Device and method for testing high-temperature dynamic contact angle and surface tension of epoxy asphalt

Abstract

The invention discloses a device and a method for testing a high-temperature dynamic contact angle and surface tension of epoxy asphalt. The device comprises a high-temperature environment box, a high-temperature-resistant industrial camera, a high-temperature-resistant optical fiber light cylinder and a sample table, a lifting platform for adjusting the heights of the high-temperature-resistant industrial camera and the sample table is arranged at the bottom of the high-temperature environment box; a sample table is arranged in the high-temperature environment box, a titration device is arranged above the sample table, a micrometer is fixed at the top of the high-temperature environment box, a micrometric screw of the micrometer is provided with a clamping transmission mechanism, and the clamping transmission mechanism is used for controlling titration operation of the titration device. According to the method, the real contact angle form and the dynamic change process of the epoxy asphalt on the surface of the aggregate are visually obtained, so that the surface tension change of the epoxy asphalt in the curing process and the aggregate indirect antenna continuous evolution characteristics are monitored in real time; the accuracy of evaluating the adhesion performance of the epoxy asphalt and the aggregate is improved, and a more reliable technical support is provided for design, construction and quality control of an epoxy asphalt pavement.

Description

Technical Field

[0001] This invention relates to the field of epoxy asphalt measurement technology, and in particular to a device and method for testing the high-temperature dynamic contact angle and surface tension of epoxy asphalt. Background Technology

[0002] With the rapid development of transportation infrastructure construction, the high performance and long service life of pavement materials have become core requirements for the industry. Epoxy asphalt, as a new type of composite material with excellent properties such as high strength, high adhesion, fatigue resistance, and chemical corrosion resistance, has been widely used in engineering fields such as steel bridge deck paving and heavy-duty pavement. Its interfacial adhesion performance with aggregates directly affects the overall stability and durability of the pavement structure. Therefore, accurately characterizing the interfacial interaction mechanism between epoxy asphalt and aggregates has become a key aspect of improving engineering quality.

[0003] Currently, the industry primarily uses indirect calculation methods to test the surface tension and aggregate adhesion of epoxy asphalt. This involves traditional methods such as the Owens epoxy asphalt high-temperature contact angle test device and method, which utilize the contact angle test results of three standard liquids with known surface tension parameters (such as distilled water, glycerol, and diiodomethane) on the epoxy asphalt film surface. The surface free energy and its components of the epoxy asphalt are then calculated and fitted using thermodynamic formulas to derive its surface tension and theoretical adhesion work with different aggregates. While this method can reflect the surface characteristics of epoxy asphalt to some extent, it is essentially an indirect derivation based on the interaction between a liquid and a solid surface, and cannot directly present the actual contact angle morphology and dynamic changes of epoxy asphalt on the aggregate surface.

[0004] To overcome the limitations of indirect calculation methods, some studies have attempted to measure the initial contact angle of epoxy asphalt on the aggregate surface using static contact angle testing devices to assess its initial adhesion state. However, the curing process of epoxy asphalt is a dynamic process accompanied by temperature changes and chemical cross-linking reactions. During this process, its surface tension changes significantly with the degree of curing and temperature field distribution, leading to a continuous evolution of the contact angle with the aggregate. Existing testing methods cannot capture the dynamic changes in surface tension of epoxy asphalt during its transition from liquid to solid state at high temperatures, nor can they monitor the continuous evolution of its contact angle with the aggregate in real time. This results in significant deviations in the assessment of the actual adhesion behavior between epoxy asphalt and aggregate, making it difficult to meet the needs of precise control of interfacial bonding performance in engineering practice. Summary of the Invention

[0005] To address the aforementioned shortcomings of existing technologies, this invention provides a device and method for testing the high-temperature dynamic contact angle and surface tension of epoxy asphalt. This allows for the direct acquisition of the contact angle morphology and dynamic changes of real epoxy asphalt on the aggregate surface, enabling real-time monitoring of surface tension changes and the continuous evolution of contact angles between aggregates during the curing process. By accurately acquiring these dynamic parameters, the accuracy of evaluating the adhesion performance between epoxy asphalt and aggregates is improved, providing more reliable technical support for the design, construction, and quality control of epoxy asphalt pavements, and meeting the needs of engineering practice for precise control of interfacial bonding performance.

[0006] To achieve the above-mentioned objectives, the technical solution adopted by this invention is as follows: A device and method for testing the high-temperature dynamic contact angle and surface tension of epoxy asphalt are provided. The device includes a high-temperature environmental chamber, a high-temperature resistant industrial camera at the bottom of the chamber, a high-temperature resistant fiber optic tube for use with the camera at the right side of the chamber, and a sample stage between the camera and the fiber optic tube. A lifting platform for adjusting the height of the camera and the sample stage is located at the bottom of the chamber. A titration device is positioned above the sample stage, and a micrometer is fixed to the top of the chamber. A clamping and transmission mechanism is mounted on the micrometer's micrometer screw to control the titration operation of the titration device.

[0007] Furthermore, the titration apparatus includes a piston cylinder, a piston rod, and a storage tank. The top of the piston rod is fixedly connected to the clamping and transmission mechanism. The storage tank is barrel-shaped, and the top of the storage tank is threadedly sealed to the bottom of the piston cylinder. A titration needle is provided at the bottom of the storage tank.

[0008] Furthermore, the clamping transmission mechanism includes a transmission frame, an upper fastening screw, and a clamping assembly. The transmission frame is provided with an upper through hole that mates with the micrometer screw. The transmission frame is provided with an upper transverse threaded hole that communicates with the upper through hole. The upper fastening screw is provided in the upper transverse threaded hole. The micrometer screw is provided with a slot that mates with the upper fastening screw.

[0009] Furthermore, the clamping assembly includes a clamping cylinder and a locking sleeve fixed to the bottom of the transmission frame. The clamping cylinder is used to clamp the piston rod. The bottom of the clamping cylinder is tapered. The clamping cylinder is provided with at least two radial deformation openings. The clamping cylinder is threadedly connected to the locking sleeve.

[0010] Furthermore, the bottom of the transmission frame is provided with a lower through hole that mates with the piston rod, and the clamping cylinder is coaxially arranged with the lower through hole.

[0011] Furthermore, the high-temperature environment chamber is equipped with a clamping device for fixing the titration device. The clamping device includes a clamping cantilever fixed on the high-temperature environment chamber. The other end of the clamping cantilever is provided with a vertical through hole for installing the titration device. A lower transverse threaded hole is provided on the side of the vertical through hole, and a lower fastening screw is provided in the lower transverse threaded hole.

[0012] Furthermore, the piston cylinder is made of stainless steel or aluminum alloy.

[0013] Furthermore, a connecting plate is provided at the bottom of the high-temperature environment chamber, and the high-temperature resistant industrial camera and sample stage are both mounted on the connecting plate.

[0014] Furthermore, the front of the high-temperature environment chamber is equipped with an openable and closable high-temperature resistant glass door.

[0015] A method for testing the high-temperature contact angle of epoxy asphalt includes the following steps: S1: First, cut the aggregate to be tested into cubes with a length, width and height of 3cm. Then, use 100-grit, 300-grit, 500-grit, 1000-grit and 5000-grit sandpaper to polish its surface in sequence. Finally, use anhydrous ethanol and water to perform ultrasonic cleaning in sequence to ensure that the surface is clean and flat before placing the aggregate to be tested on the sample stage. S2: Weigh the epoxy resin, curing agent and base asphalt according to the set ratio, stir them evenly, and pour them into the storage tank of the titration device. Then install the storage tank to the bottom of the piston cylinder, install the piston rod in the piston cylinder, and fix the top of the piston rod to the clamping transmission mechanism to make the entire titration device sealed to prevent the epoxy asphalt from flowing out in advance. S3: Connect the power supply to the high temperature environment chamber, set the curing temperature of the corresponding epoxy asphalt, and after 5 minutes of reaching the set curing temperature, accurately push the epoxy asphalt in the storage tank into the burette by adjusting the knob end of the micrometer. S4: Connect the power supply of the high-temperature resistant fiber optic tube and the high-temperature resistant industrial camera. The lifting platform raises the sample stage to the same height as the tip of the burette. The micrometer is adjusted to drive the piston rod to rise and fall, controlling the epoxy asphalt sample in the burette to be squeezed out and droplet-shaped at the needle tip. The high-temperature resistant industrial camera continuously photographs the morphology of the epoxy asphalt droplets during the high-temperature curing process, obtains the morphology of the epoxy asphalt droplets at different curing times, and calculates the dynamic surface tension of the epoxy asphalt. S5: After the epoxy asphalt reaches the set curing temperature and is maintained for 5 minutes, the sample stage is lifted by the lifting platform, so that the sample stage moves to the tip of the burette needle. The sample stage lightly touches the droplet-shaped epoxy asphalt at the tip of the burette needle, so that it wets the surface of the sample stage. The height of the sample stage and the high-temperature industrial camera is lowered so that the sample stage and the high-temperature industrial camera are level. The contact angle dynamic change of the epoxy asphalt on the surface of the sample stage is captured by the high-temperature industrial camera.

[0016] The beneficial effects of this invention are as follows: This invention places the entire contact angle measuring device in a high-temperature environmental chamber to avoid errors caused by temperature conduction. A dedicated storage tank is provided for epoxy asphalt, facilitating timely sample replacement and subsequent cleaning. The micrometer's micrometer screw is connected to a clamping and transmission mechanism, which is fixedly connected to the piston rod via a clamping sleeve and locking sleeve. This connects the micrometer to the piston rod, enabling precise control of the titration operation through the micrometer.

[0017] This invention addresses the limitation of existing indirect calculation methods that cannot directly obtain the true contact morphology of the epoxy asphalt-aggregate interface. By developing a dynamic contact angle testing device under high-temperature conditions, it enables real-time in-situ observation of the surface tension changes of epoxy asphalt and the contact angle of the epoxy asphalt-aggregate interface during the curing process. This not only overcomes the limitations of traditional indirect derivation methods such as the Owens method, but also allows for the intuitive capture of the dynamic evolution of the contact angle with temperature changes and chemical cross-linking reactions.

[0018] The micrometer of this invention drives the titration device to perform titration operations through a clamping and transmission mechanism. Utilizing the micrometer's fine-tuning function, precise titration of epoxy asphalt is achieved. A threaded seal is used between the storage tank and the piston cylinder. The micrometer, combined with the titration device, ensures stable droplet volume. The integrated design combines storage, transport, and titration functions, avoiding sample transfer errors inherent in traditional separate devices and significantly improving the stability and data repeatability of material transport during high-temperature dynamic testing.

[0019] This invention is specifically designed to monitor the changes in surface tension and contact angle between aggregates of epoxy asphalt samples during different curing processes. Compared with traditional fitting calculations, it is more accurate and better reflects the adhesion between epoxy asphalt and aggregates at different curing stages.

[0020] This invention provides a direct view of the contact angle morphology and dynamic changes of real epoxy asphalt on aggregate surfaces, overcoming the limitations of existing indirect calculation methods that cannot be directly observed. It enables real-time monitoring of surface tension changes and the continuous evolution of contact angles between aggregates during the curing process of epoxy asphalt, clarifying the dynamic influence mechanism of curing reaction and temperature changes on interfacial interactions. This invention accurately acquires these dynamic parameters, improving the accuracy of evaluating the adhesion performance between epoxy asphalt and aggregates, providing more reliable technical support for the design, construction, and quality control of epoxy asphalt pavements, and meeting the needs of engineering practice for precise control of interfacial adhesion performance. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the titration apparatus; Figure 3 Schematic diagram of the clamping transmission mechanism Figure 1 ; Figure 4 Schematic diagram of the clamping transmission mechanism Figure 2 ; Figure 5 Figures showing the liquid morphology of epoxy asphalt at different curing times; Figure 6 Computer-fitted images of the liquid morphology of epoxy asphalt at different curing times; Figure 7 This is a graph showing the variation of the contact angle between epoxy asphalt and limestone aggregate at different curing times. The symbols for the main components in the diagram are explained below: 1. High-temperature environmental chamber; 2. Connecting plate; 3. High-temperature resistant industrial camera; 4. Lifting platform; 5. Sample stage; 6. High-temperature resistant fiber optic tube; 7. Clamping device; 71. Lower fastening screw; 8. Titration apparatus; 81. Piston cylinder; 82. Piston rod; 83. Storage tank; 84. Titration needle; 9. Micrometer; 10. Clamping and transmission mechanism; 101. Transmission frame; 102. Upper fastening screw; 103. Clamping sleeve; 104. Radial deformation opening; 105. Locking sleeve. Detailed Implementation

[0022] The specific embodiments of the present invention are described below to enable those skilled in the art to understand the present invention. However, it should be understood that the present invention is not limited to the scope of the specific embodiments. For those skilled in the art, various changes are obvious as long as they are within the spirit and scope of the present invention as defined and determined by the appended claims. All inventions utilizing the concept of the present invention are protected.

[0023] like Figure 1As shown, a high-temperature dynamic contact angle and surface tension testing device for epoxy asphalt includes a high-temperature environmental chamber 1. A high-temperature resistant industrial camera 3 is installed at the bottom of the high-temperature environmental chamber 1. A high-temperature resistant fiber optic tube 6, which works in conjunction with the high-temperature resistant industrial camera 3, is installed on the right side of the high-temperature environmental chamber 1. A sample stage 5 is installed between the high-temperature resistant industrial camera 3 and the high-temperature resistant fiber optic tube 6. A lifting platform 4 is installed at the bottom of the high-temperature environmental chamber 1 to adjust the height of the high-temperature resistant industrial camera 3 and the sample stage 5. A titration device 8 is installed above the sample stage 5. A micrometer 9 is fixed on the top of the high-temperature environmental chamber 1. A clamping and transmission mechanism 10 is installed on the micrometer screw of the micrometer 9. The clamping and transmission mechanism 10 is used to control the titration operation of the titration device. A through hole for mounting a micrometer 9 is provided on the top of the high-temperature environment chamber 1. The micrometer 9 is fixed in the through hole, and the micrometer screw of the micrometer 9 is located inside the high-temperature environment chamber 1. The screwing end of the micrometer 9 is located outside the high-temperature environment chamber 1. The extension and retraction of the micrometer screw is adjusted by the screwing end of the micrometer 9, thereby controlling the titration device 8 to perform titration operations through the clamping transmission mechanism 10.

[0024] like Figure 2 As shown, the titration apparatus 8 includes a piston cylinder 81, a piston rod 82, and a storage tank 83. The piston cylinder 81 is preferably a stainless steel or aluminum alloy cylinder. The top of the piston rod 82 is fixedly connected to the clamping and transmission mechanism 10. The storage tank 83 is barrel-shaped, with its top threadedly sealed to the bottom of the piston cylinder 81. A burette needle 84 is located at the bottom of the storage tank 83. The piston rod 82 and the piston cylinder 81 form a sealed space. By controlling the piston position of the piston rod 82, the epoxy asphalt in the storage tank 83 is controlled to drip from the burette needle 84.

[0025] like Figure 3 and 4As shown, the clamping transmission mechanism 10 includes a transmission frame 101, an upper fastening screw 102, and a clamping assembly. The transmission frame 101 is provided with an upper through hole that mates with the micrometer screw of the micrometer 9. The transmission frame 101 is also provided with an upper transverse threaded hole that communicates with the upper through hole. The upper fastening screw 102 is installed in the upper transverse threaded hole. The micrometer screw of the micrometer 9 is provided with a slot that mates with the upper fastening screw 102. By engaging the upper fastening screw 102 with the slot on the micrometer screw, the micrometer screw of the micrometer 9 is fixedly connected to the transmission frame 101. The position of the piston rod 82 is adjusted by controlling the micrometer screw of the micrometer 9. The clamping assembly includes a clamping cylinder 103 and a locking sleeve 105 fixed to the bottom of the transmission frame 101. The clamping cylinder 103 is used to clamp the piston rod 82. The bottom of the clamping cylinder 103 is tapered, and at least two radial deformation openings 104 are provided on the clamping cylinder 103. The clamping cylinder 103 is threadedly connected to the locking sleeve 105. Specifically, the locking sleeve 105 clamps the piston rod 82 by twisting and pressing the clamping cylinder 103, thereby using the radially deformable clamping cylinder 103 to clamp the piston rod 82, thus realizing the connection between the clamping transmission mechanism 10 and the piston rod 82. A lower through hole that mates with the piston rod 82 is provided at the bottom of the transmission frame 101. The clamping cylinder 103 is coaxially arranged with the lower through hole. The top of the piston rod 82 can pass through the transmission frame 101 through the lower through hole, so that the transmission frame 101 can better adapt to the length of the piston rod 82.

[0026] A clamping device 7 for fixing a titration apparatus 8 is provided on the high-temperature environment chamber 1. The clamping device 7 includes a clamping cantilever fixed to the high-temperature environment chamber 1. A vertical through hole for mounting and fixing the titration apparatus 8 is provided at the other end of the clamping cantilever. A lower horizontal threaded hole is provided on the side of the vertical through hole, and a lower fastening screw 71 is provided in the lower horizontal threaded hole. The clamping cantilever is made of stainless steel or aluminum alloy. Specifically, the lower fastening screw 71 is provided on the clamping cantilever, and the piston cylinder 81 of the titration apparatus 8 is installed in the vertical through hole. The piston cylinder 81 can be fixed by the lower fastening screw 71, thereby fixing the titration apparatus 8 to the clamping device 7.

[0027] A connecting plate 2 is provided at the bottom of the high-temperature environment chamber 1. The high-temperature resistant industrial camera 3 and the sample stage 5 are both mounted on the connecting plate 2. With the high-temperature resistant industrial camera 3 and sample stage 5 placed on the same connecting plate 2, the high-temperature resistant industrial camera 3 and sample stage 5 are mounted on the same axis within the high-temperature environment chamber 1 via the connecting plate 2. The titration device 8 is installed directly above the sample stage 5. The operating height of the high-temperature resistant industrial camera 3 can be adjusted via a lifting platform 4. A high-temperature resistant glass door that can be opened and closed is provided on the front of the high-temperature environment chamber 1. The high-temperature resistant glass door provides insulation for the high-temperature environment chamber 1 while also allowing for convenient observation of the testing operations within the chamber.

[0028] A testing method for a high-temperature dynamic contact angle and surface tension testing device for epoxy asphalt includes the following steps: S1: First, cut the aggregate to be tested into cubes with a length, width and height of 3cm. Then, use 100-grit, 300-grit, 500-grit, 1000-grit and 5000-grit sandpaper to polish its surface in sequence. Finally, use anhydrous ethanol and water to perform ultrasonic cleaning in sequence to ensure that the surface is clean and flat before placing the aggregate to be tested on the sample stage 5. S2: Weigh the epoxy resin, curing agent, and base asphalt according to a total mass of 100g and a weight ratio of 56:44:100. Mix them thoroughly and pour them into the storage tank 83 of the titration device 8. Install the storage tank 83 at the bottom of the piston cylinder 81. Insert the piston rod 82 into the piston cylinder 81 and fix the top of the piston rod 82 to the clamping transmission mechanism 10 to make the entire titration device 8 sealed and prevent the epoxy asphalt from flowing out prematurely. S3: Connect the power supply to the high temperature environment chamber 1, set the temperature to 150℃, set the curing temperature of the corresponding epoxy asphalt, and after 5 minutes of reaching the set curing temperature, accurately push the epoxy asphalt in the storage tank 83 into the burette 84 by adjusting the knob end of the micrometer 9. S4: Connect the power supply to the high-temperature resistant fiber optic tube 6 and the high-temperature resistant industrial camera 3. The lifting platform 4 raises the sample stage 5 to the same height as the tip of the burette 84. Adjust the micrometer 9 to move the piston rod 82 up and down, controlling the epoxy asphalt sample in the burette 84 to be extruded and droplet-shaped at the needle tip. The high-temperature resistant industrial camera 3 continuously captures the morphology of the epoxy asphalt droplets during the high-temperature curing process, obtaining epoxy asphalt morphology images at different curing times, and calculating the dynamic surface tension of the epoxy asphalt. The results are as follows: Figure 5 and 6 and Table 1; exist Figure 5 In the figure, Figure (a), Figure (b), Figure (c) and Figure (d) correspond to curing time of 0 min, curing time of 20 min, curing time of 40 min and curing time of 60 min, respectively; exist Figure 6 In the figure, Figure (a), Figure (b), Figure (c) and Figure (d) correspond to curing time of 0 min, curing time of 20 min, curing time of 40 min and curing time of 60 min, respectively; Table 1: Surface tension of epoxy asphalt at different curing times

[0029] S5: After the epoxy asphalt reaches the set curing temperature and is maintained for 5 minutes, the aggregate to be tested on the sample stage 5 is lifted by the lifting platform 4, so that the aggregate to be tested moves to the tip of the burette needle 84. The aggregate to be tested lightly touches the droplet-shaped epoxy asphalt at the tip of the burette needle 84, allowing it to wet the surface of the aggregate to be tested. The height of the sample stage 5 and the high-temperature industrial camera 3 is lowered so that the sample stage 5 and the high-temperature industrial camera 3 are level. The high-temperature industrial camera 3 is used to photograph the dynamic change of the contact angle of the epoxy asphalt on the surface of the aggregate during the curing process. The test results are as follows: Figure 7 As shown in Table 2.

[0030] Table 2: Contact angles between epoxy asphalt and limestone aggregate at different curing times

[0031] exist Figure 7 In the figure, Figure (a), Figure (b) and Figure (c) correspond to curing for 20 min, curing for 40 min and curing for 60 min, respectively.

Claims

1. A device for testing the high-temperature dynamic contact angle and surface tension of epoxy asphalt, characterized in that, The system includes a high-temperature environment chamber (1), a high-temperature resistant industrial camera (3) is installed at the bottom of the high-temperature environment chamber (1), a high-temperature resistant fiber optic tube (6) is installed on the right side of the high-temperature environment chamber (1) to cooperate with the high-temperature resistant industrial camera (3), and a sample stage (5) is installed between the high-temperature resistant industrial camera (3) and the high-temperature resistant fiber optic tube (6). The bottom of the high temperature environment chamber (1) is equipped with a lifting platform (4) for adjusting the height of the high temperature resistant industrial camera (3) and the sample stage (5). A titration device (8) is provided above the sample stage (5), and a micrometer (9) is fixed on the top of the high temperature environment chamber (1). A clamping transmission mechanism (10) is provided on the micrometer screw of the micrometer (9). The clamping transmission mechanism (10) is used to control the titration operation of the titration device.

2. The epoxy asphalt high-temperature dynamic contact angle and surface tension testing device according to claim 1, characterized in that, The titration device (8) includes a piston cylinder (81), a piston rod (82) and a storage tank (83). The top of the piston rod (82) is fixedly connected to the clamping transmission mechanism (10). The storage tank (83) is barrel-shaped. The top of the storage tank (83) is threadedly sealed to the bottom of the piston cylinder (81). A titration needle (84) is provided at the bottom of the storage tank (83).

3. The epoxy asphalt high-temperature dynamic contact angle and surface tension testing device according to claim 2, characterized in that, The clamping transmission mechanism (10) includes a transmission frame (101), an upper fastening screw (102), and a clamping assembly. The transmission frame (101) is provided with an upper through hole that mates with the micrometer screw of the micrometer (9). The transmission frame (101) is provided with an upper transverse threaded hole that communicates with the upper through hole. The upper fastening screw (102) is provided in the upper transverse threaded hole. The micrometer screw of the micrometer (9) is provided with a slot that mates with the upper fastening screw (102).

4. The epoxy asphalt high-temperature dynamic contact angle and surface tension testing device according to claim 3, characterized in that, The clamping assembly includes a clamping cylinder (103) and a locking sleeve (105) fixed to the bottom of the transmission frame (101). The clamping cylinder (103) is used to clamp the piston rod (82). The bottom of the clamping cylinder (103) is tapered. The clamping cylinder (103) is provided with at least two radial deformation openings (104). The clamping cylinder (103) is threadedly connected to the locking sleeve (105).

5. The epoxy asphalt high-temperature dynamic contact angle and surface tension testing device according to claim 4, characterized in that, The bottom of the transmission frame (101) is provided with a lower through hole that cooperates with the piston rod (82), and the clamping cylinder (103) is coaxially arranged with the lower through hole.

6. The epoxy asphalt high-temperature dynamic contact angle and surface tension testing device according to claim 1, characterized in that, The high-temperature environment chamber (1) is provided with a clamping device (7) for fixing the titration device (8). The clamping device (7) includes a clamping cantilever fixed on the high-temperature environment chamber (1). The other end of the clamping cantilever is provided with a vertical through hole for installing the titration device (8). A lower horizontal threaded hole is provided on the side of the vertical through hole. A lower fastening screw (71) is provided in the lower horizontal threaded hole.

7. The epoxy asphalt high-temperature dynamic contact angle and surface tension testing device according to claim 2, characterized in that, The piston cylinder (81) is a stainless steel cylinder or an aluminum alloy cylinder.

8. The epoxy asphalt high-temperature dynamic contact angle and surface tension testing device according to claim 1, characterized in that, The high-temperature environment chamber (1) is provided with a connecting plate (2) at the bottom, and the high-temperature resistant industrial camera (3) and the sample stage (5) are both provided on the connecting plate (2).

9. The epoxy asphalt high-temperature dynamic contact angle and surface tension testing device according to claim 1, characterized in that, The high-temperature environment chamber (1) is equipped with an openable and closable high-temperature resistant glass door on the front side.

10. A test method for the epoxy asphalt high-temperature dynamic contact angle and surface tension testing device according to any one of claims 1-9, characterized in that, Includes the following steps: S1: First, cut the aggregate to be tested into a cube with a length, width and height of 3cm. Then, use 100 mesh, 300 mesh, 500 mesh, 1000 mesh and 5000 mesh sandpaper to polish its surface in turn. Finally, use anhydrous ethanol and water to perform ultrasonic cleaning in turn. After ensuring that the surface is clean and flat, place the aggregate to be tested on the sample stage (5). S2: Weigh epoxy resin, curing agent and base asphalt according to the set ratio, stir them evenly, and pour them into the storage tank (83) of the titration device (8). Then install the storage tank (83) to the bottom of the piston cylinder (81), install the piston rod (82) in the piston cylinder (81), and fix the top of the piston rod (82) to the clamping transmission mechanism (10) so that the entire titration device (8) is sealed to prevent the epoxy asphalt from flowing out in advance. S3: Connect the power supply of the high temperature environment chamber (1), set the curing temperature of the corresponding epoxy asphalt, and after 5 minutes of reaching the set curing temperature, precisely push the epoxy asphalt in the storage tank (83) into the burette (84) by adjusting the knob end of the micrometer (9). S4: Connect the power supply of the high-temperature resistant fiber optic tube (6) and the high-temperature resistant industrial camera (3). The lifting platform (4) raises the high-temperature resistant industrial camera (3) to the same height as the tip of the burette (84). Adjust the micrometer (9) to drive the piston rod (82) to rise and fall, control the epoxy asphalt sample in the burette (84) to be squeezed out and droplet-shaped at the needle tip. The high-temperature resistant industrial camera (3) continuously photographs the morphology of epoxy asphalt droplets during the high-temperature curing process, obtains the morphology of epoxy asphalt droplets under different curing times, and calculates the dynamic surface tension of epoxy asphalt. S5: After the epoxy asphalt reaches the set curing temperature and is maintained for 5 minutes, the sample stage (5) is lifted by the lifting platform (4) so ​​that the sample stage (5) moves to the tip of the burette (84). The sample stage (5) touches the droplet-shaped epoxy asphalt at the tip of the burette (84) so ​​that it wets the surface of the sample stage (5). The height of the sample stage (5) and the high temperature resistant industrial camera (3) is lowered so that the sample stage (5) and the high temperature resistant industrial camera (3) are level. The high temperature resistant industrial camera (3) is used to photograph the dynamic change of the contact angle of the epoxy asphalt on the surface of the sample stage (5) during the curing process.

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