CN102109435A - Test piece position fixing device in asphalt mixture local three-axis creep test - Google Patents
Test piece position fixing device in asphalt mixture local three-axis creep test Download PDFInfo
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- CN102109435A CN102109435A CN 201010597871 CN201010597871A CN102109435A CN 102109435 A CN102109435 A CN 102109435A CN 201010597871 CN201010597871 CN 201010597871 CN 201010597871 A CN201010597871 A CN 201010597871A CN 102109435 A CN102109435 A CN 102109435A
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Abstract
The invention relates to a fixing device for accurately fixing the position of a mixture test piece in an asphalt mixture local three-axis creep test. The device can be formed by assembling two identical semicircular basic parts, wherein the internal diameter of a round side wall of each semicircular basic part is the same as the diameter of the mixture test piece, so that the mixture test piece just can be put into the device; the diameter of a through hole of a base plate is the same as that of a loading base, so that the base just can pass through the through hole; and the asphalt mixture test piece is put into the device, the base enters the through hole of the fixing device and contacts the bottom of the test piece, the fixing device is moved downwards, and is disassembled into the two semicircular parts and moved away after the bottom of the test piece is separated from the fixing device, and a pressure head is moved downwards to contact the upper surface of the test piece, so that the pressure head can be accurately loaded to the center of the test piece, and the accuracy of a test result is prevented from being influenced by the eccentric compression of the test piece.
Description
Technical field
The present invention relates to the local three axis creep test test specimen of a kind of asphalt position fixing apparatus.
Background technology
Along with the fast development of national economy, China Higher level highway mileage is also growing with each passing day, and wherein bituminous pavement has occupied leading position because advantages such as it is comfortable, noise reduction are widely used.Yet along with the increase of traffic volume of highway and increasing of heavy-duty vehicle, rut has become one of main disease of bituminous pavement, has a strong impact on road surface traffic safety and comfortableness, and the rut of asphalt highway has become people's question of common concern.The generation of rut mainly is because asphalt produces under the hot conditions compaction deformation and flow deformation cause, therefore, the high temperature deformation performance of asphalt has obtained domestic and international road worker's close attention, and many asphalt high temperature deformation test methods are arisen at the historic moment.
At present, asphalt high temperature deformation shop experiment both domestic and external mainly comprises single shaft static load, dynamic load, the repeated-load test of cylinder specimen, three static loads, dynamic load, repeated-load test, local three static loads, dynamic load, repeated-load test, the static load of simple shear, dynamic load, repeated-load test, the bending creep test that also has prismatic beam test specimen, the wheel tracking test of rut plate.Wherein, the local three axis creep test of cylinder specimen is a kind of novel triaxial test method.It is different with conventional three axis creep test, and lateral restriction is provided by asphalt itself, and this lateral restriction can change the lateral force situation on realistic road surface because of the performance of asphalt, the size and the variation of temperature of load.The lateral restriction of ordinary triaxial test is fixed and the lateral force situation on actual road surface is not inconsistent.Simultaneously, local three axis creep test can overcome the ordinary triaxial test confined pressure and apply difficulty, needs airtight triaxial chamber, and testing equipment is required high shortcoming.As can be seen, local three axis creep test has improved the shortcoming of ordinary triaxial test again when having inherited the ordinary triaxial test advantage, is a very outstanding test method.The bitumen mixture specimen height that local three axis creep test adopts is that 80mm, diameter are 150mm, and test specimen can obtain by the height 170mm of cutting gyratory compaction moulding, the test specimen of diameter 150mm.Local triaxial test base and pressure head diameter are 75mm.
In the local three axis creep test process of asphalt, need to guarantee that the pressure head of diameter 75mm accurately is loaded into the center of the bitumen mixture specimen upper surface of diameter 150mm, the high temperature deformation performance that could test asphalt exactly.If the loading position of pressure head has skew slightly, will cause the eccentric compression of test specimen, have a strong impact on accuracy of experimental results.Yet, test specimen need testing crew it is put in the triaxial chamber and fixedly the test specimen position accurately be loaded into test specimen upper surface center to guarantee pressure head, this process is to go to determine fully with leaning on test operation personnel subjectivity at present.Because testing crew can not vertically be overlooked in the process of test specimen stationkeeping, bigger apart from the angle of vertical head-down position deflection, because making test specimen produce eccentric compression, the error at visual angle influences this accuracy of experimental results probably.Therefore, how fixedly to make pressure head accurately be carried in test specimen upper surface center be problem demanding prompt solution in the position of test specimen exactly.
Summary of the invention
Technical matters:For accurate fixedly test specimen position in the local three axis creep test process of asphalt, avoid test specimen to produce eccentric compression, the invention provides a kind of test specimen position fixing apparatus, this device can be accurately fixing test specimen position, make pressure head accurately be carried in test specimen upper surface center.
Technical scheme:The local three axis creep test test specimen of asphalt of the present invention position fixing apparatus is assembled into by two identical semicircle basic elements of character, the centre of this semicircle basic element of character is a through hole, it is L shaped structure that circular side wall and chassis constitute an xsect, on an xsect on chassis, be provided with a blind hole, on another xsect on chassis, be provided with a connecting pin that matches with blind hole, blind hole in semicircle basic element of character matches with the connecting pin in another semicircle basic element of character, is assembled into a complete position fixing apparatus.
In the described position fixing apparatus, the interior diameter of circular side wall is identical with the bitumen mixture specimen diameter, is 150mm, can put into the compound test specimen just; The through-hole diameter on chassis is identical with base diameter, is 75mm, can base be passed;
The circular side wall that described position fixing apparatus height is 20mm can be easily fixing compound test specimen.
Beneficial effect:The invention has the beneficial effects as follows: can be in the local three axis creep test process of asphalt the accurate fixing position of test specimen, make pressure head accurately be carried in test specimen upper surface center, avoid test specimen to produce eccentric compression, and for convenience detach, do not influence the carrying out of test.
Description of drawings
Fig. 1 is the semicircle basic element of character of the local three axis creep test test specimen of asphalt position fixing apparatus
Schematic three dimensional views.
Fig. 2 be after the local three axis creep test assembling of asphalt circular test specimen position fixing apparatus three
The dimension synoptic diagram.
Wherein have: through hole 1, chassis 2, blind hole 21, connecting pin 22, sidewall 3.
Embodiment
The local three axis creep test test specimen of asphalt of the present invention position fixing apparatus is assembled into by two identical semicircle basic elements of character, the centre of this semicircle basic element of character is a through hole 1, it is L shaped structure that circular side wall 3 constitutes an xsect with chassis 2, on an xsect on chassis 2, be provided with a blind hole 21, on another xsect on chassis 2, be provided with a connecting pin 22 that matches with blind hole 21, blind hole 21 in semicircle basic element of character matches with the connecting pin 22 in another semicircle basic element of character, is assembled into a complete position fixing apparatus.
The employing stainless steel processes the semicircle basic element of character of the local three axis creep test test specimen of two asphalts position fixing apparatus, and two semicircular feature are assembled into circular test specimen position fixing apparatus.Its circular side wall interior diameter is 150mm, and can put into diameter just is the compound test specimen of 150mm; Through-hole diameter is 75mm, and can make diameter just is that the base of 75mm passes; Wall thickness 10mm, the wall height is 20mm, can be easily fixing compound test specimen; Chassis thickness is 10mm.In the process of the test, bitumen mixture specimen is put into this device, and put into triaxial chamber, make base enter the chassis through hole of stationary installation and touch test specimen bottom, move down stationary installation, treat after test specimen bottom and stationary installation break away from stationary installation to be disassembled into two semicircular feature and to remove, move down pressure head then and touch the test specimen upper surface, can make pressure head accurately be loaded into the test specimen center, avoiding test specimen to produce eccentric compression influences accuracy of experimental results.
The test specimen stationary installation is made
Adopt stainless steel to process the semicircle basic element of character of the local three axis creep test test specimen of two asphalts position fixing apparatus, and be assembled into circular test specimen position fixing apparatus.The circular side wall interior diameter is 150mm, and can put into diameter just is the compound test specimen of 150mm; Through-hole diameter is 75mm, and can make diameter just is that the base of 75mm passes; Wall thickness 10mm, the wall height is 20mm, can be easily fixing compound test specimen; Chassis thickness is 10mm.
Operation steps
In the process of the test, the semicircle basic element of character of two the local three axis creep test test specimen of asphalt position fixing apparatus, and be assembled into circular test specimen position fixing apparatus.Bitumen mixture specimen is put into this device, and put into triaxial chamber, make base enter the through hole of stationary installation and touch test specimen bottom, move down stationary installation, treat after test specimen bottom and stationary installation break away from stationary installation to be disassembled into two semicircular feature and to remove, move down pressure head then and touch the test specimen upper surface, can make pressure head accurately be loaded into the test specimen center, avoid test specimen to produce eccentric compression.
Claims (3)
1. the local three axis creep test test specimen of asphalt position fixing apparatus, it is characterized in that this stationary installation is assembled into by two identical semicircle basic elements of character, the centre of this semicircle basic element of character is through hole (1), it is L shaped structure that sidewall (3) constitutes an xsect with chassis (2), on an xsect of chassis (2), be provided with a blind hole (21), on another xsect of chassis (2), be provided with a connecting pin (22) that matches with blind hole (21), blind hole (21) in semicircle basic element of character matches with the connecting pin (22) in another semicircle basic element of character, is assembled into a complete position fixing apparatus.
2. the local three axis creep test test specimen of asphalt according to claim 1 position fixing apparatus, it is characterized in that in the described position fixing apparatus, the interior diameter of sidewall (3) is identical with the bitumen mixture specimen diameter, is 150mm, can put into the compound test specimen just; The through-hole diameter on chassis (2) is identical with base diameter, is 75mm, can base be passed.
3. the local three axis creep test test specimen of asphalt according to claim 1 position fixing apparatus, it is characterized in that sidewall that described position fixing apparatus height is 20mm can be easily fixing compound test specimen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010597871 CN102109435A (en) | 2010-12-21 | 2010-12-21 | Test piece position fixing device in asphalt mixture local three-axis creep test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010597871 CN102109435A (en) | 2010-12-21 | 2010-12-21 | Test piece position fixing device in asphalt mixture local three-axis creep test |
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| Publication Number | Publication Date |
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| CN102109435A true CN102109435A (en) | 2011-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201010597871 Pending CN102109435A (en) | 2010-12-21 | 2010-12-21 | Test piece position fixing device in asphalt mixture local three-axis creep test |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105738231A (en) * | 2016-05-11 | 2016-07-06 | 哈尔滨工业大学 | MTS-loading based bituminous mixture fatigue test unit |
| CN106370529A (en) * | 2016-08-30 | 2017-02-01 | 江苏中路工程技术研究院有限公司 | Annular direct shear test device and testing method of asphalt mixture |
| CN110501230A (en) * | 2018-05-16 | 2019-11-26 | 天津市惠达实验仪器有限公司 | A kind of high-precision electronic tension tester |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2075257A (en) * | 1930-08-06 | 1937-03-30 | Rca Corp | Receiver control |
| CN2934845Y (en) * | 2006-08-09 | 2007-08-15 | 石成竹 | Connection flange for pipeline |
| CN201218825Y (en) * | 2008-06-06 | 2009-04-08 | 宝山钢铁股份有限公司 | Contact resistor measuring apparatus |
| WO2010004135A1 (en) * | 2008-07-07 | 2010-01-14 | Universite Des Sciences Et Technologies De Lille | Triaxial cell for the testing of geomaterials in compression and in tension |
| CN201945497U (en) * | 2010-12-21 | 2011-08-24 | 东南大学 | Position fixing device of local triaxial creep test piece of asphalt mixture material |
-
2010
- 2010-12-21 CN CN 201010597871 patent/CN102109435A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2075257A (en) * | 1930-08-06 | 1937-03-30 | Rca Corp | Receiver control |
| CN2934845Y (en) * | 2006-08-09 | 2007-08-15 | 石成竹 | Connection flange for pipeline |
| CN201218825Y (en) * | 2008-06-06 | 2009-04-08 | 宝山钢铁股份有限公司 | Contact resistor measuring apparatus |
| WO2010004135A1 (en) * | 2008-07-07 | 2010-01-14 | Universite Des Sciences Et Technologies De Lille | Triaxial cell for the testing of geomaterials in compression and in tension |
| CN201945497U (en) * | 2010-12-21 | 2011-08-24 | 东南大学 | Position fixing device of local triaxial creep test piece of asphalt mixture material |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105738231A (en) * | 2016-05-11 | 2016-07-06 | 哈尔滨工业大学 | MTS-loading based bituminous mixture fatigue test unit |
| CN106370529A (en) * | 2016-08-30 | 2017-02-01 | 江苏中路工程技术研究院有限公司 | Annular direct shear test device and testing method of asphalt mixture |
| CN110501230A (en) * | 2018-05-16 | 2019-11-26 | 天津市惠达实验仪器有限公司 | A kind of high-precision electronic tension tester |
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Application publication date: 20110629 |