CN217605466U - Tool and device for bending tensile strength test of beam type test piece of pavement base material - Google Patents
Tool and device for bending tensile strength test of beam type test piece of pavement base material Download PDFInfo
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- CN217605466U CN217605466U CN202221428489.9U CN202221428489U CN217605466U CN 217605466 U CN217605466 U CN 217605466U CN 202221428489 U CN202221428489 U CN 202221428489U CN 217605466 U CN217605466 U CN 217605466U
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Abstract
The utility model provides an instrument that is used for road surface basic unit material beam type test piece bending tensile strength to test, its characterized in that: the device comprises a loading mother board, a base and 2 loading beams; a plurality of grooves are transversely distributed on the lower side surface of the loading mother plate, the cross section of each groove is semicircular, and a connecting part used for being connected with a pressure head of a pressurizing machine is arranged in the middle of the upper side surface of the loading mother plate; the base comprises a bottom plate and 2 vertical plates, the 2 vertical plates are all arranged on the upper side surface of the base, the vertical surfaces of the 2 vertical plates are arranged in parallel, the vertical surfaces of the vertical plates are vertical to the upper side surface of the bottom plate, and the upper end surfaces of the vertical plates are parallel to the upper side surface of the bottom plate; the loading beam is a round bar-shaped structural body, and the diameter of the loading beam is matched with that of the groove; the loading motherboard can magnetically attract the loading beam in the groove. Also provided is a test apparatus using the above tool, characterized in that: including the press and the tool described above. Adopt instrument and device, can reduce test cost, improve test efficiency.
Description
Technical Field
The utility model relates to a material performance detects technical field for the road, especially a instrument and device that is used for road surface basic unit material beam type test piece bending tensile strength test.
Background
The strength is a reference index for analyzing the structural damage of a base material of the pavement, and a bending and pulling strength test can better simulate the stress behavior of the pavement structure under the load of a vehicle, so that the bending and pulling strength index of the base is used as a key design parameter of the pavement structure in the existing road asphalt pavement design specification (JTGD 50-2017). The testing regulation of inorganic binder stabilizing materials for highway engineering (JTG E51-2009) describes that the bending tensile strength of the inorganic binder stabilizing materials is tested by a three-point pressurizing method, wherein a pressurizing instrument adopts a press and a universal tester which meet the requirements of a hydraulic pressure tester (GB/T3722) and a universal technical requirement of the tester (GB/T2611) and are provided with a loading rate controller and an indicating device.
Because it is expensive to develop or separately purchase a testing device for flexural tensile strength of a pavement base material, a method of combining a loading mold and a pressurizing instrument as required is generally adopted in the prior art to carry out experiments. Because the sizes of the mixed material grain diameters are different, when the bending tensile strength test of the pavement base material test piece is carried out, test pieces with different sizes need to be prepared according to the sizes of the mixed material grain diameters, the test pieces with each size need to be matched with loading dies with different sizes and specifications for testing, the types of the loading dies are various, the test cost is improved, the dies need to be replaced when the test pieces are replaced at each time, the operation is time-consuming and labor-consuming, and the test efficiency is low.
SUMMERY OF THE UTILITY MODEL
To the problem in the background art, the utility model provides a device that is used for the experimental instrument of road surface base course material beam type test piece bending tensile strength, and utilizes above-mentioned instrument to carry out the experimental device of road surface base course material beam type test piece bending tensile strength to test operation wastes time and energy, inefficiency, problem with high costs among the solution prior art.
The utility model aims at realizing through the technical scheme, it is including:
a tool for a beam type test piece bending and pulling strength test of a pavement base material, which is used for being installed on a pressurizing machine to perform the bending and pulling strength test on the test piece, and is characterized in that: the device comprises a loading mother board, a base and 2 loading beams; a plurality of grooves are transversely distributed on the lower side surface of the loading mother plate, the grooves are axially arranged in parallel, the cross section of each groove is semicircular, and a connecting part for connecting with a pressure head of a pressurizing machine is arranged in the middle of the upper side surface of the loading mother plate; the base comprises a bottom plate and 2 vertical plates, the 2 vertical plates are all arranged on the upper side face of the base, the vertical faces of the 2 vertical plates are arranged in parallel, the vertical faces of the vertical plates are perpendicular to the upper side face of the bottom plate, the upper end faces of the vertical plates are parallel to the upper side face of the bottom plate, and the distance between the 2 vertical plates is larger than the distance between the virtual axial leads of the two grooves with the largest distance; the loading beam is a round bar-shaped structural body, and the diameter of the loading beam is matched with that of the groove; the loading motherboard can magnetically attract the loading beam in the groove.
And as optimization, a leveling bubble for leveling is further arranged on the upper side surface of the loading motherboard.
Preferably, the grooves are distributed in a left-right symmetrical manner with the center of the connecting part as a symmetrical center.
Preferably, the plurality of grooves are uniformly distributed.
Preferably, the groove is a through groove, and the length of the loading beam is greater than that of the groove.
Still provide a device that is used for road surface base material beam type test piece bending tensile strength test, its innovation point lies in: the device comprises a pressurizing machine and a tool for a beam type test piece bending tensile strength test of a pavement base material; the tool is used for being arranged on a pressurizing machine to perform bending and pulling strength test on the test piece; the tool comprises a loading mother board, a base and 2 loading beams; a plurality of grooves are transversely distributed on the lower side surface of the loading mother board, the plurality of grooves are axially arranged in parallel, the cross section of each groove is semicircular, and a connecting part for connecting with a pressure head of a pressurizing machine is arranged in the middle of the upper side surface of the loading mother board; the base comprises a bottom plate and 2 vertical plates, the 2 vertical plates are all arranged on the upper side face of the base, the vertical faces of the 2 vertical plates are arranged in parallel, the vertical faces of the vertical plates are perpendicular to the upper side face of the bottom plate, the upper end faces of the vertical plates are parallel to the upper side face of the bottom plate, and the distance between the 2 vertical plates is larger than the distance between the virtual axial leads of the two grooves with the largest distance; the loading beam is a round bar-shaped structural body, and the diameter of the loading beam is matched with that of the groove; the loading motherboard can magnetically attract the loading beam in the groove; the loading mother board of the tool is connected with a pressure head of the pressurizer through the connecting part, the base is arranged under the loading mother board, the lower side face of the loading mother board is opposite to the upper side face of the base, and the groove is parallel to the vertical face and the upper end face of the vertical plate.
Preferably, the 2 vertical plates are arranged in a left-right symmetrical mode by taking the axis of the pressure head of the pressurizer as a symmetrical center.
Since the technical scheme is used, the utility model discloses following advantage has: as for a plurality of test piece sizes (generally three are a crossbeam, a middle beam and a small beam) required by the test, corresponding dies are not required to be designed respectively, and only 2 loading beams are required to be placed in 2 grooves at corresponding intervals according to the size of the test piece, so that the types of dies are reduced, and the test cost is reduced; meanwhile, the test piece is replaced only by adjusting the distance between the loading beams, so that the operation is simple, time and labor are saved, and the test efficiency is improved; as optimization, the leveling bubble arranged on the loading mother plate can conveniently adjust the levelness of the loading mother plate, and the test precision is improved.
Drawings
The drawings of the present invention are described below.
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic structural diagram of a loading motherboard.
In the figure: 1. loading a mother board; 2. a base; 3. a load beam; 4. a pressurizing machine; 5. a test piece; 11. a groove; 12. a connecting portion; 13. a level bubble; 21. a base plate; 22. a vertical plate; 41. and (4) pressing head.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and examples.
The tool for the beam type test piece bending tensile strength test of the pavement base material as shown in the attached figure 1 comprises a loading mother board 1, a base 2 and 2 loading beams 3; as shown in fig. 2, a plurality of grooves 11 are transversely distributed on the lower side surface of the loading master plate 1, the plurality of grooves 11 are axially arranged in parallel, the cross section of each groove 11 is semicircular, and a connecting part 12 for connecting with a pressing head 41 of a pressing machine 4 is arranged in the middle of the upper side surface of the loading master plate 1; the base 2 comprises a bottom plate 21 and 2 vertical plates 22, wherein the 2 vertical plates 22 are arranged on the upper side surface of the base 2, the vertical surfaces of the 2 vertical plates 22 are arranged in parallel, the vertical surfaces of the vertical plates 22 are vertical to the upper side surface of the bottom plate 21, the upper end surfaces of the vertical plates 22 are parallel to the upper side surface of the bottom plate 21, and the distance between the 2 vertical plates 22 is larger than the distance between the virtual axial leads of the two grooves 11 with the largest distance; the loading beam 3 is a round bar-shaped structure, and the diameter of the loading beam 3 is matched with that of the groove 11; the loading motherboard 1 can magnetically attract the loading beam 3 in the groove.
In order to adjust the levelness of the loading mother plate and improve the test precision, a leveling bubble 13 for leveling is further arranged on the upper side surface of the loading mother plate 1.
In this embodiment, for convenience of adjustment, the plurality of grooves 11 are symmetrically distributed with the center of the connecting portion 12 as a symmetric center, and the plurality of grooves 11 are uniformly distributed. In an actual test, the 2 loading beams can be arranged in a central symmetry mode or an asymmetrical mode of the connecting part, so that a bending tensile strength test of a test piece under the action of asymmetrical load can be carried out, and experimental conditions are provided for indoor theoretical research.
In order to facilitate the taking and placing of the loading beam on the loading motherboard, the groove 11 is a through groove, and the length of the loading beam 3 is greater than that of the groove 11.
The device for the bending and tensile strength test of the beam type test piece of the pavement base material as shown in the attached drawing 1 comprises a pressurizing machine 4 and the tool for the bending and tensile strength test of the beam type test piece of the pavement base material; the loading mother board 1 of the tool is connected with a pressure head 41 of a pressurizer 4 through the connecting part 12, the base 2 is arranged under the loading mother board 1, the lower side surface of the loading mother board 1 is opposite to the upper side surface of the base 2, and the groove 11 is parallel to the vertical surface and the upper end surface of the vertical plate 22.
For the convenience of adjustment, the 2 vertical plates 22 are arranged in left-right symmetry with the axis of the pressing head 41 of the pressing machine 4 as a symmetry center.
During the use, at first place test piece 5 on two risers of base, then according to the size of test piece 5 and experimental requirement place 2 loading roof beams in 2 corresponding recesses of loading mother board the adsorption stability, then start the pressure head of presser and move down until 2 loading roof beams all with the side contact on test piece 5, then according to experimental requirement exert load to test piece 5, acquire the test data.
Claims (7)
1. A tool for a beam test piece bending tensile strength test of a pavement base material, the tool is used for being installed on a pressurizing machine (4) to carry out the bending tensile strength test on the test piece, and the tool is characterized in that: the device comprises a loading mother board (1), a base (2) and 2 loading beams (3); a plurality of grooves (11) are transversely distributed on the lower side surface of the loading mother plate (1), the grooves (11) are axially arranged in parallel, the cross section of each groove (11) is semicircular, and a connecting part (12) for connecting with a pressure head (41) of a pressurizing machine (4) is arranged in the middle of the upper side surface of the loading mother plate (1); the base (2) comprises a bottom plate (21) and 2 vertical plates (22), the 2 vertical plates (22) are all arranged on the upper side face of the base (2), the vertical faces of the 2 vertical plates (22) are arranged in parallel, the vertical faces of the vertical plates (22) are perpendicular to the upper side face of the bottom plate (21), the upper end faces of the vertical plates (22) are parallel to the upper side face of the bottom plate (21), and the distance between the 2 vertical plates (22) is larger than the distance between the virtual axial leads of the two grooves (11) with the largest distance; the loading beam (3) is a round bar-shaped structure, and the diameter of the loading beam (3) is matched with that of the groove (11); the loading mother board (1) can magnetically attract the loading beam (3) in the groove.
2. The tool for the flexural tensile strength test of a beam specimen for a road base material according to claim 1, characterized in that: and a leveling bubble (13) for leveling is also arranged on the upper side surface of the loading motherboard (1).
3. The tool for the beam specimen bending tensile strength test of the pavement base material according to claim 1 or 2, characterized in that: the grooves (11) are symmetrically distributed in the left-right direction by taking the center of the connecting part (12) as a symmetry center.
4. The tool for the beam specimen bending tensile strength test of the pavement base material according to claim 3, characterized in that: the grooves (11) are uniformly distributed.
5. The tool for the beam specimen bending tensile strength test of the pavement base material according to claim 1 or 2, characterized in that: the groove (11) is a through groove, and the length of the loading beam (3) is larger than that of the groove (11).
6. The utility model provides a device that is used for road surface base material beam type test piece bending tensile strength to test which characterized in that: comprising a press (4) and a tool according to claim 1; loading mother board (1) of instrument passes through connecting portion (12) are connected with pressure head (41) of presser (4), base (2) set up under loading mother board (1), the downside of loading mother board (1) is relative with the side of going up of base (2), recess (11) with the facade and the up end of riser (22) are all parallel.
7. The apparatus for the beam specimen bending tensile strength test of the pavement base material according to claim 6, characterized in that: the 2 vertical plates (22) are arranged in a left-right symmetrical mode by taking the axis of the pressure head (41) of the pressurizing machine (4) as a symmetrical center.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221428489.9U CN217605466U (en) | 2022-06-09 | 2022-06-09 | Tool and device for bending tensile strength test of beam type test piece of pavement base material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221428489.9U CN217605466U (en) | 2022-06-09 | 2022-06-09 | Tool and device for bending tensile strength test of beam type test piece of pavement base material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217605466U true CN217605466U (en) | 2022-10-18 |
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ID=83587644
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221428489.9U Active CN217605466U (en) | 2022-06-09 | 2022-06-09 | Tool and device for bending tensile strength test of beam type test piece of pavement base material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217605466U (en) |
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2022
- 2022-06-09 CN CN202221428489.9U patent/CN217605466U/en active Active
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