CN103926157B - Asphalt inter-layer shearing strength aided measurement device - Google Patents
Asphalt inter-layer shearing strength aided measurement device Download PDFInfo
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- CN103926157B CN103926157B CN201410181079.2A CN201410181079A CN103926157B CN 103926157 B CN103926157 B CN 103926157B CN 201410181079 A CN201410181079 A CN 201410181079A CN 103926157 B CN103926157 B CN 103926157B
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Abstract
The present invention relates to asphalt interlayer measurement apparatus field, specifically disclose a kind of asphalt inter-layer shearing strength aided measurement device, including marshal piece mould (8), also including normal force force application mechanism, described normal force force application mechanism includes base plate (1), jack (6), spring (9), tension-compression sensor (5), secondary display instrument (12), spring supporting device; Described marshal piece mould (8), jack (6) are arranged on base plate (1); Described spring (9) is connected between spring supporting device and marshal piece mould (8), and described tension-compression sensor (5) is connected between jack (6) and spring supporting device, with secondary, described tension-compression sensor (5) also shows that instrument (12) is connected. The invention provides the inter-layer shearing strength auxiliary device under normal force with tangential force comprehensive function, there is simple and compact for structure, easy to use, low cost and other advantages.
Description
Technical field
The present invention relates to asphalt interlayer measurement apparatus field, be specifically related to a kind of asphalt inter-layer shearing strength aided measurement device.
Background technology
Inter-layer shearing strength is the important indicator evaluating asphalt contact status between layers, is also an important evaluation index of Service Performance of Asphalt Pavement.
At present, the equipment of interface layer shearing strength is only capable of compound test specimen is carried out the direct shear strength of tangential force effect and measures, and in a practical situation, asphalt layer can be influenced by the effect of normal force, and current detection equipment cannot complete the compound test specimen determination of shear strength based on normal force comprehensive function. Asphalt inter-layer shearing strength based on normal force is more consistent with bituminous paving interlayer stress ratio, more can accurately reflect out actual loading characteristic between supercrust, and current sensing equipment is unfavorable for the interlayer characteristic of deep study and analysis asphaltic road-mix surface course. Along with pavement construction and maintenance arrive on a large scale, in-place regeneration, road surface overlays certainly will bring new interlayer contact problem, and bituminous paving interlayer is also increasingly subject to people and pays close attention in conjunction with problem. It is therefore desirable to develop a set of asphalt inter-layer shearing strength device based on normal force comprehensive function, for the interlayer characteristic of deep study and analysis asphaltic road-mix surface course.
Summary of the invention
The technical problem to be solved is to provide a kind of asphalt inter-layer shearing strength aided measurement device, and this device can apply normal force at the trial and carry out shear strength test.
This invention address that the problems referred to above be the technical scheme is that
Asphalt inter-layer shearing strength aided measurement device, including marshal piece mould, also including normal force force application mechanism, described normal force force application mechanism includes base plate, jack, spring, tension-compression sensor, baffle plate, secondary display instrument, spring supporting device; Described marshal piece mould, baffle plate, jack are arranged on base plate;Described spring is connected between spring supporting device and marshal piece mould, described tension-compression sensor is connected between jack and spring supporting device, jack is not connected with one end of tension-compression sensor and is connected on baffle plate, with secondary, described tension-compression sensor also shows that instrument is connected. In prior art, in asphalt inter-layer shearing strength is tested, substantially the effect of normal force is not considered, and inventor finds in long-term research and test, bituminous paving is not limited only by the effect of tangential force, its normal force effect is also very important, Given this, inventors herein propose the aided measurement device in this programme, this device adopts jack and spring to coordinate, test specimen in marshal piece mould can being imposed normal force, this active force can be pulling force or pressure, carries out shear test with abundant simulated roadway force-bearing situation.
As a further improvement on the present invention, above-mentioned spring supporting device includes locating shaft, support bar, crossbeam, described locating shaft quantity is 2, every locating shaft is fixed on base plate by two support bars, described crossbeam two ends are connected on two locating shafts and can horizontally slip on locating shaft, described marshal piece mould, baffle plate, jack, tension-compression sensor, crossbeam right-to-left or be sequentially arranged from left to right, described spring is connected on crossbeam. spring supporting device adopts above-mentioned setting can provide pulling force for marshal piece mould, during jack force, promote crossbeam to move to the direction away from marshal piece mould, thus spring is produced pulling force, further the test specimen in marshal piece mould is produced pulling force. in this programme, inventor take into account the simulation providing normal tension first, according to normal habitual, the consideration of road pavement pressure, those of ordinary skill generally merely desires to pressure, and in shear strength test, its habituation is left out, and generally have ignored owing to road surface deforms, the pulling force brought to the mix asphalt bed of material that the reasons such as material layer is relatively thin cause, and inventor finds that this is also the problem can not ignore in long-term observation and research, thus propose the aided measurement device that can apply normal tension in this programme, shear test is carried out with the situation of abundant simulated roadway.
Further, above-mentioned number of springs is 2, and two springs be arranged in parallel, and two springs are connected with both sides before and after marshal piece mould respectively, adopts 2 springs that marshal piece mould is applied pulling force in this programme, and force balances more, and test effect is more.
Further, above-mentioned baffle plate is the structure that centre is high, both sides are low, not affect the stretching of spring.
Further, above-mentioned baffle plate is provided with two through holes for spring traverse, not affect the stretching of spring.
Further, above-mentioned crossbeam two ends are respectively sleeved on two locating shafts, and crossbeam slip on locating shaft is more prone to, resistance is less.
Further, above-mentioned tension-compression sensor is bolted on crossbeam and jack mould, and spring is connected on crossbeam and marshal piece mould by pin.
As the another improvement of the present invention, above-mentioned spring supporting device is gripper shoe, described marshal piece mould, spring, gripper shoe, tension-compression sensor, jack, baffle plate right-to-left or be sequentially arranged from left to right. In this programme, the said structure of spring supporting device can provide pressure for marshal piece mould, during jack force, promotes gripper shoe to move to the direction of marshal piece mould, thus marshal piece mould is applied normal pressure by extrusion spring.
Further, it is additionally provided with circular top plate between above-mentioned spring and marshal piece mould, described gripper shoe is circular slab, circular top plate contacts with the test specimen on marshal piece mould, the pressure of spring transmission is carried on test specimen by this circular top plate, it is more uniformly stressed, closer to true stressing conditions.
Further, above-mentioned asphalt inter-layer shearing strength aided measurement device also includes the second normal force force application mechanism; The second circular top plate that this second normal force force application mechanism includes being arranged on the right side of marshal piece mould and be sequentially arranged from left to right, the second spring, the second gripper shoe, the second tension-compression sensor, the second jack, second baffle and the second two the display instrument being connected with the second tension-compression sensor; Described second circular top plate is connected with marshal piece mould; Described second spring left end connects the second circular top plate, right-hand member and the second gripper shoe and is connected; Described second tension-compression sensor two ends are connected with the second gripper shoe and the second jack respectively by bolt; The baffle plate of described normal force force application mechanism, jack, tension-compression sensor, crossbeam right-to-left are sequentially arranged, and are positioned on the left of marshal piece mould. In this programme, normal force force application mechanism is set on the left of marshal piece mould, test specimen in marshal piece mould can be applied pulling force, right side is arranged can execute stressed second normal force force application mechanism, two normal force force application mechanisms can both releasably be connected on base plate, test specimen can be applied pulling force, pressure can be applied again, can fully imitate asphalt layer to do the actual loading situation on road surface and carry out shear test, two set normal force force application mechanisms can switch easily, easy to use, simple to operate.
To sum up, the invention has the beneficial effects as follows:
1, the test specimen in marshal piece mould can be imposed normal force by the present invention, this active force can be pulling force or pressure, shear test is carried out with abundant simulated roadway force-bearing situation, pressure gauge reading is controlled, it may be achieved draw based on normal direction for bitumen mixture specimen, the direct shear strength of pressure measures by jack;
2, the counterweight of the present invention is arranged on the outside of combination unit, convenient loading, it is to avoid produce to perturb and then measurement result is impacted to device because loading;
3, the data acquisition unit simple installation of the present invention, it is easy to read data;
4, present configuration is simply compact, with low cost;
5, when the present invention adopts two normal force force application mechanisms, test specimen can be applied pulling force, pressure can be applied again, can fully imitate asphalt layer and do the actual loading situation on road surface and carry out shear test, two set normal force force application mechanisms can switch easily, easy to use, simple to operate.
Accompanying drawing explanation
Fig. 1 is the top view of embodiment 2 Asphalt Mixture inter-layer shearing strength aided measurement device;
Fig. 2 is the structural representation of marshal piece mould;
Fig. 3 is the structural representation of embodiment 2 Asphalt Mixture inter-layer shearing strength aided measurement device;
Fig. 4 is the top view of embodiment 3 Asphalt Mixture inter-layer shearing strength aided measurement device;
Fig. 5 is the structural representation of embodiment 3 Asphalt Mixture inter-layer shearing strength aided measurement device;
Fig. 6 is the structural representation of embodiment 4.
Labelling and corresponding parts title in accompanying drawing: 1-base plate, 2-locating shaft, 3-support bar, 4-crossbeam, 5-tension-compression sensor, 6-jack, 8-marshal piece mould, 9-spring, 10-bolt, 11-baffle plate, 12-bis-displays instrument, 13-data line, 14-pin, 15-gripper shoe, 16-the second jack, 17-the second spring, 18-the second tension-compression sensor, 19-second baffle, 20-the second circular top plate, 21-the second gripper shoe, 22-circular top plate.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, the present invention is done detailed description further, but embodiments of the present invention are not limited to this.
Embodiment 1:
Asphalt inter-layer shearing strength aided measurement device, including marshal piece mould 8, normal force force application mechanism, this normal force force application mechanism includes base plate 1, jack 6, spring 9, tension-compression sensor 5, the fixing baffle plate 11 of jack 6, secondary display instrument 12, spring supporting device: marshal piece mould 8, baffle plate 11, jack 6 are arranged on base plate 1; Spring 9 is connected between spring supporting device and marshal piece mould 8; Tension-compression sensor 5 is connected between jack 6 and spring supporting device, and jack 6 is not connected with one end of tension-compression sensor 5 and is connected on baffle plate 11, with secondary, tension-compression sensor 5 shows that instrument 12 is connected also by data line 13. Marshal piece mould 8 adopts compound marshal piece mould conventional in prior art, and its concrete structure is referring to Fig. 2, and bitumen mixture specimen is just placed in this marshal piece mould 8 and carries out shearing strength test, and during test, tangential forces is applied from above. Acting as of spring supporting device in the present embodiment supports spring 9 and the power that jack 6 applies is passed to spring 9, it can be the structures such as the tabular that can move left and right, shaft-like, strip, its mounting means can be unsettled, it is possibility to have the supporting support can slided on base plate 1.
Embodiment 2:
As shown in figures 1 and 3, Fig. 1 is the top view of asphalt inter-layer shearing strength aided measurement device to asphalt inter-layer shearing strength aided measurement device in the present embodiment, and Fig. 3 is the front view of asphalt inter-layer shearing strength aided measurement device.
On the basis of embodiment 1, the spring supporting device of the asphalt inter-layer shearing strength aided measurement device in the present embodiment includes 2 locating shafts, 3,1 crossbeam 4: every locating shaft of 2,4 support bars 2 and is fixed on base plate 1 by two support bars 3, crossbeam 4 two ends are connected on two locating shafts 2, and can horizontally slip on locating shaft 2, spring 9 is connected on crossbeam 4, above-mentioned marshal piece mould 8, baffle plate 11, jack 6, tension-compression sensor 5, crossbeam 4 right-to-left or be sequentially arranged from left to right. Spring 9 quantity is 2, and two springs 9 be arranged in parallel and index, length are identical, and two springs 9 are connected with both sides before and after marshal piece mould 8 respectively.
The present embodiment is the asphalt inter-layer shearing strength aided measurement device that can realize applying normal tension, is sequentially disposed in example with marshal piece mould 8, baffle plate 11, jack 6, tension-compression sensor 5, crossbeam 4 right-to-left below and illustrates that the concrete fit system of all parts of asphalt inter-layer shearing strength aided measurement device of the present embodiment and normal tension apply principle:
As shown in Figure 1,4 support bars 3 are fixed on base plate 1, being installed along the length direction of base plate 1 above support bar 3 top namely base plate 1 abreast by 2 locating shafts 2, be connected by bolt 10 between support bar 3 with base plate 1 and locating shaft 2,2 locating shafts 2 are identical to the height of base plate 1; Crossbeam 4 two ends are set on locating shaft 2, and can horizontally slip on locating shaft 2, and crossbeam 4 is provided with 2 pins. Marshal piece mould 8 is arranged on the right side of crossbeam 4, is bolted on base 1, and before and after marshal piece mould 8, both sides are also correspondingly arranged on two pins 14 respectively, makes two springs 9 can be arranged on abreast between crossbeam 4 and marshal piece mould 8.Baffle plate 11 is arranged on the left of marshal piece mould 8, it is between crossbeam 4 and baffle plate 11 that jack 6 is arranged on the left of baffle plate 11, jack 6 left end is connected with tension-compression sensor 5 by bolt 10, right side is fixed by baffle plate 11, tension-compression sensor 5 left end is then fixed on crossbeam 4 centre position by bolt 10, with secondary, tension-compression sensor 5 shows that instrument 12 is connected by data line 13.
Above-mentioned baffle plate 11 is be provided with two through holes for spring 9 traverse in the structure or baffle plate 11 that centre is high, both sides are low, not affect the stretching of spring. In practical application, baffle plate 11 can also adopt other structures.
In the present embodiment, spring 9, crossbeam 4, marshal piece mould 8 are at same level height; Crossbeam 4 can slide on locating shaft 2, in order to eliminate self friction power, result of the test is affected, it is ensured that the accuracy of test, and crossbeam 4 uses light-high-strength not easily to get rusty material as far as possible, for instance but it is not limited to aluminium alloy, titanium alloy, almag; Locating shaft 2 is chronically exposed in air due to needs, and the material not easily got rusty need to be selected to make, for instance but it is not limited to rustless steel, copper, steel chromium plating; Spring 9 can be processed to the monomer of different stiffness factor, to be suitable for different situations.
Its principle applying normal tension is as follows:
After assay device assembles, according to test needs, select a suitable normal tension. Use this device, by jack 6, marshal piece mould 8 is applied selected normal tension, the normal tension that jack 6 applies passes to marshal piece mould 8 by crossbeam 4, spring 9, when applying normal tension, carry out direct shear test, measuring asphalt inter-layer shearing strength under normal tension with tangential force comprehensive function, the size of its normal tension can read according to the secondary display instrument 12 being connected with tension-compression sensor 5.
Additionally, in order to ensure to gather the accuracy of data, it is necessary to selecting suitable tension-compression sensor, adopting maximum range in this example is the tension-compression sensor of 10KN, in practical application, it is possible to select the range of tension-compression sensor 5 according to specific needs.
Embodiment 3:
As shown in Figure 4 and Figure 5, on the basis of embodiment 1, in the present embodiment, spring supporting device is circular base slab 15, is additionally provided with circular top plate 22 between described spring 9 and marshal piece mould 8; Described marshal piece mould 8, circular top plate 22, spring 9, gripper shoe 15, tension-compression sensor 5, jack 6, baffle plate 11 right-to-left or be sequentially arranged from left to right, the present embodiment is the asphalt inter-layer shearing strength aided measurement device that can realize applying normal pressure, and the concrete matching relationship of all parts in this device and the principle of its applying normal pressure are described in the way of being sequentially arranged from left to right by marshal piece mould 8, circular top plate 22, spring 9, gripper shoe 15, tension-compression sensor 5, jack 6, baffle plate 11 below:
Marshal piece mould 8 is arranged on baffle plate 11 left side, tension-compression sensor 5 is bolted in gripper shoe 15, tension-compression sensor 5 is made to be connected with jack 6 again through bolt, gripper shoe 15 and circular top plate 22 are connected by spring 9, and circular top plate 22 are contacted with compound test specimen in marshal piece mould 8. Circular top plate 22 size is preferably identical with sample dimensions size with size, during installation, it is ensured that jack 6, circular top plate 22 and gripper shoe 15 are in identical height.
After assay device assembles, according to test needs, select a suitable normal pressure, by jack 6, marshal piece mould 8 is applied selected normal pressure, the normal pressure that jack 6 applies passes to test specimen via gripper shoe 15, spring 9 and circular top plate 22, last when applying normal pressure, carry out direct shear test, measure asphalt inter-layer shearing strength under normal pressure with tangential force comprehensive function.The normal pressure of its applying can be read by the secondary display instrument 12 being connected with tension-compression sensor 5.
Embodiment 4:
As shown in Figure 6, on the basis of embodiment 2, asphalt inter-layer shearing strength aided measurement device in the present embodiment includes two set normal force force application mechanisms, first set normal force force application mechanism is the normal force force application mechanism in embodiment 2, its baffle plate 11, jack 6, tension-compression sensor 5, crossbeam 4 right-to-left are sequentially arranged, and are positioned on the left of marshal piece mould 8.
And second circular top plate the 20, second spring the 17, second gripper shoe the 21, second tension-compression sensor the 18, second jack 16 that the second normal force force application mechanism includes being arranged on the right side of marshal piece mould 8 and be sequentially arranged from left to right, second baffle 19 and the second two display instrument being connected with the second tension-compression sensor 18; Described second circular top plate 20 is connected with marshal piece mould 8; Described second spring 17 left end connects the second circular top plate 20, right-hand member and the second gripper shoe 21 and is connected; Described second tension-compression sensor 18 two ends are connected with the second gripper shoe 21 and the second jack 16 respectively by bolt.
In the present embodiment, two set normal force force application mechanisms are set, both normal tension can have been applied, can also applying normal pressure, the conversion of two set normal force force application mechanisms is convenient to, and simply removes when needs apply pulling force and executes stressed normal direction force application mechanism, vice versa, asphalt inter-layer shearing strength under normal force with tangential force comprehensive function can not only be measured, and can select as required to apply normal tension or pressure, and switch easy to use.
Below being only the preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-described embodiment, and all technical schemes belonged under thinking of the present invention belong to protection scope of the present invention. It should be pointed out that, for those skilled in the art, some improvements and modifications without departing from the principles of the present invention, should be regarded as protection scope of the present invention.
Claims (9)
1. asphalt inter-layer shearing strength aided measurement device, including marshal piece mould (8), it is characterized in that, also including normal force force application mechanism, described normal force force application mechanism includes base plate (1), jack (6), spring (9), tension-compression sensor (5), baffle plate (11), secondary display instrument (12), spring supporting device; Described marshal piece mould (8), jack (6), baffle plate (11) are arranged on base plate (1); Described spring (9) is connected between spring supporting device and marshal piece mould (8), described tension-compression sensor (5) is connected between jack (6) and spring supporting device, jack (6) is not connected with one end of tension-compression sensor (5) and is connected on baffle plate (11), with secondary, described tension-compression sensor (5) also shows that instrument (12) is connected.
2. asphalt inter-layer shearing strength aided measurement device according to claim 1, it is characterized in that, described spring supporting device includes locating shaft (2), support bar (3), crossbeam (4), described locating shaft (2) quantity is 2, every locating shaft (2) is fixed on base plate (1) by two support bars (3), described crossbeam (4) two ends are connected to two locating shafts (2) and above and can horizontally slip on locating shaft (2), described marshal piece mould (8), baffle plate (11), jack (6), tension-compression sensor (5), crossbeam (4) right-to-left or be sequentially arranged from left to right, described spring (9) is connected on crossbeam (4).
3. asphalt inter-layer shearing strength aided measurement device according to claim 2, it is characterised in that described baffle plate (11) is the structure that centre is high, both sides are low.
4. asphalt inter-layer shearing strength aided measurement device according to claim 2, it is characterised in that be provided with two through holes for spring (9) traverse on described baffle plate (11).
5. asphalt inter-layer shearing strength aided measurement device according to claim 2, it is characterised in that described crossbeam (4) two ends are respectively sleeved on two locating shafts (2).
6. according to the arbitrary described asphalt inter-layer shearing strength aided measurement device of claim 2 to 5, it is characterized in that, described tension-compression sensor (5) is fixed on by bolt (10) on crossbeam (4) and jack (6), and spring (9) is connected on crossbeam (4) and marshal piece mould (8) by pin (14).
7. asphalt inter-layer shearing strength aided measurement device according to claim 1, it is characterized in that, described spring supporting device is gripper shoe (15), described marshal piece mould (8), spring (9), gripper shoe (15), tension-compression sensor (5), jack (6), baffle plate (11) right-to-left or be sequentially arranged from left to right.
8. asphalt inter-layer shearing strength aided measurement device according to claim 7, it is characterised in that being additionally provided with circular top plate (22) between described spring (9) and marshal piece mould (8), described gripper shoe (15) is circular slab.
9. according to the arbitrary described asphalt inter-layer shearing strength aided measurement device of claim 1 to 5, it is characterised in that also include the second normal force force application mechanism;
Described second normal force force application mechanism include being arranged on marshal piece mould (8) right side and the second circular top plate (20) being sequentially arranged from left to right, the second spring (17), the second gripper shoe (21), the second tension-compression sensor (18), the second jack (16), second baffle (19) and be connected with the second tension-compression sensor (18) show instrument the second two times; Described second circular top plate (20) is connected with marshal piece mould (8); Described second spring (17) left end connects the second circular top plate (20), right-hand member and the second gripper shoe (21) and is connected; Described second tension-compression sensor (18) two ends are connected with the second gripper shoe (21) and the second jack (16) respectively by bolt;
The baffle plate (11) of described normal force force application mechanism, jack (6), tension-compression sensor (5), crossbeam (4) right-to-left are sequentially arranged, and are positioned at marshal piece mould (8) left side.
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| CN201410181079.2A CN103926157B (en) | 2014-04-30 | 2014-04-30 | Asphalt inter-layer shearing strength aided measurement device |
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| CN201410181079.2A CN103926157B (en) | 2014-04-30 | 2014-04-30 | Asphalt inter-layer shearing strength aided measurement device |
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| CN103926157B true CN103926157B (en) | 2016-06-15 |
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| CN105424504A (en) * | 2015-11-04 | 2016-03-23 | 长沙理工大学 | Asphalt mixture torsion shear test device capable of applying normal stress |
| CN107655826A (en) * | 2017-09-06 | 2018-02-02 | 河海大学 | A kind of device and its measuring method for measuring steel and concrete interface shearing |
| CN109142155B (en) * | 2018-06-28 | 2024-03-19 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Road interface characteristic testing device and method |
| CN111141624A (en) * | 2020-02-25 | 2020-05-12 | 中南大学 | Test device and method for measuring interlayer shearing performance of pavement |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1818611A (en) * | 2006-03-21 | 2006-08-16 | 武汉理工大学 | Method for measuring adhering material shearing performance and its experimental device thereof |
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| US5275056A (en) * | 1992-10-20 | 1994-01-04 | Rainhart Co. | Gyratory shear material compacting device |
| US5712431A (en) * | 1996-05-01 | 1998-01-27 | Endura-Tec Systems Corporation | Device and method for testing the shear response of a material in response to an applied force |
| CN101464239A (en) * | 2009-01-09 | 2009-06-24 | 长安大学 | Interlayer shear strength detecting instrument for asphalt pavement |
| CN201852751U (en) * | 2010-09-25 | 2011-06-01 | 江苏省交通科学研究院股份有限公司 | Shearing mould for pavement test specimen |
| CN102998174A (en) * | 2011-09-09 | 2013-03-27 | 中交四航工程研究院有限公司 | Long-term loading apparatus system for concrete sample durability tests |
| CN203785970U (en) * | 2014-04-30 | 2014-08-20 | 西南交通大学 | Auxiliary measuring device for interlayer shearing strength of bituminous mixture |
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| CN1818611A (en) * | 2006-03-21 | 2006-08-16 | 武汉理工大学 | Method for measuring adhering material shearing performance and its experimental device thereof |
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