CN210221726U - Asphalt mixture trabecula bending test fixture - Google Patents
Asphalt mixture trabecula bending test fixture Download PDFInfo
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- CN210221726U CN210221726U CN201920889066.9U CN201920889066U CN210221726U CN 210221726 U CN210221726 U CN 210221726U CN 201920889066 U CN201920889066 U CN 201920889066U CN 210221726 U CN210221726 U CN 210221726U
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- asphalt mixture
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Abstract
The utility model discloses an asphalt mixture trabecula bending test anchor clamps, including base and vertical guide pillar, the sub-unit connection base of vertical guide pillar, the upper portion of vertical guide pillar is equipped with transverse guide and first position control assembly, is equipped with second position control assembly and at least one loading effect layering on the transverse guide, is equipped with third position control assembly and two strutting arrangement that are used for supporting the asphalt mixture test piece on the base. The utility model has the function of converting the load action points by changing the number of the load action battens, and can be simultaneously suitable for a three-point trabecula bending test and a four-point trabecula bending test; the load action pressing strip and the supporting device are arranged to be movable, the vertical guide columns are added, and the requirements of the small beam bending test of the asphalt mixture with different lengths, widths and heights are met.
Description
Technical Field
The utility model relates to a civil engineering traffic materials tests check out test set technical field, especially relates to a bituminous mixture trabecula bending test anchor clamps.
Background
At present, three-point trabecula bending tests and four-point bending tests are mainly performed on the asphalt mixture trabecula bending tests, and the tests can evaluate indexes such as bending strength, dynamic modulus, bending fatigue performance and the like of an asphalt mixture trabecula test piece in a bending stress state.
The test clamp for the bending stress state of the asphalt mixture trabecula in the prior art is provided with a three-point trabecula bending test clamp and a four-point trabecula bending clamp. Fig. 1 is a schematic diagram showing a stress state of a three-point trabecula bending test, wherein the three-point bending state of the asphalt mixture trabecula is formed by two supporting points at the bottom of a clamp and an upper load point. As shown in fig. 2, a stress state diagram of a four-point trabecular bending test is shown, and the four-point bending state of the asphalt mixture trabecular is formed by two supporting points at the bottom of the clamp and two upper load points. In the existing disclosed product, the three-point trabecular bending test fixture and the four-point trabecular bending test fixture are independent, and the other test fixture meeting the stress requirement needs to be replaced every time one test is carried out, so that the test efficiency is reduced. Meanwhile, in the prior art, no matter the three-point trabecula bending test fixture or the four-point trabecula bending test fixture, the bottom supporting point is fixed, so that the size of the asphalt mixture test piece is limited, and the bending performance of the asphalt mixture test pieces with different sizes is difficult to comprehensively evaluate.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a bituminous mixture trabecula bending test anchor clamps of convertible load action point can be applicable to three point trabecula bending test and four point trabecula bending test simultaneously, and test efficiency is high, sets the strong point movable and increases vertical guide pillar, has satisfied not unidimensional bituminous mixture trabecula bending test's demand, has solved the problem that single test is equipped with a test anchor clamps among the prior art and can not test the bending property of unidimensional bituminous mixture test piece.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the clamp for the bending test of the bituminous mixture trabecula comprises a base and a vertical guide pillar, wherein the lower part of the vertical guide pillar is connected with the base, the upper part of the vertical guide pillar is provided with a transverse guide rail and a first position adjusting assembly, and the first position adjusting assembly is used for adjusting the height of the transverse guide rail along the vertical guide pillar in an up-and-down moving manner; the transverse guide rail is provided with a second position adjusting assembly and at least one load acting pressing strip, and the second position adjusting assembly is used for horizontally moving the load acting pressing strip along the transverse guide rail to adjust the position; the base is provided with a third position adjusting assembly and two supporting devices for supporting the asphalt mixture test piece, and the third position adjusting assembly is used for adjusting the horizontal position of the supporting devices.
Furthermore, a groove for guiding and positioning the supporting device is arranged on the base.
Further, the surface of the transverse guide rail and the edge of the groove are provided with scales. The position of the load acting pressing strip on the transverse guide rail and the position of the supporting device in the groove can be accurately adjusted by referring to the scale.
Furthermore, the bottom of the load action layering is provided with a first bulge for transmitting load action force, and the top of the supporting device is provided with a second bulge for transmitting supporting action force. The first bulge is arranged, so that the load action pressing strip can be conveniently aligned to the load action point of the upper surface mark of the asphalt mixture test piece; set up the second arch, be convenient for aim at the support action point of bituminous mixture test piece lower surface sign with strutting arrangement.
Further, the first position adjusting assembly comprises a vertical guide pillar bolt and a fixing block, the fixing block is welded on the transverse guide rail, a through hole for the vertical guide pillar to pass through is formed in the fixing block, a first threaded hole is formed in the side wall of the through hole, and one end of the vertical guide pillar bolt penetrates through the first threaded hole and then abuts against the vertical guide pillar. The transverse guide rail is fixedly connected with the vertical guide pillar through a fixing block and a vertical guide pillar bolt. When the vertical guide pillar bolt is loosened, the transverse guide rail can freely move up and down along the vertical guide pillar to adjust the height, so that the test requirements of asphalt mixture test pieces with different heights are met. When the asphalt mixture test piece is placed for a trabecular bending test, the vertical guide pillar bolt needs to be locked to keep the stability of the whole test fixture.
Furthermore, the second position adjusting assembly comprises a pressing strip fixing bolt, a second threaded hole is formed in the load acting pressing strip, and one end of the pressing strip fixing bolt penetrates through the second threaded hole and then abuts against the transverse guide rail. The load action layering is sleeved in the transverse guide rail and is locked and fixed with the transverse guide rail through a layering fixing bolt. When the fixing bolt of the pressing strip is loosened, the horizontal position of the load action pressing strip can be adjusted by moving the load action pressing strip left and right along the transverse guide rail, so that the test requirements of asphalt mixture test pieces with different lengths can be met.
Further, the third position adjustment subassembly includes that the screw-thread steel is rectangular and four strutting arrangement nuts, every strutting arrangement all is equipped with the round hole, be equipped with the third screw hole on the base, the rectangular one end threaded connection of screw-thread steel the third screw hole, the rectangular other end of screw-thread steel passes two in proper order round hole on the strutting arrangement, every strutting arrangement's both sides respectively be equipped with one with the rectangular threaded connection of screw-thread steel the strutting arrangement nut. The supporting device is matched with the deformed steel bar through a supporting device nut and locked and fixed in the groove. When the supporting device nuts on the two sides of the supporting device are loosened, the supporting device can move left and right along the groove to adjust the horizontal position, so that the test requirements of asphalt mixture test pieces with different lengths are met.
Furthermore, the vertical guide posts are cylindrical and four in number. Four cylindrical vertical guide posts are adopted, so that the height of the transverse guide rail can be adjusted more stably and smoothly by moving up and down.
Further, the number of the load acting pressing strips is two. Two load action pressing strips are sleeved on the transverse guide rail, and a four-point trabecula bending test can be carried out; when a three-point trabecula bending test is needed, only any one of the load action pressing strips needs to be detached, and the load action points can be flexibly converted on the same set of test fixture, so that one set of fixture can have two stress states, and the functionality of the test fixture is improved.
Compared with the prior art, the utility model provides an asphalt mixture trabecula bending test anchor clamps possesses following beneficial effect: the utility model has the function of converting the load action points by changing the number of the load action pressing strips, can be simultaneously suitable for a three-point trabecula bending test and a four-point trabecula bending test, and has high test efficiency; set load effect layering and strutting arrangement to movable and increase vertical guide pillar, satisfied different length wide high size bituminous mixture trabecula bending test's demand, solved among the prior art single test be equipped with a test fixture with can not experimental not the problem of the bending property of unidimensional bituminous mixture test piece.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
FIG. 1 is a three-point trabecular bending test stress state diagram;
FIG. 2 is a diagram of the stress state of a four-point trabecular bending test;
FIG. 3 is a schematic structural view of the present invention;
fig. 4 is a schematic top view of the present invention;
fig. 5 is a left side view schematic structure diagram of the present invention;
FIG. 6 is a schematic sectional view taken along line A-A of FIG. 3;
FIG. 7 is a schematic view of the four-point trabecular bending test loading position of the present invention;
fig. 8 is a loading position schematic diagram of the three-point trabecula bending test of the utility model.
Reference numerals: 1. a base; 11. a groove; 12. a third threaded hole; 2. a vertical guide post; 3. a first position adjustment assembly; 31. a vertical guide post bolt; 32. a fixed block; 4. a transverse guide rail; 5. a second position adjustment assembly; 51. a batten fixing bolt; 6. pressing strips under the action of load; 61. a first protrusion; 62. a load application point; 7. a third position adjustment assembly; 71. a deformed steel bar; 72. a support device nut; 8. a support device; 81. a second protrusion; 82. a support action point; 83. a circular hole; 9. an asphalt mixture test piece; 10. and (4) a scale.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 3 to 8, an embodiment of the present invention is shown in a bending test fixture for an asphalt mixture trabecula. In order to meet different test requirements, such as different requirements of a bending strength test, a bending fatigue test, a dynamic modulus and the like on the length, the width and the height of an asphalt mixture test piece, an asphalt mixture trabecula bending test fixture comprises a base 1 and four cylindrical vertical guide pillars 2, the lower part of each vertical guide pillar 2 is connected with the base 1, the upper part of each vertical guide pillar 2 is provided with a transverse guide rail 4 and a first position adjusting assembly 3, and the first position adjusting assembly 3 is used for adjusting the height of the transverse guide rail 4 by moving up and down along the vertical guide pillars 2; the transverse guide rail 4 is provided with a second position adjusting component 5 and at least one load acting pressing strip 6, and the second position adjusting component 5 is used for horizontally moving the load acting pressing strip 6 along the transverse guide rail 4 to adjust the position; the base 1 is provided with a third position adjusting component 7 and two supporting devices 8 for supporting the asphalt mixture test piece 9, and the third position adjusting component 7 is used for adjusting the horizontal positions of the supporting devices 8. The base 1 is provided with a groove 11 for guiding the positioning and supporting device 8. The vertical guide post 2 is used for providing a space for the transverse guide rail 4 to freely move up and down, and the height of the transverse guide rail 4 is adjusted by loosening or locking the first position adjusting assembly 3 so as to meet the test requirements of asphalt mixture test pieces with different heights; the transverse guide rail 4 is used for providing a space for the load action pressing strip 6 to move left and right transversely, and the horizontal position of the load action pressing strip 6 is adjusted by loosening or locking the second position adjusting assembly 5 so as to meet the test requirements of asphalt mixture test pieces with different length sizes; the groove 11 is used for providing a space for the supporting device 8 to move left and right transversely and has a guiding and positioning effect, and the horizontal position of the supporting device 8 is adjusted by loosening or locking the third position adjusting assembly 7 so as to meet the test requirements of asphalt mixture test pieces with different lengths. When a three-point trabecula bending test is required, a load action pressing strip 6 is sleeved and mounted on the transverse guide rail 4; when a four-point trabecula bending test is required, two load acting pressing strips 6 are sleeved on the transverse guide rail 4. One set of test fixture can provide two test conditions to meet the switching of a three-point trabecula bending test or a four-point trabecula bending test, and the test efficiency is greatly improved.
Wherein, first position control subassembly 3 includes vertical guide pillar bolt 31 and fixed block 32, and fixed block 32 welds on transverse guide 4, and fixed block 32 is equipped with the through-hole that supplies vertical guide pillar 2 to pass, and the lateral wall of through-hole is equipped with first screw hole, and vertical guide pillar 2 is supported to propping up behind the first screw hole to the one end of vertical guide pillar bolt 31. The transverse guide rail 4 is fixedly connected with the vertical guide pillar 2 through a fixing block 32 and a vertical guide pillar bolt 31. When the vertical guide pillar bolt 31 is loosened, the transverse guide rail 4 can freely move up and down along the vertical guide pillar 2 to adjust the height, so that the test requirements of the asphalt mixture test pieces 9 with different heights can be met. When the asphalt mixture test piece 9 is put into the test fixture for the trabecular bending test, the vertical guide pillar bolt 31 needs to be locked to keep the stability of the whole test fixture.
The second position adjusting assembly 5 comprises a pressing strip fixing bolt 51, a second threaded hole is formed in the load acting pressing strip 6, and one end of the pressing strip fixing bolt 51 penetrates through the second threaded hole and then abuts against the transverse guide rail 4. The load action layering 6 is sleeved in the transverse guide rail 4 and is locked and fixed with the transverse guide rail 4 through a layering fixing bolt 51. When the fixing bolt 51 of the pressing strip is loosened, the horizontal position of the load acting pressing strip 6 can be adjusted by moving left and right along the transverse guide rail 4, so that the test requirements of asphalt mixture test pieces 9 with different lengths can be met.
The third position adjusting assembly 7 comprises a deformed steel bar strip 71 and four supporting device nuts 72, each supporting device 8 is provided with a round hole 83, the base 1 is provided with a third threaded hole 12, one end of the deformed steel bar strip 71 is in threaded connection with the third threaded hole 12, the other end of the deformed steel bar strip 71 sequentially penetrates through the round holes 83 in the two supporting devices 8, and two sides of each supporting device 8 are respectively provided with one supporting device nut 72 in threaded connection with the deformed steel bar strip 71. The supporting device 8 is locked and fixed in the groove 11 through the matching of a supporting device nut 72 and a thread steel strip 71. When the supporting device nuts 72 on the two sides of the supporting device 8 are loosened, the supporting device 8 can move left and right along the groove 11 to adjust the horizontal position, so that the test requirements of the asphalt mixture test pieces 9 with different lengths are met.
The number of the load application beads 6 is two. Referring to fig. 7, two load acting pressing strips 6 are sleeved on the transverse guide rail 4, so that a four-point trabecular bending test can be performed; referring to fig. 8, when a three-point trabecular bending test is required, any one of the load acting beads 6 is detached. The load action points can be flexibly converted on the same set of test fixture, so that one set of test fixture can have two stress states, and the functionality of the test fixture is improved.
In other modified embodiments, further, the bottom of the load acting compression bar 6 is provided with a first protrusion 61 for transmitting load acting force, and the top of the supporting device 8 is provided with a second protrusion 81 for transmitting supporting acting force. The first bulge 61 is arranged, so that the load action layering 6 can be conveniently aligned to the load action point 62 marked on the upper surface of the asphalt mixture test piece 9; the second protrusion 81 is arranged to facilitate aligning the supporting device 8 with the supporting action point 82 of the lower surface mark of the asphalt mixture test piece 9.
In other improved embodiments, further, the surface of the cross rail 4 and the edge of the groove 11 are provided with the scale 10. The distance position of the scale 10 is referenced in order to accurately adjust the position of the load-bearing bead 6 on the transverse rail 4 and the position of the support means 8 in the groove 11.
The utility model discloses an operation description as follows:
(1) measuring the length, width and height of the asphalt mixture test piece 9, and marking the positions of the supporting action points 82 and the load action points 62 on the asphalt mixture test piece 9 (two supporting action points 82 and one load action point 62 are marked in a three-point trabecular bending test, two supporting action points 82 and two load action points 62 are marked in a four-point trabecular bending test) so as to adjust the positions of the load action pressing strip 6 and the supporting device 8;
(2) calculating the distance of the load action pressing strip 6 and the supporting device 8 which need to move according to the positions of the load action point 62 and the supporting action point 82 marked on the asphalt mixture test piece 9, moving the load action pressing strip 6 along the transverse guide rail 4 and moving the supporting device 8 along the groove 11 according to the scale display of the scale 10, enabling the supporting device 8 and the load action pressing strip 6 to correspondingly move to the proper positions of the asphalt mixture test piece 9 respectively, screwing the pressing strip fixing bolt 51 to fix the load action pressing strip 6 on the transverse guide rail 4, and enabling the threaded steel strip 71 to be screwed into the third threaded hole 12 and locking the supporting device nut 72 to fix the supporting device 8;
(3) moving the transverse guide rail 4 upwards along the vertical guide post 2 to vacate a position for placing the asphalt mixture test piece 9 into the test fixture;
(4) placing the asphalt mixture test piece 9 on the supporting device 8 according to the position of the supporting action point 82 marked on the asphalt mixture test piece 9, and finely adjusting the position of the supporting device 8 to enable the second bulge 81 to be aligned with the supporting action point 82 marked on the asphalt mixture test piece 9;
(5) moving the transverse guide rail 4 downwards along the vertical guide pillar 2, after the load action pressing strip 6 is close to the asphalt mixture test piece 9, finely adjusting the position of the load action pressing strip 6 to enable the first bulge 61 to be aligned with a load action point 62 (the placement position of the asphalt mixture test piece in a four-point trabecular bending test is shown in figure 7, and the placement position of the asphalt mixture test piece in a three-point trabecular bending test is shown in figure 8), and then, moving the transverse guide rail 4 downwards along the vertical guide pillar 2, screwing and locking the vertical guide pillar bolt 31 to enable the transverse guide rail 4 to be fastened with the vertical guide pillar 2;
(6) the trabecular bending test fixture with the asphalt mixture test piece 9 is placed on a loading test machine to apply load to carry out bending test tests (the loading position of the four-point trabecular bending test is shown in figure 7, and the loading position of the three-point trabecular bending test is shown in figure 8).
Compared with the prior art, the utility model provides a following beneficial effect: the utility model has the function of converting load action points by changing the number of the load action pressing strips, can be simultaneously suitable for a three-point trabecula bending test and a four-point trabecula bending test, and improves the test efficiency; set load effect layering and strutting arrangement to movable and increase vertical guide pillar, satisfied different length wide high size bituminous mixture trabecula bending test's demand, solved among the prior art single test be equipped with a test fixture with can not experimental not the problem of the bending property of unidimensional bituminous mixture test piece.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The utility model provides an asphalt mixture trabecula bending test anchor clamps, includes base and vertical guide pillar, the sub-unit connection of vertical guide pillar the base, its characterized in that: the upper part of the vertical guide post is provided with a transverse guide rail and a first position adjusting assembly, and the first position adjusting assembly is used for adjusting the height of the transverse guide rail along the vertical guide post in a vertical moving mode; the transverse guide rail is provided with a second position adjusting assembly and at least one load acting pressing strip, and the second position adjusting assembly is used for horizontally moving the load acting pressing strip along the transverse guide rail to adjust the position; the base is provided with a third position adjusting assembly and two supporting devices for supporting the asphalt mixture test piece, and the third position adjusting assembly is used for adjusting the horizontal position of the supporting devices.
2. The bituminous mixture trabecular bending test fixture of claim 1, characterized in that: the base is provided with a groove for guiding and positioning the supporting device.
3. The bituminous mixture trabecular bending test fixture of claim 2, characterized in that: and scales are arranged on the surfaces of the transverse guide rails and the edges of the grooves.
4. The bituminous mixture trabecular bending test fixture of claim 1, characterized in that: the bottom of load action layering is equipped with the first arch that is used for transmitting load effort, strutting arrangement's top is equipped with the second arch that is used for transmitting the support effort.
5. The bituminous mixture trabecular bending test fixture of claim 1, characterized in that: the first position adjusting assembly comprises a vertical guide pillar bolt and a fixing block, the fixing block is welded on the transverse guide rail, the fixing block is provided with a through hole for the vertical guide pillar to pass through, the side wall of the through hole is provided with a first threaded hole, and one end of the vertical guide pillar bolt penetrates through the first threaded hole and then abuts against the vertical guide pillar.
6. The bituminous mixture trabecular bending test fixture of claim 1, characterized in that: the second position adjusting assembly comprises a pressing strip fixing bolt, a second threaded hole is formed in the load acting pressing strip, and one end of the pressing strip fixing bolt penetrates through the second threaded hole and then abuts against the transverse guide rail.
7. The bituminous mixture trabecular bending test fixture of claim 1, characterized in that: third position adjusting part includes rectangular and four strutting arrangement nuts of screw-thread steel, every strutting arrangement all is equipped with the round hole, be equipped with the third screw hole on the base, the rectangular one end threaded connection of screw-thread steel the third screw hole, the rectangular other end of screw-thread steel passes two in proper order round hole on the strutting arrangement, every strutting arrangement's both sides respectively be equipped with one with the rectangular threaded connection of screw-thread steel strutting arrangement nut.
8. The clamp for the bending test of the bituminous mixture trabeculae as claimed in any one of claims 1-7, wherein: the vertical guide posts are cylindrical and four in number.
9. The bituminous mixture trabecular bending test fixture of claim 8, characterized in that: the number of the load acting pressing strips is two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920889066.9U CN210221726U (en) | 2019-06-13 | 2019-06-13 | Asphalt mixture trabecula bending test fixture |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920889066.9U CN210221726U (en) | 2019-06-13 | 2019-06-13 | Asphalt mixture trabecula bending test fixture |
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| Publication Number | Publication Date |
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| CN210221726U true CN210221726U (en) | 2020-03-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920889066.9U Active CN210221726U (en) | 2019-06-13 | 2019-06-13 | Asphalt mixture trabecula bending test fixture |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111579361A (en) * | 2020-06-16 | 2020-08-25 | 天津大学 | Test fixture and method for three-point bending and four-point bending of rock |
| CN113008696A (en) * | 2021-03-25 | 2021-06-22 | 蚌埠市思创沥青路面工程有限公司 | Asphalt pavement low-temperature cracking resistance performance test system |
| CN113295509A (en) * | 2021-05-14 | 2021-08-24 | 五邑大学 | Be applied to bending test's integral type anchor clamps |
| CN113340741A (en) * | 2021-06-04 | 2021-09-03 | 山东方圆建筑材料有限公司 | Test platform and test method |
| CN113418773A (en) * | 2021-06-08 | 2021-09-21 | 北京航空航天大学 | Structure-load-transmission integrated composite material four-point bending clamp and use method |
| CN113959852A (en) * | 2021-10-20 | 2022-01-21 | 中铁十四局集团第一工程发展有限公司 | Hydraulic fracturing expansion failure device and test method for jointed rock mass |
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2019
- 2019-06-13 CN CN201920889066.9U patent/CN210221726U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111579361A (en) * | 2020-06-16 | 2020-08-25 | 天津大学 | Test fixture and method for three-point bending and four-point bending of rock |
| CN113008696A (en) * | 2021-03-25 | 2021-06-22 | 蚌埠市思创沥青路面工程有限公司 | Asphalt pavement low-temperature cracking resistance performance test system |
| CN113008696B (en) * | 2021-03-25 | 2024-05-17 | 蚌埠市思创沥青路面工程有限公司 | Asphalt pavement low-temperature cracking resistance test system |
| CN113295509A (en) * | 2021-05-14 | 2021-08-24 | 五邑大学 | Be applied to bending test's integral type anchor clamps |
| CN113340741A (en) * | 2021-06-04 | 2021-09-03 | 山东方圆建筑材料有限公司 | Test platform and test method |
| CN113418773A (en) * | 2021-06-08 | 2021-09-21 | 北京航空航天大学 | Structure-load-transmission integrated composite material four-point bending clamp and use method |
| CN113959852A (en) * | 2021-10-20 | 2022-01-21 | 中铁十四局集团第一工程发展有限公司 | Hydraulic fracturing expansion failure device and test method for jointed rock mass |
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