CN106814181A - One kind specific surface of aggregate from asphalt is peeled off and reclaims bitumen samples method - Google Patents
One kind specific surface of aggregate from asphalt is peeled off and reclaims bitumen samples method Download PDFInfo
- Publication number
- CN106814181A CN106814181A CN201611165875.2A CN201611165875A CN106814181A CN 106814181 A CN106814181 A CN 106814181A CN 201611165875 A CN201611165875 A CN 201611165875A CN 106814181 A CN106814181 A CN 106814181A
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- Prior art keywords
- asphalt
- aggregate
- peeled
- spheroid
- reclaims
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- 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
- 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
Abstract
One kind specific surface of aggregate from asphalt is peeled off and reclaims bitumen samples method.The described method comprises the following steps：Take the part that material asphalt compound gathers materials and be made regular spheroid and gather materials；Spheroid is gathered materials and is put into during material asphalt compound gathers materials, and carry out asphalt and mixed and stirred；Asphalt after to mixing and stirring carries out SHRP short ageings, SHRP long-term ageings simulation respectively；The spheroid that pitch is wrapped with the asphalt of ageing step is gathered materials and is found out, ultra low temperature freezer is put into while being placed in silica gel plate carries out cryogenic freezing；After asphalt membrane is from surface of aggregate stripping, pitch is collected from silica gel plate and follow-up asphalt performance test is carried out.Using this phenomenon different from pitch coefficient of thermal expansion after low temperature brittleness of gathering materials, asphalt membrane is set to be peeled off from surface of aggregate.Not only simple to operate, saving energy consumption of the invention, and avoid influence of the traditional asphalt recovery process to asphalt performance.
Description
Technical field
The invention belongs to bitumen recovery field, and in particular to one kind specific surface of aggregate from asphalt is peeled off and reclaimed
Bitumen samples method.
Background technology
Ageing of asphalt refers to binding agent of the pitch as aggregate in asphalt, and process is mixed, constructs and use in heat
In unavoidably be subject to the outside environmental elements such as temperature, illumination, air and precipitation influenceed and vehicular load in the presence of hair
The process of a series of physical chemical change such as raw volatilization, oxidation.Ageing of asphalt causes bituminous texture, property to change, and enters
And cause Pavement Condition to deteriorate, shorten service life of road surface.Thus ageing of asphalt is to influence the master of durability of asphalt pavement
Factor is wanted, is always the focus of asphalt roads industry research.In order to the ageing properties to different pitches are carried out than choosing, people are usual
Asphalt accelerated ageing simulation is carried out in laboratory, and recovery is stripped to pitch simultaneously in Aging simulation different phase
Carry out performance test.Current bitumen recovery extracting method is mainly Abson method and rotary evaporator method, and the two is in extraction process
In can all destroy pitch original state form and to pitch produce it is a certain degree of secondary aging.Returned present invention, avoiding traditional asphalt
Influence of the skill of knocking off to asphalt performance, prevents pitch secondary aging and simple to operate, convenient to carry out.
The content of the invention
The technical problem of solution：The original of pitch can be destroyed during to bitumen extraction for existing bitumen recovery process
Shape form simultaneously produces a certain degree of secondary aging problem, the present invention to provide a kind of collection specific from asphalt to pitch
Material sur-face peeling reclaims bitumen samples method, can avoid influence of traditional recovery process to asphalt performance, prevents pitch secondary
It is aging and simple to operate, it is convenient to carry out.
Technical scheme：One kind specific surface of aggregate from asphalt is peeled off and reclaims bitumen samples method, including following
Step：
Step one, takes the part that material asphalt compound gathers materials and is made spheroid and gather materials；
Step 2, the spheroid is gathered materials and is put into during material asphalt compound gathers materials, and carry out asphalt and mixed and stirred；
Step 3, the asphalt after mixing and stirring carries out SHRP short ageings, SHRP long-term ageings simulation respectively；
Step 4, the spheroid that pitch is wrapped with the asphalt of ageing step is gathered materials and is found out, and is placed in silica gel plate
Being put into ultra low temperature freezer carries out cryogenic freezing simultaneously；
Step 5, after asphalt membrane is from the stripping of spheroid surface of aggregate, pitch is collected from silica gel plate and follow-up pitch is carried out
Performance test.
Preferably, in the step one regular spheroid a diameter of 10mm.
Preferably, ultra low temperature freezer cryogenic freezing temperature is -40 DEG C~-60 DEG C in the step 4.
Preferably, ultra low temperature freezer cryogenic freezing temperature is preferably -40 DEG C in the step 4.
Preferably, in the step 4 ultra low temperature freezer cryogenic freezing time be 30min~90min.
Preferably, in the step 4 ultra low temperature freezer cryogenic freezing time be 30min.
Beneficial effect：1st, the secondary oxidation of pitch is avoided in removal process, using the specific form of tailor-made aggregate spheroid, just
Found in following the trail of；
2nd, sex differernce is shunk using pitch fragility under low temperature condition and pitch and mineral aggregate, cracking is shelled with mineral aggregate automatically to make pitch
From；
3rd, silica gel plate this feature is not sticked at using pitch, being easy to collect pitch carries out follow-up test；
4th, whole process method is effectively, simple to operate, and can keep the original state form of pitch.
Brief description of the drawings
Fig. 1 is the asphalt performance test chart that extraction process and freezing are reclaimed.
Specific embodiment
Embodiment 1
When carrying out bitumen recovery to asphalt, the specific surface of aggregate from asphalt provided using the present invention
Peel off and reclaim bitumen samples method, specifically include following steps：
Step one, takes the part that material asphalt compound gathers materials and is made the regular spheroid of a diameter of 10mm and gather materials；
Step 2, the spheroid is gathered materials and is put into during material asphalt compound gathers materials, and carry out asphalt and mixed and stirred；
Step 3, to mixing and stirring after asphalt carry out respectively SHRP short ageings, SHRP long-term ageings simulation；
Step 4, the spheroid that pitch is wrapped with the bituminous mixture aggregate of ageing step is gathered materials and is found out, and is placed in silica gel and is put down
Ultra low temperature freezer is put into while plate carries out cryogenic freezing, if spheroid gathers materials, to wrap up in attached pitch not abundant enough, can repeat
Frozen-thawed cycled operates to obtain more bitumen samples；Cryogenic temperature is that value is 40 DEG C below bitumen samples Fraass breaking point
(about -40 DEG C~-60 DEG C), cryogenic freezing time value between 30min~90min according to bitumen samples peeling conditions.
Step 5, after asphalt membrane is from the stripping of spheroid surface of aggregate, pitch is collected from silica gel plate and follow-up pitch is carried out
Performance test.
The asphalt performance for arriving that the pitch and extracting for obtaining is reclaimed to freezing is as follows through measuring：
Bitumen samples based on dynamic shear rheometer respectively to freezing recovery and extracting and reclaiming enter trip temperature and sweep to sample
Retouch test, different absorption methods be analyzed as basic index with complex shear modulus and phase angle, test it is basic
Parameter setting is as follows：
Loading mode is arranged to strain controlling pattern, temperature range is arranged on 28 DEG C~76 DEG C (6 DEG C of gradients), frequency
Rate scope is arranged to 10rad/s, and the parameter for testing piece is set to 25mm diameters and 1000 μm of spacing, and strain value is arranged on 0.1%
(in the viscoelastic range of linearity), obtains following measurement result：
Measurement result：
By experimental result drafting pattern 1, from figure 1 it appears that the mechanical property presence of the pitch that two methods are reclaimed
Larger difference, particularly complex shear modulus, the complex shear modulus of freezing sample is significantly lower than in Range of measuring temp
The complex shear modulus of extraction process sample, further demonstrating the extraction process referred in background of the present invention can cause bitumen samples
It is secondary aging.
Above example absolutely proves that traditional method for extracting has bright with the bitumen samples that method proposed by the present invention is obtained
Aobvious difference, freezing proposed by the present invention effectively avoids the secondary aging of bitumen samples in extractive process, more really
Meet actual asphalt performance.
Claims (6)
1. one kind specific surface of aggregate from asphalt is peeled off and reclaims bitumen samples method, it is characterised in that including following
Step：
Step one, takes the part that material asphalt compound gathers materials and is made spheroid and gather materials；
Step 2, the spheroid is gathered materials and is put into during material asphalt compound gathers materials, and carry out asphalt and mixed and stirred；
Step 3, to mixing and stirring after asphalt carry out respectively SHRP short ageings, SHRP long-term ageings simulation；
Step 4, the spheroid that pitch is wrapped with the asphalt of ageing step is gathered materials and is found out, while being placed in silica gel plate
Being put into ultra low temperature freezer carries out cryogenic freezing；
Step 5, after asphalt membrane is from the stripping of spheroid surface of aggregate, pitch is collected from silica gel plate and follow-up asphalt performance is carried out
Test.
2. one kind according to claim 1 specific surface of aggregate from asphalt is peeled off and reclaims bitumen samples method,
Characterized in that, in the step one regular spheroid a diameter of 10mm.
3. one kind according to claim 1 specific surface of aggregate from asphalt is peeled off and reclaims bitumen samples method,
Characterized in that, ultra low temperature freezer cryogenic freezing temperature is -40 DEG C~-60 DEG C in the step 4.
4. one kind according to claim 1 specific surface of aggregate from asphalt is peeled off and reclaims bitumen samples method,
Characterized in that, ultra low temperature freezer cryogenic freezing temperature is preferably -40 DEG C in the step 4.
5. one kind according to claim 1 specific surface of aggregate from asphalt is peeled off and reclaims bitumen samples method,
Characterized in that, in the step 4 ultra low temperature freezer cryogenic freezing time be 30min~90min.
6. one kind according to claim 1 specific surface of aggregate from asphalt is peeled off and reclaims bitumen samples method,
Characterized in that, in the step 4 ultra low temperature freezer cryogenic freezing time be 30min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611165875.2A CN106814181B (en) | 2016-12-16 | 2016-12-16 | One kind specific surface of aggregate removing recycling bitumen samples method from asphalt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611165875.2A CN106814181B (en) | 2016-12-16 | 2016-12-16 | One kind specific surface of aggregate removing recycling bitumen samples method from asphalt |
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| Publication Number | Publication Date |
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| CN106814181A true CN106814181A (en) | 2017-06-09 |
| CN106814181B CN106814181B (en) | 2019-04-05 |
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Cited By (3)
| 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 |
| CN110133024A (en) * | 2019-04-16 | 2019-08-16 | 平高集团有限公司 | A kind of detection method and application of high-voltage switch gear insulating materials sintering microdefect |
| CN110523638A (en) * | 2019-07-24 | 2019-12-03 | 福建铁拓机械有限公司 | A method of fine aggregate is removed from waste asphalt mixture aggregate surface |
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| CN103013548B (en) * | 2012-12-07 | 2014-08-06 | 江苏苏博特新材料股份有限公司 | Method for recovery of asphalt from asphalt mixture |
| CN105716999A (en) * | 2016-04-14 | 2016-06-29 | 河海大学 | Method for evaluating diffusion efficiency of regenerant for recycled asphalt mixture |
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2016
- 2016-12-16 CN CN201611165875.2A patent/CN106814181B/en active Active
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| 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 |
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Cited By (4)
| 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 |
| CN110133024A (en) * | 2019-04-16 | 2019-08-16 | 平高集团有限公司 | A kind of detection method and application of high-voltage switch gear insulating materials sintering microdefect |
| CN110523638A (en) * | 2019-07-24 | 2019-12-03 | 福建铁拓机械有限公司 | A method of fine aggregate is removed from waste asphalt mixture aggregate surface |
| CN110523638B (en) * | 2019-07-24 | 2020-10-02 | 福建省铁拓机械股份有限公司 | Method for stripping fine aggregate from surface of waste asphalt mixture aggregate |
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| Publication number | Publication date |
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| CN106814181B (en) | 2019-04-05 |
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