An asphalt mixture whitening degree testing device

Abstract

The utility model provides a kind of asphalt mixture whitening degree testing device, belong to road engineering detection technical field, to solve the problem of insufficient comprehensive simulation capability of environmental factors in prior art, current asphalt mixture whitening degree detection and simulation test equipment mainly exists, including temperature control box, mould barrel is supported in temperature control box by support, mould barrel top is connected with pipe body, the one end of pipe body far from mould barrel is communicated with air compressor, air compressor is located in temperature control box side;The bottom of temperature control box is further provided with solution pool, calcium hydroxide solution is filled in solution pool, and the bottom of mould barrel is provided with the catheter that is communicated with solution pool.The utility model in, by integration temperature control, pressure exertion and chemical solution penetration function, realize temperature, pressure, chemical corrosion multi-factor synergistic effect under asphalt mixture whitening simulation, compared with single factor simulation is closer to actual pavement whitening mechanism, to provide effective test means for researching whitening influencing factor and anti-whitening material research and development.

Description

Technical Field

[0001] This utility model belongs to the field of road engineering testing technology, specifically relating to a test device for the degree of whitening of asphalt mixture. Background Technology

[0002] Whitening of asphalt pavement refers to the appearance of white or light-colored patches, streaks, or other cosmetic changes on the surface of asphalt pavement during its service life. Essentially, it is an external manifestation of deterioration in the interfacial properties between asphalt and aggregates or migration of asphalt components. This phenomenon not only affects the aesthetics of the pavement but may also indicate a decline in its structural performance, making it one of the common early defects of asphalt pavements.

[0003] Current testing and simulation equipment for detecting and simulating the whitening degree of asphalt mixtures suffers from insufficient comprehensive simulation capabilities of environmental factors. Specifically, most existing testing equipment can only simulate a single environmental factor (such as temperature or pressure). For example, some equipment can conduct exposure tests on samples under constant temperature or pressure conditions to observe the whitening phenomenon, but it cannot simultaneously simulate multiple environmental changes encountered by asphalt mixtures in actual use, such as temperature, chemical erosion, and pressure. This single-factor simulation method prevents the equipment from accurately reproducing the whitening situation of asphalt mixtures under complex environments, making it difficult to comprehensively reveal the whitening mechanism under the combined effects of multiple environmental factors. Utility Model Content

[0004] In view of this, the present invention provides a test device for the whitening degree of asphalt mixture, in order to solve the problem that the current testing and simulation equipment for the whitening degree of asphalt mixture mainly has insufficient comprehensive simulation capability of environmental factors.

[0005] The technical solution adopted in this utility model is as follows: A device for testing the whitening degree of asphalt mixture includes a temperature control chamber, in which a mold barrel is supported by a bracket. A pipe is connected to the top of the mold barrel, and the end of the pipe away from the mold barrel is connected to an air compressor. The air compressor is located on one side of the temperature control chamber. The bottom of the temperature control box is also equipped with a solution pool, which is filled with calcium hydroxide solution. The bottom of the mold barrel is equipped with a conduit that communicates with the solution pool.

[0006] In this technical solution, it should be noted that the temperature control chamber in the asphalt mixture whitening test device uses a stainless steel shell with internal dimensions of 600×500×700mm. The temperature control chamber is used to precisely control the test temperature to simulate the effect of actual road surface temperature environment on asphalt mixture whitening. The bracket supports the mold barrel to place it stably in the temperature control chamber and keep the specimen position fixed. The mold barrel is used to hold the asphalt mixture specimen and provide a carrier for the whitening test. The mold barrel is made of acid and alkali resistant PP material with an inner diameter of 250mm. The pipe connects the mold barrel to the air compressor to transmit the pressure generated by the air compressor. The air compressor applies controllable pressure to the mold barrel through the pipe to simulate the effect of vehicle load or environmental pressure on the asphalt mixture. The solution pool is filled with calcium hydroxide solution as a medium to simulate chemical erosion. The conduit connects the solution pool to the bottom of the mold barrel so that the calcium hydroxide solution can penetrate into the specimen inside the mold barrel under pressure. The overall working principle is as follows: Asphalt mixture specimens are placed in a mold barrel. After adding calcium hydroxide solution to the solution tank, the temperature control chamber is set to the test temperature. An air compressor is turned on, applying pressure to the mold barrel through pipes. This pressure drives the calcium hydroxide solution from the solution tank through a conduit into the mold barrel and penetrates into the asphalt mixture. When the solution migrates to the surface of the asphalt layer with water, the calcium hydroxide reacts with carbon dioxide in the air to form white calcium carbonate, thus simulating the whitening phenomenon. By adjusting the amount or concentration of the calcium hydroxide solution, the alkalinity can be changed to simulate different degrees of chemical erosion. The effectiveness of this device lies in its integration of temperature control, pressure application, and chemical solution penetration functions, enabling the simulation of asphalt mixture whitening under the synergistic effects of multiple factors such as temperature, pressure, and chemical erosion. Compared to single-factor simulations, this method more closely approximates the actual whitening mechanism of road surfaces, providing an effective experimental means for studying the influencing factors of whitening and developing anti-whitening materials.

[0007] Preferably, the top of the mold barrel has a removable barrel cover, and the barrel cover has an interface for threaded connection with the pipe body.

[0008] In this technical solution, it should be noted that the detachable bucket lid is made of acid and alkali resistant transparent polycarbonate (PC) material, and is connected to the top of the mold bucket via a threaded connection. A fluororubber sealing ring is provided at the edge to maintain the mold bucket's seal, while its transparency facilitates direct observation of the specimen's condition. A 12mm inner diameter pipe thread interface is located in the center of the lid, which seals with the external thread of the pipe to transmit air compressor pressure. A waterproof miniature camera (1080P resolution, 30fps) is embedded in the top surface of the lid, with the lens aimed at the specimen surface. It is connected to an external image analysis device via a data cable to acquire real-time images of the specimen surface. The overall working principle is as follows: During installation, the transparent bucket lid is tightened and connected to the pipe. The camera automatically starts after the lid is fixed, capturing real-time images of the asphalt mixture specimen surface inside the mold bucket. The camera simultaneously records the surface whitening evolution process. The image data is transmitted to the image analysis device via a data cable. Using algorithms in existing technology, parameters such as the proportion of whitened area and the density of patch distribution are calculated to achieve dynamic quantitative monitoring of the whitening degree.

[0009] Preferably, the temperature control box is provided with guide rails on both sides, and the bracket is provided with slide rails on both sides that are slidably connected to the guide rails.

[0010] In this technical solution, it should be noted that the guide rails on both sides of the temperature control chamber are made of 304 stainless steel and are fixed to the inner wall of the chamber, providing sliding guide tracks for the support. The slide rails on both sides of the support slide in conjunction with the guide rails, and are also made of 304 stainless steel with a wear-resistant surface treatment, allowing the support to slide smoothly within the temperature control chamber, facilitating the loading, unloading, and positioning of the mold barrel. During installation, the slide rails on both sides of the support are embedded into the guide rails on the inner wall of the temperature control chamber, and the support is slid along the guide rails to the designated position, ensuring that the mold barrel is accurately positioned above the solution pool and that the conduit connection is smooth. During the test, the support remains stable through the cooperation of the slide rails and guide rails, preventing displacement due to pressure. After the test, the mold barrel is removed from the temperature control chamber by sliding the support along the guide rails, facilitating specimen removal and equipment maintenance. Effect: The sliding connection structure of the guide rails and slide rails shortens the time for loading and unloading the mold barrel, improving operational efficiency, and also facilitates adjustment of the mold barrel's position.

[0011] Preferably, a screw is rotatably connected to one of the guide rails, and the slide rail is threadedly connected to the screw.

[0012] In this technical solution, it should be noted that the screw connected to the guide rail is made of stainless steel and is horizontally installed along the length of the guide rail. Both ends are rotatably connected to the two sides of the guide rail via bearings. Threaded holes matching the screw are opened on the inner side of the slide rail. When the screw rotates, the slide rail moves linearly along the length of the guide rail, causing the support to move synchronously, thus achieving horizontal positioning of the mold barrel within the temperature control chamber. Working principle: The screw is driven to rotate by a rotating ring or servo motor. The threaded transmission converts the rotational motion into horizontal displacement of the slide rail, causing the support to slide along the length of the guide rail. Before the test, the mold barrel can be adjusted to the designated position according to the location of the solution pool or the layout of multiple test pieces. The self-locking characteristic of the screw ensures that the position is fixed during the test, avoiding displacement under pressure. Limiting blocks on both sides of the guide rail restrict the range of movement of the slide rail, preventing it from detaching from the guide rail. Effect: By setting the screw, the positioning error of the traditional sliding support is reduced, and the position of the mold barrel can be controlled.

[0013] Preferably, a rotating ring is fixedly connected to one end of the screw.

[0014] In this technical solution, it should be noted that the rotating ring is designed to facilitate the operation of the screw by the workers.

[0015] Preferably, the support has a placement plate in the middle, the placement plate has a placement groove for placing the mold barrel, and the placement groove has an opening in the middle.

[0016] In this technical solution, it should be noted that the placement plate in the middle of the frame is made of 304 stainless steel plate, and the surface is sandblasted to increase friction, which is used to support the mold barrel; the placement groove is a circular groove with an inner diameter larger than the outer diameter of the mold barrel, which restricts the horizontal displacement of the mold barrel; the diameter of the circular opening in the middle of the placement groove is aligned with the conduit interface at the bottom of the mold barrel, ensuring that the calcium hydroxide solution in the solution pool can enter the mold barrel through the opening and the conduit.

[0017] Preferably, the pipe body is equipped with a pressure valve.

[0018] In this technical solution, it should be noted that the pressure valve is used to display the pressure, which is convenient for staff to adjust in real time. The pressure valve adopts existing technology and will not be explained in detail here.

[0019] Preferably, the temperature control box has a hinged door on one side.

[0020] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are: 1. In this utility model, by integrating temperature control, pressure application and chemical solution penetration functions, the whitening of asphalt mixture under the synergistic effect of multiple factors such as temperature, pressure and chemical erosion is simulated. Compared with single-factor simulation, it is closer to the actual whitening mechanism of road surface, and provides an effective experimental means for studying the influencing factors of whitening and developing anti-whitening materials. 2. In this utility model, the sliding connection structure between the guide rail and the slide rail shortens the loading and unloading time of the mold barrel, improves the operating efficiency, and facilitates the adjustment of the position of the mold barrel. 3. In this utility model, the placement groove is a circular groove with an inner diameter larger than the outer diameter of the mold barrel, which restricts the horizontal displacement of the mold barrel; the diameter of the circular opening in the middle of the placement groove is aligned with the conduit interface at the bottom of the mold barrel, ensuring that the calcium hydroxide solution in the solution pool can enter the mold barrel through the opening and conduit. Attached Figure Description

[0021] This utility model will be described by way of example and with reference to the accompanying drawings, wherein: Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the temperature control box of this utility model when the door is not open or closed. Figure 3 This is a three-dimensional structural diagram of the mold barrel, support, and guide rail of this utility model; Figure 4 This is a three-dimensional structural diagram of the mold barrel and placement plate of this utility model. Among them: 1-temperature control box, 2-door switch, 3-pipe body, 4-pressure valve, 5-air compressor, 6-mold barrel, 7-bracket, 8-guide rail, 9-slide rail, 10-screw, 11-rotating ring, 12-conduit, 13-solution pool, 14-barrel lid, 15-interface, 16-camera, 17-placement plate, 18-placement slot, 19-opening. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0024] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0025] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0026] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0027] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. Example

[0028] like Figures 1-4As shown in the figure, an embodiment of this utility model discloses an asphalt mixture whitening degree test device, including a temperature control chamber 1. A mold barrel 6 is supported by a bracket 7 inside the temperature control chamber 1. A pipe body 3 is connected to the top of the mold barrel 6. The end of the pipe body 3 away from the mold barrel 6 is connected to an air compressor 5. The air compressor 5 is located on one side of the temperature control chamber 1. A solution pool 13 is also provided at the bottom of the temperature control chamber 1. The solution pool 13 is filled with calcium hydroxide solution. A conduit 12 connected to the solution pool 13 is provided at the bottom of the mold barrel 6. It should be noted that in this asphalt mixture whitening test device, the temperature control chamber 1 is made of stainless steel with internal dimensions of 600×500×700mm. The temperature control chamber 1 is used to precisely control the test temperature to simulate the effect of actual road surface temperature environment on asphalt mixture whitening. The bracket 7 supports the mold barrel 6 to place it stably in the temperature control chamber 1 and keep the specimen position fixed. The mold barrel 6 is used to hold the asphalt mixture specimen to provide a carrier for the whitening test. The mold barrel 6 is made of acid and alkali resistant PP material with an inner diameter of 250mm. The pipe body 3 connects the mold barrel 6 to the air compressor 5 to transmit the pressure generated by the air compressor 5. The air compressor 5 applies controllable pressure to the mold barrel 6 through the pipe body 3 to simulate the effect of vehicle load or environmental pressure on asphalt mixture. The solution pool 13 is filled with calcium hydroxide solution as a medium to simulate chemical erosion. The conduit 12 connects the solution pool 13 to the bottom of the mold barrel 6 so that the calcium hydroxide solution can penetrate into the specimen in the mold barrel 6 under pressure. The overall working principle is as follows: Asphalt mixture specimens are placed in mold barrel 6, and calcium hydroxide solution is added to solution tank 13. The temperature control chamber 1 is set to the test temperature, and the air compressor 5 is turned on to apply pressure to mold barrel 6 through pipe 3. The pressure (negative pressure) drives the calcium hydroxide solution in solution tank 13 through conduit 12 into mold barrel 6 and penetrates into the interior of the asphalt mixture. When the solution migrates to the surface of the asphalt layer with water, calcium hydroxide reacts with carbon dioxide in the air to form white calcium carbonate, thus simulating the whitening phenomenon. By adjusting the amount or concentration of calcium hydroxide solution, the alkalinity can be changed to simulate different degrees of chemical erosion. The effect of this device is that by integrating temperature control, pressure application, and chemical solution penetration functions, it achieves the simulation of asphalt mixture whitening under the synergistic effect of multiple factors such as temperature, pressure, and chemical erosion. Compared with single-factor simulation, it is closer to the actual whitening mechanism of road surfaces, providing an effective experimental means for studying the influencing factors of whitening and developing anti-whitening materials.

[0029] like Figure 1 As shown, in this embodiment, the temperature control box 1 has a hinged door 2 on one side.

[0030] like Figure 3As shown, in this embodiment, the mold barrel 6 has a detachable lid 14 on its top, and the lid 14 has an interface 15 that is threadedly connected to the tube body 3. It should be noted that the detachable lid 14 is made of acid and alkali resistant transparent polycarbonate (PC) material, and is threadedly connected to the top of the mold barrel 6. A fluororubber sealing ring is provided on the edge to maintain the seal of the mold barrel 6, and the transparency facilitates direct observation of the specimen state. The lid 14 has a 12mm inner diameter tube body 3 threaded interface 15 at its center, which is sealed and connected to the external thread of the tube body 3 to transmit the pressure of the air compressor 5. A waterproof miniature camera 16 (1080P resolution, 30fps frame rate) is embedded in the top surface of the lid 14. The lens is aimed at the surface of the specimen and connected to an external image analysis device through a data cable to acquire images of the specimen surface in real time. Overall working principle: During installation, tighten the transparent bucket lid 14 and connect it to the pipe body 3. The camera 16 will automatically start after being fixed with the bucket lid 14, and take real-time pictures of the surface of the asphalt mixture specimen inside the mold bucket 6. The camera 16 will simultaneously record the evolution process of surface whitening. The image data will be transmitted to the image analysis device via the data cable. The algorithm in the existing technology will be used to calculate parameters such as the proportion of whitening area and the density of patch distribution, so as to realize the dynamic quantitative monitoring of the degree of whitening.

[0031] like Figure 3 and Figure 4 As shown, in this embodiment, guide rails 8 are provided on both sides of the temperature control chamber 1, and slide rails 9 are provided on both sides of the bracket 7, which are slidably connected to the guide rails 8. It should be noted that the guide rails 8 on both sides of the temperature control chamber 1 are made of 304 stainless steel and are fixed to both sides of the inner wall of the chamber, providing sliding guide tracks for the bracket 7; the slide rails 9 on both sides of the bracket 7 slide in cooperation with the guide rails 8, and are also made of 304 stainless steel with a wear-resistant surface treatment, allowing the bracket 7 to slide smoothly within the temperature control chamber 1, facilitating the loading, unloading, and positioning of the mold barrel 6. During installation, the slide rails 9 on both sides of the bracket 7 are embedded into the guide rails 8 on the inner wall of the temperature control chamber 1, and the bracket 7 is slid along the guide rails 8 to the designated position, ensuring that the mold barrel 6 is accurately positioned above the solution pool 13, and ensuring smooth connection of the conduit 12; during the test, the bracket 7 remains stable through the cooperation of the slide rails 9 and the guide rails 8, preventing displacement due to pressure; after the test, the mold barrel 6 is moved out of the temperature control chamber 1 by sliding the bracket 7 along the guide rails 8, facilitating specimen removal and equipment maintenance. Effect: The sliding connection structure between guide rail 8 and slide rail 9 shortens the loading and unloading time of mold barrel 6, improves operating efficiency, and facilitates adjustment of the position of mold barrel 6.

[0032] like Figure 3 and Figure 4As shown, in this embodiment, a screw 10 is rotatably connected to one of the guide rails 8, and a slide rail 9 is threadedly connected to the screw 10. It should be noted that the screw 10 rotatably connected to the guide rail 8 is made of stainless steel, horizontally installed along the length of the guide rail 8, and rotatably connected to both sides of the guide rail 8 via bearings. A threaded hole matching the screw 10 is opened on the inner side of the slide rail 9. When the screw 10 rotates, the slide rail 9 moves linearly along the length of the guide rail 8, driving the bracket 7 to move synchronously, thus achieving horizontal positioning of the mold barrel 6 within the temperature control chamber 1. Working principle: The screw 10 is driven to rotate by a rotating ring or servo motor. The threaded transmission converts the rotational motion into horizontal displacement of the slide rail 9, causing the bracket 7 to slide along the length of the guide rail 8. Before the test, the mold barrel 6 can be adjusted to the designated position according to the location of the solution pool 13 or the layout of multiple sets of specimens. The self-locking characteristic of the screw 10 ensures that the position is fixed during the test, avoiding displacement under pressure. The limiting blocks on both sides of the guide rail 8 restrict the movement range of the slide rail 9, preventing it from detaching from the guide rail 8. Effect: By setting the screw 10, the positioning error of the traditional sliding bracket 7 is reduced, and the position of the mold barrel 6 can be controlled.

[0033] like Figure 3 As shown, a swivel ring 11 is fixedly connected to one end of the screw 10. It should be noted that the swivel ring 11 is designed to facilitate the operation of the screw 10 by workers.

[0034] like Figure 4 As shown, the support 7 has a placement plate 17 in the middle, and the placement plate 17 has a placement groove 18 for placing the mold barrel 6. The placement groove 18 has an opening 19 through the middle. It should be noted that the placement plate 17 in the middle of the support 7 is made of 304 stainless steel plate, and the surface is sandblasted to increase friction, which is used to support the mold barrel 6; the placement groove 18 is a circular groove with an inner diameter larger than the outer diameter of the mold barrel 6, which restricts the horizontal displacement of the mold barrel 6; the diameter of the circular opening 19 in the middle of the placement groove 18 is aligned with the interface 15 of the conduit 12 at the bottom of the mold barrel 6, ensuring that the calcium hydroxide solution in the solution pool 13 can enter the mold barrel 6 through the opening 19 and the conduit 12.

[0035] like Figure 1 As shown, a pressure valve 4 is provided on the pipe body 3. It should be noted that the pressure valve 4 is used to display the pressure, which is convenient for operators to adjust in real time. The pressure valve 4 adopts existing technology and will not be described in detail here.

[0036] The working principle of this utility model is as follows: Before the experiment begins, the staff opens the hinged door 2 on one side of the temperature control box 1. By rotating the ring 11 at one end of the screw 10, the screw 10 is driven to rotate, causing the slide rail 9, which is threadedly connected to the screw 10, to slide along the length of the guide rail 8. This moves the bracket 7 and the placement plate 17 to the door of the temperature control box 1 for easy operation. The mold barrel 6 is placed in the placement slot 18 of the placement plate 17. The lid 14 on the top of the mold barrel 6 is unscrewed, the asphalt mixture cylindrical specimen is placed in, and the lid 14 is tightened again. The screw 10 is adjusted by the ring 11 to reset the bracket 7, and the mold barrel 6 is precisely positioned above the solution pool 13. At this time, the lower end of the guide tube 12 is immersed in the calcium hydroxide solution filled in the solution pool 13.

[0037] During the test, the switch door 2 is closed, and the temperature control box 1 adjusts the internal temperature to the set value through the PID system; the air compressor 5 is started, and the pressure is transmitted to the mold barrel 6 through the pipe body 3 (the pressure valve 4 on the pipe body 3 displays the pressure value in real time, which is convenient for manual adjustment to the target pressure). The pressure drives the calcium hydroxide solution in the solution pool 13 to seep into the interior of the specimen through the conduit 12 and the opening 19 in the middle of the placement tank 18; the waterproof camera 16 on the barrel lid 14 takes pictures of the surface of the specimen, and the image data is transmitted to the external image analysis device. The proportion of white area is calculated by the algorithm to quantify the degree of whitening.

[0038] The circuits, electronic components, and modules involved are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this utility model does not involve any improvement to the software and methods.

[0039] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0040] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device for testing the degree of whitening in asphalt mixtures, characterized in that, The device includes a temperature control box (1), in which a mold barrel (6) is supported by a bracket (7). A pipe (3) is connected to the top of the mold barrel (6). The end of the pipe (3) away from the mold barrel (6) is connected to an air compressor (5). The air compressor (5) is located on one side of the temperature control box (1). The temperature control box (1) is also provided with a solution pool (13) at the bottom, which is filled with calcium hydroxide solution. The mold barrel (6) is provided with a conduit (12) at the bottom that communicates with the solution pool (13).

2. The asphalt mixture whitening test device according to claim 1, characterized in that, The top of the mold barrel (6) has a removable barrel cover (14), and the barrel cover (14) is provided with an interface (15) that is threadedly connected to the tube body (3).

3. The asphalt mixture whitening test device according to claim 1, characterized in that, The temperature control box (1) is provided with guide rails (8) on both sides, and the bracket (7) is provided with slide rails (9) on both sides that are slidably connected to the guide rails (8).

4. The asphalt mixture whitening test device according to claim 3, characterized in that, A screw (10) is rotatably connected to one of the guide rails (8), and a slide rail (9) is threadedly connected to the screw (10).

5. The asphalt mixture whitening test device according to claim 4, characterized in that, One end of the screw (10) is fixedly connected to a swivel (11).

6. The asphalt mixture whitening test device according to claim 1, characterized in that, The bracket (7) has a placement plate (17) in the middle, and the placement plate (17) has a placement groove (18) for placing the mold barrel (6), and the placement groove (18) has an opening (19) through the middle.

7. The asphalt mixture whitening test device according to claim 1, characterized in that, A pressure valve (4) is provided on the pipe body (3).

8. The asphalt mixture whitening test device according to claim 1, characterized in that, The temperature control box (1) is provided with a hinged door (2) on one side.

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