CN107192613A - Asphalt spilt test based on actual measurement geometrical morphology carefully observes method for testing - Google Patents
Asphalt spilt test based on actual measurement geometrical morphology carefully observes method for testing Download PDFInfo
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- 238000012360 testing method Methods 0.000 title claims abstract description 109
- 239000010426 asphalt Substances 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000005259 measurement Methods 0.000 title claims abstract description 31
- 238000006073 displacement reaction Methods 0.000 claims abstract description 34
- 239000000203 mixture Substances 0.000 claims abstract description 19
- 208000037656 Respiratory Sounds Diseases 0.000 claims abstract description 13
- 239000003973 paint Substances 0.000 claims abstract description 8
- 239000011148 porous material Substances 0.000 claims abstract description 8
- 238000005070 sampling Methods 0.000 claims abstract description 7
- 239000004744 fabric Substances 0.000 claims abstract description 6
- 238000009413 insulation Methods 0.000 claims abstract description 3
- 230000008569 process Effects 0.000 claims description 10
- JLQUFIHWVLZVTJ-UHFFFAOYSA-N carbosulfan Chemical compound CCCCN(CCCC)SN(C)C(=O)OC1=CC=CC2=C1OC(C)(C)C2 JLQUFIHWVLZVTJ-UHFFFAOYSA-N 0.000 claims description 5
- 238000002474 experimental method Methods 0.000 claims description 4
- 238000013461 design Methods 0.000 claims description 3
- 229920000178 Acrylic resin Polymers 0.000 claims description 2
- 239000004925 Acrylic resin Substances 0.000 claims description 2
- 238000005507 spraying Methods 0.000 claims description 2
- 229920001169 thermoplastic Polymers 0.000 claims description 2
- 239000004416 thermosoftening plastic Substances 0.000 claims description 2
- 238000012669 compression test Methods 0.000 description 12
- 230000008859 change Effects 0.000 description 9
- 230000003287 optical effect Effects 0.000 description 5
- 230000006378 damage Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- 238000009864 tensile test Methods 0.000 description 4
- 230000009466 transformation Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- PXFBZOLANLWPMH-UHFFFAOYSA-N 16-Epiaffinine Natural products C1C(C2=CC=CC=C2N2)=C2C(=O)CC2C(=CC)CN(C)C1C2CO PXFBZOLANLWPMH-UHFFFAOYSA-N 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000003776 cleavage reaction Methods 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004925 denaturation Methods 0.000 description 1
- 230000036425 denaturation Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000007017 scission Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
- G01N3/068—Special adaptations of indicating or recording means with optical indicating or recording means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/006—Crack, flaws, fracture or rupture
- G01N2203/0062—Crack or flaws
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/0641—Indicating or recording means; Sensing means using optical, X-ray, ultraviolet, infrared or similar detectors
- G01N2203/0647—Image analysis
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
Method for testing is carefully observed the invention discloses a kind of asphalt spilt test based on actual measurement geometrical morphology, is comprised the following steps：Step one：Bitumen mixture specimen is chosen, test specimen is taken out after insulation.Step 2：Interface is carefully seen in test specimen and applies one layer of thin white paint, in the pore that cloth above is sparse.Step 3：Determine the test specimen placement location of multi-functional full-automatic pitch pressure tester.Step 4：PMLAB DIC 3D instruments are assembled, measure state is set, and carries out original image sampling.Step 5：All light are closed, the test specimen of given size is loaded, until the rupture of whole test specimen.Step 6：By PMLAB DIC 3D observation of use instrument test specimen Interface Crack states, load deflection when crackle occurs in interface is obtained, strain regime when determining when crackle occurs in test specimen interface and destroying completely.The present invention can obtain the parameters such as the displacement and strain of surface of test piece whole audience every bit by system-computed.
Description
Technical field
The present invention relates to a kind of experimental test procedures, and in particular to a kind of asphalt based on actual measurement geometrical morphology is split
The thin observation method for testing of experiment is split, belongs to civil engineering strain measurement technique field.
Background technology
The mechanical property of asphalt is always study hotspot in road industry, at computer and image
Reason technology is continued to develop, and increasing road service workers put into the research to asphalt.Pitch is mixed
It is Indirect Tensile Tests (IDT, indirect tensile test) to close material diametral compression test, refers to the circle to specification given size
Cylinder test specimen, is further applied load by the circular arc press strip of one fixed width so that test specimen is diametrically cleaved until the examination of destruction
Test, deformation, indirect tensile strength, limit tensile strain, destruction stiffness modulus of asphalt etc. are measured by experiment, is passed through
The mechanical property of asphalt is evaluated the Treatment Analysis of these parameters.Due in diametral compression test, being held in the middle part of test specimen
The stress-strain state of bottom is similar during by the stress-strain state under load action to actual road surface bearing load, and splitting examination
Test simple to operate, therefore, diametral compression test is increasingly becoming the part for carrying out pavement structure and Asphalt Mixture Design, and obtains
The attention of lot of domestic and foreign scholar.
Traditional Indirect Tensile Tests of Asphalt Mixtures is generally determined test specimen using displacement transducer or displacement meter and is applying lotus
Horizontal and vertical deformation during load, is limited with fixed range, and the precision of measurement is relatively low.Meanwhile, use data acquisition
System or X-Y recorder carry out the electromotive signal of automatic data collection sensor and displacement meter, can only obtain deformation displacement data and
Load-deflection curves, can not collect the whole fracture process of test specimen, and then can not intuitively observe Crack Extension situation, tool
There is certain limitation.Traditional data collecting system is limited to the chart drive speed of register instrument, can not synchronously simulating test specimen
The change of mechanical response, efficiency is low and is also easy to produce measurement error.
The content of the invention
For shortcoming and defect of the prior art, the present invention proposes a kind of asphalt based on actual measurement geometrical morphology
Spilt test carefully observes method for testing, can accurate simulation bitumen mixture specimen Damage course, obtain test specimen from starting to be loaded into
The thin sight interface image of whole process, and the displacement in test specimen measured zone and Strain Distribution are completely severed, can be preferably
Cleavage fracture of the Research on Asphalt Mixture in set point of temperature and loading speed and the mechanical property in elastic stage.
The technical solution adopted by the present invention is：
Asphalt spilt test based on actual measurement geometrical morphology carefully observes method for testing, comprises the following steps：
Step one：Bitumen mixture specimen is chosen, is incubated according to specification in thermostatic protectiving incubator, after insulation
Test specimen is taken out to be tested.
Step 2：For the ease of measurement, according to number order, carefully see interface in test specimen and apply one layer of thin white paint, Ran Hou
The sparse pore of its cloth above.
Step 3：Determine the test specimen placement location of multi-functional full-automatic pitch pressure tester.The pitch handled well is mixed
Close material test specimen and be immediately placed in the fixture of testing stand and lay stable, test specimen lays circular arc press strip up and down, make above and below press strip side
The cross line in face is aligned with test specimen central axis, and press strip should be placed in the middle, parallel up and down.
Step 4：PMLAB DIC-3D instruments are assembled, measure state is set, and carries out original image sampling.
The purpose of original pattern sampling is occur it and test specimen in crackle with the thin sight interface during diametral compression test
Image sampling when destroying completely is contrasted, and is easy to observation Interface Crack geometric position, and read the strain value of particular location.
Described PMLAB DIC-3D are a kind of optical gauges based on contactless strain optical system.It can
By comparing the change of the three-dimensional appearance of each point in the lower measured zone of load effect, the distribution of testee whole audience three-D displacement is obtained
And Strain Distribution.For fixation measuring visual field user, with portable type measuring head.
Step 5：All light in laboratory are closed, according to the displacement interval of setting with certain loading velocity to regulation chi
Very little test specimen is loaded, untill whole test specimen ruptures.
All light in laboratory are closed, its object is to enable instrument accurately to catch the change in displacement feelings of surface of test piece
Condition, using correlation matching algorithm, obtains corresponding parallax in left and right camera collection image, from image the parallax data of each point and
The three-dimensional appearance on the calibrating parameters reconstruct bitumen mixture specimen surface being obtained ahead of time；By comparing measured zone under load action
The change of the three-dimensional appearance of interior each point, obtains the distribution of testee whole audience three-D displacement and strain variation.
Step 6：By PMLAB DIC-3D observation of use instrument test specimen Interface Crack states, obtain when crackle occurs in interface
Load deflection, strain regime when determining when crackle occurs in test specimen interface and destroying completely.
PMLAB DIC-3D instruments can be by programming Control image acquisition process, the measurement object fixed for position,
Testee can be measured with portable measurement head, without field calibration, its measurement accuracy minimum can reach
50 microstrains.This instrumental resolution is 1296 × 964pixel, and highest frame frequency reaches 30fps, and image is taken the photograph by high resolution CCD
Camera is gathered, and IMAQ speed is 5 frames/s, and image will be synchronously stored into computer and be carried out at analysis after the deformation collected
Reason.
Further scheme is：Bitumen mixture specimen requires to prepare according to the marshal piece of standard, a diameter of
101.6mm, a height of 63.5mm, recycle cutting off machine cutting sample section, form thin sight interface, and a diameter of 101.6mm is a height of
40mm。
Further scheme is：Be incubated in thermostatic protectiving incubator, refer in phase set-up procedure before the test, it is necessary to
Asphalt marshal piece is put into attemperater, and according to related specifications design temperature, constant temperature preserves half an hour
More than, further take out carry out diametral compression test.The performance what is evaluated asphalt at a temperature of should be related depending on test objective
Specification is disclosed, not within protection scope of the present invention.
Further scheme is：Then the white paint is used in the above using automatic spraying thermoplastic acrylic resin paint
The sparse pore of black marking pen cloth, the control of the distance between pore is within 10mm.Purpose is in optic test mistake
By hot spot gridding in journey, light passes through the surface for projecting test specimen test from porous grid, by not in the same time
Relative displacement is converted into the strain of test specimen.
Further scheme is：The displacement interval set is used as 0.01mm with 10mm/min loading velocity
The mode of electric loading system applies displacement load to marshal piece, untill bitumen mixture specimen ruptures, but from starting plus
Test specimen time to rupture is downloaded to very short, no more than 30s.
Beneficial effects of the present invention are as follows：
The non-contact optical measuring method that the present invention is used measures bitumen mixture specimen during diametral compression test
Surface deformation, the parameters such as the displacement and strain of surface of test piece whole audience every bit can be obtained by system-computed, tradition is compensate for
The limitation of Indirect Tensile Tests of Asphalt Mixtures measurement range；Displacement transducer need not be installed, it is to avoid using passing in measurement process
The measuring result error that human factor is caused in system diametral compression test method；The PMLAB DIC-3D instruments used in this method, can
It is easy to operate so that according to user's request, control is programmed to diametral compression test IMAQ overall process；This method can be intuitively
Observe bitumen mixture specimen whole fracture process, can preferably Research on Asphalt Mixture in set point of temperature and loading speed
When Crack Extension situation and mechanical property in elastic stage；This method is directed to the measurement object that position is fixed, Ke Yiyun
Testee is measured with portable measurement head, without field calibration, with certain flexible operating；In this method
The Instrument measuring precision used is high, and IMAQ speed is fast, and the picture quality of collection preferably, can be observed more visual and clearly
Crackle changing rule.
Brief description of the drawings
Fig. 1 is measuring system schematic diagram of the invention；
Fig. 2 is AC-25 cutting surface chart；
Fig. 3 is multi-functional full-automatic pitch pressure tester；
Fig. 4 is PMLAB DIC-3D instruments；
Fig. 5 is to investigate region and its gray value (wherein left side be subregion G1 and grey value profile before denaturation, and right side is change
Subregion G2 and grey value profile after shape)；
Fig. 6 is the fine crack that AC-25 test specimens occur when displacement load is -0.07mm；
Fig. 7 strains for AC-25 test specimens interface X to strain, Y-direction, the first principal strain cloud atlas (displacement -0.07mm)；
Fig. 8 is the penetration of cracks cloud atlas of AC-25 test specimens when displacement load is -0.19mm；
Fig. 9 is AC-25 specimen crack schematic diagrames when displacement load is -0.19mm；
Figure 10 strains for AC-25 test specimens interface X to strain, Y-direction, the first principal strain cloud atlas (displacement -0.19mm)；
Figure 11 is AC-25 specimen crack expansion process schematic diagrames.
Embodiment
In order to preferably prove the present invention feasibility, below in conjunction with the accompanying drawings with instantiation to the present invention based on actual measurement
The asphalt spilt test of geometrical morphology is carefully observed method for testing and is further described.
Bituminous concrete AC-25 is bituminous paving cutting optimal common used material, of the invention by taking bituminous concrete AC-25 as an example,
The introduction of detailed embodiment is carried out to thin sight diametral compression test method of the AC-25 asphalts based on actual measurement geometrical morphology.
Step one：According to standard marshal piece requirement prepare AC-25 bitumen mixture specimens, a diameter of 101.6mm,
A height of 63.5mm, recycles cutting off machine cutting sample section, forms thin sight interface, a diameter of 101.6mm, a height of 40mm.Press
According to, it is necessary to which AC-25 asphalts are put into attemperater, this example is set in code requirement before the test phase set-up procedure
Test temperature is 25 DEG C, and constant temperature is preserved more than half an hour, further takes out test specimen and carries out diametral compression test.Cutting circle of AC-25 test specimens
Meet personally Fig. 2.
Step 2：For the ease of measurement, according to number order, carefully see interface in AC-25 test specimens and apply one layer of thin white paint, so
The sparse pore of cloth in the above afterwards.Purpose is that during optic test, by hot spot gridding, light is porous from one
Grid pass through the surface for projecting test specimen test, by it is different when relative displacement be converted into the strain of AC-25 test specimens.
Step 3：Determine the test specimen placement location of multi-functional full-automatic pitch pressure tester.Full-automatic pitch pressure examination
Test instrument and see Fig. 3.The AC-25 bitumen mixture specimens handled well are immediately placed in the fixture of testing stand and lay stable, on test specimen
Under lay circular arc press strip, make side cross rule alignment, press strip should be placed in the middle, parallel up and down.
Step 4：PMLAB DIC-3D instruments are assembled, measure state is set, and carry out original image sampling, its purpose exists
Contrasted in by its image sampling with the thin sight interface during diametral compression test when crackle occurs and test specimen is destroyed completely,
It is easy to observation Interface Crack geometric position, and reads the strain value of particular location.
Described PMLAB DIC-3D are shown in Fig. 4, are a kind of optical gauges based on contactless strain optical system.
It can be demarcated using the scaling board by verification to binocular camera system, obtain the inside and outside parameter of two cameras；Utilize
Correlation matching algorithm, obtains the parallax of corresponding points in left and right camera collection image, the parallax data of each point and in advance from image
The calibrating parameters of acquisition rebuild the three-dimensional appearance of body surface；By the three-dimensional shaped for comparing each point in the lower measured zone of load effect
The change of looks, obtains the distribution of testee whole audience three-D displacement and Strain Distribution.
The principle of correlation matching algorithm is the grey value profile in adjacent isles region in the local tiny area of tracking mark,
Transformation parameter is determined by Distribution Value, and then the coordinate after deformation is obtained by the regional area coordinate identified.Described on the left of Fig. 5
The local tiny area that " matts " is provided is set to G1, its grey value profile is G1(x, y), in the presence of stress, zonule changes
G in being changed on the right side of Fig. 52, the grey value profile after deformation is G2(x,y)。
Due to the effect of load, the regional area coordinate (x, y) of mark is changed into (xt,yt), using pseudo- affine transformation：
xt(a0,a1,a2,a3, x, y) and=a0+a1x+a2y+a3xy
yt(a4,a5,a6,a7, x, y) and=a4+a5x+a6y+a7xy (1)
Wherein t represents change over time, and the regional area coordinate of mark changes, therefore coordinate value xtAnd ytTable
Show the identified areas coordinate value of t.
Related algorithm transformation parameter is (a0,a1,a2,a3,a4,a5,a6,a7), these parameters are used as the normal system in algorithm
Number, dimensionless.If grey value profile originally is G1(x, y), the grey value profile after conversion is G2(x,y).Utilize coordinate transform
(xt,yt) and Photogrammetry be modified, have
Gt(x, y)=g0+g1G1(xt(x,y),yt(x,y)) (2)
In formula：g0, g1For lighting parameter, value is determined according to specific illuminations, belongs to dimensionless group；Gt(x, y) is
Revised grey value profile.
According to (3) formula minimizing, you can determine transformation parameter a0, a1, etc..Related algorithm makes before and after deformation
Matching precision reaches 0.01 pixel.
Step 5：Close all light in laboratory so that instrument can accurately catch the change in displacement situation of surface of test piece,
According to the displacement interval 0.01mm of setting, AC-25 test specimens are applied by the way of electric loading system with 10mm/min loading velocity
Plus displacement load, untill test specimen ruptures.
Step 6：By PMLAB DIC-3D observation of use instrument AC-25 test specimen Interface Crack states, obtain interface and crackle occur
When load deflection, determine when crackle occurs in test specimen interface and completely destruction when strain regime.This instrumental resolution is 1296
× 964pixel, highest frame frequency reaches 30fps, and image is by high resolution CCD camera acquisition, and IMAQ speed is 5 frames/s,
Image will be synchronously stored into computer and be analyzed and processed after the deformation collected.
According to PMLAB DIC-3D observation of use instrument, being loaded into -0.07mm, (negative sign represents that direction is at AC-25 test specimens interface
When downwards), its interface upper and lower ends produce fine crack, as shown in fig. 6, but artificially not observing the small of its interface now and splitting
Line, instrument can be taken by front and rear frame the change contrast of image obtain test specimen AC-25 test specimens occur the displacement load of crackle for-
0.07mm.Now AC-25 test specimens interface upper and lower ends cracks X, Y and the first principal strain maximum are as shown in table 1, above and below interface
At two ends X to strain, Y-direction strain, first principal strain cloud atlas such as Fig. 7.
The interface strain state of table 1 (displacement -0.07mm)
When AC-25 test specimens are loaded into -0.19mm, its interface produces larger crackle, in fig. 8 it can be seen that macroscopic view is split
Seam, now the penetration of cracks schematic diagram of surface of test piece is shown in Fig. 9.Now, X, Y of AC-25 test specimens middle crack and the first principal strain
Maximum is shown in Table 2, and interface middle crack X is strained and the first principal strain such as Figure 10 to strain, Y-direction.In addition, can according to IMAQ
It is as shown in figure 11 with the crack propagation process for obtaining AC-25 interfaces.
Strain regime (displacement -0.19mm) during 2 macrocrack of table
Wherein εxRepresent the strain of x directions, εyRepresent the strain of y directions, ε1The first principal strain is represented, unit is μ ε (micro- to answer
Become).
Pass through the analysis of above case, it can be deduced that to draw a conclusion：Asphalt splitting based on actual measurement geometrical morphology
The thin observation method for testing of experiment can analyze crack propagation path of the asphalt in diametral compression test well, can be preferably
Crack Extension situation of the Research on Asphalt Mixture in set point of temperature and loading speed and the mechanical property in elastic stage, together
When can also directly obtain displacement and the Strain Distribution cloud atlas in test specimen measured zone.Displacement sensing need not be installed in measurement process
Device, is reduced because the strain measurement error that human factor is caused.
Although reference be made herein to invention has been described for explanatory embodiment of the invention, and above-described embodiment is only this hair
Bright preferably embodiment, embodiments of the present invention are simultaneously not restricted to the described embodiments, it should be appreciated that people in the art
Member can be designed that a lot of other modification and embodiment, and these modifications and embodiment will fall in principle disclosed in the present application
Within scope and spirit.
Claims (5)
1. the asphalt spilt test based on actual measurement geometrical morphology carefully observes method for testing, it is characterised in that including following step
Suddenly：
Step one：Bitumen mixture specimen is chosen, is incubated according to specification in thermostatic protectiving incubator, is taken out after insulation
Test specimen is tested；
Step 2：For the ease of measurement, according to number order, carefully see interface in test specimen and apply one layer of thin white paint, then thereon
The sparse pore of face cloth；
Step 3：Determine the test specimen placement location of multi-functional full-automatic pitch pressure tester；By the asphalt handled well
Test specimen, which is immediately placed in the fixture of testing stand, lays stable, test specimen lays circular arc press strip up and down, make above and below press strip side
Cross line is aligned with test specimen central axis, and press strip should be placed in the middle, parallel up and down；
Step 4：PMLAB DIC-3D instruments are assembled, measure state is set, and carries out original image sampling；
Step 5：All light in laboratory are closed, according to the displacement interval of setting with certain loading velocity to given size
Test specimen is loaded, untill whole test specimen ruptures；
Step 6：By PMLAB DIC-3D observation of use instrument test specimen Interface Crack states, loading when crackle occurs in interface is obtained
Displacement, strain regime when determining when crackle occurs in test specimen interface and destroying completely；
PMLAB DIC-3D instruments can be used by programming Control image acquisition process, the measurement object fixed for position
Portable measurement head is measured to testee, without field calibration, its measurement accuracy minimum can reach 50 it is micro- should
Become；This instrumental resolution is 1296 × 964pixel, and highest frame frequency reaches 30fps, and image is adopted by high resolution CCD video camera
Collection, IMAQ speed is 5 frames/s, and image will be synchronously stored into computer and be analyzed and processed after the deformation collected.
2. the asphalt spilt test according to claim 1 based on actual measurement geometrical morphology carefully observes method for testing, it is special
Levy and be：Bitumen mixture specimen requires to prepare according to the marshal piece of standard, a diameter of 101.6mm, a height of 63.5mm, then
Using cutting off machine cutting sample section, thin sight interface, a diameter of 101.6mm, a height of 40mm are formed.
3. the asphalt spilt test according to claim 1 based on actual measurement geometrical morphology carefully observes method for testing, it is special
Levy and be：It is incubated, is referred in phase set-up procedure before the test, it is necessary to by asphalt Marshall in thermostatic protectiving incubator
Test specimen is put into attemperater, and according to related specifications design temperature, constant temperature preserves more than half an hour, further takes out and cleaved
Experiment.
4. the asphalt spilt test according to claim 1 based on actual measurement geometrical morphology carefully observes method for testing, it is special
Levy and be：The white paint is then sparse with black marking pen cloth in the above using automatic spraying thermoplastic acrylic resin paint
Pore, the control of the distance between pore is within 10mm.
5. the asphalt spilt test according to claim 1 based on actual measurement geometrical morphology carefully observes method for testing, it is special
Levy and be：The displacement interval set as 0.01mm, with 10mm/min loading velocity by the way of electric loading system to horse
Xie Er test specimens apply displacement load, untill bitumen mixture specimen ruptures, but from starting to be loaded into test specimen time to rupture very
It is short, no more than 30s.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107907415A (en) * | 2017-11-29 | 2018-04-13 | 中国电建集团成都勘测设计研究院有限公司 | The test specimen of rock mass Toppling Deformation failure test is induced for discontinuously steep slow crack |
| CN109827837A (en) * | 2019-01-11 | 2019-05-31 | 东南大学 | Damage and Fracture performance value tests predictor method under a kind of heat regeneration asphalt mixture tension and compression state |
| CN110031322A (en) * | 2019-04-22 | 2019-07-19 | 许昌学院 | Accelerated fatigue test system is emulated for bituminous pavement |
| CN110057399A (en) * | 2019-03-28 | 2019-07-26 | 东南大学 | A kind of temperature field based on 3D-DIC and displacement field synchronized measurement system and measurement method |
| CN113588449A (en) * | 2021-06-10 | 2021-11-02 | 中南大学 | Method for testing dynamic fracture expansion toughness of brittle material |
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| CN109827837B (en) * | 2019-01-11 | 2021-09-03 | 东南大学 | Method for estimating damage fracture performance numerical test of hot recycled asphalt mixture in tension and compression state |
| CN110057399A (en) * | 2019-03-28 | 2019-07-26 | 东南大学 | A kind of temperature field based on 3D-DIC and displacement field synchronized measurement system and measurement method |
| CN110031322A (en) * | 2019-04-22 | 2019-07-19 | 许昌学院 | Accelerated fatigue test system is emulated for bituminous pavement |
| CN113588449A (en) * | 2021-06-10 | 2021-11-02 | 中南大学 | Method for testing dynamic fracture expansion toughness of brittle material |
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