CN219890912U - Multi-angle test fixture for bonding strength of concrete crack repair material - Google Patents
Multi-angle test fixture for bonding strength of concrete crack repair material Download PDFInfo
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- CN219890912U CN219890912U CN202320718414.2U CN202320718414U CN219890912U CN 219890912 U CN219890912 U CN 219890912U CN 202320718414 U CN202320718414 U CN 202320718414U CN 219890912 U CN219890912 U CN 219890912U
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- annular clamp
- bonding strength
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- 238000012360 testing method Methods 0.000 title claims abstract description 47
- 239000004567 concrete Substances 0.000 title claims abstract description 23
- 239000000463 material Substances 0.000 title claims abstract description 21
- 230000008439 repair process Effects 0.000 title description 4
- 238000004154 testing of material Methods 0.000 claims abstract description 35
- 238000003825 pressing Methods 0.000 claims abstract description 18
- 238000009434 installation Methods 0.000 claims abstract description 4
- 230000006835 compression Effects 0.000 claims description 18
- 238000007906 compression Methods 0.000 claims description 18
- 239000011384 asphalt concrete Substances 0.000 abstract description 13
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 238000009864 tensile test Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 230000001808 coupling effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model provides a multi-angle test fixture for bonding strength of a concrete crack repairing material, which comprises a universal material testing machine truss, wherein a universal material testing machine beam is arranged in the universal material testing machine truss, the outer end of an upper pressing rod is arranged on the universal material testing machine beam, and the outer end of a lower pressing rod is arranged at the bottom of the universal material testing machine truss; the upper pressure bar and the lower pressure bar are coaxially arranged; the inner of the upper pressing rod is provided with an upper arc clamping groove, the inner of the lower pressing rod is provided with a lower arc clamping groove, an annular clamp is clamped between the upper arc clamping groove and the lower arc clamping groove, and the installation angle of the annular clamp in the upper arc clamping groove and the lower arc clamping groove can be adjusted at multiple angles along the circumferential direction. The utility model is based on a universal material testing machine, can accurately test the bonding strength of an asphalt concrete crack repairing interface, accurately reflect the bonding performance of a concrete crack repairing material, and has important significance for improving the performance of a concrete pavement and prolonging the service life of the asphalt concrete pavement.
Description
Technical Field
The utility model belongs to the technical field of road engineering, relates to a testing device, and particularly relates to a multi-angle testing fixture for bonding strength of a concrete crack repairing material.
Background
The bonding strength of the asphalt concrete crack repairing interface greatly influences the asphalt concrete crack repairing effect, the insufficient bonding strength of the repairing interface can cause the problems of secondary cracking, reduced permeability resistance and the like of asphalt concrete under the action of load, water enters the pavement through the cracks, aggregate is caused to fall off under the coupling action of traffic load and environment, and the asphalt pavement is damaged.
At present, the standard test of the adhesive property of the asphalt concrete crack repairing material is an 8-shaped test piece tensile test of a concrete crack repairing structure, and the tensile attraction and the adhesive surface of the concrete are 90 degrees. However, asphalt concrete cracks have different directions and different inclination angles, and the bonding strength of an asphalt concrete crack repairing interface is difficult to accurately reflect by adopting a vertical tensile test. And the existing oblique shear test fixture can only test one angle of interface bonding strength of 30 degrees, 45 degrees or 60 degrees. If the bonding strength of the multi-angle repair interface is to be tested, the required test fixture is relatively complicated.
Disclosure of Invention
Aiming at the defects existing in the prior art, the utility model aims to provide a multi-angle test fixture for the bonding strength of a concrete crack repairing material, which solves the technical problem of redundancy of an asphalt concrete crack repairing interface bonding strength test device in the prior art.
In order to solve the technical problems, the utility model adopts the following technical scheme:
the multi-angle test fixture for the bonding strength of the concrete crack repairing material comprises a universal material testing machine truss, wherein a universal material testing machine beam is arranged in the universal material testing machine truss, the outer end of an upper pressing rod is arranged on the universal material testing machine beam, and the outer end of a lower pressing rod is arranged at the bottom of the universal material testing machine truss; the upper compression bar and the lower compression bar are coaxially arranged.
The inner of going up the depression bar be provided with the arc draw-in groove, the inner of depression bar is provided with down the arc draw-in groove down, go up the arc draw-in groove and block down between the arc draw-in groove and be equipped with annular clamp, annular clamp can carry out the multi-angle along circumference in last arc draw-in groove and lower arc draw-in groove's installation angle.
The annular clamp is of a central symmetry structure and is divided into an upper half part of the annular clamp and a lower half part of the annular clamp which can be detached, and the upper half part of the annular clamp and the lower half part of the annular clamp are buckled together through a special-shaped buckling surface.
The annular clamp is characterized in that an 8-shaped groove is formed in the annular clamp, and the 8-shaped groove is distributed on the upper half part of the annular clamp and the lower half part of the annular clamp in a central symmetry mode.
The utility model also has the following technical characteristics:
a plurality of upper positioning mounting holes are respectively distributed on the upper half part of the annular clamp, and the central axes of the upper positioning mounting holes are vertically arranged on the same equal-diameter circular arc and distributed at equal intervals; a plurality of lower positioning and mounting holes are respectively distributed on the lower half part of the annular clamp, and the central axes of the lower positioning and mounting holes are vertically arranged on the same equal-diameter circular arc and distributed at equal intervals; the upper positioning mounting holes and the lower positioning mounting holes are in one-to-one correspondence and are arranged in a central symmetry manner.
The side wall of the upper arc-shaped clamping groove is provided with a through upper mounting hole, the side wall of the lower arc-shaped clamping groove is provided with a through lower mounting hole, and the upper mounting hole is connected with the upper positioning mounting hole and the lower mounting hole is connected with the lower positioning mounting hole through a pin bolt respectively.
The number of the upper positioning mounting holes is seven, the distribution range of the central axes of the plurality of upper positioning mounting holes is 0-90 degrees, and the phase difference between the adjacent upper positioning mounting holes is 15 degrees; the number of the lower positioning and mounting holes is seven, the distribution range of the central axes of the seven lower positioning and mounting holes is 0-90 degrees, and the phase difference between the adjacent lower positioning and mounting holes is 15 degrees.
The outer end of the upper compression bar is detachably connected with the cross beam of the universal material testing machine through an upper connector; the outer end of the lower pressure rod is detachably connected with the bottom of the universal material testing machine truss through a lower connector.
The upper arc clamping groove, the lower arc clamping groove and the annular clamp are assembled in a clearance fit manner.
The space in the 8-shaped groove can be in clearance fit with the 8-shaped standard test piece.
Compared with the prior art, the utility model has the following technical effects:
the utility model is based on a universal material testing machine, can accurately test the bonding strength of an asphalt concrete crack repairing interface, accurately reflect the bonding performance of a concrete crack repairing material, and has important significance for improving the performance of a concrete pavement and prolonging the service life of the asphalt concrete pavement.
The multi-angle test fixture solves the problem of redundancy of the test fixtures for the bonding strength of the asphalt concrete crack repairing interface, reduces the number of one-to-one test fixtures, perfects the test method for the bonding strength of the asphalt concrete crack repairing interface, and meanwhile, the test fixture is connected with a universal material testing machine through a pin bolt, so that the test fixture is simple and convenient to install and detach, and is simple to operate.
The utility model can be used for a universal testing machine, can accurately describe the change rule of the shearing strength of the material under different environment temperatures, different shearing rates and the like through collecting data by the data sensor, has strong visuality of the test data and lays a foundation for fully grasping the property change of the road material.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the multi-angle test fixture for the bonding strength of the concrete crack repairing material.
Fig. 2 is a schematic structural view of the ring clamp of the present utility model.
Fig. 3 is a schematic structural view of an upper or lower compression bar of the present utility model.
The meaning of each reference numeral in the figures is: the device comprises a truss of a 1-universal material testing machine, a beam of the 2-universal material testing machine, a 3-upper compression bar, a 4-lower compression bar, a 5-upper arc clamping groove, a 6-lower arc clamping groove, a 7-annular clamp, an 8-shaped groove, a 9-upper positioning and mounting hole, a 10-lower positioning and mounting hole, a 11-upper mounting hole, a 12-lower mounting hole, a 13-bolt, a 14-upper connector, a 15-lower connector, a 16-bolt hole and a 17-pair Ji Xianwei convex ring.
701-the upper half of the annular clamp, 702-the lower half of the annular clamp, 703-the special-shaped buckling surface.
The following examples illustrate the utility model in further detail.
Detailed Description
All the components in the present utility model are known in the art unless otherwise specified. For example, the "8" type standard test piece is a known and commonly used "8" type standard test piece.
The following specific embodiments of the present utility model are provided, and it should be noted that the present utility model is not limited to the following specific embodiments, and all equivalent changes made on the basis of the technical scheme of the present utility model fall within the protection scope of the present utility model.
Examples:
the embodiment provides a multi-angle test fixture for the bonding strength of a concrete crack repairing material, which is shown in fig. 1, and comprises a universal material testing machine truss 1, wherein a universal material testing machine beam 2 is arranged in the universal material testing machine truss 1, the outer end of an upper pressing rod 3 is arranged on the universal material testing machine beam 2, and the outer end of a lower pressing rod 4 is arranged at the bottom of the universal material testing machine truss 1; the upper compression bar 3 and the lower compression bar 4 are coaxially arranged.
The inner of the upper pressing rod 3 is provided with an upper arc clamping groove 5, the inner of the lower pressing rod 4 is provided with a lower arc clamping groove 6, an annular clamp 7 is clamped between the upper arc clamping groove 5 and the lower arc clamping groove 6, and the installation angle of the annular clamp 7 in the upper arc clamping groove 5 and the lower arc clamping groove 6 can be adjusted at multiple angles along the circumferential direction.
As shown in fig. 2, the ring clamp 7 has a central symmetrical structure and is divided into a detachable ring clamp upper half 701 and a ring clamp lower half 702, and the ring clamp upper half 701 and the ring clamp lower half 702 are buckled together through a special-shaped buckling surface 703.
The annular clamp 7 is internally provided with an 8-shaped groove 8, and the 8-shaped groove 8 is distributed on the upper half 701 and the lower half 702 of the annular clamp in a central symmetry mode.
As a preferable scheme of the embodiment, as shown in fig. 2, a plurality of upper positioning and mounting holes 9 are respectively arranged on the upper half part 701 of the annular clamp, and central axes of the plurality of upper positioning and mounting holes 9 are vertically arranged on the same equal-diameter circular arc and distributed at equal intervals; a plurality of lower positioning and mounting holes 10 are respectively distributed on the lower half 702 of the annular clamp, and the central axes of the lower positioning and mounting holes 10 are vertically arranged on the same equal-diameter circular arc and distributed at equal intervals; the upper positioning and mounting holes 9 and the lower positioning and mounting holes 10 are arranged in a one-to-one correspondence and are arranged in a central symmetry manner. The mounting angle for realizing the ring clamp 7 can be adjusted at multiple angles along the circumferential direction.
As a preferable scheme of this embodiment, as shown in fig. 3, a through upper mounting hole 11 is formed on a side wall of the upper arc-shaped slot 5, a through lower mounting hole 12 is formed on a side wall of the lower arc-shaped slot 6, and the upper mounting hole 11 and the upper positioning mounting hole 9 and the lower mounting hole 12 and the lower positioning mounting hole 10 are respectively connected through a pin 13. The positioning and mounting device is used for realizing multi-angle adjustment.
As a preferable scheme of the embodiment, as shown in fig. 2, the number of the upper positioning and mounting holes 9 is seven, the distribution range of the central axes of the plurality of upper positioning and mounting holes 9 is 0-90 degrees, and the phase difference between the adjacent upper positioning and mounting holes 9 is 15 degrees; the number of the lower positioning and mounting holes 10 is seven, the distribution range of the central axes of the seven lower positioning and mounting holes 10 is 0-90 degrees, and the phase difference between adjacent lower positioning and mounting holes 10 is 15 degrees; repair interface bond strengths of 0 °,15 °, 30 °, 45 °, 60 °, 75 °, and 90 ° can be tested.
As a preferable scheme of the embodiment, as shown in fig. 1, the outer end of the upper compression bar 3 is detachably connected with the cross beam 2 of the universal material testing machine through an upper connector 14; the outer end of the pressing rod 4 is detachably connected with the bottom of the universal material testing machine truss 1 through a lower connector 15. The replacement and maintenance of the compression bar are convenient.
Further preferably, the upper compression bar 3, the lower compression bar 4, the upper connector 14 and the lower connector 15 are respectively and correspondingly provided with a bolt hole 16, and the bolt 13 is inserted into the bolt holes 16 to realize the corresponding connection in pairs.
Further preferably, the upper compression bar 3 and the lower compression bar 4 are further provided with alignment limiting convex rings 17 respectively, and the alignment limiting convex rings 17 are close to the bolt holes 16 and used for limiting the positions of the upper connection head 14 and the lower connection head 15 respectively, so that the alignment of the bolt holes 16 is facilitated.
As a preferable scheme of the embodiment, the upper arc-shaped clamping groove 5, the lower arc-shaped clamping groove 6 and the annular clamp 7 are assembled in a clearance fit manner. To avoid rotation of the ring clamp 7 during testing.
As a preferable scheme of the embodiment, the space in the 8-shaped groove 8 can be in clearance fit with the 8-shaped standard test piece. So as to be convenient for installing and fixing the 8-shaped standard test piece.
The specific working process of the utility model is as follows:
step one, an upper connector 14 is used for fixedly connecting an upper pressing rod 3 with a cross beam 2 of a universal material testing machine, a lower connector 15 is used for fixedly connecting a lower pressing rod 4 with a truss 1 of the universal material testing machine, an annular clamp 7 is placed in an upper arc clamping groove 5 and a lower arc clamping groove 6, one of seven upper positioning and mounting holes 9 is aligned with an upper mounting hole 11, one corresponding lower positioning and mounting hole 10 of the seven is aligned with a lower mounting hole 12, the annular clamp 7 is fixedly mounted on the upper pressing rod 3 and the lower pressing rod 4 through the aligned holes by adopting a pin 13 respectively, and the upper and lower relative positions of an upper half 701 of the annular clamp and a lower half 702 of the annular clamp are adjusted.
And step two, placing the standard 8-shaped test piece into the 8-shaped groove 8 of the annular clamp 7, and adjusting the relative position of the standard 8-shaped test piece and the annular clamp 7.
Starting the universal material testing machine, setting parameters, starting the test, enabling the cross beam 2 of the universal material testing machine to slowly ascend until the test piece is destroyed, obtaining the bonding strength of the concrete crack repairing material, taking down the test piece, and carrying out the next group of tests.
And step four, pulling out the pin 13 on the annular clamp 7, rotating the annular clamp 7 in the upper arc clamping groove 5 and the lower arc clamping groove 6, selecting the other upper positioning and mounting hole 9 to be aligned with the upper mounting hole 11, selecting the other corresponding lower positioning and mounting hole 10 to be aligned with the lower mounting hole 12, fixedly mounting the annular clamp 7 on the upper compression rod 3 and the lower compression rod 4 through the aligned holes by adopting the pin 13, and adjusting the upper and lower relative positions of the upper half 701 and the lower half 702 of the annular clamp.
And step five, adopting the same operation as the step two.
Step six, the same operation as step three is adopted.
And seventhly, repeating the test steps, and testing the bonding strength of other angles of the concrete repairing interface.
Claims (7)
1. The multi-angle test fixture for the bonding strength of the concrete crack repairing material comprises a universal material testing machine truss (1), wherein a universal material testing machine cross beam (2) is arranged in the universal material testing machine truss (1), and the multi-angle test fixture is characterized in that the outer end of an upper pressing rod (3) is arranged on the universal material testing machine cross beam (2), and the outer end of a lower pressing rod (4) is arranged at the bottom of the universal material testing machine truss (1); the upper compression bar (3) and the lower compression bar (4) are coaxially arranged;
an upper arc clamping groove (5) is formed in the inner end of the upper pressure rod (3), a lower arc clamping groove (6) is formed in the inner end of the lower pressure rod (4), an annular clamp (7) is clamped between the upper arc clamping groove (5) and the lower arc clamping groove (6), and the installation angles of the annular clamp (7) in the upper arc clamping groove (5) and the lower arc clamping groove (6) can be adjusted at multiple angles along the circumferential direction;
the annular clamp (7) is of a central symmetrical structure and is divided into an upper half part (701) of the annular clamp and a lower half part (702) of the annular clamp, and the upper half part (701) of the annular clamp and the lower half part (702) of the annular clamp are buckled together through a special-shaped buckling surface (703);
the annular clamp (7) is internally provided with an 8-shaped groove (8), and the 8-shaped groove (8) is distributed on the upper half part (701) and the lower half part (702) of the annular clamp in a central symmetry mode.
2. The multi-angle test fixture for the bonding strength of the concrete crack repairing material according to claim 1, wherein a plurality of upper positioning mounting holes (9) are respectively distributed on the upper half part (701) of the annular fixture, and the central axes of the upper positioning mounting holes (9) are vertically arranged on the same equal-diameter circular arc and distributed at equal intervals; a plurality of lower positioning mounting holes (10) are respectively distributed on the lower half part (702) of the annular clamp, and the central axes of the lower positioning mounting holes (10) are vertically arranged on the same equal-diameter circular arc and distributed at equal intervals; the upper positioning mounting holes (9) and the lower positioning mounting holes (10) are in one-to-one correspondence and are arranged in a central symmetry manner.
3. The multi-angle test fixture for the bonding strength of the concrete crack repairing material according to claim 2, wherein a through upper mounting hole (11) is formed in the side wall of the upper arc-shaped clamping groove (5), a through lower mounting hole (12) is formed in the side wall of the lower arc-shaped clamping groove (6), and the upper mounting hole (11) and the upper positioning mounting hole (9) and the lower mounting hole (12) and the lower positioning mounting hole (10) are respectively connected through a pin bolt (13).
4. The multi-angle test fixture for the bonding strength of the concrete crack repairing material according to claim 2, wherein the number of the upper positioning and mounting holes (9) is seven, the distribution range of the central axes of the upper positioning and mounting holes (9) is 0-90 degrees, and the phase difference between the adjacent upper positioning and mounting holes (9) is 15 degrees; the number of the lower positioning and mounting holes (10) is seven, the distribution range of the central axes of the seven lower positioning and mounting holes (10) is 0-90 degrees, and the phase difference between the adjacent lower positioning and mounting holes (10) is 15 degrees.
5. The multi-angle test fixture for the bonding strength of the concrete crack repairing material according to claim 1, wherein the outer end of the upper pressing rod (3) is detachably connected with the cross beam (2) of the universal material testing machine through an upper connector (14); the outer end of the lower pressure rod (4) is detachably connected with the bottom of the truss (1) of the universal material testing machine through a lower connector (15).
6. The multi-angle test fixture for the bonding strength of the concrete crack repairing material according to claim 1, wherein the upper arc clamping groove (5) and the lower arc clamping groove (6) are assembled with the annular fixture (7) in a clearance fit manner.
7. The multi-angle test fixture for the bonding strength of the concrete crack repairing material according to claim 1, wherein the space in the 8-shaped groove (8) can be in clearance fit with an 8-shaped standard test piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320718414.2U CN219890912U (en) | 2023-04-04 | 2023-04-04 | Multi-angle test fixture for bonding strength of concrete crack repair material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320718414.2U CN219890912U (en) | 2023-04-04 | 2023-04-04 | Multi-angle test fixture for bonding strength of concrete crack repair material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219890912U true CN219890912U (en) | 2023-10-24 |
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ID=88403922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320718414.2U Active CN219890912U (en) | 2023-04-04 | 2023-04-04 | Multi-angle test fixture for bonding strength of concrete crack repair material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219890912U (en) |
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2023
- 2023-04-04 CN CN202320718414.2U patent/CN219890912U/en active Active
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