Asphalt mixture rutting experimental device and experimental method

Abstract

The invention discloses an asphalt mixture rutting experimental device and experimental method.The asphalt mixture rutting experimental device comprises a base, a lifting supporting frame is fixedly connected to the base, and a pair of mounting plates is fixedly connected to the lower end of an upper end wall plate of the lifting supporting frame; a swing arm is rotatably connected between the pair of mounting plates, the lower end of the swing arm is fixedly connected with an arc-shaped rolling plate, the base is fixedly connected with a pair of supporting blocks, and the pair of supporting blocks is arranged between the two side walls of a lifting supporting frame. The positive and negative threads are arranged on the rotating rod, the pair of clamping plates is mounted on the positive and negative threads, and the clamping plates are driven to move through rotation of the rotating rod, so that a sample mold is clamped and fixed through the clamping plates, and the sample mold is convenient to fix; and meanwhile, when the asphalt mixture in the sample mold needs to be rotated in the compaction process, the sample mold is convenient to disassemble and assemble through the rotating rod, so that the sample mold is convenient to rotate.

Description

Technical Field

[0001] This invention belongs to the technical field of rutting test devices, specifically relating to a rutting test device and test method for asphalt mixtures. Background Technology

[0002] Asphalt, as one of the main materials for road paving, requires compaction during the paving process. To test the performance of the compacted asphalt, an asphalt mixture rutting sample forming machine is needed to simulate the asphalt compaction process, and the compacted asphalt is used as a sample for performance testing. The rutting test of asphalt mixtures is an important part of highway asphalt mixture testing. It is used to determine the high-temperature rutting resistance of asphalt mixtures, providing asphalt mixture manufacturers with high-temperature stability testing during mix design to control the quality of asphalt mixture production. It can also be used for on-site high-temperature stability testing of asphalt mixtures.

[0003] When using the asphalt rutting test apparatus, the mold needs to be fixed when compacting the asphalt mixture inside the mold. However, the existing test apparatus is not convenient for fixing the mold during use. Furthermore, after compacting the mixture inside the mold, the mold needs to be rotated to repeatedly compact the asphalt mixture inside the mold to ensure a tight compaction effect, making the test apparatus inconvenient to operate.

[0004] Therefore, in order to address the above-mentioned technical problems, it is necessary to provide an experimental apparatus and method for testing rutting of asphalt mixtures. Summary of the Invention

[0005] The purpose of this invention is to provide an apparatus and method for testing rutting in asphalt mixtures, in order to solve the above-mentioned problems.

[0006] To achieve the above objectives, an embodiment of the present invention provides the following technical solution:

[0007] An asphalt mixture rutting test apparatus includes a base, on which a liftable support frame is fixedly connected. A pair of mounting plates are fixedly connected to the lower end of the upper wall of the liftable support frame. A swing arm is rotatably connected between the pair of mounting plates. An arc-shaped compaction plate is fixedly connected to the lower end of the swing arm. A pair of support blocks are fixedly connected to the base and positioned between the two side walls of the liftable support frame. A slide rail is provided within each support block, and a slider is slidably connected within the slide rail. A support plate is fixedly connected to each slider. A pair of support blocks are fixedly connected to the front and rear ends of each support plate. A pair of rotating rods are rotatably connected between the pair of support blocks and positioned on the left and right sides of each support block. Each rotating rod has a positive thread and a negative thread. A first clamping plate is threaded onto the positive thread, and a second clamping plate is threaded onto the negative thread.

[0008] As a further improvement of the present invention, a pair of rotating shafts are fixedly connected to the left and right side walls of the swing arm, and the pair of rotating shafts are rotatably connected to the pair of mounting plates.

[0009] As a further improvement of the present invention, a hydraulic cylinder is installed on the liftable support frame, and a drive rod is provided at the lower end of the hydraulic cylinder, and the lower end of the drive rod is installed on the swing arm.

[0010] As a further improvement of the present invention, a pair of bearings are installed on each pair of support blocks, and the two ends of the rotating rod are respectively installed in the bearings installed on the pair of support blocks.

[0011] As a further improvement of the present invention, one end of the rotating rod located on the front side passes through the bearing located on the front side and is placed at the front end, and a rotating block is fixedly connected to the end of the rotating rod located at the front end of the bearing.

[0012] As a further improvement of the present invention, a sample mold is provided on the support plate, and the first clamping plate and the second clamping plate are respectively located on the front and rear sides of the sample mold.

[0013] As a further improvement of the present invention, a control console is installed on the liftable support frame, and the front side wall of the control console is inclined.

[0014] As a further improvement of the present invention, a display screen is provided on the front side wall of the console, and multiple operation buttons are installed on the front side wall of the console.

[0015] A test method for an asphalt mixture rutting test apparatus, the test method comprising:

[0016] S1. By rotating the rotating block, the rotating rod is driven to rotate. When the rotating rod rotates, it can drive the first clamping plate and the second clamping plate to move away from each other, so that the first clamping plate and the second clamping plate will not clamp the sample mold, thereby removing the sample mold from the support plate.

[0017] S2. Pour the asphalt mixture that needs to be compacted into the sample mold, so that the asphalt mixture in the sample mold is kept as flat as possible.

[0018] S3. Place the sample mold back on the support plate so that the first clamping plate and the second clamping plate are on the front and rear sides of the sample mold. Then, by rotating the rotating block, the rotating rod is driven to rotate. The rotation of the rotating rod drives the first clamping plate and the second clamping plate to move closer to each other, so that the first clamping plate and the second clamping plate clamp the sample mold and ensure the stability of the sample mold.

[0019] S4. The lowering of the liftable support frame brings the arc-shaped compaction plate into contact with the asphalt mixture on the sample mold, applying a downward pressure force to the asphalt mixture. Then, the hydraulic cylinder is activated, causing the hydraulic cylinder to drive the drive rod to move. This, in turn, causes the swing arm to rotate, making the arc-shaped compaction plate rotate along with the swing arm. As the arc-shaped compaction plate rotates, it moves the sample mold, causing the support plate to slide on the support block, thereby compacting the asphalt mixture inside the sample mold.

[0020] S5. After compacting the asphalt mixture in the sample mold with the arc-shaped roller for a certain period of time, close the arc-shaped roller, remove the sample mold from the support plate by rotating the rotating block, rotate the sample mold, put it back on the support plate, fix it, and then perform the compaction operation again. Repeat this process.

[0021] As a further improvement of the present invention, the time for the arc-shaped compaction plate to compact the asphalt mixture in the sample mold is 1 to 3 minutes, and the number of times the sample mold is compacted is 6 to 10.

[0022] Compared with the prior art, the present invention has the following advantages:

[0023] This invention features a rotating rod with both positive and negative threads, on which a pair of clamping plates are installed. The rotation of the rotating rod causes the clamping plates to move, thereby clamping and fixing the sample mold. This makes it easy to fix the sample mold. At the same time, when the asphalt mixture inside the sample mold needs to be rotated during compaction, the rotating rod makes it easy to disassemble and assemble the sample mold, thus facilitating the rotation of the sample mold. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a front view of an asphalt mixture rutting test apparatus according to an embodiment of the present invention;

[0026] Figure 2 This is a three-dimensional representation of an asphalt mixture rutting test apparatus according to an embodiment of the present invention. Figure 1 ;

[0027] Figure 3 This is a three-dimensional representation of an asphalt mixture rutting test apparatus according to an embodiment of the present invention. Figure 2 ;

[0028] Figure 4 This is a schematic diagram of the rotating rod installation in one embodiment of the present invention;

[0029] Figure 5 This is a cross-sectional view of an asphalt mixture rutting test apparatus according to an embodiment of the present invention.

[0030] In the diagram: 1. Base, 2. Liftable support frame, 3. Mounting plate, 4. Rotating shaft, 5. Swing arm, 6. Arc-shaped rolling plate, 7. Hydraulic cylinder, 8. Drive rod, 9. Support block, 10. Slide rail, 11. Slider, 12. Support plate, 13. Support block, 14. Bearing, 15. Rotating rod, 16. Positive thread, 17. Negative thread, 18. First clamping plate, 19. Second clamping plate, 20. Rotating block, 21. Sample mold, 22. Control console, 23. Display screen, 24. Operation button. Detailed Implementation

[0031] The present invention will now be described in detail with reference to the embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional modifications made by those skilled in the art based on these embodiments are included within the scope of protection of the present invention.

[0032] An asphalt mixture rutting test device disclosed in an embodiment of the present invention. The rutting test of asphalt mixture is an important part of highway asphalt mixture tests. On the one hand, it is used to measure the high-temperature rutting resistance of asphalt mixture, which is used for the high-temperature stability inspection during the proportioning design by asphalt mixture manufacturers to control the quality of asphalt mixture production; on the other hand, it can also be used for the high-temperature stability inspection of on-site asphalt mixture. In order to improve the convenience of the operation room during the asphalt mixture rutting test, an asphalt mixture rutting test device is provided.

[0033] As shown Figures 1-5 in Figures 5 and 6, it includes a base 1, and a liftable support frame 2 is fixedly connected to the base 1. The base 1 is a support component of the test device and is used for the installation of test device components. The liftable support frame 2 is installed on the base 1, and the base 1 supports the liftable support frame 2.

[0034] As shown Figure 1 in Figure 5 Figures 8 and 9, a pair of mounting plates 3 are fixedly connected to the lower end of the upper end wall plate of the liftable support frame 2. A swing arm 5 is rotatably connected between the pair of mounting plates 3, and an arc-shaped rolling plate 6 is fixedly connected to the lower end of the swing arm 5. The swing arm 5 is rotatably connected between the pair of mounting plates 3, so that the swing arm 5 can rotate between the pair of mounting plates 3. Since the arc-shaped rolling plate 6 is fixedly connected to the lower end of the swing arm 5, the arc-shaped rolling plate 6 can be driven to rotate when the swing arm 5 rotates.

[0035] As shown Figure 1 in Figure 5 Figures 11 and 12, a pair of rotating shafts 4 are fixedly connected to the left and right side walls of the swing arm 5, and the pair of rotating shafts 4 are rotatably connected to the pair of mounting plates 3. By fixedly connecting a pair of rotating shafts 4 to the left and right side walls of the swing arm 5 and rotatably connecting the rotating shafts 4 to the mounting plates 3, the rotating shafts 4 can rotate on the mounting plates 3, and thus the swing arm 5 can rotate.

[0036] As shown Figure 2 in Figure 3 Figures 14 and 15, a hydraulic cylinder 7 is installed on the liftable support frame 2. A driving rod 8 is provided at the lower end of the hydraulic cylinder 7, and the lower end of the driving rod 8 is installed on the swing arm 5. By installing a hydraulic cylinder 7 on the liftable support frame 2 and providing a driving rod 8 at the lower end of the hydraulic cylinder 7, the hydraulic cylinder 7 drives the driving rod 8 to move, so that the swing arm 5 is driven to swing through the driving rod 8, and further the arc-shaped rolling plate 6 swings, and the asphalt mixture can be compacted by the swing of the arc-shaped rolling plate 6.

[0037] As shown Figure 2 in Figure 3 Figures 17, Figure 5As shown, a pair of support blocks 9 are fixedly connected to the base 1. The pair of support blocks 9 are arranged between the two side walls of the liftable support frame 2. A slide rail 10 is provided in the support block 9, and a slider 11 is slidably connected in the slide rail 10. A support plate 12 is fixedly connected to the slider 11. By providing the slide rail 10 in the support block 9 and slidingly connecting the slider 11 in the slide rail 10, the slider 11 can slide in the slide rail 10. At the same time, since the support plate 12 is fixedly connected to the slider 11, when the slider 11 slides, it can drive the support plate 12 to move, so that the support plate 12 can move on the slide rail 10. Since there are a pair of support blocks 9, there are a pair of sliders 11, and the support plate 12 can be supported by the pair of sliders 11, making the support plate 12 stable when moving.

[0038] See Figure 3 and Figure 4 As shown, a pair of support blocks 13 are fixedly connected to the front and rear ends of the support plate 12. A pair of rotating rods 15 are rotatably connected between the pair of support blocks 13. The pair of rotating rods 15 are arranged on the left and right sides of the support block 13. A right-handed thread 16 and a left-handed thread 17 are provided on the rotating rod 15. A first clamping plate 18 is threadedly connected to the right-handed thread 16, and a second clamping plate 19 is threadedly connected to the left-handed thread 17. Since the two ends of the rotating rod 15 are rotatably connected to the pair of support blocks 13, the rotating rod 15 can rotate on the pair of support blocks 13. Since the rotating rod 15 is provided with a right-handed thread 16 and a left-handed thread 17, and the first clamping plate 18 is threadedly connected to the right-handed thread 16 and the second clamping plate 19 is threadedly connected to the left-handed thread 17, when the rotating rod 15 rotates, the first clamping plate 18 and the second clamping plate 19 can move closer to or away from each other on the rotating rod 15.

[0039] See Figures 2-4 As shown, a pair of bearings 14 are installed on each of the pair of support blocks 13, and the two ends of the rotating rod 15 are respectively installed in the bearings 14 installed on the pair of support blocks 13. By installing the bearings 14 on the support blocks 13 and respectively installing the two ends of the rotating rod 15 in the bearings 14, the rotating rod 15 can rotate on the pair of support blocks 13 through the bearings 14.

[0040] See Figures 2-4 As shown, the front end of the rotating rod 15 located on the front side passes through the bearing 14 located on the front side and is placed at the front end. The end of the rotating rod 15 placed at the front end of the bearing 14 is fixedly connected to a rotating block 20. Since it is necessary to drive the first clamping plate 18 and the second clamping plate 19 to move by the rotation of the rotating rod 15 during use, in order to facilitate the rotation of the rotating rod 15, a rotating block 20 is fixedly connected to one end of the rotating rod 15, and the rotating rod 15 is driven to rotate through the rotating block 20, making the rotation of the rotating rod 15 convenient.

[0041] See Figure 2And Figure 5 As shown in Figure 5 , a specimen mold 21 is provided on the support plate 12, and the first clamping plate 18 and the second clamping plate 19 are respectively located on the front and rear sides of the specimen mold 21. The specimen mold 21 is used to place the asphalt mixture, and then the asphalt mixture in the specimen mold 21 is compacted by the arc-shaped rolling plate 6. Therefore, when compacting, it is necessary to ensure the stability of the specimen mold 21. Therefore, the first clamping plate 18 and the second clamping plate 19 are respectively arranged on the front and rear sides of the specimen mold 21, so as to fix the specimen mold 21 through the first clamping plate 18 and the second clamping plate 19.

[0042] Preferably, by rotating the rotating rod 15, the first clamping plate 18 and the second clamping plate 19 are moved, making it convenient for the first clamping plate 18 and the second clamping plate 19 to move, so that it is convenient for the first clamping plate 18 and the second clamping plate 19 to fix the specimen mold 21, and further making it convenient for the fixing, disassembly and assembly of the specimen mold 21.

[0043] Refer to Figures 1-3 As shown in Figures 1-3 , a console 22 is installed on the liftable support frame 2. The front side wall of the console 22 is inclined. A display screen 23 is provided on the front side wall of the console 22, and a plurality of operation buttons 24 are installed on the front side wall of the console 22. The console 22 is a component for controlling the experimental device. A display screen 23 is provided on the console 22 for viewing the parameters during the experiment. Operation buttons 24 are provided on the console 22 to control the experimental device through the operation buttons 24.

[0044] An experimental method for an asphalt mixture rutting experimental device, the experimental method includes:

[0045] S1. By rotating the rotating block 20, the rotating rod 15 is driven to rotate. When the rotating rod 15 rotates, it can drive the first clamping plate 18 and the second clamping plate 19 to move away from each other, so that the first clamping plate 18 and the second clamping plate 19 do not clamp the specimen mold 21, and thus the specimen mold 21 is removed from the support plate 12;

[0046] S2. Pour the asphalt mixture to be compacted into the specimen mold 21, making the asphalt mixture in the specimen mold 21 as flat as possible;

[0047] S3. Place the specimen mold 21 back on the support plate 12 again, so that the first clamping plate 18 and the second clamping plate 19 are on the front and rear sides of the specimen mold 21. Then, by rotating the rotating block 20, the rotating rod 15 is driven to rotate. By the rotation of the rotating rod 15, the first clamping plate 18 and the second clamping plate 19 are driven to move closer to each other, so that the first clamping plate 18 and the second clamping plate 19 clamp the specimen mold 21 to ensure the stability of the specimen mold 21;

[0048] S4. The lowering of the liftable support frame 2 causes the arc-shaped compaction plate 6 to contact the asphalt mixture on the sample mold 21 and exerts a downward pressure on the asphalt mixture; then the hydraulic cylinder 7 is activated, causing the hydraulic cylinder 7 to drive the drive rod 8 to move, thereby causing the swing arm 5 to rotate through the drive rod 8, so that the arc-shaped compaction plate 6 rotates with the swing arm 5. When the arc-shaped compaction plate 6 rotates, it can drive the sample mold 21 to move, causing the support plate 12 to slide on the support block 9, thereby compacting the asphalt mixture in the sample mold 21.

[0049] S5. After the asphalt mixture in the sample mold 21 is compacted by the arc-shaped roller 6 for a certain period of time, the arc-shaped roller 6 is closed, and the sample mold 21 is removed from the support plate 12 by rotating the rotating block 20. The sample mold 21 is rotated 180 degrees and placed back on the support plate 12. After fixing, the compaction operation is carried out again. This process is repeated.

[0050] As a further improvement of the present invention, the time for the arc-shaped compaction plate 6 to compact the asphalt mixture in the sample mold 21 is 1 to 3 minutes, and the number of times the sample mold 21 is reciprocated for compaction is 6 to 10 times.

[0051] As can be seen from the above technical solutions, the present invention has the following beneficial effects:

[0052] This invention features a rotating rod with both positive and negative threads, on which a pair of clamping plates are installed. The rotation of the rotating rod causes the clamping plates to move, thereby clamping and fixing the sample mold. This makes it easy to fix the sample mold. At the same time, when the asphalt mixture inside the sample mold needs to be rotated during compaction, the rotating rod makes it easy to disassemble and assemble the sample mold, thus facilitating the rotation of the sample mold.

[0053] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0054] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A test apparatus for rutting asphalt mixtures, comprising a base, characterized in that, A liftable support frame is fixedly connected to the base. A pair of mounting plates are fixedly connected to the lower end of the upper wall panel of the liftable support frame. A swing arm is rotatably connected between the pair of mounting plates. An arc-shaped pressing plate is fixedly connected to the lower end of the swing arm. A pair of support blocks are fixedly connected to the base. The pair of support blocks are located between the two side walls of the liftable support frame. A slide rail is provided inside the support block. A slider is slidably connected inside the slide rail. A support plate is fixedly connected to the slider. A pair of support blocks are fixedly connected to the front and rear ends of the support plate. A pair of rotating rods are rotatably connected between the pair of support blocks. The pair of rotating rods are located on the left and right sides of the support blocks. The rotating rods are provided with positive threads and negative threads. A first clamping plate is threaded to the positive thread, and a second clamping plate is threaded to the negative thread.

2. The asphalt mixture rutting test apparatus according to claim 1, characterized in that, A pair of rotating shafts are fixedly connected to the left and right side walls of the swing arm, and the pair of rotating shafts are rotatably connected to the pair of mounting plates.

3. The asphalt mixture rutting test apparatus according to claim 1, characterized in that, A hydraulic cylinder is installed on the liftable support frame, and a drive rod is provided at the lower end of the hydraulic cylinder. The lower end of the drive rod is installed on the swing arm.

4. The asphalt mixture rutting test apparatus according to claim 1, characterized in that, Each pair of support blocks is equipped with a pair of bearings, and the two ends of the rotating rod are respectively installed in the bearings installed on the pair of support blocks.

5. The asphalt mixture rutting test apparatus according to claim 4, characterized in that, One end of the rotating rod on the front side passes through the bearing on the front side and is positioned at the front end. A rotating block is fixedly connected to the end of the rotating rod positioned at the front end of the bearing.

6. The asphalt mixture rutting test apparatus according to claim 1, characterized in that, The support plate is provided with a sample mold, and the first clamping plate and the second clamping plate are located on the front and rear sides of the sample mold, respectively.

7. The asphalt mixture rutting test apparatus according to claim 1, characterized in that, A control console is mounted on the liftable support frame, and the front side wall of the control console is inclined.

8. The asphalt mixture rutting test apparatus according to claim 7, characterized in that, The console is equipped with a display screen on its front side wall and multiple operation buttons on its front side wall.

9. A test method for an asphalt mixture rutting test apparatus, characterized in that, The experimental methods include: S1. By rotating the rotating block, the rotating rod is driven to rotate. When the rotating rod rotates, it can drive the first clamping plate and the second clamping plate to move away from each other, so that the first clamping plate and the second clamping plate will not clamp the sample mold, thereby removing the sample mold from the support plate. S2. Pour the asphalt mixture that needs to be compacted into the sample mold, so that the asphalt mixture in the sample mold is kept as flat as possible. S3. Place the sample mold back on the support plate so that the first clamping plate and the second clamping plate are on the front and rear sides of the sample mold. Then, by rotating the rotating block, the rotating rod is driven to rotate. The rotation of the rotating rod drives the first clamping plate and the second clamping plate to move closer to each other, so that the first clamping plate and the second clamping plate clamp the sample mold and ensure the stability of the sample mold. S4. The lowering of the liftable support frame brings the arc-shaped compaction plate into contact with the asphalt mixture on the sample mold, applying a downward pressure force to the asphalt mixture. Then, the hydraulic cylinder is activated, causing the hydraulic cylinder to drive the drive rod to move. This, in turn, causes the swing arm to rotate, making the arc-shaped compaction plate rotate along with the swing arm. As the arc-shaped compaction plate rotates, it moves the sample mold, causing the support plate to slide on the support block, thereby compacting the asphalt mixture inside the sample mold. S5. After compacting the asphalt mixture in the sample mold with the arc-shaped roller for a certain period of time, close the arc-shaped roller, remove the sample mold from the support plate by rotating the rotating block, rotate the sample mold, put it back on the support plate, fix it, and then perform the compaction operation again. Repeat this process.

10. The experimental method of the asphalt mixture rutting test apparatus according to claim 9, characterized in that, The time for the arc-shaped compaction plate to compact the asphalt mixture in the sample mold is 1 to 3 minutes, and the number of times the sample mold is compacted is 6 to 10.

Images