CN104655557A - Equipment for measuring interlamellar jointing direct shear resistance between asphalt surface course and semi-rigid base - Google Patents
Equipment for measuring interlamellar jointing direct shear resistance between asphalt surface course and semi-rigid base Download PDFInfo
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- CN104655557A CN104655557A CN201310594391.XA CN201310594391A CN104655557A CN 104655557 A CN104655557 A CN 104655557A CN 201310594391 A CN201310594391 A CN 201310594391A CN 104655557 A CN104655557 A CN 104655557A
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Abstract
The invention discloses equipment for measuring interlamellar jointing direct shear resistance between an asphalt surface course and a semi-rigid base. The equipment comprises a reaction frame, a test-piece pedestal, a vertical load loading device and a horizontal load loading device, wherein at least a part of the test-piece pedestal is fixed to the reaction frame and height of the test-piece pedestal is corresponding to height of a semi-rigid base in a test-piece; the vertical load loading device comprises a vertical load generation part, a vertical load loading part, a vertical load top and a bearing plate; and the horizontal load loading device comprises a horizontal load generation part, a horizontal load loading part and a horizontal load top. The vertical load generation part applies 10-20 KN of vertical pressure on the test-piece through the vertical load loading part, the vertical load top and the bearing plate. The horizontal load generation part applies 0-50 KN of horizontal pressure on the test-piece through the horizontal load loading part and the horizontal load top, and loading velocity of the horizontal pressure is 1mm/min.
Description
Technical field
The present invention relates to a kind of equipment evaluated asphalt mat and semi-rigid type base interlayer and connect anti-staight scissors performance, particularly relate to the equipment that a kind of measurement asphalt mat of displacement controllable and semi-rigid type base interlayer connect anti-staight scissors performance.
Background technology
For semi-rigid asphalt pavement, guarantee that anti-shear performance good between semi-rigid type base and asphalt mat is very important.If surface layer and basic unit's anti-shear performance not good, asphalt mat can be caused to occur rut, gather around the diseases such as bag, crack, passing, substantially reduce the serviceable life of highway.
In order to evaluate the anti-shear performance that semi-rigid type base and asphalt mat interlayer connect, all carry out correlative study both at home and abroad, but, due to not clear and definite construction technique normalizing, cause that test method is in disorder to differ, test apparatus is uneven, and these instruments are from During Geotechnical Tests instrument reform mostly, can unqualified movement under horizontal thrust effect, if to produce larger shear displacemant not only meaningless in test, also normal reading can be disturbed.Simultaneously also not used for the die trial of shaping semi-rigid type base with asphalt mat bilayer test specimen, utilize the test block of wheel milling process forming double-layer often, inconsistent with the size of shear after test block forming, need to polish to it, can cause structural plane before shearing, send out into slip like this, finally cause the accuracy tested to be subject to larger interference.
The information being disclosed in this background of invention technology part is only intended to deepen the understanding to general background technology of the present invention, and should not be regarded as admitting or imply in any form that this information structure has been prior art known in those skilled in the art.
Summary of the invention
The object of this invention is to provide a kind of equipment measured asphalt mat and semi-rigid type base interlayer and connect anti-staight scissors performance.This equipment can simulate feature and the environment for use of asphalt mat and semi-rigid type base interlayer, the double-deck test specimen of the semi-rigid type base of shaping different-thickness and asphalt mat, and by Bit andits control horizontal thrust and then evaluate the anti-shear performance that asphalt mat and semi-rigid type base interlayer connect.Meanwhile, this equipment both may be used for working-yard, also may be used for indoor detection.
For achieving the above object, the invention provides a kind of equipment measured asphalt mat and semi-rigid type base interlayer and connect anti-staight scissors performance, it comprises: reaction frame, and it is rigid support; Test piece base, it is fixed to described reaction frame at least partially, and the height of this test piece base corresponds to the thickness of semi-rigid type base in test specimen; Vertical load charger, it comprises vertical load generating unit, vertical load loading component, vertical load top and bearing plate; Wherein, described vertical load generating unit is fixed to described reaction frame, described bearing plate is arranged on the top of test specimen, described vertical load loading component is vertically attached to described vertical load generating unit movably, the bottom of this vertical load loading component connects described vertical load top, and in use, described vertical load withstands on the center of described bearing plate, thus apply pressure at right angle to test specimen; And horizontal load charger, it comprises horizontal load generating unit, horizontal load loading component and horizontal load top; Wherein, described horizontal load loading component is connected on described reaction frame in the horizontal direction slidably, one end of this horizontal load loading component is connected to described horizontal load generating unit, and the other end of this horizontal load loading component connects described horizontal load top, this horizontal load comes directly towards the shape of shape corresponding to the outside surface of test specimen of the surface of contact contacted with test specimen; Further, described horizontal load loading component is provided with horizontal pressure force sensor and horizontal displacement sensors; Wherein, described vertical load generating unit applies the pressure at right angle of 10-20KN by vertical load loading component, vertical load top and bearing plate to test specimen; Described horizontal load generating unit comes directly towards by horizontal load loading component and horizontal load horizontal pressure force test specimen being applied to 0-50KN, and the loading velocity of this horizontal pressure force is 1mm/min.
The equipment that above-mentioned measurement asphalt mat and semi-rigid type base interlayer connect anti-staight scissors performance also comprises data acquisition control device and display device; Wherein, described data acquisition control device and described horizontal pressure force sensor and horizontal displacement sensors are electrically connected, and receive the data that described horizontal pressure force sensor and horizontal displacement sensors export; Further, described data acquisition control device is also electrically connected with described display device, thus exports the data received to described display device after treatment.
The equipment that above-mentioned measurement asphalt mat and semi-rigid type base interlayer connect anti-staight scissors performance also comprises the die trial for shaping test piece; Described die trial comprise can vertical one be split into two two semi arches, its both sides are respectively welded two bolts and are equipped with a connecting rod, for dismounting die trial; Wherein, described die trial also comprises multiple clean steel pad identical with its diameter, by combining the pad of different-thickness, the test specimen of shaping differing heights.
Above-mentioned measurement asphalt mat and semi-rigid type base interlayer connect in the equipment of anti-staight scissors performance, and described test piece base comprises Part I and Part II; This Part I is fixed to the bottom of the side of described reaction frame, and the dismountable Part I that is connected to of this Part II, the inner surface configuration of the accommodation section of the test piece base of this Part I and Part II composition corresponds to the external surface shape of test specimen.
Above-mentioned measurement asphalt mat and semi-rigid type base interlayer connect in the equipment of anti-staight scissors performance, and described test specimen comprises asphalt mat and semi-rigid type base and the interlayer be arranged between asphalt mat and semi-rigid type base and connects measure.
Above-mentioned measurement asphalt mat and semi-rigid type base interlayer connect in the equipment of anti-staight scissors performance, and described horizontal load comes directly towards the contact site that contacts with test specimen in described asphalt mat place.
Above-mentioned measurement asphalt mat and semi-rigid type base interlayer connect in the equipment of anti-staight scissors performance, and described test specimen is the cylinder specimen of diameter 150mm, and wherein the thickness of semi-rigid type base is 80mm, and the thickness of asphalt mat is 30mm, 40mm, 50mm or 80mm.
Above-mentioned measurement asphalt mat and semi-rigid type base interlayer connect in the equipment of anti-staight scissors performance, and the shape that described horizontal load comes directly towards the surface of contact contacted with test specimen is semi arch.
Above-mentioned measurement asphalt mat and semi-rigid type base interlayer connect in the equipment of anti-staight scissors performance, described horizontal load generating unit comprises servomotor and speed reduction unit, the input end of the output terminal connection reducer of this servomotor, the output terminal of this speed reduction unit connects described horizontal load loading component, to apply to described horizontal load generating unit the horizontal pressure force that loading velocity is 1mm/min.
Above-mentioned measurement asphalt mat and semi-rigid type base interlayer connect in the equipment of anti-staight scissors performance, and described vertical load generating unit is motor or lifting jack.
After the present invention takes above technical scheme, it has following beneficial effect:
1, equipment of the present invention can simulate feature and the environment for use of asphalt mat and semi-rigid type base interlayer, respectively the double-deck test specimen of shaping different-thickness, different attachment material, and the laminating of test specimen and test piece base is good, guarantees the accuracy tested.
2, equipment of the present invention in use, and test loading procedure utilizes Bit andits control loading velocity, and can be demonstrated the data of stress-time, displacement versus time, stress-displacement by display device.
3, equipment of the present invention is relatively light, and each composition system and device all works alone, convenient maintenance; And dismounting is flexibly, be convenient to mobile carrying, therefore can both in-door and outdoor detection simultaneously.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the A-A diagrammatic cross-section of Fig. 1.
Embodiment
With reference to shown in accompanying drawing, the invention provides a kind of equipment measured asphalt mat and semi-rigid type base interlayer and connect anti-staight scissors performance, it can comprise:
Reaction frame 1, this reaction frame 1 is rigid support, and reaction frame is mainly used to fixing staight scissors test specimen, and effect counter-force when staight scissors are provided;
Test piece base 2, it is fixed to reaction frame 1 at least partially, and the height of this test piece base 2 corresponds to the thickness of semi-rigid type base in test specimen 100;
Vertical load charger 4, it comprises vertical load generating unit 41, vertical load loading component 42, vertical load top 43 and bearing plate 44; Wherein, vertical load generating unit 41 is fixed to reaction frame 1, bearing plate 44 is arranged on the top of test specimen 100, vertical load loading component 42 is vertically attached to vertical load generating unit 41 movably, the bottom of this vertical load loading component 42 connects vertical load top 43, and in use, vertical load top 43 withstands on the center of bearing plate 44, thus applies pressure at right angle to test specimen 100;
Horizontal load charger 5, it comprises horizontal load generating unit 51, horizontal load loading component 52 and horizontal load top 53; Wherein, horizontal load loading component 52 is connected on reaction frame 1 in the horizontal direction slidably, one end of this horizontal load loading component 52 is connected to horizontal load generating unit 51, and the other end of this horizontal load loading component 52 connects horizontal load top 53, the shape of the surface of contact that this horizontal load top 53 contacts with test specimen 100 corresponds to the shape of the outside surface of test specimen 100; Further, horizontal load loading component 52 is provided with horizontal pressure force sensor and horizontal displacement sensors (not shown);
Wherein, vertical load generating unit 41 applies the pressure at right angle (being converted to pressure is 0.6 ~ 1.1MPa) of 10-20KN by vertical load loading component 42, vertical load top 43 and bearing plate 44 pairs of test specimens 100; Horizontal load generating unit 51 comes directly towards by horizontal load loading component 52 and horizontal load the horizontal pressure force that 53 pairs of test specimens 100 apply 0-50KN, and the loading velocity of this horizontal pressure force is 1mm/min.
In the present invention, measure the equipment that asphalt mat and semi-rigid type base interlayer connect anti-staight scissors performance and can also comprise data acquisition control device and display device (not shown); Wherein, data acquisition control device and horizontal pressure force sensor and horizontal displacement sensors are electrically connected, and receive the data that horizontal pressure force sensor and horizontal displacement sensors export; Further, data acquisition control device is also electrically connected with display device, thus exports the data received to display device after treatment.
The technological means that data acquisition control device can be commonly used by those skilled in the art realizes, due to horizontal pressure force sensor sensing be the data of horizontal pressure force and horizontal displacement sensors sensing be the data of displacement, therefore, data after data acquisition control device process can be the relations (i.e. stress time curve) of horizontal pressure force and time, or the relation of displacement and time (i.e. displacement-time curve), or the relation of horizontal pressure force and displacement (i.e. stress-displacement curve).In addition, these data outputting to display device also can carry out storing or printing; Further, the display of these data can be real-time.
In the present invention, measure equipment that asphalt mat and semi-rigid type base interlayer connect anti-staight scissors performance and can also comprise die trial (not shown) for shaping test piece.Described die trial can comprise can vertical one be split into two two semi arches, its both sides are respectively welded two bolts and are equipped with a connecting rod, for dismounting die trial; Wherein, described die trial also comprises multiple clean steel pad identical with its diameter, by combining the pad of different-thickness, and can the test specimen of shaping differing heights.
In one embodiment of the invention, the thickness of this die trial is 15mm, and diameter is 150mm, is highly 240mm, and die trial adopts clean steel to make.In order to control the thickness of semi-rigid type base and asphalt mat, diameter made by this mould supporting is 150mm, and thickness is respectively the clean steel pad of 30mm, 40mm, 50mm, by combining the pad of different-thickness, then and can the test specimen of shaping differing heights.Such as, test specimen is the cylinder specimen of diameter 150mm, wherein the thickness of semi-rigid type base is 80mm, interlayer connection measure is emulsified asphalt class, heat spills the measures to improve interlayer conditions such as type pitch class, crushed stone sealing class, thickness is at about 5mm, when not increasing pad, the height of whole test specimen is 240mm; And if increase the pad of a 40mm, the height of whole test specimen is then 200mm; Or when the pad of the pad of an increase 40mm and a 50mm, the height of whole test specimen is 150mm.Therefore, in the test specimen that the present invention is shaping, the thickness of asphalt mat can be 30mm, 40mm, 50mm or 80mm.
In one embodiment of the invention, test piece base 2 can comprise Part I 21 and Part II 22; This Part I 21 is fixed to the bottom of the side of reaction frame 1, and the dismountable Part I 21 that is connected to of this Part II 22, the inner surface configuration of the accommodation section of the test piece base 2 that this Part I 21 and Part II 22 form corresponds to the external surface shape of test specimen.That is, under test specimen is cylindrical situation, the inside surface of the accommodation section of test piece base 2 also should form corresponding cylindrical shape.
Further, in the present invention, horizontal load generating unit 51 can comprise servomotor and speed reduction unit, the input end of the output terminal connection reducer of this servomotor, the output terminal of this speed reduction unit connects horizontal load loading component 52, to apply to horizontal load generating unit 52 horizontal pressure force that loading velocity is 1mm/min.In addition, vertical load generating unit 41 can be motor or lifting jack, and vertical load generating unit 41 is motor in the embodiment shown in fig. 1.
Below, the use of equipment of the present invention is described with an instantiation.
First, use the die trial shaping test piece in the present invention, it can select the pad of different-thickness (selecting 80mm semi-rigid type base and 40mm asphalt mat in this example) according to designing requirement, utilize the semi-rigid type base test specimen that the shaping 80mm of static pressure method is thick, at its surface smear attachment material (crushed stone sealing, every square meter 1.5kg/m after health terminates
2heated bitumen, spreads paving 10kg/m again above heated bitumen
29.5mm ~ 13.2mm rubble, average thickness is that 5mm connects measure between left and right), after material cooled to be coupled, again test specimen is loaded in die trial, utilizes static pressure method formable layer asphalt (asphalt mat thickness 40mm) test specimen thereon, for subsequent use after the demoulding.
Then, test specimen after shaping is placed in test piece base, and the Part I of test piece base is connected with Part II with fastening test specimen, wherein the height of test piece base should correspond to the thickness of semi-rigid type base in test specimen, that is, the level height of interlayer connection measure should on the upper surface of test piece base, thus make test piece base can not connect to interlayer the acting force that measure has horizontal direction.
Then, utilize vertical load generating unit pressure at right angle to be applied on bearing plate by vertical load loading component and vertical load top, and by bearing plate, pressure uniform is applied on the upper surface of test specimen.This vertical load generating unit can motor, also can be other the device such as weight stack or lifting jack.In this example, vertical load is 0.7MPa, and this vertical load is mainly used in the pressure of simulated automotive tire road pavement, and the ground connection pressure of doughnut, at 0.6 ~ 1.1MPa, is therefore arranged on 0.7MPa and is relatively suitable for.
After pressure at right angle is stable, open the servomotor of horizontal load charger, and the rotating speed controlling servomotor is to control at constant 1mm/min by the loading velocity of horizontal pressure force, by horizontal load loading component and horizontal load top, test specimen is applied to the horizontal pressure force of this 1mm/min loading velocity.Wherein, described horizontal load comes directly towards the contact site that contacts with test specimen in described asphalt mat place, and correspondingly, the shape that described horizontal load comes directly towards the surface of contact contacted with test specimen is semi arch, this semi arch is corresponding with the shape of columniform test specimen, thus horizontal pressure force can be applied to equably the asphalt mat place of test specimen.
While applying horizontal pressure force, data acquisition control device is utilized to obtain the data of horizontal pressure force sensor and horizontal displacement sensors, and acquisition and processing related data.
Along with horizontal load charger constantly applies the horizontal pressure force of 1mm/min loading velocity, the level pressure value that horizontal pressure force sensor records can increase gradually, until when reaching a certain numerical value, semi-rigid type base is separated with asphalt mat (namely interlayer connection measure was lost efficacy), and the level pressure value that now horizontal pressure force sensor records can decline to a great extent suddenly, this maximal value recorded then may be used for evaluating the anti-shear performance between semi-rigid type base and asphalt mat, and namely this value is exactly the maximum anti-shearing stress that interlayer connection measure can bear.
Claims (10)
1. measure the equipment that asphalt mat and semi-rigid type base interlayer connect anti-staight scissors performance, it is characterized in that, comprising:
Reaction frame, it is rigid support;
Test piece base, it is fixed to described reaction frame at least partially, and the height of this test piece base corresponds to the thickness of semi-rigid type base in test specimen;
Vertical load charger, it comprises vertical load generating unit, vertical load loading component, vertical load top and bearing plate; Wherein, described vertical load generating unit is fixed to described reaction frame, described bearing plate is arranged on the top of test specimen, described vertical load loading component is vertically attached to described vertical load generating unit movably, the bottom of this vertical load loading component connects described vertical load top, and in use, described vertical load withstands on the center of described bearing plate, thus apply pressure at right angle to test specimen; And
Horizontal load charger, it comprises horizontal load generating unit, horizontal load loading component and horizontal load top; Wherein, described horizontal load loading component is connected on described reaction frame in the horizontal direction slidably, one end of this horizontal load loading component is connected to described horizontal load generating unit, and the other end of this horizontal load loading component connects described horizontal load top, this horizontal load comes directly towards the shape of shape corresponding to the outside surface of test specimen of the surface of contact contacted with test specimen; Further, described horizontal load loading component is provided with horizontal pressure force sensor and horizontal displacement sensors;
Wherein, described vertical load generating unit applies the pressure at right angle of 10-20KN by vertical load loading component, vertical load top and bearing plate to test specimen; Described horizontal load generating unit comes directly towards by horizontal load loading component and horizontal load horizontal pressure force test specimen being applied to 0-50KN, and the loading velocity of this horizontal pressure force is 1mm/min.
2. measurement asphalt mat according to claim 1 and semi-rigid type base interlayer connect the equipment of anti-staight scissors performance, it is characterized in that: also comprise data acquisition control device and display device;
Wherein, described data acquisition control device and described horizontal pressure force sensor and horizontal displacement sensors are electrically connected, and receive the data that described horizontal pressure force sensor and horizontal displacement sensors export; Further, described data acquisition control device is also electrically connected with described display device, thus exports the data received to described display device after treatment.
3. measurement asphalt mat according to claim 2 and semi-rigid type base interlayer connect the equipment of anti-staight scissors performance, it is characterized in that: also comprise the die trial for shaping test piece;
Described die trial comprise can vertical one be split into two two semi arches, its both sides are respectively welded two bolts and are equipped with a connecting rod, for dismounting die trial; Wherein, described die trial also comprises multiple clean steel pad identical with its diameter, by combining the pad of different-thickness, the test specimen of shaping differing heights.
4. measurement asphalt mat according to claim 1 and semi-rigid type base interlayer connect the equipment of anti-staight scissors performance, it is characterized in that: described test piece base comprises Part I and Part II; This Part I is fixed to the bottom of the side of described reaction frame, and the dismountable Part I that is connected to of this Part II, the inner surface configuration of the accommodation section of the test piece base of this Part I and Part II composition corresponds to the external surface shape of test specimen.
5. measurement asphalt mat according to claim 1 and semi-rigid type base interlayer connect the equipment of anti-staight scissors performance, it is characterized in that: described test specimen comprises asphalt mat and semi-rigid type base and the interlayer be arranged between asphalt mat and semi-rigid type base and connects measure.
6. measurement asphalt mat according to claim 5 and semi-rigid type base interlayer connect the equipment of anti-staight scissors performance, it is characterized in that: described horizontal load comes directly towards the contact site that contacts with test specimen in described asphalt mat place.
7. measurement asphalt mat according to claim 5 and semi-rigid type base interlayer connect the equipment of anti-staight scissors performance, it is characterized in that: described test specimen is the cylinder specimen of diameter 150mm, wherein the thickness of semi-rigid type base is 80mm, and the thickness of asphalt mat is 30mm, 40mm, 50mm or 80mm.
8. measurement asphalt mat according to claim 7 and semi-rigid type base interlayer connect the equipment of anti-staight scissors performance, it is characterized in that: the shape that described horizontal load comes directly towards the surface of contact contacted with test specimen is semi arch.
9. the measurement asphalt mat according to claim 1-8 any one and semi-rigid type base interlayer connect the equipment of anti-staight scissors performance, it is characterized in that: described horizontal load generating unit comprises servomotor and speed reduction unit, the input end of the output terminal connection reducer of this servomotor, the output terminal of this speed reduction unit connects described horizontal load loading component, to apply to described horizontal load generating unit the horizontal pressure force that loading velocity is 1mm/min.
10. the measurement asphalt mat according to claim 1-8 any one and semi-rigid type base interlayer connect the equipment of anti-staight scissors performance, it is characterized in that: described vertical load generating unit is motor or lifting jack.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310594391.XA CN104655557B (en) | 2013-11-21 | 2013-11-21 | The equipment that measurement asphalt surface course is coupled anti-staight scissors performance with semi-rigid type base interlayer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310594391.XA CN104655557B (en) | 2013-11-21 | 2013-11-21 | The equipment that measurement asphalt surface course is coupled anti-staight scissors performance with semi-rigid type base interlayer |
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| CN104655557A true CN104655557A (en) | 2015-05-27 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108240965A (en) * | 2017-12-06 | 2018-07-03 | 江西省高速公路投资集团有限责任公司 | A kind of bituminous paving interlayer adhesion strength detection device and its detection method |
| CN110633505A (en) * | 2019-08-21 | 2019-12-31 | 西南交通大学 | Train operation safety evaluation method and device |
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| US4934185A (en) * | 1988-01-25 | 1990-06-19 | Mitsubishi Denki Kabushiki Kaisha | Device for measuring adhesive strength and shear strength of coated film |
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