller (1-4); the programmable controller (1-4) is installed outside the chamber body (1-1) of the high and low temperature ultraviolet chamber device (1); the programmable controller (1-4) ensures that the refrigeration device (1-8) and the blower heating device (1-7) operate mutually exclusively, and ensures that the start-up of the ultraviolet lamp group (1-2) is only used simultaneously with the blower heating device (1-7); The asphalt support tray (3) includes a concave tray (3-1) for storing asphalt or asphalt mixture. The concave tray (3-1) is a concave structure made of metal, with high-temperature resistant silicone pads laid on the inner side and bottom.

2. The aging test apparatus for asphalt according to claim 1, characterized in that: The high and low temperature ultraviolet chamber device (1) also includes a conveying mechanism channel (1-5); the top plate of the chamber (1-1) is equipped with the ultraviolet lamp group (1-2) to simulate the natural ultraviolet radiation environment; the side is provided with the hot air blower of the blower heating device (1-7) to heat the chamber (1-1); the middle of the chamber (1-1) is provided with the conveying mechanism channel (1-5) so that the annular track (2-2) can enter the chamber (1-1); the bottom of the chamber (1-1) integrates the refrigeration device (1-8). The high and low temperature ultraviolet chamber device (1) also includes an upper sealed door (1-9) and a lower sealed door (1-10). The upper sealed door (1-9) and the lower sealed door (1-10) open and close vertically and are located at the opening of the conveying mechanism channel (1-5). The upper side of the lower sealed door (1-10) is provided with a groove (1-13) that matches the bottom of the annular track (2-2). The lower side of the upper sealed door (1-9) is provided with a bayonet (1-11) that matches the side wall of the annular track (2-2) and the roller device (2-3). After the upper sealed door (1-9) and the lower sealed door (1-10) are closed vertically, they clamp the conveying mechanism (2) to achieve overall sealing of the high and low temperature ultraviolet chamber device (1).

3. The aging test apparatus for asphalt according to claim 1, characterized in that: The asphalt bearing pallet (3) includes the concave pallet (3-1), the limiting platform (3-2), the intermediate support (3-3), and the limiting wheel (3-4); the concave pallet (3-1) is supported on the limiting platform (3-2) by the intermediate support (3-3); the limiting platform (3-2) has downwardly extending side walls on both sides, and the limiting wheel (3-4) is respectively arranged laterally in the side walls on both sides. The limiting platform (3-2) with the limiting wheel (3-4) is locked on the outside of the annular track (2-2), and the limiting wheel (3-4) can roll in the horizontal plane along the outer side wall of the annular track (2-2).

4. The aging test apparatus for asphalt according to claim 1, characterized in that: The ultraviolet irradiation intensity of the ultraviolet lamp group (1-2) can be adjusted by the programmable controller (1-4).

5. An aging test apparatus for asphalt according to claim 1, characterized in that: The annular track (2-2) is made of stainless steel; the surface of the annular track (2-2) is coated with a polytetrafluoroethylene wear-resistant layer.

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