CN109116003A - A kind of asphalt uniaxial penetration test device of water bath with thermostatic control - Google Patents
A kind of asphalt uniaxial penetration test device of water bath with thermostatic control Download PDFInfo
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- CN109116003A CN109116003A CN201811121700.0A CN201811121700A CN109116003A CN 109116003 A CN109116003 A CN 109116003A CN 201811121700 A CN201811121700 A CN 201811121700A CN 109116003 A CN109116003 A CN 109116003A
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- water
- bath
- work box
- thermostatic control
- penetration test
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/42—Road-making materials
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Abstract
The invention discloses a kind of asphalt uniaxial penetration test devices of water bath with thermostatic control, including water-bath work box, fixture, injection pressure head, UTM testing machine, the fog room being arranged in water-bath work box, operating platform, water-bath flow device, temperature sensor, heater；Heater and temperature sensor are to control the fluid temperature in water-bath work box；Water-bath flow device is to drive the liquid of water-bath work box to be in flow regime；Two fixtures are symmetricly set on operating platform upper end, and operating platform upper end is equipped with sliding slot, fixture opposite sliding along the chute；It adjusts after two fixtures step up test specimen, is fixed two fixtures with operating platform by bolt；The injection pressure head is arranged in test specimen upper end；The pressure head setting of the UTM testing machine is in injection pressure head upper end, and the transmission rod of UTM testing machine passes through the case lid of water-bath work box upper end, and transmission rod can move up and down with respect to case lid, and be sealed between case lid and transmission rod equipped with sealing element；The present invention can be easy to control experimental enviroment.
Description
Technical field
The invention belongs to asphalt uniaxial penetration test field, the asphalt list of especially a kind of water bath with thermostatic control
Axis penetration test device.
Background technique
Currently, due to bituminous pavement surfacing, low noise, it is high-comfort the advantages that, be widely used in domestic and international height
Grade road surface.But with rapid development of economy, the volume of traffic is increased rapidly, and bituminous pavement is also easy to produce failure by shear.Forefathers pass through
The reason of asphalt mixture shearing destroys is statisticallyd analyze, discovery is mainly since the high-temperature stability of asphalt is insufficient.?
When summer high temperature, asphalt is also easy to produce deformation and cut process at temperature and heavily loaded double action, and road surface is caused to generate
Track gathers around the diseases such as packet.Therefore, the high-temperature stability of Research on Asphalt Mixture has weight to the service life for extending bituminous pavement
Want meaning.For the stress for simulating practical road surface, it is mixed that the Sun Lijun professor of Tongji University et al. introduces a kind of evaluation pitch
Test method --- the uniaxial penetration test for closing the injection intensity of material test specimen, for the inspection of stability at high temperature of asphalt mixture.This
Test method was indexed among " bituminous pavement design for highway specification " in 2017.
The high-temperature stability of test measurement asphalt, therefore choosing 60 DEG C is uniform tests temperature.Currently, test people
When member carries out uniaxial penetration test, mostly test specimen is placed in 60 DEG C of air baths, air bath to specimen test environment, such as sealing,
Temperature control, air generator it is more demanding, and maintenance be also more troublesome.
Summary of the invention
The purpose of the present invention is to provide a kind of asphalt uniaxial penetration test devices of water bath with thermostatic control, to realize drip
Green mixture uniaxial penetration test environment is easy to control.
The technical solution for realizing the aim of the invention is as follows:
A kind of asphalt uniaxial penetration test device of water bath with thermostatic control, including water-bath work box, fog room, operation are flat
Platform, water-bath flow device, temperature sensor, heater, fixture, injection pressure head, UTM testing machine；The fog room, operation are flat
Platform, water-bath flow device, temperature sensor, heater are arranged in work box；The heater and temperature sensor to
Control the fluid temperature in water-bath work box；The water-bath flow device is to drive the liquid of water-bath work box to be in flowing shape
State；The fixture is two, is symmetricly set on operating platform upper end, and operating platform upper end is equipped with sliding slot, and fixture is opposite along the chute
Sliding；It adjusts after two fixtures step up test specimen, is fixed two fixtures with operating platform by bolt；The injection pressure head is set
It sets in test specimen upper end；The pressure head setting of the UTM testing machine passes through water-bath in injection pressure head upper end, the transmission rod of UTM testing machine
The case lid of work box upper end, transmission rod can move up and down with respect to case lid, and it is close that sealing element progress is equipped between case lid and transmission rod
Envelope.
Compared with prior art, the present invention its remarkable advantage:
(1) the asphalt uniaxial penetration test device for the water bath with thermostatic control invented, structure is simple, easy to operate, temperature
It is evenly distributed and can accurately control, relative to air bath, experimental enviroment is more easier to control, while being able to achieve asphalt
Maintenance.
(2) the asphalt uniaxial penetration test device for the water bath with thermostatic control invented, can recycle test water, save
About water resource, it is environmentally protective.
(3) the asphalt uniaxial penetration test device for the water bath with thermostatic control invented, can satisfy various sizes of pitch
Test mixture, versatility are good.
Present invention is further described in detail with reference to the accompanying drawing.
Detailed description of the invention
Fig. 1 is experimental rig overall structure main view of the invention.
Fig. 2 is experimental rig top view of the invention.
Fig. 3 is operating platform of the invention, fixture, test specimen, UTM ram position relational graph.
Fig. 4 is water-bath work box cover structure schematic diagram of the invention.
Fig. 5 is 1 experimental result picture of embodiment.
Specific embodiment
In order to illustrate technical solution of the present invention and technical purpose, with reference to the accompanying drawing and specific embodiment is the present invention
It is further to introduce.
In conjunction with Fig. 1-Fig. 4, a kind of asphalt uniaxial penetration test device of water bath with thermostatic control, including water-bath work box 1,
Fog room 2, operating platform 3, water-bath flow device 12, temperature sensor 13, heater 11, fixture 17, injection pressure head 19, UTM
Testing machine；The fog room 2, operating platform 3, water-bath flow device 12, temperature sensor 13, heater 11 are arranged at work
In case 1；The heater 11 and temperature sensor 13 are to control 14 temperature of liquid in water-bath work box 1, so that liquid 14
Temperature is maintained at 60 DEG C；The water-bath flow device 12 to drive the liquid 14 of water-bath work box 1 to be in flow regime so that
Temperature in water-bath work box 1 is kept in balance, and test accuracy is improved.The fixture 17 is two, and it is flat to be symmetricly set on operation
3 upper end of platform, 3 upper end of operating platform are equipped with sliding slot, and the opposite sliding along the chute of fixture 17 adjusts spacing between two fixtures 17, fits
Answer various sizes of test specimen 18；It adjusts after two fixtures 17 step up test specimen 18, it is by bolt that two fixtures 17 and operation are flat
Platform 3 is fixed；The injection pressure head 19 is arranged in 18 upper end of test specimen；The pressure head 20 of the UTM testing machine is arranged in injection pressure head 19
Upper end, the transmission rod 21 of UTM testing machine pass through the case lid of 1 upper end of water-bath work box, and transmission rod 21 can move up and down with respect to case lid,
And it is sealed between case lid and transmission rod 21 equipped with sealing element.
Further, the 17 semicircular in shape structure of fixture, arc surface are bonded with 18 periphery of test specimen, so that fastening temperature
Degree.
Further, the water-bath flow device 12 is motor-driven impeller.
Further, the heater 11 includes adding thermal resistance 15 and the isolation cover 16 being arranged in outside adding thermal resistance 15,
Isolation cover 16 ensures testing crew safe operation.
Further, entire experimental provision is additionally provided with purification device, the purification device include outlet pipe 10, control valve 5,
First filter device 8, filter chamber 6, water inlet pipe 4, recovery room 9；Described 10 one end of outlet pipe is connected with 1 lower end of water-bath work box,
The other end is connected with filter chamber 6；The outlet pipe 10 is equipped with the first filter device 8, sets on 8 bottom water pipe of the first filter device
There is recovery room 9；6 other end of filter chamber is connected with water inlet pipe 4, and water inlet pipe 4 is connected with 1 upper end of water-bath work box；The mistake
Water pump and the second filter device 7 are equipped in filter chamber 6, water pump fills the water in water-bath work box 1 from outlet pipe 10 through the first filtering
8 and the filtering of filter chamber 6 are set, are recycled to water-bath work box 1 through water inlet pipe 4；First filter device 8 is used for filtration test water
In large granular impurity, and large granular impurity is recycled in recovery room 9.The further removal test of second filter device 7
With the other impurities in water, so that test water is recycled.
Preferably, first filter device 8 uses asbestos gauge, to the large granular impurity in filtration test water.
Preferably, second filter device 7 uses porous solid material, to filter its in removal test water
His impurity.
Further, the recovery room 9 and water pipe are detachable structure, convenient for that can determine after test water purifies
Phase clears up the impurity particle in recovery room.
Further, the case lid is spliced by two upper covers 22, and two 22 interphases pair of upper cover are provided with semicircle
Hole 23, interior be equipped with of semi-circular hole 23 do circular sealing ring as sealing element.Transmission rod 21 passes through the circle of two upper covers 22 splicing
Shape hole is contacted with pressure head 20.Rub very little between sealing ring and UTM transmission rod 21, can be ignored, does not influence test accuracy.
Embodiment 1
As shown in figure 3, operating platform 3 using fixture 17 clamp test specimen 18, on test specimen 18 place injection pressure head 19,
UTM pressure head of testing machine 20 and UTM transmission rod 21, by the work chamber of entire experimental rig UTM testing machine, by its UTM testing machine
Power is provided and carries out uniaxial penetration test.
Uniaxial penetration specific implementation step is as follows:
The first step opens water-bath case lid, and the uniaxial penetration test specimen of diameter 150mm, high 100mm are placed on water-bath work box
It on the operating platform of bottom, is fixed on the operational platform, is gone through with fixture, it is ensured that test specimen will not move easily
It is dynamic.And next test test specimen is placed in fog room.
Second step opens simultaneously electric heater and water-bath by the way that water is slowly injected into water-bath work box at water-bath case lid
Flow device rises water temperature equilibrium, stops injection when water exceeds uniaxial penetration test specimen about 20mm, closes case lid.Observation temperature
The temperature shown on sensor is spent, at 60 DEG C of test temperature to be achieved, closes water-bath flow device, electric heater continues to run pair
Test temperature is kept the temperature, and uniaxial penetration test specimen is conserved 5~6h in water-bath work box.
Third step opens water-bath case lid, by successively placing injection pressure head, UTM testing machine in uniaxial penetration test piece upper part
Pressure head and UTM transmission rod after, water-bath case lid is sealed.Injection indenter size is corresponding with test specimen, the cylinder diameter of lower part
For 42mm, high 50mm, position should be directed at test specimen center, coarse adjustment ram position, it is made from surface of test piece to be about 1mm, it is laggard
Row fine tuning contacts it with test specimen, until contact pressure is close but is no more than 0.05kN.Last start-up loading, loading speed
For 1mm/min, asphalt uniaxial penetration test is carried out, the computer connecting with UTM work chamber automatically records the pressure of test
And displacement, typical stress-deformation pattern are as shown in Figure 5.
4th step after the end of the test, closes electric heater.After waiting test water substantially to cool down, control valve is opened, is led to
The effect for crossing outlet pipe and water pump, enters test water in filter device；When test water passes through asbestos gauge, asbestos gauge meeting
The larger particles that test generates are retained, are stored in recovery room, recovery room bottom is detachable, finishes in test water purification
Periodically the impurity particle in recovery room can be cleared up afterwards；Porous solid material in filter device to test water into
The further filtration, purification of row, filters out the other impurities in water；Finally by water inlet pipe make it is cleaned after water enter water-bath
It is heated in work box, next test specimen is taken out from fog room, carry out uniaxial penetration test.
5th step reads maximum penetration load P on computers, and passing through for calibrated altitude asphalt is calculated according to the following formula
Enter intensity:
RT=fTσp
In formula: σpFor injection stress, unit MPa；A is pressure head cross-sectional area, this embodiment A=1385.44mm2；fT
For injection stress coefficient, to diameter 150mm test specimen, fT=0.35.
Embodiment 2
The diameter of the present embodiment uniaxial penetration test specimen unlike the first embodiment becomes 100mm, under corresponding pressure head
Portion's cylinder diameter becomes 28.5mm, and specific implementation step and embodiment 1 are consistent.When finally carrying out the calculating of injection intensity, pressure
Head cross-sectional area A=637.94mm2, to diameter 100mm test specimen, injection stress coefficient fT=0.34.
Embodiment 3
The present embodiment changes the step the test temperature in 2 unlike the first embodiment, compares under different bath temperatures,
The variation of asphalt injection intensity.
To sum up, the present invention provides a kind of constant temperature that tested again after water-bath maintenance to uniaxial penetration test specimen
The asphalt uniaxial penetration test device of water-bath, a kind of experimental enviroment in addition to air bath, this process can control examination
Test the harmony and accuracy of temperature.
Claims (9)
1. a kind of asphalt uniaxial penetration test device of water bath with thermostatic control, which is characterized in that including water-bath work box (1),
Fog room (2), water-bath flow device (12), temperature sensor (13), heater (11), fixture (17), passes through operating platform (3)
Enter pressure head (19), UTM testing machine；The fog room (2), operating platform (3), water-bath flow device (12), temperature sensor
(13), heater (11) is arranged in work box (1)；The heater (11) and temperature sensor (13) are to control water-bath
Liquid (14) temperature in work box (1)；Liquid (14) of the water-bath flow device (12) to drive water-bath work box (1)
In flow regime；The fixture (17) is two, is symmetricly set on operating platform (3) upper end, operating platform (3) upper end is equipped with
Sliding slot, fixture (17) opposite sliding along the chute；It adjusts after two fixtures (17) step up test specimen, by bolt by two fixtures
(17) fixed with operating platform (3)；The injection pressure head (19) is arranged in test specimen upper end；The pressure head (20) of the UTM testing machine
In injection pressure head (19) upper end, the transmission rod (21) of UTM testing machine passes through the case lid of water-bath work box (1) upper end, power transmission for setting
Bar (21) can move up and down with respect to case lid, and be sealed between case lid and transmission rod (21) equipped with sealing element.
2. the asphalt uniaxial penetration test device of water bath with thermostatic control according to claim 1, which is characterized in that described
Fixture (17) semicircular in shape structure, arc surface are bonded with test specimen periphery.
3. the asphalt uniaxial penetration test device of water bath with thermostatic control according to claim 1, which is characterized in that described
Water-bath flow device (12) is motor-driven impeller.
4. the asphalt uniaxial penetration test device of water bath with thermostatic control according to claim 1, which is characterized in that described
Heater (11) includes the isolation cover (16) of adding thermal resistance (15) and setting in adding thermal resistance (15) outside.
5. the asphalt uniaxial penetration test device of water bath with thermostatic control according to claim 1, which is characterized in that also set
Have a purification device, the purification device include outlet pipe (10), control valve (5), the first filter device (8), filter chamber (6), into
Water pipe (4), recovery room (9)；Described outlet pipe (10) one end is connected with water-bath work box (1) lower end, the other end and filter chamber (6)
It is connected；The outlet pipe (10) is equipped with the first filter device (8), and the first filter device (8) bottom water pipe is equipped with recovery room
(9)；Filter chamber's (6) other end is connected with water inlet pipe (4), and water inlet pipe (4) is connected with water-bath work box (1) upper end；It is described
Water pump and the second filter device (7) are equipped in filter chamber (6), water pump passes through the water in water-bath work box (1) from outlet pipe (10)
First filter device (8) and filter chamber (6) filtering, are recycled to water-bath work box (1) through water inlet pipe (4)；The first filtering dress
(8) are set for the large granular impurity in filtration test water；Second filter device (7) is further in removal test water
Other impurities.
6. the asphalt uniaxial penetration test device of water bath with thermostatic control according to claim 1, which is characterized in that described
Recovery room (9) and water pipe are detachable structure.
7. the asphalt uniaxial penetration test device of water bath with thermostatic control according to claim 1, which is characterized in that described
First filter device (8) uses asbestos gauge.
8. the asphalt uniaxial penetration test device of water bath with thermostatic control according to claim 1, which is characterized in that described
Second filter device (7) uses porous solid material.
9. the asphalt uniaxial penetration test device of water bath with thermostatic control according to claim 1, which is characterized in that described
Case lid is spliced by two upper covers (22), and two upper cover (22) interphases pair are provided with semi-circular hole (23), semi-circular hole
(23) it is equipped in and does circular sealing ring as sealing element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811121700.0A CN109116003A (en) | 2018-09-26 | 2018-09-26 | A kind of asphalt uniaxial penetration test device of water bath with thermostatic control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811121700.0A CN109116003A (en) | 2018-09-26 | 2018-09-26 | A kind of asphalt uniaxial penetration test device of water bath with thermostatic control |
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|---|---|
| CN109116003A true CN109116003A (en) | 2019-01-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811121700.0A Pending CN109116003A (en) | 2018-09-26 | 2018-09-26 | A kind of asphalt uniaxial penetration test device of water bath with thermostatic control |
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| CN (1) | CN109116003A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117825673A (en) * | 2024-03-04 | 2024-04-05 | 迈赛凯尔(山东)生命科学有限公司 | Exosome detection device |
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Application publication date: 20190101 |