Built-in hydrodynamic pressure environment erosion asphalt material observation test device and method

Abstract

The application provides a built-in hydrodynamic pressure environment erosion asphalt material observation test device and method, and relates to the technical field of road engineering monitoring test. The observation bin part, the sample bin part and the background light source bin part are arranged from top to bottom in the device, the observation bin part is sealed and enclosed by a stainless steel container B and a transparent quartz round cover B, and a miniature high-definition camera, an LED lamp strip and a mobile power supply are arranged in the observation bin part; the background light source bin part is sealed and enclosed by a stainless steel container A and a transparent quartz round cover A, and an LED background light source is arranged in the background light source bin part; the observation bin part and the background light source bin part are fixed by a screw rod and a support sleeve, and the space formed between the observation bin part and the background light source bin part is the sample bin part, which is completely exposed to the dynamic water pressure environment. The device can realize quick and effective observation and quantitative analysis on the surface morphology feature evolution law of the asphalt material by means of illumination and image acquisition means, and comprehensively reveals the water damage mechanism, thereby laying a foundation for long-life design and toughness improvement of the multi-physical field coupled asphalt pavement.

Description

Technical Field

[0001] This invention relates to the field of road engineering monitoring and testing technology, and in particular to a built-in dynamic water pressure environment erosion asphalt material observation and testing device and method. Background Technology

[0002] Global warming is causing the precipitation line in my country to gradually shift northward, leading to increasingly frequent summer rainfall in northern regions. This makes the dynamic water pressure environment created by the interaction of vehicle wheels, road surface, and accumulated water increasingly challenging for asphalt pavements. Consequently, water damage induced by asphalt material erosion is receiving growing attention. In addition to using traditional testing techniques to assess the performance degradation of asphalt materials before and after dynamic water pressure erosion, such as examining the rheological properties of asphalt, the high and low temperature properties of asphalt mixtures, and fatigue properties, direct observation is crucial for quantitatively analyzing the morphological evolution of asphalt materials during continuous erosion. This is highly beneficial for understanding the water damage mechanisms related to dynamic water pressure environments and is of great significance for addressing the service challenges of asphalt pavements in many parts of my country under dynamic water pressure conditions.

[0003] The metal containers used in experimental instruments to generate high-temperature, high-pressure dynamic water pressure environments are typically sealed and opaque, making it difficult to directly observe the erosion process of asphalt materials. This hinders the development of research on the service safety of asphalt materials in dynamic water pressure-related multiphysics coupled environments. Some studies have attempted to extract the dynamic water pressure environment from the sealed container of the experimental instrument using the principle of communicating vessels, and then observe the erosion process of asphalt materials in a transparent chamber. However, this experimental method often faces significant challenges in terms of the experimental cost of establishing a stable dynamic water pressure environment in the transparent chamber. For example, it requires high overall performance in terms of the transparent chamber's sealing, insulation, and the accuracy of multi-sensor monitoring, making the experiment of observing the erosion process of asphalt materials under dynamic water pressure very complex and with low error tolerance.

[0004] If the erosion process observation test platform is directly integrated into the closed container of the dynamic water pressure environment of existing laboratory instruments, it can ensure that the asphalt material is exposed to a stable water environment with precisely controlled temperature and dynamic water pressure parameters for erosion. This allows the test focus to be on the effective observation of the eroded morphological characteristics of the asphalt material, which will greatly reduce the redundancy in the design of the observation test platform and improve the reliability and success rate of the test. Therefore, in order to quickly and effectively observe the process characteristics of asphalt material erosion in a dynamic water pressure environment, it is necessary to develop a targeted built-in erosion process observation test platform and method. Summary of the Invention

[0005] To address the aforementioned technical problems in existing technologies, this invention provides a built-in dynamic water pressure environment erosion observation and testing device and method for asphalt materials, enabling rapid and effective observation and quantitative characterization of the evolution of erosion process characteristics. The technical solution is as follows:

[0006] An internal dynamic water pressure environment erosion asphalt material observation and testing device, the device includes an observation chamber component, a sample holding chamber component, and a background light source chamber component;

[0007] The observation chamber consists of a stainless steel container B, a transparent quartz dome B, a miniature high-definition camera, an LED light strip, and a power bank. The stainless steel container B and the transparent quartz dome B are tightly connected at the flange B by bolts and screws. The miniature high-definition camera, LED light strip, and power bank are placed inside the observation chamber formed by the stainless steel container B and the transparent quartz dome B, with the miniature high-definition camera facing the center of the transparent quartz dome B.

[0008] The background light source compartment consists of a stainless steel container A, a transparent quartz round cover A, and an LED background light source. The stainless steel container A and the transparent quartz round cover A are tightly connected at the flange A by bolts and screws. The LED background light source is placed in the middle of the inside of the stainless steel container, facing the transparent quartz round cover A. The LED background light source is self-powered.

[0009] The transparent quartz round cover A is placed under the transparent quartz round cover B, and the two are fixed by a screw (with a support sleeve on the outside of the screw). The space formed between the two is completely exposed to the dynamic water pressure environment. The space formed by the transparent quartz round cover A and the transparent quartz round cover B is used to place the sample holding chamber component.

[0010] The sample container component consists of an asphalt-coated glass slide and a glass slide fixing clip. The asphalt material is prepared in the form of a coating on the middle position of the asphalt-coated glass slide. The asphalt-coated glass slide is placed at the top center of the transparent quartz round cover A. The glass slide fixing clip is covered on the asphalt-coated glass slide and fixed by a support sleeve.

[0011] O-rings are provided between the stainless steel container A and the transparent quartz round cover A, and between the stainless steel container B and the transparent quartz round cover B.

[0012] The LED light strip is located on the inner side wall of the stainless steel container B and is powered by a power supply wire, providing a light source for the miniature high-definition camera located in the middle of the stainless steel container.

[0013] The stainless steel container B is equipped with a handle on the top of its outer side to facilitate the movement of the entire observation and testing platform.

[0014] The stainless steel container B has a diameter of 50-150mm and a height of 50-150mm; the stainless steel container A has a diameter of 50-150mm and a height not exceeding 50mm; the overall height of the support sleeve does not exceed 100mm.

[0015] The support sleeve is a two-part structure with a hollow inner diameter to ensure that the screw can pass through, and the glass slide fixing clip can be clamped between the upper and lower parts of the sleeve.

[0016] A circular observation hole is provided at the center of the slide fixing clamp, so that the erosion process of the asphalt coating glass slide exposed to the dynamic water pressure environment can be directly observed by a miniature high-definition camera through the transparent quartz round cover B and the circular observation hole. The diameter of the circular observation hole is 10-150mm. The asphalt coating glass slide is fixed by the squeezing of the slide fixing clamp.

[0017] The diameter of the asphalt material sample for the asphalt coating glass slide is 10-100 mm and the thickness is no more than 10 mm.

[0018] The transparent quartz dome A and transparent quartz dome B are completely transparent and do not refract light.

[0019] Preferably, the light source can be an LED light strip or an LED circular lamp holder, wherein the width of the LED light strip is 1-10mm, the diameter of the LED circular lamp holder is 50-150mm, and the power supply can be self-powered or externally powered.

[0020] The application method of the observation and testing device includes the following steps:

[0021] S1. Turn on the LED light strip inside the observation chamber component, the miniature high-definition camera, and the LED background light source inside the background light source chamber component respectively. Assemble the observation chamber component and the background light source chamber component respectively using bolts and screws. At the same time, prepare a glass slide with an asphalt coating film of the required thickness for the test.

[0022] S2. Place the asphalt-coated glass slide and the glass slide fixing clip in the middle of the top of the transparent quartz round cover A in sequence. Use bolts, screws and support sleeves to assemble the observation chamber component, the sample holding chamber component and the background light source chamber component to form an overall observation test platform.

[0023] S3. The observation and test platform is moved as a whole to the dynamic water pressure environment of the sealed container of the indoor laboratory instrument by means of the handle. The asphalt coating glass slide is completely exposed to the water environment and continuously subjected to erosion. A miniature high-definition camera is used to observe the changes in the surface morphology of the asphalt material, and the impact data is transmitted to the external analysis device in real time to analyze the characteristics and evolution of the erosion process.

[0024] The beneficial effects of the technical solutions provided in the embodiments of the present invention include at least the following:

[0025] In the above scheme, the stainless steel containers of the observation chamber and the background light source chamber are assembled in an "inverted" manner, and the whole is built into a sealed container. By setting up lighting, image acquisition and other components, it is possible to directly observe and quantitatively characterize the evolution process of the surface morphology of the asphalt coating glass slide that is continuously eroded in a constant temperature and stable dynamic water pressure environment. This allows the focus of the observation experiment to be solely on how to clearly observe the erosion process. Compared with the test method using an external connector, this invention eliminates the need to worry about ensuring that the sample is exposed to a constant temperature and stable dynamic water pressure environment. This greatly reduces the redundancy in the design of the observation test platform and improves the reliability and success rate of the test.

[0026] Furthermore, this invention employs a high-definition camera to observe and quantitatively characterize the evolution of surface morphology features of asphalt materials subjected to erosion in a dynamic water pressure environment. This is beneficial for explaining the development process of damage caused by water erosion in asphalt materials. Combined with multi-scale material performance degradation test data, it can achieve a comprehensive revelation of the water damage mechanism, laying the foundation for the long-life design and toughness improvement of asphalt pavements coupled with multi-physics fields. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of a built-in dynamic water pressure environment erosion asphalt material observation and testing device provided in an embodiment of the present invention;

[0029] Figure 2 This is a top view of the observation chamber component in the observation and testing device provided in this embodiment of the invention;

[0030] Figure 3 This is a top view of the sample holding chamber component in the observation and testing device provided in this embodiment of the invention.

[0031] Among them: 1-Stainless steel container A; 2-Transparent quartz round cover A; 3-Flange A; 4-Screw; 5-Bolt; 6-Support sleeve; 7-O-ring seal; 8-Power supply; 9-LED light strip; 10-Wire; 11-Miniature high-definition camera; 12-Handle; 13-LED background light source; 14-Asphalt-coated glass slide; 15-Slide fixing clip; 16-Observation hole; 17-Asphalt material; 18-Stainless steel container B; 19-Transparent quartz round cover B; 20-Flange B. Detailed Implementation

[0032] The technical solution of the present invention will now be described with reference to the accompanying drawings.

[0033] In embodiments of the present invention, words such as "exemplarily," "for example," etc., are used to indicate that something is an example, illustration, or description. Any embodiment or design described as "exemplary" in the present invention should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of the word "exemplary" is intended to present the concept in a concrete manner. Furthermore, in embodiments of the present invention, the meaning expressed by "and / or" can be both, or either one.

[0034] To make the technical problems, technical solutions and advantages of the present invention clearer, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0035] This invention provides a built-in dynamic water pressure environment erosion test device and method for asphalt materials. For example... Figure 1 The diagram shows a built-in dynamic water pressure environment erosion test device for asphalt materials. The device includes an observation chamber component, a sample holding chamber component, and a background light source chamber component.

[0036] The observation chamber consists of a stainless steel container B18, a transparent quartz dome B19, a miniature high-definition camera 11, an LED light strip 9, and a power supply 8. The stainless steel container B18 and the transparent quartz dome B19 are tightly connected at the flange B20 by bolts 5 and screws 4. The miniature high-definition camera 11, the LED light strip 9, and the power supply 8 are placed inside the observation chamber formed by the stainless steel container B18 and the transparent quartz dome B19, with the miniature high-definition camera 11 facing the center of the transparent quartz dome B19.

[0037] The background light source compartment consists of a stainless steel container A1, a transparent quartz round cover A2, and an LED background light source 13. The stainless steel container A1 and the transparent quartz round cover A2 are tightly connected at the flange A3 by bolts 5 and screws 4. The LED background light source 13 is placed in the middle of the inside of the stainless steel container A1, and the LED background light source 13 faces the transparent quartz round cover A2.

[0038] The transparent quartz round cover A2 is placed under the transparent quartz round cover B19, and the two are fixed by the screw 4 (the screw 4 is covered with a support sleeve 6). The space formed between the two is completely exposed to the dynamic water pressure environment. The space formed by the transparent quartz round cover A2 and the transparent quartz round cover B19 is used to place the sample holding chamber component.

[0039] The support sleeve is a two-part structure with an upper and lower section. The hollow inner diameter of the support sleeve ensures that the screw can pass through, and the glass slide fixing clip can be clamped between the upper and lower parts of the sleeve.

[0040] like Figure 3The sample container component consists of an asphalt-coated glass slide 14 and a glass slide fixing clip 15. The asphalt material is prepared in the form of a coating on the middle position of the asphalt-coated glass slide 14. The asphalt-coated glass slide 14 is placed at the top center of the transparent quartz round cover A1. The glass slide fixing clip 15 covers the asphalt-coated glass slide 14 and is fixed by the support sleeve 6.

[0041] like Figure 2 O-rings 7 are provided between the stainless steel container A1 and the transparent quartz round cover A2, and between the stainless steel container B18 and the transparent quartz round cover B19.

[0042] The LED light strip 9 is located on the inner side wall of the stainless steel container B19 and is powered by a power supply 8 connected to a wire 10.

[0043] The stainless steel container B18 is provided with a handle 12 on the top of its outer side.

[0044] A circular observation hole 16 is provided at the center of the slide fixing clamp 15, so that the erosion process of the asphalt coating slide exposed to the dynamic water pressure environment can be directly observed by a miniature high-definition camera through the transparent quartz round cover B and the circular observation hole.

[0045] The following description, in conjunction with specific embodiments, illustrates this point.

[0046] The experimental process for observing the evolution of the characteristics of asphalt materials under continuous erosion in a dynamic water pressure environment using the built-in observation and testing platform of this invention is as follows:

[0047] (1) Set the stainless steel container B18 of the observation chamber component to have an inner diameter of 100mm and an inner height of 100mm. Select an 8mm wide LED strip 9 and evenly paste it on the inner wall of the stainless steel container B18. Set the stainless steel container A1 of the background light source chamber component to have an inner diameter of 100mm and an inner height of 20mm. Select a self-powered thin circular lamp holder as the LED background light source 13. Assemble the stainless steel containers of the observation chamber component and the background light source chamber component in an "inverted" manner. The height of the support sleeve 6 of the sample holding chamber component in the space formed is set to 50mm (the support sleeve is divided into upper and lower parts according to the thickness of the asphalt coating glass slide and the installation position of the glass slide fixing clip).

[0048] (2) Open the LED light strip 9, miniature high-definition camera 11 and LED background light source 13 inside the observation chamber component respectively, and assemble the observation chamber component and the background light source component respectively using bolts 5 and screws 4; select a glass slide with a diameter of 50mm to prepare a pitch coating glass slide 14 with precise thickness control, and control the thickness to 1mm;

[0049] (3) Place the asphalt-coated glass slide 14 and the glass slide fixing clip 15 in the middle of the top of the transparent quartz round cover A2 of the background light source chamber component. The diameter of the circular observation hole 16 is 40mm. Use bolts 5, screws 4 and support sleeves 6 to assemble the observation chamber component, the sample holding chamber component and the background light source chamber component to form an overall observation test platform.

[0050] (4) The observation and test platform was moved as a whole to the sealed container of the indoor laboratory instrument by the handle 12 to simulate a typical dynamic water pressure environment (water temperature 60℃, water pressure level 0.4MPa). The asphalt coating glass slide 14 was completely exposed to the water environment and continuously subjected to 3500 cycles of erosion. The surface morphology changes of the asphalt material were observed by a wireless self-powered miniature high-definition camera 11, and the evolution law of the erosion process characteristics was quantitatively analyzed.

[0051] The present invention can be well realized according to the above method. By directly embedding the observation and test platform assembled in the form of "inverted" into a sealed container, the asphalt material is completely exposed to a constant temperature and stable dynamic water pressure environment and continuously subjected to erosion. With the help of lighting and image acquisition, the evolution law of surface morphology characteristics of asphalt material can be quickly and effectively observed and quantitatively analyzed, and the water damage mechanism can be comprehensively revealed, laying the foundation for the long life design and toughness improvement of multi-physics field coupled asphalt pavement.

[0052] In practical applications, the device of the present invention can also be used for the observation of hydrodynamic pressure environment erosion of other samples. For example, if the sample is thick, only the transparent quartz round cover A of the background light source chamber component can be retained, and the LED background light source and other structures can be omitted.

[0053] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A built-in dynamic water pressure environment erosion observation and testing device for asphalt materials, characterized in that, The device includes an observation chamber component, a sample holding chamber component, and a background light source chamber component; The observation chamber consists of a stainless steel container B, a transparent quartz dome B, a miniature high-definition camera, an LED light strip, and a power bank. The stainless steel container B and the transparent quartz dome B are tightly connected at the flange B by bolts and screws. The miniature high-definition camera, LED light strip, and power bank are placed inside the observation chamber formed by the stainless steel container B and the transparent quartz dome B, with the miniature high-definition camera facing the center of the transparent quartz dome B. The background light source compartment consists of a stainless steel container A, a transparent quartz round cover A, and an LED background light source. The stainless steel container A and the transparent quartz round cover A are tightly connected at the flange A by bolts and screws. The LED background light source is placed in the middle of the inside of the stainless steel container, facing the transparent quartz round cover A. The transparent quartz round cover A is placed under the transparent quartz round cover B, and the two are fixed by a screw. The screw is covered with a support sleeve. The space formed between the two is completely exposed to the dynamic water pressure environment. The space formed by the transparent quartz round cover A and the transparent quartz round cover B is used to place the sample holding chamber component. The sample holding chamber component consists of an asphalt-coated glass slide and a glass slide fixing clip. The asphalt material is prepared in the form of a coating on the middle position of the asphalt-coated glass slide. The asphalt-coated glass slide is placed at the top center of the transparent quartz round cover A. The glass slide fixing clip is covered on the asphalt-coated glass slide and fixed by a support sleeve. A circular observation hole is provided at the center of the slide fixing clamp, enabling direct observation by a miniature high-definition camera through the transparent quartz round cover B and the circular observation hole of the erosion process of the asphalt-coated glass slide exposed to dynamic water pressure environment.

2. The built-in dynamic water pressure environment erosion asphalt material observation and testing device according to claim 1, characterized in that, O-rings are provided between the stainless steel container A and the transparent quartz round cover A, and between the stainless steel container B and the transparent quartz round cover B.

3. The built-in dynamic water pressure environment erosion asphalt material observation and testing device according to claim 1, characterized in that, The LED light strip is located on the inner side wall of the stainless steel container B and is powered by a power supply connected to a power cord.

4. The built-in dynamic water pressure environment erosion asphalt material observation and testing device according to claim 1, characterized in that, A handle is provided on the top of the outer side of the stainless steel container B.

5. The built-in dynamic water pressure environment erosion asphalt material observation and testing device according to claim 1, characterized in that, The stainless steel container B has a diameter of 50-150mm and a height of 50-150mm; the stainless steel container A has a diameter of 50-150mm and a height not exceeding 50mm; the overall height of the support sleeve does not exceed 100mm.

6. The built-in dynamic water pressure environment erosion asphalt material observation and testing device according to claim 5, characterized in that, The support sleeve is a two-part structure with a hollow inner diameter to ensure that the screw can pass through, and the glass slide fixing clip can be clamped between the upper and lower parts of the sleeve.

7. The built-in dynamic water pressure environment erosion asphalt material observation and testing device according to claim 1, characterized in that, The diameter of the circular observation hole is 10-150 mm; The diameter of the asphalt material sample for the asphalt coating glass slide is 10-100 mm and the thickness is no more than 10 mm.

8. The built-in dynamic water pressure environment erosion asphalt material observation and testing device according to claim 1, characterized in that, The transparent quartz dome A and transparent quartz dome B are completely transparent and do not refract light.

9. The application method of the built-in dynamic water pressure environment erosion asphalt material observation and testing device according to claim 1, characterized in that, The steps include the following: S1. Turn on the LED light strip inside the observation chamber component, the miniature high-definition camera, and the LED background light source inside the background light source chamber component respectively. Assemble the observation chamber component and the background light source chamber component respectively using bolts and screws. At the same time, prepare a glass slide with an asphalt coating film of the required thickness for the test. S2. Place the asphalt-coated glass slide and the glass slide fixing clip in the middle of the top of the transparent quartz round cover A in sequence. Use bolts, screws and support sleeves to assemble the observation chamber component, the sample holding chamber component and the background light source chamber component to form an overall observation test platform. S3. The observation and test platform is moved as a whole to the dynamic water pressure environment of the sealed container of the indoor laboratory instrument by means of the handle. The asphalt coating glass slide is completely exposed to the water environment and continuously subjected to erosion. A miniature high-definition camera is used to observe the changes in the surface morphology of the asphalt material, and the impact data is transmitted to the external analysis device in real time to analyze the characteristics and evolution of the erosion process.

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