Device for detecting self-repairing performance of modified asphalt

Abstract

The utility model relates to the technical field of road engineering, and discloses a modified asphalt self-repairing performance detection device which comprises a base, a water tank is fixedly connected to the middle of the base, a sealing cover is slidably connected to the top of the water tank, a water control assembly is arranged on the left side of the top of the sealing cover, and a display screen is fixedly connected to the top of the base. The water tank is fixedly connected with an air pump, one end of the air pump communicates with an air inlet pipe, the other end of the air inlet pipe communicates with the right side of the top of the sealing cover, the outer wall of the air inlet pipe is fixedly connected with an air valve, a pressure measuring assembly is arranged on the inner side of the water tank, and the bottom of the water tank communicates with a water outlet. According to the utility model, the self-healing performance of the dense-graded asphalt mixture is evaluated by measuring the ratio of the water seepage rates before and after the healing of the same test piece, a more comprehensive and accurate evaluation method is provided, the interior of the water tank is pressurized through the air pump, and the asphalt sample can be subjected to seam making operation after the test.

Description

Technical Field

[0001] The utility model relates to the technical field of road engineering, in particular to a self-repairing performance detection device for modified asphalt. Background Art

[0002] Modified asphalt is an asphalt mixture made by adding rubber, resin, high molecular polymer, ground rubber powder or other fillers as admixtures, or taking measures to slightly oxidize the asphalt to improve the performance of asphalt or asphalt mixture. There are two mechanisms for modifying asphalt: one is to change the chemical composition of asphalt, and the other is to make the modifier evenly distributed in the asphalt to form a certain spatial network structure.

[0003] Asphalt self-healing is the process of self-repairing of pavement damage such as fatigue and aging. The environment in which the asphalt is located will affect the self-healing effect of the asphalt. Currently, there are studies on improving the self-healing ability of modified asphalt from the perspective of changing the asphalt's sensitivity to temperature and repair time, so as to extend the service life of the pavement.

[0004] However, in the process of repairing modified asphalt with high temperature sensitivity, the environmental conditions required for self-repair of the modified asphalt cannot be accurately provided, resulting in inaccurate and unreliable test results of the self-repairing performance of the modified asphalt. Therefore, a self-repairing performance detection device for modified asphalt is proposed to solve the above problems. Utility Model Content

[0005] In order to make up for the above shortcomings, the utility model provides a self-repairing performance detection device for modified asphalt, which aims to improve the problem in the existing technology that the environmental conditions required for self-repair of modified asphalt cannot be accurately provided during the repair process of modified asphalt with high temperature sensitivity.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a self-repairing performance detection device for modified asphalt, comprising a base, a water tank fixedly connected to the middle part of the base, a sealing cover slidably connected to the top of the water tank, a water control assembly is provided on the top left side of the sealing cover, a display screen is fixedly connected to the top of the base, an air pump is fixedly connected, one end of the air pump is connected to an air inlet pipe, the other end of the air inlet pipe is connected to the top right side of the sealing cover, an air valve is fixedly connected to the outer wall of the air inlet pipe, a pressure measuring assembly is provided on the inner side of the water tank, the bottom of the water tank is connected to a water outlet, a water collecting funnel is slidably connected to the bottom of the water tank, an opening and closing assembly is provided on the top of the water collecting funnel, an observation window is provided on the outer wall of the water tank, a scale line is fixedly connected to the outer wall of the water tank, and a seam-making mechanism is provided on the right side of the scale line and the inner side of the water tank.

[0007] Through the above technical solution: through the water control component and the pressure measuring component, the water intake and pressure value in the experiment can be accurately measured and controlled to ensure the accuracy and stability of the experimental conditions, thereby improving the reliability of the test results. Equipped with a display screen, temperature display, observation window and scale line, it can monitor and intuitively display the key data of the experimental process in real time, making it convenient for operators to observe and record in time.

[0008] As a further description of the above technical solution:

[0009] The seaming mechanism includes a heating wire, the outer wall of the heating wire is fixedly connected to the inner wall of the water tank, the top of the sealing cover is fixedly connected to a connecting rod, the bottom end of the connecting rod is fixedly connected to a temperature measuring device, the outer wall of the temperature measuring device is arranged on the inner side of the water tank, the top of the connecting rod is fixedly connected to a temperature display, and the rear side of the water tank is fixedly connected to a controller.

[0010] Through the above technical solution: through the combination of heating wire, temperature measuring device and controller, the seam making temperature can be accurately controlled to produce stable micro cracks.

[0011] As a further description of the above technical solution:

[0012] The water control component includes a water injection pipe, one end of which is connected to the top left side of the sealing cover, a water valve is fixedly connected to the outer wall of the water injection pipe, a flow meter is provided on the outer wall of the water injection pipe, and the display screen and the flow meter are electrically connected.

[0013] Through the above technical solution: the setting of the water valve can conveniently control the start and stop of water injection, ensuring that the amount of water injected into the water tank is accurate and controllable, the flow meter can measure the flow rate of water injection in real time, and through electrical connection with the display screen, the flow data can be intuitively displayed, which is convenient for operators to accurately record and monitor the water injection volume.

[0014] As a further description of the above technical solution:

[0015] The pressure measuring assembly includes an air pressure sensor. The top of the air pressure sensor is connected to a connecting port, and the outer wall of the connecting port is arranged on the top of the sealing cover.

[0016] Through the above technical solution: the air pressure sensor can detect the air pressure in the water tank in real time, allowing the operator to understand the internal pressure conditions at any time.

[0017] As a further description of the above technical solution:

[0018] The opening and closing assembly includes two bottom plates, the inner side of the upper bottom plate is fixedly connected to the outer wall of the water tank, and the inner side of the lower bottom plate is fixedly connected to the outer wall of the water collecting funnel. The two bottom plates are connected by fixing screws.

[0019] Through the above technical solution: through the connection method of two base plates and fixed screws, a stable and reliable connection can be provided to ensure that the relative position between the water collecting funnel and the water tank is fixed. The fixed screw is used for connection. When the water collecting funnel needs to be opened or closed, only the screw needs to be turned. The operation is relatively simple and convenient.

[0020] As a further description of the above technical solution:

[0021] The outer wall of the fixing screw is threadedly connected with a gasket, and the top of the gasket is slidably connected to the bottom of the bottom plate at the lower end.

[0022] Through the above technical solution: the gasket reduces the wear caused by the direct contact between the fixing screw and the lower end base plate to a certain extent, and extends the service life of the component.

[0023] As a further description of the above technical solution:

[0024] The inner side of the water outlet is fixedly connected with a rubber gasket, and the bottom of the rubber gasket is slidably connected to the inner side of the water collecting funnel.

[0025] Through the above technical solution: the rubber gasket can effectively fill the gap between the water outlet and the water collecting funnel, prevent water from leaking at the connection, and ensure the accurate collection of water flow during the experiment.

[0026] As a further description of the above technical solution:

[0027] The bottom of the display screen is fixedly connected to a first fixing frame, and the bottom of the air pump is fixedly connected to a second fixing frame.

[0028] Through the above technical solution: the first fixing frame provides a stable support for the display screen, and the second fixing frame provides a reliable support for the air pump, which can effectively prevent the display screen and the air pump from shaking or shifting during operation, ensuring their normal operation.

[0029] The utility model has the following beneficial effects:

[0030] 1. In the utility model, the flow meter, air pressure sensor and display screen are connected to realize the accurate measurement and recording of flow value and pressure, providing an accurate data basis for evaluation. By measuring the water seepage rate ratio of the same specimen before and after healing, the self-healing performance of dense-graded asphalt mixture is evaluated, providing a more comprehensive and accurate evaluation method.

[0031] 2. In the present invention, an air pump is used to pressurize the water tank, so that the asphalt sample can be cracked to produce micro cracks that can be self-repaired, so as not to crush the tested sample and save resources. At the same time, the temperature of the heating wire is accurately adjusted by the temperature meter and controller to achieve precise control of the temperature of the asphalt sample to produce stable micro cracks. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a front perspective schematic diagram of a self-repairing performance detection device for modified asphalt proposed in the present invention;

[0033] Figure 2 This is a front view of a self-repairing performance testing device for modified asphalt proposed in the present invention;

[0034] Figure 3 This is a disassembled diagram of a self-repairing performance detection device for modified asphalt proposed in the utility model;

[0035] Figure 4 This is a front perspective schematic diagram of a self-repairing performance detection device for modified asphalt proposed in the present invention;

[0036] Figure 5 This is a structural schematic diagram of a seam-making mechanism of a self-repairing performance detection device for modified asphalt proposed in the utility model.

[0037] Legend:

[0038] 1. Base; 2. Sewing mechanism; 201. Temperature measuring device; 202. Connecting rod; 203. Temperature display; 204. Heating wire; 205. Controller; 3. Water tank; 4. Sealing cover; 5. Water filling pipe; 6. Water valve; 7. Flow meter; 8. Display screen; 9. Air pump; 10. Air inlet pipe; 11. Air valve; 12. Observation window; 13. Scale line; 14. Water outlet; 15. Rubber gasket; 16. Water collecting funnel; 17. Bottom plate; 18. Fixing screw; 19. Gasket; 20. Air pressure sensor; 21. Connecting port; 22. Fixing bracket 1; 23. Fixing bracket 2. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0040] Refer to the attached Figure 1 , Attachment Figure 2 and attached Figure 3The utility model provides an embodiment of a self-repairing performance detection device for modified asphalt, comprising a base 1, a water tank 3 fixedly connected to the middle of the base 1, a sealing cover 4 slidably connected to the top of the water tank 3, a water control component is provided on the left side of the top of the sealing cover 4, a display screen 8 is fixedly connected to the top of the base 1, an air pump 9 is fixedly connected, one end of the air pump 9 is connected to an air inlet pipe 10, the other end of the air inlet pipe 10 is connected to the right side of the top of the sealing cover 4, an air valve 11 is fixedly connected to the outer wall of the air inlet pipe 10, a pressure measuring component is provided on the inner side of the water tank 3, a water outlet 14 is connected to the bottom of the water tank 3, a water collecting funnel 16 is slidably connected to the bottom of the water tank 3, an opening and closing component is provided on the top of the water collecting funnel 16, an observation window 12 is provided on the outer wall of the water tank 3, and the outer wall of the water tank 3 The wall is fixedly connected with a scale line 13, and the scale line 13 is arranged on the right side of the observation window 12. A seam-making mechanism 2 is arranged on the inner side of the water tank 3; the water control component includes a water injection pipe 5, one end of the water injection pipe 5 is connected to the top left side of the sealing cover 4, the outer wall of the water injection pipe 5 is fixedly connected with a water valve 6, the outer wall of the water injection pipe 5 is provided with a flow meter 7, and the display screen 8 is electrically connected to the flow meter 7; the pressure measuring component includes an air pressure sensor 20, the top of the air pressure sensor 20 is connected with a connecting port 21, and the outer wall of the connecting port 21 is arranged on the top of the sealing cover 4; the opening and closing component includes two bottom plates 17, the inner side of the upper bottom plate 17 is fixedly connected to the outer wall of the water tank 3, and the inner side of the lower bottom plate 17 is fixedly connected to the outer wall of the water collecting funnel 16, and the two bottom plates 17 are connected by a fixing screw 18;

[0041] Specifically, water will penetrate downward through the cracks in the mixture, so the water seepage rate reflects the size of the cracks. The self-healing property of the modified asphalt will change the size of the cracks, thereby affecting the water seepage rate. By connecting the flow meter 7 and the display screen 8, the flow value Q1 during the test is recorded. By connecting the air pressure sensor 20 and the display screen 8, the pressure delivered to the water tank 3 can be controlled. The Q2 value can be read through the observation window 12 and the scale line 13 set on the water tank 3. The water seepage rate ratio of the same specimen before and after healing is measured by the device to evaluate the self-healing performance of the asphalt mixture. The water seepage rate before healing is v1=(Q1-Q2) / t(1), and the water seepage rate after healing is v2=(Q1-Q2) / t. The water seepage rate ratio ve=v1 / v2 is calculated to evaluate the self-healing performance of the dense-graded asphalt mixture. The larger ve is, the better the self-healing property of the dense-graded asphalt mixture is. The operation steps are clear and the device structure is relatively simple, easy to operate and maintain, which improves the feasibility and efficiency in practical applications.

[0042] Refer to the attached Figure 4 and attached Figure 5The sewing mechanism 2 includes a heating wire 204, the outer wall of the heating wire 204 is fixedly connected to the inner wall of the water tank 3, the top of the sealing cover 4 is fixedly connected to a connecting rod 202, the bottom end of the connecting rod 202 is fixedly connected to a temperature measuring device 201, the outer wall of the temperature measuring device 201 is arranged on the inner side of the water tank 3, the top of the connecting rod 202 is fixedly connected to a temperature display 203, and the rear side of the water tank 3 is fixedly connected to a controller 205;

[0043] Specifically, relatively stable microcracks can be produced when the seaming temperature is below 5°C. The asphalt sample can be controlled within a better temperature range through the heating wire 204, the temperature measuring device 201, the temperature display 203 and the controller 205. After the self-healing performance of the asphalt sample is measured in the water tank 3, the seaming operation can be performed on the asphalt sample to produce microcracks that can achieve self-repairing, so as not to crush the sample, thereby realizing the reuse of resources and saving resources.

[0044] Refer to the attached Figure 3 , the inner side of the water outlet 14 is fixedly connected with a rubber gasket 15, and the bottom of the rubber gasket 15 is slidably connected to the inner side of the water collecting funnel 16; the bottom of the display screen 8 is fixedly connected with a fixing frame 1 22, and the bottom of the air pump 9 is fixedly connected with a fixing frame 2 23; the outer wall of the fixing screw 18 is threadedly connected with a gasket 19, and the top of the gasket 19 is slidably connected to the bottom of the lower end base plate 17;

[0045] Specifically, the rubber gasket 15 can be well connected to the water collecting funnel 16 and the water tank 3 to ensure its sealing. The display screen 8 is supported by the fixing frame 1 22, and the air pump 9 is fixed by the fixing frame 2 23 to ensure its stable installation. The outer wall of the fixing screw 18 is connected to the gasket 19 by threaded fastening. The gasket 19 is flexibly connected to the bottom of the lower base plate 17, which ensures the stability of the equipment and improves its service life.

[0046] Working principle: The first step of using this device is to put the test piece into the water tank 3 and cover it with the sealing cover 4. The second step is to inject enough water into the water tank 3 through the water filling pipe 5, close the water valve 6 to seal the water tank 3, and record the flow value Q1 through the display 8. The third step is to connect the air pump 9 on the top of the base 1, open the air valve 11 to inflate the water tank 3, and when the value on the display 8 reaches 0.7MPa, close the air inlet valve 11. The fourth step is to twist the fixing screw 18 at the bottom of the water tank 3, and the water in the water tank 3 flows from the water outlet 14 to the water collecting funnel 16. At this time, the water seepage test begins. Synchronously start a stopwatch to record the test time t. After the specified time t, the water seepage test ends. Observe the reading Q2 of the scale line 13 in the water tank 3 through the observation window 12. After obtaining the required Q1, Q2 and t values, calculate the water seepage rate v1 value according to the specified formula. In the fifth step, add the healed specimen back into the water tank 3 and repeat the above four steps again to calculate the value of v2. Finally, use the water seepage rate ratio ve of the same specimen before and after healing to evaluate the self-healing performance of the dense-graded asphalt mixture. The larger ve is, the better the self-healing performance of the dense-graded asphalt mixture is.

[0047] When the seaming temperature is below 5°C, relatively stable microcracks can be produced. The temperature of the current asphalt sample is observed by the temperature measuring device 201 set inside the water tank 3. When the temperature is low and does not reach the ideal temperature, the controller 205 can be used to adjust the heat of the heating wire 204 to heat the asphalt sample inside the water tank 3.

[0048] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A device for detecting the self-repairing performance of modified asphalt, comprising a base (1), characterized in that: The middle of the base (1) is fixedly connected to a water tank (3), the top of the water tank (3) is slidably connected to a sealing cover (4), a water control component is provided on the left side of the top of the sealing cover (4), the top of the base (1) is fixedly connected to a display screen (8), and an air pump (9), one end of the air pump (9) is connected to an air intake pipe (10), the other end of the air intake pipe (10) is connected to the right side of the top of the sealing cover (4), and the outer wall of the air intake pipe (10) is fixedly connected to an air valve (11). A pressure measuring assembly is provided on the inner side of the water tank (3), a water outlet (14) is connected to the bottom of the water tank (3), a water collecting funnel (16) is slidably connected to the bottom of the water tank (3), an opening and closing assembly is provided on the top of the water collecting funnel (16), an observation window (12) is provided on the outer wall of the water tank (3), a scale line (13) is fixedly connected to the outer wall of the water tank (3), and the scale line (13) is provided on the right side of the observation window (12), and a seam-making mechanism (2) is provided on the inner side of the water tank (3).

2. The self-repairing performance detection device for modified asphalt according to claim 1, characterized in that: The sewing mechanism (2) comprises a heating wire (204), the outer wall of the heating wire (204) is fixedly connected to the inner wall of the water tank (3), the top of the sealing cover (4) is fixedly connected to a connecting rod (202), the bottom end of the connecting rod (202) is fixedly connected to a temperature measuring device (201), the outer wall of the temperature measuring device (201) is arranged on the inner side of the water tank (3), the top of the connecting rod (202) is fixedly connected to a temperature display (203), and the rear side of the water tank (3) is fixedly connected to a controller (205).

3. The self-repairing performance detection device for modified asphalt according to claim 1, characterized in that: The water control assembly comprises a water injection pipe (5), one end of the water injection pipe (5) is connected to the left side of the top of the sealing cover (4), a water valve (6) is fixedly connected to the outer wall of the water injection pipe (5), a flow meter (7) is provided on the outer wall of the water injection pipe (5), and the display screen (8) and the flow meter (7) are electrically connected.

4. The self-repairing performance detection device for modified asphalt according to claim 1, characterized in that: The pressure measuring assembly comprises an air pressure sensor (20), the top of the air pressure sensor (20) is connected to a connecting port (21), and the outer wall of the connecting port (21) is arranged on the top of the sealing cover (4).

5. The self-repairing performance detection device for modified asphalt according to claim 1, characterized in that: The opening and closing assembly comprises two bottom plates (17), the inner side of the upper bottom plate (17) being fixedly connected to the outer wall of the water tank (3), and the inner side of the lower bottom plate (17) being fixedly connected to the outer wall of the water collecting funnel (16), and the two bottom plates (17) being connected via a fixing screw (18).

6. The self-repairing performance detection device for modified asphalt according to claim 5, characterized in that: The outer wall of the fixing screw (18) is threadedly connected with a gasket (19), and the top of the gasket (19) is slidably connected to the bottom of the bottom plate (17) at the lower end.

7. The self-repairing performance detection device for modified asphalt according to claim 1, characterized in that: A rubber gasket (15) is fixedly connected to the inner side of the water outlet (14), and the bottom of the rubber gasket (15) is slidably connected to the inner side of the water collecting funnel (16).

8. The self-repairing performance detection device for modified asphalt according to claim 1, characterized in that: The bottom of the display screen (8) is fixedly connected to a first fixing frame (22), and the bottom of the air pump (9) is fixedly connected to a second fixing frame (23).

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