CN106280507B - A kind of composite modified asphalt and preparation method thereof - Google Patents
A kind of composite modified asphalt and preparation method thereof Download PDFInfo
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- CN106280507B CN106280507B CN201610679076.0A CN201610679076A CN106280507B CN 106280507 B CN106280507 B CN 106280507B CN 201610679076 A CN201610679076 A CN 201610679076A CN 106280507 B CN106280507 B CN 106280507B
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- pitch
- composite modified
- sulfur doping
- graphene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L95/00—Compositions of bituminous materials, e.g. asphalt, tar, pitch
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2312/00—Crosslinking
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2555/00—Characteristics of bituminous mixtures
- C08L2555/40—Mixtures based upon bitumen or asphalt containing functional additives
- C08L2555/50—Inorganic non-macromolecular ingredients
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2555/00—Characteristics of bituminous mixtures
- C08L2555/40—Mixtures based upon bitumen or asphalt containing functional additives
- C08L2555/50—Inorganic non-macromolecular ingredients
- C08L2555/54—Sulfur or carbon black
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2555/00—Characteristics of bituminous mixtures
- C08L2555/40—Mixtures based upon bitumen or asphalt containing functional additives
- C08L2555/80—Macromolecular constituents
Abstract
The invention discloses a kind of composite modified asphalts and preparation method thereof, belong to pavement construction material technical field.Technical solution of the present invention main points are as follows: a kind of composite modified asphalt is prepared by the raw material of following weight percentage: sulfur doping graphene 1%~10%, promotor 1%~5%, waste Crumb rubber 15%~30%, surplus are matrix pitch.The invention also discloses the preparation methods of the composite modified asphalt.The present invention is using sulfur doping graphene as crosslinking agent and modifying agent, on the one hand crosslinked action is played by the sulphur atom in sulfur doping graphene molecules structure and improves the degree of cross linking between modified pitch each component material, on the other hand pitch is modified by the good physical behavior of sulfur doping graphene and the structural behaviour of graphene is imparted in modified pitch, the composite modified asphalt of final obtained function admirable.
Description
Technical field
The invention belongs to pavement construction material technical fields, and in particular to a kind of composite modified asphalt and preparation method thereof.
Background technique
With the development of the automobile industry, a large amount of tire is discarded, and waste tire is processed into waste Crumb rubber and is applied to drip
During blueness is modified, not only there is larger improvement to the high and low temperature performance of pitch, but also cost of paving the way can also be reduced, realize following for resource
Ring utilizes.In technique of the waste Crumb rubber to asphalt modification, presently, there are the technical problem of some keys, such as waste Crumb rubber and
Mainly exist in the form of physical blending between pitch, since rubber macromolecule and matrix pitch compatibility are insufficient, modified pitch
Storage stability is insufficient, has seriously affected performance of modified bitumen.Provided that a large amount of heat meets waste Crumb rubber and pitch
Between cross-linking reaction, then need higher reaction temperature, will lead to ageing of asphalt and waste Crumb rubber again in this case
Excessive degradation, cause the serious decay of performance of modified bitumen.
In order to give full play to waste Crumb rubber to the modifying function of pitch, current some technical measures are used to improve waste Crumb rubber
Stability in pitch.For example, improving waste Crumb rubber in pitch using organic solvent in modified pitch process flow
Compatibility, or the interface interaction using coupling agent improvement waste Crumb rubber and pitch.But the use of these auxiliary agents, while often
It is easy to bring some counter productives, the introducing of organic solvent or coupling agent is easy to play plastication, weakens rubber powder pair
The modified effect of pitch, and the auxiliary agent of these additions, itself does not have modified function, cannot cooperate with and change with waste Crumb rubber performance
Property effect.
Graphene is emerging functional material, and each carbon atom passes through very strong σ key and other 3 in graphene-structured
Carbon atom is connected, these carbon-to-carbons σ key causes graphene sheet layer to have extremely excellent mechanical property and structural rigidity, in order to
The Electronic Performance and chemical activity of graphene are improved, the product that some pairs of graphenes are doped modification also gradually obtains research and answers
With.Sulfur doping graphene is exactly to adulterate sulphur atom to be present in one of graphene lattice structure material, and doping sulphur atom has
Certain chemical property, therefore sulfur doping graphene had not only remained the mechanical property of graphene, but also had certain chemical activity,
It is expected to be applied in numerous areas.
Summary of the invention
There is ideal pavement performance the technical problem to be solved by the present invention is to provide one kind and storage stability is good multiple
Modified pitch is closed, and the present invention provides a kind of preparation method of composite modified asphalt, the present invention utilizes sulfur doping graphene
As crosslinking agent and modifying agent, crosslinked action is on the one hand played by the sulphur atom in sulfur doping graphene molecules structure and is improved
The degree of cross linking between modified pitch each component material, on the other hand by the good physical behavior of sulfur doping graphene to pitch into
The structural behaviour of graphene is imparted in modified pitch by row modification, the composite modified asphalt of final obtained function admirable.
The present invention adopts the following technical scheme that solve above-mentioned technical problem, a kind of composite modified asphalt, it is characterised in that
It is prepared by the raw material of following weight percentage:
Sulfur doping graphene 1%~10%,
Promotor 1%~5%,
Waste Crumb rubber 15%~30%,
Surplus is matrix pitch,
Wherein promotor be 2- benzothiazolyl mercaptan, zinc 2-mercaptobenzothiazole salt, dibenzothiazyl disulfide, 4,
One of 4'- dimorpholinyl disulfide, diphenylguanidine, tetramethylthiuram disulfide or thioresorcin bithiophene are a variety of.
Further preferably, the mesh number of the waste Crumb rubber is 40 mesh, 60 mesh or 80 mesh.
The preparation method of composite modified asphalt of the present invention, it is characterised in that specific steps are as follows: according to above-mentioned weight
Per distribution ratio weighs raw material, first heating melting matrix pitch respectively, and keeping temperature is 130~150 DEG C, and sulfur doping graphite is added
Alkene simultaneously carries out 2~6h of mechanical stirring, then is warming up to 160~180 DEG C, and waste Crumb rubber then is added under stirring, then drops
Temperature is sufficiently swollen, continuation carries out 0.5~1h of shearing, shearing temperature on high-speed shearing machine to 120~150 DEG C of 1~4h of holding to it
Degree is 120~150 DEG C, then heats to 160~180 DEG C, after temperature is stablized, promotor is added while stirring, promotor adds
After entering, continue 0.5~1h of insulated and stirred, composite modified asphalt is finally made.
Innovative point of the invention and it is a technical advantage that:
1, for the present invention using sulfur doping graphene as crosslinking agent, the doping sulphur atom in graphene-structured can trigger sulphur
Cross-linking reaction between doped graphene, waste rubber powder and matrix pitch, so that the polynary material in composite modified asphalt product
Expect that component cross-link becomes space network, greatly improves the storage stability of modified pitch；
2, the present invention is grafted on asphaltene molecule chain by cross-linking reaction, graphene-structured, and it is good to impart modified pitch
Mechanical property, realize the essence chemical modification to asphalt performance；
3, graphene-structured has good strength character, and waste Crumb rubber has good viscoplasticity, and the present invention utilizes sulphur
Doped graphene and waste Crumb rubber are composite modified to matrix pitch progress, can play in microcosmic point the collaboration of " tempering toughness with gentleness "
Modified effect；
4, composite modified asphalt technological operation provided by the invention is easy, and does not need excessive temperature, both energy saving,
The Performance Decay of modified pitch is effectively prevented again.
Specific embodiment
Above content of the invention is described in further details by the following examples, but this should not be interpreted as to this
The range for inventing above-mentioned theme is only limitted to embodiment below, and all technologies realized based on above content of the present invention belong to this hair
Bright range.
Embodiment 1
Heating 790g first melts matrix pitch, and keeping temperature is 130 DEG C, and 10g sulfur doping graphene is added and carries out machine
Tool stirs 2h, then is warming up to 160 DEG C, and the waste Crumb rubber of 80 mesh of 150g is then added under stirring, is then cooled to 120
DEG C 1h is kept, is swollen it sufficiently, continuation carries out shearing 0.5h on high-speed shearing machine, and shear temperature is 120 DEG C, next rises
Temperature is to 160 DEG C, after temperature is stablized, 50g 2- benzothiazolyl mercaptan is added while stirring, 2- benzothiazolyl mercaptan is added
After, continue insulated and stirred 0.5h, composite modified asphalt is finally made.
The pavement performance detection method of composite modified asphalt is referring to " highway engineering pitch and asphalt Experimental Procedures "
JTGE20-2011 is carried out, and test result is shown in Table 1.
Embodiment 2
Heating 700g first melts matrix pitch, and keeping temperature is 140 DEG C, and 50g sulfur doping graphene is added and carries out machine
Tool stirs 4h, then is warming up to 170 DEG C, and the waste Crumb rubber of 60 mesh of 220g is then added under stirring, is then cooled to 145
DEG C 3h is kept, is swollen it sufficiently, continuation carries out shearing 0.8h on high-speed shearing machine, and shear temperature is 145 DEG C, next rises
Temperature is to 170 DEG C, after temperature is stablized, 45g 4,4'- dimorpholinyl disulfide is added while stirring, 4,4'- dimorpholinyl disulfides add
After entering, continue insulated and stirred 0.6h, composite modified asphalt is finally made.
The pavement performance detection method of composite modified asphalt is referring to " highway engineering pitch and asphalt Experimental Procedures "
JTGE20-2011 is carried out, and test result is shown in Table 1.
Embodiment 3
Heating 590g first melts matrix pitch, and keeping temperature is 150 DEG C, and 100g sulfur doping graphene is added and carries out machine
Tool stirs 6h, then is warming up to 180 DEG C, and the waste Crumb rubber of 40 mesh of 300g is then added under stirring, is then cooled to 150
DEG C 4h is kept, is swollen it sufficiently, continuation carries out shearing 1h on high-speed shearing machine, and shear temperature is 150 DEG C, next heats up
To 180 DEG C, after temperature is stablized, 60g diphenylguanidine is added while stirring, after diphenylguanidine is added, continues insulated and stirred 1h, most
Obtained composite modified asphalt eventually.
The pavement performance detection method of composite modified asphalt is referring to " highway engineering pitch and asphalt Experimental Procedures "
JTGE20-2011 is carried out, and test result is shown in Table 1.
1 composite modified asphalt the performance test results of table
| Index | Softening point (DEG C) | 5 DEG C of ductilities (cm) | Elasticity restores (%) |
| Embodiment 1 | 62 | 36 | 82 |
| Embodiment 2 | 75 | 48 | 87 |
| Embodiment 3 | 81 | 55 | 92 |
Embodiment above describes basic principles and main features of the invention and advantage, the technical staff of the industry should
Understand, the present invention is not limited to the above embodiments, and the above embodiments and description only describe originals of the invention
Reason, under the range for not departing from the principle of the invention, various changes and improvements may be made to the invention, these changes and improvements are each fallen within
In the scope of protection of the invention.
Claims (2)
1. a kind of preparation method of composite modified asphalt, it is characterised in that the NEW TYPE OF COMPOSITE modified pitch is by following weight percent
The raw material of content is prepared:
Sulfur doping graphene 1%~10%,
Promotor 1%~5%,
Waste Crumb rubber 15%~30%,
Surplus is matrix pitch,
Wherein promotor is 2- benzothiazolyl mercaptan, zinc 2-mercaptobenzothiazole salt, dibenzothiazyl disulfide, 4,4
One of '-dimorpholinyl disulfide, diphenylguanidine, tetramethylthiuram disulfide or thioresorcin bithiophene are a variety of；
Specific steps are as follows: weigh raw material, first heating melting matrix pitch respectively according to above-mentioned weight percent proportion, keep temperature
It is 130~150 DEG C, sulfur doping graphene is added and carries out 2~6h of mechanical stirring, then is warming up to 160~180 DEG C, is then stirring
It mixes and waste Crumb rubber is added under state, be then cooled to 120~150 DEG C of 1~4h of holding, be sufficiently swollen to it, continuation is being cut at a high speed
It cuts and carries out shearing 0 .5~1h on machine, shear temperature is 120~150 DEG C, then heats to 160~180 DEG C, stablizes to temperature
Afterwards, promotor is added while stirring, after promotor is added, continues 0 .5 of insulated and stirred~1h, is finally made composite modified
Pitch.
2. preparation method according to claim 1, it is characterised in that: the mesh number of the waste Crumb rubber be 40 mesh, 60 mesh or
80 mesh.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610679076.0A CN106280507B (en) | 2016-08-17 | 2016-08-17 | A kind of composite modified asphalt and preparation method thereof |
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| CN201610679076.0A CN106280507B (en) | 2016-08-17 | 2016-08-17 | A kind of composite modified asphalt and preparation method thereof |
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| CN106280507B true CN106280507B (en) | 2019-04-30 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108559289B (en) * | 2018-05-14 | 2021-03-30 | 重庆路维康交通科技有限公司 | Nano modified emulsified asphalt and preparation and use methods thereof |
| CN108690360B (en) * | 2018-06-20 | 2021-01-05 | 广西大学 | Graphene composite rubber asphalt modifier and preparation method and application thereof |
| CN110144128B (en) * | 2019-06-13 | 2021-02-26 | 安徽省高等级公路工程监理有限公司 | Modified asphalt mixed material for ultrahigh-durability highway pavement |
Citations (7)
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| CN103694717A (en) * | 2013-12-30 | 2014-04-02 | 上海浦东路桥建设股份有限公司 | Road bitumen with high heat conduction efficiency and preparation method thereof |
| CN103819915A (en) * | 2014-02-26 | 2014-05-28 | 西安理工大学 | Graphene oxide modified asphalt and preparation method thereof |
| CN103834185A (en) * | 2014-02-26 | 2014-06-04 | 西安理工大学 | Polyurethane/nano-composite modified asphalt and preparation method thereof |
| CN104448868A (en) * | 2015-01-06 | 2015-03-25 | 山西省交通科学研究院 | SBS modified asphalt based on graphene oxide and preparing method thereof |
| CN105176086A (en) * | 2014-05-28 | 2015-12-23 | 中国科学院苏州纳米技术与纳米仿生研究所 | Oriented graphene/polymer composite system, and preparation method and application thereof |
| CN105366664A (en) * | 2014-08-27 | 2016-03-02 | 中国石油化工股份有限公司 | Production method for sulfur-doped graphene |
| CN105366662A (en) * | 2014-08-27 | 2016-03-02 | 中国石油化工股份有限公司 | Preparing method for sulfur-doped graphene |
-
2016
- 2016-08-17 CN CN201610679076.0A patent/CN106280507B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103694717A (en) * | 2013-12-30 | 2014-04-02 | 上海浦东路桥建设股份有限公司 | Road bitumen with high heat conduction efficiency and preparation method thereof |
| CN103819915A (en) * | 2014-02-26 | 2014-05-28 | 西安理工大学 | Graphene oxide modified asphalt and preparation method thereof |
| CN103834185A (en) * | 2014-02-26 | 2014-06-04 | 西安理工大学 | Polyurethane/nano-composite modified asphalt and preparation method thereof |
| CN105176086A (en) * | 2014-05-28 | 2015-12-23 | 中国科学院苏州纳米技术与纳米仿生研究所 | Oriented graphene/polymer composite system, and preparation method and application thereof |
| CN105366664A (en) * | 2014-08-27 | 2016-03-02 | 中国石油化工股份有限公司 | Production method for sulfur-doped graphene |
| CN105366662A (en) * | 2014-08-27 | 2016-03-02 | 中国石油化工股份有限公司 | Preparing method for sulfur-doped graphene |
| CN104448868A (en) * | 2015-01-06 | 2015-03-25 | 山西省交通科学研究院 | SBS modified asphalt based on graphene oxide and preparing method thereof |
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