CN117030985A - Method for measuring and calculating contribution rate of heat, oxygen and light to asphalt aging - Google Patents
Method for measuring and calculating contribution rate of heat, oxygen and light to asphalt aging Download PDFInfo
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- 239000010426 asphalt Substances 0.000 title claims abstract description 350
- 230000032683 aging Effects 0.000 title claims abstract description 221
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 60
- 239000001301 oxygen Substances 0.000 title claims abstract description 60
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 32
- 230000008878 coupling Effects 0.000 claims abstract description 76
- 238000010168 coupling process Methods 0.000 claims abstract description 76
- 238000005859 coupling reaction Methods 0.000 claims abstract description 76
- 238000005259 measurement Methods 0.000 claims abstract description 67
- 238000009529 body temperature measurement Methods 0.000 claims description 105
- 230000007613 environmental effect Effects 0.000 abstract description 17
- 238000012360 testing method Methods 0.000 description 44
- 238000010438 heat treatment Methods 0.000 description 36
- 238000009413 insulation Methods 0.000 description 12
- 238000005286 illumination Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 7
- 238000001035 drying Methods 0.000 description 6
- 230000005855 radiation Effects 0.000 description 5
- 238000003878 thermal aging Methods 0.000 description 5
- 230000003197 catalytic effect Effects 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000001291 vacuum drying Methods 0.000 description 3
- 206010051246 Photodermatosis Diseases 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 230000001808 coupling effect Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000003679 aging effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- -1 ultraviolet rays Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
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Abstract
The invention provides a method for measuring and calculating the contribution rate of heat, oxygen and light to asphalt aging. The method comprises the following steps: respectively carrying out single-factor aging and coupling aging of at least two factors on the baked multiple asphalt samples to obtain aged single-factor aged asphalt samples and coupling factor aged asphalt samples; scanning measurement at different temperatures is respectively carried out on each asphalt sample in the single-factor aging asphalt sample, the coupling factor aging asphalt sample and the original asphalt sample, so as to obtain measurement parameters corresponding to each asphalt sample; and calculating according to the measurement parameters corresponding to each asphalt sample to obtain the aging contribution rate of the corresponding asphalt sample. The invention can clearly determine the influence of different environmental factors on the aging contribution rate of the asphalt sample.
Description
Technical Field
The invention relates to the technical field of testing or analyzing asphalt materials, in particular to a method for measuring and calculating the contribution rate of heat, oxygen and light to asphalt aging.
Background
Asphalt pavement is exposed in complex environment for a long time, is influenced by external factors such as high temperature, sunlight, oxygen and the like, and is easy to cause cracking, peeling, rutting and other diseases, so that the service life of the asphalt pavement is far lower than the design life.
Because the aging period of the natural aging asphalt test sample is long, the main means for researching the aging behavior of the asphalt pavement at home and abroad at present is to develop an indoor simulation aging test, asphalt aging factors considered in the test are still concentrated on factors such as thermal oxygen, ultraviolet rays, water and the like, and the influence of a single factor on asphalt aging is analyzed by accelerating asphalt aging simulation.
However, because the environmental factors are complex and various, the influence degree of the environmental factors in different areas on the aging of asphalt is also different, so that the asphalt cannot be comprehensively described by a single factor, the influence of the different environmental factors on the contribution rate of the aging of asphalt cannot be clearly determined, and the asphalt pavement in different environmental areas cannot be relatively protected.
Disclosure of Invention
The embodiment of the invention provides a method for measuring and calculating the contribution rate of heat, oxygen and light to asphalt aging, which aims to solve the problem that the contribution rate of asphalt aging under the action of environment in the prior art cannot be accurately calculated.
In a first aspect, an embodiment of the present invention provides a method for measuring and calculating a contribution rate of heat, oxygen, and light to asphalt aging, including:
respectively carrying out single-factor aging and coupling aging of at least two factors on the baked multiple asphalt samples to obtain aged single-factor aged asphalt samples and coupling factor aged asphalt samples;
scanning measurement at different temperatures is carried out on each asphalt sample in the single-factor aging asphalt sample, the coupling factor aging asphalt sample and the original asphalt sample respectively, so that measurement parameters corresponding to each asphalt sample are obtained;
and calculating according to the measurement parameters corresponding to each asphalt sample to obtain the aging contribution rate of the corresponding asphalt sample.
In one possible implementation manner, scanning measurement of different temperatures is performed on each of the single factor aged asphalt sample, the coupling factor aged asphalt sample and the raw asphalt sample, so as to obtain measurement parameters corresponding to each asphalt sample, including:
scanning measurement of different temperatures in a first preset temperature range is respectively carried out on each asphalt sample in the single factor aging asphalt sample, the coupling factor aging asphalt sample and the original asphalt sample by adopting a dynamic shear rheometer, so as to obtain high temperature measurement parameters corresponding to the different temperatures in the first preset temperature range; the temperature step length between adjacent temperatures in the first preset temperature range is a preset fixed step length;
and determining a high-temperature measurement parameter corresponding to the first preset temperature in the high-temperature measurement parameters as a target high-temperature measurement parameter.
In one possible implementation manner, the obtaining the high temperature measurement parameters corresponding to different temperatures in the first preset temperature range includes:
obtaining first complex shear modulus and first phase angle corresponding to different temperatures in the first preset temperature range;
calculating a rutting factor according to a first complex shear modulus and a first phase angle corresponding to the same temperature;
the determining that the high temperature measurement parameter corresponding to the first preset temperature in the high temperature measurement parameters is the target high temperature measurement parameter includes:
and determining a rut factor corresponding to the first preset temperature in the high-temperature measurement parameters as a target high-temperature measurement parameter.
In one possible implementation manner, scanning measurement of different temperatures is performed on each of the single factor aged asphalt sample, the coupling factor aged asphalt sample and the raw asphalt sample, so as to obtain measurement parameters corresponding to each asphalt sample, including:
scanning measurement of different temperatures in a second preset temperature range is respectively carried out on each asphalt sample in the single factor aging asphalt sample, the coupling factor aging asphalt sample and the original asphalt sample by adopting a dynamic shear rheometer, so that medium temperature measurement parameters corresponding to different temperatures in the second preset temperature range are obtained; the second preset temperature range includes a plurality of different second preset temperatures;
and determining a medium temperature measurement parameter corresponding to a third preset temperature in the medium temperature measurement parameters as a target medium temperature measurement parameter.
In one possible implementation manner, obtaining the medium temperature measurement parameters corresponding to different temperatures in the second preset temperature range includes:
obtaining a second complex shear modulus, a second phase angle and an angular frequency corresponding to different temperatures in the second preset temperature range;
calculating a G-R value according to a second complex shear modulus, a second phase angle and an angular frequency corresponding to the same temperature;
the step of determining the medium temperature measurement parameter corresponding to the third preset temperature in the medium temperature measurement parameters as the target medium temperature measurement parameter comprises the following steps:
and determining a G-R value corresponding to a third preset temperature and a preset angular frequency in the medium temperature measurement parameters as a target medium temperature measurement parameter.
In one possible implementation manner, scanning measurement of different temperatures is performed on each of the single factor aged asphalt sample, the coupling factor aged asphalt sample and the raw asphalt sample, so as to obtain measurement parameters corresponding to each asphalt sample, including:
scanning measurement of different temperatures in a third preset temperature range is respectively carried out on each asphalt sample in the single factor aging asphalt sample, the coupling factor aging asphalt sample and the original asphalt sample by adopting a dynamic shear rheometer, so as to obtain low-temperature measurement parameters corresponding to different temperatures in the third preset temperature range; the third preset temperature range includes a plurality of different fourth preset temperatures;
and determining a low-temperature measurement parameter corresponding to a fifth preset temperature in the low-temperature measurement parameters as a target low-temperature measurement parameter.
In one possible implementation manner, the calculating to obtain the aging contribution rate of each asphalt sample according to the measurement parameter corresponding to each asphalt sample includes:
respectively calculating corresponding initial asphalt aging contribution rates according to target high-temperature measurement parameters, target medium-temperature measurement parameters and target low-temperature measurement parameters corresponding to each asphalt sample;
the average value of all initial asphalt aging contribution rates corresponding to each asphalt sample is taken as the aging contribution rate of the corresponding asphalt sample.
In one possible implementation, the formula for calculating the initial bitumen aging contribution rate is
；
Wherein,representing the aging contribution rate of the single-factor aged asphalt sample or the first coupling factor aged asphalt sample; />Indicating the target measurement parameters corresponding to the single factor aged asphalt sample or the first coupling factor aged asphalt sample, < ->Indicating the corresponding target measurement parameters of the raw asphalt sample, < ->Representing target measurement parameters corresponding to the second coupling factor aged asphalt sample; the target measurement parameters comprise target temperature measurement parameters, target medium temperature measurement parameters or target low temperature measurement parameters, the first coupling factor aged asphalt sample is a two-factor coupled aged asphalt sample in the coupling factor aged asphalt sample, and the second coupling factor aged asphalt sample is a three-factor coupled aged asphalt sample in the coupling factor aged asphalt sample.
The embodiment of the invention provides a method for measuring and calculating the contribution rate of heat, oxygen and light to asphalt aging, which comprises the steps of respectively carrying out single-factor aging and coupling aging of at least two factors on a plurality of baked asphalt samples to obtain aged single-factor aged asphalt samples and coupling factor aged asphalt samples; scanning measurement at different temperatures is respectively carried out on each asphalt sample in the single-factor aging asphalt sample, the coupling factor aging asphalt sample and the original asphalt sample, so as to obtain measurement parameters corresponding to each asphalt sample; according to the measurement parameters corresponding to each asphalt sample, the aging contribution rate of the corresponding asphalt sample is calculated, so that the influence of environmental factors of single factors and coupling factors on the asphalt sample can be fully considered, the influence of different environmental factors on the aging contribution rate of the asphalt sample is clear, the prediction accuracy of asphalt performance of different areas is improved, and asphalt pavement of different environmental areas can be timely and relevant protected.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments or the description of the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of an implementation of a method for measuring and calculating the contribution rate of heat, oxygen and light to asphalt aging, which is provided by the embodiment of the invention;
FIG. 2 is a schematic diagram of a test pair of bitumen ageing contribution rates provided by an embodiment of the present invention;
FIG. 3 is a schematic diagram of the asphalt aging contribution rate corresponding to test II provided by the embodiment of the invention;
FIG. 4 is a schematic diagram of the asphalt aging contribution rate corresponding to test III provided by the embodiment of the invention;
FIG. 5 is a schematic diagram of the asphalt aging contribution rate corresponding to test four provided by the embodiment of the invention.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth such as the particular system architecture, techniques, etc., in order to provide a thorough understanding of the embodiments of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the following description will be made by way of specific embodiments with reference to the accompanying drawings.
Fig. 1 is a flowchart of an implementation of a method for measuring and calculating the contribution rate of heat, oxygen and light to asphalt aging according to an embodiment of the present invention, which is described in detail below:
and 101, respectively carrying out single-factor aging and coupling aging of at least two factors on the baked multiple asphalt samples to obtain aged single-factor aged asphalt samples and coupling factor aged asphalt samples.
Prior to aging the asphalt sample, the unaged raw asphalt sample, which may be referred to herein as sample 0, is first baked.
And (3) placing the unaged raw asphalt sample into a flat-bottom square plate, wherein the thickness of the asphalt film is 1mm, placing into an oven for heating, and baking the asphalt film until the asphalt film is completely flattened to obtain a baked asphalt sample.
In order to calculate the contribution rates of heat, oxygen and light to the aging of the asphalt sample, the three factors of heat, oxygen and light are independently stripped out for testing, two-by-two coupling for testing and three factor coupling for testing, namely, the baked asphalt sample is put into an environmental aging box for respectively carrying out heat aging, oxygen aging, ultraviolet light aging, heat-oxygen coupling aging, heat-ultraviolet light coupling aging, oxygen-ultraviolet light coupling aging and heat-oxygen-ultraviolet light coupling aging.
Placing the dried asphalt sample into a vacuum drying oven, exhausting air to a vacuum state, setting the temperature to 60 ℃ and 80 ℃, isolating illumination, and heating for 2 days and 4 days to obtain a heat-aged asphalt sample; it should be noted that four heat-aged asphalt samples were obtained here: isolating illumination at 60 ℃ and heating for 2 days; isolating illumination at 80 ℃ for 2 days; isolating illumination at 60 ℃ and heating for 4 days; the temperature is 60 ℃, the illumination is isolated, and the heating time is 4 days.
Placing the dried asphalt sample into a vacuum drying oven, communicating the drying oven with the outside, setting the temperature to 20 ℃, isolating illumination, and heating for 2 days and 4 days to obtain an oxygen-aged asphalt sample; it should be noted that two samples of the oxygen aged asphalt were obtained here: isolating illumination at 20 ℃ for 2 days; the temperature is 20 ℃, the illumination is isolated, and the heating time is 4 days.
Sealing square tray containing baked asphalt sample with transparent quartz glass plate and glass cement, adding appropriate amount of deoxidizer on the inner wall side of square tray, placing into comprehensive aging environment box, controlling temperature and ultraviolet radiation intensity, setting temperature at 20deg.C, and ultraviolet radiation intensity at 1000W/m 2 Heating for 2 days and 4 days to obtain an ultraviolet aged asphalt sample;
placing the dried asphalt sample into a vacuum drying oven, communicating the drying oven with the outside, setting the temperature to 60 ℃ and 80 ℃, isolating illumination, and heating for 2 days and 4 days to obtain a heat-oxygen coupling aged asphalt sample;
sealing square tray containing baked asphalt sample with transparent quartz glass plate and glass cement, adding appropriate amount of deoxidizer on the inner wall side of square tray, placing into comprehensive aging environment box, setting temperature at 60deg.C and 80deg.C, and ultraviolet radiation intensity at 1000W/m 2 Heating for 2 days and 4 days to obtain a heat-ultraviolet light coupling aged asphalt sample;
placing the baked asphalt sample into a comprehensive aging environment box, setting the temperature to 20 ℃ and the ultraviolet radiation intensity to 1000W/m 2 Heating for 2 days and 4 days to obtain an oxygen-ultraviolet light coupling aged asphalt sample;
placing the baked asphalt sample into a comprehensive aging environment box, setting the temperature to 60 ℃ and 80 ℃ and the ultraviolet radiation intensity to 1000W/m 2 And heating for 2 days and 4 days to obtain the heat-oxygen-ultraviolet light coupling aged asphalt sample.
According to the aging process, a plurality of single-factor aged asphalt samples, a plurality of coupling factor aged asphalt samples and a raw asphalt sample can be obtained.
And 102, respectively carrying out scanning measurement at different temperatures on each asphalt sample in the single-factor aged asphalt sample, the coupling-factor aged asphalt sample and the raw asphalt sample to obtain corresponding measurement parameters of each asphalt sample.
In this embodiment, each asphalt sample obtained in step 101 is measured respectively, and the tool used in the measurement is a dynamic shear rheometer, which can avoid the empirical deficiency of the traditional physical index to a certain extent, and the rheological index of the aged asphalt sample obtained in step 101 can be measured to determine the resistance of asphalt to rutting, fatigue, cracking and the like, so as to truly reflect the rheological characteristics of asphalt. Each aged asphalt sample obtained in 101 was tested for high temperature, medium temperature and low temperature performance using a dynamic shear rheometer, respectively.
(1) And testing the high-temperature performance of the asphalt sample by adopting a dynamic shear rheometer.
In an embodiment, scanning measurement of different temperatures is performed on each of the single-factor aged asphalt sample, the coupling-factor aged asphalt sample, and the raw asphalt sample to obtain measurement parameters corresponding to each asphalt sample, including:
scanning measurement of different temperatures in a first preset temperature range is respectively carried out on each asphalt sample in the single-factor aging asphalt sample, the coupling factor aging asphalt sample and the original asphalt sample by adopting a dynamic shear rheometer, so as to obtain high-temperature measurement parameters corresponding to the different temperatures in the first preset temperature range; the temperature step length between adjacent temperatures in the first preset temperature range is a preset fixed step length;
and determining a high-temperature measurement parameter corresponding to the first preset temperature in the high-temperature measurement parameters as a target high-temperature measurement parameter.
It should be noted that, the first preset temperature range and the preset fixed step length may be set according to the requirement, and in this embodiment, the first preset temperature range may be [46 ℃,82 ℃ ], that is, a temperature range greater than or equal to 46 ℃ and less than or equal to 82 ℃. The preset fixed step size may be 6 ℃.
The dynamic shear rheometer measurement uses a program with an angular frequency of 10 rad/s and the clamp diameter of 25mm, where the clamp is the tool holding the asphalt sample. At temperature scan testWherein the initial temperature is 46 ℃, the temperature rise interval is 6 ℃ until the rutting factorThe test was ended below 1 kPa. Corresponding complex shear modulus +.>Phase angle->。
Optionally, obtaining a first complex shear modulus and a first phase angle corresponding to different temperatures in a first preset temperature range; and then calculating the rutting factor according to the first complex shear modulus and the first phase angle corresponding to the same temperature.
Alternatively, according toAnd calculating to obtain a corresponding rut factor, wherein the unit of the rut factor is kPa. The rutting factor is used for representing the high-temperature rutting resistance of the asphalt material, and the magnitude of the index value is in positive correlation with the high-temperature rutting resistance.
In an embodiment, determining the high temperature measurement parameter corresponding to the first preset temperature in the high temperature measurement parameters as the target high temperature measurement parameter includes: and determining a rut factor corresponding to the first preset temperature in the high-temperature measurement parameters as a target high-temperature measurement parameter.
The first preset temperature may be 64 ℃. The target temperature measurement parameter is a rut factor corresponding to 64 ℃.
(2) And testing the medium temperature performance of the asphalt sample by adopting a dynamic shear rheometer.
In an embodiment, scanning measurement of different temperatures is performed on each of the single-factor aged asphalt sample, the coupling-factor aged asphalt sample, and the raw asphalt sample to obtain measurement parameters corresponding to each asphalt sample, including:
scanning measurement of different temperatures in a second preset temperature range is respectively carried out on each asphalt sample in the single-factor aging asphalt sample, the coupling factor aging asphalt sample and the original asphalt sample by adopting a dynamic shear rheometer, so that medium temperature measurement parameters corresponding to the different temperatures in the second preset temperature range are obtained; the second preset temperature range includes a plurality of different second preset temperatures;
and determining a medium temperature measurement parameter corresponding to a third preset temperature in the medium temperature measurement parameters as a target medium temperature measurement parameter.
The second preset temperature range may be set according to actual requirements, and in this embodiment, the second preset temperature range may be [5 ℃ and 20 ℃ ], that is, a temperature range greater than or equal to 5 ℃ and less than or equal to 20 ℃.
When a medium temperature measurement test is performed, the diameter of the adopted clamp is 8mm, different temperatures in the adopted second preset temperature range can be 5 ℃, 15 ℃ and 20 ℃, frequency scanning is performed at 1% strain, and corresponding complex shear modulus, phase angle and angular frequency are obtained through measurement.
According to the complex shear modulus and the phase angle under the corresponding conditions obtained by measurement, when the G-R value is obtained by calculation, first, second complex shear modulus, second phase angle and angular frequency corresponding to different temperatures in a second preset temperature range are obtained; and then calculating the G-R value according to the second complex shear modulus, the second phase angle and the angular frequency corresponding to the same temperature.
Optionally, calculating the G-R value according to a second complex shear modulus, a second phase angle, and an angular frequency corresponding to the same temperature includes: according toCalculating a G-R value;
wherein,G-R value corresponding to a certain temperature is expressed in kPa, (-)>Indicating the angular frequency.
Optionally, determining the medium temperature measurement parameter corresponding to the third preset temperature in the medium temperature measurement parameters as the target medium temperature measurement parameter includes:
and determining a G-R value corresponding to the third preset temperature and the preset angular frequency in the medium temperature measurement parameters as a target medium temperature measurement parameter.
Here, the third preset temperature and the preset angular frequency are values set according to requirements, for example, the third preset temperature may be 15 ℃, and the preset angular frequency may be 0.005rad/s.
(3) And testing the low-temperature performance of the asphalt sample by adopting a dynamic shear rheometer.
Scanning measurement of different temperatures is carried out on each asphalt sample in the single-factor aging asphalt sample, the coupling factor aging asphalt sample and the original asphalt sample respectively to obtain corresponding measurement parameters of each asphalt sample, wherein the method comprises the following steps:
scanning measurement of different temperatures in a third preset temperature range is respectively carried out on each asphalt sample in the single-factor aging asphalt sample, the coupling factor aging asphalt sample and the original asphalt sample by adopting a dynamic shear rheometer, so as to obtain low-temperature measurement parameters corresponding to the different temperatures in the third preset temperature range; the third preset temperature range includes a plurality of different fourth preset temperatures;
and determining a low-temperature measurement parameter corresponding to a fifth preset temperature in the low-temperature measurement parameters as a target low-temperature measurement parameter.
When the asphalt sample measurement test is carried out, the diameter of the selected fixture is 4mm. The third preset temperature range may be [ -18 ℃, -6 ℃ ], i.e. a temperature range of-18 ℃ or more and-6 ℃ or less, for example the fourth preset temperature may be-18 ℃, -12 ℃, -6 ℃. The frequency can be 100rad/s to 0.01rad/s, and the strain is 0.1%; finally, asphalt low-temperature test is carried out, and creep stiffness modulus at the temperature of-12 ℃ is determined as a target low-temperature measurement parameter. The units of creep stiffness modulus are MPa.
And step 103, calculating according to the measurement parameters corresponding to each asphalt sample to obtain the aging contribution rate of the corresponding asphalt sample.
When the asphalt contribution rate is calculated, the test result of heat-oxygen-ultraviolet light coupling aging is taken as a main body, and the test result under the independent action of one or two coupling factors is compared with the main body, so that the percentage of the test result influenced by the factor in the main body is obtained, and the specific gravity is the contribution rate of the selected condition.
In one embodiment, this step may include:
respectively calculating corresponding initial asphalt aging contribution rates according to target high-temperature measurement parameters, target medium-temperature measurement parameters and target low-temperature measurement parameters corresponding to each asphalt sample;
the average value of all initial asphalt aging contribution rates corresponding to each asphalt sample is taken as the aging contribution rate of the corresponding asphalt sample.
Alternatively, the formula for calculating the initial asphalt aging contribution rate is
；
Wherein,representing the aging contribution rate of the single-factor aged asphalt sample or the first coupling factor aged asphalt sample; />Indicating the target measurement parameters corresponding to the single factor aged asphalt sample or the first coupling factor aged asphalt sample, < ->Indicating the corresponding target measurement parameters of the raw asphalt sample, < ->Representing target measurement parameters corresponding to the second coupling factor aged asphalt sample; the target measurement parameters comprise target temperature measurement parameters, target medium temperature measurement parameters or target low temperature measurement parameters, wherein the first coupling factor aging asphalt sample is a two-factor coupling aging asphalt sample in the coupling factor aging asphalt sample, and the second coupling factor aging asphalt sample is a three-factor coupling aging asphalt sample in the coupling factor aging asphalt sample.
For example, when the aging contribution rate of the heat-aged asphalt sample is calculated, corresponding target high-temperature measurement parameters, target medium-temperature measurement parameters and target low-temperature measurement parameters can be obtained according to the step 102, namely, the rutting factor corresponding to 64 ℃, the G-R value with the preset angular frequency of 0.005rad/s at the medium temperature of 15 ℃ and the creep stiffness modulus at the temperature of-12 ℃ are obtained.
And calculating to obtain target temperature measurement parameters, target medium temperature measurement parameters and target low temperature measurement parameters of the original asphalt sample, and obtaining target high temperature measurement parameters, target medium temperature measurement parameters and target low temperature measurement parameters of the three-factor coupling instant heating-oxygen-ultraviolet light coupling aged asphalt sample.
Firstly, calculating a first initial asphalt aging contribution rate corresponding to a rutting factor of a heat aging asphalt sample; the rut factor corresponding to 64 ℃ is taken asTarget temperature measurement parameter of raw asphalt sample as +.>Target high-temperature measurement parameters of heat-oxygen-ultraviolet light coupling aging asphalt sample are used as +.>Carry in->Is calculated.
Then calculating a second initial asphalt aging contribution rate corresponding to the G-R value of the heat aging asphalt sample; the G-R value with the preset angular frequency of 0.005rad/s at the medium temperature of 15 ℃ is taken asTarget mesophilic measurement parameter of raw asphalt sample as +.>Target medium temperature measurement parameters of heat-oxygen-ultraviolet light coupled aged asphalt sample are used as +.>Carry in->Is calculated.
Finally, calculating a third initial asphalt aging contribution rate corresponding to the creep stiffness modulus of the heat aging asphalt sample; creep stiffness modulus at-12 ℃ asTarget low-temperature measurement parameters of raw asphalt sample as +.>Target low-temperature measurement parameters of heat-oxygen-ultraviolet light coupling aging asphalt sample are used as +.>Carry in->Is calculated.
And calculating the average value of the first initial asphalt aging contribution rate, the second initial asphalt aging contribution rate and the third initial asphalt aging contribution rate, wherein the average value is the aging contribution rate of the heat aging asphalt sample.
Similarly, the aging contribution rate of the heat-aged asphalt sample, the aging contribution rate of the ultraviolet light-aged asphalt sample, the aging contribution rate of the heat-oxygen coupled aged asphalt sample, the aging contribution rate of the heat-ultraviolet light coupled aged asphalt sample and the aging contribution rate of the oxygen-ultraviolet light coupled aged asphalt sample can be calculated by referring to the method for calculating the aging contribution rate of the heat-aged asphalt sample.
In order to determine the contribution rate of different environmental factors to asphalt aging, consider the aging and coupling effects of various factors on asphalt, distinguish the influence degree of each factor on asphalt aging, have important influence on asphalt pavement performance, and verify the effectiveness of calculating the asphalt aging contribution rate in the scheme through a plurality of tests.
Test one: selecting No. 70 matrix asphalt, placing the asphalt into an oven for heating at 135 ℃, placing 18.9g of asphalt sample into a flat-bottom square plate with the size of 165mm or 1150mm or 20mm, placing the asphalt into the oven for heating at 135 ℃ and drying the asphalt film to be completely flattened, wherein the thickness of the asphalt film is 1 mm.
The baked asphalt sample was placed in an environmental aging oven and subjected to thermal aging (heating temperature 60 ℃, oxygen removal, light insulation), oxygen aging (temperature 20 ℃, light insulation), ultraviolet light aging (temperature 20 ℃, oxygen removal), thermo-oxygen coupled aging (heating temperature 60 ℃, light insulation), thermo-ultraviolet light coupled aging (heating temperature 60 ℃, oxygen removal), oxygen-ultraviolet light coupled aging (temperature 20 ℃) and thermo-oxygen-ultraviolet light (heating temperature 60 ℃) coupled aging, respectively. Wherein the ultraviolet aging test is involved, and the irradiation intensity is unified to be 1000W/m 2 The tests which do not involve oxygen aging and ultraviolet light aging all need to be subjected to anaerobic and light-isolating treatment, and the aging time is unified to be 2 days.
The high temperature, medium temperature and low temperature performance of the asphalt sample is tested by adopting a dynamic shear rheometer:
testing high temperature performance of asphalt sample by dynamic shear rheometer, selecting fixture with diameter of 25mm, selecting procedure with scanning temperature of 46-82 deg.C, temperature step length of 6 deg.C, and angular frequency of 10 rad/s, and testing complex shear modulus of asphalt sampleAnd phase angle->In the temperature scanning experiment, the scanning frequency is 10 rad/s, the initial temperature is 46 ℃, the temperature rising interval is 6 ℃, and the track factor is +.>Under 1 kPa, the complex shear modulus +.>Phase angle->And rut factor->Find out the rut factor +.for the intermediate temperature of 64 DEG C>。
The medium temperature performance of an asphalt sample is tested by adopting a dynamic shear rheometer, a clamp with the diameter of 8mm is selected, the distance between an upper plate and a lower plate is set to be 2mm, frequency scanning is carried out at three temperatures of 5 ℃, 15 ℃ and 25 ℃ and with 1% strain, a complex modulus main curve is obtained, and a Sigmoidal model is utilized to fit the complex shear modulus main curve. Substitution of complex shear modulus and phase angle under corresponding conditionsThe calculation was performed to find the G-R value at a temperature of 15℃and a frequency of 0.005rad/s.
The low-temperature performance of the asphalt sample is tested by adopting a dynamic shear rheometer, a clamp with the diameter of 4mm is selected, and a low-temperature test program and temperature of the asphalt sample are firstly set: -18 ℃, -12 ℃, -6 ℃, frequency: 100rad/s to 0.01rad/s, with a strain of 0.1%; finally, asphalt low-temperature test is carried out to find out creep stiffness modulus at the intermediate temperature of-12 ℃.
For 8 kinds of asphalt before and after aging, the rutting factor at 64 deg.C, G-R value and creep stiffness modulus at-12 deg.C are chosen to be introducedCalculating the contribution rate, and taking the average value of the three groups of data as the final contribution rate. FIG. 2 is a schematic diagram showing the corresponding asphalt aging contribution rate.
And (2) testing II:
selecting No. 70 matrix asphalt, placing the asphalt into an oven for heating at 135 ℃, placing 18.9g of asphalt sample into a flat-bottom square plate with the size of 165mm or 1150mm or 20mm, placing the asphalt into the oven for heating at 135 ℃ and drying the asphalt film to be completely flattened, wherein the thickness of the asphalt film is 1 mm. The baked asphalt sample was placed in an environmental aging oven and subjected to thermal aging (heating temperature 80 ℃, oxygen removal, light insulation), oxygen aging (temperature 20 ℃, light insulation), ultraviolet light aging (temperature 20 ℃, oxygen removal), thermo-oxygen coupled aging (heating temperature 80 ℃, light insulation), thermo-ultraviolet light coupled aging (heating temperature 80 ℃, oxygen removal), oxygen-ultraviolet light coupled aging (temperature 20 ℃) and thermo-oxygen-ultraviolet light (heating temperature 80 ℃) coupled aging, respectively. The ultraviolet light aging test is carried out, the irradiation intensity is unified to 1000W/m < 2 >, the oxygen-insulating and light-isolating treatment is carried out in the test which does not involve the oxygen aging and the ultraviolet light aging, and the aging time is unified to 2 days.
The test mode is the same as that of test one. FIG. 3 is a schematic diagram showing the corresponding asphalt aging contribution rate.
And (3) test III: selecting No. 70 matrix asphalt, placing the asphalt into an oven for heating at 135 ℃, placing 18.9g of asphalt sample into a flat-bottom square plate with the size of 165mm or 1150mm or 20mm, placing the asphalt into the oven for heating at 135 ℃ and drying the asphalt film to be completely flattened, wherein the thickness of the asphalt film is 1 mm. The baked asphalt sample was placed in an environmental aging oven and subjected to thermal aging (heating temperature 60 ℃, oxygen removal, light insulation), oxygen aging (temperature 20 ℃, light insulation), ultraviolet light aging (temperature 20 ℃, oxygen removal), thermo-oxygen coupled aging (heating temperature 60 ℃, light insulation), thermo-ultraviolet light coupled aging (heating temperature 60 ℃, oxygen removal), oxygen-ultraviolet light coupled aging (temperature 20 ℃) and thermo-oxygen-ultraviolet light (heating temperature 60 ℃) coupled aging, respectively. The ultraviolet light aging test is carried out, the irradiation intensity is unified to 1000W/m < 2 >, the oxygen-insulating and light-isolating treatment is carried out in the test which does not involve the oxygen aging and the ultraviolet light aging, and the aging time is unified to 4 days.
The test mode is the same as that of test one. FIG. 4 is a graph showing the corresponding bitumen aging contribution.
And (3) testing four:
selecting No. 70 matrix asphalt, placing the asphalt into an oven for heating at 135 ℃, placing 18.9g of asphalt sample into a flat-bottom square plate with the size of 165mm or 1150mm or 20mm, placing the asphalt into the oven for heating at 135 ℃ and drying the asphalt film to be completely flattened, wherein the thickness of the asphalt film is 1 mm. The baked asphalt sample was placed in an environmental aging oven and subjected to thermal aging (heating temperature 80 ℃, oxygen removal, light insulation), oxygen aging (temperature 20 ℃, light insulation), ultraviolet light aging (temperature 20 ℃, oxygen removal), thermo-oxygen coupled aging (heating temperature 80 ℃, light insulation), thermo-ultraviolet light coupled aging (heating temperature 80 ℃, oxygen removal), oxygen-ultraviolet light coupled aging (temperature 20 ℃) and thermo-oxygen-ultraviolet light (heating temperature 80 ℃) coupled aging, respectively. The ultraviolet light aging test is carried out, the irradiation intensity is unified to 1000W/m < 2 >, the oxygen-insulating and light-isolating treatment is carried out in the test which does not involve the oxygen aging and the ultraviolet light aging, and the aging time is unified to 4 days.
The test mode is the same as that of test one. FIG. 5 is a schematic diagram showing the corresponding asphalt aging contribution rate
As is evident from fig. 2-5, the contribution rate of a single factor is much smaller than the contribution rate of the combined action of the two factors. When the ultraviolet irradiation intensity and the temperature are fixed, the contribution rate of three single factors to asphalt aging basically rises along with the aging time, but the contribution rate of the single factors is smaller. When the ultraviolet irradiation intensity and the aging time are the same, the contribution rate of the heat aging, the oxygen aging, the ultraviolet aging, the heat-light aging and the light-oxygen aging is reduced when the temperature is increased from 60 ℃ to 80 ℃, and only the contribution rate of the heat-oxygen aging is increased. And the contribution rate results of heat-light aging, light-oxygen aging and heat-oxygen aging are all larger than the sum of the corresponding two factors, which shows that the test considers the coupling effect of various factors on asphalt aging. Theoretically, the sum of the contribution rates of heat aging, oxygen aging, and ultraviolet light aging of a single factor plus the catalytic contribution rate between two and the catalytic contribution rate of heat-oxygen-light coupling aging is 1. From the formulaIt can be seen that GI thermo-oxo-photo-aging is constant equal to 1, and the catalytic contribution rate of thermo-oxo-photo-aging can be subtracted from the sum 1 by the contribution rates of thermal aging, oxygen aging and uv aging of a single factor and the catalytic contribution rate between two factors, and the specific results are summarized in the following table.
No. 1, no. 2, no. 3 and No. 4 respectively represent ageing time of 2 days, temperature of 60 ℃, ageing time of 2 days, temperature of 80 ℃, ageing time of 4 days, temperature of 60 ℃, ageing time of 4 days and temperature of 80 ℃; the irradiation intensity is 1000W/m 2 。
According to the embodiment of the invention, the single-factor aging and the coupling aging of at least two factors are respectively carried out on the dried multiple asphalt samples, so that the aged single-factor aging asphalt samples and coupling factor aging asphalt samples are obtained; scanning measurement at different temperatures is respectively carried out on each asphalt sample in the single-factor aging asphalt sample, the coupling factor aging asphalt sample and the original asphalt sample, so as to obtain measurement parameters corresponding to each asphalt sample; according to the method, the aging contribution rate of the corresponding asphalt sample is calculated according to the measurement parameters corresponding to each asphalt sample, so that the influence of environmental factors of single factors and coupling factors on the asphalt sample can be fully considered, the aging contribution rate of different environmental factors on the asphalt sample is defined based on the measurement parameters obtained by scanning measurement of different temperatures, the prediction precision of asphalt performance of different areas is improved, and asphalt pavement of different environmental areas can be timely and relevant protected.
It should be understood that the sequence number of each step in the foregoing embodiment does not mean that the execution sequence of each process should be determined by the function and the internal logic, and should not limit the implementation process of the embodiment of the present invention.
The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention.
Claims (8)
1. A method for measuring and calculating the contribution rate of heat, oxygen and light to asphalt aging is characterized by comprising the following steps:
respectively carrying out single-factor aging and coupling aging of at least two factors on the baked multiple asphalt samples to obtain aged single-factor aged asphalt samples and coupling factor aged asphalt samples;
scanning measurement at different temperatures is carried out on each asphalt sample in the single-factor aging asphalt sample, the coupling factor aging asphalt sample and the original asphalt sample respectively, so that measurement parameters corresponding to each asphalt sample are obtained;
and calculating according to the measurement parameters corresponding to each asphalt sample to obtain the aging contribution rate of the corresponding asphalt sample.
2. The method for measuring and calculating the contribution rate of heat, oxygen and light to asphalt aging according to claim 1, wherein the method for measuring and calculating the contribution rate of heat, oxygen and light to asphalt aging is characterized in that each of the single factor aged asphalt sample, the coupling factor aged asphalt sample and the raw asphalt sample is respectively subjected to scanning measurement at different temperatures to obtain corresponding measurement parameters of each asphalt sample, and the method comprises the following steps:
scanning measurement of different temperatures in a first preset temperature range is respectively carried out on each asphalt sample in the single factor aging asphalt sample, the coupling factor aging asphalt sample and the original asphalt sample by adopting a dynamic shear rheometer, so as to obtain high temperature measurement parameters corresponding to the different temperatures in the first preset temperature range; the temperature step length between adjacent temperatures in the first preset temperature range is a preset fixed step length;
and determining a high-temperature measurement parameter corresponding to the first preset temperature in the high-temperature measurement parameters as a target high-temperature measurement parameter.
3. The method for measuring and calculating the contribution rate of heat, oxygen and light to asphalt aging according to claim 2, wherein the obtaining the high-temperature measurement parameters corresponding to different temperatures in the first preset temperature range comprises:
obtaining first complex shear modulus and first phase angle corresponding to different temperatures in the first preset temperature range;
calculating a rutting factor according to a first complex shear modulus and a first phase angle corresponding to the same temperature;
the determining that the high temperature measurement parameter corresponding to the first preset temperature in the high temperature measurement parameters is the target high temperature measurement parameter includes:
and determining a rut factor corresponding to the first preset temperature in the high-temperature measurement parameters as a target high-temperature measurement parameter.
4. The method for measuring and calculating the contribution rate of heat, oxygen and light to asphalt aging according to claim 1, wherein the method for measuring and calculating the contribution rate of heat, oxygen and light to asphalt aging is characterized in that each of the single factor aged asphalt sample, the coupling factor aged asphalt sample and the raw asphalt sample is respectively subjected to scanning measurement at different temperatures to obtain corresponding measurement parameters of each asphalt sample, and the method comprises the following steps:
scanning measurement of different temperatures in a second preset temperature range is respectively carried out on each asphalt sample in the single factor aging asphalt sample, the coupling factor aging asphalt sample and the original asphalt sample by adopting a dynamic shear rheometer, so that medium temperature measurement parameters corresponding to different temperatures in the second preset temperature range are obtained; the second preset temperature range includes a plurality of different second preset temperatures;
and determining a medium temperature measurement parameter corresponding to a third preset temperature in the medium temperature measurement parameters as a target medium temperature measurement parameter.
5. The method for measuring and calculating the contribution rate of heat, oxygen and light to asphalt aging according to claim 4, wherein obtaining the medium temperature measurement parameters corresponding to different temperatures in the second preset temperature range comprises:
obtaining a second complex shear modulus, a second phase angle and an angular frequency corresponding to different temperatures in the second preset temperature range;
calculating a G-R value according to a second complex shear modulus, a second phase angle and an angular frequency corresponding to the same temperature;
the step of determining the medium temperature measurement parameter corresponding to the third preset temperature in the medium temperature measurement parameters as the target medium temperature measurement parameter comprises the following steps:
and determining a G-R value corresponding to a third preset temperature and a preset angular frequency in the medium temperature measurement parameters as a target medium temperature measurement parameter.
6. The method for measuring and calculating the contribution rate of heat, oxygen and light to asphalt aging according to claim 1, wherein the method for measuring and calculating the contribution rate of heat, oxygen and light to asphalt aging is characterized in that each of the single factor aged asphalt sample, the coupling factor aged asphalt sample and the raw asphalt sample is respectively subjected to scanning measurement at different temperatures to obtain corresponding measurement parameters of each asphalt sample, and the method comprises the following steps:
scanning measurement of different temperatures in a third preset temperature range is respectively carried out on each asphalt sample in the single factor aging asphalt sample, the coupling factor aging asphalt sample and the original asphalt sample by adopting a dynamic shear rheometer, so as to obtain low-temperature measurement parameters corresponding to different temperatures in the third preset temperature range; the third preset temperature range includes a plurality of different fourth preset temperatures;
and determining a low-temperature measurement parameter corresponding to a fifth preset temperature in the low-temperature measurement parameters as a target low-temperature measurement parameter.
7. The method for measuring and calculating the aging contribution rate of heat, oxygen and light to asphalt according to any one of claims 1 to 6, wherein the step of calculating the aging contribution rate of each asphalt sample according to the corresponding measurement parameter of the corresponding asphalt sample comprises the following steps:
respectively calculating corresponding initial asphalt aging contribution rates according to target high-temperature measurement parameters, target medium-temperature measurement parameters and target low-temperature measurement parameters corresponding to each asphalt sample;
the average value of all initial asphalt aging contribution rates corresponding to each asphalt sample is taken as the aging contribution rate of the corresponding asphalt sample.
8. The method for measuring and calculating the aging contribution rate of heat, oxygen and light to asphalt according to claim 7, wherein the formula for calculating the aging contribution rate of initial asphalt is
；
Wherein,representing the aging contribution rate of the single-factor aged asphalt sample or the first coupling factor aged asphalt sample; />Indicating the target measurement parameters corresponding to the single factor aged asphalt sample or the first coupling factor aged asphalt sample, < ->Indicating the corresponding target measurement parameters of the raw asphalt sample, < ->Representing target measurement parameters corresponding to the second coupling factor aged asphalt sample; the target measurement parameters comprise target temperature measurement parameters, target medium temperature measurement parameters or target low temperature measurement parameters, the first coupling factor aged asphalt sample is a two-factor coupled aged asphalt sample in the coupling factor aged asphalt sample, and the second coupling factor aged asphalt sample is a three-factor coupled aged asphalt sample in the coupling factor aged asphalt sample.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108729561A (en) * | 2018-05-31 | 2018-11-02 | 南京金洋防水工程有限公司 | A kind of SBS modified asphalt waterproof coiled materials and its processing technology |
| CN109439005A (en) * | 2018-11-08 | 2019-03-08 | 山东大学 | A kind of ageing-resistant unmade way bitumen regenerant |
| CN113755020A (en) * | 2021-08-20 | 2021-12-07 | 北京工业大学 | Cold region anti-aging asphalt and preparation method thereof |
| CN115029012A (en) * | 2022-08-11 | 2022-09-09 | 北京工业大学 | Asphalt liquid anti-aging agent and preparation method and application thereof |
-
2023
- 2023-08-14 CN CN202311019557.5A patent/CN117030985A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108729561A (en) * | 2018-05-31 | 2018-11-02 | 南京金洋防水工程有限公司 | A kind of SBS modified asphalt waterproof coiled materials and its processing technology |
| CN109439005A (en) * | 2018-11-08 | 2019-03-08 | 山东大学 | A kind of ageing-resistant unmade way bitumen regenerant |
| CN113755020A (en) * | 2021-08-20 | 2021-12-07 | 北京工业大学 | Cold region anti-aging asphalt and preparation method thereof |
| CN115029012A (en) * | 2022-08-11 | 2022-09-09 | 北京工业大学 | Asphalt liquid anti-aging agent and preparation method and application thereof |
Non-Patent Citations (10)
| Title |
|---|
| 王吉生;: "关于沥青光老化试验方法的研究", 工程与建设, no. 05 * |
| 王志军;: "考虑老化作用的沥青胶浆动态粘弹性能试验分析", 公路工程, no. 06, 20 December 2016 (2016-12-20) * |
| 罗代松;田春林;郭猛;谭忆秋;: "改性再生沥青混合料配合比设计及性能验证", 公路交通科技, no. 12 * |
| 聂忆华;胡静轩;: "加拿大沥青改进测力延度试验(DENT)介绍", 中外公路, no. 03, 25 June 2018 (2018-06-25) * |
| 肖鹏;吴美平;蒋德安;: "橡胶沥青紫外光老化性能试验研究", 南京航空航天大学学报, no. 01, 15 February 2013 (2013-02-15) * |
| 肖鹏;蒋德安;吴美平;: "TOR橡胶沥青热氧水老化性能的灰关联分析", 南京理工大学学报, no. 06, 30 December 2012 (2012-12-30) * |
| 袁朝圣: "热光氧耦合条件下SBS改性沥青老化与评价", 中国优秀硕士学位论文全文数据库 工程科技II辑, pages 9 - 37 * |
| 郭猛;刘海清;李亚非;王真: "沥青老化再生过程中的流变与化学特性", 交通运输研究, vol. 6, no. 005 * |
| 陆晓锦;于新;: "不同老化条件对沥青性能的影响", 现代交通技术, no. 04, 26 August 2008 (2008-08-26) * |
| 顾兴宇;姜严旭;周洲;倪富健;: "再生沥青低温抗裂性能评价", 建筑材料学报, no. 03, 17 January 2018 (2018-01-17) * |
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