CN212111080U - Test device for obtaining asphalt mortar bonding force in test piece based on direct stretching - Google Patents
Test device for obtaining asphalt mortar bonding force in test piece based on direct stretching Download PDFInfo
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- CN212111080U CN212111080U CN201921902852.4U CN201921902852U CN212111080U CN 212111080 U CN212111080 U CN 212111080U CN 201921902852 U CN201921902852 U CN 201921902852U CN 212111080 U CN212111080 U CN 212111080U
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Abstract
The utility model provides a test device for acquiring asphalt mortar bonding force in a test piece based on direct stretching, which comprises a stretching assembly, a clamp assembly and a driving assembly; the clamp assembly is used for clamping a test piece and fixing the test piece; the stretching assembly comprises a stretching cylinder and a joint, wherein the stretching cylinder is used for providing stretching force; the stretching cylinder is connected with the joint, asphalt mortar is bonded on the test piece, and the cured asphalt mortar is grabbed through the joint, so that the stretching cylinder stretches the asphalt mortar, and the asphalt mortar bonding force is obtained; the clamp assembly is arranged on the movable end of the driving assembly, and the clamp assembly is driven to move in the horizontal direction through the driving assembly, so that the test piece moves to the corresponding joint; through adjusting the test piece position for connect corresponding test piece, thereby realize tensile test, the utility model discloses simple structure, the maintenance of being convenient for.
Description
Technical Field
The utility model belongs to pavement material mechanical properties tests field, concretely relates to test device based on asphalt mortar adhesion in the direct tensile acquisition test piece.
Background
With the intensive research on pavement materials, the microscopic structure of the asphalt mixture gets more and more attention. Because the fracture of the asphalt mixture at normal temperature usually occurs at the interface of aggregate and mortar, the research on the mechanism and the improvement on the bonding property of the interface has great significance, and the acquisition of the interface bonding force is the basis of the research field;
and for the convenience of surveying aggregate and asphalt mortar interface cohesive force, the asphalt mortar molding is in the model that conveniently snatchs, links to each other the model with the aggregate through the asphalt mortar in the model again, snatchs the model through experimental facilities and carries out tensile test, and because there is the error in the model and the aggregate hookup location for the unable accurate jointing equipment of model and aggregate, thereby cause the test failure, in order to solve above-mentioned problem, the test device based on asphalt mortar cohesive force in the direct tensile acquisition test piece is badly needed.
SUMMERY OF THE UTILITY MODEL
In order to overcome the not enough of prior art, the utility model provides a test device based on pitch mortar adhesion stress in the direct tensile acquisition test piece conveniently adjusts the test piece position for the connecting rod links to each other with the chuck, thereby realizes tensile test, the device simple structure, convenient to use.
The utility model provides a test device for acquiring asphalt mortar bonding force in a test piece based on direct stretching, which comprises a stretching assembly, a clamp assembly and a driving assembly;
the clamp assembly is used for clamping a test piece and fixing the test piece;
the stretching assembly comprises a stretching cylinder and a joint, wherein the stretching cylinder is used for providing stretching force; the stretching cylinder is connected with the joint, asphalt mortar is bonded on the test piece, and the cured asphalt mortar is grabbed through the joint, so that the stretching cylinder stretches the asphalt mortar, and the asphalt mortar bonding force is obtained;
the clamp assembly is installed on the movable end of the driving assembly, and the clamp assembly is driven to move in the horizontal direction through the driving assembly, so that the test piece moves to the position corresponding to the joint.
Preferably, the device also comprises a die carrier, wherein the die carrier comprises an upper die plate, a lower die plate and guide pillars, and the upper die plate and the lower die plate are fixedly connected through the guide pillars;
the stretching cylinder is arranged on the upper template; the driving assembly is installed on the lower template.
Preferably, the stretching assembly further comprises a push plate, the stretching cylinder pushes the push plate, and the joint is mounted on the push plate;
and a guide sleeve for guiding the push plate to move is embedded in the push plate and is in sliding connection with the guide pillar.
Preferably, the clamp assembly comprises a mold for placing a test piece, a plurality of pneumatic clamping jaws for clamping the test piece, and a mounting plate, wherein the mold is fixed on the mounting plate, the pneumatic clamping jaws are mounted on the mounting plate, and the mounting plate is connected with the movable end of the driving assembly.
Preferably, the die is provided with a guide groove for moving the clamping jaw on the pneumatic clamping jaw, and the clamping jaw on the pneumatic clamping jaw slides in the guide groove.
Preferably, the driving assembly comprises a guide plate, a cylinder and a motor, the motor drives the screw rod to enable the clamp assembly to slide on the guide plate along the axial direction of the screw rod, and the cylinder pushes the guide plate to move along the direction perpendicular to the axial direction of the screw rod.
Preferably, the joint comprises two pressing blocks, and the test piece is wrapped by the two pressing blocks;
and the pressing blocks are provided with locking screw holes, and screws are connected through the locking screw holes in a threaded manner, so that the two pressing blocks compress the test piece.
Preferably, the test piece includes aggregate, be used for holding the copper nail, sleeve, the connecting rod of pitch mortar, the one side that holds pitch mortar on the copper nail contacts with aggregate, through the sleeve will the copper nail is connected with the connecting rod, the briquetting compresses tightly the connecting rod.
Preferably, the copper nails are provided with grooves, the asphalt mortar is placed in the grooves, and the depth of the grooves is 2-5 mm.
Preferably, barbs are included in the grooves for limiting the cured asphalt mortar from escaping from the copper nails.
Compared with the prior art, the beneficial effects of the utility model reside in that:
the utility model provides a test device based on pitch mortar adhesion in direct tensile acquisition test piece, through drive assembly drive anchor clamps subassembly for test piece on the anchor clamps subassembly is corresponding with tensile subassembly, thereby connects on the tensile subassembly and test piece, and then realizes tensile test, the device simple structure, convenient to use, the maintenance of being convenient for.
The above description is only an overview of the technical solution of the present invention, and in order to make the technical means of the present invention clearer and can be implemented according to the content of the description, the following detailed description is made with reference to the preferred embodiments of the present invention and accompanying drawings. The detailed description of the present invention is given by the following examples and the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without undue limitation to the invention. In the drawings:
fig. 1 is a schematic perspective view of an embodiment of the present invention;
fig. 2 is a schematic perspective view illustrating a second embodiment of the present invention;
fig. 3 is an exploded view of the present invention in one embodiment;
fig. 4 is a schematic perspective view of a clamp assembly according to an embodiment of the present invention;
FIG. 5 is a half-sectional view of a test piece in an embodiment of the present invention;
FIG. 6 is an enlarged partial schematic view of FIG. 5;
fig. 7 is a front view of the present invention in one embodiment;
FIG. 8 is an enlarged partial schematic view of FIG. 7;
fig. 9 is a schematic partial perspective view of a stretching assembly according to an embodiment of the present invention;
FIG. 10 is an enlarged partial schematic view of FIG. 9;
fig. 11 is a half-sectional view of a brass nail in another embodiment of the present invention.
Shown in the figure:
1. a mold frame; 11. mounting a template; 12. a lower template; 13. a guide post; 2. a stretching assembly; 21. stretching the cylinder; 22. pushing the plate; 23. a guide sleeve; 24. a joint; 241. briquetting; 242. locking the screw hole; 3. a clamp assembly; 31. a mold; 32. a pneumatic clamping jaw; 33. mounting a plate; 4. a drive assembly; 41. a guide plate; 42. a cylinder; 43. a motor; 5. a test piece; 51. aggregating; 52. copper nails; 521. a groove; 53. a sleeve; 54. a connecting rod.
Detailed Description
The foregoing and other objects, features, aspects and advantages of the present invention will become more apparent to those skilled in the art from the following detailed description, which, taken in conjunction with the annexed drawings, discloses a more detailed description of the present invention, which will enable those skilled in the art to make and use the present invention. In the drawings, the shape and size may be exaggerated for clarity, and the same reference numerals will be used throughout the drawings to designate the same or similar components. In the following description, terms such as center, thickness, height, length, front, back, rear, left, right, top, bottom, upper, lower, and the like are used based on the orientation or positional relationship shown in the drawings. In particular, "height" corresponds to the dimension from top to bottom, "width" corresponds to the dimension from left to right, and "depth" corresponds to the dimension from front to back. These relative terms are for convenience of description and are not generally intended to require a particular orientation. Terms concerning attachments, coupling and the like (e.g., "connected" and "attached") refer to a relationship wherein structures are secured or attached, either directly or indirectly, to one another through intervening structures, as well as both movable or rigid attachments or relationships, unless expressly described otherwise.
The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that the embodiments or technical features described below can be arbitrarily combined to form a new embodiment without conflict.
As shown in fig. 5 and 6, in the preferred embodiment, the test piece 5 includes an aggregate 51, a copper nail 52 for placing asphalt mortar, a sleeve 53, and a connecting rod 54, one surface of the copper nail 52 for placing asphalt mortar contacts with the aggregate 51, the copper nail 52 is connected with the connecting rod 54 through the sleeve 53, the connecting rod 54 is connected with the tensile test device, and the connecting rod 54 is used as a connecting member between the test piece 5 and the tensile test device, so as to facilitate the tensile test device to grab the test piece 5.
Wherein, the copper nail 52 is provided with a groove 521, the asphalt mortar is contained in the groove 521, and the depth of the groove 521 is 2-5 mm; one side of the copper nail 52, provided with the groove 521, is in contact with the aggregate 51, asphalt mortar is molded through the groove 521, the copper nail 52 is connected with the aggregate 51 through the asphalt mortar, and the adhesive force of the adhesion part of the asphalt mortar and the aggregate 51 is tested through the stretching of the copper nail 52.
As shown in fig. 11, in another preferred embodiment, a barb is included in the groove 521, so that the groove 521 is in an inverted step shape, and the barb is mainly used for limiting the cured and molded asphalt mortar to be separated from the copper nail 51 in the stretching process, and ensuring the smooth implementation of the test.
As shown in fig. 1 to 4, the test device for obtaining the asphalt mortar bonding force in the test piece based on direct stretching, which is required for realizing the tensile test of the test piece 5, comprises a stretching assembly 2, a clamp assembly 3 and a driving assembly 4; the clamp assembly 3 is used for clamping a test piece 5 and fixing the test piece 5; the stretching assembly 2 comprises a stretching cylinder 21 for providing stretching force, a joint 24; the stretching cylinder 21 is connected with the joint 24, and is connected with the test piece 5 through the joint 24, so that the stretching cylinder 21 stretches the test piece 5, and a stretching experiment is realized; the clamp assembly 2 is arranged on the movable end of the driving assembly 4, and the driving assembly 4 drives the clamp assembly 2 to move in the horizontal direction, so that the test piece 5 moves to the corresponding joint 24; because the copper nail 52 in the test piece 5 and gather materials 51's hookup location produces the deviation easily, adopt general tensile test device can't fix gather materials 51 and snatch copper nail 52 simultaneously, and order about the anchor clamps subassembly 3 of centre gripping test piece 5 through drive assembly 4 and move in the horizontal direction, conveniently correspond joint 24 on the tensile subassembly 2 with connecting rod 54 to tensile test piece 5.
The testing device also comprises a die carrier 1, wherein the die carrier 1 comprises an upper template 11, a lower template 12 and a guide post 13, and the upper template 11 and the lower template 12 are fixedly connected through the guide post 13; the stretching cylinder 21 is arranged on the upper template 11; the drive assembly 4 is mounted on the lower platen 12.
As shown in fig. 9, the stretching assembly 2 further comprises a push plate 22, the stretching cylinder 21 pushes the push plate 22, and the joint 24 is mounted on the push plate 22; the push plate 22 is embedded with a guide sleeve 23, and the guide sleeve 23 is sleeved on the guide post 13, so that the guide sleeve 23 is slidably connected with the guide post 13, and the motion direction of the push plate 22 is guided by the guide sleeve 23 and the guide post 13.
As shown in fig. 4, the fixture assembly 3 includes a mold 31 for placing the test piece 5, a plurality of pneumatic clamping jaws 32, and a mounting plate 33; the pneumatic clamping jaw 32 comprises a clamping jaw and a micro cylinder, the clamping jaw is pushed by the micro cylinder to clamp the test piece 5, the die 31 is fixed on the mounting plate 33, the pneumatic clamping jaw 32 is mounted on the mounting plate 33, and the mounting plate 33 is connected with the movable end of the driving assembly 4; wherein, the die 31 is provided with a guide groove for facilitating the movement of the clamping jaw on the pneumatic clamping jaw 32, and the clamping jaw on the pneumatic clamping jaw 32 slides in the guide groove.
As shown in fig. 3, the driving assembly 4 includes a guide plate 41, a cylinder 42, a motor 43, a lead screw is disposed on the guide plate 41, the clamp assembly 3 is in threaded connection with the lead screw, the lead screw is driven by the motor 43 to enable the clamp assembly 3 to slide on the guide plate 41 along the axial direction of the lead screw, the clamp assembly 3 is enabled to move along the Y-axis direction, the movable end of the cylinder 42 is connected with the guide plate 41, the cylinder 42 pushes the guide plate 41 to move along the axial direction perpendicular to the lead screw, the clamp assembly 3 is enabled to move along the X-axis direction, the clamp assembly 3 is enabled to move in the horizontal direction through the cylinder 42, the guide rail is disposed along the moving direction of the clamp assembly 3, a slide block is mounted on the clamp assembly 3, and the guide rail is in sliding connection with the slide.
As shown in fig. 7 to 10, the joint 24 includes two pressing pieces 241, and the test piece 5 is wrapped by the two pressing pieces 241; the pressing blocks 241 are provided with locking screw holes 242, screws are connected through the locking screw holes 242 in a threaded mode, and the distance between the two pressing blocks 241 is adjusted through rotating the screws, so that the two pressing blocks 241 press the connecting rod 54.
Through the utility model discloses the acquisition that realizes gathers materials and asphalt mortar interface adhesion force's direct tensile test includes following step:
1) step 1: cutting basalt or other common pavement materials to obtain cylindrical aggregate 51 with the thickness of 50mm and the diameter of 100mm, and preserving heat at 180 ℃ for 4 hours;
2) step 2: a small stirrer is adopted to form asphalt mortar, the asphalt mortar is placed into the copper nails 52 to be stretched, and the asphalt mortar is contained in the grooves 521 at the bottoms of the copper nails 52;
3) and step 3: reversely buckling the copper nails 52 on the aggregate 51, and cooling to form;
4) and 4, step 4: according to the test conditions, the direct tensile test apparatus is used to perform a direct tensile test on the test piece 5.
In a preferred embodiment, the tensile assembly 2 includes a detection unit therein, the detection unit in the tensile assembly 2 is used for monitoring parameters such as displacement and load in the test process, and the realization principle of obtaining the parameters such as displacement and load is preferably the detection principle of the UTM universal tester.
Calculation of tensile breaking energy:
wherein: gf- -energy to break (J/m)2)
Wf- - -work of rupture (J)
AreaingArea of fracture surface (mm)2)
The utility model provides a test device for acquiring asphalt mortar bonding force in a test piece based on direct stretching, which drives a clamp assembly through a driving assembly, so that the test piece on the clamp assembly corresponds to a stretching assembly, and a joint and the test piece on the stretching assembly are stretched, thereby realizing a tensile test; asphalt mortar is formed through the grooves formed in the copper nails and is connected with aggregate, so that the area of a fracture surface can be conveniently calculated; the connecting rod is clamped through the two pressing blocks, the two pressing blocks are screwed through the screws, so that the two pressing blocks are connected with the connecting rod, and the device is simple in structure, convenient to use and convenient to maintain.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way; the utility model can be smoothly implemented by the ordinary technicians in the industry according to the drawings and the above description; however, those skilled in the art should understand that changes, modifications and variations made by the above-described technology can be made without departing from the scope of the present invention, and all such changes, modifications and variations are equivalent embodiments of the present invention; meanwhile, any changes, modifications, evolutions, etc. of the above embodiments, which are equivalent to the actual techniques of the present invention, still belong to the protection scope of the technical solution of the present invention.
Claims (10)
1. Test device based on pitch mortar adhesion in direct tensile acquisition test piece, its characterized in that: comprises a stretching component (2), a clamp component (3) and a driving component (4);
the clamp assembly (3) is used for clamping a test piece (5) and fixing the test piece (5);
the stretching assembly (2) comprises a stretching cylinder (21) for providing stretching force and a joint (24); the stretching cylinder (21) is connected with the joint (24), asphalt mortar is bonded on the test piece (5), and the solidified asphalt mortar is grabbed through the joint (24), so that the stretching cylinder (21) stretches the asphalt mortar, and the asphalt mortar bonding force is obtained;
the clamp assembly (3) is mounted on the movable end of the driving assembly (4), and the clamp assembly (3) is driven to move in the horizontal direction by the driving assembly (4), so that the test piece (5) moves to the position corresponding to the joint (24).
2. The test device for obtaining the bonding force of the asphalt mortar in the test piece based on the direct tension as set forth in claim 1, wherein: the die carrier (1) comprises an upper template (11), a lower template (12) and a guide post (13), wherein the upper template (11) and the lower template (12) are fixedly connected through the guide post (13);
the stretching cylinder (21) is installed on the upper template (11); the driving assembly (4) is installed on the lower template (12).
3. The test device for obtaining the bonding force of the asphalt mortar in the test piece based on the direct tension as set forth in claim 2, wherein: the stretching assembly (2) further comprises a push plate (22), the stretching cylinder (21) pushes the push plate (22), and the joint (24) is installed on the push plate (22);
a guide sleeve (23) for guiding the push plate (22) to move is embedded in the push plate (22), and the guide sleeve (23) is connected with the guide post (13) in a sliding mode.
4. The test device for obtaining the bonding force of the asphalt mortar in the test piece based on the direct tension as set forth in claim 1, wherein: anchor clamps subassembly (3) are including mould (31), a plurality of pneumatic clamping jaw (32), the mounting panel (33) that are used for pressing from both sides tight test piece (5) that are used for placing test piece (5), mould (31) are fixed on mounting panel (33), pneumatic clamping jaw (32) are installed on mounting panel (33), mounting panel (33) with the portable end of drive assembly (4) is connected.
5. The test device for obtaining the bonding force of the asphalt mortar in the test piece based on the direct tension as set forth in claim 4, wherein: the die (31) is provided with a guide groove for moving the clamping jaw on the pneumatic clamping jaw (32), and the clamping jaw on the pneumatic clamping jaw (32) slides in the guide groove.
6. The test device for obtaining the bonding force of the asphalt mortar in the test piece based on the direct tension as set forth in claim 1, wherein: the driving assembly (4) comprises a guide plate (41), an air cylinder (42) and a motor (43), the motor (43) drives a screw rod to enable the clamp assembly (3) to slide on the guide plate (41) along the axial direction of the screw rod, and the air cylinder (42) pushes the guide plate (41) to move along the direction perpendicular to the axial direction of the screw rod.
7. The test device for obtaining the bonding force of the asphalt mortar in the test piece based on the direct tension as set forth in claim 1, wherein: the joint (24) comprises two pressing blocks (241), and the test piece (5) is wrapped by the two pressing blocks (241);
and the pressing blocks (241) are provided with locking screw holes (242), and screws are connected through the locking screw holes (242) in a threaded manner, so that the two pressing blocks (241) tightly press the test piece (5).
8. The test device for obtaining the bonding force of the asphalt mortar in the test piece based on the direct tension as set forth in claim 7, wherein: the test piece (5) comprises aggregate (51), a copper nail (52) used for bearing asphalt mortar, a sleeve (53) and a connecting rod (54), wherein one surface of the copper nail (52) bearing the asphalt mortar is in contact with the aggregate (51), the copper nail (52) is connected with the connecting rod (54) through the sleeve (53), and the pressing block (241) presses the connecting rod (54).
9. The test device for obtaining the bonding force of the asphalt mortar in the test piece based on the direct tension as set forth in claim 8, wherein: the copper nail (52) is provided with a groove (521), asphalt mortar is placed in the groove (521), and the depth of the groove (521) is 2-5 mm.
10. The test device for obtaining the bonding force of the asphalt mortar in the test piece based on the direct tension as set forth in claim 9, wherein: barbs for limiting the solidified asphalt mortar from being separated from the copper nails (52) are arranged in the grooves (521).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921902852.4U CN212111080U (en) | 2019-11-06 | 2019-11-06 | Test device for obtaining asphalt mortar bonding force in test piece based on direct stretching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921902852.4U CN212111080U (en) | 2019-11-06 | 2019-11-06 | Test device for obtaining asphalt mortar bonding force in test piece based on direct stretching |
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| CN212111080U true CN212111080U (en) | 2020-12-08 |
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| CN201921902852.4U Active CN212111080U (en) | 2019-11-06 | 2019-11-06 | Test device for obtaining asphalt mortar bonding force in test piece based on direct stretching |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115950820A (en) * | 2023-03-13 | 2023-04-11 | 四川蜀工公路工程试验检测有限公司 | Device and method for measuring interface bonding force of asphalt mortar |
-
2019
- 2019-11-06 CN CN201921902852.4U patent/CN212111080U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115950820A (en) * | 2023-03-13 | 2023-04-11 | 四川蜀工公路工程试验检测有限公司 | Device and method for measuring interface bonding force of asphalt mortar |
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