Asphalt concrete fracture energy and bonding strength calculation test piece molding mold device

Abstract

The utility model discloses an asphalt concrete fracture energy and bonding strength calculation test piece moulding mould device, and relates to the technical field of asphalt concrete performance detection, the asphalt concrete fracture energy and bonding strength calculation test piece moulding mould device comprises a bottom plate, a plurality of first side plates and a plurality of second side plates, the first side plates and the second side plates are arranged on the top of the bottom plate, a supporting frame is fixedly arranged at the bottom of the bottom plate, fixing frames are fixedly arranged on the side walls of the periphery of the bottom plate, sliding holes are formed in the upper ends of the interiors of the fixing frames, sliding blocks are arranged in the sliding holes in a sliding mode, connecting plates are fixedly arranged at the tops of the sliding blocks, and connecting frames are arranged on the side walls of the connecting plates through adjusting mechanisms. According to the bottom plate, the first side plates, the second side plates, the supporting frames, the fixing frames, the sliding blocks, the connecting plates, the connecting frames, the positioning bolts and the synchronous driving mechanism, the first side plates and the second side plates can be rapidly connected and separated, the demolding efficiency after a test piece is formed is improved, and the use convenience of the mold is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of asphalt concrete performance detection, and particularly relates to a die device for manufacturing specimens for calculating the fracture energy and bonding strength of asphalt concrete. Background Technique

[0002] The fracture energy and bonding strength of asphalt concrete are important indicators for evaluating the performance of asphalt concrete.

[0003] After retrieval, the patent number CN201410394458.X discloses a test method for the mode II fracture energy of a bonding interface. This utility provides a test method for the mode II fracture energy of a bonding interface. The test method includes the following steps: respectively manufacturing a first specimen with a bonding interface and a second specimen with the same bonding interface and a prefabricated crack at the interface, respectively performing semi-side tensile or semi-side compression tests on the first specimen and the second specimen to obtain load-displacement curves, and calculating the obtained curves to obtain the mode II fracture energy of the bonding interface. The test method provided by this utility can effectively avoid other types of fracture components that may occur at the bonding interface during the test process, and eliminate the influence of energy dissipation caused by other reasons on the test results, so as to accurately test the pure mode II fracture energy of the bonding interface;

[0004] The patent number CN201910364195.0 discloses a test method for the tensile bonding strength of concrete, providing a test method for the tensile bonding strength, including the following steps: (1) manufacturing a base specimen, including manufacturing a concrete base specimen or a base specimen of other inorganic materials. The concrete base specimen needs to be prepared in advance, and the strength grade and mix ratio should be the same as the design or old concrete, and it should be cured under standard conditions for 28 days for later use; the size of the base specimen is 150mm×150mm×50mm, and the bonding contact surface is manually roughened to make the average surface texture depth 2-3m; a group of specimens should manufacture six base specimens; (2) manufacturing a special tensile fixture, manufacturing an upper fixture and a lower fixture according to the specimen size; (3) preparing bonding strength specimens, a total of six are manufactured; (4) respectively performing tensile bonding strength tests on the six bonding strength specimens; (5) obtaining test results. Through this method, the bonding strength of the bonding surface after bonding concrete and other inorganic materials in an ideal state by different methods can be obtained.

[0005] It can be concluded from the above-mentioned published documents that specimens need to be prepared when detecting the fracture energy and viscosity of asphalt concrete. The specimens are usually prepared in a die, and the die generally uses multiple templates for cooperation, and the multiple templates are disassembled after the specimen preparation is completed. The existing die templates are connected by multiple screw-nut and other components, resulting in cumbersome disassembly of the templates. At the same time, a long time of combination is required before multiple moldings, reducing the use convenience of the die. Summary of the Utility Model

[0006] In view of the problems existing in the existing mold device for fabricating specimens for calculating the fracture energy and bond strength of asphalt concrete, the present utility model is proposed.

[0007] Therefore, the purpose of the present utility model is to provide a mold device for fabricating specimens for calculating the fracture energy and bond strength of asphalt concrete, which solves the problems that the outer templates of the mold need to spend a lot of time for disassembly and assembly before and after specimen forming, reducing the specimen preparation efficiency and the convenience of using the mold.

[0008] In order to achieve the above purpose, the present utility model provides the following technical solutions:

[0009] A mold device for fabricating specimens for calculating the fracture energy and bond strength of asphalt concrete, comprising a bottom plate and a plurality of first side plates and second side plates placed on the top of the bottom plate. Slots are provided on the side of the two first side plates close to each other, and a partition is inserted between the two slots. A support frame is fixedly provided at the bottom of the bottom plate, and fixing frames are fixedly provided on the side walls around the bottom plate. A sliding hole is provided at the upper end inside the fixing frame, and a sliding block is slidably provided in the sliding hole. A connecting plate is fixedly provided at the top of the sliding block, and a connecting frame is provided on the side wall of the connecting plate through an adjusting mechanism. A positioning bolt is threadedly penetrated inside the connecting frame, and the positioning bolt is connected and cooperated with the first side plate and the second side plate;

[0010] A synchronous driving mechanism is provided between the plurality of sliding blocks for driving the plurality of sliding blocks to move synchronously.

[0011] Preferably, the synchronous driving mechanism includes a plurality of driving screws, and the far ends of the plurality of driving screws are respectively rotatably connected to the side parts of the inner walls of the plurality of support frames. The driving screws are threadedly penetrated inside the sliding blocks. A vertical rod is rotatably provided at the bottom of the inner wall of the support frame, and bevel gears are fixedly provided at the close ends of the vertical rod and the plurality of driving screws, and the plurality of bevel gears are arranged in cooperation.

[0012] Preferably, a rotating block is fixedly sleeved at the upper end of the vertical rod.

[0013] Preferably, the adjusting mechanism includes an adjusting screw, the end of the adjusting screw is rotatably connected to the side part of the connecting plate, and an internally threaded tube is threadedly sleeved on the rod wall of the adjusting screw. The end of the internally threaded tube is fixedly connected to the connecting frame.

[0014] Furthermore, threaded grooves for connecting with the positioning bolt are provided on the outer walls of the first side plate and the second side plate.

[0015] Preferably, the fixing frame is arranged in an L shape.

[0016] In the above technical solution, the technical effects and advantages provided by the present utility model are as follows:

[0017] With the bottom plate, the first side plate, the second side plate, the support frame, the fixing frame, the slider, the connecting plate, the connecting frame, the positioning bolt and the synchronous driving mechanism provided in the present utility model, multiple first side plates and second side plates can be quickly connected and separated, the demoulding efficiency after the specimen is formed can be improved, and the use convenience of the mold can be improved.

[0018] With the connecting plate, the connecting frame and the adjusting mechanism provided in the present utility model, the setting positions of the first side plate and the second side plate can be determined according to specimens of different preparation specifications, and the outer side template of the specimen can be quickly separated after mold making, improving the use versatility of the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present utility model, and those of ordinary skill in the art can also obtain other drawings based on these drawings.

[0020] Figure 1 It is a schematic structural diagram of the present utility model;

[0021] Figure 2 It is a schematic side structural diagram of the present utility model;

[0022] Figure 3 It is of the present utility model Figure 1 Enlarged schematic view of part A.

[0023] Description of the reference numerals:

[0024] 1. Bottom plate; 2. First side plate; 3. Second side plate; 4. Partition plate; 5. Support frame; 6. Fixing frame; 7. Slider; 8. Connecting plate; 9. Connecting frame; 10. Positioning bolt; 11. Driving screw; 12. Vertical rod; 13. Bevel gear; 14. Rotating block; 15. Adjusting screw; 16. Internal thread tube. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] In order to enable those skilled in the art to better understand the technical solutions of the present utility model, the following will further introduce the present utility model in detail in conjunction with the drawings.

[0026] An embodiment of the present utility model discloses a mold device for calculating specimens of asphalt concrete fracture energy and bond strength.

[0027] The present utility model provides as Figures 1-3The shown mold device for calculating the fracture energy and bond strength of asphalt concrete includes a bottom plate 1 and a plurality of first side plates 2 and second side plates 3 placed on the top of the bottom plate 1. Slots are provided on the side of the two first side plates 2 close to each other, and a partition plate 4 is inserted between the two slots. A support frame 5 is fixedly provided at the bottom of the bottom plate 1, and fixing frames 6 are fixedly provided on the peripheral side walls of the bottom plate 1. The fixing frames 6 are arranged in an L shape. A sliding hole is provided at the upper end inside the fixing frame 6, and a slider 7 is slidably arranged in the sliding hole. A connecting plate 8 is fixedly provided at the top of the slider 7. A connecting frame 9 is provided on the side wall of the connecting plate 8 through an adjusting mechanism. A positioning bolt 10 is threadedly inserted inside the connecting frame 9, and the positioning bolt 10 is connected and matched with the first side plate 2 and the second side plate 3. Thread grooves for connecting with the positioning bolt 10 are provided on the outer walls of the first side plate 2 and the second side plate 3;

[0028] A synchronous driving mechanism for driving multiple sliders 7 to move synchronously is provided between the multiple sliders 7. The synchronous driving mechanism includes a plurality of driving screws 11. The far ends of the plurality of driving screws 11 are respectively rotatably connected to the inner side parts of the inner walls of the plurality of support frames 5. The driving screws 11 are threadedly inserted inside the sliders 7. A vertical rod 12 is rotatably provided at the bottom of the inner wall of the support frame 5. Bevel gears 13 are fixedly provided at the near ends of the vertical rod 12 and the plurality of driving screws 11. The plurality of bevel gears 13 are cooperatively arranged. A rotating block 14 is fixedly sleeved at the upper end of the vertical rod 12.

[0029] When preparing specimens before asphalt concrete testing, the multiple first side plates 2 and second side plates 3 cooperate with each other. First, a demolding agent is applied to the inner walls of the first side plates 2 and the second side plates 3, and the raw materials are placed between the bottom plate 1, the multiple first side plates 2, and the second side plates 3. Subsequently, the top of the raw materials is leveled by a leveling device. After the asphalt concrete specimens are formed, the rotating block 14 is driven to make the vertical rod 12 rotate. At this time, under the cooperation of the multiple bevel gears 13, the multiple driving screws 11 rotate synchronously. During this process, the multiple sliders 7 slide in the sliding holes driven by the driving screws 11, so that the sliders 7 drive the multiple first side plates 2 and second side plates 3 to separate from each other through the connecting plates 8 and the connecting frames 9, enabling the specimens to quickly complete the demolding work and be directly and conveniently taken out for use. At the same time, before specimen preparation, the multiple first side plates 2 and second side plates 3 can also be quickly assembled, improving the mold assembly efficiency and the specimen preparation efficiency.

[0030] In order to be able to adjust the initial set positions of the multiple first side plates 2 and second side plates 3 according to the specimen preparation specifications, as Figures 2-3 shown, the adjusting mechanism includes an adjusting screw 15. The end of the adjusting screw 15 is rotatably connected to the side of the connecting plate 8. An internally threaded tube 16 is threadedly sleeved on the rod wall of the adjusting screw 15. The end of the internally threaded tube 16 is fixedly connected to the connecting frame 9.

[0031] When it is necessary to prepare test pieces of different specifications, the positions of the first side plate 2 and the second side plate 2 can be determined in advance, and the adjusting screw 15 is rotated while keeping the axial position of the internal thread tube 16 fixed. At this time, the internal thread tube 16 can move horizontally and drive the connecting frame 9 to be connected to the first side plate 2 or the second side plate 3. The positioning bolt 10 is inserted into the thread groove to complete the connection of the first side plate 2 and the second side plate 3. At this time, the first side plate 2 and the second side plate 3 can still be quickly combined and separated before the test piece is formed.

[0032] Only some exemplary embodiments of the present invention have been described by way of illustration above. Without doubt, for those of ordinary skill in the art, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A mold device for preparing asphalt concrete fracture energy and bond strength calculation specimens, comprising a bottom plate (1) and a plurality of first side plates (2) and second side plates (3) placed on top of the bottom plate (1), characterized in that: A slot is provided on the adjacent side of the two first side panels (2), a partition (4) is inserted between the two slots, a support frame (5) is fixedly provided at the bottom of the bottom panel (1), a fixing frame (6) is fixedly provided on the four side walls of the bottom panel (1), a sliding hole is provided at the inner upper end of the fixing frame (6), a slider (7) is slidably provided in the sliding hole, a connecting plate (8) is fixedly provided on the top of the slider (7), a connecting frame (9) is provided on the side wall of the connecting plate (8) through an adjusting mechanism, a positioning bolt (10) is passed through the inner thread of the connecting frame (9), and the positioning bolt (10) is connected and matched with the first side panel (2) and the second side panel (3); A synchronous driving mechanism for driving the multiple sliders (7) to move synchronously is provided between the multiple sliders (7).

2. The asphalt concrete fracture energy and bond strength calculation specimen molding mold device according to claim 1 is characterized in that: The synchronous drive mechanism comprises a plurality of drive screws (11), the ends of the plurality of drive screws (11) being rotatably connected to the inner wall side portions of the plurality of support frames (5) at ends away from each other, the drive screws (11) being threadedly inserted into the interior of the slider (7), a vertical rod (12) being rotatably provided at the bottom of the inner wall of the support frame (5), a bevel gear (13) being fixedly provided at the ends of the vertical rod (12) and the plurality of drive screws (11) being close to each other, and the plurality of bevel gears (13) being arranged in a coordinated manner.

3. The asphalt concrete fracture energy and bond strength calculation specimen molding mold device according to claim 2 is characterized in that: A rotating block (14) is fixedly sleeved on the upper end of the vertical rod (12).

4. The asphalt concrete fracture energy and bond strength calculation specimen molding mold device according to claim 1 is characterized in that: The adjusting mechanism comprises an adjusting screw (15), the end of which is rotatably connected to the side of the connecting plate (8), an internally threaded tube (16) is threadedly sleeved on the rod wall of the adjusting screw (15), and the end of the internally threaded tube (16) is fixedly connected to the connecting frame (9).

5. The asphalt concrete fracture energy and bond strength calculation specimen molding mold device according to claim 1 is characterized in that: The outer walls of the first side plate (2) and the second side plate (3) are both provided with threaded grooves for connection with positioning bolts (10).

6. The asphalt concrete fracture energy and bond strength calculation specimen molding mold device according to claim 1, characterized in that: The fixing frame (6) is arranged in an L shape.

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