CN112557291A - Asphalt anti-aging performance characterization method based on bending beam creep test - Google Patents
Asphalt anti-aging performance characterization method based on bending beam creep test Download PDFInfo
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- CN112557291A CN112557291A CN202011366962.0A CN202011366962A CN112557291A CN 112557291 A CN112557291 A CN 112557291A CN 202011366962 A CN202011366962 A CN 202011366962A CN 112557291 A CN112557291 A CN 112557291A
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- 239000010426 asphalt Substances 0.000 title claims abstract description 92
- 238000012360 testing method Methods 0.000 title claims abstract description 36
- 230000003712 anti-aging effect Effects 0.000 title claims abstract description 32
- 238000005452 bending Methods 0.000 title claims abstract description 29
- 238000012512 characterization method Methods 0.000 title claims abstract description 11
- 230000032683 aging Effects 0.000 claims abstract description 41
- 230000007774 longterm Effects 0.000 claims abstract description 19
- 238000004088 simulation Methods 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims description 10
- 239000010779 crude oil Substances 0.000 description 13
- 239000003921 oil Substances 0.000 description 9
- 239000000463 material Substances 0.000 description 5
- 238000002156 mixing Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 230000008929 regeneration Effects 0.000 description 4
- 238000011069 regeneration method Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 201000010099 disease Diseases 0.000 description 2
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 2
- 238000004821 distillation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000005504 petroleum refining Methods 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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- 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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
-
- 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
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- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Physics & Mathematics (AREA)
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- General Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
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- Environmental & Geological Engineering (AREA)
- Biodiversity & Conservation Biology (AREA)
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses an asphalt anti-aging performance characterization method based on a bending beam creep test. When the ratio of the S value of the creep stiffness detected by the bending beam rheometer after the long-term aging simulation of the asphalt sample in a laboratory to the S value of the original asphalt is more than 1.5, the anti-aging performance of the asphalt sample is considered to be poor, when the ratio of the S value of the creep stiffness detected by the bending beam rheometer after the long-term aging simulation of the asphalt sample in the laboratory to the S value of the original asphalt is 1.2-1.5, the anti-aging performance of the asphalt sample is considered to be good, and when the ratio of the S value of the creep stiffness detected by the bending beam rheometer after the long-term aging simulation of the asphalt sample in the laboratory to the S value of the original asphalt is less than 1.2, the anti-aging performance.
Description
Technical Field
The invention relates to the fields of petroleum refining and chemical industry and the traffic field of petroleum asphalt material application, in particular to an asphalt anti-aging performance characterization method based on a bending beam creep test.
Background
In China, the phenomena of common early diseases such as cracks and the like and short service life of an asphalt pavement constructed in an early stage exist, the reasons are the same, and besides the construction design and quality control reasons, the aging of asphalt materials in the mixing, paving and using processes is an important factor influencing the pavement performance and service life. Asphalt aging refers to that after the asphalt product is produced by crude oil distillation, in the processes of mixing, paving and using, under the influence of factors such as heat, oxygen, illumination and the like, physicochemical actions such as oxidation, decomposition, polymerization, light component volatilization and the like occur, so that the component composition, the micro molecular structure and the like of the asphalt product are changed, and the change of the macroscopic physical and rheological properties of the asphalt is externally shown. The penetration degree of the asphalt is reduced, the viscosity is increased, the viscosity toughness is reduced, the elasticity is increased, and the low-temperature fatigue resistance is reduced in the early aging stage. As the asphalt ages to the later stage, the asphalt becomes hard and brittle, so that a large number of cracks and other diseases are generated on the asphalt pavement, and the pavement is damaged.
According to statistics, the national highway maintenance mileage reaches 495 kilometers by 2019, the proportion of the national highway maintenance mileage accounts for 98.8 percent of the total highway mileage, and the recycled asphalt pavement material produced each year exceeds 300 million tons and is increased at a higher speed. The maximum proportion of the recycled asphalt pavement materials is recycled, and the method is an effective way for realizing the resource utilization of solid wastes. The regeneration is the inverse process of aging, the aging information of the materials in the asphalt pavement can provide important basis for judging the regeneration time of the asphalt pavement, the judgment of the asphalt aging information in the asphalt pavement at present mainly comprises the steps of pavement sampling, asphalt extraction, sample detection and the like, the process is long, the procedure is complicated, no specific characterization method for the good and bad aging resistance of the asphalt exists, and technical support cannot be provided for the regeneration of the asphalt pavement.
Disclosure of Invention
Based on the technical problems, the invention provides a bending beam creep test-based asphalt anti-aging performance characterization method, which provides a basis for the quality of the anti-aging performance of an asphalt product and provides technical support for the regeneration of an asphalt pavement.
The technical characteristics are as follows:
1. a method for representing the anti-aging performance of asphalt based on a bending beam creep test is characterized by comprising the following steps: the anti-aging performance of the asphalt is evaluated by adopting the ratio of the creep stiffness S value detected by a bending beam rheometer after long-term aging simulated by a laboratory to the original asphalt S value.
2. The asphalt anti-aging performance characterization method based on the bending beam creep test as claimed in claim 1, wherein: the laboratory simulation long-term aging test is a pressure aging test of samples aged by a rotary film oven.
3. The rotary film oven burn-in test and the pressure burn-in test of claim 2, wherein: the aging test temperature of the rotary film oven is 163 +/-0.5 ℃, the aging time is 85 minutes, and the air flow is 4000ml/min +/-200 ml/min; the pressure aging test temperature is 100 plus or minus 0.5 ℃, the aging time is 20 hours plus or minus 10 minutes, and the pressure is 2.1 plus or minus 0.1 MPa.
4. The method for characterizing the anti-aging performance of asphalt based on the creep test of a bending beam as claimed in claim 1, wherein the testing temperature is-12 ± 0.1 ℃, and the corresponding creep stiffness modulus is recorded at 60s and is expressed in MPa.
5. The asphalt anti-aging performance characterization method based on the bending beam creep test as claimed in claim 1, wherein: when the ratio of the S value of the creep stiffness detected by the bending beam rheometer after the long-term aging simulation of the asphalt sample in a laboratory to the S value of the original asphalt is more than 1.5, the anti-aging performance of the asphalt sample is considered to be poor, when the ratio of the S value of the creep stiffness detected by the bending beam rheometer after the long-term aging simulation of the asphalt sample in the laboratory to the S value of the original asphalt is 1.2-1.5, the anti-aging performance of the asphalt sample is considered to be good, and when the ratio of the S value of the creep stiffness detected by the bending beam rheometer after the long-term aging simulation of the asphalt sample in the laboratory to the S value of the original asphalt is less than 1.2, the anti-aging performance.
Detailed Description
The present invention is further illustrated by the following examples, which are intended to be purely exemplary and are not intended to limit the scope of the invention, as various equivalent modifications of the invention will become apparent to those skilled in the art after reading the present invention, and fall within the scope of the appended claims.
The invention discloses an asphalt anti-aging performance characterization method based on a bending beam creep test. When the ratio of the S value of the creep stiffness detected by the bending beam rheometer after the long-term aging simulation of the asphalt sample in a laboratory to the S value of the original asphalt is more than 1.5, the anti-aging performance of the asphalt sample is considered to be poor, when the ratio of the S value of the creep stiffness detected by the bending beam rheometer after the long-term aging simulation of the asphalt sample in the laboratory to the S value of the original asphalt is 1.2-1.5, the anti-aging performance of the asphalt sample is considered to be good, and when the ratio of the S value of the creep stiffness detected by the bending beam rheometer after the long-term aging simulation of the asphalt sample in the laboratory to the S value of the original asphalt is less than 1.2, the anti-aging performance.
The invention is further illustrated by the following specific examples:
examples
(1) Sample preparation
Aging the asphalt sample according to a T0610 asphalt rotating film heating test in JTG E20-2011 highway engineering asphalt and asphalt mixture test procedures to obtain a short-term aging sample;
and aging the short-term aging sample according to a T0630 pressure aging container accelerated asphalt aging test in the JTG E20-2011 highway engineering asphalt and asphalt mixture test procedure to obtain a long-term aging sample.
(2) Sample detection
And testing the original sample and the long-term aged sample of the asphalt sample according to a T0627 asphalt bending creep stiffness test in the test specification of JTG E20-2011 road engineering asphalt and asphalt mixture, wherein the testing temperature is-12 ℃, and the S values of the long-term aged sample and the original sample are obtained.
The invention tests the S values of 10 different oil sources before and after the matrix asphalt is aged, the related information of the asphalt is as follows, and the detection results are shown in a table-1:
according to the variety of oil sources for producing asphalt, the different asphalt production processes and different penetration grades, typical asphalt samples with representativeness and different anti-aging performances are selected, and 10 kinds of asphalt are selected and marked as follows: a70, B70, C70, D70, E70, F70, G70, H70, I70 and J70, the crude oil for producing the asphalt comprises the following typical crude oils suitable for producing the asphalt at home and abroad: boskan crude oil, marui crude oil, nine-region thick oil, jeiche thick oil of Liaohe, Bohai sea D7036-1 crude oil, Saite medium crude oil, Kewiter crude oil, Venezuela oil and the like; the process for producing asphalt comprises: distillation, solvent, oxidation and blending. Wherein A70 originates from: nine areas of thick oil; b70 sources: saute medium crude oil; c70 sources: a kowitt crude oil; d70 sources: crude oil of Bohai sea; source of E70: thick oil of Happy Ling of Liaohe; sources of F70: saudi medium oil; sources of G70: nine areas of thick oil; h70: crude oil of Mary; sources of I70, J70: mixing Marie and Boscan crude oil.
TABLE-1 test results
As can be seen from Table-1, the excellent anti-aging properties are: e70, F70 and I70; the good anti-aging performance is as follows: c70, D70 and H70; poor aging resistance is: a70, B70, G70 and J70.
Claims (5)
1. A method for representing the anti-aging performance of asphalt based on a bending beam creep test is characterized by comprising the following steps: the anti-aging performance of the asphalt is evaluated by adopting the ratio of the creep stiffness S value detected by a bending beam rheometer after long-term aging simulated by a laboratory to the original asphalt S value.
2. The asphalt anti-aging performance characterization method based on the bending beam creep test as claimed in claim 1, wherein: the laboratory simulation long-term aging test is a pressure aging test of samples aged by a rotary film oven.
3. The rotary film oven burn-in test and the pressure burn-in test of claim 2, wherein: the aging test temperature of the rotary film oven is 163 +/-0.5 ℃, the aging time is 85 minutes, and the air flow is 4000mL/min +/-200 mL/min; the pressure aging test temperature is 100 plus or minus 0.5 ℃, the aging time is 20 hours plus or minus 10 minutes, and the pressure is 2.1 plus or minus 0.1 MPa.
4. The method for characterizing the anti-aging performance of asphalt based on the creep test of a bending beam as claimed in claim 1, wherein the testing temperature is-12 ± 0.1 ℃, and the corresponding creep stiffness modulus is recorded at 60s and is expressed in MPa.
5. The asphalt anti-aging performance characterization method based on the bending beam creep test as claimed in claim 1, wherein: when the ratio of the S value of the creep stiffness detected by the bending beam rheometer after the long-term aging simulation of the asphalt sample in a laboratory to the S value of the original asphalt is more than 1.5, the anti-aging performance of the asphalt sample is considered to be poor, when the ratio of the S value of the creep stiffness detected by the bending beam rheometer after the long-term aging simulation of the asphalt sample in the laboratory to the S value of the original asphalt is 1.2-1.5, the anti-aging performance of the asphalt sample is considered to be good, and when the ratio of the S value of the creep stiffness detected by the bending beam rheometer after the long-term aging simulation of the asphalt sample in the laboratory to the S value of the original asphalt is less than 1.2, the anti-aging performance.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011366962.0A CN112557291A (en) | 2020-11-27 | 2020-11-27 | Asphalt anti-aging performance characterization method based on bending beam creep test |
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| CN202011366962.0A CN112557291A (en) | 2020-11-27 | 2020-11-27 | Asphalt anti-aging performance characterization method based on bending beam creep test |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113237826A (en) * | 2021-06-17 | 2021-08-10 | 长沙理工大学 | Method for evaluating equivalent mechanism of accelerated aging and natural aging of SBS (styrene butadiene styrene) modified asphalt |
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 |
| CN106908327A (en) * | 2017-01-20 | 2017-06-30 | 同济大学 | A kind of cryogenic property method of testing of ultraviolet light and aging pitch and asphalt mastic |
-
2020
- 2020-11-27 CN CN202011366962.0A patent/CN112557291A/en active Pending
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 |
| CN106908327A (en) * | 2017-01-20 | 2017-06-30 | 同济大学 | A kind of cryogenic property method of testing of ultraviolet light and aging pitch and asphalt mastic |
Non-Patent Citations (1)
| Title |
|---|
| 朱海: "纳米SiO2/橡胶粉复配改性沥青抗老化性能研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》, pages 8 - 24 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113237826A (en) * | 2021-06-17 | 2021-08-10 | 长沙理工大学 | Method for evaluating equivalent mechanism of accelerated aging and natural aging of SBS (styrene butadiene styrene) modified asphalt |
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