CN105973928A - Method for rapid evaluation of storage stability of modified asphalt - Google Patents
Method for rapid evaluation of storage stability of modified asphalt Download PDFInfo
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- CN105973928A CN105973928A CN201610382253.9A CN201610382253A CN105973928A CN 105973928 A CN105973928 A CN 105973928A CN 201610382253 A CN201610382253 A CN 201610382253A CN 105973928 A CN105973928 A CN 105973928A
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- storage stability
- modified pitch
- modified asphalt
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- test tube
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/18—Investigating or analyzing materials by the use of thermal means by investigating thermal conductivity
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
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- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
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- Working-Up Tar And Pitch (AREA)
Abstract
The invention relates to a method for rapid evaluation of storage stability of modified asphalt. The method comprises the following steps that the modified asphalt in a hot melting state is taken and injected in a test tube, the test tube is put in an oven and kept for 48 h at the temperature of 163 DEG C, the test tube sample is cooled immediately after being taken out, then the asphalt is separated from the test tube, the modified asphalt is divided into three parts with equal length, the upper part and the bottom part of the modified asphalt are taken, a thermal constant analysis meter is used for measuring the thermal conduction coefficient and the thermal diffusion coefficient of the upper part and the bottom part of the modified asphalt, and when the difference ratio of the thermal conduction coefficients and the difference ratio of the thermal diffusion coefficients are both smaller than or equal to 5%, it is determined that the storage stability of the modified asphalt is qualified; when the difference ratio of the thermal conduction coefficients and the difference ratio of the thermal diffusion coefficients are both larger than 5%, it is determined that the storage stability of the modified asphalt is unqualified. The method is used for evaluating the storage stability of the modified asphalt, few instruments and equipment are needed, operation is easy, convenient and flexible, time is saved (the result of a test can be obtained only in 3 min), efforts are saved, and the result is visual, accurate and reliable.
Description
Technical field
The present invention relates to one and utilize that hot Physical Constants is quick, accurate evaluation various modified pitch stable storage
The method of property (i.e. the compatibility).
Background technology
Colophonium is a kind of important construction material, is mainly used in field of road construction.At present, in order to improve
The quality of Colophonium, extends the service life on road surface, uses high molecular polymer, inorganic material etc. to Colophonium
It is modified becoming one to be widely implemented and effective method.Due to high molecular polymer and Colophonium
Comparing performance difference relatively big, the two is difficult to dissolve each other, it is difficult to form stabilising system, the most static, major part
Polymer can float and form the polymer phase rich in polymer, and bottom is then for the Colophonium based on Colophonium
Phase.Same inorganic material is placed with asphalt material system, nano-material modified Colophonium and also be there will be layering for a long time
Phenomenon, i.e. storage stability are defective, affect the performance of modified pitch.Storage stability is underproof to be changed
Property Colophonium can not produce and construction in use.
Therefore, the storage stability evaluating modified pitch quickly and accurately is necessary.
Summary of the invention
The technical problem to be solved is for above-mentioned deficiency present in prior art, it is provided that
A kind of easy and simple to handle, it is possible to quickly, (hot physical property is normal for the method for accurate evaluation modified pitch storage stability
Number test method(s)).
For solving above-mentioned technical problem, present invention provide the technical scheme that
A kind of method providing Fast Evaluation modified pitch storage stability, step is as follows: take hot melt shape
In the modified pitch injecting tube of state, it is placed in baking oven and is incubated 48h in 163 DEG C, after taking out cuvette sample
Cool down immediately, then make Colophonium separate with test tube, and modified pitch is divided into three parts of equal length, take
Portion and bottom modified pitch measure the coefficient of heat conduction and thermal diffusion coefficient with thermal constant analyser respectively, work as heat
The coefficient of conductivity and thermal diffusion coefficient difference rate all≤5%, then judge that modified pitch storage stability is qualified；When
The coefficient of heat conduction and the equal ＞ of thermal diffusion coefficient difference rate 5%, then judge that modified pitch storage stability does not conforms to
Lattice.
By such scheme, a length of 20cm of described test tube, caliber is 25mm.
By such scheme, described modified pitch is polymer modified asphalt, mineral-modified Colophonium or receives
Rice material modification Colophonium.
The beneficial effects of the present invention is: compared with prior art, the method for the invention (hot physical property
Constant test method(s)) it is used for evaluating modified pitch storage stability (i.e. the compatibility), need instrument and equipment few,
And easy and simple to handle, flexible, save time (test only need 3min can go out result), laborsaving, result is straight
See, accurately and reliably；It addition, this method is applied widely, can be used for test polymer modified pitch, nothing
Machine thing modified pitch or the storage stability of nano-material modified Colophonium, solve existing test stable storage
Unicity problem present in property method.
Detailed description of the invention
For making those skilled in the art be more fully understood that technical scheme, below in conjunction with embodiment
The present invention is described in further detail.
Matrix pitch used by the embodiment of the present invention is Panjin 90# Colophonium, and SBS modified pitch is Panjin
90#SBS modified pitch.
Embodiment 1
With matrix pitch and 4% SBS (styrene butadiene styrene block copolymer (SBS)) at 180 DEG C
Mix 60 minutes by High shear device, prepare polymer modified asphalt A, with matrix pitch and 4%
The stabilizer of SBS (styrene butadiene styrene block copolymer (SBS)) and 0.5% is (containing curing two
Quinoline 35%, lead oxide 50%, white carbon black 15%), prepare polymer modified asphalt B, take hot melt state
In modified pitch injecting tube (a length of 20cm of test tube, caliber is 25mm), be placed in baking oven in
163 DEG C of insulation 48h, cool down immediately after taking out cuvette sample, then make Colophonium separate with test tube, and will change
Property Colophonium be divided into three parts of equal length, take top and bottom modified pitch measured with thermal constant analyser respectively
The coefficient of heat conduction and thermal diffusion coefficient, test the data obtained is shown in Table 1.It is drawn from hot Physical Constants method
Conduction of heat, thermal diffusion coefficient difference are more than 5%, and this shows polymer and matrix pitch poor compatibility.From table 1
In visible, the modified pitch A coefficient of heat conduction and the equal ＞ of thermal diffusion coefficient difference rate 5%, it can be deduced that conclusion
Sample A storage stability is defective.The method is completely the same (upper and lower with isolation test method test result
Softening point difference is more than 2.5 DEG C).And for modified pitch B, its conduction of heat, thermal diffusion coefficient
Difference is respectively less than 5%, illustrates that the polymer of this modified pitch sample is good with the matrix pitch compatibility, its storage
Qualified stability.Same it can be seen in table 1 that upper and lower softening point difference is less than 2.5 DEG C, use isolation
Test method(s) test result is that storage stability is qualified.This tests with hot Physical Constants test method(s) of the present invention
Result is the most completely the same.
Table 1
Embodiment 2
Mix 60 minutes by High shear device at 180 DEG C with the montmorillonite of matrix pitch and 3%, prepare nothing
Machine material modification Colophonium C, with matrix pitch and the montmorillonite of 3%, and adds the stabilizer (oxygen of 0.5%
Change calcium) prepare inorganic material-modified Colophonium D, take (test tube in the modified pitch injecting tube of hot melt state
A length of 20cm, caliber is 25mm), it is placed in baking oven and is incubated 48h in 163 DEG C, take out test tube sample
Cool down immediately after product, then make Colophonium separate with test tube, and modified pitch is divided into three parts of equal length,
Take top and bottom modified pitch measure the coefficient of heat conduction and thermal diffusion coefficient with thermal constant analyser respectively,
Test the data obtained is shown in Table 2.From hot Physical Constants method, we show that its conduction of heat, thermal diffusion coefficient are poor
More than 5%, illustrate that inorganic montmorillonite is poor with the matrix pitch compatibility.The most upper and lower soft
Change some difference more than 2.5 DEG C, it can be determined that sample C storage stability is defective.This is with hot Physical Constants
Test method(s) test result is completely the same.And for modified pitch D, its conduction of heat, thermal diffusion coefficient
Difference, less than 5%, illustrates that the inorganic matter montmorillonite of this modified pitch sample is fine with the matrix pitch compatibility,
Its storage stability is qualified.From table 2, upper and lower softening point difference is less than 2.5 DEG C equally, stable storage
Property is qualified.This is the most completely the same with hot Physical Constants test method(s) test result.
Table 2
Embodiment 3
Mix 60 minutes by High shear device at 180 DEG C with the nano-calcium carbonate of matrix pitch and 8%, system
Obtain nano-material modified Colophonium E, by basic asphalt and the nano-calcium carbonate of 8% and the stabilizer system of 0.5%
Nano-material modified Colophonium F, take in the modified pitch injecting tube of hot melt state that (test tube is a length of
20cm, caliber is 25mm), it is placed in baking oven and is incubated 48h in 163 DEG C, vertical after taking out cuvette sample
I.e. cool down, then make Colophonium separate with test tube, and modified pitch is divided into three parts of equal length, take top
Measure the coefficient of heat conduction and thermal diffusion coefficient with thermal constant analyser respectively with bottom modified pitch, test institute
Obtain data and be shown in Table 3.From hot Physical Constants test method(s), we show that its conduction of heat, thermal diffusion coefficient difference is big
In 5%, this just illustrates that nano material is poor with the basic asphalt compatibility.Upper and lower softening point from table 3
Difference is more than 2.5 DEG C, and we can show that sample E storage stability is defective.This is with hot Physical Constants
Test method(s) test result is completely the same.And for modified pitch F, its thermal conductance rate variance is less than 5%,
Illustrating that this nano material is good with the basic asphalt compatibility, its storage stability is qualified.Upper from table 3 equally,
Lower softening point difference is less than 2.5 DEG C, and storage stability is qualified.This ties with the test of hot Physical Constants test method(s)
Fruit is the most completely the same.
Table 3
Claims (3)
1. the method for a Fast Evaluation modified pitch storage stability, it is characterised in that step is as follows:
Take in the modified pitch injecting tube of hot melt state, be placed in baking oven and be incubated 48h in 163 DEG C, take out examination
Cool down immediately after pipe sample, then make Colophonium separate with test tube, and modified pitch is divided into the three of equal length
Part, take top and bottom modified pitch measures the coefficient of heat conduction and thermal diffusion system with thermal constant analyser respectively
Number, when the coefficient of heat conduction and thermal diffusion coefficient difference rate all≤5%, then judge modified pitch storage stability
Qualified；When the coefficient of heat conduction and thermal diffusion coefficient difference rate are equal > 5%, then judge modified pitch stable storage
Property is defective.
The method of Fast Evaluation modified pitch storage stability the most according to claim 1, it is special
Levying and be, a length of 20cm of described test tube, caliber is 25mm.
The method of Fast Evaluation modified pitch storage stability the most according to claim 1, it is special
Levying and be, described modified pitch is polymer modified asphalt, mineral-modified Colophonium or nano-material modified
Colophonium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610382253.9A CN105973928B (en) | 2016-06-01 | 2016-06-01 | A kind of method of Fast Evaluation modified pitch storage stability |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610382253.9A CN105973928B (en) | 2016-06-01 | 2016-06-01 | A kind of method of Fast Evaluation modified pitch storage stability |
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| Publication Number | Publication Date |
|---|---|
| CN105973928A true CN105973928A (en) | 2016-09-28 |
| CN105973928B CN105973928B (en) | 2018-09-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610382253.9A Expired - Fee Related CN105973928B (en) | 2016-06-01 | 2016-06-01 | A kind of method of Fast Evaluation modified pitch storage stability |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110132876A (en) * | 2019-06-05 | 2019-08-16 | 山西省交通科技研发有限公司 | A method of SBS polymer modified pitch hot storage stability is measured based on infrared spectrum technology |
| CN114384106A (en) * | 2020-10-22 | 2022-04-22 | 中石油克拉玛依石化有限责任公司 | Method for evaluating thermal storage stability of modified asphalt |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5248200A (en) * | 1992-10-16 | 1993-09-28 | The United States Of America As Represented By The Secretary Of The Army | Portable asphalt stress and strain measuring device |
| US20020014110A1 (en) * | 1998-06-15 | 2002-02-07 | Hussain U. Bahia | Laboratory asphalt stability test and apparatus |
| CN2739637Y (en) * | 2004-10-28 | 2005-11-09 | 长安大学 | Modified asphalt storage stability measuring device |
| CN204718978U (en) * | 2015-06-07 | 2015-10-21 | 西安外事学院 | A kind of polymer modified asphalt storage stability test device |
| CN105445316A (en) * | 2015-11-13 | 2016-03-30 | 长安大学 | Device and method for testing thermal storage stability of modified asphalt |
-
2016
- 2016-06-01 CN CN201610382253.9A patent/CN105973928B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5248200A (en) * | 1992-10-16 | 1993-09-28 | The United States Of America As Represented By The Secretary Of The Army | Portable asphalt stress and strain measuring device |
| US20020014110A1 (en) * | 1998-06-15 | 2002-02-07 | Hussain U. Bahia | Laboratory asphalt stability test and apparatus |
| CN2739637Y (en) * | 2004-10-28 | 2005-11-09 | 长安大学 | Modified asphalt storage stability measuring device |
| CN204718978U (en) * | 2015-06-07 | 2015-10-21 | 西安外事学院 | A kind of polymer modified asphalt storage stability test device |
| CN105445316A (en) * | 2015-11-13 | 2016-03-30 | 长安大学 | Device and method for testing thermal storage stability of modified asphalt |
Non-Patent Citations (2)
| Title |
|---|
| HAIYING FU ET AL.: ""Storage stability and compatibility of asphalt binder modified by SBS graft copolymer"", 《CONSTRUCTION AND BUILDING MATERIALS》 * |
| 交通部公路科学研究所: "《中华人民共和国行业标准 公路工程 沥青及沥青混合料试验规程 JTJ052-200》", 1 October 2000, 人民交通出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110132876A (en) * | 2019-06-05 | 2019-08-16 | 山西省交通科技研发有限公司 | A method of SBS polymer modified pitch hot storage stability is measured based on infrared spectrum technology |
| CN114384106A (en) * | 2020-10-22 | 2022-04-22 | 中石油克拉玛依石化有限责任公司 | Method for evaluating thermal storage stability of modified asphalt |
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| CN105973928B (en) | 2018-09-18 |
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