CN203869955U - Multi-axis loading test device for asphalt mixture cylinder body test piece - Google Patents
Multi-axis loading test device for asphalt mixture cylinder body test piece Download PDFInfo
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- CN203869955U CN203869955U CN201420211203.0U CN201420211203U CN203869955U CN 203869955 U CN203869955 U CN 203869955U CN 201420211203 U CN201420211203 U CN 201420211203U CN 203869955 U CN203869955 U CN 203869955U
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Abstract
The utility model discloses a multi-axis loading test device for an asphalt mixture cylinder body test piece. The test device comprises a horizontal shaft, a horizontal loading plate, a horizontal guide rod, a horizontal loading oil cylinder, a rubber tire, a hydraulic motor, a vertical loading device and a rack, wherein one end of the horizontal shaft is connected onto a first end plate of the rack through a bearing; the other end of the horizontal shaft is connected onto the horizontal loading plate through a bearing; the asphalt mixture cylinder body test piece is fixed on the horizontal shaft; the horizontal loading plate is mounted on the horizontal guide rod fixed on the rack in a sliding manner; the horizontal loading plate can be loaded by the horizontal loading oil cylinder; the rubber tire is arranged above the horizontal shaft; the asphalt mixture cylinder body test piece is driven by the hydraulic motor and pushed through frictional force to rotate along with the horizontal shaft; the vertical loading device is arranged above the rubber tire; so that load on the rubber tire in the vertical direction can be realized. According to the multi-axis loading test device for the asphalt mixture cylinder body test piece, multi-axis stress state of practical pavement materials can be well simulated, so that the test piece can bear interaction effects of compression, stretching and shearing.
Description
Technical field
The utility model relates to the technical field of test pavement material mechanical property, refers in particular to a kind of asphalt right cylinder test specimen multiaxis load testing machine.
Background technology
The test method of " highway engineering pitch and Asphalt Mixture Experiment code " (JTG E20-2011) Asphalt Mixture of latest edition mainly comprises at present: uniaxial compression, uniaxial tension, little beam deflection and diametral compression test etc.In process of the test, bitumen mixture specimen is in single shaft or biaxial stress state.And in actual bituminous pavement, asphalt, in multiaxis stress, bears the reciprocation of compression, stretching, shearing.Therefore, the test unit of existing asphalt and method cannot be simulated the multiaxis stress of actual asphalt pavement material.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art and shortcoming, a kind of asphalt right cylinder test specimen multiaxis load testing machine is provided, the acting force of energy simulating wheel load to actual ground surface material, make test specimen in multiaxis stress, bear the reciprocation of compression, stretching, shearing.
For achieving the above object, technical scheme provided by the utility model is: a kind of asphalt right cylinder test specimen multiaxis load testing machine, include transverse axis, horizontal load plate, horizontal guide, horizontal load cylinder, rubber tyre, oil motor, vertical charger and frame, wherein, one end of described transverse axis is bound up on by bearing on the first end plate of frame, its other end is bound up in horizontal load plate by bearing, free to rotate; Described asphalt right cylinder test specimen is fixed on transverse axis, and can rotate with transverse axis, and the axis of its axis and transverse axis is in same direction; Described horizontal load plate is slidably mounted in the horizontal guide being fixed in frame, can do horizontal motion along horizontal guide, and can be loaded it by horizontal load cylinder, make it apply horizontal direction to the asphalt right cylinder test specimen on transverse axis and stretch or compression load; The axis of described horizontal guide and the axis of transverse axis are in same direction; Described rubber tyre is arranged on the top of transverse axis, and the outside surface of the asphalt right cylinder test specimen on can exposure level axle, promotes asphalt right cylinder test specimen by fluid motor-driven by friction force and rotate with transverse axis; Described vertical charger is arranged on the top of rubber tyre, can apply vertical load to described rubber tyre, thereby realize, the asphalt right cylinder test specimen on transverse axis is applied to vertical load.
Described frame includes the first end plate, the second end plate, the 3rd end plate, top board, base plate, wherein, described the first end plate, the second end plate, the 3rd end plate vertical display, and on the axis direction of transverse axis spaced apart successively; Between described the first end plate and the second end plate, be connected with top board and base plate, and be combined to form an accommodation space, described transverse axis, rubber tyre, oil motor are placed in respectively in this accommodation space, and one end of described transverse axis is bound up on the first end plate by bearing, its other end is bound up in vertical horizontal load plate by bearing through after the second end plate; The bottom of described vertical charger applies vertical load through top board to rubber tyre; Between described the second end plate and the 3rd end plate, be connected with upper and lower opposed horizontal guide, described horizontal load plate is slidably mounted in this upper and lower opposed horizontal guide, and by the multiple horizontal load cylinder being fixed on the second end plate and the 3rd end plate, it is loaded.
The diameter D of described asphalt right cylinder test specimen is 100mm～200mm, and its length L is 1.0～4.0 times of diameter D.
The diameter of described rubber tyre is 0.5～4 times of asphalt right cylinder test specimen diameter, and tire pressure is 0.5～1.5MPa, and tread width is 5～50mm.
The two ends of described asphalt right cylinder test specimen are fixed on transverse axis by anchor ear respectively.
Described rubber tyre is the rubber tyre of inflation.
The two ends of described horizontal load plate are by adopting Horizontal limiting sleeve pipe to be slidably mounted in upper and lower opposed horizontal guide, can do horizontal motion in horizontal guide.
The Horizontal limiting sleeve pipe passing for transverse axis is installed on described the second end plate; The vertical limit casing passing for vertical charger bottom is installed on described top board.
Compared with prior art, tool has the following advantages and beneficial effect the utility model:
1, the test unit of existing asphalt and method cannot be simulated the multiaxis stress of actual asphalt pavement material, and asphalt right cylinder test specimen multiaxis load testing machine and method that the utility model provides, can simulate well actual ground surface material multiaxis stress, make test specimen bear the reciprocation of compression, stretching, shearing;
2, existing test unit and method cannot be simulated vehicle tyre road pavement applied pressure and the friction force simultaneously of certain air pressure, and the utility model adopts the rubber tyre of inflation to load at test specimen rotating middle part, exert pressure and friction force simultaneously, the more approaching wheel load that acts on actual road surface.
Brief description of the drawings
Fig. 1 is the structural representation of described asphalt right cylinder test specimen multiaxis load testing machine.
Fig. 2 is one of stressed schematic diagram of described asphalt right cylinder test specimen.
Fig. 3 be described asphalt right cylinder test specimen stressed schematic diagram two.
Embodiment
Below in conjunction with specific embodiment, the utility model is described in further detail.
Embodiment 1
As shown in Figure 1, asphalt right cylinder test specimen multiaxis load testing machine described in the present embodiment, include transverse axis 1, horizontal load plate 2, horizontal guide 3, horizontal load cylinder 4, rubber tyre 5, oil motor 6, vertical charger 7 and frame, wherein, one end of described transverse axis 1 is bound up on by bearing on the first end plate 8 of frame, its other end is bound up in horizontal load plate 2 by bearing, free to rotate; The two ends of described asphalt right cylinder test specimen 16 are fixed on transverse axis 1 by anchor ear 15 respectively, and can rotate with transverse axis 1, and the axis of its axis and transverse axis 1, in same direction, is horizontal; Described horizontal load plate 2 is slidably mounted in the horizontal guide 3 being fixed in frame, can do horizontal motion along horizontal guide 3, and can be loaded it by horizontal load cylinder 4, make it apply horizontal direction to the asphalt right cylinder test specimen on transverse axis 1 and stretch or compression load; The axis of the axis of described horizontal guide 3 and transverse axis 1 is in same direction; The rubber tyre that described rubber tyre 5 is inflation, its correspondence is arranged on the top of transverse axis 1, the outside surface at asphalt right cylinder test specimen 16 middle parts on can exposure level axle 1, is driven and is promoted asphalt right cylinder test specimen 16 by friction force and rotate with transverse axis 1 by oil motor 6; Described vertical charger 7 correspondences are arranged on the top of rubber tyre 5, can apply vertical load P to described rubber tyre 5, thereby realize, the asphalt right cylinder test specimen on transverse axis 1 are applied to vertical load P.
Described frame includes the first end plate 8, the second end plate 9, the 3rd end plate 10, top board 11, base plate 12, wherein, described the first end plate 8, the second end plate 9, the 3rd end plate 10 vertical displays, and on the axis direction of transverse axis 1 spaced apart successively; Between described the first end plate 8 and the second end plate 9, be connected with top board 11 and base plate 12, described the first end plate 8, the second end plate 9, top board 11, base plate 12 have been combined to form an accommodation space, described transverse axis 1, rubber tyre 5, oil motor 6 are placed in respectively in this accommodation space, and one end of described transverse axis 1 is bound up on the first end plate 8 by bearing, its other end is bound up in vertical horizontal load plate 2 by bearing through after the second end plate 9, and the Horizontal limiting sleeve pipe 13 passing for transverse axis 1 is installed on described the second end plate 9; The bottom of described vertical charger 7 is through the rotating shaft 17 of the rear contact rubber tyre 5 of top board 11, can be by this rotating shaft 17 be applied to vertical load, and then realization applies vertical load to rubber tyre 5, on described top board 11, the vertical limit casing 14 passing for vertical charger 7 bottoms is installed, to guarantee that vertical charger 7 moves in vertical simultaneously; Between described the second end plate 9 and the 3rd end plate 10, be connected with upper and lower opposed horizontal guide 3, the two ends of described horizontal load plate 2 are by adopting Horizontal limiting sleeve pipe 13 to be slidably mounted in upper and lower opposed horizontal guide 3, can in horizontal guide 16, do horizontal motion to guarantee horizontal load plate 2, described horizontal load plate 2 is loaded it by each two the horizontal load cylinders 4 that are fixed on the second end plate 9 and the 3rd end plate 10 simultaneously, realizes the asphalt right cylinder test specimen 16 on transverse axis 1 is applied to horizontal direction stretching or compression load.
The diameter D of described asphalt right cylinder test specimen can be for 100mm～200mm (being specially in the present embodiment 100mm), and its length L can be 1.0～4.0 times of diameter D (in the present embodiment its length L be D 1.0 times).
The diameter of described rubber tyre 5 can be 0.5～4 times (being in the present embodiment 0.5 times) of asphalt right cylinder test specimen diameter, tire pressure is 0.5～1.5MPa (being specially in the present embodiment 0.5MPa), and tread width is 5～50mm (being specially in the present embodiment 5mm).
Described asphalt right cylinder test specimen can adopt compacting process, static pressure method or gyratory compaction method to make; Or adopt the right cylinder test specimen drilling through in the plate-like test specimen of making in rolling method; Or employing drills through cylindrical core in road surface.And be specifically to adopt gyratory compaction method to be made in the present embodiment.
As shown in Figures 2 and 3, described rubber tyre 5 drives asphalt right cylinder test specimen 16 to rotate, described asphalt right cylinder test specimen 16 is subject to the skin-friction force of rubber tyre 5 and the pressure P effect of vertical, meanwhile, asphalt right cylinder examination 16 is subject to horizontal direction compression or tensile load Q effect; Described rubber tyre 5 is exerted pressure the rotating shaft 17 of P, transverse axis 1, rubber tyre 5 all in same plane to asphalt right cylinder test specimen 16.Wherein, the rotating shaft 17 of rubber tyre 5 is parallel with transverse axis 1; Pressure P is perpendicular to transverse axis 1.
Be below the test method of asphalt right cylinder test specimen multiaxis load testing machine described in the present embodiment, its concrete condition is as follows:
1) measure maximum tension or the compression load that asphalt right cylinder test specimen can bear, test temperature is 0 DEG C～30 DEG C (being specially in the present embodiment 0 DEG C), adopt the asphalt right cylinder test specimen with multiaxis load test same diameter and length, measure its maximum tension that can bear and compression load M, wherein, maximum tension load is 38kN, and maximum compression load is 97kN.
2) asphalt right cylinder test specimen 16 is installed on transverse axis 1, adopt and step 1) identical test temperature, the environment temperature of testing laboratory is controlled within the scope of test temperature ± 0.1 DEG C, before loading, temperature retention time is 90min～120min (being specially in the present embodiment 90min).
3) by horizontal load cylinder 4, horizontal load plate 2 is loaded, thereby asphalt right cylinder test specimen 16 is applied by transverse axis 1, horizontal direction stretches or compression load Q (specifically applying horizontal direction at the present embodiment stretches), 0.1～0.8 times (being specially in the present embodiment 0.1 times) that the value of Q is M.
4) on rubber tyre 5, apply vertical load P by vertical charger 7, thereby make the vertical load P applying can act on the medium position of asphalt right cylinder test specimen 16,0.1～0.7 times (being specially in the present embodiment 0.1 times) that the value of P is Q.
5) primer fluid pressure motor 6, makes rubber tyre 5 with transverse axis 1 single direction rotation, and rotating speed is 1r/s～100r/s (being specially in the present embodiment 1r/s).
6) when asphalt right cylinder test specimen 16 rotates after 10000 number of turns, measure the diameter of described asphalt right cylinder test specimen middle part loading position, calculated diameter rate of change, and after loading, the change percentage in arid computing formula of test specimen middle part diameter is: test specimen diameter before the diameter/loading of loading position test specimen after 100% × loading preset times; Simultaneously, measure described asphalt right cylinder test specimen length, the rate of change of test specimen length after calculating loads, and after loading, test specimen length variations percent computing formula is: test specimen length before test specimen length/loading after 100% × loading preset times, test findings is as seen the following form as shown in the of 1.
Embodiment 2
Described in the present embodiment, the diameter D of asphalt right cylinder test specimen is 200mm as different from Example 1, its length L is D 4.0 times.The diameter of described rubber tyre 5 is 4 times of asphalt right cylinder test specimen diameter, and tire pressure is 1.5MPa, and tread width is 50mm.Described asphalt right cylinder test specimen adopts the right cylinder test specimen drilling through in the plate-like test specimen of making in rolling method.
The test method of asphalt right cylinder test specimen multiaxis load testing machine described in the present embodiment, its concrete condition is as follows:
1) measure maximum tension or the compression load that asphalt right cylinder test specimen can bear, test temperature is 30 DEG C, adopt the asphalt right cylinder test specimen with multiaxis load test same diameter and length, measure its maximum tension that can bear and compression load M, wherein, maximum tension load is 521N; Maximum compression load is 1654N.
2) asphalt right cylinder test specimen 16 is installed on transverse axis 1, is adopted and step 1) identical test temperature, the environment temperature of testing laboratory is controlled within the scope of test temperature ± 0.1 DEG C, before loading, temperature retention time is 120min.
3) by horizontal load cylinder 4, horizontal load plate 2 is loaded, thereby by transverse axis 1, asphalt right cylinder test specimen 16 is applied to horizontal direction tensile load Q, the value of Q is M 0.8 times.
4) on rubber tyre 5, apply vertical load P by vertical charger 7, thereby make the vertical load P applying can act on the medium position of asphalt right cylinder test specimen 16, the value of P is Q 0.7 times.
5) primer fluid pressure motor 6, makes rubber tyre 5 with transverse axis 1 single direction rotation, and rotating speed is 100r/s.
6) when asphalt right cylinder test specimen 16 rotates after 5000 number of turns, measure the diameter of described asphalt right cylinder test specimen middle part loading position, calculated diameter rate of change, and after loading, the change percentage in arid computing formula of test specimen middle part diameter is: test specimen diameter before the diameter/loading of loading position test specimen after 100% × loading preset times; Simultaneously, measure described asphalt right cylinder test specimen length, the rate of change of test specimen length after calculating loads, and after loading, test specimen length variations percent computing formula is: test specimen length before test specimen length/loading after 100% × loading preset times, test findings is as seen the following form as shown in the of 1.
Embodiment 3
Described in the present embodiment, the diameter D of asphalt right cylinder test specimen is 100mm as different from Example 1, its length L is D 4.0 times.The diameter of described rubber tyre 5 is 0.5 times of asphalt right cylinder test specimen diameter, and tire pressure is 1.5MPa, and tread width is 5mm.Described asphalt right cylinder test specimen adopts and in road surface, drills through cylindrical core.
The test method of asphalt right cylinder test specimen multiaxis load testing machine described in the present embodiment, its concrete condition is as follows:
1) measure maximum tension or the compression load that asphalt right cylinder test specimen can bear, test temperature is 30 DEG C, the asphalt right cylinder test specimen of employing and multiaxis load test same diameter and length, measures its maximum tension that can bear and compression load M.
2) asphalt right cylinder test specimen 16 is installed on transverse axis 1, is adopted and step 1) identical test temperature, the environment temperature of testing laboratory is controlled within the scope of test temperature ± 0.1 DEG C, before loading, temperature retention time is 90min.
3) by horizontal load cylinder 4, horizontal load plate 2 is loaded, thereby by transverse axis 1, asphalt right cylinder test specimen 16 is applied to horizontal direction tensile load Q, the value of Q is M 0.1 times.
4) on rubber tyre 5, apply vertical load P by vertical charger 7, thereby make the vertical load P applying can act on the medium position of asphalt right cylinder test specimen 16, the value of P is Q 0.7 times.
5) primer fluid pressure motor 6, makes rubber tyre 5 with transverse axis 1 single direction rotation, and rotating speed is 1r/s.
6) when asphalt right cylinder test specimen 16 rotates after 2000 number of turns, measure the diameter of described asphalt right cylinder test specimen middle part loading position, calculated diameter rate of change, and after loading, the change percentage in arid computing formula of test specimen middle part diameter is: test specimen diameter before the diameter/loading of loading position test specimen after 100% × loading preset times; Simultaneously, measure described asphalt right cylinder test specimen length, the rate of change of test specimen length after calculating loads, and after loading, test specimen length variations percent computing formula is: test specimen length before test specimen length/loading after 100% × loading preset times, test findings is as seen the following form as shown in the of 1.
The test findings of the each embodiment of table 1-
The above embodiment is only the preferred embodiment of the utility model, not limits practical range of the present utility model with this, therefore the variation that all shapes according to the utility model, principle are done all should be encompassed in protection domain of the present utility model.
Claims (8)
1. an asphalt right cylinder test specimen multiaxis load testing machine, it is characterized in that: include transverse axis (1), horizontal load plate (2), horizontal guide (3), horizontal load cylinder (4), rubber tyre (5), oil motor (6), vertical charger (7) and frame, wherein, one end of described transverse axis (1) is bound up on by bearing on first end plate (8) of frame, it is upper, free to rotate that its other end is bound up on horizontal load plate (2) by bearing; It is upper that described asphalt right cylinder test specimen is fixed on transverse axis (1), and can rotate with transverse axis (1), and the axis of its axis and transverse axis (1) is in same direction; Described horizontal load plate (2) is slidably mounted in the horizontal guide (3) being fixed in frame, can do horizontal motion along horizontal guide (3), and can be loaded it by horizontal load cylinder (4), make it apply horizontal direction to the asphalt right cylinder test specimen on transverse axis (1) and stretch or compression load; The axis of the axis of described horizontal guide (3) and transverse axis (1) is in same direction; Described rubber tyre (5) is arranged on the top of transverse axis (1), the outside surface of the asphalt right cylinder test specimen on can exposure level axle (1), is driven and is promoted asphalt right cylinder test specimen by friction force and rotate with transverse axis (1) by oil motor (6); Described vertical charger (7) is arranged on the top of rubber tyre (5), can apply vertical load to described rubber tyre (5), thereby realize, the asphalt right cylinder test specimen on transverse axis (1) be applied to vertical load.
2. a kind of asphalt right cylinder test specimen multiaxis load testing machine according to claim 1, it is characterized in that: described frame includes the first end plate (8), the second end plate (9), the 3rd end plate (10), top board (11), base plate (12), wherein, described the first end plate (8), the second end plate (9), the 3rd end plate (10) vertical display, and on the axis direction of transverse axis (1) spaced apart successively; Between described the first end plate (8) and the second end plate (9), be connected with top board (11) and base plate (12), and be combined to form an accommodation space, described transverse axis (1), rubber tyre (5), oil motor (6) are placed in respectively in this accommodation space, and it is upper that one end of described transverse axis (1) is bound up on the first end plate (8) by bearing, and its other end is bound up in vertical horizontal load plate (2) by bearing through after the second end plate (9); The bottom of described vertical charger (7) applies vertical load through top board (11) to rubber tyre (5); Between described the second end plate (9) and the 3rd end plate (10), be connected with upper and lower opposed horizontal guide (3), it is upper that described horizontal load plate (2) is slidably mounted on this upper and lower opposed horizontal guide (3), and by being fixed on multiple horizontal load cylinder (4) on the second end plate (9) and the 3rd end plate (10) to its loading.
3. a kind of asphalt right cylinder test specimen multiaxis load testing machine according to claim 1, is characterized in that: the diameter D of described asphalt right cylinder test specimen is 100mm～200mm, and its length L is 1.0～4.0 times of diameter D.
4. a kind of asphalt right cylinder test specimen multiaxis load testing machine according to claim 1, it is characterized in that: the diameter of described rubber tyre (5) is 0.5～4 times of asphalt right cylinder test specimen diameter, tire pressure is 0.5～1.5MPa, and tread width is 5～50mm.
5. a kind of asphalt right cylinder test specimen multiaxis load testing machine according to claim 1, is characterized in that: the two ends of described asphalt right cylinder test specimen are fixed on transverse axis (1) by anchor ear (15) respectively.
6. according to a kind of asphalt right cylinder test specimen multiaxis load testing machine described in claim 1 or 4, it is characterized in that: described rubber tyre (5) is the rubber tyre of inflation.
7. a kind of asphalt right cylinder test specimen multiaxis load testing machine according to claim 2, it is characterized in that: the two ends of described horizontal load plate (2) are upper by adopting Horizontal limiting sleeve pipe (13) to be slidably mounted on upper and lower opposed horizontal guide (3), doing horizontal motion in horizontal guide (3).
8. a kind of asphalt right cylinder test specimen multiaxis load testing machine according to claim 2, is characterized in that: the Horizontal limiting sleeve pipe (13) passing for transverse axis (1) is installed on described the second end plate (9); The vertical limit casing (14) passing for vertical charger (7) bottom is installed on described top board (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420211203.0U CN203869955U (en) | 2014-04-28 | 2014-04-28 | Multi-axis loading test device for asphalt mixture cylinder body test piece |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420211203.0U CN203869955U (en) | 2014-04-28 | 2014-04-28 | Multi-axis loading test device for asphalt mixture cylinder body test piece |
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| CN203869955U true CN203869955U (en) | 2014-10-08 |
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| CN201420211203.0U Withdrawn - After Issue CN203869955U (en) | 2014-04-28 | 2014-04-28 | Multi-axis loading test device for asphalt mixture cylinder body test piece |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103940674A (en) * | 2014-04-28 | 2014-07-23 | 华南理工大学 | Multi-axial loading testing device for bituminous mixture cylinder test piece and testing method of device |
| CN108562429A (en) * | 2018-05-31 | 2018-09-21 | 西南交通大学 | Interference fit component fatigue experimental device based on rotoflector and test method |
-
2014
- 2014-04-28 CN CN201420211203.0U patent/CN203869955U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103940674A (en) * | 2014-04-28 | 2014-07-23 | 华南理工大学 | Multi-axial loading testing device for bituminous mixture cylinder test piece and testing method of device |
| CN108562429A (en) * | 2018-05-31 | 2018-09-21 | 西南交通大学 | Interference fit component fatigue experimental device based on rotoflector and test method |
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Effective date of registration: 20160324 Address after: 510065, No. 9, Heping Road, Guangdong, Guangzhou, two, Yuexiu District Patentee after: Guangdong elephant Traffic Technology Co., Ltd. Address before: 510640 Tianhe District, Guangdong, No. five road, No. 381, Patentee before: South China University of Technology |
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Granted publication date: 20141008 Effective date of abandoning: 20160504 |
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