CN109596440A - A kind of evaluation method of asphalt temperature fatigue behaviour - Google Patents
A kind of evaluation method of asphalt temperature fatigue behaviour Download PDFInfo
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- CN109596440A CN109596440A CN201910076537.9A CN201910076537A CN109596440A CN 109596440 A CN109596440 A CN 109596440A CN 201910076537 A CN201910076537 A CN 201910076537A CN 109596440 A CN109596440 A CN 109596440A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/20—Investigating strength properties of solid materials by application of mechanical stress by applying steady bending forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0005—Repeated or cyclic
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0023—Bending
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0073—Fatigue
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0222—Temperature
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0222—Temperature
- G01N2203/0228—Low temperature; Cooling means
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Abstract
The invention discloses a kind of evaluation methods of asphalt temperature fatigue behaviour, four-point bending intensity and fatigue test are carried out to test specimen using multifunctional material pilot system (MTS-Landmark), utilize the temperature cycles period of low frequency loading method simulation asphalt temperature fatigue.The present invention is based on speed related stress ratios, establish the fatigue equation of asphalt under the conditions of low temperature and low frequency, and it finds than thought asphalt Strength Failure and Fatigue Failures to be unified using speed related stress of the invention, realize the normalization of fatigue performance of asphalt mixture under the conditions of low temperature and low frequency, to provide theoretical foundation for the temperature fatigue performance of accurate Prediction of Asphalt Mixture, while reference is provided for the design of durable asphalt pavement.
Description
Technical field
The invention belongs to technical field of road engineering more particularly to a kind of evaluation sides of asphalt temperature fatigue behaviour
Method.
Background technique
Bituminous pavement has become main Pavement Structure all over the world with its excellent performance, and nearly 90% road is adopted
Use asphalt as primary building material.Fatigue damage is one of most important disease in bituminous pavement, it includes the period
Property traffic loading under fatigue damage and periodic temperature change caused by fatigue damage.Due to fatigue damage, bituminous pavement
Reduced service life just accelerates the decline of road surface service quality, seriously threatens the safety of traffic.By improving bituminous pavement
Anti-fatigue performance, prolonging service life of pavement is always road worker focus of attention, and in recent decades, it is in world's model
It is received significant attention in enclosing.
Asphalt for bituminous pavement is a kind of typical viscoelastic material, rigidity, intensity and fatigue resistance
It can be influenced by loading frequency and temperature significant.Someone is under the fatigue test of Stress Control mode, and discovery is by reducing pitch
Fatigue life can be improved in the temperature of mixture.Someone has found the fatigue life meeting of girder sample under identical stress level
It reduces as the temperature rises, when temperature is higher, the fatigue of bituminous pavement develops the ratio for accounting for entire fatigue life in the service life
It is higher.Someone is based on Stress Control mode under the conditions of 20 DEG C and 30 DEG C of temperature, find fatigue life of asphalt with
Loading frequency it is in exponential increase.Also someone has carried out four_point bending beam fatigue test using strain controlling loading mode, discovery
The increase of loading frequency causes the fatigue life of asphalt to shorten.
Although existing research is done in terms of the anti-fatigue performance for improving asphalt for the development of bituminous pavement design
Significant contribution is gone out, but the fatigue properties research of most of asphalts is implemented at high loading frequency (1-25Hz etc.)
's.However, even if the laboratory test of high loading frequency can be used for simulating the fatigue properties of bituminous pavement under action of traffic loading,
But the period under temperature cycles load action is very long, and intraday mean temperature is lower, especially northern China
The temperature in area is lower, and being accordingly used in simulating is low-down to the frequency of bituminous pavement temperature fatigue, and temperature is also relatively low
's.
In addition, the temperature fatigue characteristic research for asphalt is easily ignored by researchers, corresponding research rarely has
People's report.The loading frequency of temperature fatigue is far below the fatigue of action of traffic loading, and its feature is low frequency (long period), this
It is the notable difference between temperature fatigue and traffic loading fatigue.According to reported literature, fatigue of the low loading frequency to asphalt material
Service life has a significant impact, it is therefore necessary to the temperature fatigue performance of Research on Asphalt Mixture.
Summary of the invention
In view of this, the present invention provides a kind of evaluation methods of asphalt temperature fatigue behaviour.By to pitch
Mixture temperature fatigue results are analyzed, and have not only reached the purpose to the evaluation of asphalt temperature fatigue properties, and
The normalization of asphalt temperature fatigue behaviour under the conditions of low temperature and low frequency is realized, while being accurate Prediction of Asphalt Mixture
Temperature fatigue performance provides theoretical basis.
To achieve the goals above, the invention provides the following technical scheme:
A kind of evaluation method of asphalt temperature fatigue behaviour, the evaluation method specifically comprise the following steps:
(1) bending strength test of different loading speeds, different temperatures is carried out to asphalt；
(2) different loading speeds, the repeated bend test of different temperatures are carried out to asphalt.
It should be noted that American Highway strategic research plan (SHRP) comparative analysis uses different fatigue test method
The test result of fatigue performance of asphalt mixture is evaluated, and thinks that four-point bending fatigue test is better than in terms of assessing fatigue behaviour
Other test methods, it is proposed that evaluate the fatigue behaviour of asphalt as the standard test method of fatigue test, therefore this hair
The bright Test Method of Fatigue Behavior used is four-point bending fatigue test.Wherein intensity, fatigue test method specifically include as follows
Step:
Step 1: use the mineral aggregate through successively sieving, and by load weighted mineral aggregate put in an oven preheat 4 hours so that
Mineral aggregate is sufficiently dried, and adds mineral aggregate in agitated kettle every time or pitch stirs 90 seconds so as to gather materials and is uniformly mixing to obtain pitch mixing
Material；And the asphalt is rolled into having a size of 400mm × 300mm × 50mm track plate using laboratory wheel milling process,
And according to the test requirements document of " highway engineering pitch and Asphalt Mixture Experiment regulation " (JTG E20-2011), by the track plate
It is cut into bending girder test specimen, it is spare.
Wherein, wheel milling process in laboratory can make the asphalt of uniform mixing that can preferably simulate site operation at the time of molding
Condition, to keep the compacting and orientation of coarse aggregate and scene in asphalt almost the same, and vibration can increase compacting
Density, so this test use famous testing equipment manufacturer Cooper ResearchTechnology Co., Ltd, Britain
Provided vibrating wheels grind molding machine, are conveniently used for the parameters such as adjustment mode of vibration, compacting height, compaction velocity, specific to join
Number is shown in Table 1.
1 vibrating wheels of table grind method of forming test specimen control condition
It is demoulded after vibrating wheels are ground the cooling of track plate one day after molding, according to " highway engineering pitch and asphalt
Testing regulations " (JTG E20-2011) test requirements document, the four-point bending girder test specimen of standard is cut to, having a size of length
380mm × wide 63.5mm × high 50mm.(standard requirements sample dimensions range are as follows: 380 ± 5mm of length, 63.5 ± 5mm of width are high
Spend 50 ± 5mm).
Step 2: test uses multifunctional material pilot system (MTS-Landmark), by bending girder test specimen in constant temperature
Constant temperature for 24 hours, is then placed on the four-point bending test support of multifunctional material pilot system (MTS-Landmark) under case,
And adjusting makes the pressure head of four-point bending test start to test with test specimen initial contact, and tests process and complete in insulating box.
Step 3: working out operation program by built-in MPT and setting is further applied load and acquisition parameter, each loading cycle
Power is measured automatically by data collection system, displacement deformation is measured by displacement sensor, and it is different at 16 kinds will to be bent girder test specimen
Loading speed and 0 DEG C, carry out bending strength test under -20 DEG C of different temperatures, and each temperature and loading speed are equal by -10 DEG C
Five effective parallel tests have been carried out, the intensity value up to different loading speeds is averaged.
Step 4: according to the intensity value for the different loading speeds that step (3) obtains, having carried out four-point bending fatigue test,
And by the ratio between the stress level of loading speed a certain in fatigue test intensity value corresponding with loading speed identical in strength test
It is defined as speed related stress ratio.
Step 5: the speed related stress ratio obtained based on step 4 establishes asphalt under the conditions of low temperature and low frequency
Fatigue equation, and find to ask asphalt Strength Failure and fatigue failure than thought using speed related stress of the invention
Topic obtains unification.
It should be noted that the fatigue life of asphalt is affected by two kinds of load controlling mode, according to load item
Whether part changes, and load is divided into simple loads and compound load.The characteristics of simple loads is loading condition guarantor during test
Hold constant, and compound load is in contrast.According to test demand, this test uses easy simple loads loading mode, from
The characteristics of test is divided into Stress Control and strain controlling in nature, they have oneself.
The limit value of load and stress remain unchanged when Stress Control is load every time, and the intensity of asphalt is made with load
Reduced with the increase of number, although in this case stress amplitude stablize it is constant, generate strain can continue increase, most
The whole thorough failure test of girder test specimen terminates, and the cyclic load number that whole process is passed through is fatigue life.
Controlled strain is constant when strain controlling loads every time, and the intensity of asphalt is likewise as number of loading
Increase and reduce, constant in order to keep straining every time, the load applied constantly reduces, and stress becomes smaller, strain controlling fatigue
The termination condition of test is that the corresponding stress amplitude that is further applied load is reduced to the half of primary stress amplitude, and test specimen is passed through at this time
Cyclic load number be fatigue life.
Theoretically two kinds of control models are analyzed: first, the fatigue test of Stress Control is being tied under the same terms
Shorter the time required to when beam, reproducibility is preferable；U.S.'s Asphalt Mixture Design method shows, under the same conditions fatigue life
In comparison, 2.4 times of Stress Control mode when strain controlling mode.Second, since there are microfissures in asphalt, use
When proof stress mode, the load really applied can be made slightly to increase, simultaneously as the inhomogeneities of asphalt itself, no
Evitable there are different degrees of planes of weakness inside test specimen, and the destruction of girder test specimen is more rapid, for off-test
Judgment basis is more illustrated, and more indefinite using the standard of fatigue rupture when strain controlling, is reduced to initial strength using stiffness
The condition terminated when the half of degree as test, random disadvantage are more prominent.Third, Stress Control strong operability are discrete
Degree is relatively small, and criterion of failure is clear, so tested number is smaller.
Comprehensively considering, the Stress Control mode under simple loading mode and China's asphalt pavement structure design are more coincide,
Suitable for asphalt fatigue endurance Journal of Sex Research.Therefore, the present invention carries out the tired of asphalt using Stress Control mode
Labor performance study.
Preferably, the laboratory wheel milling process uses the vibrating wheels of Cooper Research Technology Co., Ltd
Molding machine is ground, the parameters such as adjustment mode of vibration, compacting height, compaction velocity are conveniently used for.
Preferably, the size range of the four-point bending girder test specimen are as follows: 380 ± 5mm of length, 63.5 ± 5mm of width are high
50 ± 5mm is spent, which can be directly used for bending strength and fatigue test.
Preferably, in the step 3, the power of each loading cycle measures automatically by data collection system, displacement deformation by
Displacement sensor measures.
Preferably, in the fatigue test of the step 4, use control model for Stress Control mode, Loaded contact analysis is half
Sine wave；And test frequency is 0.001Hz, 0.01Hz, 0.1Hz, 1Hz, test temperature is 0 DEG C, -10 DEG C, -20 DEG C.
It should be noted that since the temperature fatigue of asphalt is fatigue caused by the circulation change of temperature, Yin Wen
The frequency of the circulation change of degree is slowly, and directly test temperature fatigue is very difficult, therefore what this method was chosen
Loading frequency is low loading frequency: 1Hz, 0.1Hz, 0.01Hz, 0.001Hz, the selection of the low loading frequency are to simulate
The period of the temperature cycles of asphalt temperature fatigue.
Preferably, the reduction formula of loading frequency and loading speed are as follows:
V is the loading speed of fatigue test, and σ is the stress level of fatigue test, and T is the period of fatigue test, and f is fatigue
The loading frequency of test
Preferably, in the fatigue test of the step 4, by the stress level of loading speed a certain in fatigue test and by force
The ratio between corresponding intensity value of identical loading speed is defined as speed related stress ratio in degree test.
Preferably, the loading speed in the strength test be 0.003MPa/s, 0.006MPa/s, 0.009MPa/s,
0.03MPa/s, 0.06MPa/s, 0.09MPa/s, 0.3MPa/s, 0.6MPa/s, 0.9MPa/s, 3MPa/s, 6MPa/s, 9MPa/
S, 13MPa/s, 16MPa/s, 19MPa/s, 23MPa/s.
Preferably, in the strength test, by strength test under loading speeds different under asphalt different temperatures
Attached drawing 1 is shown in test result fitting, matched curve, the fit equation of different loading speed intensity results under the condition of different temperatures
It is respectively as follows:
Sv=22.806 ν0.320, R2=0.991 (under the conditions of 0 DEG C)
Sv=23.572 ν0.313, R2=0.987 (under the conditions of -10 DEG C)
Sv=24.312 ν0.305, R2=0.990 (under the conditions of -20 DEG C)
SvFor asphalt intensity corresponding with loading speed, v is the loading speed of fatigue test, R2It is equation
Related coefficient.
In addition, since asphalt is a kind of viscoelastic material, intensity by loading speed influenced be it is significant,
But in existing " highway engineering pitch and test mixture regulation " (JTGE20-2011) fatigue test Strength Testing Methods
In loading speed be fixed and invariable, therefore in this method consider loading rate effect intensity value can more react asphalt
Material resistance, to provide fundamental basis for the Accurate Prediction of asphalt temperature fatigue behaviour.
Through the above technical solutions, technical effect of the invention: the present invention provides a kind of asphalt temperature fatigues
The evaluation method of performance has not been only reached by analyzing asphalt temperature fatigue results under cryogenic conditions to drip
The purpose of green mixture temperature fatigue behaviour evaluation, and realize asphalt temperature fatigue behaviour under the conditions of low temperature and low frequency
Normalization, unify the Strength Failure of asphalt and Fatigue Failures, thus mixed for Accurate Prediction pitch
The temperature fatigue performance for closing material provides theoretical basis.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is bending strength under condition of different temperatures with the changing rule of loading speed；
Fig. 2 is the temperature fatigue performance matched curve of the asphalt based on speed related stress ratio under the conditions of 0 DEG C；
Fig. 3 is that the temperature fatigue performance of the asphalt based on speed related stress ratio under the conditions of -10 DEG C is fitted song
Line；
Fig. 4 is that the temperature fatigue performance of the asphalt based on speed related stress ratio under the conditions of -20 DEG C is fitted song
Line.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The embodiment of the invention discloses a kind of evaluation methods of asphalt temperature fatigue behaviour, by low temperature and low frequency
Under the conditions of asphalt fatigue results analyzed, do not only reached to asphalt fatigue properties under the conditions of low temperature and low frequency
The purpose evaluated, and find using speed related stress of the invention than thought make asphalt Strength Failure and
Fatigue Failures are unified, and realize the normalization of fatigue performance of asphalt mixture under the conditions of low temperature and low frequency, are simultaneously
The temperature fatigue performance of Accurate Prediction asphalt provides theoretical basis.
Embodiment
1) four-point bending fatigue test method
Using mineral aggregate by successively screening, load weighted mineral aggregate is put and preheats 4 hours in an oven so that mineral aggregate is abundant
Drying, stirs to make to gather materials for 90 seconds and stirs evenly after agitated kettle adds mineral aggregate or pitch every time.Using vibratile compacter, facilitate use
In parameters such as adjustment mode of vibration, compacting height, compaction velocities.The size of roller-compaction test plate (panel) be 400mm × 300mm ×
50mm；Then 380mm × 63.5mm × 50mm beam specimen is cut to for bending strength and fatigue test.
Test uses multifunctional material pilot system (MTS-Landmark), by four-point bending test specimen respectively in insulating box 0
DEG C, -10 DEG C, constant temperature 24 hours under conditions of -20 DEG C, pass through built-in MPT establishment operation program and be arranged and be further applied load and acquire
Parameter, the power of each loading cycle is measured automatically by data collection system, displacement deformation is measured by displacement sensor, is then started
It tests and test process is completed in insulating box, test data can calculate each period by the processing of MATLAB programming software
Stress, strain and intensity value.
In strength test, the test result of strength test under loading speeds different under asphalt different temperatures is intended
It closes, attached drawing 1 is shown in matched curve, and the fit equation of different loading speed intensity results is respectively as follows: under the condition of different temperatures
Sv=22.806 ν0.320, R2=0.991 (under the conditions of 0 DEG C)
Sv=23.572 ν0.313, R2=0.987 (under the conditions of -10 DEG C)
Sv=24.312 ν0.305, R2=0.990 (under the conditions of -20 DEG C)
SvFor asphalt intensity corresponding with loading speed, v is the loading speed of fatigue test, R2It is equation
Related coefficient.
According to test result, it is based on classic fatigue test method, it is different behind the testing site for rejecting the substantial deviation curve of fatigue
The parameter that asphalt mixture fatigue testing result is fitted according to traditional S-N fatigue equation under the conditions of temperature and different loading frequencies is such as
Shown in table 2- table 4.
The fitting result of damage parameters of the table 2 based on speed related stress ratio is under the conditions of 0 DEG C
The fitting result of damage parameters of the table 3 based on speed related stress ratio is under the conditions of -10 DEG C
The fitting result of damage parameters of the table 4 based on speed related stress ratio is under the conditions of -20 DEG C
The n value of fatigue equation is normalized under 5 condition of different temperatures of table
From 2~table of table 4 as can be seen that at the same temperature, the n value of fatigue equation is not much different, n value indicates that double-log is sat
The slope of the curve of fatigue in mark.Speed related stress through the invention can be by the fatigue test under different frequency than thought
As a result it is characterized with a curve, the normalization of asphalt temperature fatigue behaviour under the conditions of low temperature and low frequency is realized, wherein 0
DEG C, -10 DEG C, the fitting result under -20 DEG C of condition of different temperatures is as shown in Figure 2 to 4.
From 2~attached drawing of attached drawing 4 as can be seen that based on speed related stress under condition of different temperatures than the curve of fatigue of thought
By fatigue rupture point (1,1), and from formula (1) and formula (3) it can be seen that k is under 0 DEG C, -10 DEG C and -20 DEG C of different temperatures
It is equal to 1.And Nf=1 indicates that asphalt fatigue life is 1 fatigue failure, that is to say, that when speed in fatigue test
When related stress ratio is 1, the fatigue life of asphalt is 1, and therefore, the pitch based on speed related stress than thought mixes
Material fatigue behaviour prediction model has unified Strength Failure and Fatigue Failures.
It should be noted that from 2~table of table 4 as can be seen that by the different loading frequencies based on speed related stress ratio
The k value of fatigue equation very close 1.Some k values are more than or less than 1, this may be as caused by test error.
In addition, as can be seen from Table 5, under condition of different temperatures, with the reduction of temperature, being based on speed related stress ratio
The n value of normalization fatigue equation be increased slightly and linear growth trend be presented.N value in fatigue equation indicates the curve of fatigue
Slope, it indicates fatigue life with the sensibility of temperature, this shows that temperature is lower, and the sensibility of asphalt fatigue life is got over
Greatly.
Based on speed related stress ratio, normalization fatigue of the asphalt under 0 DEG C, -10 DEG C and -20 DEG C different temperatures
Equation is respectively as follows:
Nf=(1/tv)2.596, R2=0.994 formula (1)
Nf=(1/tv)3.114, R2=0.997 formula (2)
Nf=(1/tv)3.241, R2=0.995 formula (3)
Wherein, NfIt is fatigue life；K, n test parameters related with material properties；tvIt is speed related stress ratio；SvIt is
Intensity relevant to speed.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (5)
1. a kind of evaluation method of asphalt temperature fatigue behaviour, which is characterized in that the evaluation method specifically include as
Lower step:
Step 1: the mineral aggregate through successively sieving is dried, and asphalt mixing is added and uniformly obtains asphalt, using laboratory
The asphalt is rolled into having a size of 400mm × 300mm × 50mm track plate by wheel milling process, and according to " highway engineering
Pitch and Asphalt Mixture Experiment regulation " (JTGE20-2011) test requirements document, by the track plate be cut into bending girder examination
Part, it is spare；
Step 2: being placed on temperature control box heat preservation for 24 hours for the ready girder test specimen of step 1, is then placed on multifunctional material test system
It unites on the four-point bending test support of (MTS-Landmark), and adjusts the pressure head and test specimen initial contact for making four-point bending test
Start to test, and tests process and completed in insulating box；
Step 3: working out operation program by built-in MPT and setting is further applied load and acquisition parameter, will be bent girder test specimen 16
Kind different loading speeds and 0 DEG C, carry out bending strength test under -20 DEG C of different temperatures by -10 DEG C, and each temperature and plus
It carries rate and has carried out five effective parallel tests, be averaged the intensity value up to different loading speeds；
Step 4: obtaining the intensity value of different loading speeds according to step 3, has carried out four-point bending fatigue test, and will be tired
The ratio between the stress level of a certain loading speed intensity value corresponding with loading speed identical in strength test is defined as speed in test
Spend related stress ratio；
Step 5: the speed related stress ratio obtained based on step 4 establishes the fatigue of asphalt under the conditions of low temperature and low frequency
Equation, and find to make asphalt intensity and Fatigue Failures be united than thought using speed related stress of the invention
One.
2. a kind of evaluation method of asphalt temperature fatigue behaviour according to claim 1, which is characterized in that described
Laboratory takes turns milling process and grinds molding machine using the vibrating wheels of Cooper Research Technology Co., Ltd, is conveniently used for
Adjust the parameters such as mode of vibration, compacting height, compaction velocity.
3. a kind of evaluation method of asphalt temperature fatigue behaviour according to claim 2, which is characterized in that described
The size range of four-point bending girder test specimen are as follows: 380 ± 5mm of length, 63.5 ± 5mm of width, 50 ± 5mm of height, this 4 points curved
Qu little Liang test specimen can be directly used for bending strength and fatigue test.
4. a kind of evaluation method of asphalt temperature fatigue behaviour according to claim 1, which is characterized in that described
In step 3, the power of each loading cycle is measured automatically by data collection system, displacement deformation is measured by displacement sensor.
5. a kind of evaluation method of asphalt temperature fatigue behaviour according to claim 1, which is characterized in that described
In the fatigue test of step 4, use control model for Stress Control mode, Loaded contact analysis is half-sine wave；And test frequency is
0.001Hz, 0.01Hz, 0.1Hz, 1Hz, test temperature are 0 DEG C, -10 DEG C, -20 DEG C.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110196197A (en) * | 2019-05-09 | 2019-09-03 | 长沙理工大学 | A kind of temperature dependency characterizing method of asphalt fatigue properties |
| CN111624119A (en) * | 2020-06-04 | 2020-09-04 | 浙江省交通运输科学研究院 | Method for evaluating high-modulus asphalt concrete fatigue resistance performance under simulation of high-temperature rainy conditions |
| CN112903982A (en) * | 2021-03-18 | 2021-06-04 | 中交一公局第五工程有限公司 | Nondestructive monitoring method and system for mechanical property of asphalt pavement |
| CN114062133A (en) * | 2021-11-12 | 2022-02-18 | 横店集团东磁股份有限公司 | Method and device for testing mechanical strength of solar cell |
| CN114252358A (en) * | 2021-12-22 | 2022-03-29 | 江苏镇淮建设集团有限公司 | Recycled asphalt mixture semi-circle bending fatigue testing method under double-stress repeated loading mode |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101592652A (en) * | 2008-07-04 | 2009-12-02 | 重庆交通大学 | Prediction method of fatigue lifetime of asphalt pavement in sticky areas |
| CN101788431A (en) * | 2010-02-10 | 2010-07-28 | 长沙理工大学 | Device and method for testing shear performance of asphalt mixture |
| CN102252916A (en) * | 2011-04-25 | 2011-11-23 | 山东省交通科学研究所 | Method for testing fatigue damage of inorganic binding material stabilizing material |
| CN102519812A (en) * | 2011-12-16 | 2012-06-27 | 长沙理工大学 | Method for evaluating high-temperature stability of asphalt pavement structure or asphalt mixture |
| CN108956286A (en) * | 2018-05-03 | 2018-12-07 | 长沙理工大学 | The method for normalizing of asphalt fatigue properties under a kind of different stress |
-
2019
- 2019-01-26 CN CN201910076537.9A patent/CN109596440A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101592652A (en) * | 2008-07-04 | 2009-12-02 | 重庆交通大学 | Prediction method of fatigue lifetime of asphalt pavement in sticky areas |
| CN101788431A (en) * | 2010-02-10 | 2010-07-28 | 长沙理工大学 | Device and method for testing shear performance of asphalt mixture |
| CN102252916A (en) * | 2011-04-25 | 2011-11-23 | 山东省交通科学研究所 | Method for testing fatigue damage of inorganic binding material stabilizing material |
| CN102519812A (en) * | 2011-12-16 | 2012-06-27 | 长沙理工大学 | Method for evaluating high-temperature stability of asphalt pavement structure or asphalt mixture |
| CN108956286A (en) * | 2018-05-03 | 2018-12-07 | 长沙理工大学 | The method for normalizing of asphalt fatigue properties under a kind of different stress |
Non-Patent Citations (3)
| Title |
|---|
| 吕松涛: "用真实应力比表征的老化沥青混合料疲劳性能", 《公路交通科技》 * |
| 朱凯旋: "考虑非线性损伤影响的沥青混合料疲劳全寿命研究", 《中国优秀硕士学位论文全文数据库》 * |
| 王晓阳: "考虑拉压模量差异的沥青混合料疲劳损伤特性研究", 《中国优秀硕士学位论文全文数据库》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110196197A (en) * | 2019-05-09 | 2019-09-03 | 长沙理工大学 | A kind of temperature dependency characterizing method of asphalt fatigue properties |
| CN111624119A (en) * | 2020-06-04 | 2020-09-04 | 浙江省交通运输科学研究院 | Method for evaluating high-modulus asphalt concrete fatigue resistance performance under simulation of high-temperature rainy conditions |
| CN112903982A (en) * | 2021-03-18 | 2021-06-04 | 中交一公局第五工程有限公司 | Nondestructive monitoring method and system for mechanical property of asphalt pavement |
| CN112903982B (en) * | 2021-03-18 | 2023-05-30 | 中交一公局第五工程有限公司 | Nondestructive monitoring method and system for mechanical properties of asphalt pavement |
| CN114062133A (en) * | 2021-11-12 | 2022-02-18 | 横店集团东磁股份有限公司 | Method and device for testing mechanical strength of solar cell |
| CN114252358A (en) * | 2021-12-22 | 2022-03-29 | 江苏镇淮建设集团有限公司 | Recycled asphalt mixture semi-circle bending fatigue testing method under double-stress repeated loading mode |
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