CN104559234B - Asphalt viscosity reducer and asphalt composition - Google Patents
Asphalt viscosity reducer and asphalt composition Download PDFInfo
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- CN104559234B CN104559234B CN201310496030.1A CN201310496030A CN104559234B CN 104559234 B CN104559234 B CN 104559234B CN 201310496030 A CN201310496030 A CN 201310496030A CN 104559234 B CN104559234 B CN 104559234B
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Abstract
The invention discloses asphalt viscosity reducer and asphalt composition. The asphalt viscosity reducer comprises the following components in percentage by weight: 5-30% of an additive A, 1-10% of an additive B, 1-10% of kaloamine and 50-93% of an additive C. The components are uniformly mixed in a proportion, then the asphalt viscosity reducer is obtained, and the asphalt viscosity reducer is mixed with matrix asphalt to obtain the asphalt composition. The asphalt viscosity reducer has a good viscosity reduction function on asphalt, and the asphalt composition with the asphalt viscosity reducer has low high-temperature viscosity, good lubrication performance and good viscosity and ductility at 60 DEG C, meanwhile has the needle penetration and softening point the same as those of the base asphalt, and has the advantages of low production cost, simple and convenient preparation method, wide application range and the like.
Description
Technical field
The present invention relates to a kind of asphalt viscosity reduction agent and the bituminous composition using this thinner.
Background technology
Used in road engineering, asphalt is generally divided into two types according to mixing and stirring construction temperature at present：Cold mixing drips
Blue or green compound CMA (Cold Mix Asphalt) and hot-mix asphalt mixture HMA (Hot Mix Asphalt).Cold-mix asphalt mixes
Close material typically using emulsified asphalt or liquid asphalt with gather materials mix and stir under normal temperature state, making, to gathering materials and need not combine
Material is heated, and so can save mass energy.But cold-mix asphalt compound initial stage pavement performance difference is it is difficult to meet public at a high speed
The requirement of the important engineerings such as road, Heavy Traffic road.Hot-mix asphalt mixture be most widely used, pavement performance the best
A kind of compound.But in hot-mix asphalt mixture production process, pitch is needed in 150 ~ 180 DEG C of hot conditions with building stones
Under mix and stir.Building stones, pitch are heated to so high temperature, consume mass energy.In addition produce in hot-mix asphalt mixture
During create substantial amounts of CO2, flue dust and pernicious gas (CO, SO2、NOxDeng), not only pollute environment, and have impact on
Staff's is healthy.Meanwhile, mixing and stirring under hot conditions also result in the aging of pitch, reduces asphalt
Pavement performance.
For environmental protection, energy saving, in the middle and later periods nineties 20th century Europe and the U.S. etc., country has carried out warm mix drip
The research of blue or green compound WMA (Warm Mix Asphalt), its objective is the temperature of mixing and stirring and pave by reducing asphalt
Degree, reduces the energy consumption in Process of Pitch Mixture Production, reduces CO2Deng gas and dust discharge amount, ensure warm mix simultaneously
Asphalt has the pavement performance essentially identical with hot-mix asphalt mixture and construction workability.
At present, warm mix asphalt technologies mainly have three kinds of modes：One is to add one kind in advance in pitch can drop
The additive of low 135 DEG C of viscosity of pitch, chemically angle to be changing the viscosity-temperature curve of pitch, thus reducing mixing of pitch and building stones
And temperature, but 60 DEG C of viscosity that the method generally also can reduce pitch reduce the high-temperature stability of compound；Two is to adopt
The higher emulsified asphalt of solid content, is mixed and stirred with building stones at a temperature of 80～120 DEG C, and which is low compared with the temperature of hot asphalt by about 30
～50 DEG C；Three is in mixing compound, water and pitch to be simultaneously introduced to mix and stir in tank, and the presence due to water makes asphalt foaming, reaches
To viscosity reducing effect.If but the method amount of water is excessive, substantial amounts of vapor can be produced or causes bumping, if the water yield is very few,
Foaming effect is bad.
CN102311649A discloses a kind of asphalt viscosity reduction modifier and preparation method thereof.The method is by a certain proportion of work
Agent, ammonium fluosilicate, creasote, polyethylene and stearic acid are put in reaction vessel, are warming up to 250 DEG C, are sufficiently stirred for reacting
Obtain asphalt viscosity reduction modifier.With creasote as medium, at high temperature, ammonium fluosilicate is reacted the method with stearic acid, raw
Become a kind of new compound, this compound plays viscosity reduction effect to pitch, can reduce construction temperature, can significantly improve drip simultaneously
Blue or green coagulation soil compaction, improves the high-temperature behavior of pitch.But ammonium fluosilicate itself is poisonous, there is strong and stimulating, high temperature easily decomposes
Give off poisonous gas, and react at high temperature with stearic acid, release poisonous corrosive fume.
CN102532920A discloses a kind of Warm mixed asphalt cement and preparation method thereof.The method is will be a certain proportion of
Bituminous cements is heated to 130～160 DEG C, adds a certain proportion of rheology modifier, stirs；Again by high molecular polymer
It is dividedly in some parts mixed system, shearing, stirring, until polymer beads are evenly distributed on ＜ 100 micrometer range, is to slowly warm up to 170
～180 DEG C, stirring reaction takes the dish out of the pot for 1～2 hour.The method can improve the high temperature rut of bituminous cements, low temperature stretch-proof and
Resistance to embrittlement performance, and under the conditions of 110～135 DEG C, there is relatively low viscosity, still can have good under reducing construction temperature
Good mix, pave, compaction capacity.But needs repeatedly charging, stirring and the intensification when preparing Warm mixed asphalt cement, and mixing
Need 1～2 hour long agitation during conjunction, be difficult in industrial production make polymer beads control in ＜ 100 micrometer range, preparation
Method is complicated, and production cost is high, needs to carry out scrap build and changes production procedure, the production process cycle longer it is impossible to adapt to
The needs that scene paves amplify and apply it is difficult to realize industry.
CN101781468A discloses a kind of modified asphalt viscosity decreasing agent and preparation method thereof.The method is that compatilizer exists
After being dehydrated at 100～120 DEG C, add organic acid, surfactant and synthesis paraffin, the screw rod being 80～100 DEG C in temperature squeezes
Go out in machine to be blended, extrude, granulating, cooling obtains asphalt viscosity reduction agent.This thinner can reduce by 175 DEG C of viscosity of modified pitch；Should
Synthesis paraffin in thinner belongs to non-elastic material, under cryogenic easily brittle failure, thus leading to the low of asphalt
Warm stretch-proof and the hydraulic performance decline of resistance to embrittlement, and organic wax of most of low melting point, while reducing asphalt high-temperature viscosity, also drops
Low 60 DEG C of viscosity, reduce anti-rut behavior.
Content of the invention
For the deficiencies in the prior art, the invention provides a kind of asphalt viscosity reduction agent and bituminous composition.The drip of the present invention
Blue or green thinner has preferable viscosity reduction effect to pitch, and the bituminous composition of interpolation thinner of the present invention has relatively low high temperature and glues
Degree and preferable lubricity, 60 DEG C of higher viscosity and ductility, have the needle penetration suitable with matrix pitch and softening point simultaneously,
There is low production cost, preparation method is simple and the advantages of have wide range of applications.
The asphalt viscosity reduction agent of the present invention, by weight percentage, including following component：
Additive A：5wt%～30wt%；
Additive B：1wt%～10wt%；
Carlow amine：1wt%～10wt%；
Addition of C：50wt%～93wt%；
The asphalt viscosity reduction agent of the present invention, preferably constitute by weight percentage including：
Additive A：10wt%～20wt%；
Additive B：2wt%～5wt%；
Carlow amine：2wt%～5wt%
Addition of C：70wt%～86wt%；
Described additive A, fusing point between 60～130 DEG C, including：Tissuemat E, microwax, lignite wax,
Sasobit, sulphur, stearic acid, arachic acid, lignoceric acid etc. and its one or more of derivative, preferably polyethylene
Wax and/or stearic acid.
Described additive B is high molecular component, including PEO-expoxy propane, phenolic resin, polyacrylic acid
One or more of ester, amino resins, polyethers, polyvinyl alcohol and its partial esterification or acetalation product, preferably polyacrylic acid
Ester and/or amino resins, molecular weight is all 1000～30000, preferably 2000 ~ 20000.
Described addition of C be low-molecular-weight component, including fatty acid distribution of coconut oil diglycollic amide, AEO,
APES, polyoxyethylene carboxylate, alkylolamides APEO, Block polyoxyethylene-polyoxypropylene
Ether, alkyl polyglycoside, polyalcohol stearate, Span, fatty acid ethylene oxide condensate, castor oil polyoxyethylene
One or more of the esterification of ether, polyethylene glycol dioleic acid ester and Spans series and Tweens series and etherification product, excellent
Select one or more of AEO, alkylolamides APEO and fatty acid distribution of coconut oil diglycollic amide,
Its molecular weight is all below 1000.
In asphalt viscosity reduction agent of the present invention, can need to add organic additive according to practical application, including diazoacetic acid second
Ester, azodicarbonamide, N, N- dinitrosopentamethlyene tetramine and azodiisobutyronitrile etc..
It is also possible to need to add other modifying agent according to practical application in asphalt viscosity reduction agent of the present invention, such as antistripping agent, anti-
Aging dose, antioxidant, dispersant, stabilizer, polymer modifiers etc..
The preparation method of the asphalt viscosity reduction agent of the present invention, including following content：By proportioning by additive A, additive B, card
Lip river amine and addition of C are separately added into reaction vessel, mix, and make asphalt viscosity reduction agent；Wherein mixing temperature is 60～130
DEG C, by higher than or close to the fusing point of used additive component or softening point, incorporation time is 20～30 minutes, mixed process
Using conventional mechanical agitation.
The bituminous composition of the present invention, including matrix pitch and above-mentioned asphalt viscosity reduction agent, on the basis of matrix pitch weight,
Thinner is the 0.1wt%～5wt%, preferably 0.5wt%～3wt% of matrix pitch.
In bituminous composition of the present invention, described matrix pitch is in straight asphalt, oxidized asphalt and solvent deoiling pitch
One or more, its needle penetration be 60～120 1/10mm.
The preparation method of the bituminous composition of the present invention, including following content：By proportioning, above-mentioned asphalt viscosity reduction agent is added
To in matrix pitch, mix, obtain bituminous composition；Wherein mixing temperature be 130～150 DEG C, incorporation time be 30～
60 minutes；Mixed process adopts general mechanical agitation mode, it would however also be possible to employ the technological means such as ultrasonic, microwave or high shear.
Application in urban road laying, maintenance and building for the bituminous composition of the present invention, particularly mixed in road asphalt
Close during material mixes and stirs and have broad application prospects.
Application in asphalt for the bituminous composition of the present invention, including following content：Mix and stir temperature when building stones reach
Degree, adds bituminous composition uniform mixing in compound.
The bituminous composition of the present invention is compared with traditional hot asphalt, has advantages below：
（1）In bituminous composition of the present invention, each component, when 120～165 DEG C, has good compatibility and mobility,
All there are more apparent viscosity reduction effect, four kinds of component synergies to matrix pitch, dispersion effect is good, good stability can play bright
Aobvious " lubrication " effect, can be effectively improved the construction workability of asphalt.
（2）In bituminous composition of the present invention, the synergy of each component also produces following beneficial effect：When additive A exists
When being individually present under cryogenic conditions, it is present in pitch with not homogeneous crystalline state, with the physicochemical property difference of matrix pitch relatively
Greatly, compatibility is bad, while reducing asphalt high-temperature viscosity, also reduces its 60 DEG C of viscosity, reduces anti-rut behavior.When
Add additive B（High molecular component）And addition of C（Low-molecular-weight component）, due to its good mobility and compatibility, stir
When can be dispersed by heterogeneous crystallization, the macromolecular in additive B and pitch by this lubrication crystal grain parcel and mutually twine
Around, the more stable colloidal dispersion with spacial framework of formation, improves its 60 DEG C of viscosity, improves high temperature rutting resistance.
Carlow amine and other three kinds of components synergies, can play solubilising, stable, viscosity reduction and lubricant effect, and Carlow amine contributes to
Increase the adhesion of pitch and building stones.
（3）Bituminous composition of the present invention, has lower high temperature viscosity and more preferable lubricity, therefore can reduce pitch
The the mixing and stirring, pave and compacting temperature of compound, it mixes and stirs temperature and can reduce by 15 ~ 30 DEG C by ratio hot asphalt, and reducing energy consumption is about
30%, a large amount of reduce mix and stir and work progress in smog and discharge of poisonous waste, reduce to harm and environmental pollution.
（4）Bituminous composition of the present invention, while effective reduction high temperature viscosity, can keep 60 DEG C of higher viscosity,
The cohesive force of building stones, stone flour and pitch can be increased well, improve the stripper-resistance of compound, can effectively prevent big traffic
The Rutting damage of bituminous paving under the conditions of amount and Heavy Traffic.
（5）Bituminous composition of the present invention, has higher ductility compared with matrix pitch, and plasticity is good, good stability, do not occur from
Analysis, effectively improves low-temperature resistance cracking and the chronic fatigue performance of asphalt.
（6）Bituminous composition of the present invention, has the needle penetration suitable with hot asphalt and softening point, and ageing property obtains simultaneously
To improvement, effective prolonging service life of pavement.Apply this warm-mixed asphalt to prepare asphalt, mix and stir and forming temperature relatively
In the case that hot-mix asphalt mixture substantially reduces by 15～30 DEG C, its compound properties is suitable with hot asphalt.
（7）Bituminous composition of the present invention, raw material is simple, low production cost, preparation method is simple, only needs simply machinery to stir
Mix, environmental friendliness little to the excitant of human body, environmental protection, when being applied to asphalt, in addition need not add warm-mixing agent,
Scrap build need not be carried out in industrial production and change production procedure, be suitable to industry and amplify and apply.
Specific embodiment
With reference to embodiment, the present invention is further illustrated, but is not so limited the present invention.
Embodiment 1
Asphalt viscosity reduction agent material quality percentage is：
Tissuemat E：6.5wt%；
Amino resins：2wt%；
Carlow amine：3.7wt%；
Fatty acid distribution of coconut oil diglycollic amide：87.8wt%；
By proportioning, Tissuemat E, amino resins, Carlow amine and fatty acid distribution of coconut oil diglycollic amide are separately added into reaction to hold
Device, stirring is warming up to 105 DEG C, and mixing time is 30min, makes asphalt viscosity reduction agent；By weight percentage, by matrix pitch
0.5wt% is added in matrix pitch, and mixing temperature is 147 DEG C, and mixing time is 50min, obtains bituminous composition.
Embodiment 2
Asphalt viscosity reduction agent material quality percentage is：
Microwax：14.2wt%；
Polyacrylate：3.6wt%；
Carlow amine：1.5wt%；
Polyoxyethylene carboxylate：80.7wt%；
By proportioning, microwax, polyacrylate, Carlow amine and polyoxyethylene carboxylate are separately added into reaction vessel, stir
Mix and be warming up to 85 DEG C, mixing time is 20min, makes asphalt viscosity reduction agent；By weight percentage, will by the 3wt% of matrix pitch
It is added in matrix pitch, and mixing temperature is 140 DEG C, and mixing time is 45min, obtains bituminous composition.
Embodiment 3
Asphalt viscosity reduction agent material quality percentage is：
Stearic acid：26wt%；
Phenolic resin：4.3wt%；
Carlow amine：2.5wt%；
APES：67.2wt%；
By proportioning, stearic acid, phenolic resin, Carlow amine and APES are separately added into reaction vessel, stirring
It is warming up to 100 DEG C, mixing time is 25min, makes asphalt viscosity reduction agent；By weight percentage, by the 4.5wt% of matrix pitch
It is added in matrix pitch, mixing temperature is 135 DEG C, mixing time is 35min, obtains bituminous composition.
Comparative example 1
Asphalt viscosity reduction agent material quality percentage is：
Phenolic resin：4wt%；
Carlow amine：4.5wt%；
Alkylolamides APEO：91.5wt%；
By proportioning, phenolic resin, Carlow amine and alkylolamides APEO are separately added into reaction vessel, stirring rises
To 95 DEG C, mixing time is 25min to temperature, makes asphalt viscosity reduction agent；By weight percentage, added by the 4wt% of matrix pitch
It is added in matrix pitch, mixing temperature is 142 DEG C, mixing time is 40min, obtains bituminous composition.
Comparative example 2
Asphalt viscosity reduction agent material quality percentage is：
Sulphur：17.4wt%；
Carlow amine：1.5wt%；
Span：81.1wt%；
By proportioning, sulphur, Carlow amine and Span are separately added into reaction vessel, stirring is warming up to 72 DEG C, stirs
Time of mixing is 30min, makes asphalt viscosity reduction agent；By weight percentage, it is added to matrix drip by the 2wt% of matrix pitch
In green grass or young crops, mixing temperature is 145 DEG C, and mixing time is 45min, obtains bituminous composition.
Embodiment 4
According to《Standard specification for construction and acceptance of highway asphalt pavement》（JTG F40-2004）The method of regulation, by embodiment 1,2,3
Carry out compound with the bituminous composition in comparative example 1,2 to mix and stir, be prepared into compound test specimen A, B, C, D, E.This test oilstone
Than（Bituminous composition accounts for the percentage of mixture quality）For 5.2%, bituminous composition is shown in Table with No. 70 asphaltic nature test results
1, mixture performance evaluation result is shown in Table 2.
Table 1 bituminous composition and No. 70 asphaltic natures.
| Project | No. 70 pitches | Embodiment 1 | Embodiment 2 | Embodiment 3 | Comparative example 1 | Comparative example 2 |
| 25 DEG C of needle penetration/0.1mm | 73 | 74 | 79 | 77 | 95 | 104 |
| Softening point/DEG C | 48.3 | 46.2 | 46.0 | 46.9 | 44.7 | 42.5 |
| 10 DEG C of ductility/cm | 76 | 122 | 131 | 135 | 123 | >150 |
| 60 DEG C of viscosity/Pa s | 220.2 | 193.0 | 198.1 | 185.4 | 124.0 | 116.8 |
| Isolation property | ||||||
| Softening point difference（48h）/℃ | 0.2 | 0.3 | 0.3 | 0.3 | 1.1 | 0.6 |
| Rotary viscosity/mPa s | ||||||
| 120℃ | 1034.0 | 762.0 | 783.0 | 807.5 | 783.0 | 760.5 |
| 135℃ | 450.0 | 335.0 | 347.5 | 326.0 | 360.5 | 339.0 |
| 150℃ | 228.5 | 152.0 | 160.5 | 150.0 | 156.0 | 148.5 |
| 165℃ | 128.0 | 93.0 | 94.0 | 91.0 | 101.5 | 90.5 |
| After TFOT | ||||||
| Mass change/% | +0.046 | -0.606 | -0.518 | -0.703 | -0.454 | -0.937 |
| Penetration ratio/% | 64 | 81 | 83 | 86 | 73 | 88 |
| 10 DEG C of ductility/cm | 8.5 | 68 | 75 | 62 | 59 | 37 |
| Softening point | 51.8 | 48.6 | 48.2 | 48.0 | 46.2 | 44.9 |
Table 2 bituminous composition mixture performance test result.
| Project | Mix and stir temperature/DEG C | Forming temperature/DEG C | Stability/kN | Residual stability ratio（%） | Retained strength ratio（%） | Dynamic stability（Secondary/mm） |
| Heat is mixed | 150 | 140 | 10.8 | 88.4 | 84.9 | 1450 |
| A | 130 | 110 | 9.3 | 85.1 | 83.2 | 1309 |
| B | 130 | 110 | 9.4 | 86.2 | 80.7 | 1211 |
| C | 130 | 115 | 10.0 | 89.0 | 85.9 | 1274 |
| D | 130 | 110 | 8.4 | 83.5 | 77.3 | 833 |
| E | 130 | 110 | 8.2 | 78.3 | 79.1 | 906 |
| Technical standard * | -- | -- | ≥8 | ≥80 | ≥75 | ≥1000 |
Test data shows, the bituminous composition adding asphalt viscosity reduction agent of the present invention has relatively low high temperature viscosity, permissible
Effectively reduce mixing and stirring, paving and compacting temperature of asphalt；Bituminous composition of the present invention can keep higher 60 DEG C to glue
Degree, after having higher ductility and the needle penetration suitable compared with No. 70 pitch and softening point, and its film, ageing property also obtains simultaneously
Improve.Apply this bituminous composition to prepare asphalt, it is possible to achieve mix and stir and forming temperature with respect to hot asphalt mix
In the case of closing 20～30 DEG C of the obvious reduction of material, property indices are satisfied by《Standard specification for construction and acceptance of highway asphalt pavement》（JTG
F40-2004）Requirement.
Claims (13)
1. a kind of asphalt viscosity reduction agent it is characterised in that：By weight percentage, including following component：
Additive A：5wt%～30wt%；
Additive B：1wt%～10wt%；
Carlow amine：1wt%～10wt%；
Addition of C：50wt%～93wt%；
Wherein, described additive A, fusing point between 60～130 DEG C, including Tissuemat E, microwax, lignite wax,
One or more of sasobit, sulphur, stearic acid, arachic acid or lignoceric acid；
Described additive B is high molecular component, including PEO-expoxy propane, phenolic resin, polyacrylate, ammonia
Base resin, polyethers, polyvinyl alcohol and one or more of polyvinyl alcohol partial esterification or acetalation product；
Described addition of C is low-molecular-weight component, including fatty acid distribution of coconut oil diglycollic amide, AEO, alkyl
Phenol polyethenoxy ether, polyoxyethylene carboxylate, alkylolamides APEO, Block polyoxyethylene-polyethenoxy ether, alkane
Quito glycosides, polyalcohol stearate, Span, fatty acid ethylene oxide condensate, castor oil polyoxyethylene ether, poly-
One or more of the esterification of ethylene glycol dioleic acid ester and Spans series and Tweens series and etherification product.
2. according to the asphalt viscosity reduction agent described in claim 1 it is characterised in that：Preferably constitute by weight percentage including：
Additive A：10wt%～20wt%；
Additive B：2wt%～5wt%；
Carlow amine：2wt%～5wt%；
Addition of C：70wt%～86wt%.
3. according to the asphalt viscosity reduction agent described in claim 1 or 2 it is characterised in that：Described additive A be Tissuemat E and/
Or stearic acid.
4. according to the asphalt viscosity reduction agent described in claim 1 or 2 it is characterised in that：Described additive B for high molecular component is
Polyacrylate and/or amino resins.
5. according to the asphalt viscosity reduction agent described in claim 1 or 2 it is characterised in that：Described addition of C for low-molecular-weight component is
One or more of AEO, alkylolamides APEO and fatty acid distribution of coconut oil diglycollic amide.
6. according to the asphalt viscosity reduction agent described in claim 1 or 2 it is characterised in that：Organic additive is added in asphalt viscosity reduction agent,
Including ethyl diazoacetate, azodicarbonamide, N, one of N- dinitrosopentamethlyene tetramine and azodiisobutyronitrile
Or it is several.
7. a kind of preparation method of the asphalt viscosity reduction agent described in claim 1 or 2 is it is characterised in that include following content：By joining
It is separately added into reaction vessel than by additive A, additive B, Carlow amine and addition of C, mixes, make asphalt viscosity reduction agent.
8. in accordance with the method for claim 7 it is characterised in that：Mixing temperature is 60～130 DEG C, and incorporation time is 20～30
Minute, mixed process is using conventional mechanical agitation.
9. a kind of described in claim 1 or 2 asphalt viscosity reduction agent preparation bituminous composition it is characterised in that：Including matrix
Pitch and asphalt viscosity reduction agent, on the basis of matrix pitch weight, thinner is the 0.1wt%～5wt% of matrix pitch.
10. according to the bituminous composition described in claim 9 it is characterised in that：Described matrix pitch is straight asphalt, oxidation
One or more of pitch and solvent deoiling pitch, its needle penetration is 60～120 1/10mm.
The preparation method of the bituminous composition described in a kind of 11. claims 9, including following content：By proportioning by asphalt viscosity reduction
Agent is added in matrix pitch, mixes, and obtains bituminous composition.
12. in accordance with the method for claim 11 it is characterised in that：Mixing temperature is 130～150 DEG C, and incorporation time is 30
～60 minutes；Mixed process adopts the combination of one or more of mechanical agitation, ultrasonic, microwave or high shear technological means.
The application in urban road laying, maintenance and building of the bituminous composition described in a kind of 13. claims 9.
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