CN109781528A - The device and its application method of swollen effect are cut in test asphalt transition process - Google Patents
The device and its application method of swollen effect are cut in test asphalt transition process Download PDFInfo
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- CN109781528A CN109781528A CN201910118989.9A CN201910118989A CN109781528A CN 109781528 A CN109781528 A CN 109781528A CN 201910118989 A CN201910118989 A CN 201910118989A CN 109781528 A CN109781528 A CN 109781528A
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- 239000010426 asphalt Substances 0.000 title claims abstract description 93
- 238000012360 testing method Methods 0.000 title claims abstract description 77
- 238000000034 method Methods 0.000 title claims abstract description 47
- 230000008569 process Effects 0.000 title claims abstract description 38
- 230000007704 transition Effects 0.000 title claims abstract description 35
- 230000000694 effects Effects 0.000 title claims abstract description 32
- 239000000203 mixture Substances 0.000 claims description 14
- 238000012545 processing Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 4
- 230000008859 change Effects 0.000 description 11
- 239000011295 pitch Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 210000003127 knee Anatomy 0.000 description 2
- 230000010412 perfusion Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 208000002925 dental caries Diseases 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000010410 reperfusion Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses the devices that swollen effect is cut in a kind of test asphalt transition process, including the first chamber and the second chamber, the first chamber include bottom plate, the first foreboard and the first back plate, and the first back plate is equipped with guide rail；Bottom plate two sides are equipped with moveable outer panel；First chamber top is equipped with the first top plate, and the first top plate, the first foreboard and the first back plate surround opening；Moveable interior plate there are two being set in first chamber；Outer panel is equipped with stress strain gauge；Second chamber is surrounded by the second top plate, the second foreboard, the second back plate and the second side plate, and the second side plate height is the 1/4-1/3 of the second foreboard height, and the second top plate is equipped with pressure-bearing joint, is provided with guide groove in the second back plate；First top plate and the second side plate adjacent are equipped with gap, are plugged with baffle in gap；Plate outer surface is equipped with anchor tip.Operability of the present invention is high, accuracy is good, can analyze the influence for cutting swollen effect of asphalt transition process.
Description
Technical field
The invention belongs to actual road test equipment technical fields, and in particular to cut in a kind of test asphalt transition process
The device and its application method of swollen effect.
Background technique
Asphalt is a kind of granular materials with labyrinth being made of mineral aggregate, pitch and gap.It is driving a vehicle
Under the action of load and external environment, asphalt shows slow transition state, to generate a series of pavement diseases.
However, for a long time, field of road focuses more on the macro-mechanical property of ground surface material and structure, focus on engineering experience,
For in the transition process of asphalt, the research for cutting swollen effect especially in transition process is not deep enough.Therefore it is directed to
The examination that swollen effect is cut in asphalt transition process is developed in the research for cutting swollen function influence in asphalt transition process
Experiment device just becomes particularly important.
Summary of the invention
It is an object of the invention to overcome deficiency in the prior art, a kind of detection asphalt is provided in transition process
In cut the device of swollen effect.In transition process, by the stress strain gauge on side wall, the transverse direction of asphalt is collected
Shear stress and strain on direction, that accurately reacts asphalt system cuts swollen effect.
The first purpose of the invention is to provide a kind of test asphalts, and the device of swollen effect is cut in transition process,
It including the first chamber and slips in described first case indoor second chamber, first chamber includes bottom plate, the bottom plate
Front side is installed with the first foreboard, and rear side is installed with the first back plate, and the length and institute of first foreboard and first back plate
The length for stating bottom plate is identical, is also provided with guide rail in first back plate；Outside is symmetrically arranged at left and right sides of the bottom plate
Plate, the side of two outer panels and first foreboard are sliding, and the opposite other side and first back plate are sliding；
It is symmetrically arranged with the first top plate at left and right sides of first chamber top, the one of each first top plate lower end
Side is flexibly connected with first foreboard, and the opposite other side is flexibly connected with first back plate, and two described first
Distance is separated between the abutting end of top plate, and two first top plates, first foreboard and first back plate enclose and connect to be formed
For slipping second chamber into described first case indoor opening；
The outside that each first top plate lower end is located at two adjacent outer panels is equipped with the first limit plate,
Each first limit plate is sliding with first top plate；Each first limit plate and the adjacent outer panel it
Between be equipped with the first spring；
The outside that the bottom plate upper end is located at two adjacent outer panels is equipped with the second limit plate, each described
Second limit plate is sliding with the bottom plate；Second is equipped between each second limit plate and the adjacent outer panel
Spring；
The direction that two outer panels are parallel in first chamber is also symmetrically arranged with two interior plates, described in two
The side of interior plate and first foreboard are sliding, and the opposite other side and first back plate are sliding；In one of them is described
First is formed between side plate and a neighbouring outer panel surveys pressure space, another described interior plate and neighbouring another
Second is formed between the outer panel and surveys pressure space, and first survey pressure space and described second are surveyed in pressure space and be equipped with stress
Strain transducer；
Second chamber is enclosed by the second top plate, the second foreboard, the second back plate and two the second side plates being oppositely arranged
It connects, the height of two second side plates is the 1/4-1/3 of the second foreboard height, and second cover top surface is set
There is the pressure-bearing joint of connection UTM test machine loader, longitudinally offers in second back plate and to match with the guide rail
Guide groove；
First top plate is all provided with two the second side plate adjacents and has the gap, and is plugged in each gap
Baffle, the bottom end of the baffle connect with the bottom plate, and top upwardly extends, and are located at outside first chamber；The bottom plate
Outer surface be additionally provided with connection UTM testing machine anchor tip.
Preferably, the side on the first foreboard inner wall longitudinally offers first sliding groove, and the opposite other side is longitudinally opened
Equipped with second sliding slot；The side of the first back plate inner wall longitudinally offers third sliding slot, and the opposite other side longitudinally offers
4th sliding slot, and the first sliding groove is opposite with the third runner position, the second sliding slot and the 4th runner position
Relatively, an outer panel and an interior plate slip between the first sliding groove and the third sliding slot, separately
One outer panel and another described interior plate slip between the second sliding slot and the 4th sliding slot.
Preferably, it laterally opens the outside that each first top plate lower surface is located at two adjacent outer panels
Equipped with the first groove, first crossbar is horizontally arranged in first groove, slipping in the first crossbar has the first limit plate,
The first limit hole is longitudinally offered on first limit plate, and multiple second limit holes are laterally offered in the first crossbar,
First fixed screw limits first limit plate also cross first limit hole and one of them described second limit hole
Position；
The outside that the plate upper surface is located at two adjacent outer panels offers the second groove, and described
Second crossbar is horizontally arranged in two grooves, slipping in the second crossbar has the second limit plate, indulges on second limit plate
To third limit hole is offered, multiple 4th limit holes are laterally offered in the second crossbar, the second fixed screw is worn simultaneously
The third limit hole and one of them described 4th limit hole are crossed, second limit plate is limited.
Preferably, one end of each stress strain gauge is fixed on the inner wall of the adjacent outer panel,
The opposite other end is in contact with the inner wall of the adjacent interior plate.
Preferably, each first limit plate passes through the first fixed screw and first top plate is affixed, Mei Gesuo
State that the second limit plate passes through the second fixed screw and the bottom plate is affixed.
Preferably, the pressure-bearing joint includes upper connection, and the bottom end of the upper connection is connected with main shaft, the top
Connector and the main shaft joint are equipped with fixed top plate, and the bottom end of the main shaft is equipped with pressure bottom plate, the pressure bottom plate position
In in second chamber.
Preferably, perforating is offered in second cover top surface, the main shaft lower end passes through the perforating simultaneously
In second chamber.
Preferably, the bottom end of the bottom plate is fixedly provided with multiple support plates.
A second object of the present invention is to provide the dresses that swollen effect is cut in a kind of above-mentioned test asphalt transition process
The application method set, specifically includes the following steps:
Step 1, the second chamber is slipped along guide rail into the first chamber, while by two baffle grafting into the gap
It is interior, the first chamber and the second chamber are separated；
Step 2, asphalt to be measured is filled in the first chamber and the second chamber, then pressure-bearing joint is installed, and make
Pressure bottom plate on pressure-bearing joint is contacted with the upper surface of second case indoor asphalt mixture；
Step 3, the upper connection of pressure-bearing joint is connect with UTM test machine loader；By stress strain gauge with
Computer for data processing is connected；
Step 4, anchor tip is connect with UTM testing machine, then detaches baffle, started UTM test machine loader, make
Pressure bottom plate moves down；The computer for being used for data processing is opened simultaneously；
Step 5, when the shift value that bottom plate moves down that presses reaches setting value, it is mixed to record pitch to be measured for off-test
Close the shear stress of material and the changing value of strain.
Preferably, it is 80mm that setting value is displaced in step 6.
Compared with prior art, the beneficial effects of the present invention are:
The present invention according to the migration characteristic of asphalt, provide cut in a kind of test asphalt transition process it is swollen
The device of effect is answered by being mounted on the Transverse Shear of the stress strain gauge real-time collecting mixture of side wall during the test
Power and strain, that accurately reacts asphalt system cuts swollen effect.
Operability of the present invention is high, stability is strong, accuracy is good, and can analyze asphalt transition process cuts swollen work
The research of influence, interfacial contact characteristic and transition process for asphalt is of great significance.
Detailed description of the invention
Fig. 1 is that embodiment 1 tests the main view that the device of swollen effect is cut in asphalt transition process；
Fig. 2 is that embodiment 1 tests in asphalt transition process to cut and takes down the first foreboard and the in the device of swollen effect
Main view after one back plate；
Fig. 3 is that embodiment 1 is tested in asphalt transition process when cutting the device of swollen effect and being not provided with pressure-bearing joint
Top view；
Fig. 4 is that the structure of the first back plate in the device for cut in the test asphalt transition process of embodiment 1 swollen effect is shown
It is intended to；
Fig. 5 is that the structure of the second chamber in the device for cut in the test asphalt transition process of embodiment 1 swollen effect is shown
It is intended to；
Fig. 6 is that embodiment 1 tests the first groove in the device for cutting swollen effect in asphalt transition process, the first cross
The structural schematic diagram of bar, the first limit hole and the second limit hole；
Fig. 7 is the shear stress of the asphalt of tetra- kinds of gradations of embodiment 2-5 with the curve graph of temperature change, wherein
Fig. 7 (A) be AC10 gradation asphalt respectively 3.9%, 4.3%, 4.8%, 5.3%, 5.8% asphalt content quality
Under score shear stress with temperature change curve graph, Fig. 7 (B) be the asphalt of AC13 gradation be respectively 3.9%,
4.3%, curve graph of the shear stress with temperature change, Fig. 7 (C) under 4.8%, 5.3%, 5.8% asphalt content mass fraction
Asphalt for AC16 gradation is respectively under 3.9%, 4.3%, 4.8%, 5.3%, 5.8% asphalt content mass fraction
Shear stress with temperature change curve graph, Fig. 7 (D) be the asphalt of AC20 gradation be respectively 3.9%, 4.3%,
4.8%, under 5.3%, 5.8% asphalt content mass fraction shear stress with temperature change curve graph；
Fig. 8 is the curve that the shear stress of the asphalt of tetra- kinds of gradations of embodiment 2-5 changes with asphalt content.
Description of symbols: 1- upper connection, the second top plate of 2-, the first fixed screw of 3-, the first top plate of 4-, 5- baffle,
The second side plate of 6-, 7- support plate, 8- anchor tip, the first limit plate of 9-, the first spring of 10-, 11- outer panel, 12- interior plate,
13- stress strain gauge, the fixed top plate of 14-, 15- pressure bottom plate, the second foreboard of 16-, the second back plate of 17-, 18- main shaft,
The first groove of 19-, 20- bottom plate, the first foreboard of 21-, 22- perforating, 23- guide rail, 24- third sliding slot, the 4th sliding slot of 25-, 26-
First crossbar, the first limit hole of 27-, the second limit hole of 28-.
Specific embodiment
With reference to the accompanying drawing, specific embodiments of the present invention will be described in detail, it is to be understood that guarantor of the invention
Shield range is not limited by the specific implementation.
It should be noted that the stress strain gauge being related in the present invention, UTM test machine loader, UTM are tested
Machine, computer are existing equipment, are not related to any innovation, and the circuit connection of above equipment is all made of conventional circuit and connects
Connect mode.
In the description of the present invention, it is to be understood that, term " on ", "lower", "top", "bottom", "inner", "outside", " preceding ",
The orientation or positional relationship of the instructions such as " rear ", "left", "right" is to be based on the orientation or positional relationship shown in the drawings, merely to just
In the description present invention, rather than the device or component of indication or suggestion meaning must have a particular orientation, with specific orientation
Construction and operation, therefore be not considered as limiting the invention.
Embodiment 1
The device of swollen effect is cut in a kind of asphalt transition process, specifically as shown in figures 1 to 6, including the first chamber and
It slips in first case indoor second chamber, the first chamber includes bottom plate 20, and the front side of bottom plate 20 is installed with the first foreboard 21, after
Side is installed with the first back plate, and the length of the first foreboard 21 and the first back plate is identical as the length of bottom plate 20, in the first back plate also
Longitudinal direction offers guide rail 23, i.e., in the present invention, the bottom plate 20 of the first chamber, the first foreboard 21 and the first back plate are to be fixedly connected
's.
The left and right sides of bottom plate 20 is symmetrically arranged with outer panel 11, and the side of two outer panels 11 and the first foreboard 21 are sliding
It connects, the opposite other side and the first back plate are sliding；And the side on 21 inner wall of the first foreboard longitudinally offers first sliding groove, relatively
The other side longitudinally offer second sliding slot；The side of first back plate inner wall longitudinally offers third sliding slot 24, and opposite is another
Side longitudinally offers the 4th sliding slot 25, and first sliding groove is opposite with 24 position of third sliding slot, second sliding slot and the 4th sliding slot 25
It sets relatively, an outer panel 11 and an interior plate 12 slip between first sliding groove and third sliding slot 24, another outside
Plate 11 and another interior plate 12 slip between second sliding slot and the 4th sliding slot 25.
In the present invention, two outer panels 11 can move left and right on the base plate 20, and the present invention passes through in the first foreboard
The sliding slot that is oppositely arranged is opened up on 21 inner wall and the inner wall of the first back plate to realize the left side of two outer panels 11 on the base plate 20
It moves right, this setup is to deform device in use, when asphalt transverse direction deforms, in test
Asphalt two outer panels 11 can be pushed outward, at this time due to the presence of outer lateral spring, it is believed that the movement
For uniform motion, so that 13 stress balance of stress strain gauge.
Be symmetrically arranged with the first top plate 4 at left and right sides of first chamber top, the side of each first top plate, 4 lower end with
First foreboard 21 is flexibly connected, and the opposite other side is flexibly connected with the first back plate, and in the present invention, two the first top plates 4 are
It is to be connect by screw with the top of the first foreboard 21 and the first back plate, this setup is in order in the process of test
In, the convenient asphalt reperfusion mixture in the first chamber can the perfusion in the first chamber when removing two the first top plates 4
Two the first top plates 4 are fixed on the first chamber top, can start to test by asphalt after perfusion finishes.
Distance, and two the first top plates 4, the first foreboard 21 and the first back plate are separated between the abutting end of two the first top plates 4
It encloses and connects to be formed for slipping the second chamber into first case indoor opening；It is to enable the second chamber that this structure, which is arranged,
It is placed in the first chamber.
The outside that each first top plate, 4 lower end is located at two adjacent outer panels 11 is equipped with the first limit plate 9, each
First limit plate 9 is sliding with the first top plate 4；The first spring is equipped between each first limit plate 9 and adjacent outer panel 11
10, one end of the first spring 10 and outer panel 11 are affixed, and the other end and the first limit plate 9 are affixed；20 upper end of bottom plate is located at adjacent
The outsides of two outer panels 11 be equipped with the second limit plate, each second limit plate is sliding with bottom plate 20；Each second
Second spring is equipped between limit plate and adjacent outer panel 11, one end of second spring and outer panel 11 are affixed, the other end
It is affixed with the second limit plate.
The outside that each first top plate, 4 lower surface is located at two adjacent outer panels 11 laterally offers the first groove
19, first crossbar 26 is horizontally arranged in the first groove 19, slipping in first crossbar 26 has the first limit plate 9, and the first limit
Plate 9 is worn to connect and be slided in first crossbar 26；The first limit hole 27 is longitudinally offered on first limit plate 9, first is horizontal
Multiple second limit holes 28 are laterally offered on bar 26, the first fixed screw 3 is also cross the first limit hole 27 and one of them
Second limit hole 28 limits the first limit plate 9；
The outside that 20 upper surface of bottom plate is located at two adjacent outer panels 11 offers the second groove, in the second groove
Be horizontally arranged with second crossbar, slipping in second crossbar has the second limit plate, the second limit plate be wear connect it is enterprising in second crossbar
Row sliding；Third limit hole is longitudinally offered on second limit plate, and multiple 4th limit holes are laterally offered in second crossbar,
Second fixed screw limits the second limit plate also cross third limit hole and one of them the 4th limit hole.
The sliding and limit of the first limit plate 9 and the second limit plate may be implemented in above-mentioned set-up mode, to make outside
Plate 11 can be free to slide or fixed.
In the present invention, before on-test, asphalt, the first limit plate 9 and the second limit are perfused in the first chamber
Position plate is fixed with the first fixed screw 3 and the second fixed screw respectively, and the first spring 10 and second spring are in free shape
State is not compressed and is not also elongated, at this point, the first spring 10 and second spring and stress strain gauge 13 are protected jointly
The balance of outer panel 11 is held, to make outer panel 11 between first sliding groove and third sliding slot 24, or in second sliding slot and the 4th
Vertical state is kept between sliding slot 25.After on-test, the first fixed screw 3 and the second fixed screw, the first limit plate 9 are unscrewed
It can be slided with the second limit plate, when outer side plate 11 is by transversely deforming, outer panel 11 be free to move outward.
It should be noted that during test of the invention, asphalt cut swollen effect under, outer panel 11 is outside
The mobile distance in side is generally between 80-200mm, therefore, first sliding groove, second sliding slot, third sliding slot 24 and the 4th sliding slot
25 width is little, and under the supporting role of the first spring 10 and second spring, outer panel 11 is easy to keep vertical state.
The direction that two outer panels 11 are parallel in first chamber is also symmetrically arranged with two interior plates 12, two interior plates 12
Side and the first foreboard 21 it is sliding, the opposite other side and the first back plate is sliding；One of interior plate 12 and neighbouring one
First is formed between a outer panel 11 and surveys pressure space, and the is formed between another interior plate 12 and another neighbouring outer panel 11
Two survey pressure space, and the first survey pressure space is surveyed in pressure space with second is equipped with stress strain gauge 13, and ess-strain sensing
Device 13 is that this Ba Tuo SBT6 system 7 is microsensor.
The set-up mode of two interior plates 12 and the set-up mode of two outer panels 11 are identical, and the method for operation is also identical,
One end of each stress strain gauge 13 is fixed on the inner wall of adjacent outer panel 11, the opposite other end with it is adjacent
The inner wall of interior plate 12 be in contact.In the present invention, outer panel 11 by one side setting stress strain gauge 13 and
The asphalt of other side filling keeps vertical state.During test, transversely deforming occurs for asphalt, in pushing
Side plate 12, interior plate 12 reach the power being subject on the stress strain gauge 13 being in contact with it, stress strain gauge 13 with
Computer for data processing is connected, to detect shear stress and strain value.
Second chamber is by the second top plate 2, the second foreboard 16, the second back plate 17 and two the second side plates 6 being oppositely arranged
It encloses and connects, the height of two the second side plates 6 is the 1/4-1/3 of 16 height of the second foreboard, and 2 upper surface of the second top plate is equipped with connection
UTM test machine loader pressure-bearing joint longitudinally offers the guide groove 19 to match with guide rail 23 in the second back plate 17；First top
Plate 4 is all provided with two 6 adjacents of the second side plate and has the gap, and baffle 5, the bottom end of baffle 5 and bottom plate are plugged in each gap
20 connect, and top upwardly extends, and are located at outside the first chamber；The outer surface of bottom plate 20 is additionally provided with solid for connecting UTM testing machine
Determine connector 8.
In the present invention, the second chamber passes through the guide groove longitudinally opened up in the second back plate 17 and the guide rail being arranged in the first back plate
23 phases are sliding, and the second chamber is arranged in the first chamber, the second foreboard 16, the height of the second back plate 17 and the first foreboard 21,
The height of first back plate is identical, or slightly larger than the first foreboard 21, the height of the first back plate, due to needing to make during the test
Two casees indoor asphalt enters in the first chamber, and therefore, two side plates of the second chamber will be arranged to take out up and down
From, in order to meet this condition, the present invention is first provided with the second side for the 1/4-1/3 that two height are 16 height of the second foreboard
Plate 6 baffle 5 of pull can be used to close the second chamber up and down for sealing the second chamber upper end, while provided with two,
And enter second case indoor asphalt in the first chamber for detaching during test.
Second top plate, 2 upper surface is equipped with pressure-bearing joint, and pressure-bearing joint includes upper connection 1, and the bottom end of upper connection 1 is affixed
There is main shaft 18, upper connection 1 and 18 joint of main shaft are equipped with fixed top plate 14, and the bottom end of main shaft 18 is equipped with pressure bottom plate 15.
Second top plate, 2 upper surface offers perforating 22, and the main shaft 18 of pressure-bearing joint is equipped in perforating 22, and 18 bottom end of main shaft is applied
Press 15 is in contact with the top for the asphalt being perfused in the second chamber, and before on-test, test of the invention is filled
It is placed in UTM testing machine；During test, upper connection 1 is connect with UTM test machine loader, UTM testing machine load dress
Model UTM15272, the UTM test machine loader set moves downward, and drives pressure-bearing joint to run down, to make to press
Bottom plate 15 is downwardly applied to pressure, and asphalt, which is pressurized, generates vertical displacement, simultaneously as asphalt is a kind of loose state
When vertical displacement occurs transversely deforming can also occur for particle system.
When the displacement that bottom plate 15 moves down that presses reaches 80mm-100mm, ess-strain sensing is collected in off-test
The data that device 13 is collected, the shear stress strain value and longitudinal shear stress obtained in transverse direction become with temperature and asphalt content
The curve of change.
The outer surface of bottom plate 20 is additionally provided with the anchor tip 8 of cylindrical structure, and there is cylindricality interface in UTM testing machine bottom end, will
Anchor tip 8 is connect with cylindricality interface, can connect experimental rig with UTM testing machine.
The bottom end of bottom plate 20 is fixedly provided with 3-4 support plate 7, and support plate 7 is used to support whole device, it is made to keep flat
Weighing apparatus.
Working principle of the present invention is as follows: in test, first case interior space is divided into left, center, right three by the second chamber
Cavity, asphalt form two sliding surfaces in three cavitys.Under the vertical compression of UTM testing machine, mixture
Two sliding surfaces directly started opposite sliding.The sliding deformation direction of asphalt occurs incessantly in vertical direction,
Also there is deformation in transverse direction.During test, transversely deforming occurs for asphalt, pushes interior plate 12, and interior plate 12 passes
On stress strain gauge 13 in power to outer panel 11, stress strain gauge 13 and the computer phase for being used for data processing
Even, to detect shear stress and strain value, and then the influence that transition process Asphalt Mixture cuts swollen effect is obtained.
Embodiment 2
It is a kind of to test in asphalt transition process the application method for cutting the device of swollen effect using embodiment 1, specifically
The following steps are included:
Step 1, the second chamber is slipped along guide rail 23 into the first chamber, while by two 5 grafting of baffle into the seam
In gap, the first chamber and the second chamber are separated；
Step 2, when test for the first time, it is AC10, asphalt content that gradation is filled in the first chamber and the second chamber
The asphalt to be measured that mass fraction is 3.9% installs pressure-bearing joint, and makes the pressure bottom plate 15 and second on pressure-bearing joint
The upper surface of case indoor asphalt mixture contacts；
Step 3, the upper connection of pressure-bearing joint 1 is connect with UTM test machine loader；By stress strain gauge 13
It is connected with the computer for data processing；
Step 4, anchor tip 8 is connect with UTM testing machine, the first chamber and the second chamber is set by UTM testing machine
Interior asphalt temperature is 0 DEG C, detaches baffle 5, starts UTM test machine loader, moves down pressure bottom plate 15；Together
Shi Kaiqi is used for the computer of data processing；
Step 5, when the shift value that bottom plate 15 moves down that presses reaches 80mm, it is mixed to record pitch to be measured for off-test
Close the shear stress of material and the changing value of strain.
After the completion of above-mentioned test, in the identical situation of operation of step 1-3, by the first chamber in step 4 and the second case
Indoor asphalt mixture temperature is arranged respectively to 60 DEG C, 80 DEG C, 100 DEG C, 120 DEG C, 140 DEG C, 155 DEG C, 170 DEG C, then according to
The step of above-mentioned steps 4-5, carries out 7 tests, and the shear stress that after the test, records asphalt to be measured every time with
The changing value of strain.
After the completion of above-mentioned test, then AC10 asphalt from asphalt mixture dosage mass fraction in step 2 replaced respectively
It is 4.3%, 4.8%, 5.3%, 5.8%, 0 DEG C, 60 DEG C, 80 DEG C, 100 is then tested under every kind of asphalt content mass fraction
DEG C, 120 DEG C, 140 DEG C, 155 DEG C, the changing value of the shear stress of asphalt at 170 DEG C of these types of temperature and strain, and remember
Record.
Embodiment 3
Specific test process is with embodiment 2, the difference is that changing the gradation of asphalt into AC13.
Embodiment 4
Specific test process is with embodiment 2, the difference is that changing the gradation of asphalt into AC16.
Embodiment 5
Specific test process is with embodiment 2, the difference is that changing the gradation of asphalt into AC20.
The experimental result of embodiment 2-5 is analyzed, Fig. 7-8 is specifically shown in.Fig. 7 is the drip of tetra- kinds of gradations of embodiment 2-5
The shear stress of green mixture is with the curve graph of temperature change, and wherein Fig. 7 (A) is that the asphalt of AC10 gradation exists respectively
3.9%, under 4.3%, 4.8%, 5.3%, 5.8% asphalt content mass fraction shear stress with temperature change curve graph,
Fig. 7 (B) is the asphalt content quality that the asphalt of AC13 gradation is respectively 3.9%, 4.3%, 4.8%, 5.3%, 5.8%
Under score shear stress with temperature change curve graph, Fig. 7 (C) be the asphalt of AC16 gradation be respectively 3.9%,
4.3%, curve graph of the shear stress with temperature change, Fig. 7 (D) under 4.8%, 5.3%, 5.8% asphalt content mass fraction
Asphalt for AC20 gradation is respectively under 3.9%, 4.3%, 4.8%, 5.3%, 5.8% asphalt content mass fraction
Shear stress with temperature change curve graph；Fig. 8 is that the shear stress of the asphalt of tetra- kinds of gradations of embodiment 2-5 is used with pitch
The curve of variation is measured, tetra- curves of Fig. 8 refer to shear stress of the mixture of different pitches dosage under the conditions of four kinds of gradations at 100 DEG C
With the curve of asphalt content variation.
For comparison diagram 7,8 it is found that under same gradation, shear stress-temperature curve moves towards essentially identical, although i.e. different gradation
Under, the intersections of complex curve of different pitches dosage is different, and shear stress is all reduced with the reduction of temperature；Under same temperature, shear stress-
Moving towards for asphalt content curve is essentially identical, although the knee of curve that is, under different gradation is different, shear stress is all along with pitch
The trend that dosage presentation rises after falling before.Thus, it is believed that the present invention tests asphalt, test result
All have repeatability.
Meanwhile comparison diagram 7,8, it is found that pitch gradation is different, asphalt content is different, the result obtained through the invention is not yet
Identical to the greatest extent, in shear stress, intersections of complex curve, all there is significant differences for knee of curve etc., can intuitively reflect drip
The sliding of green mixture and dilatancy.Therefore, it can be assumed that experimental rig and test method through the invention it is obtained
Test data has conspicuousness.
In the present invention, disclosed above is only specific embodiments of the present invention, and still, the embodiment of the present invention is not limited to
This, the changes that any person skilled in the art can think of should all fall into protection scope of the present invention.
Claims (9)
1. cutting the device of swollen effect in a kind of test asphalt transition process, which is characterized in that including the first chamber and cunning
It connects in described first case indoor second chamber, first chamber includes bottom plate (20), and the front side of the bottom plate (20) is fixed
Have the first foreboard (21), rear side is installed with the first back plate, and the length and institute of first foreboard (21) and first back plate
The length for stating bottom plate (20) is identical, and guide rail (23) are also provided in first back plate；The left and right sides of the bottom plate (20) is right
Title is provided with outer panel (11), and the side of two outer panels (11) and first foreboard (21) are sliding, and opposite is another
Side and first back plate are sliding；
It is symmetrically arranged at left and right sides of first chamber top the first top plate (4), each first top plate (4) lower end
Side is flexibly connected with first foreboard (21), and the opposite other side is flexibly connected with first back plate, two institutes
It states and is separated with distance between the abutting end of the first top plate (4), and two first top plates (4), first foreboard (21) and described
First back plate, which is enclosed, to be connect to be formed for slipping second chamber into described first case indoor opening；
The outside that each first top plate (4) lower end is located at two adjacent outer panels (11) is equipped with the first limit
Plate (9), each first limit plate (9) are sliding with first top plate (4)；Each first limit plate (9) and phase
The first spring (10) are equipped between the adjacent outer panel (11)；
The outside that bottom plate (20) upper end is located at two adjacent outer panels (11) is equipped with the second limit plate, each
Second limit plate is sliding with the bottom plate (20)；Each second limit plate and the adjacent outer panel (11) it
Between be equipped with second spring；
The direction that two outer panels (11) are parallel in first chamber is also symmetrically arranged with two interior plates (12), and two
The side of the interior plate (12) and first foreboard (21) are sliding, and the opposite other side and first back plate are sliding；Its
In form first between an interior plate (12) and neighbouring one outer panel (11) and survey pressure space, described in another
Between interior plate (12) and another neighbouring described outer panel (11) formed second survey pressure space, it is described first survey pressure space with
Stress strain gauge (13) are equipped in the second survey pressure space；
Second chamber is by the second top plate (2), the second foreboard (16), the second back plate (17) and be oppositely arranged two second
Side plate (6), which encloses, to be connect, and the height of two second side plates (6) is the 1/4-1/3 of the second foreboard (16) height, described
Second top plate (2) upper surface is equipped with the pressure-bearing joint of connection UTM test machine loader, longitudinal direction on the outside of second back plate (17)
Offer the guide groove to match with the guide rail (23)；
First top plate (4) is all provided with two the second side plate (6) adjacents and has the gap, equal grafting in each gap
Have baffle (5), the bottom end of the baffle (5) connects with the bottom plate (20), and top upwardly extends, and is located at first chamber
Outside；The outer surface of the bottom plate (20) is additionally provided with the anchor tip (8) for connecting UTM testing machine.
2. cutting the device of swollen effect in test mixture transition process according to claim 1, which is characterized in that described the
Side on one foreboard (21) inner wall longitudinally offers first sliding groove, and the opposite other side longitudinally offers second sliding slot；It is described
The side of first back plate inner wall longitudinally offers third sliding slot (24), and the opposite other side longitudinally offers the 4th sliding slot (25),
And the first sliding groove is opposite with third sliding slot (24) position, the second sliding slot and the 4th sliding slot (25) position phase
Right, an outer panel (11) and an interior plate (12) are slipped in the first sliding groove and the third sliding slot
(24) between, another described outer panel (11) and interior plate described in another (12) slip the second sliding slot with it is described
Between 4th sliding slot (25).
3. cutting the device of swollen effect in test mixture transition process according to claim 1, which is characterized in that Mei Gesuo
It states the first top plate (4) lower surface and is located at the outsides of two adjacent outer panels (11) and laterally offer the first groove
(19), it is horizontally arranged with first crossbar (26) in first groove (19), slipping on the first crossbar (26) has the first limit
Position plate (9) is longitudinally offered the first limit hole (27) on first limit plate (9), is laterally opened on the first crossbar (26)
Equipped with multiple second limit holes (28), the first fixed screw (3) is also cross first limit hole (27) and one of institute
The second limit hole (28) are stated, first limit plate (9) is limited；
The outside that bottom plate (20) upper surface is located at two adjacent outer panels (11) offers the second groove, institute
It states and is horizontally arranged with second crossbar in the second groove, slipping in the second crossbar has the second limit plate, second limit plate
Upper longitudinal direction offers third limit hole, and multiple 4th limit holes are laterally offered in the second crossbar, and the second fixed screw is same
When pass through the third limit hole and one of them described 4th limit hole, will second limit plate limit.
4. cutting the device of swollen effect in test asphalt transition process according to claim 1, which is characterized in that every
One end of a stress strain gauge (13) is fixed on the inner wall of the adjacent outer panel (11), and opposite is another
End is in contact with the inner wall of the adjacent interior plate (12).
5. according to the device for cutting swollen effect in test asphalt transition process described in claim 1, which is characterized in that described
Pressure-bearing joint includes upper connection (1), and the bottom end of the upper connection (1) is connected with main shaft (18), the upper connection (1) with
Main shaft (18) joint is equipped with fixed top plate (14), and the bottom end of the main shaft (18) is equipped with pressure bottom plate (15), and institute
Pressure bottom plate (15) is stated to be located in second chamber.
6. according to the device for cutting swollen effect in the test asphalt transition process described in claim 5, which is characterized in that described
It is offered perforating (22) on second top plate (2) upper surface, main shaft (18) lower end passes through the perforating (22) and is located at
In second chamber.
7. according to the device for cutting swollen effect in test asphalt transition process described in claim 1, which is characterized in that described
The bottom end of bottom plate (20) is fixedly provided with multiple support plates (7).
8. the application method of the device of swollen effect is cut in a kind of test asphalt transition process described in claim 1,
It is characterized in that, specifically includes the following steps:
Step 1, the second chamber is slipped along guide rail (23) into the first chamber, while by two baffle (5) grafting into the seam
In gap, the first chamber and the second chamber are separated；
Step 2, asphalt to be measured is filled in the first chamber and the second chamber, then pressure-bearing joint is installed, and make pressure-bearing
Pressure bottom plate (15) on connector is contacted with the upper surface of second case indoor asphalt mixture；
Step 3, the upper connection of pressure-bearing joint (1) is connect with UTM test machine loader；By stress strain gauge (13)
It is connected with the computer for data processing；
Step 4, anchor tip (8) is connect with UTM testing machine, is then detached baffle (5), start UTM test machine loader,
Move down pressure bottom plate (15)；The computer for being used for data processing is opened simultaneously；
Step 5, when the shift value that bottom plate (15) move down that presses reaches setting value, it is mixed to record pitch to be measured for off-test
Close the shear stress of material and the changing value of strain.
9. the application method of the device of swollen effect is cut in test asphalt transition process according to claim 8,
It is characterized in that, it is 80mm that setting value is displaced in step 6.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910118989.9A CN109781528B (en) | 2019-02-18 | 2019-02-18 | Device for testing shear expansion effect in asphalt mixture migration process and application method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910118989.9A CN109781528B (en) | 2019-02-18 | 2019-02-18 | Device for testing shear expansion effect in asphalt mixture migration process and application method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110411838A (en) * | 2019-08-28 | 2019-11-05 | 交通运输部公路科学研究所 | A method of passing through stress response assay asphalt temperature sensibility |
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