CN106810126A - A kind of asphalt based on Graphene anti-rut agent and preparation method thereof - Google Patents
A kind of asphalt based on Graphene anti-rut agent and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a kind of asphalt based on Graphene anti-rut agent, including mineral aggregate, Graphene anti-rut agent, pitch and miberal powder, the Graphene anti-rut agent accounts for the 0.2%~0.5% of the asphalt weight, and the Graphene anti-rut agent is made up of following component：10~50 parts of polyolefin, thermoplastic elastomer (TPE) vinylaromatic hydrocarbon -3~20 parts of conjugated diene block copolymer, 10~30 parts of Graphene, 1~5 part of interfacial agent, above number is by weight.Graphene is filled in Graphene anti-rut agent of the invention as modifier modification pitch, be conducive to anti-rut agent rapid dispersion in asphalt, under the double action of Graphene and interfacial agent, anti-rut agent is accelerated to disperse in asphalt, the time needed for reducing mix dispersion；Simultaneously as interface interaction, enables the interface between pitch and mineral aggregate to reduce, more conducively the compacting on road surface, passage, cracking in reduction pavement spread roller compaction process etc..The features such as present invention has process is simple, relatively low energy consumption, environmental protection and good application prospect.The present invention also provides a kind of preparation method of the above-mentioned asphalt based on Graphene anti-rut agent.
Description
Technical field
It is more particularly to a kind of to be based on Graphene Rut resistance the present invention relates to Expressway Pavement Material field
Asphalt of agent and preparation method thereof.
Background technology
High temperature Rutting damage is that the first of interior Protective Measures of Bitumen Pavement Initial Damage brings disaster upon for quite a long time from now on, its master
It is caused by movement, the passage that middle surface layer unstability is caused to want reason.Damaged early stage bituminous paving
Especially protruded the most with high temperature Rutting damage in bad, this key factor is in the reason for four aspects：
1) rare history high temperature.As 01 year northern China runs into 50 years rare history high temperature；
South runs into 100 years rare history high temperature within 02 year.After the trend of global warming may cause
The rare high temperature of history comes one after another.
2) the heavily loaded traffic that overloads grows in intensity.The weight metering charging of implementation is actual now shows
Helpless and silent approvement of the traffic department to overload Heavy Traffic situation.
3) the canalized traffic feature of highway and the inevitable Large Longitudinal Slope of mountainous area highway
Feature exacerbates rut.
4)《Asphalt pavement design criterion JTJ 014-97》Emphasize there must be one layer of closely knit I that suspends
Type structurally waterproof, causes to attend to one thing and lose sight of another, rut aggravation.
In order to solve problem above, the scheme of conventional solution rut has three kinds：
One is improved gradation.Anti-rut behavior may be improve if improved gradation is bad, and is produced
Water Damage.
Two is asphalt modification.The effect of asphalt modification is relatively good, but there is the phase of pitch and modifying agent
Capacitive problem, in order to reach anti-rut behavior higher, it is necessary to the modifying agent of high dose, and agent high
The modifying agent of amount is difficult to be uniformly dispersed in pitch, and can go out with during storage in transit
The laminated segregation of existing modifying agent and pitch, its performance is not so good as matrix pitch on the contrary.It is additionally present of cost
Problem higher.
Three is fiber reinforcement.Fibre-reinforced effect preferably, will equally reach Rut resistance higher
Can when, it is necessary to the fiber of high additive, and the fiber of high additive is difficult to disperse equal in asphalt
It is even, disperse uneven Fiber Asphalt Mixture not have humidification not only, on the contrary dredge structure
Loose intensity decreases.
At present, the research of modified pitch uses polymer as rut modifying agent mostly, to pitch
The improvement of energy is limited.Rut modifying agent at this stage generally requires extension and mixes in the production of actual mix
Conjunction time 10-15s, considerable influence production efficiency, additionally, drip prepared by common rut modifying agent
Easily there is passage, problems of crack during decking and rolling in blue or green compound, is unfavorable for rolling pressure
It is real.
Graphene is the only one layer of atom thick for being stripped out from graphite material, being made up of carbon atom
The two dimensional crystal of degree, generally includes single-layer graphene, bilayer graphene, few layer graphene, multilayer
Or the graphene oxide that thick-layer Graphene and process treatment are obtained.
Single-layer graphene：Refer to periodically tight with benzene ring structure (i.e. hexagonal honeycomb structure) by one layer
A kind of two-dimentional carbon material that closely packed carbon atom is constituted.
Bilayer graphene：Refer to periodically tight with benzene ring structure (i.e. hexagonal honeycomb structure) by two-layer
Closely packed carbon atom is with different way of stacking (including AB stackings, AA stackings, AA ' stackings
Deng) stacking constitute a kind of two-dimentional carbon material.
Few layer graphene：Refer to by 3-10 layers with benzene ring structure (i.e. hexagonal honeycomb structure) periodicity
Closelypacked carbon atom is with different way of stacking (including ABC stackings, ABA stackings etc.) heap
A kind of two-dimentional carbon material that pile is constituted.
Multilayer or thick-layer Graphene：Dinger thickness degree below 10nm benzene ring structures (i.e. six more than 10 layers
Angular honeycomb structure) periodically closelypacked carbon atom is with different way of stacking (including ABC
Stacking, ABA stackings etc.) stacking constitute a kind of two-dimentional carbon material.
Graphene oxide thin slice is powdered graphite through the product after chemical oxidation and stripping, graphite oxide
Alkene is single atomic layer, can expand to some tens of pm on lateral dimension at any time, therefore, its
The typical size of the general chemistry of construct trans and material science.Graphene oxide can be considered a kind of non-
The flexible material of conventional configuration, the characteristic with polymer, colloid, film, and amphiphatic molecule.
The molecular formula of graphene oxide：
Graphene has high intensity, high heat conduction, high connductivity and heat resistance, and Graphene has by force
The high nanometer two-dimensional structure of degree, its anisotropic structure can form cross network in liquid system
Structure so that system resistance to overturning is significantly increased.
Rut modifying agent at this stage generally requires extension duration of mixing in the production of actual mix
10-15s, considerable influence production efficiency, additionally, asphalt prepared by rut modifying agent exists
Easily occur passage, problems of crack during decking and rolling, be unfavorable for rolling compacting.
The content of the invention
The invention aims to overcome defect recited above, there is provided a kind of anti-based on Graphene
The asphalt of rut agent.
In order to solve the problems, such as techniques as described above, the present invention takes following technical scheme：
The technical solution adopted by the present invention is：A kind of pitch mixing based on Graphene anti-rut agent
Material, including mineral aggregate, Graphene anti-rut agent, pitch and miberal powder, the Graphene anti-rut agent are accounted for
The 0.2%~0.5% of the asphalt weight, the Graphene anti-rut agent is by following component system
Into：10~50 parts of polyolefin, thermoplastic elastomer (TPE) vinylaromatic hydrocarbon-conjugated diene block
3~20 parts of thing, 10~30 parts of Graphene, 1~5 part of interfacial agent, above number is by weight
Meter.
Preferably, the polyolefin be PE, PP, EVA, APP, APAO, POE, HDPE,
One or more in LDPE and LLDPE.
Preferably, the thermoplastic elastomer (TPE) vinylaromatic hydrocarbon-conjugated diene block copolymer is
One or more in SBS, SIS, SEBS and SEPS.
Preferably, the Graphene is single-layer graphene, bilayer graphene, multi-layer graphene and oxygen
One or more in graphite alkene.
Preferably, the interfacial agent is amphoteric ionic surfactant, the amphion
Type surfactant is in alkyl imidazoline type halide hydrochlorate or alkyl betaine halide hydrochlorate
One or more.
In order to solve the above technical problems, another technical solution used in the present invention is：One kind is based on
The preparation method of the asphalt of Graphene anti-rut agent, its step is as follows：
1) mineral aggregate is heated to 170-180 DEG C, and is put into malaxation device；
2) will be equivalent to asphalt weight 0.2%-0.5% anti-rut agent add malaxation device in,
Dry mixing 80s；
3) 165-175 DEG C of pitch is added, continues mix 80s；
4) miberal powder is added to continue mix 90s.
The beneficial effects of the invention are as follows：It is different from the situation of prior art, traffic stone of the invention
Black alkene anti-rut agent fills Graphene as modifier modification pitch, because Graphene has amphiphilic
Property, hydrophilic to hydrophobic property distribution is presented from graphene platelet edge to center, as interface is lived
Property agent generally there are interface, can reduce the energy between interface, and coordinates interface activating agent is compounded, and is had
It is dual with interfacial agent in Graphene beneficial to anti-rut agent rapid dispersion in asphalt
Under effect, anti-rut agent is accelerated to disperse in asphalt, the time needed for reducing mix dispersion,
The production efficiency of mixing station is improved, production cost is reduced；Simultaneously as interface interaction, makes pitch
Interface between mineral aggregate can reduce, more conducively the compacting on road surface, reduce pavement spread roller compaction process
In passage, cracking etc..The present invention has process is simple, relatively low energy consumption, environmental protection and application
The features such as prospect is good.
Specific embodiment
The present invention provides a kind of asphalt based on Graphene anti-rut agent, including mineral aggregate, stone
Black alkene anti-rut agent, pitch and miberal powder, Graphene anti-rut agent account for the asphalt weight
0.2%~0.5%, Graphene anti-rut agent is made up of following component：10~50 parts of polyolefin, heat
Thermoplastic elastic vinylaromatic hydrocarbon -3~20 parts of conjugated diene block copolymer, Graphene 10~
30 parts, 1~5 part of interfacial agent, above number is by weight.
Polyolefin be PE, PP, EVA, APP, APAO, POE, HDPE, LDPE and
One or more in LLDPE.
Thermoplastic elastomer (TPE) vinylaromatic hydrocarbon-conjugated diene block copolymer be SBS, SIS,
One or more in SEBS and SEPS.
Graphene is in single-layer graphene, bilayer graphene, multi-layer graphene and graphene oxide
One or more.
Interfacial agent is amphoteric ionic surfactant, and amphoteric ionic surfactant is alkane
One or more in base imidazoline type halide hydrochlorate or alkyl betaine halide hydrochlorate.
In addition, the present invention also provides a kind of above-mentioned asphalt based on Graphene anti-rut agent
Preparation method, its step is as follows：
1) mineral aggregate is heated to 170-180 DEG C, and is put into malaxation device；
2) will be equivalent to mineral aggregate weight 0.2%-0.5% anti-rut agent add malaxation device in, dry mixing
80s；
3) 165-175 DEG C of pitch is added, continues mix 80s；
4) miberal powder is added to continue mix 90s.
Following specific embodiment of the invention and comparative example by being given will be further elaborated ground
The solution present invention, but they are not limitation of the invention.
Embodiment 1：
The preparation process of Graphene anti-rut agent is as follows：
A () weighs 10 parts of PE and 20 part of SBS respectively by weight；It is 15r/min in rotating speed
Under the conditions of, PE and SBS are well mixed；
B mixture that () obtains step (a) is warming up to 80 DEG C in 8min, adds 5 parts
C18 alkyl imidazoline halide potassium phosphates；Then 150 DEG C are warming up to, 30 parts of mono-layer graphites are added
Alkene, is finally warming up to 200 DEG C in 5min；
C () mixture obtained by step (b), by double screw extruder extrusion moulding, is obtained
Finished product, while barrelling is with standby.
The preparation technology of asphalt is as follows：
1) mineral aggregate is heated to 170-180 DEG C, and is put into malaxation device；
2) will be equivalent to mineral aggregate weight 0.5% Graphene anti-rut agent add malaxation device in, dry mixing
80s；
3) 165 DEG C of pitch is added, continues mix 80s；
4) miberal powder is added to continue mix 90s.
Gained asphalt is carried out respectively asphalt Marshall residual stability experiment,
Strong ratio experiment, rut dynamic stability test and low temperature bend test are split in freeze thawing, and result of the test is shown in Table 2.
Embodiment 2：
The preparation process of Graphene anti-rut agent is as follows：
A () weighs 30 parts of PE, 10 parts of APP, 5 parts of LDPE, 5 parts of EVA respectively by weight
And 3 parts of SEBS；Under the conditions of rotating speed is 15r/min, above-mentioned material is well mixed；
B mixture that () obtains step (a) is warming up to 80 DEG C in 12min, adds 3 parts
Alkylamide propyl-betaine halide potassium phosphate；Then 150 DEG C are warming up to, 10 parts of oxidations are added
Graphene, is finally warming up to 200 DEG C in 3min；
C () mixture obtained by step (b), by double screw extruder extrusion moulding, is obtained
Finished product, while barrelling is with standby.
The preparation technology of asphalt is as follows：
1) mineral aggregate is heated to 170-180 DEG C, and is put into malaxation device；
2) will be equivalent to mineral aggregate weight 0.2% Graphene anti-rut agent add malaxation device in, dry mixing
80s；
3) 175 DEG C of pitch is added, continues mix 80s；
4) miberal powder is added to continue mix 90s.
Gained asphalt is carried out respectively asphalt Marshall residual stability experiment,
Strong ratio experiment, rut dynamic stability test and low temperature bend test are split in freeze thawing, and result of the test is shown in Table 2.
Embodiment 3：
The preparation process of Graphene anti-rut agent is as follows：
A () weighs 20 parts of PE respectively by weight, 10 parts of LDPE, 5 parts EVA and 15 part
SBS；Under the conditions of rotating speed is 25r/min, above-mentioned material is well mixed；
B mixture that () obtains step (a) is warming up to 80 DEG C in 10min, adds 1 part
Alkyl imidazoline halide potassium phosphate；Then be warming up to 150 DEG C, add 15 parts of graphene oxides and
5 parts of multi-layer graphenes, are finally warming up to 200 DEG C in 4min；
C () will pass through double screw extruder extrusion moulding after the mixture cooling obtained by step (b),
Finished product, while barrelling is with standby.
The preparation technology of asphalt is as follows：
1) mineral aggregate is heated to 170-180 DEG C, and is put into malaxation device；
2) will be equivalent to mineral aggregate weight 0.5% Graphene anti-rut agent add malaxation device in, dry mixing
80s；
3) 170 DEG C of pitch is added, continues mix 80s；
4) miberal powder is added to continue mix 90s.
Gained asphalt is carried out respectively asphalt Marshall residual stability experiment,
Strong ratio experiment, rut dynamic stability test and low temperature bend test are split in freeze thawing, and result of the test is shown in Table 2.
Embodiment 4：
The preparation process of Graphene anti-rut agent is as follows：
A () weighs 20 parts of HDPE, 10 parts of APP, 5 parts of EVA and 18 respectively by weight
Part SBS；Under the conditions of rotating speed is 25r/min, above-mentioned material is well mixed；
B mixture that () obtains step (a) is warming up to 80 DEG C in 12min, adds 1 part
Alkyl imidazoline halide potassium phosphate；Then be warming up to 150 DEG C, add 20 parts of graphene oxides and
5 parts of bilayer graphenes, are finally warming up to 200 DEG C in 4min；
C () will pass through double screw extruder extrusion moulding after the mixture cooling obtained by step (b),
Finished product, while barrelling is with standby.
The preparation technology of asphalt is as follows：
1) mineral aggregate is heated to 170-180 DEG C, and is put into malaxation device；
2) will be equivalent to mineral aggregate weight 0.5% Graphene anti-rut agent add malaxation device in, dry mixing
80s；
3) 165 DEG C of pitch is added, continues mix 80s；
4) miberal powder is added to continue mix 90s.
Gained asphalt is carried out respectively asphalt Marshall residual stability experiment,
Strong ratio experiment, rut dynamic stability test and low temperature bend test are split in freeze thawing, and result of the test is shown in Table 2.
Comparative example 1：
In this comparative example, asphalt is mixed using 70# asphalt and aggregate mix, pitch
Mineral aggregate is first heated when closing material production mix, then by asphalt weight 0.5% by common anti-rut agent
Dry mixing 90s in mineral aggregate is added, pitch wet-mixing 90s is subsequently adding, then add miberal powder mix 90s.Respectively
Carry out the Marshall residual stability experiment of asphalt, freeze thawing split it is strong dynamic more steady than experiment, rut
Fixed degree experiment and low temperature bend test are shown in Table 2.
AC-13 Bituminous Mixture Ratios use No. 70 heavy traffic paving asphalts, meet after testing《Highway
Asphalt Pavement Construction Technique specification》(JTG F40-2004) is to No. 70 bi tumenf orr oad A grades of marks
Accurate requirement.
AC-13 Bituminous Mixture Ratios use limestone：10-20mm rubbles, 10-15mm are broken
Stone, 5-10mm rubbles, 0-5 aggregate chips.Meet after testing《Standard specification for construction and acceptance of highway asphalt pavement》
(JTG F40-2004) is required asphalt surface course with aggregate quality.
AC-13 Filler in Asphalt Concrete uses limestone dust, meets after testing《Highway asphalt road
Surface construction technical specification》(JTG F40-2004) is required asphalt surface course with packing quality.
The AC-13 mixture gradation type lists of table 1
Embodiment 1-4 and the gained end properties of comparative example 1 are tested：According to《Asphalt highway is applied
Work technical specification》(JTG F40-2004) hot-mix asphalt mixture mixing proportion design method, carries out horse
Xie Er asphalt optimum content design experiments.
The performance of asphalt mixture index of table 2
By upper table 2 as can be seen that after admixture asphalt modifier of the invention, respectively being tried in embodiment
The voidage of part all decreases compared with comparative example, illustrates to be more conducive to compound after adding this rut agent
Compacting；The dynamic stability of embodiment is significantly improved compared with comparative example 1 in table, therefore asphalt is anti-
Rut performance is significantly improved；Residual stability and freeze-thaw split intensity in embodiment is all compared with comparative example
1 increases, and illustrates that the addition of anti-rut agent is conducive to improving the water stabilizing of compound；Together
When contrast find low temperature damage strain with comparative example slightly have lifting, illustrate asphalt modifier of the invention
The cryogenic property to asphalt makes moderate progress afterwards；In sum, anti-rut agent of the present invention is added
Property indices all make moderate progress, and property indices meet according to《Asphalt highway is applied
Work technical specification》(JTG F40-2004) associated specifications.
Traffic of the invention Graphene anti-rut agent fills Graphene as modifier modification pitch,
Because Graphene has amphipathic, hydrophilic to hydrophobic property is presented to center from graphene platelet edge
Matter is distributed, and as interfacial agent generally there are interface, can reduce the energy between interface, and coordinate
Interfacial agent is compounded, and is conducive to anti-rut agent rapid dispersion in asphalt, in Graphene
Under the double action of interfacial agent, accelerate anti-rut agent to disperse in asphalt, reduce
Time needed for mix dispersion, the production efficiency of mixing station is improved, reduce production cost；Meanwhile,
Due to interface interaction, the interface between pitch and mineral aggregate is set to reduce, more conducively the compacting on road surface,
Passage, cracking in reduction pavement spread roller compaction process etc..The present invention has process is simple, energy consumption
The features such as relatively low, environmental protection and good application prospect.
Above content is made for the present invention further detailed with reference to specific preferred embodiment
Explanation, it is impossible to assert that specific implementation of the invention is only limited to these explanations.For skill belonging to the present invention
For the those of ordinary skill in art field, without departing from the inventive concept of the premise, can also do
Go out some simple deduction or replace, should all be considered as belonging to protection scope of the present invention.
Claims (6)
1. a kind of asphalt based on Graphene anti-rut agent, it is characterised in that including ore deposit
Material, Graphene anti-rut agent, pitch and miberal powder, the Graphene anti-rut agent account for the pitch and mix
The 0.2%~0.5% of material weight is closed, the Graphene anti-rut agent is made up of following component：Polyolefin
10~50 parts, thermoplastic elastomer (TPE) vinylaromatic hydrocarbon -3~20 parts of conjugated diene block copolymer,
10~30 parts of Graphene, 1~5 part of interfacial agent, above number is by weight.
2. asphalt according to claim 1, it is characterised in that the polyolefin
For in PE, PP, EVA, APP, APAO, POE, HDPE, LDPE and LLDPE
One or more.
3. asphalt according to claim 1, it is characterised in that the thermoplasticity
Elastomeric ethylene base aromatic hydrocarbon-conjugated diene block copolymer is SBS, SIS, SEBS and SEPS
In one or more.
4. asphalt according to claim 1, it is characterised in that the Graphene
It is one or more in single-layer graphene, bilayer graphene, multi-layer graphene and graphene oxide.
5. asphalt according to claim 1, it is characterised in that live at the interface
Property agent be amphoteric ionic surfactant, the amphoteric ionic surfactant be alkyl imidazole
One or more in quinoline type halide hydrochlorate or alkyl betaine halide hydrochlorate.
6. a kind of pitch based on Graphene anti-rut agent according to claim any one of 1-5
The preparation method of compound, it is characterised in that its step is as follows：
1) mineral aggregate is heated to 170-180 DEG C, and is put into malaxation device；
2) will be equivalent to asphalt weight 0.2%-0.5% anti-rut agent add malaxation device in,
Dry mixing 80s；
3) 165-175 DEG C of pitch is added, continues mix 80s；
4) miberal powder is added to continue mix 90s.
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| CN110791110A (en) * | 2019-11-07 | 2020-02-14 | 江苏路耐德公路养护技术有限公司 | Asphalt adhesion promoter and preparation method thereof |
| CN111433273A (en) * | 2017-11-07 | 2020-07-17 | 伊特奇米卡有限责任公司 | Additive composition for high mechanical property asphalt mixture |
| CN111548638A (en) * | 2020-03-24 | 2020-08-18 | 南京诚开集约建材科技有限公司 | Formula and process of graphene emulsified asphalt |
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