CN212568229U - Asphalt mixture bending test fixture - Google Patents
Asphalt mixture bending test fixture Download PDFInfo
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- CN212568229U CN212568229U CN202021072471.0U CN202021072471U CN212568229U CN 212568229 U CN212568229 U CN 212568229U CN 202021072471 U CN202021072471 U CN 202021072471U CN 212568229 U CN212568229 U CN 212568229U
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- supporting
- cross beam
- displacement sensor
- guide
- asphalt mixture
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Abstract
The utility model discloses an asphalt mixture bending test fixture, which comprises a fixed supporting mechanism and a movable pressure head mechanism; the fixed supporting mechanism comprises a clamp base, two guide rods and a supporting beam; the two guide rods are respectively and vertically arranged on the left side and the right side of the clamp base, the two ends of the supporting cross beam are respectively fixed on the two guide rods and are positioned right above the clamp base, an accommodating space is formed between the supporting cross beam and the clamp base, the upper surfaces of the two ends of the supporting cross beam are respectively provided with a test piece supporting and positioning block, the central position of the supporting cross beam is provided with a displacement sensor, and a measuring head of the displacement sensor upwards extends out of the surface center of the supporting cross beam and is positioned between the two test piece supporting and positioning blocks; the movable pressure head mechanism comprises a guide cross beam and a midspan pressure head. This anchor clamps can stabilize to the test piece and press from both sides tightly, through installing displacement sensor at test piece bottom central authorities, the amount of deflection deformation value of measurement test piece that can be more accurate brings the facility for experimental operation.
Description
Technical Field
The utility model belongs to the technical field of the anchor clamps technique and specifically relates to indicate an asphalt mixture bending test anchor clamps.
Background
The asphalt bending test is used for measuring the mechanical properties of the hot-mix asphalt mixture in bending failure at a specified temperature and loading rate. The test temperature and the loading rate are selected according to relevant regulations and requirements, and if no special regulations exist, the test temperature is 15 +/-0.5 ℃; when the test temperature is used for evaluating the low-temperature tensile property of the asphalt mixture, the test temperature is minus 10 +/-0.5 ℃, and the loading rate is preferably 50 mm/min. Different test temperatures and loading rates should be noted. The asphalt mixture bending test is suitable for the prismatic trabecula which is cut after being formed by wheel milling and has the length of 250mm +/-2. Omm, the width of 30mm +/-2. Omm and the height of 35mm +/-2. Omm, and the span diameter of the prismatic trabecula is 200mm +/-0.5 mm.
At present, in an asphalt mixture bending test, a clamp for fixing a test piece cannot stably position the test piece, and the accuracy of measuring the deflection deformation value of the test piece is low. Therefore, there is a need to develop a solution to the above problems.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model discloses to the disappearance that prior art exists, its main objective provides an asphalt mixture bending test anchor clamps, and it can effectively solve current anchor clamps and can not stabilize the location test piece, measures the lower problem of the precision of the amount of deflection deformation value of test piece.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
an asphalt mixture bending test fixture comprises a fixed supporting mechanism and a movable pressure head mechanism;
the fixed supporting mechanism comprises a clamp base, two guide rods and a supporting beam; the two guide rods are respectively and vertically arranged on the left side and the right side of the clamp base, the two ends of the supporting cross beam are respectively fixed on the two guide rods and are positioned right above the clamp base, an accommodating space is formed between the supporting cross beam and the clamp base, the upper surfaces of the two ends of the supporting cross beam are respectively provided with a test piece supporting and positioning block, the central position of the supporting cross beam is provided with a displacement sensor, and a measuring head of the displacement sensor upwards extends out of the surface center of the supporting cross beam and is positioned between the two test piece supporting and positioning blocks;
the movable pressure head mechanism comprises a guide cross beam and a midspan pressure head; the guide beam is arranged on the guide rod and moves up and down along the guide rod; the midspan pressure head is fixed at the center of the bottom of the guide beam and is positioned right above a measuring head of the displacement sensor.
Preferably, the lower ends of the two guide rods are sleeved with support columns, and two ends of the support beam are respectively sleeved on the two guide rods and abut against the corresponding support columns.
Preferably, the center of the surface of the support beam has a protrusion structure, and the measuring head of the displacement sensor is located in the protrusion structure and can be extended or retracted.
Preferably, the displacement sensor is installed on the supporting beam through an installation seat, the displacement sensor is suspended in the accommodating space, and a fine adjustment nut is arranged between the installation seat and the displacement sensor.
Preferably, both ends of the guide beam are provided with linear bearings, and the linear bearings are sleeved on the corresponding guide rods and are installed in a sliding fit manner.
Preferably, a ball head seat is arranged at the center of the top of the guide beam.
Preferably, the bottom surface of the clamp base is provided with a positioning groove, and the positioning groove is matched and positioned with a positioning pin on the testing machine platform.
Compared with the prior art, the utility model obvious advantage and beneficial effect have, particularly, can know by above-mentioned technical scheme:
this anchor clamps can stabilize to the test piece and press from both sides tightly, through installing displacement sensor at test piece bottom central authorities, the amount of deflection deformation value of measurement test piece that can be more accurate brings the facility for experimental operation.
To more clearly illustrate the structural features and functions of the present invention, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments:
drawings
FIG. 1 is a front view of a preferred embodiment of the present invention;
FIG. 2 is a side view of the preferred embodiment of the present invention;
fig. 3 is a top view of the preferred embodiment of the present invention.
The attached drawings indicate the following:
10. fixed supporting mechanism 11 and clamp base
12. Guide rod 13 and supporting cross beam
14. Test piece supporting and positioning block 15 and supporting upright post
101. Accommodating space 102 and protrusion structure
103. Positioning groove 20 and movable pressure head mechanism
21. Guide beam 22, midspan ram
23. Linear bearing 24, ball seat
30. Displacement sensor 31 and probe
40. Testing machine platform 41 and positioning pin
51. Mounting seat 52 and fine adjustment nut
60. Asphalt mixture trabecula test piece 70 and pressurizing rod
Detailed Description
Referring to fig. 1 to 3, a specific structure of a preferred embodiment of the present invention is shown, which includes a fixed support mechanism 10 and a movable pressing head mechanism 20.
The fixed supporting mechanism 10 comprises a clamp base 11, two guide rods 12 and a supporting beam 13; the two guide rods 12 are respectively vertically arranged on the left side and the right side of the fixture base 11, two ends of the supporting beam 13 are respectively fixed on the two guide rods 12 and located right above the fixture base 11, an accommodating space 101 is formed between the supporting beam 13 and the fixture base 11, the upper surfaces of two ends of the supporting beam 13 are respectively provided with a test piece supporting and positioning block 14, the test piece supporting and positioning block 14 is used for supporting the asphalt mixture trabecula test piece 60, the central position of the supporting beam 13 is provided with a displacement sensor 30, and a measuring head 31 of the displacement sensor 30 upwards extends out of the surface center of the supporting beam 13 and is located between the two test piece supporting and positioning blocks 14. In this embodiment, the lower ends of the two guide rods 12 are both sleeved with a support column 15, and both ends of the support beam 13 are respectively sleeved on the two guide rods 12 and abut against the corresponding support columns 15; the center of the surface of the supporting beam 13 is provided with a protruding structure 102; and, the bottom surface of the clamp base 11 is provided with a positioning groove 103, and the positioning groove 103 is matched and positioned with the positioning pin 41 on the testing machine platform 40, so that the testing machine can be conveniently placed at the central position of the testing machine to ensure the vertical centering.
The movable pressure head mechanism 20 comprises a guide beam 21 and a midspan pressure head 22; the guide beam 21 is installed on the guide rod 12 and moves up and down along the guide rod 12; the midspan ram 22 is fixed to the center of the bottom of the guide beam 21 and is located right above the probe 31 of the displacement sensor 30. In this embodiment, the two ends of the guide beam 21 are provided with linear bearings 23, the linear bearings 23 are sleeved on the corresponding guide rods 12 and are installed in a sliding fit manner, so that the midspan pressing head 22 can be ensured to descend vertically, meanwhile, the semi-cylindrical midspan pressing head 22 is ensured to be perpendicular to the asphalt mixture trabecula test piece 60, the top center of the guide beam 21 is provided with a ball seat 24, and when the pressurizing rod 70 of the semi-circular head is pressurized, the ball seat is matched with the pressurizing rod to automatically adjust the loading center.
In addition, the measuring head 31 of the displacement sensor 30 is positioned in the protruding structure 102 and can be extended or retracted, so that the displacement sensor 30 can be protected from being damaged by the collapse of the asphalt mixture trabecular test piece 60 during fracture, moreover, the displacement sensor 30 is mounted on the supporting beam 13 through the mounting seat 51, the displacement sensor 30 is suspended in the accommodating space 101, and the fine tuning nut 52 is arranged between the mounting seat 51 and the displacement sensor 30.
Detailed description the working principle of the present embodiment is as follows:
during testing, the guide cross beam 21 is installed on the two guide rods 12 of the fixed supporting mechanism 10, then the whole fixture is installed on a testing machine platform, the guide cross beam 21 is lifted, the constant-temperature asphalt mixture trabecula test piece 60 is placed on the test piece supporting and positioning block 14, the positioning block is arranged on the test piece supporting and positioning block 14, the asphalt mixture trabecula test piece 60 is placed close to the positioning block, the two ends of the asphalt mixture trabecula test piece 60 are determined to be uniform in position, the middle-span pressure head 22 is placed on the upper portion of the asphalt mixture trabecula test piece 60 through the lower guide cross beam 21, the stroke of the displacement sensor 30 is adjusted, and the effective stroke of. And starting the testing machine to adjust the loading speed, enabling the pressurizing rod 70 to descend at the speed of 50mm/min and pressurize the ball seat 24 on the guide cross beam 21, transmitting the load to the asphalt mixture trabecula test piece 60 through the guide cross beam 21 and the midspan pressure head 22, simultaneously measuring the loaded load and midspan deflection deformation, stopping pressurizing when the trabecula bends to reach the maximum failure load, simultaneously recording a midspan deflection deformation value corresponding to the maximum failure load, and performing corresponding data analysis and calculation.
The utility model discloses a design key is: this anchor clamps can stabilize to the test piece and press from both sides tightly, through installing displacement sensor at test piece bottom central authorities, the amount of deflection deformation value of measurement test piece that can be more accurate brings the facility for experimental operation.
The technical principle of the present invention is described above with reference to specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without any inventive effort, which would fall within the scope of the present invention.
Claims (7)
1. The utility model provides an asphalt mixture bending test anchor clamps which characterized in that: comprises a fixed supporting mechanism and a movable pressure head mechanism;
the fixed supporting mechanism comprises a clamp base, two guide rods and a supporting beam; the two guide rods are respectively and vertically arranged on the left side and the right side of the clamp base, the two ends of the supporting cross beam are respectively fixed on the two guide rods and are positioned right above the clamp base, an accommodating space is formed between the supporting cross beam and the clamp base, the upper surfaces of the two ends of the supporting cross beam are respectively provided with a test piece supporting and positioning block, the central position of the supporting cross beam is provided with a displacement sensor, and a measuring head of the displacement sensor upwards extends out of the surface center of the supporting cross beam and is positioned between the two test piece supporting and positioning blocks;
the movable pressure head mechanism comprises a guide cross beam and a midspan pressure head; the guide beam is arranged on the guide rod and moves up and down along the guide rod; the midspan pressure head is fixed at the center of the bottom of the guide beam and is positioned right above a measuring head of the displacement sensor.
2. The asphalt mixture bending test fixture of claim 1, wherein: the lower ends of the two guide rods are sleeved with support upright posts, and the two ends of the support cross beam are respectively sleeved on the two guide rods and abut against the corresponding support upright posts.
3. The asphalt mixture bending test fixture of claim 1, wherein: the center of the surface of the supporting beam is provided with a protruding structure, and a measuring head of the displacement sensor is positioned in the protruding structure and can be extended or retracted.
4. The asphalt mixture bending test fixture of claim 1, wherein: the displacement sensor is installed on the supporting beam through the installation seat, the displacement sensor is suspended in the accommodating space, and a fine adjustment nut is arranged between the installation seat and the displacement sensor.
5. The asphalt mixture bending test fixture of claim 1, wherein: and linear bearings are arranged at two ends of the guide cross beam and sleeved on the corresponding guide rods in a sliding fit manner.
6. The asphalt mixture bending test fixture of claim 1, wherein: and a ball head seat is arranged at the center of the top of the guide beam.
7. The asphalt mixture bending test fixture of claim 1, wherein: the bottom surface of the clamp base is provided with a positioning groove, and the positioning groove is matched and positioned with a positioning pin on the testing machine platform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021072471.0U CN212568229U (en) | 2020-06-11 | 2020-06-11 | Asphalt mixture bending test fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021072471.0U CN212568229U (en) | 2020-06-11 | 2020-06-11 | Asphalt mixture bending test fixture |
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| Publication Number | Publication Date |
|---|---|
| CN212568229U true CN212568229U (en) | 2021-02-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021072471.0U Active CN212568229U (en) | 2020-06-11 | 2020-06-11 | Asphalt mixture bending test fixture |
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| CN (1) | CN212568229U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113533025A (en) * | 2021-07-22 | 2021-10-22 | 燕山大学 | Loading device for durability test of concrete member and measuring method thereof |
-
2020
- 2020-06-11 CN CN202021072471.0U patent/CN212568229U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113533025A (en) * | 2021-07-22 | 2021-10-22 | 燕山大学 | Loading device for durability test of concrete member and measuring method thereof |
| CN113533025B (en) * | 2021-07-22 | 2022-12-20 | 燕山大学 | Loading device for durability test of concrete member and measuring method thereof |
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