CN110186810A - The non-linear rheology characteristic test method of pitch of stress substantially oscillatory shear load - Google Patents
The non-linear rheology characteristic test method of pitch of stress substantially oscillatory shear load Download PDFInfo
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- CN110186810A CN110186810A CN201910585904.8A CN201910585904A CN110186810A CN 110186810 A CN110186810 A CN 110186810A CN 201910585904 A CN201910585904 A CN 201910585904A CN 110186810 A CN110186810 A CN 110186810A
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Abstract
The present invention provides the non-linear rheology characteristic test methods of pitch of stress substantially oscillatory shear load, belong to pitch rheological behavior test method field.The present invention carries out stress scans test to pitch using rheometer, determines the non-linear rheology area of pitch；Secondly in the stress level of inelastic region access time scan test；Then time sweep test is carried out, stable strain-responsive wave period is chosen and carries out analysis of experiments；Then strain response wave shape is pre-processed, the absolute value of wave crest is made to be equal to the absolute value of trough；The changing rule of the parameter of the reflection non-linear rheological behaviour of pitch is finally obtained using pretreated Wave data.The present invention helps to analyze the non-linear rheological behavior of pitch, opens up new way to the accurate characterization of pitch complexity viscoelasticity mechanical behavior under high-temperature, big stress condition.
Description
Technical field
The present invention relates to the non-linear rheology characteristic test methods of pitch of stress substantially oscillatory shear load, belong to pitch stream
Become characteristic test method field.
Background technique
Pitch is typical viscous-elastic material, and rheological behavior plays the role of vital in pavement performance evaluation.
In practical application, the pitch unavoidably effect by substantially oscillatory shear load shows non-linear rheological behavior, but at present
Researcher focuses primarily upon the research of linear rheological behavior, but rarely has research for non-linear rheological behavior, lacks complete set
The research system for the non-linear rheological behavior of pitch.Therefore it is based on stress substantially oscillatory shear load (LAOS stress)
Time sweep test proposes pitch non-linear rheology characteristic test method of the stress substantially under oscillatory shear load action.It should
Method helps to analyze the non-linear rheological behavior of pitch, to pitch complexity viscoelasticity mechanics row under high-temperature, big stress condition
For accurate characterization open up new way, be of great significance to the comprehensive assessment of asphalt performance.
Summary of the invention
The purpose of the present invention is to solve the above-mentioned problems of the prior art, and then provide stress substantially oscillatory shear
The non-linear rheology characteristic test method of the pitch of load.
The purpose of the present invention is what is be achieved through the following technical solutions:
The non-linear rheology characteristic test method of pitch of stress substantially oscillatory shear load, the stress substantially oscillatory shear
The non-linear rheology characteristic test method specific steps of the pitch of load are as follows:
Step 1: stress scans test is carried out to pitch using the dynamic shear rheometer of Stress Control mode, is moved
State modulus of shearing is that ordinate draws modulus-stress relation curve using stress as abscissa, dynamic shear modulus, determines non-thread
The range of stress in property rheology area；
Step 2: answering within the scope of 5-10 non-linear rheology areas is chosen on modulus-stress relation curve of step 1
Power is as the stress level under stress substantially oscillatory shear load in time sweep test；
Step 3: using the stress level selected in step 2 to pitch carry out stress substantially under oscillatory shear load when
Between scan test, using the time be abscissa, strain for ordinate, draw out strain-time waveform curve；
Step 4: strain-responsive waveform is chosen on strain-time waveform curve of step 3 and reaches 3-8 after stablizing
The data in period generally select preceding 5 stable periods, when stress level is excessive, when lazy weight stable period, can take the circumstances into consideration to reduce
Periodicity；
Step 5: strain-responsive data on strain-time waveform curve of step 4 are pre-processed, waveform is carried out
Length travel makes the absolute value of wave crest be equal to the absolute value of trough；
Step 6: handling the pretreated Wave data of step 5 with Fourier's rheology or Stress decomposition method,
The changing rule of the parameter of the reflection non-linear rheological behaviour of pitch is obtained, the non-linear rheological behavior of pitch is analyzed.
The non-linear rheology characteristic test method of pitch of stress of the present invention substantially oscillatory shear load, tests the stress of use
The dynamic shear rheometer of control model is the DHR series instrument of U.S. TA company production.
The non-linear rheology characteristic test method of pitch of stress of the present invention substantially oscillatory shear load, in the step 1,
Pitch is 70# matrix pitch and the modified pitch for adding 3%, 5%SBS, and the test temperature of stress scans test is 30 DEG C, stress
The loading frequency of scan test is 1rad/s, 5rad/s, 10rad/s；According to the SHRP evaluation method of asphalt material, work as dynamic analog
Amount be less than its initial value 90% when for pitch non-linear rheology area.
The non-linear rheology characteristic test method of pitch of stress of the present invention substantially oscillatory shear load, in the step 3,
Stress scans test in pitch type, test temperature and loading frequency and step 1, corresponding stress level is step
Selected by two.
The non-linear rheology characteristic test method of pitch of stress of the present invention substantially oscillatory shear load, proposes stress substantially
The test method of the non-linear rheological behavior of pitch under oscillatory shear load action, the non-linear rheology for helping to analyze pitch are special
Property, new way is opened up to the accurate characterization of pitch complexity viscoelasticity mechanical behavior under high-temperature, big stress condition, to asphalt performance
Comprehensive assessment be of great significance.
Detailed description of the invention
Fig. 1 is stress scans result figure of the invention, is non-linear rheology area in dotted line frame in figure.
Fig. 2 is the strain-responsive waveform diagram that time sweep of the invention is tested, the waveform number in figure in dotted line frame to choose
According to.
Fig. 3 is the pretreatment figure of strain-responsive waveform of the present invention.
Fig. 4 is Fourier's harmonic wave-frequency curve chart of the invention.
Fig. 5 is I of the invention3/I1Stress level log-log graph.
Specific embodiment
Below in conjunction with attached drawing, the present invention is described in further detail: the present embodiment is being with technical solution of the present invention
Under the premise of implemented, give detailed embodiment, but protection scope of the present invention is not limited to following embodiments.
Embodiment one: as shown in Figs. 1-5, the pitch of the substantially oscillatory shear load of stress involved in the present embodiment is non-linear
Rheological behavior test method, specific steps are as follows:
Step 1: stress scans test is carried out to pitch using the dynamic shear rheometer of Stress Control mode, is moved
State modulus of shearing is that ordinate draws modulus-stress relation curve using stress as abscissa, dynamic shear modulus, determines non-thread
The range of stress in property rheology area；
Step 2: answering within the scope of 5-10 non-linear rheology areas is chosen on modulus-stress relation curve of step 1
Power is as the stress level under stress substantially oscillatory shear load in time sweep test；
Step 3: using the stress level selected in step 2 to pitch carry out stress substantially under oscillatory shear load when
Between scan test, using the time be abscissa, strain for ordinate, draw out strain-time waveform curve；Step 4: in step
The data that the 3-8 period that strain-responsive waveform reaches after stablizing is chosen on three strain-time waveform curve, before generally selecting
5 stable periods when lazy weight stable period, can take the circumstances into consideration to reduce periodicity when stress level is excessive；
Step 5: strain-responsive data on strain-time waveform curve of step 4 are pre-processed, waveform is carried out
Length travel makes the absolute value of wave crest be equal to the absolute value of trough；
Step 6: handling the pretreated Wave data of step 5 with Fourier's rheology or strain partitioning method,
The changing rule of the parameter of the reflection non-linear rheological behaviour of pitch is obtained, the non-linear rheological behavior of pitch is analyzed.
Test is all using the DHR series rheometer of U.S. TA company production.
In step 1, pitch is 70# matrix pitch and the modified pitch for adding 3%, 5%SBS, the examination of stress scans test
Testing temperature is 30 DEG C, and the loading frequency of stress scans test is 1rad/s, 5rad/s, 10rad/s；According to the SHRP of asphalt material
Evaluation method is the non-linear rheology area of pitch when dynamic modulus is less than the 90% of its initial value.
In step 3, the stress scans test in pitch type, test temperature and loading frequency and step 1, accordingly
Stress level be selected in step 2.
Embodiment two: as shown in Figs. 1-5, the pitch of the substantially oscillatory shear load of stress involved in the present embodiment is non-linear
Rheological behavior test method, specific operation process:
Step 1: at 30 DEG C, carrying out frequency to the modified pitch for adding 5%SBS using dynamic shear rheometer is
The stress scans of 10rad/s are tested, and test uses 8mm plate.It is that ordinate is drawn using stress as abscissa, dynamic shear modulus
Modulus-stress relation curve determines the range of stress (result is as shown in Figure 1) in non-linear rheology area.
Step 2: 10 stress are selected (in Fig. 1 dotted line frame) within the scope of non-linear rheology area, are substantially vibrated as stress
Stress level in shear load (LAOS stress) time sweep.
Step 3: substantially vibrate to pitch the time sweep examination under load in step 2 using the stress level selected
It tests, using the time as abscissa, strains as ordinate, draw out strain-responsive wavy curve (result is as shown in Figure 2).
Step 4: the 3-8 period progress analysis of experiments that strain-responsive reaches stable state is chosen, generally selects first 5
Stable period (in Fig. 2 dotted line frame) when lazy weight stable period, can have chosen 3 periods when stress level is excessive.
Step 5: pre-processing data, and the strain-responsive waveform in step 3 is carried out length travel, makes wave crest
Absolute value is equal to the absolute value (as shown in Figure 3) of trough.
Step 6: the pretreated Wave data of step 5 is analyzed with Fourier's rheology, is become using Fourier
Strain-responsive data under time domain of changing commanders are transformed under frequency domain, obtain Fourier's harmonic wave-frequency curve chart (as shown in Figure 4), so
Afterwards using stress level as abscissa, 3 order harmonics intensity ratios are ordinate, draw out I3/I1Stress level log-log graph is (such as
Shown in Fig. 5), as seen from the figure for same pitch under a certain frequency, with the enhancing I of stress level3/I1It is gradually bigger, explanation
Nonlinear degree also gradually increases.
As a kind of test method of the non-linear rheological behavior of pitch, facilitate the non-linear rheological behavior for analyzing pitch,
New way is opened up to the accurate characterization of pitch complexity viscoelasticity mechanical behavior under high-temperature, big stress condition, to asphalt performance
Comprehensive assessment is of great significance.
The foregoing is only a preferred embodiment of the present invention, these specific embodiments are all based on the present invention
Different implementations under general idea, and scope of protection of the present invention is not limited thereto, it is any to be familiar with the art
Technical staff in the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of, should all cover of the invention
Within protection scope.Therefore, the scope of protection of the invention shall be subject to the scope of protection specified in the patent claim.
Claims (4)
1. the non-linear rheology characteristic test method of pitch of stress substantially oscillatory shear load, which is characterized in that the stress is big
The non-linear rheology characteristic test method specific steps of the pitch of width oscillatory shear load are as follows:
Step 1: stress scans test is carried out to pitch using the dynamic shear rheometer of Stress Control mode, dynamic is obtained and cuts
Shear modulu is that ordinate draws modulus-stress relation curve using stress as abscissa, dynamic shear modulus, determines non-linear flow
Become the range of stress in area；
Step 2: it is chosen on modulus-stress relation curve of step 1 within the scope of 5-10 non-linear rheology areas and answers masterpiece
For the stress level under stress substantially oscillatory shear load in time sweep test；
Step 3: the time under pitch progress stress substantially oscillatory shear load is swept using the stress level selected in step 2
Test is retouched, is abscissa, strain for ordinate using the time, draws out strain-time waveform curve；
Step 4: strain-responsive waveform is chosen on strain-time waveform curve of step 3 and reaches the 3-8 period after stablizing
Data, generally select preceding 5 stable periods, when stress level is excessive, when lazy weight stable period, can take the circumstances into consideration to reduce the period
Number；
Step 5: pre-processing strain-responsive data on strain-time waveform curve of step 4, waveform is carried out longitudinal
Displacement makes the absolute value of wave crest be equal to the absolute value of trough；
Step 6: the pretreated Wave data of step 5 is handled with Fourier's rheology or strain partitioning method, is obtained
The changing rule for reflecting the parameter of the non-linear rheological behaviour of pitch, analyzes the non-linear rheological behavior of pitch.
2. the non-linear rheology characteristic test method of pitch of stress according to claim 1 substantially oscillatory shear load,
It is characterized in that, tests the DHR series instrument that the dynamic shear rheometer of the Stress Control mode used produces for TA company, the U.S..
3. the non-linear rheology characteristic test method of pitch of stress according to claim 1 substantially oscillatory shear load,
It is characterized in that, in the step 1, pitch is 70# matrix pitch and the modified pitch for adding 3%, 5%SBS, stress scans examination
The test temperature tested is 30 DEG C, and the loading frequency of stress scans test is 1rad/s, 5rad/s, 10rad/s；According to asphalt material
SHRP evaluation method, when dynamic modulus be less than its initial value 90% when be pitch non-linear rheology area.
4. the non-linear rheology characteristic test method of pitch of stress according to claim 1 substantially oscillatory shear load,
It is characterized in that, the stress scans test one in the step 3, in pitch type, test temperature and loading frequency and step 1
Sample, corresponding stress level are selected in step 2.
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| CN110907311A (en) * | 2019-12-04 | 2020-03-24 | 哈尔滨工业大学 | Improved method for testing dynamic rheological property of emulsified asphalt |
| CN112362511A (en) * | 2020-11-11 | 2021-02-12 | 哈尔滨工业大学 | Method for determining fatigue evaluation index of asphalt material based on Fourier rheology |
| CN113686707A (en) * | 2021-09-28 | 2021-11-23 | 哈尔滨工业大学 | Asphalt fatigue performance testing and evaluating method for separating thixotropy and nonlinear influence |
| CN113791003A (en) * | 2021-10-21 | 2021-12-14 | 广州大学 | Rheological measurement method for viscoelasticity aging property of graphene oxide suspension |
| CN114544430A (en) * | 2022-02-25 | 2022-05-27 | 广州大学 | Rheological experiment characterization method for viscoelastic property of polydisperse polyacrylamide aqueous solution |
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| CN110907311A (en) * | 2019-12-04 | 2020-03-24 | 哈尔滨工业大学 | Improved method for testing dynamic rheological property of emulsified asphalt |
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| CN113686707B (en) * | 2021-09-28 | 2022-04-26 | 哈尔滨工业大学 | Asphalt fatigue performance testing and evaluating method for separating thixotropy and nonlinear influence |
| CN113791003A (en) * | 2021-10-21 | 2021-12-14 | 广州大学 | Rheological measurement method for viscoelasticity aging property of graphene oxide suspension |
| CN113791003B (en) * | 2021-10-21 | 2023-09-08 | 广州大学 | Rheological measurement method for viscoelastic aging property of graphene oxide suspension |
| CN114544430A (en) * | 2022-02-25 | 2022-05-27 | 广州大学 | Rheological experiment characterization method for viscoelastic property of polydisperse polyacrylamide aqueous solution |
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