Device for testing self-healing capability of polyurethane modified asphalt

Abstract

The utility model relates to the technical field of asphalt ductility testing, in particular to a polyurethane modified asphalt self-healing capacity testing device which comprises a device body, a scraper blade and an asphalt clamp, a constant-temperature water tank is arranged at the top of the device body, a bearing plate is welded in the constant-temperature water tank, and the bearing plate is connected with the scraper blade. Supporting sliding rods are fixed to the two sides of the interior of the constant-temperature water pool correspondingly, sliding blocks are welded to the two sides of a scraper correspondingly, the supporting sliding rods are sleeved with the two sliding blocks correspondingly in a sliding mode, the bottom of the scraper is attached to the top of the bearing plate for use, and a control rod is welded to the top of the scraper; a mounting groove is fixed to one side of the top of the device body, and a threaded rod is mounted in the mounting groove through a bearing. Asphalt falling on the upper portion of the bearing plate can be scraped through sliding of the scraping plate, so that an operator can conveniently process the asphalt attached to the upper portion of the bearing plate, the cleanliness degree of equipment in the using process is guaranteed, and the using efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of asphalt ductility testing technology, specifically to a device for testing the self-healing ability of polyurethane modified asphalt. Background Technology

[0002] During their service life, bridge pavement layers and asphalt pavements are prone to fatigue cracking under the combined effects of repeated traffic loads, sunlight, air, and water. These cracks not only affect driving comfort but also the durability and service life of the bridge. Fatigue cracks in asphalt pavements can shrink or even disappear after a period of inactivity as temperatures rise, demonstrating the self-healing properties of asphalt materials. Adding polyurethane to asphalt can form an elastic network structure, promoting the asphalt's self-healing ability and improving road durability and service life. Furthermore, polyurethane-modified asphalt has higher consistency, strength, low-temperature toughness, and resistance to permanent deformation, thus showing broad application prospects in sustainable pavement development.

[0003] Despite the numerous advantages of polyurethane-modified asphalt, its self-healing ability needs to be tested because the damage and healing mechanisms of asphalt are not yet fully understood. Existing testing methods for polyurethane-modified asphalt suffer from a problem: there is no dedicated testing device for its self-healing ability. Furthermore, during tensile testing, the asphalt may fracture, and fragments fall to the bottom of the ductility meter. Existing devices struggle to effectively clean up this debris, leading to contamination of the instrument's bottom and affecting subsequent use and testing accuracy. Therefore, this proposed device for testing the self-healing ability of polyurethane-modified asphalt is presented. Utility Model Content

[0004] The purpose of this utility model is to provide a testing device for the self-healing ability of polyurethane modified asphalt, in order to solve the problems mentioned in the background art. To achieve the above objective, this utility model provides the following technical solution: A testing device for the self-healing ability of polyurethane modified asphalt, comprising a device body, a scraper, and an asphalt clamp. A constant temperature water tank is provided on the top of the device body. A support plate is welded inside the constant temperature water tank. A support slide rod is fixed on each side of the inside of the constant temperature water tank. A slider is welded on each side of the scraper. The two sliders are slidably sleeved on the outside of the support slide rods. The bottom of the scraper is in contact with the top of the support plate. A control rod is welded to the top of the scraper. An installation groove is fixed on one side of the top of the device body. A threaded rod is installed inside the installation groove through a bearing. A drive assembly is sleeved on the outside of the threaded rod through thread engagement. An asphalt clamp is installed on the top of the support plate. A control host is installed on one side of the device body.

[0005] Preferably, multiple limiting piles are welded at equal intervals on one side of the top of the support plate, and there are two asphalt clamps. A limiting hole block is welded to one side of each of the two asphalt clamps, and the limiting hole block is installed in a limiting position with the limiting pile.

[0006] Preferably, a speed reducer is installed on one side of the mounting groove, and the output end of the speed reducer extends into the mounting groove and is fixedly connected to one end of the threaded rod. Alternatively, a motor is fixedly installed on one side of the speed reducer by bolts, and the output end of the motor extends into the speed reducer and is fixedly connected to the output end of the speed reducer.

[0007] Preferably, a drain pipe is installed on one side of the main body of the device, and the drain pipe is connected to the interior of the constant temperature water tank.

[0008] Preferably, the drive assembly includes a threaded slide plate, and the threaded slide plate and the threaded rod are sleeved together by threaded engagement.

[0009] Preferably, a support rod is welded to one end of the threaded slide plate, and the bottom end of the support rod extends into the interior of the constant temperature water tank. A movable plate is welded to one side of the support rod.

[0010] Preferably, the movable plate has multiple lead screws connected at equal intervals inside by threaded engagement, and a limit baffle is welded to the outer bottom of the movable plate, with a plug rod welded to the bottom of the limit baffle.

[0011] Compared with the prior art, this utility model provides a testing device for the self-healing ability of polyurethane modified asphalt, which has the following beneficial effects:

[0012] When the asphalt breaks during the stretching process, it will fall onto the support plate. The operator can control the scraper to slide along the installation direction of the support slide rod by holding the control lever. Since the bottom of the scraper is in contact with the top of the support plate, the asphalt that has fallen onto the support plate can be scraped off by the sliding of the scraper. This makes it convenient for the operator to deal with the asphalt adhering to the support plate, ensuring the cleanliness of the equipment during use and improving the efficiency of use. Attached Figure Description

[0013] Figure 1 This is a front view structural diagram of the main body of this utility model;

[0014] Figure 2 This is a top view of the structure of this utility model;

[0015] Figure 3 This is a side view of the structure of this utility model;

[0016] Figure 4 This utility model Figure 1 A magnified structural diagram of point A in the middle.

[0017] In the diagram: 1. Main body of the device; 2. Constant temperature water tank; 3. Support plate; 4. Slider; 5. Drain pipe; 6. Scraper; 7. Motor; 8. Reducer; 9. Control rod; 10. Support slide rod; 11. Mounting groove; 12. Drive assembly; 1201. Threaded slide plate; 1202. Movable plate; 1203. Lead screw; 1204. Insert rod; 1205. Limiting baffle; 1206. Support rod; 13. Threaded rod; 14. Control host; 15. Asphalt clamp; 1501. Limiting hole block; 16. Limiting pile. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Example 1: A constant temperature water tank 2 is provided on the top of the main body 1 of the device. A support plate 3 is welded inside the constant temperature water tank 2. A support slide rod 10 is fixed on each side of the inside of the constant temperature water tank 2. A slider 4 is welded on each side of the scraper 6. The two sliders 4 are slidably sleeved on the outside of the support slide rod 10. The bottom of the scraper 6 is in contact with the top of the support plate 3. A control rod 9 is welded to the top of the scraper 6. An installation groove 11 is fixed on one side of the top of the main body 1 of the device. A threaded rod 13 is installed inside the installation groove 11 through a bearing. A drive assembly 12 is sleeved on the outside of the threaded rod 13 through thread engagement. An asphalt clamp 15 is installed on the top of the support plate 3. A control host 14 is installed on one side of the main body 1 of the device.

[0020] Multiple limiting piles 16 are welded at equal intervals on one side of the top of the support plate 3, and there are two asphalt clamps 15. A limiting hole block 1501 is welded to one side of each of the two asphalt clamps 15, and the limiting hole block 1501 is installed with the limiting piles 16 for limiting.

[0021] A speed reducer 8 is installed on one side of the mounting slot 11, and the output end of the speed reducer 8 extends into the mounting slot 11 and is fixedly connected to one end of the threaded rod 13. A motor 7 is fixedly installed on one side of the speed reducer 8 by bolts, and the output end of the motor 7 extends into the speed reducer 8 and is fixedly connected to the output end of the speed reducer 8.

[0022] Specifically, such as Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, during use, asphalt is poured into the interior of two asphalt clamps 15 and then allowed to cool and solidify. After the asphalt has solidified, the limiting hole blocks 1501 fixed at one end of the two asphalt clamps 15 are respectively fixed to the bottom of the limiting pile 16 and the drive assembly 12. Then, by controlling the drive assembly 12 to move along the installation direction of the threaded rod 13, the asphalt clamped between the two asphalt clamps 15 is stretched, thereby observing the ductility of the asphalt. When the asphalt breaks during the stretching process, it will fall above the support plate 3. The operator can control the scraper 6 to slide along the installation direction of the support slide rod 10 by holding the control lever 9. The scraper 6 is attached to the bottom of the support plate 3. Therefore, the asphalt that has fallen on the support plate 3 can be scraped off by the sliding of the scraper 6. This makes it convenient for operators to deal with the asphalt adhering to the support plate 3, ensuring the cleanliness of the equipment during use and improving efficiency. The rotation of the output end of the motor 7 can drive the output end of the reducer 8 to rotate. The rotation of the output end of the reducer 8 can drive the threaded rod 13 to rotate. Since the drive assembly 12 and the threaded rod 13 are connected by threaded engagement, the rotation of the threaded rod 13 can drive the drive assembly 12 to slide along the installation direction of the threaded rod 13.

[0023] Example 2: A drain pipe 5 is installed on one side of the main body 1 of the device, and the drain pipe 5 is connected to the interior of the constant temperature water tank 2. The drive component 12 includes a threaded slide plate 1201, and the threaded slide plate 1201 and the threaded rod 13 are sleeved together by threaded engagement. A support rod 1206 is welded to one end of the threaded slide plate 1201, and the bottom end of the support rod 1206 extends into the interior of the constant temperature water tank 2. A movable plate 1202 is welded to one side of the support rod 1206. Multiple lead screws 1203 are connected at equal intervals inside the movable plate 1202 by threaded engagement. A limit baffle 1205 is welded to the bottom of the movable plate 1202, and an insertion rod 1204 is welded to the bottom of the limit baffle 1205.

[0024] Specifically, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, since a drain pipe 5 is installed on one side of the main body 1 of the device, the water stored in the constant temperature water tank 2 can be discharged through the drain pipe 5. The constant temperature water tank 2 can ensure that the asphalt is not contaminated during the stretching process and improve the accuracy of the test results. By rotating the lead screw 1203, the insertion rod 1204 can be moved downward, so that the insertion rod 1204 is inserted into the limiting hole block 1501 opened on one side of an asphalt clamp 15. The limiting baffle 1205 can prevent the lead screw 1203 from falling out of the movable plate 1202.

[0025] Working principle: During use, ductility specimens of base asphalt and polyurethane-modified asphalt with different admixtures are cut with cracks of different depths using a clean cold scraper. The cutting depths are 5mm and complete fracture, respectively. The completely fractured asphalt specimens are rejoined in a mold. After heating, the two types of asphalt are poured into the interiors of two asphalt clamps 15, and then allowed to cool and solidify. After the asphalt has solidified, the limiting hole blocks 1501 fixed at one end of the two asphalt clamps 15 are fixed to the bottom of the limiting pile 16 and the driving component 12, respectively. During fixing, the limiting hole block 1501 fixed on one side of one asphalt clamp 15 is placed on the outside of the limiting pile 16. By rotating the screw 1203, the insertion rod 1204 can be moved downward, thereby inserting the insertion rod 1204 into the limiting hole block 1501 on one side of one asphalt clamp 15. The rotation of the output end of the motor 7 can drive the... The output end of the reducer 8 rotates, which in turn drives the threaded rod 13 to rotate. Since the drive assembly 12 and the threaded rod 13 are connected by a threaded engagement, the rotation of the threaded rod 13 drives the drive assembly 12 to slide along the installation direction of the threaded rod 13, thereby stretching the asphalt clamped between the two asphalt clamps 15 to observe the ductility of the asphalt and thus determine its healing ability. If the asphalt breaks during the stretching process, it will fall onto the support plate 3. The operator can control the scraper 6 to slide along the installation direction of the support slide rod 10 by holding the control lever 9. Since the bottom of the scraper 6 is in contact with the top of the support plate 3, the sliding of the scraper 6 can scrape off the asphalt that has fallen onto the support plate 3, making it convenient for the operator to treat the asphalt adhering to the support plate 3.

[0026] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A device for testing the self-healing ability of polyurethane modified asphalt, comprising a main body (1), a scraper (6), and an asphalt clamp (15), characterized in that: The top of the main body (1) of the device is provided with a constant temperature water tank (2). A support plate (3) is welded inside the constant temperature water tank (2). A support slide rod (10) is fixed on each side inside the constant temperature water tank (2). A slider (4) is welded on each side of the scraper (6). The two sliders (4) are slidably sleeved on the outside of the support slide rod (10). The bottom of the scraper (6) is in contact with the top of the support plate (3). A control rod (9) is welded to the top of the scraper (6). An installation groove (11) is fixed on one side of the top of the main body (1). A threaded rod (13) is installed inside the installation groove (11) through a bearing. A drive assembly (12) is sleeved on the outside of the threaded rod (13) through thread engagement. An asphalt clamp (15) is installed on the top of the support plate (3). A control host (14) is installed on one side of the main body (1).

2. The self-healing ability testing device for polyurethane modified asphalt according to claim 1, characterized in that: Multiple limiting piles (16) are welded at equal intervals on one side of the top of the support plate (3), and there are two asphalt clamps (15). A limiting hole block (1501) is welded to one side of each of the two asphalt clamps (15), and the limiting hole block (1501) is installed with the limiting pile (16) for limiting.

3. The self-healing ability testing device for polyurethane modified asphalt according to claim 1, characterized in that: A speed reducer (8) is installed on one side of the mounting groove (11), and the output end of the speed reducer (8) extends into the mounting groove (11) and is fixedly connected to one end of the threaded rod (13). A motor (7) is fixedly installed on one side of the speed reducer (8) by bolts, and the output end of the motor (7) extends into the speed reducer (8) and is fixedly connected to the output end of the speed reducer (8).

4. The self-healing ability testing device for polyurethane modified asphalt according to claim 1, characterized in that: A drain pipe (5) is installed on one side of the main body (1) of the device, and the drain pipe (5) is connected to the interior of the constant temperature water tank (2).

5. The self-healing ability testing device for polyurethane modified asphalt according to claim 1, characterized in that: The drive assembly (12) includes a threaded slide plate (1201), and the threaded slide plate (1201) and the threaded rod (13) are engaged by threads.

6. The polyurethane-modified asphalt self-healing ability testing device according to claim 5, characterized in that: One end of the threaded slide plate (1201) is welded with a support rod (1206), and the bottom end of the support rod (1206) extends into the interior of the constant temperature water tank (2). A movable plate (1202) is welded to one side of the support rod (1206).

7. The polyurethane-modified asphalt self-healing ability testing device according to claim 6, characterized in that: The movable plate (1202) has multiple lead screws (1203) connected at equal intervals inside by threaded engagement, and a limit baffle (1205) is welded to the bottom of the movable plate (1202), with a plug rod (1204) welded to the bottom of the limit baffle (1205).

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