CN220854429U - Test fixture for tensile modulus of resilience of asphalt mixture - Google Patents
Test fixture for tensile modulus of resilience of asphalt mixture Download PDFInfo
- Publication number
- CN220854429U CN220854429U CN202322269389.7U CN202322269389U CN220854429U CN 220854429 U CN220854429 U CN 220854429U CN 202322269389 U CN202322269389 U CN 202322269389U CN 220854429 U CN220854429 U CN 220854429U
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- connecting hole
- piece
- resilience
- support
- tensile modulus
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- 238000012360 testing method Methods 0.000 title claims abstract description 80
- 239000000203 mixture Substances 0.000 title claims abstract description 74
- 239000010426 asphalt Substances 0.000 title claims abstract description 64
- 239000000523 sample Substances 0.000 claims abstract description 5
- 239000011148 porous material Substances 0.000 claims 1
- 238000000034 method Methods 0.000 description 5
- 238000007906 compression Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model relates to the technical field of asphalt mixture testing tools and discloses a testing fixture for tensile resilience modulus of asphalt mixtures, which comprises a first supporting piece, a second supporting piece, a guide rod and a ranging sensor, wherein the first supporting piece and the second supporting piece are both fixed with an asphalt mixture test piece, the guide rod is arranged in an extending mode along the stretching direction of the asphalt mixture test piece, one end of the guide rod is movably connected with the first supporting piece, the other end of the guide rod is fixed with the second supporting piece, the ranging sensor is fixed with the first supporting piece, a reference plane perpendicular to the extending direction of the guide rod is arranged on the second supporting piece, and a probe of the ranging sensor is opposite to the reference plane. The test fixture for the tensile modulus of resilience of the asphalt mixture can help accurately test the uniaxial tensile modulus of resilience of the asphalt mixture.
Description
Technical Field
The utility model relates to the technical field of asphalt mixture testing tools, in particular to a testing fixture for tensile modulus of resilience of asphalt mixtures.
Background
The rebound modulus of the asphalt mixture is one of important indexes for structural design of asphalt pavement. The test method (T0713-2011) for the uniaxial compression strength of the asphalt mixture is given in the test procedure (JTG E20-2011) for highway engineering asphalt and asphalt mixtures, the test specimen is a cylindrical specimen with the diameter of 100mm and the height of 100mm, the loading rate of 2mm/min and the test temperature of 15 ℃ or 20 ℃.
Asphalt mixture is used as a typical tension-compression opposite material, and the performance difference between the compression direction and the stretching direction is remarkable. However, the current specifications do not give a tensile modulus of elasticity test method for asphalt mixtures, and lack a clamp device for tensile test of asphalt mixtures.
In order to obtain the uniaxial tensile modulus of resilience of the asphalt mixture and comprehensively evaluate the characteristics and the differences of the asphalt mixture in the stretching and compression directions, a set of clamps for testing the tensile modulus of resilience of the asphalt mixture needs to be developed and designed.
Disclosure of utility model
The utility model aims to solve the technical problem of providing a test fixture for tensile modulus of resilience of an asphalt mixture, which is used for helping to accurately test the uniaxial tensile modulus of resilience of the asphalt mixture.
In order to solve the technical problems, the utility model provides a testing fixture for tensile modulus of resilience of asphalt mixture, which comprises a first supporting piece, a second supporting piece, a guide rod and a ranging sensor, wherein the first supporting piece and the second supporting piece are both fixed with an asphalt mixture test piece, the guide rod is arranged in an extending way along the stretching direction of the asphalt mixture test piece, one end of the guide rod is movably connected with the first supporting piece, the other end of the guide rod is fixed with the second supporting piece, the ranging sensor is fixed with the first supporting piece, a reference plane perpendicular to the extending direction of the guide rod is arranged on the second supporting piece, and a probe of the ranging sensor is opposite to the reference plane.
As an improvement of the scheme, a first connecting hole and a second connecting hole are formed in the first supporting piece, the second connecting hole is intersected with the first connecting hole, one end of the guide rod penetrates through the first connecting hole, and a first abutting piece for abutting with the guide rod is arranged in the second connecting hole.
As an improvement of the scheme, a third connecting hole and a fourth connecting hole are formed in the first supporting piece, the third connecting hole is arranged in parallel with the first connecting hole, the fourth connecting hole is intersected with the third connecting hole, the distance measuring sensor penetrates through the third connecting hole, and a second abutting piece for abutting with the distance measuring sensor is arranged in the fourth connecting hole.
As an improvement of the scheme, a fifth connecting hole and a sixth connecting hole are formed in the second supporting piece, the sixth connecting hole intersects with the fifth connecting hole, the other end of the guide rod penetrates through the fifth connecting hole, and a third abutting piece for abutting with the guide rod is arranged in the sixth connecting hole.
As an improvement of the above scheme, a gasket is arranged in the fifth connecting hole.
As an improvement of the above-mentioned aspect, the fifth connecting hole has a smaller aperture than the first connecting hole.
As the improvement of above-mentioned scheme, second support piece includes body and support column, the body with the bituminous mixture test piece is fixed, fifth connecting hole with the sixth connecting hole all sets up on the body, the support column with guide arm parallel arrangement, the reference plane sets up on the support column.
As an improvement of the above scheme, the body is provided with a seventh connecting hole, and the support column is connected with the seventh connecting hole.
As an improvement of the scheme, the first supporting piece is provided with an eighth connecting hole, the body of the second supporting piece is provided with a ninth connecting hole, and the eighth connecting hole and the ninth connecting hole are used for being connected with fastening nails arranged on the side wall of the asphalt mixture test piece.
As an improvement of the above scheme, the first support member, the second support member, the guide rod and the distance measuring sensor are all arranged on the periphery of the asphalt mixture test piece in groups and symmetrically.
The implementation of the utility model has the following beneficial effects:
The utility model discloses a testing fixture for tensile modulus of resilience of an asphalt mixture, which is characterized in that a first supporting piece and a second supporting piece are both fixed on the asphalt mixture test piece, a guide rod is arranged in an extending mode along the stretching direction of the asphalt mixture test piece, one end of the guide rod is fixedly connected with the second supporting piece, the other end of the guide rod is movably connected with the first supporting piece, when the asphalt mixture test piece stretches, the first supporting piece and the second supporting piece are relatively far away or close to each other along with stretching of the asphalt mixture test piece, the guide rod does not influence free movement of the first supporting piece and the second supporting piece, meanwhile, the movement of the first supporting piece and the second supporting piece can be guided, the first supporting piece and the second supporting piece are prevented from deflecting in the stretching process of the asphalt mixture test piece, a distance measuring sensor fixed on the first supporting piece is kept opposite to a datum plane on the second supporting piece, deformation values before and after stretching of the asphalt mixture test piece can be measured, and the deformation values are accurate and reliable;
The uniaxial tensile modulus of resilience of the asphalt mixture test piece can be obtained through the deformation data tested by the test fixture, and the support is provided for mechanical property evaluation of the asphalt mixture and pavement structure design.
Drawings
FIG. 1 is a schematic view of a test fixture for tensile modulus of resilience of asphalt mixtures according to an embodiment of the present utility model;
fig. 2 is a schematic perspective view of a first support;
FIG. 3 is a top view of FIG. 2;
FIG. 4 is a schematic view of the body structure of the second support;
Fig. 5 is a top view of fig. 4.
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.
As shown in fig. 1, the utility model provides an embodiment of a testing fixture for tensile modulus of resilience of asphalt mixture, which comprises a first supporting member 1, a second supporting member 2, a guide rod 3 and a ranging sensor 4, wherein the first supporting member 1 and the second supporting member 2 are both fixed with an asphalt mixture test piece a, the guide rod 3 is arranged in an extending manner along the stretching direction of the asphalt mixture test piece a, one end of the guide rod 3 is movably connected with the first supporting member 1, the other end of the guide rod 3 is fixed with the second supporting member 2, the ranging sensor 4 is fixed with the first supporting member 1, a reference plane 221 perpendicular to the extending direction of the guide rod 3 is arranged on the second supporting member 2, and a probe 41 of the ranging sensor 4 is opposite to the reference plane 221.
The first support piece 1, the second support piece 2 of this embodiment are all fixed on the bituminous mixture test piece a, guide arm 3 extends along the tensile direction of bituminous mixture test piece a and sets up, and the one end and the second support piece 2 fixed connection of guide arm 3, the other end and first support piece 1 swing joint, when bituminous mixture test piece a stretches, first support piece 1, second support piece 2 is kept away from or is close to relatively along with bituminous mixture test piece a flexible, guide arm 3 can not influence the free movement of first support piece 1, second support piece 2, simultaneously can play the guide effect to the removal of first support piece 1, second support piece 2, prevent that first support piece 1, second support piece 2 from off tracking in bituminous mixture test piece a's tensile in-process, make the datum plane 221 on the fixed range finding sensor 4 on the first support piece 1 keep just to face with second support piece 2, ensure that can survey the deformation numerical value before and after bituminous mixture test piece a stretches, and deformation numerical value is accurate, reliable.
The uniaxial tensile resilience modulus of the asphalt mixture test piece A can be obtained through the deformation data tested by the test fixture of the embodiment, and support is provided for mechanical property evaluation of the asphalt mixture and pavement structure design.
The asphalt mixture test piece a in this embodiment is a cylindrical test piece a, and the tensile direction of the cylindrical test piece a is the axial direction.
Preferably, the first supporting member 1, the second supporting member 2, the guide rod 3 and the ranging sensor 4 are all arranged on the periphery of the cylindrical test piece a in groups and symmetrically, and more than two groups of deformation data are measured in different directions of the cylindrical test piece a through each group of ranging sensors 4, so that the testing efficiency can be improved.
Specifically, referring to fig. 2 to 5, fastening nails (not shown in the drawings) are arranged on the side wall of the cylindrical test piece a along the stretching direction, the first support member 1 is provided with an eighth connecting hole 11, the second support member 2 is provided with a ninth connecting hole 211, and the eighth connecting hole 11 and the ninth connecting hole 211 are respectively connected with different fastening nails, so that the first support member 1 and the second support member 2 are both fixed with the asphalt mixture test piece a.
Furthermore, the first support 1 is provided with a first connection hole 12, a second connection hole 13, a third connection hole 14 and a fourth connection hole 15, and the second support 2 is provided with a fifth connection hole 212 and a sixth connection hole 213. Wherein the first connection hole 12 is arranged in parallel with the third connection hole 14, and the second connection hole 13 and the fourth connection hole 15 are arranged in parallel, so that the ranging sensor 4 is assembled in parallel with the guide rod 3. The second connecting hole 13 perpendicularly intersects with the first connecting hole 12, one end of the guide rod 3 penetrates through the first connecting hole 12, and a first abutting piece (not shown in the figure) for abutting against the guide rod 3 is arranged in the second connecting hole 13; the fourth connecting hole 15 perpendicularly intersects with the third connecting hole 14, the ranging sensor 4 penetrates through the third connecting hole 14, and a second abutting piece (not shown in the figure) for abutting against the ranging sensor 4 is disposed in the fourth connecting hole 15. The sixth connecting hole 213 perpendicularly intersects with the fifth connecting hole 212, the other end of the guide rod 3 penetrates through the fifth connecting hole 212, and a third abutting piece (not shown in the figure) for abutting against the guide rod 3 is provided in the sixth connecting hole 213.
Preferably, the first abutment is screwed with the second connection hole 13, the second abutment is screwed with the fourth connection hole 15, and the third abutment is screwed with the sixth connection hole 213. The position of the first abutting piece is adjusted, so that one end of the guide rod 3 is kept in contact with the first abutting piece, the first abutting piece and the first connecting hole 12 are kept in sliding contact with the guide rod 3, the guide rod 3 is positioned and guided, and meanwhile, the first supporting piece 1 and the second supporting piece 2 can be ensured to freely move along the stretching direction in the stretching process of the asphalt mixture test piece A; the other end of the guide rod 3 is clamped and fixed on the second supporting piece 2 by screwing the third abutting piece; by screwing or unscrewing the second abutment, the position of the ranging sensor 4 can be adjusted so that the probe 41 of the ranging sensor 4 is in contact with the reference plane 221 before the start of the test, ensuring that the test is performed within an effective range.
Preferably, the hole diameter of the fifth connecting hole 212 is preferably smaller than that of the first connecting hole 12, so as to reduce the moving space of the guide rod 3 in the second supporting member 2, and better clamp and fix the other end of the guide rod 3 on the second supporting member 2. In addition, in this embodiment, a gasket is disposed in the fifth connecting hole 212, so as to tightly wrap the peripheral outer wall of the guide rod 3, avoid the release of the guide rod 3 and the second support member 2, and ensure that the guide rod 3 plays a role in limiting the vertical deviation of the first support member 1 and the second support member 2 in the loading process of the cylindrical test piece a, so as to ensure the accuracy of collecting the axial deformation value of the cylindrical test piece a.
The second support member 2 of this embodiment specifically includes a body 21 and a support column 22, where the body 21 is fixed to the asphalt mixture test piece a, the fifth connection hole 212 and the sixth connection hole 213 are both disposed on the body 21, a seventh connection hole 214 is further disposed on the body 21, and the support column 22 is connected to the seventh connection hole 214. The support column 22 is arranged parallel to the guide rod 3, and the reference plane 221 is arranged on the support column 22.
When the test fixture of the embodiment is used for testing the axial tensile modulus of resilience of the asphalt mixture test piece A, the installation process of the test fixture and the asphalt mixture test piece A is as follows:
The eighth connecting hole 11 of the first supporting piece 1 and the ninth connecting hole 211 of the second supporting piece 2 are respectively connected with different fastening nails which are arranged on the side wall surface of the asphalt mixture test piece A, and in the process, the first supporting piece 1 and the second supporting piece 2 can be assisted to be positioned and assembled by a guide rod 3 of which the two ends respectively penetrate through the first connecting hole 12 on the first supporting piece 1 and the fifth connecting hole 212 on the second supporting piece 2;
Adjusting the first abutting piece to keep sliding contact with the guide rod 3, and adjusting the third abutting piece to clamp and fix the guide rod 3 on the second supporting piece 2;
Connecting the support column 22 of the second support 2 with the seventh connecting hole 214 of the body 21;
The distance measuring sensor 4 is inserted through the third connecting hole 14 on the first support 1, the distance measuring sensor 4 is contacted with the datum plane 221 on the support column 22, the second abutting piece is adjusted, and the distance measuring sensor 4 is fixed on the first support 1.
Through stretching the asphalt mixture test piece A along the axial direction in one way, the distance measurement sensor 4 can measure the relative displacement of the first support piece 1 and the second support piece 2, namely deformation data of the asphalt mixture test piece A, so that the uniaxial stretching resilience modulus of the asphalt mixture test piece is obtained, and support is provided for mechanical property evaluation of asphalt mixture and pavement structural design.
The above disclosure is only a preferred embodiment of the present utility model, and it is needless to say that the scope of the utility model is not limited thereto, and therefore, the equivalent changes according to the claims of the present utility model still fall within the scope of the present utility model.
Claims (10)
1. A test fixture for bituminous mixture tensile modulus of resilience, its characterized in that includes first support piece, second support piece, guide arm and range finding sensor, first support piece with second support piece is all fixed with the bituminous mixture test piece, the guide arm extends along the tensile direction of bituminous mixture test piece and sets up, the one end of guide arm with first support piece swing joint, the other end with second support piece is fixed, range finding sensor with first support piece is fixed, be equipped with on the second support piece with the perpendicular reference plane of extending direction of guide arm, range finding sensor's probe just right the reference plane.
2. The test fixture for tensile modulus of resilience of asphalt mixture according to claim 1, wherein the first supporting member is provided with a first connecting hole and a second connecting hole, the second connecting hole intersects with the first connecting hole, one end of the guide rod penetrates through the first connecting hole, and a first abutting member for abutting against the guide rod is arranged in the second connecting hole.
3. The test fixture for tensile modulus of resilience of asphalt mixture according to claim 2, wherein a third connecting hole and a fourth connecting hole are provided on the first supporting member, the third connecting hole is arranged in parallel with the first connecting hole, the fourth connecting hole intersects with the third connecting hole, the ranging sensor penetrates through the third connecting hole, and a second abutting member for abutting with the ranging sensor is provided in the fourth connecting hole.
4. The test fixture for tensile modulus of resilience of asphalt mixture according to claim 2, wherein a fifth connecting hole and a sixth connecting hole are provided on the second supporting member, the sixth connecting hole intersects with the fifth connecting hole, the other end of the guide rod penetrates through the fifth connecting hole, and a third abutting member for abutting against the guide rod is provided in the sixth connecting hole.
5. The test fixture for the tensile modulus of resilience of asphalt mixtures according to claim 4, wherein a gasket is provided in said fifth connecting hole.
6. The test fixture for the tensile modulus of resilience of asphalt mixtures according to claim 4 or 5, wherein the fifth connecting hole has a smaller pore diameter than the first connecting hole.
7. The test fixture for the tensile modulus of resilience of a bituminous mixture of claim 4, wherein said second support comprises a body and a support post, said body being fixed to said bituminous mixture test piece, said fifth and sixth connecting holes each being provided on said body, said support post being disposed parallel to said guide bar, said reference plane being provided on said support post.
8. The test fixture for the tensile modulus of resilience of asphalt mixtures according to claim 7, wherein said body is provided with a seventh attachment hole, said support column being connected to said seventh attachment hole.
9. The test fixture for tensile modulus of resilience of asphalt mixture according to claim 7, wherein the first support member is provided with an eighth connection hole, the body of the second support member is provided with a ninth connection hole, and the eighth connection hole and the ninth connection hole are used for being connected with a fastening pin provided on a side wall of the asphalt mixture test piece.
10. The test fixture for the tensile modulus of resilience of asphalt mixtures according to claim 1, wherein the first support, the second support, the guide bar and the ranging sensor are all arranged in groups and symmetrically on the periphery of the asphalt mixture test piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322269389.7U CN220854429U (en) | 2023-08-22 | 2023-08-22 | Test fixture for tensile modulus of resilience of asphalt mixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322269389.7U CN220854429U (en) | 2023-08-22 | 2023-08-22 | Test fixture for tensile modulus of resilience of asphalt mixture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220854429U true CN220854429U (en) | 2024-04-26 |
Family
ID=90744195
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322269389.7U Active CN220854429U (en) | 2023-08-22 | 2023-08-22 | Test fixture for tensile modulus of resilience of asphalt mixture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220854429U (en) |
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2023
- 2023-08-22 CN CN202322269389.7U patent/CN220854429U/en active Active
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