CN112213475B - Method for measuring asphalt aging parameters - Google Patents
Method for measuring asphalt aging parameters Download PDFInfo
- Publication number
- CN112213475B CN112213475B CN202010919512.3A CN202010919512A CN112213475B CN 112213475 B CN112213475 B CN 112213475B CN 202010919512 A CN202010919512 A CN 202010919512A CN 112213475 B CN112213475 B CN 112213475B
- Authority
- CN
- China
- Prior art keywords
- asphalt
- aging
- aged
- production
- measuring
- 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
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/42—Road-making materials
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
-
- 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
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Pathology (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Biodiversity & Conservation Biology (AREA)
- Ecology (AREA)
- Environmental & Geological Engineering (AREA)
- Environmental Sciences (AREA)
- Road Paving Structures (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a method for measuring asphalt aging parameters, which comprises the steps of aging production asphalt to obtain aged asphalt, and measuring penetration, ductility and softening point of the asphalt before and after aging; adding the aged asphalt into production asphalt in different proportions to obtain mixed asphalt, preparing an asphalt mixture by adopting the mixed asphalt, and measuring the splitting tensile strength and the breaking tensile strain of the asphalt mixture; and then, adopting the addition amount of the aged asphalt and the breaking tensile strain to construct a curve with an inflection point, calculating an asphalt aging index A through the addition amount of the inflection point, the splitting tensile strength value and the breaking tensile strain value, and further calculating an asphalt aging parameter through the aging index, the penetration change rate, the elongation change rate and the softening point change rate. The determination method of the invention can truly and objectively reflect the influence of the asphalt aging degree on the comprehensive performance of the asphalt, and has positive significance for judging the asphalt quality and guiding the field production.
Description
Technical Field
The invention relates to the technical field of asphalt detection, in particular to a method for measuring an asphalt aging parameter.
Background
Along with the development of economic society of China, the demand of people on traffic is gradually increased, and China builds a large number of asphalt pavements in recent years. Many problems are exposed along with the massive construction of asphalt pavements. Generally speaking, after a newly built asphalt pavement is started for 4-5 years, cracks are generated due to the problems of asphalt aging, driving load and the like. In recent years, a large number of cracks are generated on part of highway pavements in the second winter after the highway pavements are built, one crack can be generated along the driving direction by about 5-8 m, and investigation shows that the reason for generating the cracks prematurely is that the asphalt is stored for too long time in the construction process, and the heating temperature is too high in the mixing process, so that the asphalt is aged prematurely, the crack resistance of the asphalt pavement is insufficient, and the cracks are generated prematurely.
At present, the national standard only stipulates the indexes of ductility, penetration ratio, softening point and the like of the aged asphalt; however, the variation trends of these parameters are often different under the same aging conditions. For example, for SBS asphalt, when the aging time is short, the softening point, ductility and penetration degree all show a descending trend; however, as the aging time is prolonged, the ductility and the penetration rate tend to decrease continuously, but the softening point tends to increase. This different tendency of change often makes it difficult to make an effective judgment on the degree of asphalt aging.
In addition, the test index is the performance of the asphalt itself, and the asphalt mixture cannot be directly tested, which causes mismatching with the actual situation on site. On one hand, in the actual production process, the aging degree of the used asphalt is different due to the limitation of field conditions, and the aging condition of the actually used asphalt is unreasonable only by adopting indexes such as penetration ratio, softening point and ductility; on the other hand, the variation trends of the parameters are different, so that the judgment is difficult, the aging degree of the asphalt is difficult to directly and objectively reflect, and the method is difficult to be applied to field production.
Disclosure of Invention
The invention aims to solve the technical problem that the invention provides a method for measuring the asphalt aging parameters, which is simple and can be well suitable for field production; meanwhile, the method can effectively evaluate the aging degree of the asphalt, give direct and objective quantitative indexes and provide basis for judging the performance of the asphalt and guiding the production of asphalt mixtures.
In order to solve the technical problem, the invention provides a method for measuring an asphalt aging parameter, which comprises the following steps:
(1) taking production asphalt, and determining penetration PI of the production asphaltbDuctility DFbAnd softening point SPb；
(2) Aging the production asphalt to obtain aged asphalt, and measuring the penetration PI of the aged asphaltaDuctility DFaAnd softening point SPa；
(3) Adding different amounts of aged asphalt into the production asphalt to obtain a plurality of groups of mixed asphalt; wherein, in the mixed asphalt of the i group, the addition amount of the aged asphalt is ni；
(4) Mixing the mixed asphalt with aggregate and filler according to a preset proportion to obtain a plurality of groups of asphalt mixtures;
(5) preparing the asphalt mixture into a cylindrical test piece;
(6) determining the splitting tensile strength R of the cylindrical test pieceTiAnd breaking tensile strainεTi；
(7) Constructing a curve with an inflection point by using the breaking tensile strain under the condition of different addition amounts of aged asphalt, and taking an asphalt addition value n closest to the inflection pointkSplitting tensile strength value RTkAnd a value of tensile strain to failure ∈Tk；
(8) The aging parameters of the production asphalt are calculated according to the following formula group:
B＝0.5A+0.3expΔPI+0.1expΔDF+0.1expΔSP
A＝ΔεT+lgΔRT
wherein B is an aging parameter of the production asphalt, delta PI is a change rate of penetration before and after aging, delta DF is a change rate of ductility before and after aging, delta SP is a change rate of a softening point before and after aging, and A is an aging index of the production asphalt;
ΔεTfor breaking the rate of change of tensile strain in the general descending phase, εTtThe breaking tensile strain of the cylindrical test piece is determined when the addition amount of the aged asphalt in the mixed asphalt is 100%;
ΔRTthe rate of change of the tensile strength of the cleavage in the normal reduction stage, RTtWhen the addition amount of the aged asphalt in the mixed asphalt is 100%, the splitting tensile strength of the cylindrical test piece is high.
As a modification of the above-mentioned means, in the steps (1) and (2), the needle penetration is measured by the method of T0604 in JTG E20-2011, the ductility is measured by the method of T0605, and the softening point is measured by the method of T0606;
in the step (6), the splitting tensile strength and the breaking tensile strain of the cylindrical test piece are measured according to the method in T0716 in JTG E20-2011.
As an improvement of the technical scheme, in the step (2), the production asphalt is spread into a film with the thickness of 2-5 mm, and then aging is carried out at 150-180 ℃ and under normal pressure for 0.5-5 h; or
Paving the production asphalt into a film with the thickness of 2-5 mm, and then aging at 80-110 ℃ under the pressure of 2-2.5 MPa for 18-28 h.
As an improvement of the technical scheme, in the step (2), the production asphalt is aged according to the method of T0610 in JTG E20-2011.
As an improvement of the technical scheme, in the step (3), the addition amount of the aged asphalt is different in different groups of mixed asphalt; the addition amount of the aged asphalt is in an increasing trend.
As an improvement of the above technical means, in the step (3), the niThe values of (A) are 0%, 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90% and 100% in sequence.
As an improvement of the technical scheme, the production asphalt is SBS modified asphalt.
As an improvement of the above technical scheme, in the step (4), the asphalt mixture mainly comprises the following raw materials in parts by weight:
2-5 parts of mixed asphalt, 90-98 parts of aggregate and 0-5 parts of filler.
As an improvement of the technical scheme, the asphalt mixture is a cold-mix asphalt mixture or a hot-mix asphalt mixture.
As an improvement of the above technical solution, in step (5), a cylindrical test piece is prepared according to the method in T0702 in JTG E20-2011.
The implementation of the invention has the following beneficial effects:
1. aging production asphalt to obtain aged asphalt, adding the aged asphalt into the production asphalt in different proportions to obtain mixed asphalt, preparing an asphalt mixture by using the mixed asphalt, and measuring the splitting tensile strength and the breaking tensile strain of the asphalt mixture; secondly, establishing a curve with an inflection point by adopting the addition amount of the aged asphalt and the breaking tensile strain data, and calculating an asphalt aging parameter A according to the addition amount of the inflection point, the splitting tensile strength value and the breaking tensile strain value; and then integrating the aging parameter A, the penetration change rate, the ductility change rate and the softening point change rate to obtain an asphalt aging parameter B. The determination method provided by the invention directly takes the asphalt mixture as a matrix for testing, can truly and objectively reflect the influence of the asphalt aging degree on the low-temperature crack resistance of the asphalt mixture, and has positive significance for judging the asphalt quality and guiding the field production. Meanwhile, the determination method is simple and direct, and can be well suitable for field production.
2. The invention integrates the existing aging evaluation indexes such as penetration, ductility and softening point and the newly established aging index, establishes a new asphalt aging parameter, and the comprehensive evaluation of the multi-index system can more accurately reflect the aging degree of asphalt.
Drawings
FIG. 1 is a flow chart of a method for determining asphalt aging parameters according to the present invention;
FIG. 2 is a graph of tensile strain to failure for various aged asphalts in example 1 of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, the invention provides a method for measuring an asphalt aging parameter, which comprises the following steps:
s1: measuring penetration degree, ductility and softening point of asphalt for production;
specifically, the needle penetration may be measured by the method of T0604 in JTG E20-2011, the ductility may be measured by the method of T0605, and the softening point may be measured by the method of T0606, but the method is not limited thereto.
Specifically, the determination method of the present invention is applicable to various asphalts; preferably, the determination method of the invention is more suitable for evaluating the aging condition of SBS modified asphalt. The SBS modified asphalt is asphalt obtained by adding a certain SBS modifier into base asphalt; in the aging process, the change rules of the softening point, the penetration degree and the ductility are different from those of the matrix asphalt, and the aging condition of the SBS modified asphalt is difficult to effectively evaluate by adopting the existing system.
S2: aging the production asphalt to obtain aged asphalt; and measuring the penetration, the ductility and the softening point of the needle;
specifically, the production asphalt can be spread into a film with the thickness of 2-5 mm, and then aging is carried out at 150-180 ℃ and normal pressure for 0.5-5 h; or
Paving the production asphalt into a film with the thickness of 2-5 mm, and then aging at 80-110 ℃ under the pressure of 2-2.5 MPa for 18-28 h.
Preferably, the production asphalt is aged by a method of T0610 in road engineering asphalt and asphalt mixture test protocol (JTG E20-2011); specifically, the aging condition is 163 +/-0.5 ℃ and the aging time is 85 min.
Specifically, the needle penetration can be measured by the method in T0604 in JTG E20-2011, the ductility can be measured by the method in T0605, and the softening point can be measured by the method in T0606; but is not limited thereto.
S3: adding aged asphalt into production asphalt to obtain mixed asphalt;
specifically, the production asphalt and the aged asphalt are heated to 90-120 ℃, then mixed, stirred for 5-15 minutes, and then sheared for 30-50 minutes at a speed of 3000-6000 r/min by a high-speed shearing machine, so that the mixed asphalt is obtained. Under the mixing condition, the aged asphalt and the production asphalt are fully mixed, and the obtained mixed asphalt has uniform performance, so that the performances of the mixed asphalt and the aged asphalt are well reflected.
The addition amount of the aged asphalt in different groups of mixed asphalt is different, and the aged asphalt presents an increasing trend, and specifically, the addition amount can be in a gradient increasing manner, a linear increasing manner or an exponential increasing manner, and the like, but is not limited to the above.
Preferably, the addition amount n of the aged asphalt in the mixed asphaltiThe values of (A) are 0%, 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90% and 100% in sequence.
S4: mixing the mixed asphalt with aggregate and filler according to a preset proportion to obtain an asphalt mixture;
specifically, the asphalt mixture is a cold-mix asphalt mixture or a hot-mix asphalt mixture. Preferably, the hot-mixing asphalt mixture is selected, and further, the hot-mixing temperature is controlled to be 95-140 ℃.
Specifically, the invention has no special requirements on the composition of the asphalt mixture, and the technical personnel in the field can determine the composition according to the actual application condition; or the mixture ratio of the asphalt mixture is carried out according to the relevant regulations in technical Specification for constructing asphalt pavements for roads (JTG F40-2017).
Preferably, in the invention, the asphalt mixture mainly comprises the following raw materials in parts by weight: 2-5 parts of mixed asphalt, 90-98 parts of aggregate and 0-5 parts of filler.
S5: preparing a cylindrical test piece from the asphalt mixture;
specifically, a cylindrical test piece is prepared according to a method in T0702 in road engineering asphalt and asphalt mixture test procedures (JTG E20-2011).
S6: measuring the splitting tensile strength and the breaking tensile strain of the cylindrical test piece;
specifically, the splitting tensile strength R of each group of cylindrical test pieces is measured according to a method (measuring temperature of-10 +/-0.5 ℃) in T0716 in road engineering asphalt and asphalt mixture test specification (JTG E20-2011)TiAnd breaking tensile strain εTi。
S7: constructing a curve with an inflection point according to the breaking tensile strain under the condition of different addition amounts of the aged asphalt, and taking an asphalt addition value, a splitting tensile strength value and a breaking tensile strain value which are closest to the inflection point;
specifically, the addition amount n of the aged asphaltiAs abscissa, to break the tensile strain εTiAs a vertical coordinate, constructing a curve by using the breaking tensile strain under the condition of different addition amounts of aged asphalt, and acquiring the inflection point of the curve and the asphalt addition amount value n closest to the inflection pointkSplitting tensile strength value RTkAnd a value of tensile strain to failure ∈Tk。
The construction method of the curve comprises the following steps: adding n of aged asphaltiAs independent variable to break the tensile strain εTiIs a dependent variable; and fitting the multiple groups of corresponding data by adopting an exponential function with a natural constant e as a base, making a trend line, and writing an equation and an error test value to obtain a curve. Wherein, the exponential function can adopt y ═ y0+Ae-x/tOr
(y0、t、t1、t2All are constants), but are not so limited.
S8: calculating the aging parameters of the asphalt for production;
specifically, the aging parameters of the production asphalt are calculated according to the following formula group:
B＝0.5A+0.3expΔPI+0.1expΔDF+0.1expΔSP
A＝ΔεT+lgΔRT
wherein B is an aging parameter of the production asphalt, delta PI is a change rate of penetration before and after aging, delta DF is a change rate of ductility before and after aging, delta SP is a change rate of a softening point before and after aging, and A is an aging index of the production asphalt;
ΔεTfor breaking the rate of change of tensile strain in the general descending phase, εTtThe breaking tensile strain of the cylindrical test piece is determined when the addition amount of the aged asphalt in the mixed asphalt is 100%;
ΔRTthe rate of change of the tensile strength of the cleavage in the normal reduction stage, RTtWhen the addition amount of the aged asphalt in the mixed asphalt is 100%, the splitting tensile strength of the cylindrical test piece is high.
PIbFor penetration of bitumen for production, PIaThe penetration degree of the aged asphalt; DF (Decode-feed)bFor ductility of bitumen for production, DFaDuctility of aged asphalt; SPbFor softening point of bitumen for production, SPaThe softening point of the aged asphalt.
The inventor discovers that in the process of asphalt aging research: the SBS modified asphalt has different variation trends of penetration degree, ductility and softening point from common asphalt in the aging process; the aging degree of the product is difficult to effectively judge by the existing index system. Further, the inventors found through extensive studies that the influence of asphalt aging on the low temperature performance of asphalt tends to be consistent: namely, with the increase of the aging degree of the asphalt, the low-temperature performance of the asphalt mixture tends to decrease sharply and then gradually. In addition, the inventor finds that the change range of ductility and softening point along with the aging degree is small and the sensitivity is low in the research process of SBS modified asphalt, and the change range of the aging index and the penetration degree along with the aging degree is large and the sensitivity is high. Based on the above factors, the inventors have devised a method for measuring the aging parameter. The method of the invention comprehensively considers the aging index, penetration degree, ductility and softening point, can reflect the aging degree of the asphalt more truly, and has positive significance for judging the asphalt quality and guiding the actual production.
Correspondingly, the invention also provides application of the asphalt aging parameter determination method. In particular, the method relates to the application in the preparation of asphalt mixtures, and also relates to the application in the determination and evaluation of asphalt properties.
The invention is further illustrated by the following specific examples:
example 1
The embodiment provides a method for measuring an asphalt aging parameter, which comprises the following steps:
(1) taking production asphalt, and respectively determining penetration PI according to test methods of road engineering asphalt and asphalt mixture test procedures (JTG E20-2011) T0604, T0605 and T0606bDuctility DFbAnd softening point SPb；
(2) Aging the production asphalt according to a test method of road engineering asphalt and asphalt mixture test protocol (JTG E20-2011) T0610 to obtain aged asphalt; and respectively determining penetration PI according to test methods of road engineering asphalt and asphalt mixture test procedures (JTG E20-2011) T0604, T0605 and T0606aDuctility DFaAnd softening point SPa；
The production asphalt and the aged asphalt have the following data:
(3) replacing production asphalt with aged asphalt in the proportion of 0%, 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90% and 100% to form mixed asphalt;
(4) preparing AC-25 type hot-mix asphalt mixture from mixed asphalt with different aging degrees according to technical Specifications for road asphalt pavement construction (JTG F40-2017);
(5) forming a cylindrical test piece by using asphalt mixtures with different aging degrees according to a test method of road engineering asphalt and asphalt mixture test specification (JTG E20-2011) T0702;
(6) carrying out low-temperature bending test on the asphalt mixture according to test method of road engineering asphalt and asphalt mixture test procedure (JTG E20-2011) T0716, and measuring the splitting tensile strength R of the cylindrical test pieces with different aging degreesTiAnd breaking tensile strain εTi；
The specific values are as follows:
| ni/％ | 0 | 10 | 20 | 30 | 40 | 50 | 60 | 70 | 80 | 90 | 100 |
| εTi | 15208 | 13986 | 12604 | 11215 | 9987 | 9390 | 9096 | 8801 | 8650 | 8505 | 8358 |
| RTi/MPa | 4.738 | 4.193 | 3.674 | 3.135 | 2.655 | 2.232 | 2.094 | 1.913 | 1.751 | 1.668 | 1.609 |
(7) adding n of aged asphaltiAs abscissa, breaking tensile strain εTiPlotting the ordinate, and adding an exponential function trend line, a formula and an error value, wherein the result is shown in FIG. 2;
as can be seen from FIG. 2, when the addition amount is 50%, the decreasing tendency of breaking tensile strain becomes gentle, unlike the addition amount of < 50%. Thus, selectingn650% is the inflection point.
(8) Calculating an aging parameter;
the specific calculation table is as follows:
| nk | εTk | RTk/MPa | ΔεT | ΔRT | A |
| 50％ | 9096 | 2.094 | 20.64 | 0.0125 | 18.74 |
specifically, the calculation table of the aging parameter B is as follows:
| A | ΔPI | ΔDF | ΔSP | B |
| 18.74 | 0.42 | 0.89 | 0.07 | 10.18 |
example 2
The embodiment discloses the application of a method for measuring the aging parameters of asphalt;
specifically, two kinds of asphalt, which are numbered AS1 and AS2, are aged according to a test method of road engineering asphalt and asphalt mixture test specification (JTG E20-2011) T0610, then ductility and penetration ratio tests are carried out, and a sample with the same gradation and oilstone ratio AS those in example 1 is adopted to carry out a low-temperature bending test according to a test method of road engineering asphalt and asphalt mixture test specification (JTG E20-2011) T0716, so that the splitting tensile strength and the breaking tensile strain are obtained; the following table specifically shows:
according to the traditional indexes, the residual ductility, the penetration ratio and the softening point of the AS2 asphalt are all larger than the relevant indexes of the AS1 asphalt. It can be concluded that: the AS2 asphalt has better ageing resistance. AS1 asphalt and AS2 asphalt did not differ significantly with respect to low temperature crack resistance.
The results of the measurements carried out according to the method of example 1 of the invention are given in the following table:
AS can be seen from the table, the AS1 asphalt has an aging parameter B of 2.2, which is less than 5.67 for AS2 asphalt; thus, aging has a weaker effect on the properties of AS1 asphalt. Therefore, AS1 asphalt was selected AS the asphalt for construction.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (10)
1. A method for measuring asphalt aging parameters is characterized by comprising the following steps:
(1) taking production asphalt, and determining penetration PI of the production asphaltbDuctility DFbAnd softening point SPb；
(2) Aging the production asphalt to obtain aged asphalt, and measuring the penetration PI of the aged asphaltaDuctility DFaAnd softening point SPa；
(3) Adding different amounts of aged asphalt into the production asphalt to obtain a plurality of groups of mixed asphalt; wherein, in the mixed asphalt of the i group, the addition amount of the aged asphalt is ni；
(4) Mixing the mixed asphalt with aggregate and filler according to a preset proportion to obtain a plurality of groups of asphalt mixtures;
(5) preparing the asphalt mixture into a cylindrical test piece;
(6) the determination of the tensile strength at break R of the cylindrical test piece was carried out according to the method in T0716 in JTG E20-2011TiAnd breaking tensile strain εTi；
(7) Constructing a curve with an inflection point by using the breaking tensile strain under the condition of different addition amounts of aged asphalt, and taking an asphalt addition value n closest to the inflection pointkSplitting tensile strength value RTkAnd a value of tensile strain to failure ∈Tk；
(8) The aging parameters of the production asphalt are calculated according to the following formula group:
B＝0.5A+0.3expΔPI+0.1expΔDF+0.1expΔSP
A＝ΔεT+lgΔRT
wherein B is an aging parameter of the production asphalt, Delta PI is a change rate of penetration before and after aging, Delta DF is a change rate of ductility before and after aging, Delta SP is a change rate of a softening point before and after aging, and A is an aging index of the production asphalt;
△εTfor breaking the rate of change of tensile strain in the general descending phase, εTtThe breaking tensile strain of the cylindrical test piece is determined when the addition amount of the aged asphalt in the mixed asphalt is 100%;
△RTthe rate of change of the tensile strength of the cleavage in the normal reduction stage, RTtWhen the addition amount of the aged asphalt in the mixed asphalt is 100%, the splitting tensile strength of the cylindrical test piece is high.
2. The method for determining asphalt aging parameters according to claim 1, wherein in steps (1) and (2), the penetration is determined according to the method of T0604 in JTG E20-2011, the ductility is determined according to the method of T0605, and the softening point is determined according to the method of T0606.
3. The method for measuring the asphalt aging parameter as claimed in claim 1, wherein in the step (2), the production asphalt is spread into a film with the thickness of 2-5 mm, and then aging is carried out at 150-180 ℃ and under normal pressure for 0.5-5 h; or
Paving the production asphalt into a film with the thickness of 2-5 mm, and then aging at 80-110 ℃ under the pressure of 2-2.5 MPa for 18-28 h.
4. The method for determining asphalt aging parameters according to claim 1 or 3, wherein in step (2), the process asphalt is aged according to the method of T0610 in JTG E20-2011.
5. The method for measuring asphalt aging parameters according to claim 1, wherein in the step (3), the addition amount of the aged asphalt is different among different groups of the mixed asphalt; the addition amount of the aged asphalt is in an increasing trend.
6. The method for determining asphalt aging parameters according to claim 1 or 5, wherein in the step (3), the n isiThe values of (A) are 0%, 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90% and 100% in sequence.
7. The method for determining asphalt aging parameters according to claim 1, wherein the production asphalt is SBS modified asphalt.
8. The method for measuring the asphalt aging parameter as set forth in claim 1, wherein in the step (4), the asphalt mixture mainly comprises the following raw materials in parts by weight:
2-5 parts of mixed asphalt, 90-98 parts of aggregate and 0-5 parts of filler.
9. The method for measuring the asphalt aging parameter as set forth in claim 1, wherein the asphalt mixture is a cold-mix asphalt mixture or a hot-mix asphalt mixture.
10. The method for measuring asphalt aging parameters according to claim 1, wherein in step (5), a cylindrical test piece is prepared according to the method in T0702 in JTG E20-2011.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010919512.3A CN112213475B (en) | 2020-09-04 | 2020-09-04 | Method for measuring asphalt aging parameters |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010919512.3A CN112213475B (en) | 2020-09-04 | 2020-09-04 | Method for measuring asphalt aging parameters |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112213475A CN112213475A (en) | 2021-01-12 |
| CN112213475B true CN112213475B (en) | 2022-04-29 |
Family
ID=74050600
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010919512.3A Active CN112213475B (en) | 2020-09-04 | 2020-09-04 | Method for measuring asphalt aging parameters |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112213475B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113092744A (en) * | 2021-02-26 | 2021-07-09 | 江苏天诺道路材料科技有限公司 | Long-term anti-aging performance detection method for asphalt |
| CN114200113B (en) * | 2021-11-15 | 2024-02-09 | 广东交通职业技术学院 | Method for determining rock asphalt blending proportion |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102735824A (en) * | 2012-06-20 | 2012-10-17 | 江苏山水建设集团有限公司 | Asphalt mixture aging test method |
| CN111548057A (en) * | 2020-06-08 | 2020-08-18 | 四川省公路规划勘察设计研究院有限公司 | Mix proportion design method of plant-mixed hot recycled asphalt mixture |
-
2020
- 2020-09-04 CN CN202010919512.3A patent/CN112213475B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102735824A (en) * | 2012-06-20 | 2012-10-17 | 江苏山水建设集团有限公司 | Asphalt mixture aging test method |
| CN111548057A (en) * | 2020-06-08 | 2020-08-18 | 四川省公路规划勘察设计研究院有限公司 | Mix proportion design method of plant-mixed hot recycled asphalt mixture |
Non-Patent Citations (3)
| Title |
|---|
| 回收沥青材料性能及再生新沥青掺量试验研究;王振龙;《石油沥青》;20161031;第30卷(第5期);第17-31页 * |
| 基于材料复合理论的老化沥青再生规律;马涛等;《东南大学学报》;20080531;第38卷(第3期);第520-524页 * |
| 玄武岩纤维沥青混合料目标配合比设计及老化性能研究;于雪松;《中国优秀博硕士学位论文全文数据库(硕士)工程科技Ⅱ辑》;20121015(第10期);第C034-90页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112213475A (en) | 2021-01-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Airey et al. | Linear rheological behavior of bituminous paving materials | |
| CN112213475B (en) | Method for measuring asphalt aging parameters | |
| Liu et al. | Evaluation of polyphosphoric acid on the performance of polymer modified asphalt binders | |
| Newman | Dynamic shear rheological properties of polymer-modified asphalt binders | |
| CN112213474B (en) | Method for measuring asphalt aging coefficient | |
| CN112213473B (en) | Method for measuring asphalt aging index | |
| Lv et al. | Comparison and relationship between indices for the characterization of the moisture resistance of asphalt–aggregate systems | |
| Qasim et al. | Evaluation of Mixing and Compaction Temperatures (MCT) for modified asphalt binders using zero shear viscosity and Cross-Williamson model | |
| Kumandaş et al. | Effect of WCO addition on high and low-temperature performance of RET modified bitumen | |
| Liu et al. | Laboratory testing on the anti-aging performance of amorphous poly alpha olefin (APAO) modified asphalt binders | |
| EP2443199A1 (en) | Reclaimed asphalt pavement containing polyphosphoric acid modified binder | |
| Mirzaiyan et al. | Investigating the influence of SBS and Gilsonite on the rheological properties of asphalt binder using statistical analysis | |
| Wang et al. | Laboratory evaluation of the properties of high-cured crumb rubber modified asphalt containing sulfur and polymer after the oxidative aging procedure | |
| CN112213476B (en) | Method for measuring asphalt aging degree | |
| EP3208288A1 (en) | Process for preparing a polymerized cashew nut shell liquid and its use for the preparation of a bitumen composition | |
| Dong et al. | Laboratory investigations of the effects of asphalt mortar and its viscoelasticity on the workability of asphalt mixtures | |
| Xiao et al. | Evaluating asphalt mix ingredients by moisture susceptibility: The development of a new modified boiling test procedure based on digital imaging | |
| Holleran et al. | Effect of bio-rejuvenator on recycled porous asphalt mixes | |
| Hemanth Kumar et al. | Investigation of aging effect on asphalt binders using thin film and rolling thin film oven test | |
| Lu et al. | Fatigue and healing characteristics of bitumens studied using dynamic shear rheometer | |
| CN110988314A (en) | SBS modified asphalt functionalization effect evaluation method based on viscous flow activation energy | |
| Zhu et al. | Compounding optimization of SBS-SBR high-viscosity modifier and rejuvenation of aged SBS-SBR modified asphalt | |
| Oner | Rheological characteristics of bitumens prepared with process oil | |
| Cao et al. | Laboratory evaluation of performances of asphalt rubber and gap graded mixtures | |
| CN114200113B (en) | Method for determining rock asphalt blending proportion |
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 |