CN107063903A - A kind of experimental rig for assessing Thermal Crack of Asphalt - Google Patents
A kind of experimental rig for assessing Thermal Crack of Asphalt Download PDFInfo
- Publication number
- CN107063903A CN107063903A CN201710210664.4A CN201710210664A CN107063903A CN 107063903 A CN107063903 A CN 107063903A CN 201710210664 A CN201710210664 A CN 201710210664A CN 107063903 A CN107063903 A CN 107063903A
- Authority
- CN
- China
- Prior art keywords
- pressure head
- test specimen
- asphalt
- fixture
- experimental rig
- Prior art date
Links
- 239000010426 asphalt Substances 0.000 title claims abstract description 27
- 230000005540 biological transmission Effects 0.000 claims abstract description 24
- 238000006073 displacement reactions Methods 0.000 claims abstract description 13
- 239000010410 layers Substances 0.000 claims description 4
- 230000001276 controlling effects Effects 0.000 claims description 3
- 239000000203 mixtures Substances 0.000 description 4
- 238000005336 cracking Methods 0.000 description 3
- 239000000463 materials Substances 0.000 description 3
- 280000312338 Pavement companies 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005516 engineering processes Methods 0.000 description 2
- 238000000034 methods Methods 0.000 description 2
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 239000011230 binding agents Substances 0.000 description 1
- 230000000875 corresponding Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 238000004826 seaming Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000002344 surface layers Substances 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
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
- G01N3/38—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by electromagnetic 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
- G01N2203/0001—Type of application of the stress
- G01N2203/0005—Repeated or cyclic
-
- 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
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
-
- 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
- G01N2203/003—Generation of the force
- G01N2203/005—Electromagnetic 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
- G01N2203/0067—Fracture or rupture
-
- 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
- G01N2203/022—Environment of the test
- G01N2203/0222—Temperature
- G01N2203/0228—Low temperature; Cooling means
Abstract
Description
Technical field
The invention belongs to pitch test equipment field, it is related to a kind of experiment dress for assessing Thermal Crack of Asphalt Put.
Background technology
The cold cracking of bituminous paving is one of principal mode of pavement destruction, widely distributed, and harm is serious.Bituminous paving The reason for cold cracking is diversified, and the principal element of influence crack severity has：The property of pitch and asphalt Matter, the composition of asphalt, surface layer and the bonding state of basic unit, the property of base material, Pavement Structure Combination, structure sheaf The internal factor and weather conditions, rate of temperature fall, the volume of traffic and type of vehicle and construction factor etc. such as modulus and thickness are outside Factor.Fatigue rupture, rut and cold cracking are the generally acknowledged failure criteria of bituminous paving rupture.
The method of research Load materials cryogenic property is more at present, and pitch is with modified asphalt binders frequently with bending creep Beam (BBR), uniaxial direct tensile (DT) test method, pitch are then answered with modified asphalt mixture frequently with low-temperature bending, constraint temperature The methods such as power, dynamic shear test.In recent years, pitch and asphalt are carried out using linear elastic fracture mechanics theoretical (LEFM) The research of cryogenic property increases increasingly, and research shows that the theory can reveal that the freezing crack characteristic and rule of material, but existing Having in technology does not have a kind of experimental rig, and the experimental rig is capable of the dress of accurate evaluation pitch Thermal Crack of Asphalt Put.
The content of the invention
Asphalt Mixture at Low Temperature is assessed it is an object of the invention to the shortcoming for overcoming above-mentioned prior art there is provided one kind to resist The experimental rig of fragility energy, the experimental rig being capable of accurate evaluation Thermal Crack of Asphalt.
To reach above-mentioned purpose, the experimental rig of assessment Thermal Crack of Asphalt of the present invention includes ring Border case, control cabinet, moving beam, bearing, fixture, pressure head, two power transmission shafts, the pressure biographies for detecting the pressure that pressure head is subject to Sensor, the displacement transducer of displacement for detecting pressure head and the temperature sensor for detecting environmental cabinet internal temperature, its In, bearing and fixture are located in environmental cabinet；
Environmental cabinet is located on control cabinet, and two power transmission shafts, which are erect, to be fixed on control cabinet, and environmental cabinet is located at two transmissions Between axle, moving beam is located between two power transmission shafts, and moving beam and two power transmission shafts constitute screw-nut body, branch Seat is arranged on the bottom of environmental cabinet, and fixture is arranged on bearing, and the upper surface of fixture is provided with two support blocks, test specimen position to be measured In in two support blocks, pressure head is vertically distributed, and the upper end of pressure head is connected with moving beam, and the lower end of pressure head is inserted in In environmental cabinet, pressure head just treats test block, and projection of the pressure head on fixture is located between two support blocks, provided with control in control cabinet Device and servomotor processed, the output shaft of servomotor are connected with two power transmission shafts, the output end of controller and temperature sensor, The control end of the output end of pressure sensor, the output end of displacement transducer and servomotor is connected.
Two test specimen folders are fixed with fixture, the two ends of test specimen to be measured are held on two test specimen folders respectively.
Erect on fixture and be fixed with two columns, wherein, one test specimen folder of a column correspondence, one end socket of test specimen folder And be fixed on column, the other end of test specimen folder is held on test specimen to be measured.
Tack coat is provided between test specimen and test specimen folder to be measured.
The bottom of fixture is provided with positioning head, and the upper surface of bearing offers the locating slot being engaged with positioning head.
Also include fixed cross beam, wherein, the two ends of fixed cross beam are flexibly connected with two power transmission shafts respectively.
Display, power switch and the chain of command for controlling servomotor and environmental cabinet are provided with the outer wall of control cabinet Plate, display and control panel are connected with controller.
It is connected through a screw thread between the upper end of pressure head and moving beam.
The lower surface of pressure head is covered with rubber layer on semicircular structure, and the lower surface of pressure head.
The invention has the advantages that：
The experimental rig of the present invention for assessing Thermal Crack of Asphalt is in concrete operations, and pressure head is treated The pressure testing process of test block is carried out in environmental cabinet, so that experimental enviroment is closer to actual environment；Pass through servo electricity simultaneously Machine drives transmission shaft driven, and power transmission shaft drives moving beam to move up and down, and moving beam band dynamic head treats test block and carries out lotus The loading and unloading of load, are rolled so as to simulate test specimen to be measured in actual environment by wheel, and it is continuous to treat test block by pressure head Carry out load loading and unloading, until test specimen to be measured be destroyed untill, then according to the number of times of loading, the size of loading force and Displacement in the middle part of test specimen to be measured before and after destruction carries out the assessment of Thermal Crack of Asphalt, simple in construction, easy to operate, Practicality is extremely strong, and result of the test is closer to reality, and accuracy is higher.
Brief description of the drawings
Fig. 1 is structural representation of the invention；
Fig. 2 presss from both sides 4 structural representation for test specimen in the present invention；
Fig. 3 is the structural representation of fixture 11 in the present invention.
Wherein, 1 be power switch, 2 be display, 3 be bearing, 4 be test specimen folder, 5 be test specimen to be measured, 6 be moving beam, 7 it is fixed cross beam, 8 be power transmission shaft, 9 be pressure head, 10 be environmental cabinet, 11 be fixture, 12 be control panel, 13 is positioning head, 14 It is column for control cabinet, 15,16 is support block.
Embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings：
With reference to Fig. 1, Fig. 2 and Fig. 3, the experimental rig of assessment Thermal Crack of Asphalt of the present invention includes Environmental cabinet 10, control cabinet 14, moving beam 6, bearing 3, fixture 11, pressure head 9, two power transmission shafts 8, for detect pressure head 9 by The pressure sensor of pressure, the displacement transducer of displacement for detecting pressure head 9 and for detecting the inside of environmental cabinet 10 temperature The temperature sensor of degree, wherein, bearing 3 and fixture 11 are located in environmental cabinet 10；Environmental cabinet 10 is located on control cabinet 14, two biographies Moving axis 8, which is erect, to be fixed on control cabinet 14, and environmental cabinet 10 is located between two power transmission shafts 8, and moving beam 6 is located at two transmissions Between axle 8, and moving beam 6 and two power transmission shafts 8 constitute screw-nut body, and bearing 3 is arranged at the bottom of environmental cabinet 10 On, fixture 11 is arranged on bearing 3, and the upper surface of fixture 11 is provided with two support blocks 16, and test specimen 5 to be measured is located at two support blocks On 16, pressure head 9 is vertically distributed, and the upper end of pressure head 9 is connected with moving beam 6, and the lower end of pressure head 9 is inserted in environmental cabinet In 10, pressure head 9 is just treating test block 5, and projection of the pressure head 9 on fixture 11 is located between two support blocks 16, in control cabinet 14 Provided with controller and servomotor, the output shaft of servomotor is connected with two power transmission shafts 8, controller and temperature sensor Output end, the output end of pressure sensor, the control end of the output end of displacement transducer and servomotor are connected.
Two test specimen folders 4 are fixed with fixture 11, the two ends of test specimen 5 to be measured are held on two test specimen folders 4 respectively；Fixture Erect on 11 and be fixed with two columns 15, wherein, one test specimen folder 4 of a correspondence of column 15, one end of test specimen folder 4 is socketed and consolidated Due on column 15, the other end of test specimen folder 4 is held on test specimen 5 to be measured；Provided with bonding between test specimen 5 and test specimen folder 4 to be measured Layer.
The bottom of fixture 11 is provided with positioning head 13, and the upper surface of bearing 3 offers the locating slot being engaged with positioning head 13.
Present invention additionally comprises fixed cross beam 7, wherein, the two ends of fixed cross beam 7 are flexibly connected with two power transmission shafts 8 respectively； It is connected through a screw thread between the upper end of pressure head 9 and moving beam 6；The lower surface of pressure head 9 is under semicircular structure, and pressure head 9 Covered with rubber layer on end face.
Display 2, power switch 1 are provided with the outer wall of control cabinet 14 and for controlling servomotor and environmental cabinet 10 Control panel 12, display 2 and control panel 12 are connected with controller.
The present invention specific operation process be：
Cutting obtains the test specimen to be measured 5 of corresponding size from indoor shaping rut plate or actual road surface, then by test specimen 5 to be measured It is connected with test specimen folder 4, test specimen folder 4 is fixed on column 15, then fixture 11 is positioned on bearing 3, user passes through control Panel 12 processed sets temperature, the default load of pressure head 9 and the loading speed of environmental cabinet 10；Environmental cabinet 10 is then turned on, is made to be measured Test specimen 5 is incubated in environmental cabinet 10；
Controller drives moving beam 6 up and down reciprocatingly according to the default load and loading speed of pressure head 9 by servomotor It is mobile, so as to be moved back and forth up and down with dynamic head 9, and then loading and unloading that test block 5 carries out load are treated by pressure head 9, Untill test specimen 5 to be measured is destroyed；Then the stress loss factor alpha of test specimen 5 to be measured and strain loss coefficient β are respectively：Wherein, n is the total degree of load loading when test specimen 5 to be measured is destroyed, and F is the size that pressure head 9 presets load, D is the vertical displacement of the impingement position of 5 seaming chuck of test specimen 9 to be measured before and after test specimen 5 to be measured is destroyed, then answering according to test specimen 5 to be measured Power loss coefficient α and strain loss coefficient β characterize Thermal Crack of Asphalt.
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710210664.4A CN107063903A (en) | 2017-03-31 | 2017-03-31 | A kind of experimental rig for assessing Thermal Crack of Asphalt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710210664.4A CN107063903A (en) | 2017-03-31 | 2017-03-31 | A kind of experimental rig for assessing Thermal Crack of Asphalt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107063903A true CN107063903A (en) | 2017-08-18 |
Family
ID=59603286
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710210664.4A CN107063903A (en) | 2017-03-31 | 2017-03-31 | A kind of experimental rig for assessing Thermal Crack of Asphalt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107063903A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108613913A (en) * | 2018-06-15 | 2018-10-02 | 长安大学 | The experimental rig and method of asphalt permeability performance under load-souring |
| CN108627402A (en) * | 2018-05-09 | 2018-10-09 | 哈尔滨工业大学 | A kind of test equipment and method of analysis pitch freezing crack performance |
| CN109001440A (en) * | 2018-08-08 | 2018-12-14 | 同济大学 | A method of test concrete antifreezing fragility can |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101216393A (en) * | 2007-12-28 | 2008-07-09 | 保定天威集团有限公司 | Self-adhering transposed conductor integral high-temperature bending strength experimental method and apparatus |
| CN201440120U (en) * | 2009-06-02 | 2010-04-21 | 交通部公路科学研究所 | Test device for tensile test of force-transferring rod |
| CN201497676U (en) * | 2009-01-12 | 2010-06-02 | 攀钢集团研究院有限公司 | Bending fixture used for prefabricating fatigue crack |
| CN201897542U (en) * | 2010-11-24 | 2011-07-13 | 浙江吉利汽车研究院有限公司 | Fatigue performance testing device for small-dimensional materials |
| CN103076238A (en) * | 2012-12-28 | 2013-05-01 | 长沙理工大学 | Testing device and method for bend-shear performance of asphalt mixture |
| CN103234825A (en) * | 2013-04-12 | 2013-08-07 | 长安大学 | Pavement material direct tensile test apparatus with eccentric tension avoided and method thereof |
| CN204027798U (en) * | 2014-08-22 | 2014-12-17 | 江阴市产品质量监督检验所 | A kind of simple and easy falling-ball impact test device |
| CN205192874U (en) * | 2015-10-17 | 2016-04-27 | 山东路达试验仪器有限公司 | Bituminous mixture bending creep test device |
| CN205898586U (en) * | 2016-07-14 | 2017-01-18 | 山西省交通科学研究院 | Bituminous mixture bending test testing arrangement |
-
2017
- 2017-03-31 CN CN201710210664.4A patent/CN107063903A/en not_active Application Discontinuation
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101216393A (en) * | 2007-12-28 | 2008-07-09 | 保定天威集团有限公司 | Self-adhering transposed conductor integral high-temperature bending strength experimental method and apparatus |
| CN201497676U (en) * | 2009-01-12 | 2010-06-02 | 攀钢集团研究院有限公司 | Bending fixture used for prefabricating fatigue crack |
| CN201440120U (en) * | 2009-06-02 | 2010-04-21 | 交通部公路科学研究所 | Test device for tensile test of force-transferring rod |
| CN201897542U (en) * | 2010-11-24 | 2011-07-13 | 浙江吉利汽车研究院有限公司 | Fatigue performance testing device for small-dimensional materials |
| CN103076238A (en) * | 2012-12-28 | 2013-05-01 | 长沙理工大学 | Testing device and method for bend-shear performance of asphalt mixture |
| CN103234825A (en) * | 2013-04-12 | 2013-08-07 | 长安大学 | Pavement material direct tensile test apparatus with eccentric tension avoided and method thereof |
| CN204027798U (en) * | 2014-08-22 | 2014-12-17 | 江阴市产品质量监督检验所 | A kind of simple and easy falling-ball impact test device |
| CN205192874U (en) * | 2015-10-17 | 2016-04-27 | 山东路达试验仪器有限公司 | Bituminous mixture bending creep test device |
| CN205898586U (en) * | 2016-07-14 | 2017-01-18 | 山西省交通科学研究院 | Bituminous mixture bending test testing arrangement |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108627402A (en) * | 2018-05-09 | 2018-10-09 | 哈尔滨工业大学 | A kind of test equipment and method of analysis pitch freezing crack performance |
| CN108613913A (en) * | 2018-06-15 | 2018-10-02 | 长安大学 | The experimental rig and method of asphalt permeability performance under load-souring |
| CN109001440A (en) * | 2018-08-08 | 2018-12-14 | 同济大学 | A method of test concrete antifreezing fragility can |
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Application publication date: 20170818 |