CN110243753A - A kind of bituminous cements coupling ageing test apparatus and method - Google Patents
A kind of bituminous cements coupling ageing test apparatus and method Download PDFInfo
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- 230000032683 aging Effects 0.000 title claims abstract description 126
- 239000004568 cement Substances 0.000 title claims abstract description 71
- 238000012360 testing method Methods 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims description 13
- 230000008878 coupling Effects 0.000 title abstract description 9
- 238000010168 coupling process Methods 0.000 title abstract description 9
- 238000005859 coupling reaction Methods 0.000 title abstract description 9
- 238000004088 simulation Methods 0.000 claims abstract description 54
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 52
- 238000010438 heat treatment Methods 0.000 claims abstract description 24
- 239000010426 asphalt Substances 0.000 claims abstract description 21
- 238000002604 ultrasonography Methods 0.000 claims abstract description 21
- 235000003140 Panax quinquefolius Nutrition 0.000 claims abstract description 9
- 240000005373 Panax quinquefolius Species 0.000 claims abstract description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000001301 oxygen Substances 0.000 claims abstract description 9
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 9
- 230000002706 hydrostatic effect Effects 0.000 claims abstract description 7
- 230000007613 environmental effect Effects 0.000 claims abstract description 5
- 230000007774 longterm Effects 0.000 claims description 34
- 230000015556 catabolic process Effects 0.000 claims description 32
- 238000006731 degradation reaction Methods 0.000 claims description 32
- 230000035515 penetration Effects 0.000 claims description 23
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- 230000033228 biological regulation Effects 0.000 claims description 9
- 238000002474 experimental method Methods 0.000 claims description 8
- 230000008859 change Effects 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 5
- 238000005485 electric heating Methods 0.000 claims description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 238000004590 computer program Methods 0.000 claims description 3
- 239000004973 liquid crystal related substance Substances 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 3
- 229910052786 argon Inorganic materials 0.000 claims description 2
- 238000005452 bending Methods 0.000 claims description 2
- 239000011521 glass Substances 0.000 claims description 2
- 239000003365 glass fiber Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 239000003973 paint Substances 0.000 claims description 2
- 239000010453 quartz Substances 0.000 claims description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims description 2
- 239000000853 adhesive Substances 0.000 claims 1
- 230000001070 adhesive effect Effects 0.000 claims 1
- 235000007164 Oryza sativa Nutrition 0.000 abstract description 8
- 235000009566 rice Nutrition 0.000 abstract description 8
- 238000005516 engineering process Methods 0.000 abstract description 2
- 240000007594 Oryza sativa Species 0.000 abstract 1
- 238000012544 monitoring process Methods 0.000 abstract 1
- 241000209094 Oryza Species 0.000 description 7
- 230000005611 electricity Effects 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical group ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000010408 film Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 229960002415 trichloroethylene Drugs 0.000 description 2
- UBOXGVDOUJQMTN-UHFFFAOYSA-N trichloroethylene Natural products ClCC(Cl)Cl UBOXGVDOUJQMTN-UHFFFAOYSA-N 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 230000003679 aging effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
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- 230000007812 deficiency Effects 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 244000144992 flock Species 0.000 description 1
- 239000003205 fragrance Substances 0.000 description 1
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- 238000011835 investigation Methods 0.000 description 1
- 125000003367 polycyclic group Chemical group 0.000 description 1
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- 238000009736 wetting Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
- G01N17/002—Test chambers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
- G01N17/004—Investigating resistance of materials to the weather, to corrosion, or to light to light
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Abstract
The invention discloses a kind of bituminous cements to couple ageing test apparatus, is related to asphalt performance the field of test technology.Bituminous cements coupling ageing test apparatus therein includes control system, multi-environment medium simulation system and Sheng sample system.The invention discloses a kind of bituminous cements to couple aging testing method, aging mode, monitoring aging condition are selected by control system, control ultrasound fluctuation water bath in multi-environment medium simulation box, electric heat type humidifier, multiple wing type centrifugal fan, ultraviolet light simulation lamp, heating wire and temperature and humidity controller Collaboration, the influences of the environmental factors to bituminous cements aging rice seed such as temperature in nature, ultraviolet light, oxygen, dynamic water, hydrostatic are simulated simultaneously, and Aging simulation result in bituminous cements room is made more to meet the duty status of practical bituminous pavement.
Description
Technical field
The present invention relates to a kind of bituminous cements coupling ageing test apparatus and methods, belong to asphalt performance measuring technology neck
Domain.
Background technique
Bituminous cements refining, storage, transport, making, use etc. durings, by high temperature, ultraviolet light, oxygen gas and water
Etc. factors influence, pitch aoxidizes, light components volatilization, causes its viscosity to rise, needle penetration reduces, ductility significantly drops
It is low, to seriously affect the service life of bituminous pavement, therefore research is carried out with great to bituminous cements aging rice seed
Meaning.
Carrying out indoor Aging simulation to bituminous cements at present generally uses thin film oven, pressure ageing device, ultraviolet light old
Change experimental rigs and the methods such as instrument.Above-mentioned apparatus and method can only be simulated to be made at single environment medium (temperature, oxygen or ultraviolet light)
Bituminous cements aging rice seed under the conditions of, and true bituminous pavement is irradiated by high temperature, ultraviolet light simultaneously when being on active service, oxygen
The multi-environment medium couples aging actions such as change, immersion wetting and rain drop erosion, this results in currently used bituminous cements room
Interior degradation can not the accurate practical bituminous pavement of simulation working environment, there are biggish differences for indoor and outdoor tests result
Property.Therefore, when carrying out the research of bituminous cements aging rice seed, multi-environment medium couples effect can be simulated by needing to establish one kind
Indoor ageing test apparatus and method.
Summary of the invention
Technical problem to be solved by the present invention lies in overcome the deficiencies of the prior art and provide a kind of bituminous cements coupling
Ageing test apparatus and method are closed, which can reflect temperature in nature, ultraviolet light, oxygen, dynamic water, hydrostatic simultaneously
Etc. environmental factors influence, realize that multi-environment medium couples act on the accurate simulation of lower bituminous cements aging rice seed, make its room
Interior test result more meets the duty status of practical bituminous pavement.
The present invention solves above-mentioned technical problem using following technical scheme:
A kind of bituminous cements coupling ageing test apparatus, which is characterized in that simulated including control system, multi-environment medium
System and Sheng sample system, experimental rig are outer dimension (deep × wide × high) 700mm × 1120mm × 1200mm cuboid box
Body.
The control system includes display (1) and station (2).Display (1) is LED liquid-crystal display, setting value
It is shown with actual value even numbers；Button uses waterproof leakproof eletric button, including power knob, short ageing mode in station (2)
Button, long-term ageing mode button, emergency stop button and test parameters adjust and select button.
The multi-environment medium simulation system includes multi-environment medium simulation box (3), ultrasound fluctuation water bath (4), electric heating
Formula humidifier (5), multiple wing type centrifugal fan (6), heating wire (7), ultraviolet radiator (8) and temperature and humidity controller (9).Multi-environment Jie
Matter simulation box (3) uses three-layer composite structure.Outer wall is using the cold steel plate of high-quality A3# and covers environmental protection paint；Inner wall uses stainless steel
Plate, metal plate bending, argon arc welding form；Centre uses glass fibre insulating sandwich.Internal work chamber size be (it is deep × wide ×
It is high) 500mm × 750mm × 950mm.The dynamic water of water bath (4) simulation, which is fluctuated, by ultrasound washes away aging condition；By electrothermal plus
Wet device (5) simulation hydrostatic moistens aging condition；Simulation high temperature ageing condition is heated by heating wire (7)；Pass through multiple wing type centrifugal
Fan (6) circulation air provides oxygen aging condition and adjusts the temperature and humidity condition in multi-environment medium simulation box (3)；It is logical
Cross ultraviolet radiator (8) omnidirectional simulation ultraviolet ray ageing condition；Air themperature and wet is acquired by temperature and humidity controller (9)
Degree evidence, and pass through computer program automatic controlled electric heating formula humidifier (5), multiple wing type centrifugal fan (6) and heating wire (7)
Running.
The Sheng sample system includes motor (10), transmission shaft (11) and contains sample platform (12).Motor (10) is arranged more
At the top of surrounding medium simulation box (3), transmission shaft (11) and Sheng sample platform (12) are driven to be rotated and gone up and down by motor (10).
The rounded porous steel plate that sample platform (12) are diameter 315mm is contained, the upper opening mold of eight diameter 53mm can be fixed on platform.Contain sample
Platform (12) speed of rotation is 5.5r/min, and ramp rate 15mm/s, heave amplitude is to fluctuate water bath (4) bottom away from ultrasound
70mm-170mm, is elevated to top every time and bottom end is respectively paused 10s.
Further, aging mode includes short ageing mode and long-term ageing mode.When selecting short ageing mode,
Temperature levels set by air themperature to short ageing are heated and kept by heating wire (7), are passed through multiple wing type centrifugal fan (6)
Air circulation is carried out, sample platform (12) is contained and is rotated simultaneously.When selecting long-term ageing mode, short ageing is first carried out, then
Heating wire (7) shuts down, and reduces temperature levels set by air themperature to long-term ageing in multi-environment medium simulation box (3)；
150mm graduation mark is filled in ultrasound fluctuation water bath (4) and is heated to the level of water temperature set by long-term ageing；Electrothermal adds
Wet device (5) is operated, and relative humidity is kept to reach setting humidity level；Ultraviolet radiator (8) irradiation is carried out by selected wavelength；
Sample platform (12) are contained to be rotated and gone up and down simultaneously.
Further, ultrasound fluctuation water bath (4) is located at multi-environment medium simulation box (3) bottom, including ultrasonic wave occurs
Device (13), ultrasonic transducer (14) and constant water bath box (15).Supersonic generator (13) connects ultrasound by aviation plug
Wave transducer (14), ultrasonic transducer (14) are tightly attached to the bottom surface of constant water bath box (15).Supersonic generator (13) is city
Electricity is converted into the high-frequency ac electric signal to match with ultrasonic transducer (14), driving ultrasonic transducer (14) work.It is super
The electrical power of input is converted into ultrasonic wave and constant water bath box (15) interior water body is driven to vibrate by acoustic wave transducer (14), ultrasonic wave frequency
Rate reaches as high as 40kHz.Constant water bath box (15) can be stored having a size of (deep × wide × high) 400mm × 400mm × 200mm, maximum
Water 32L；Heater strip (16) and temperature inductor (17) are inside set, reaches setting level to control water temperature.
Further, electric heat type humidifier (5) and multiple wing type centrifugal fan (6) are respectively positioned on multi-environment medium simulation box (3)
Bottom is arranged symmetrically in ultrasound fluctuation water bath (4) left and right sides, respectively away from each 20mm of left and right side inner wall.Electric heat type humidifier
(5) relative humidity maximum is adjusted up to 95%.Multiple wing type centrifugal fan (6) is driven using high temperature resistant long axis motor, forces sky
Gas recycles rapidly, so that temperature and humidity be made to be uniformly distributed, air quantity maximum is up to 5.70m3/min.Heating wire (7) is located at polycyclic
Inner wall on the right side of border medium simulation box (3), can heat the interior air of multi-environment medium simulation box (3) and be up to 220 DEG C.Pass through temperature and humidity
Temperature and moisture sensors in controller (9) carry out the interior air themperature of multi-environment medium simulation box (3) and humidity data respectively
Acquisition；By Jess language editor, logical relation, the control to collected air themperature and humidity data and setting are set
Target processed is compared judgement；It is realized by the output relay in temperature and humidity controller (9) to electrothermal according to judging result
The automation control of humidifier (5), multiple wing type centrifugal fan (6) and heating wire (7), to guarantee multi-environment medium simulation box
(3) internal air themperature and humidity remain within the scope of setting target allowable error.
Further, ultraviolet radiator (8) includes the UVA-340 fluorescent tube of two 100W and the UVB-313 fluorescent tube of two 100W,
Fluorescent tube uses nanometer anti-fog glass protection shell resistant to high temperature.The quartz burner of totally four different wave lengths is arranged in multi-environment Jie
In matter simulation box (3) top inner wall, fluorescent tube parallel equidistant arrangement, adjacent lamps tube hub spacing 110mm, to guarantee that ultraviolet light irradiates
Uniformly.Different wave length fluorescent tube is interlaced, can be selected by control system.
Further, the test method of a kind of bituminous cements coupling ageing test apparatus above-mentioned, comprising the following steps:
Step 1 determines short ageing temperature according to pitch type；According to regional meteorological data, including temperature, annual drop
Rainfall, relative air humidity and uitraviolet intensity, determine test needed for long-term ageing temperature, ultrasonic frequency, relative humidity,
Ultraviolet wavelength.
Step 2, according to " highway engineering pitch and Asphalt Mixture Experiment regulation " " JTG E20-2011 " T 0602-2011
Test method prepares eight bitumen samples, and each sample is the asphalt film of 3.2mm uniform thickness, and quality is 50g ± 0.5g.
Step 3, respectively according to " highway engineering pitch and Asphalt Mixture Experiment regulation " " JTG E20-2011 " T 0604-
2011, needle penetration, softening point and the ductility before T 0606-2011 and T 0605-2011 measurement bituminous cements degradation.
Whole molds are fixed to and contain on sample platform (12) by step 4, set short ageing temperature, long-term old in station (2)
Change temperature, ultrasonic frequency, relative humidity, ultraviolet radiator wavelength.Short ageing mode button is clicked, temperature and humidity controller is started
(9), heating wire (7) begins to warm up and keeps air themperature to short ageing temperature levels.Multiple wing type centrifugal fan (6) carries out empty
Gas circulation, contains the rotary motion that sample platform (12) carry out 5.5r/min simultaneously, and bitumen samples continue aging 85min.Short ageing is complete
Cheng Hou contains sample platform (12) and stops operating.Four in eight molds are taken out at interval, scrape and mix into a clean container.
Step 5 is filled to 150mm graduation mark in ultrasound fluctuation water bath (4).Click long-term ageing mode button, electricity
Heated filament (7), multiple wing type centrifugal fan (6) and constant water bath box (15) start to adjust and keep air and water temperature to long-term ageing temperature
Degree is horizontal, and electric heat type humidifier (5) adjusts and keeps air to relative humidity level, and ultraviolet radiator (8) is irradiated.Contain sample platform
(12) rotation of 5.5r/min and the lifting of 15mm/s are carried out simultaneously, and bitumen samples are persistently aged to setting time.Long-term ageing
After the completion, all devices stop working.Remaining four molds are taken out, sample is scraped in a clean container and is mixed.
Step 6, respectively according to " highway engineering pitch and Asphalt Mixture Experiment regulation " " JTG E20-2011 " T 0604-
Needle penetration after 2011, T 0606-2011 and T 0605-2011 sequentially determining bituminous cements be short-term and long-term aging test,
Softening point and ductility.The residual penetration ratio of bituminous cements after short ageing and long-term ageing, residual softening is calculated as follows
Point ratio and residual Ductility ratio.
KP--- residue penetration ratio (%) after bituminous cements degradation；
P1--- the needle penetration (0.1mm) of original sample before bituminous cements degradation；
P2--- the needle penetration (0.1mm) of residue after bituminous cements degradation.
KT--- residue softening point ratio (%) after bituminous cements degradation；
T1--- the softening point (DEG C) of original sample before bituminous cements degradation；
T2--- the softening point (DEG C) of residue after bituminous cements degradation.
KD--- residue Ductility ratio (%) after bituminous cements degradation；
D1--- the ductility (cm) of original sample before bituminous cements degradation；
D2--- the ductility (cm) of residue after bituminous cements degradation.
Compared with prior art, the invention has the following advantages:
High temperature, dynamic water, hydrostatic, purple may be implemented in a kind of bituminous cements coupling ageing test apparatus and method
The multi-environment medium couples such as outside line, oxygen act on the simulation of lower bituminous cements aging rice seed；Short ageing can individually be carried out
Mode successively carries out short ageing and long-term ageing mode, with simulate bituminous cements refining, storage, transport, pave,
The aging rice seed in stages life-cycles such as military service.According to the difference of bituminous cements property, there are two types of the ultraviolet radiator of different wave length
It is available；According to rainfall intensity, ultrasound fluctuation water bath can select suitable ultrasonic frequency within the scope of 0-40kHz,
To which accurate simulation moves the influence that water washes away；Temperature and humidity controller is to electric heat type humidifier, multiple wing type centrifugal fan and electric heating
Silk carries out automation control, guarantees that air themperature and humidity inside multi-environment medium simulation box remain at setting target and permit
Perhaps in error range.Equipment safety is reliable, easy to operate, long service life, is convenient for promoting the use of, to bituminous cements aging row
For research it is more scientific, comprehensive.
Detailed description of the invention
In order to illustrate more clearly of aging equipment of the present invention and method, the statement in embodiment will be carried out with attached drawing below
It simplys illustrate.
Fig. 1 is that bituminous cements couples ageing test apparatus schematic diagram of internal structure.
Specific embodiment
Below in conjunction with attached drawing, experimental rig of the present invention and method are clearly and completely described.
The material and instrument that the present embodiment uses include: 1.SBS modified pitch.2. one, baking oven.3. pitch sample holder ware.
4. bituminous cements couples ageing test apparatus one.5. penetrometer one.6. ductility machine one.7. softening point tester one
Platform.
Fig. 1 is that bituminous cements couples ageing test apparatus schematic diagram of internal structure, including control system, multi-environment medium
Simulation system and Sheng sample system.
Control system includes display (1) and station (2).Display (1) is LED liquid-crystal display, setting value and reality
Actual value even numbers is shown；In station (2) button use waterproof leakproof eletric button, including power knob, short ageing mode button,
Long-term ageing mode button, emergency stop button and test parameters adjust and select button.
Multi-environment medium simulation system includes multi-environment medium simulation box (3), ultrasound fluctuates water bath (4), electrothermal adds
Wet device (5), multiple wing type centrifugal fan (6), heating wire (7), ultraviolet radiator (8) and temperature and humidity controller (9).It is fluctuated by ultrasound
Water bath (4) simulates dynamic water and washes away aging condition；Hydrostatic, which is simulated, by electric heat type humidifier (5) moistens aging condition；Pass through electricity
Heated filament (7) heating simulation high temperature ageing condition；Oxygen aging condition is provided by multiple wing type centrifugal fan (6) circulation air and is adjusted
Save the temperature and humidity condition in multi-environment medium simulation box (3)；It is old that ultraviolet light is simulated by ultraviolet radiator (8) omnidirectional
Change condition；Air themperature and humidity data are acquired by temperature and humidity controller (9), and passes through computer program automatic controlled electric heating
The running of formula humidifier (5), multiple wing type centrifugal fan (6) and heating wire (7).
Sample system is contained to include motor (10), transmission shaft (11) and contain sample platform (12).
Specific steps are as follows:
Step 1, selection SBS modified pitch, so short ageing temperature is set to 163 DEG C, investigation obtains meteorological data, including
Temperature, average annual rainfall, relative air humidity and uitraviolet intensity, environmental parameter needed for determining test are as follows: long-term ageing
83 DEG C of temperature；Ultrasonic frequency 40kHz；Relative humidity 93%；Ultraviolet wavelength UVB-313.
Step 2 after mold wash, will be set in 105 DEG C of ± 0.5 DEG C of baking ovens with gasoline or trichloro ethylene and be dried, and in drying
Number claims its quality after cooling in device, accurately to 1mg.Equipment is adjusted into level, according to " highway engineering pitch and asphalt
Testing regulations " the required eight SBS modified pitch samples of " JTG E20-2011 " T 0602-2011 preparation test, it is injected separately into
Claim in quality mold, quality is 50g ± 0.5g, and forms the asphalt film of 3.2mm uniform thickness, is cooled to room temperature.
Step 3, according to " highway engineering pitch and Asphalt Mixture Experiment regulation " " JTG E20-2011 " T 0604-
2011, T 0606-2011 and T 0605-2011 measures the needle penetration before SBS modified pitch degradation, softening point respectively and prolongs
Degree.
Step 4, air themperature, preheating are no less than 2h, make air themperature in cabinet in preheating cabinet at 163 DEG C ± 0.5 DEG C
Homogeneous heating starts temperature and humidity controller (9).Whole molds are fixed to and are contained on sample platform (12), multi-environment medium simulation is closed
Case (3) chamber door.Station (2) set 163 DEG C of short ageing temperature, 83 DEG C of long-term ageing temperature, ultrasonic frequency 40kHz,
Relative humidity 93% selects UVB-313 ultraviolet radiator (8).Short ageing mode button is clicked, heating wire (7) is begun to warm up simultaneously
Keep air themperature to 163 DEG C ± 0.5 DEG C.Multiple wing type centrifugal fan (6) carries out air circulation, contains sample platform (12) and carries out simultaneously
The rotary motion of 5.5r/min.At a temperature of aging 85min of the bitumen samples at 163 DEG C ± 0.5 DEG C.After arrival time, sample platform is contained
(12) it stops operating, opens multi-environment medium simulation box (3) chamber door, four in eight molds are taken out at interval, scrape into a cleaning
Container in mix, in case measurement short ageing test after needle penetration, softening point and ductility.
Step 5 is filled to 150mm graduation mark in ultrasound fluctuation water bath (4), closes multi-environment simulation box (3) chamber door.
Long-term ageing mode button is clicked, heating wire (7) and multiple wing type centrifugal fan (6) start to adjust and keep air themperature to 83 DEG C
± 0.5 DEG C, constant water bath box (15) heats and keeps water temperature to 83 DEG C ± 0.5 DEG C, and electric heat type humidifier (5) adjusts and keeps phase
Humidity to 93%, UVB-313 ultraviolet radiator (8) is irradiated.Contain sample platform (12) simultaneously carry out 5.5r/min rotation and
The lifting of 15mm/s, aging are automatically stopped after continuing 72h.After the completion of long-term ageing, equipment stops working.Open multi-environment medium
Simulation box (3) chamber door takes out remaining four molds, and scrapes in a clean container sample mix rapidly, in case measurement length
Needle penetration, softening point and ductility after phase degradation.
Step 6 closes power supply, empties water in ultrasound fluctuation water bath (4), cleans mold, repairing experiment with trichloro ethylene
Equipment closes chamber door after multi-environment medium simulation box (3) temperature drops to room temperature.According to " highway engineering pitch and pitch are mixed
Closing material testing regulations " " JTG E20-2011 " T 0604-2011, T 0606-2011 and T 0605-2011 sequentially determining SBS change
Property needle penetration, softening point and ductility after pitch is short-term and long-term aging test.Short ageing and long-term ageing is calculated as follows
The residual penetration ratio of bituminous cements, residual softening point ratio and residual Ductility ratio afterwards.
KP--- residue penetration ratio (%) after bituminous cements degradation
P1--- the needle penetration (0.1mm) of original sample before bituminous cements degradation
P2--- the needle penetration (0.1mm) of residue after bituminous cements degradation
KT--- residue softening point ratio (%) after bituminous cements degradation
T1--- the softening point (DEG C) of original sample before bituminous cements degradation
T2--- the softening point (DEG C) of residue after bituminous cements degradation
KD--- residue Ductility ratio (%) after bituminous cements degradation
D1--- the ductility (cm) of original sample before bituminous cements degradation
D2--- the ductility (cm) of residue after bituminous cements degradation
The different ageing step SBS modified pitch conventional indexs of table 1
Table 1 be as former state, after short ageing and after long-term ageing SBS modified pitch needle penetration, softening point and ductility test
As a result.As can be seen from the test results, SBS modified pitch is under every pavement performance index occurs substantially after short ageing
Drop, needle penetration and ductility have dropped 17% and 32.1% respectively, and softening point increases 4.4%.Its needle enters after long-term ageing
Degree and ductility have dropped 10.4% and 10.2% respectively again, and softening point increases 4.7% again.Test result meets modified pitch
After aging, decentralized medium fragrance point is reduced, and asphalitine gradually increases, and flocks together, and hard crisp state is presented in pitch, is led
Cause the agine mechaism of traditional performance decline.
Compared with prior art, a kind of bituminous cements coupling ageing test apparatus of the present invention and method, increase
The influence of temperature, oxygen, different wave length ultraviolet light, a series of dynamic surrounding mediums such as water and hydrostatic, is more in line with bituminous pavement
Practical duty status, can more scientific and comprehensive simulation bituminous cements aging rice seed.
In addition to the implementation, the present invention can also have other embodiments.It is all to use equivalent substitution or equivalent transformation shape
At technical solution, all fall within protection scope of the present invention.
Claims (9)
1. a kind of bituminous cements couples ageing test apparatus, which is characterized in that including control system, multi-environment medium simulation system
System and Sheng sample system, experimental rig are outer dimension (deep × wide × high) 700mm × 1120mm × 1200mm rectangular box body.
2. bituminous cements according to claim 1 couples ageing test apparatus, which is characterized in that the control system packet
Include display (1) and station (2).Display (1) is LED liquid-crystal display, and setting value and actual value even numbers are shown, station
(2) button uses waterproof leakproof eletric button in, including power knob, short ageing mode button, long-term ageing mode button, tight
Anxious stop button and test parameters adjusting and select button.
3. bituminous cements according to claim 1 couples ageing test apparatus, which is characterized in that the multi-environment medium
Simulation system includes multi-environment medium simulation box (3), ultrasound fluctuation water bath (4), electric heat type humidifier (5), multiple wing type centrifugal
Fan (6), heating wire (7), ultraviolet radiator (8) and temperature and humidity controller (9).Multi-environment medium simulation box (3) is multiple using three layers
Close structure.Outer wall is using the cold steel plate of high-quality A3# and covers environmental protection paint；Inner wall use stainless steel plate, metal plate bending, argon arc welding and
At；Centre uses glass fibre insulating sandwich.Internal work chamber size is (deep × wide × high) 500mm × 750mm × 950mm.
The dynamic water of water bath (4) simulation, which is fluctuated, by ultrasound washes away aging condition；Hydrostatic, which is simulated, by electric heat type humidifier (5) moistens aging
Condition；Simulation high temperature ageing condition is heated by heating wire (7)；It is old that oxygen is provided by multiple wing type centrifugal fan (6) circulation air
Change condition and adjust the temperature and humidity condition in multi-environment medium simulation box (3)；Pass through ultraviolet radiator (8) omnidirectional
Simulate ultraviolet ray ageing condition；Air themperature and humidity data are acquired by temperature and humidity controller (9), and passes through computer program
The running of automatic controlled electric heating formula humidifier (5), multiple wing type centrifugal fan (6) and heating wire (7).
4. bituminous cements according to claim 1 couples ageing test apparatus, which is characterized in that the Sheng sample system packet
It includes motor (10), transmission shaft (11) and contains sample platform (12).Motor (10) is arranged at the top of multi-environment medium simulation box (3),
Transmission shaft (11) and Sheng sample platform (12) are driven to be rotated and gone up and down by motor (10).Containing sample platform (12) is diameter 315mm
Rounded porous steel plate, the upper opening mold of eight diameter 53mm can be fixed on platform.Sheng sample platform (12) speed of rotation is 5.5r/
Min, ramp rate 15mm/s, heave amplitude are to fluctuate water bath (4) bottom 70mm-170mm away from ultrasound, are elevated to top every time
Respectively pause 10s for end and bottom end.
5. bituminous cements according to claim 2 couples ageing test apparatus, which is characterized in that the aging mode packet
Include short ageing mode and long-term ageing mode.When selecting short ageing mode, air is heated and kept by heating wire (7)
Temperature levels set by temperature to short ageing carry out air circulation by multiple wing type centrifugal fan (6), contain sample platform (12) simultaneously
It is rotated.When selecting long-term ageing mode, short ageing is first carried out, then heating wire (7) shuts down, and reduces multi-environment
Temperature levels set by air themperature to long-term ageing in medium simulation box (3)；It is filled in ultrasound fluctuation water bath (4)
150mm graduation mark is simultaneously heated to the level of water temperature set by long-term ageing；Electric heat type humidifier (5) is operated, and is kept relatively wet
Degree reaches setting humidity level；Ultraviolet radiator (8) irradiation is carried out by selected wavelength；Sample platform (12) are contained to be rotated and risen simultaneously
Drop.
6. bituminous cements according to claim 3 couples ageing test apparatus, which is characterized in that the ultrasound wave water
Bath cabinet (4) is located at multi-environment medium simulation box (3) bottom, including supersonic generator (13), ultrasonic transducer (14) and perseverance
Warm water bath cabinet (15).Supersonic generator (13) connects ultrasonic transducer (14) by aviation plug, ultrasonic transducer
(14) it is tightly attached to the bottom surface of constant water bath box (15).Supersonic generator (13) is converted into alternating current and ultrasonic transducer (14)
The high-frequency ac electric signal to match, driving ultrasonic transducer (14) work.Electric work of the ultrasonic transducer (14) input
Rate is converted into ultrasonic wave and drives constant water bath box (15) interior water body vibration, and ultrasonic frequency reaches as high as 40kHz.Constant water bath box
(15) having a size of (deep × wide × high) 400mm × 400mm × 200mm, maximum can water storage 32L；Inside set heater strip (16) and temperature
Inductor (17) reaches setting level to control water temperature.
7. bituminous cements according to claim 3 couples ageing test apparatus, it is characterised in that: the electrothermal humidification
Device (5) and multiple wing type centrifugal fan (6) are respectively positioned on multi-environment medium simulation box (3) bottom, are arranged symmetrically in ultrasound fluctuation water-bath
Case (4) left and right sides, respectively away from each 20mm of left and right side inner wall.It is reachable that relative humidity maximum is adjusted in electric heat type humidifier (5)
95%.Multiple wing type centrifugal fan (6) is driven using high temperature resistant long axis motor, and air is forced to recycle rapidly, to make temperature and wet
Degree is uniformly distributed, and air quantity maximum is up to 5.70m3/min.Heating wire (7) is located at inner wall on the right side of multi-environment medium simulation box (3), can
It heats the interior air of multi-environment medium simulation box (3) and is up to 220 DEG C.It is passed by the temperature and humidity in temperature and humidity controller (9)
Sensor carries out the interior air themperature of multi-environment medium simulation box (3) and humidity data acquisition respectively；By Jess language editor,
Logical relation is set, judgement is compared with the control target of setting to collected air themperature and humidity data；According to sentencing
Disconnected result is realized by the output relay in temperature and humidity controller (9) to electric heat type humidifier (5), multiple wing type centrifugal fan
(6) and the automation control of heating wire (7), to guarantee that the internal air themperature of multi-environment medium simulation box (3) and humidity begin
It is maintained within the scope of setting target allowable error eventually.
8. bituminous cements according to claim 3 couples ageing test apparatus, which is characterized in that the ultraviolet radiator
(8) include two 100W UVA-340 fluorescent tube and two 100W UVB-313 fluorescent tube, fluorescent tube use nanometer anti-fog resistant to high temperature
Glass protection shell.The quartz burner of totally four different wave lengths is arranged in multi-environment medium simulation box (3) top inner wall, lamp
Pipe parallel equidistant arrangement, adjacent lamps tube hub spacing 110mm, to guarantee that ultraviolet light irradiation is uniform.Different wave length fluorescent tube is mutually handed over
Mistake can be selected by control system.
9. a kind of bituminous cements couples aging testing method, which is characterized in that be based on a kind of asphalt adhesive described in claim 1
Ramming material couples ageing test apparatus, comprising the following steps:
Step 1 determines short ageing temperature according to pitch type；According to regional meteorological data, including temperature, average annual rainfall
Amount, relative air humidity and uitraviolet intensity, long-term ageing temperature, ultrasonic frequency, relative humidity, purple needed for determining test
Outside line wavelength.
Step 2 is tested according to " highway engineering pitch and Asphalt Mixture Experiment regulation " " JTG E20-2011 " T 0602-2011
Method prepares eight bitumen samples, and each sample is the asphalt film of 3.2mm uniform thickness, and quality is 50g ± 0.5g.
Step 3, respectively according to " highway engineering pitch and Asphalt Mixture Experiment regulation " " JTG E20-2011 " T 0604-
2011, needle penetration, softening point and the ductility before T 0606-2011 and T 0605-2011 measurement bituminous cements degradation.
Whole molds are fixed to and contain on sample platform (12) by step 4, set short ageing temperature, long-term ageing temperature in station (2)
Degree, ultrasonic frequency, relative humidity, ultraviolet radiator wavelength.Short ageing mode button is clicked, is started temperature and humidity controller (9),
Heating wire (7) begins to warm up and keeps air themperature to short ageing temperature levels.Multiple wing type centrifugal fan (6) carries out air and follows
Ring, contains the rotary motion that sample platform (12) carry out 5.5r/min simultaneously, and bitumen samples continue aging 85min.After the completion of short ageing,
Sample platform (12) are contained to stop operating.Four in eight molds are taken out at interval, scrape and mix into a clean container.
Step 5 is filled to 150mm graduation mark in ultrasound fluctuation water bath (4).Click long-term ageing mode button, heating wire
(7), multiple wing type centrifugal fan (6) and constant water bath box (15) start to adjust and keep air and water temperature to long-term ageing temperature water
Flat, electric heat type humidifier (5) adjusts and keeps air to relative humidity level, and ultraviolet radiator (8) is irradiated.It contains sample platform (12)
The rotation of 5.5r/min and the lifting of 15mm/s are carried out simultaneously, and bitumen samples are persistently aged to setting time.Long-term ageing is completed
Afterwards, all devices stop working.Remaining four molds are taken out, sample is scraped in a clean container and is mixed.
Step 6, respectively according to " highway engineering pitch and Asphalt Mixture Experiment regulation " " JTG E20-2011 " T 0604-
Needle penetration after 2011, T 0606-2011 and T 0605-2011 sequentially determining bituminous cements be short-term and long-term aging test,
Softening point and ductility.The residual penetration ratio of bituminous cements after short ageing and long-term ageing, residual softening is calculated as follows
Point ratio and residual Ductility ratio.
KP--- residue penetration ratio (%) after bituminous cements degradation；
P1--- the needle penetration (0.1mm) of original sample before bituminous cements degradation；
P2--- the needle penetration (0.1mm) of residue after bituminous cements degradation.
KT--- residue softening point ratio (%) after bituminous cements degradation；
T1--- the softening point (DEG C) of original sample before bituminous cements degradation；
T2--- the softening point (DEG C) of residue after bituminous cements degradation.
KD--- residue Ductility ratio (%) after bituminous cements degradation；
D1--- the ductility (cm) of original sample before bituminous cements degradation；
D2--- the ductility (cm) of residue after bituminous cements degradation.
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| CN111307702A (en) * | 2020-04-15 | 2020-06-19 | 长安大学 | Method for simulating long-term aging of asphalt pavement |
| CN112255168A (en) * | 2020-11-25 | 2021-01-22 | 江苏众智交通创新产业研究院有限公司 | Ultraviolet ray aging resistance testing method for modified asphalt |
| CN112517888A (en) * | 2020-12-08 | 2021-03-19 | 大冶市安实模具科技有限公司 | Preheating device for metal mold of cast ball production line |
| CN112683767A (en) * | 2020-12-24 | 2021-04-20 | 南京林业大学 | Asphalt indoor aging method under heat-light-water coupling circulation effect |
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| CN113109241A (en) * | 2021-03-22 | 2021-07-13 | 北京工业大学 | Asphalt accelerated aging test device for simulating all-weather multi-environment coupling effect |
| CN114235670A (en) * | 2021-11-29 | 2022-03-25 | 郑州大学 | Asphalt ultraviolet aging test method with control group |
| CN114235670B (en) * | 2021-11-29 | 2024-05-07 | 郑州大学 | Asphalt ultraviolet aging test method with control group |
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Application publication date: 20190917 |