CN108344663B - Asphalt multi-stage creep damage testing method - Google Patents
Asphalt multi-stage creep damage testing method Download PDFInfo
- Publication number
- CN108344663B CN108344663B CN201810047304.1A CN201810047304A CN108344663B CN 108344663 B CN108344663 B CN 108344663B CN 201810047304 A CN201810047304 A CN 201810047304A CN 108344663 B CN108344663 B CN 108344663B
- Authority
- CN
- China
- Prior art keywords
- test
- asphalt
- creep
- frequency scanning
- frequency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
-
- 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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The method for testing the multi-stage creep damage of the asphalt comprises the following steps of firstly, determining the control load of a frequency scanning test in a multi-stage creep test based on a stress scanning test; then selecting a frequency scanning test node according to a creep compliance change rule in a conventional creep test, wherein the first test node is a test starting point, namely a time zero point; continuing the creep test after the frequency scanning test is carried out on the first test node until the creep test reaches the second test node, and repeating the steps until the test is finished; establishing a viscoelastic parameter main curve based on the frequency scanning test result of each test node; fitting a main curve of each test node by adopting a visco-elastic constitutive model; and finally analyzing the change rule of the creep damage of the asphalt based on the visco-elastic constitutive model parameters. The method is helpful for understanding the damage characteristic and the creep damage evolution mechanism of the asphalt, and has important significance for establishing the asphalt performance evaluation index.
Description
Technical Field
The invention relates to a multi-stage creep damage testing method for asphalt, and belongs to the technical field of asphalt creep damage testing methods.
Background
Creep property is one of the important viscoelastic properties of asphalt, and can reflect the deformability of asphalt. The conventional creep test of the asphalt is to apply fixed stress to the asphalt and analyze the change rule of parameters such as strain, creep compliance and the like along with the load action time. The method cannot reflect the internal damage formation and evolution rule of the asphalt in the loading action process. Therefore, a multi-stage creep test combined with a frequency scanning test is designed, changes of viscoelastic parameters such as dynamic modulus and phase angle of the asphalt in a creep process can be measured, the change rule of a main curve cluster of viscoelastic parameters in the asphalt in a creep damage process is analyzed, and the change rule of a microstructure in the asphalt is analyzed by combining a viscoelastic constitutive model on the basis. The method provides a theoretical basis for the extraction of the evaluation index of the creep damage of the asphalt and the prediction of the mechanical property, and also provides a certain reference for the analysis of the damage evolution of other viscoelastic materials.
Disclosure of Invention
The invention provides a method for testing multi-stage creep damage of asphalt, aiming at solving the problem that the conventional creep test is difficult to comprehensively reflect the change rule of an internal microstructure of the asphalt in the creep process at present.
The asphalt multistage creep damage testing method comprises the following specific steps:
the method comprises the following steps: and (3) carrying out a stress scanning test on the asphalt by using a dynamic shear rheometer, and then drawing a dynamic modulus-stress relation curve by using the stress as an abscissa and the dynamic modulus as an ordinate to determine the linear visco-elastic range of the asphalt. Selecting a plurality of loads in the linear visco-elastic range, and determining the plurality of loads and carrying out tests by considering the factors that the error of the equipment with too small loads is large, the test time is too long, and the sample is damaged and disturbed when the load is too large. Finally, determining the load with the highest coincidence degree with the conventional creep test as the control load of the frequency scanning test in the multi-stage creep test;
step two: and (3) carrying out a conventional creep test on the asphalt, and determining the change of the viscoelasticity parameter of the asphalt along with the load action time in the creep test. Setting a plurality of frequency scanning test nodes based on the principle that the influence of the stage change rule and the time interval of creep compliance on the multi-stage creep test is minimum, wherein the first test node is a test starting point, namely a time zero point;
step three: carrying out a frequency scanning test on the sample at the first test node by adopting the load determined in the step one so as to determine the change rule of viscoelastic parameters such as initial modulus, phase angle and the like of the asphalt sample along with the frequency;
step four: carrying out a conventional creep test on the sample, carrying out a frequency scanning test when the time reaches a second test point, setting parameters of the frequency scanning test are the same as those of the third step, and repeating the steps until the multi-stage creep test is finished;
step five: establishing a main curve cluster of the asphalt viscoelastic parameters based on a frequency scanning test result in a multi-stage creep test; and fitting the main curve cluster by adopting a visco-elastic constitutive model to obtain a change rule of the characteristic parameters of the asphalt visco-elastic property, and analyzing an evolution rule of the asphalt creep damage.
In the first step, aiming at the No. 90 matrix asphalt to be researched, the test temperature of a stress scanning test is 50 ℃, and the load application frequency is 5 Hz; the temperature of the frequency scanning test is 50 ℃, and the load is controlled to be 2000 Pa; the temperature of the creep test is 50 ℃, and the controlled load is 3500 Pa.
In the second step, 17 test nodes are tested in the frequency scanning test.
In the third step, the test frequencies of the frequency scanning test are 5Hz, 10Hz, 15Hz, 20Hz, 30Hz, 40Hz and 60 Hz.
The invention has the advantages of
As a new method for testing the creep damage evolution process of the asphalt, the intermittent setting of the frequency scanning test has very important significance, namely the changes of viscoelastic parameters such as dynamic modulus, phase angle and the like of the asphalt at different stages in the creep damage process of the asphalt can be measured; and then the change rule of the characteristic parameters of the asphalt viscoelasticity in the creep process can be obtained, and the analysis of the evolution rule of the creep damage of the asphalt is facilitated. The method has very important significance for the proposal of asphalt damage variables and the prediction of performance.
Drawings
FIG. 1 is a graph of the results of asphalt stress sweep tests.
FIG. 2 is a multi-stage creep test node set up graph.
FIG. 3 is a multi-stage creep test loading diagram.
FIG. 4 is a bi-logarithmic plot of creep compliance versus time for a conventional creep test and a multi-stage creep test.
FIG. 5 is a family of principal curves of asphalt dynamic modulus.
FIG. 6 is a curve showing the variation law of asphalt damage variables.
Detailed Description
The invention will be described in further detail below with reference to the accompanying drawings: the present embodiment is implemented on the premise of the technical solution of the invention, and a detailed implementation is given, but the scope of the invention is not limited to the following embodiments.
The asphalt multi-stage creep damage testing method related to the embodiment comprises the following steps:
the method comprises the following steps: under the test conditions of 50 ℃ and 5Hz, a 25mm parallel plate is adopted, a dynamic shear rheometer is utilized to carry out a stress scanning test on No. 90 matrix asphalt, then a dynamic modulus-stress relation curve is drawn by taking stress as an abscissa and taking dynamic modulus as an ordinate, the linear viscoelastic range of the asphalt is determined to be 0-10100 Pa according to the curve, a plurality of control loads are selected within the linear viscoelastic range of the asphalt, and finally 2000Pa with the highest overlap ratio with a creep compliance curve of a conventional creep test is selected as the control load of a frequency scanning test in a multi-stage creep test (as shown in figure 1);
step two: and (3) carrying out a conventional creep test on the sample, and determining the change of the viscoelastic parameters of the asphalt along with the acting time of the load in the creep test. Designing 17 frequency sweep test nodes (as shown in FIG. 2) based on the principle that the influence of the stage change rule and the time interval of the creep compliance on the multi-stage creep test is minimum;
step three: performing a frequency scanning test on the sample by adopting 2000Pa stress at a first test node (the scanning frequency is 5Hz, 10Hz, 15Hz, 20Hz, 30Hz, 40Hz and 60Hz) to obtain viscoelastic parameters such as initial modulus, phase angle and the like of the asphalt sample;
step four: and (4) carrying out a creep test on the sample, carrying out a frequency scanning test when the time reaches a second test node, setting parameters of the frequency scanning test are the same as those of the third step, and so on until the multi-stage creep test is finished. From the overall trend, the multi-stage creep test method has the same trend as the conventional creep test method, which indicates that the multi-stage creep test method is feasible (as shown in fig. 3 and 4).
Step five: establishing a main curve cluster of the asphalt viscoelastic parameters (as shown in figure 5) based on frequency scanning test results in the multi-stage creep test; and fitting the main curve cluster by adopting a visco-elastic constitutive model to obtain a change rule of the characteristic parameters of the asphalt visco-elastic, and analyzing an evolution rule of the creep damage of the asphalt (as shown in figure 6).
As a new method for testing the creep damage evolution process of the asphalt, the insertion of the frequency scanning test has very important significance. The method can measure the changes of viscoelastic parameters such as dynamic modulus, phase angle and the like of the asphalt at different stages in the creep damage process of the asphalt, and then obtains the change rule of the characteristic parameters of the asphalt viscoelastic in the creep damage evolution process by combining with the viscoelastic constitutive model, thereby being beneficial to analyzing the creep damage mechanism of the asphalt.
The above description is only a preferred embodiment of the present invention, and these embodiments are based on different implementations of the overall concept of the invention, and the scope of the invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the invention disclosed herein should be covered within the scope of the invention. Therefore, the protection scope of the invention should be subject to the protection scope of the claims.
Claims (4)
1. The asphalt multi-stage creep damage testing method is characterized in that,
the method comprises the following steps of firstly, performing a stress scanning test on asphalt by using a dynamic shear rheometer, then drawing a dynamic modulus-stress relation curve by taking stress as an abscissa and dynamic modulus as an ordinate, determining a linear viscoelastic range of the asphalt, selecting a plurality of loads in the linear viscoelastic range, and finally determining the load with the highest coincidence degree with a conventional creep test as a control load of a frequency scanning test in a multi-stage creep test;
step two: carrying out a conventional creep test on an asphalt sample, measuring the change of asphalt viscoelastic parameters along with the load action time in the creep test, and setting a plurality of frequency scanning test nodes based on the principle that the influence of the staged change rule of creep compliance and time intervals on the multi-stage creep test is minimum, wherein the first test node is a test starting point, namely a time zero point;
step three: carrying out a frequency scanning test on the sample at the first test node by adopting the load determined in the step one so as to determine the change rule of the initial modulus and the phase angle viscoelastic parameter of the sample along with the frequency;
step four: carrying out creep test on the sample, carrying out frequency scanning test when the time is carried out to a second test node, setting parameters of the frequency scanning test are the same as those of the third step, and repeating the steps until the multi-stage creep test is finished;
step five: establishing a main curve cluster of the asphalt viscoelastic parameters based on a frequency scanning test result in a multi-stage creep test; and fitting the main curve cluster by adopting a visco-elastic constitutive model to obtain a change rule of the characteristic parameters of the asphalt visco-elastic property, and analyzing an evolution rule of the asphalt creep damage.
2. The asphalt multistage creep damage testing method according to claim 1, characterized in that in the first step, the asphalt is No. 90 base asphalt, the stress scanning test conditions are that the test temperature is 50 ℃, the load application frequency is 5Hz, and the linear viscoelastic range of the asphalt is determined to be 0-10100 Pa; the frequency scanning test temperature is 50 ℃, and the load is controlled to be 2000 Pa; the test conditions of the creep test are 50 ℃, and the controlled load is 3500 Pa.
3. The asphalt multistage creep damage testing method according to claim 1, characterized in that in step two, 17 frequency sweep test nodes are set.
4. The asphalt multi-stage creep damage testing method according to claim 1, characterized in that in the third step, the frequency of the frequency sweep test is 5Hz, 10Hz, 15Hz, 20Hz, 30Hz, 40Hz and 60 Hz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810047304.1A CN108344663B (en) | 2018-01-18 | 2018-01-18 | Asphalt multi-stage creep damage testing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810047304.1A CN108344663B (en) | 2018-01-18 | 2018-01-18 | Asphalt multi-stage creep damage testing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108344663A CN108344663A (en) | 2018-07-31 |
| CN108344663B true CN108344663B (en) | 2020-06-30 |
Family
ID=62960824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810047304.1A Active CN108344663B (en) | 2018-01-18 | 2018-01-18 | Asphalt multi-stage creep damage testing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108344663B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110031611B (en) * | 2019-04-19 | 2022-02-11 | 哈尔滨工业大学 | Multi-population genetic algorithm-based fractional order viscoelasticity model parameter identification method |
| CN110186811B (en) * | 2019-07-01 | 2021-06-25 | 哈尔滨工业大学 | Method for testing microcosmic dynamic rheological property of asphalt |
| CN110186810A (en) * | 2019-07-01 | 2019-08-30 | 哈尔滨工业大学 | The non-linear rheology characteristic test method of pitch of stress substantially oscillatory shear load |
| CN110907311B (en) * | 2019-12-04 | 2021-12-24 | 哈尔滨工业大学 | Improved method for testing dynamic rheological property of emulsified asphalt |
| CN115235879B (en) * | 2021-04-23 | 2024-06-28 | 广州特种设备检测研究院(广州市特种设备事故调查技术中心、广州市电梯安全运行监控中心) | Prediction method for creep compliance of polyethylene gas pipe |
| CN113433305B (en) * | 2021-06-24 | 2022-04-26 | 哈尔滨工业大学 | Asphalt self-healing capability evaluation method for separating thixotropy influence |
| 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 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5187987A (en) * | 1991-11-19 | 1993-02-23 | The Pennsylvania Research Corporation | Bending beam creep test device with piston having a gas bearing |
| CN102393338A (en) * | 2011-07-26 | 2012-03-28 | 哈尔滨工业大学 | Method for separating influences of fatigue damage and thixotropic factor on asphalt modulus |
| CN102654438A (en) * | 2011-03-04 | 2012-09-05 | 同济大学 | Test method for testing dynamic shear creep property of bituminous mixture |
| CN104598669A (en) * | 2014-12-22 | 2015-05-06 | 重庆交通大学 | Method for forecasting permanent deformation of bituminous mixture pavement |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2614371C (en) * | 2005-07-05 | 2015-03-24 | Ohio University | Gravity flowmeter for materials analysis |
-
2018
- 2018-01-18 CN CN201810047304.1A patent/CN108344663B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5187987A (en) * | 1991-11-19 | 1993-02-23 | The Pennsylvania Research Corporation | Bending beam creep test device with piston having a gas bearing |
| CN102654438A (en) * | 2011-03-04 | 2012-09-05 | 同济大学 | Test method for testing dynamic shear creep property of bituminous mixture |
| CN102393338A (en) * | 2011-07-26 | 2012-03-28 | 哈尔滨工业大学 | Method for separating influences of fatigue damage and thixotropic factor on asphalt modulus |
| CN104598669A (en) * | 2014-12-22 | 2015-05-06 | 重庆交通大学 | Method for forecasting permanent deformation of bituminous mixture pavement |
Non-Patent Citations (3)
| Title |
|---|
| SBS改性沥青的老化机理;蔡婷婷;《中国优秀硕士学位论文全文数据库工程科技II辑》;20170315(第3期);第20-33页 * |
| 基于黏弹特性的沥青普适本构模型研究;徐亚男;《中国优秀硕士学位论文全文数据库工程科技II辑》;20170215(第02期);第8-66页 * |
| 沥青及沥青混合料老化过程中的粘弹性能研究;马莉骍;《中国博士学位论文全文数据库工程科技II辑》;20121115(第11期);第29,83页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108344663A (en) | 2018-07-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108344663B (en) | Asphalt multi-stage creep damage testing method | |
| Evans et al. | Direct conversion of rheological compliance measurements into storage and loss moduli | |
| CN103063528B (en) | Method for fast evaluating high temperate member residual service life on spot | |
| CN107843510B (en) | Method for estimating residual endurance life of supercritical unit T/P91 heat-resistant steel based on room-temperature Brinell hardness prediction | |
| CN102331377B (en) | Method for evaluating creep performance of T/P92 steel | |
| CN105158085A (en) | Compound polyimide retainer storage life prediction method | |
| CN106815419B (en) | Online evaluation method for crane running state based on crack information prediction | |
| CN103383659B (en) | A kind of software acceleration lifetest method | |
| US9612933B2 (en) | Method for deterministic stress based risk reduction | |
| CN109613221A (en) | A kind of test method of test road asphalt damage self-healing performance | |
| CN112362511B (en) | Method for determining fatigue evaluation index of asphalt material based on Fourier rheology | |
| CN107843509B (en) | Method for estimating residual endurance life of supercritical unit T/P92 heat-resistant steel based on room-temperature Brinell hardness prediction | |
| CN111024528A (en) | Method for measuring viscoelastic parameters of asphalt mixture | |
| CN110907311B (en) | Improved method for testing dynamic rheological property of emulsified asphalt | |
| CN105093166A (en) | Electronic watt-hour meter field inspection method | |
| CN103308507B (en) | A kind of analysis method of free-NCO in quick mensuration polyurethane | |
| CN106556643B (en) | A kind of metal material Cold Brittleness Transition Temperature measuring method | |
| CN110398349B (en) | Active medical instrument reliability test method based on typical environmental stress | |
| CN113686707B (en) | Asphalt fatigue performance testing and evaluating method for separating thixotropy and nonlinear influence | |
| Forstner et al. | The application of data mining in bridge monitoring projects: exploiting time series data of structural health monitoring | |
| CN202929473U (en) | Closed loop control system dynamic performance index testing device | |
| CN113238134A (en) | Screening test system and method of SLD light source assembly for optical fiber current sensor | |
| RU2526299C1 (en) | Method to determine durability of ceramic items | |
| CN110333148B (en) | Soil dynamic shear modulus testing method based on fine analysis of vibration attenuation curve | |
| CN109782743B (en) | Working condition analysis and judgment method and system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |