CN220508647U - Test structure and test device for tensile strength and ultimate failure strain of asphalt mixture - Google Patents
Test structure and test device for tensile strength and ultimate failure strain of asphalt mixture Download PDFInfo
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- CN220508647U CN220508647U CN202322039761.5U CN202322039761U CN220508647U CN 220508647 U CN220508647 U CN 220508647U CN 202322039761 U CN202322039761 U CN 202322039761U CN 220508647 U CN220508647 U CN 220508647U
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- thread section
- tensile strength
- asphalt mixture
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- 238000012360 testing method Methods 0.000 title claims abstract description 61
- 239000010426 asphalt Substances 0.000 title claims abstract description 31
- 239000000203 mixture Substances 0.000 title claims abstract description 30
- 238000009434 installation Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 230000006378 damage Effects 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000009864 tensile test Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 230000008093 supporting effect Effects 0.000 description 1
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model discloses a testing structure and a testing device for tensile strength and ultimate failure strain of an asphalt mixture, wherein the testing structure for tensile strength and ultimate failure strain of the asphalt mixture comprises a bearing seat, a connecting piece, a first stop ring, a second stop ring and a double-head sleeve; the connecting piece is provided with a first thread section, a second thread section and a third thread section which are sequentially connected, the diameter of the second thread section is larger than that of the first thread section and that of the third thread section, the first thread section is in threaded connection with the bearing seat, and the third thread section is in threaded connection with the double-head sleeve; the first stop ring and the second stop ring are sleeved on the second threaded section, the first stop ring moves forward along the second threaded section and is abutted to the bearing seat, and the second stop ring moves reversely along the second threaded section and is abutted to the double-head sleeve. The utility model has the advantages of accurate test and simple installation.
Description
Technical Field
The utility model relates to the technical field of civil engineering experiments, in particular to a test structure and a test device for tensile strength and ultimate failure strain of an asphalt mixture.
Background
As typical tensile-compressive opposite materials, the asphalt mixture has remarkable difference in performance in compression and tension directions, so that the strength and the destruction strain of the asphalt mixture are one of basic performance indexes for evaluating the performance of the asphalt mixture; in addition, a single-axis compression strength test method (T0713-2011) of the asphalt mixture is given in the Highway engineering asphalt and asphalt mixture test procedure (JTG E20-2011), the test specimen is a cylindrical specimen with the diameter of 100mm and the height of 100mm, the loading rate is 2mm/min, and the test temperature is 15 ℃ or 20 ℃. The strain corresponding to the intensity peak is taken as the destructive strain.
In order to obtain test data, a currently common method is to use an axial tensile test instrument connected with a loading device to perform a tensile test and a limit damage strain test on a piece to be tested. In addition, in order to ensure the accuracy of the test data, the axis of the to-be-tested piece and the axial alignment of the test instrument need to be ensured in the installation and test processes.
However, the relative displacement of each part in the current testing instrument always easily occurs in the testing process, so that the eccentric stress problem is caused, the data error is caused, even the sensor on the piece to be tested is damaged, the testing accuracy is difficult to ensure, and the testing cost is also improved.
Further, there are some test instruments to ensure the accuracy of the test, and an excessively complex fixing structure is used to achieve the collinear effect, however, such a structural arrangement results in a complex installation procedure, which is disadvantageous for improving the test efficiency.
Disclosure of Invention
The utility model aims to solve the technical problems of providing a testing structure and a testing device for tensile strength and ultimate failure strain of an asphalt mixture, which are accurate in testing and simple and convenient to install.
In order to solve the technical problems, the utility model provides a testing structure for tensile strength and ultimate failure strain of an asphalt mixture, which comprises a bearing seat, a connecting piece, a first stop ring, a second stop ring and a double-head sleeve;
the connecting piece is provided with a first thread section, a second thread section and a third thread section which are sequentially connected, the diameter of the second thread section is larger than that of the first thread section and that of the third thread section, the first thread section is in threaded connection with the bearing seat, and the third thread section is in threaded connection with the double-head sleeve;
the first stop ring and the second stop ring are sleeved on the second threaded section, the first stop ring moves forward along the second threaded section and is abutted to the bearing seat, and the second stop ring moves reversely along the second threaded section and is abutted to the double-head sleeve.
Preferably, the first stop ring is provided with a first contact surface, the first contact surface is abutted against the end face of the bearing seat, and the area of the first contact surface is 1/4-1/6 of the area of the end face of the bearing seat.
Preferably, the second stop ring is provided with a second contact surface, the second contact surface is abutted with the end face of the double-head sleeve, and the area of the second contact surface is larger than that of the end face of the double-head sleeve.
Preferably, the first contact surface, the second contact surface, the end surface of the bearing seat and the end surface of the double-ended sleeve are all planar structures.
Preferably, the first stop ring is provided with first convenient holding grooves which are arranged at intervals along the circumferential direction of the first stop ring, and the second stop ring is provided with second convenient holding grooves which are arranged at intervals along the circumferential direction of the second stop ring.
Preferably, the connector further comprises a bolt, the connector is provided with a connecting hole, the double-head sleeve is provided with a first mounting hole, and the bolt penetrates through the connecting hole and the first mounting hole.
Preferably, the double-head sleeve is further provided with a second mounting hole, the second mounting hole is separated from the first mounting hole by a preset distance, and the loading device is connected with the second mounting hole through another bolt.
Preferably, the bearing seat is provided with a first fixing hole positioned on the axis, the double-head sleeve is provided with a second fixing hole positioned on the axis, the first thread section penetrates through the first fixing hole, and the third thread section penetrates through the second fixing hole.
Correspondingly, the utility model provides a testing device which comprises the testing structure for the tensile strength and the ultimate breaking strain of the asphalt mixture.
Preferably, the asphalt mixture testing device further comprises a piece to be tested, wherein the testing structures of tensile strength and limit damage strain of the asphalt mixture are symmetrically arranged on the upper side and the lower side of the piece to be tested, and the piece to be tested is connected with a strain sensor.
The implementation of the utility model has the following beneficial effects:
the connecting piece is provided with the first thread section, the second thread section and the third thread section which are sequentially connected with each other, wherein the first thread section is in threaded connection with the bearing seat, and the third thread section is in threaded connection with the double-head sleeve, so that the axis of the bearing seat is in axial collineation with each part, the to-be-tested piece arranged on the bearing seat is ensured to be in axial collineation with each part, and the testing accuracy is ensured;
the diameter of the second thread section is larger than that of the first thread section and that of the third thread section, so that the positioning and blocking effects on the bearing seat and the double-head sleeve are achieved, and relative displacement among all parts in the test process is prevented.
Further, the first stop ring and the second stop ring are both sleeved on the second thread section, the first stop ring moves forward along the second thread section and is abutted against the bearing seat, the second stop ring moves reversely along the second thread section and is abutted against the double-head sleeve, so that the first stop ring and the second stop ring are in threaded connection with the second thread section and move forward and reversely along the second thread section respectively, up-and-down locking is realized, further fixing effect is achieved, the tensile force direction of each part is ensured to be always in a straight line with the axis of a piece to be tested in the testing process, testing accuracy is further ensured, and the problem of eccentric stress is avoided.
And each part is assembled in a threaded connection mode, so that the installation convenience is guaranteed, and the testing efficiency is further improved.
Drawings
FIG. 1 is a block diagram of a test structure of tensile strength and ultimate strain-to-failure of an asphalt mixture according to the present utility model;
FIG. 2 is a cross-sectional view of a test structure of tensile strength and ultimate strain-to-failure of an asphalt mixture of the present utility model.
Detailed Description
The present utility model will be described in further detail with reference to the accompanying drawings, for the purpose of making the objects, technical solutions and advantages of the present utility model more apparent. It is only stated that the terms of orientation such as up, down, left, right, front, back, inner, outer, etc. used in this document or the imminent present utility model, are used only with reference to the drawings of the present utility model, and are not meant to be limiting in any way.
Referring to fig. 1 and 2, an embodiment of the present utility model provides a testing structure for tensile strength and ultimate breaking strain of an asphalt mixture, which includes a bearing seat 1, a connecting piece 2, a first stop ring 3, a second stop ring 4 and a double-ended sleeve 5;
according to the utility model, the connecting piece 2 is provided with the first thread section 21, the second thread section 22 and the third thread section 23 which are sequentially connected with each other, wherein the first thread section 21 is in threaded connection with the bearing seat 1, and the third thread section 23 is in threaded connection with the double-head sleeve 5, so that the axis of the bearing seat 1 is in alignment with the axial direction of each part, and further, the to-be-tested piece arranged on the bearing seat 1 can be in alignment with the axial direction of each part, and the testing accuracy is ensured;
the diameter of the second thread section 22 is larger than the diameter of the first thread section 21 and the diameter of the third thread section 23, so as to play a role in positioning and blocking the bearing seat 1 and the double-head sleeve 5 and prevent relative displacement between the parts in the test process.
Further, the first stop ring 3 and the second stop ring 4 are both sleeved on the second threaded section 22, and the first stop ring 3 moves forward along the second threaded section 22 and is abutted against the bearing seat 1, and the second stop ring 4 moves reversely along the second threaded section 22 and is abutted against the double-ended sleeve 5, so that the first stop ring 3 and the second stop ring 4 are in threaded connection with the second threaded section 22 and move forward and backward along the second threaded section 22 respectively, the up-and-down locking is realized, the further fixing effect is achieved, the testing accuracy is further ensured, and the eccentric stress problem is avoided.
And each part is assembled in a threaded connection mode, so that the installation convenience is guaranteed, and the testing efficiency is further improved.
Furthermore, in order to further prevent the relative displacement between the components in the test process, the first stop ring 3 is provided with a first contact surface 31, the first contact surface 31 is abutted against the end surface of the bearing seat 1, and the area of the first contact surface 31 is 1/4-1/6 of the area of the end surface of the bearing seat 1, so as to ensure sufficient contact, and further locking effect is achieved by improving friction force, so that the components are prevented from being slightly displaced in the loading process as much as possible.
Correspondingly, the second stop ring 4 is provided with a second contact surface 41, the second contact surface 41 is abutted against the end surface of the double-ended sleeve 5, and the area of the second contact surface 41 is larger than that of the end surface of the double-ended sleeve 5, so that further locking effect is realized by improving friction force.
Preferably, the first contact surface 31, the second contact surface 41, the end surface of the bearing seat 1 and the end surface of the double-ended sleeve 5 are all planar structures, so as to further ensure sufficient contact.
More preferably, in order to facilitate the user to adjust the positions of the first stop ring 3 and the second stop ring 4, the first stop ring 3 is provided with first holding grooves 32, and the first holding grooves 32 are arranged at intervals along the circumferential direction of the first stop ring 3, so that the user can hold and twist the first stop ring 3, and the first stop ring 3 moves along the second thread section 22 and abuts against the end surface of the bearing seat 1.
Correspondingly, the second stop ring 4 is provided with second holding grooves 42, and the second holding grooves 42 are arranged at intervals along the circumferential direction of the second stop ring 4.
On the other hand, in order to ensure the connection stability, referring to fig. 1 and 2 again, the connector 2 is provided with a connection hole 231, the double-ended sleeve 5 is provided with a first mounting hole 51, and the connection hole 231 and the first mounting hole 51 are penetrated by the pin 6.
It should be noted that, in order to implement the function of applying the tensile force, the present utility model further includes a loading device, where the double-ended sleeve 5 is provided with a second mounting hole 52, the second mounting hole 52 is spaced from the first mounting hole 51 by a preset distance, and the loading device is connected to the second mounting hole 52 through another plug 6.
Preferably, in order to make the axis of the bearing seat 1 and the axial direction of each component collinear, the bearing seat 1 is provided with a first fixing hole 11 located on the axis, the double-head sleeve 5 is provided with a second fixing hole 53 located on the axis, the first thread section 21 penetrates through the first fixing hole 11, and the third thread section 23 penetrates through the second fixing hole 53, so as to realize threaded connection.
The second fixing hole 53 is located at one end of the double-ended sleeve 5, and the second mounting hole 52 is located near the other end of the double-ended sleeve 5. And, the other end of the double-ended sleeve 5 may be fixed to a member such as a stationary pedestal, a stationary bracket, etc., to secure a supporting effect.
In addition, the utility model provides a testing device which comprises the testing structure for the tensile strength and the ultimate breaking strain of the asphalt mixture.
Preferably, in order to accurately obtain the tensile strength of the to-be-tested piece, the test structures of the tensile strength and the limit damage strain of the asphalt mixture are symmetrically arranged on the upper side and the lower side of the to-be-tested piece, and are symmetrically arranged, and the tensile force is applied through the loading equipment, so that the deviation of the test result is avoided.
More preferably, the to-be-measured piece is connected with a strain sensor, strain data are collected, and the tensile limit failure strain is recorded.
While the foregoing is directed to the preferred embodiments of the present utility model, it will be appreciated by those skilled in the art that changes and modifications may be made without departing from the principles of the utility model, such changes and modifications are also intended to be within the scope of the utility model.
Claims (10)
1. The test structure of the tensile strength and the ultimate failure strain of the asphalt mixture is characterized by comprising a bearing seat, a connecting piece, a first stop ring, a second stop ring and a double-head sleeve;
the connecting piece is provided with a first thread section, a second thread section and a third thread section which are sequentially connected, the diameter of the second thread section is larger than that of the first thread section and that of the third thread section, the first thread section is in threaded connection with the bearing seat, and the third thread section is in threaded connection with the double-head sleeve;
the first stop ring and the second stop ring are sleeved on the second threaded section, the first stop ring moves forward along the second threaded section and is abutted to the bearing seat, and the second stop ring moves reversely along the second threaded section and is abutted to the double-head sleeve.
2. The asphalt mixture tensile strength and ultimate breaking strain testing structure according to claim 1, wherein the first stop ring is provided with a first contact surface, the first contact surface is abutted against the end face of the bearing seat, and the area of the first contact surface is 1/4-1/6 of the area of the end face of the bearing seat.
3. The asphalt mixture tensile strength and ultimate failure strain testing structure according to claim 2, wherein the second stopper ring is provided with a second contact surface, the second contact surface is abutted against the end face of the double-ended sleeve, and the area of the second contact surface is larger than the area of the end face of the double-ended sleeve.
4. The asphalt mixture tensile strength and ultimate strain at failure test structure of claim 3, wherein said first contact surface, said second contact surface, said end surface of said carrier, and said end surface of said double-ended sleeve are all planar structures.
5. The asphalt mixture tensile strength and ultimate breaking strain testing structure according to claim 1, wherein the first stopper ring is provided with first holding grooves arranged at intervals along the circumferential direction of the first stopper ring, and the second stopper ring is provided with second holding grooves arranged at intervals along the circumferential direction of the second stopper ring.
6. The asphalt mixture tensile strength and ultimate failure strain testing structure according to claim 1, further comprising a plug pin, wherein the connecting member is provided with a connecting hole, wherein the double-ended sleeve is provided with a first mounting hole, and wherein the plug pin penetrates through the connecting hole and the first mounting hole.
7. The asphalt mixture tensile strength and ultimate strain at failure test structure of claim 6, further comprising a loading device, said double-ended sleeve being provided with a second mounting hole spaced a predetermined distance from said first mounting hole, said loading device being connected to said second mounting hole by another said pin.
8. The asphalt mixture tensile strength and ultimate failure strain testing structure according to claim 1, wherein the bearing seat is provided with a first fixing hole on an axis, the double-ended sleeve is provided with a second fixing hole on the axis, the first thread section penetrates through the first fixing hole, and the third thread section penetrates through the second fixing hole.
9. A test device comprising a test structure of tensile strength and ultimate strain-to-failure of an asphalt mixture according to any one of claims 1-8.
10. The testing device of claim 9, further comprising a member to be tested, wherein the testing structures for tensile strength and ultimate breaking strain of the asphalt mixture are symmetrically arranged on the upper side and the lower side of the member to be tested, and strain sensors are connected to the member to be tested.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322039761.5U CN220508647U (en) | 2023-07-31 | 2023-07-31 | Test structure and test device for tensile strength and ultimate failure strain of asphalt mixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322039761.5U CN220508647U (en) | 2023-07-31 | 2023-07-31 | Test structure and test device for tensile strength and ultimate failure strain of asphalt mixture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220508647U true CN220508647U (en) | 2024-02-20 |
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ID=89864878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322039761.5U Active CN220508647U (en) | 2023-07-31 | 2023-07-31 | Test structure and test device for tensile strength and ultimate failure strain of asphalt mixture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220508647U (en) |
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2023
- 2023-07-31 CN CN202322039761.5U patent/CN220508647U/en active Active
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