CN108195693A - A kind of evaluation method of low temperature performance of asphalt - Google Patents
A kind of evaluation method of low temperature performance of asphalt Download PDFInfo
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- CN108195693A CN108195693A CN201711312013.2A CN201711312013A CN108195693A CN 108195693 A CN108195693 A CN 108195693A CN 201711312013 A CN201711312013 A CN 201711312013A CN 108195693 A CN108195693 A CN 108195693A
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- test specimen
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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
- G01N3/20—Investigating strength properties of solid materials by application of mechanical stress by applying steady bending forces
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- 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
- G01N1/42—Low-temperature sample treatment, e.g. cryofixation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/006—Crack, flaws, fracture or rupture
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention belongs to Highway Test technical fields, are related to a kind of evaluation method of low temperature performance of asphalt.Its step are as follows：Plate block test specimen is made, room temperature demoulds after conserving 24~48h；Test specimen is placed in 60 ± 1 DEG C of thermostatic chamber, keeps the temperature 12h；It takes out test specimen and carries out vacuum saturated test, after 15min is kept under the conditions of vacuum degree is 97.3kPa, 30min is placed in immersion under normal pressure；Test specimen taking-up with polybag is bandaged, is immediately placed in 16h in 18 ± 1 DEG C of refrigerating chambers；Test specimen is taken out, cuts into prism girder；Prism girder is placed into 1h in 10 ± 0.5 DEG C of constant temperature anti-icing fluid；It takes out girder and carries out bend test, maximum flexural-tensile strain μ ε when being destroyed in universal testing machine.Compared with prior art, easy to operate, favorable repeatability of the invention, can accurate its cryogenic property of thoroughly evaluating using existing equipment.
Description
Technical field
The invention belongs to Highway Test technical field, it particularly relates to arrive a kind of low temperature performance of asphalt
Evaluation method.
Background technology
With the fast development of China's transport development, the proportion of bituminous paving is more and more.The newly-built bituminous highway in part
In design and construction, high temperature, low temperature and the anti-water damage property of each face layer asphalt are all met the requirements, however are being designed
Pavement disease will occur in the length of service, especially northern China severe cold area winter pavement cracking easily occurs the phenomenon that.
China mainly evaluates its cryogenic property, experiment master by T 0715-2011 asphalts bend tests at present
Load is applied at -10 DEG C to the girder that rolling molding rut test piece in laboratory is cut, be destroyed flexural-tensile strain.It should
Method can only evaluate the new bending failure mechanical property for mixing and stirring asphalt, after the road pavement military service several years, can not pass through
The performance of Pavement Low cracking resistance under the integrated conditions such as summer high temperature, rain drop erosion, winter cold carries out thoroughly evaluating.
Invention content
In order to solve the above technical problems, the present invention provides a kind of evaluation method of low temperature performance of asphalt, the party
Method is easy to operate, favorable repeatability, can accurate its cryogenic property of thoroughly evaluating using existing equipment.
A kind of evaluation method of low temperature performance of asphalt of the present invention, the evaluation method specific steps are such as
Under：1) the plate block test specimen of 300 × 300 × 50mm is made of rolling molding machine simulation pavement compaction forming process, room temperature is supported
It is demoulded after 24~48h of shield；2) test specimen is placed in the thermostatic chamber for having reached 60 ± 1 DEG C, keeps the temperature 12h；3) test specimen is taken out to carry out very
Empty saturated test, after 15min is kept under the conditions of vacuum degree is 97.3~98.7kPa, 30min is placed in immersion under normal pressure；4)
Test specimen taking-up with polybag is bandaged, is immediately placed in 16h in -18 ± 1 DEG C of refrigerating chamber；5) test specimen is taken out, using cutting machine-cut
The prism girder of long 250 ± 2mm, wide 30 ± 2mm, high 35 ± 2mm is made；6) by perseverance of the prism girder at -10 ± 0.5 DEG C
1h is placed in warm anti-icing fluid；7) it takes out girder and carries out bend test in universal testing machine, maximum curved drawing should when being destroyed
Become μ ε.
Compared with prior art, the evaluation method of low temperature performance of asphalt of the present invention considers asphalt road
The performance of asphalt cracking resistance of the face after the weather conditions such as high temperature, low temperature, sleet cold cycling, can be with effective evaluation road
Cryogenic property of the face after the several years of being on active service；Using maximum flexural-tensile strain μ ε when test specimen measures destruction after this method conserves as
Evaluation index, value is bigger, shows that the low temperature performance of asphalt is better；This method is easy to operate, favorable repeatability, utilizes
Existing equipment can accurate its cryogenic property of thoroughly evaluating, be winter severe cold area and cold area bituminous paving design and material selection
Provide effectively evaluating method.
Specific embodiment
The evaluation method of low temperature performance of asphalt of the present invention is made furtherly with reference to specific embodiment
It is bright, but protection scope of the present invention is not limited to this.
Embodiment 1
The project profile of the present embodiment is：Certain winter severe cold area asphalt pavement of highway upper layer SBS modified pitch Black Warrior
Rock AC-13 Asphalt Mixture Designs, existing tri- kinds of brand SBS modified pitch selections of A, B, C, using this evaluation method and JTG
T 0715 is tested respectively in E20-2011.This evaluation method is tested according to the following steps：
1) the plate block test specimen of 300 × 300 × 50mm, room are made of rolling molding machine simulation pavement compaction forming process
It is demoulded after temperature maintenance 48h, three kinds of brand SBS modified pitch are denoted as test specimen A, B, C respectively；
2) test specimen is placed in the thermostatic chamber for having reached 60 ± 1 DEG C, keeps the temperature 12h；
3) it takes out test specimen and carries out vacuum saturated test, after 15min is kept under the conditions of vacuum degree is 97.3~98.7kPa,
30min is placed in immersion under normal pressure；
4) test specimen taking-up with polybag is bandaged, is immediately placed in 16h in -18 ± 1 DEG C of refrigerating chamber；
5) test specimen is taken out, is utilized respectively the prism of 250 ± 2mm of cutting machine cutting growth, wide 30 ± 2mm, high 35 ± 2mm
Girder；
6) prism girder is placed into 1h in -10 ± 0.5 DEG C of constant temperature anti-icing fluid；
7) take out girder, A, B, C test specimen are cut girder respectively universal testing machine carry out bend test, broken
Maximum flexural-tensile strain μ ε when bad.Result of the test is shown in Table 1.
1 difference SBS modified asphalt mixture maximum flexural-tensile strain μ ε of table
From 1 result of the test of table it is found that tri- kinds of brand SBS modified pitch of A, B, C carry out the low temperature properties of asphalt respectively
It can evaluate, according to JTG E20-2011《Highway engineering pitch and Asphalt Mixture Experiment regulation》Middle T0715 methods are tested,
Maximum flexural-tensile strain is satisfied by the regulation not less than 2600 μ ε, and brand A performances when three kinds of brand modified asphalt mixtures destroy
It is optimal；And according to this test method, when brand A is destroyed maximum flexural-tensile strain only have 1816 μ ε, far below brand B and C, and brand
C performances are better than brand B.
In conclusion showing that C brand SBS modified pitch basalt AC-13 performance of asphalt mixture is optimal, cryogenic property was both
Meet and newly mix and stir asphalt, and meet the durability after being on active service for many years, it is proposed that SBS modified pitch Design and procurement selects brand
C。
Embodiment 2
The project profile of the present embodiment is：Floor anti-rut agent modified pitch stone in face in certain cold area asphalt pavement of highway
Limestone AC-20 Asphalt Mixture Designs, existing tri- kinds of brand anti-rut agent selections of A, B, C, using this evaluation method and JTG
T 0715 is tested respectively in E20-2011.This evaluation method is tested according to the following steps：
1) the fast test specimen of plate of 300 × 300 × 50mm, room are made of rolling molding machine simulation pavement compaction forming process
It is demoulded after temperature maintenance 48h, three kinds of brand anti-rut agents are denoted as test specimen A, B, C respectively；
2) test specimen is placed in the thermostatic chamber for having reached 60 ± 1 DEG C, keeps the temperature 12h；
3) it takes out test specimen and carries out vacuum saturated test, after 15min is kept under the conditions of vacuum degree is 97.3~98.7kPa,
30min is placed in immersion under normal pressure；
4) test specimen taking-up with polybag is bandaged, is immediately placed in 16h in -18 ± 1 DEG C of refrigerating chamber；
5) test specimen is taken out, is utilized respectively the prism of 250 ± 2mm of cutting machine cutting growth, wide 30 ± 2mm, high 35 ± 2mm
Girder；
6) prism girder is placed into 1h in -10 ± 0.5 DEG C of constant temperature anti-icing fluid；
7) take out girder, A, B, C test specimen are cut girder respectively universal testing machine carry out bend test, broken
Maximum flexural-tensile strain μ ε when bad.Result of the test is shown in Table 1.
2 difference anti-rut agent asphalt maximum flexural-tensile strain μ ε of table
From 1 result of the test of table it is found that the cryogenic property that tri- kinds of brand anti-rut agents of A, B, C carry out asphalt respectively is commented
Valency, according to JTG E20-2011《Highway engineering pitch and Asphalt Mixture Experiment regulation》Middle 0715 methods of T are tested, and three
Maximum flexural-tensile strain is satisfied by the regulation not less than 2300 μ ε, and brand C when kind brand anti-rut agent asphalt destroys
It can be optimal；And according to this test method, maximum flexural-tensile strain is 1978 μ ε when brand C is destroyed, and maximum curved drawing should when brand B is destroyed
Become and only have 1684 μ ε, maximum flexural-tensile strain is 2309 μ ε when brand A is destroyed, still above 2300 μ ε, function admirable.
In conclusion showing that brand A anti-rut agent limestone AC-20 performance of asphalt mixture is optimal, cryogenic property was both full
Foot newly mixes and stirs asphalt, and meets the durability after being on active service for many years, it is proposed that anti-rut agent Design and procurement selects brand A.
Claims (1)
1. a kind of evaluation method of low temperature performance of asphalt, which is characterized in that the evaluation method is as follows：
1) the plate block test specimen of 300 × 300 × 50mm is made of rolling molding machine simulation pavement compaction forming process, room temperature is supported
It is demoulded after 24~48h of shield；
2) test specimen is placed in the thermostatic chamber for having reached 60 ± 1 DEG C, keeps the temperature 12h；
3) it takes out test specimen and carries out vacuum saturated test, after 15min is kept under the conditions of vacuum degree is 97.3~98.7kPa, normal
30min is placed in pressure immersion；
4) test specimen taking-up with polybag is bandaged, is immediately placed in 16h in -18 ± 1 DEG C of refrigerating chamber；
5) test specimen is taken out, the prism girder of grow up using cutting machine cutting 250 ± 2mm, wide 30 ± 2mm, high 35 ± 2mm；
6) prism girder is placed into 1h in -10 ± 0.5 DEG C of constant temperature anti-icing fluid；
7) it takes out girder and carries out bend test, maximum flexural-tensile strain μ ε when being destroyed in universal testing machine.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711312013.2A CN108195693A (en) | 2017-12-11 | 2017-12-11 | A kind of evaluation method of low temperature performance of asphalt |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711312013.2A CN108195693A (en) | 2017-12-11 | 2017-12-11 | A kind of evaluation method of low temperature performance of asphalt |
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| CN108195693A true CN108195693A (en) | 2018-06-22 |
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| CN201711312013.2A Pending CN108195693A (en) | 2017-12-11 | 2017-12-11 | A kind of evaluation method of low temperature performance of asphalt |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108204933A (en) * | 2017-12-11 | 2018-06-26 | 山西省交通科学研究院 | A kind of anti-rut agent and the evaluation method of building stones adhesiveness |
| CN113138108A (en) * | 2021-04-22 | 2021-07-20 | 山东京博石油化工有限公司 | Mold and method for detecting low-temperature flexibility of waterproof asphalt |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104048886A (en) * | 2014-06-26 | 2014-09-17 | 东南大学 | Freezing and thawing cycle fatigue testing method of asphalt mixture in permafrost region |
| CN204491358U (en) * | 2015-03-29 | 2015-07-22 | 郭伟 | A kind of asphalt pavement structure with automatic snow melting function |
| CN106323762A (en) * | 2016-08-25 | 2017-01-11 | 长安大学 | Detection method for freeze-thaw resistance properties of bituminous mortar |
| CN206479480U (en) * | 2017-02-26 | 2017-09-08 | 中国科学院寒区旱区环境与工程研究所 | The soil body has the automatic supply and discharge water installations of pressure freezing-thawing test |
-
2017
- 2017-12-11 CN CN201711312013.2A patent/CN108195693A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104048886A (en) * | 2014-06-26 | 2014-09-17 | 东南大学 | Freezing and thawing cycle fatigue testing method of asphalt mixture in permafrost region |
| CN204491358U (en) * | 2015-03-29 | 2015-07-22 | 郭伟 | A kind of asphalt pavement structure with automatic snow melting function |
| CN106323762A (en) * | 2016-08-25 | 2017-01-11 | 长安大学 | Detection method for freeze-thaw resistance properties of bituminous mortar |
| CN206479480U (en) * | 2017-02-26 | 2017-09-08 | 中国科学院寒区旱区环境与工程研究所 | The soil body has the automatic supply and discharge water installations of pressure freezing-thawing test |
Non-Patent Citations (3)
| Title |
|---|
| 刘志强: "《公路工程实验检测技术与标准规范应用实务手册 3》", 31 December 2003 * |
| 国家技术监督局: "《中华人民共和国国家标准 GB/T11973-1997》", 12 November 1997 * |
| 梁军 等: "《预拌混凝土生产企业试验员工作指南》", 30 June 2012 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108204933A (en) * | 2017-12-11 | 2018-06-26 | 山西省交通科学研究院 | A kind of anti-rut agent and the evaluation method of building stones adhesiveness |
| CN113138108A (en) * | 2021-04-22 | 2021-07-20 | 山东京博石油化工有限公司 | Mold and method for detecting low-temperature flexibility of waterproof asphalt |
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Application publication date: 20180622 |