CN104559245A - Warm mix asphalt and preparation method thereof - Google Patents
Warm mix asphalt and preparation method thereof Download PDFInfo
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- CN104559245A CN104559245A CN201310496390.1A CN201310496390A CN104559245A CN 104559245 A CN104559245 A CN 104559245A CN 201310496390 A CN201310496390 A CN 201310496390A CN 104559245 A CN104559245 A CN 104559245A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
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Abstract
The invention discloses warm mix asphalt and a preparation method thereof. The warm mix asphalt comprises the following raw materials in percentage by weight: 0.1-10 percent of stearic acid, 0.1-10 percent of cocoanut oil fatty acid diethanolamide, and 80-99.8 percent of matrix asphalt. The preparation method for the warm mix asphalt comprises the following steps: respectively adding the stearic acid and cocoanut oil fatty acid diethanolamide in a reaction vessel according to a ratio, uniformly mixing, adding the mixture in the matrix asphalt according to a ratio, and uniformly mixing to prepare the warm mix asphalt. The warm mix asphalt is environment-friendly, and has a good application prospect in mix asphalt mixing.
Description
Technical field
The present invention relates to a kind of road bitumen and preparation method thereof, particularly relate to a kind of warm-mixed asphalt and preparation method thereof.
Background technology
The asphalt used in current road engineering is generally divided into two types according to mixing and stirring construction temperature: cold-mix asphalt compound CMA (Cold Mix Asphalt) and hot-mix asphalt mixture HMA (Hot Mix Asphalt).Cold-mix asphalt compound generally adopt emulsified bitumen or eu-bitumen and gather materials to mix and stir under normal temperature state, making, without the need to to gather materials and binder heats, can mass energy be saved like this.But cold-mix asphalt compound initial stage pavement performance is poor, be difficult to the requirement meeting the important engineering such as motorway, Heavy Traffic road.Hot-mix asphalt mixture be most widely used, a kind of compound that pavement performance is the best.But in hot-mix asphalt mixture production process, pitch and building stones need to mix and stir under 150 ~ 180 DEG C of hot conditionss.By building stones, asphalt heating to so high temperature, consume mass energy.A large amount of CO is created in addition in hot-mix asphalt mixture production process
2, flue dust and obnoxious flavour (CO, SO
2, NO
xdeng), not only pollute environment, and have impact on the healthy of staff.Meanwhile, mixing and stirring under hot conditions also result in the aging of pitch, reduces the pavement performance of asphalt.
For protection of the environment, save energy; the research of Warm-Mix Bitumen Mixture WMA (Warm Mix Asphalt) has been carried out in countries such as the middle and later periods nineties 20th century Europe and the U.S.; its objective is by reducing mixing and stirring and paving material of asphalt; reach the energy consumption reduced in Process of Pitch Mixture Production, reduce CO
2deng gas and dust discharge amount, ensure that Warm-Mix Bitumen Mixture has the pavement performance substantially identical with hot-mix asphalt mixture and construction workability simultaneously.
At present, warm mix asphalt technologies mainly contains three kinds of modes: one is in pitch, add a kind of additive that can reduce pitch 135 DEG C of viscosity in advance, chemically angle changes the viscosity-temperature curve of pitch, thus reduce pitch and building stones mix and stir temperature, but namely 60 DEG C of viscosity that this method also can reduce pitch usually reduce the high-temperature stability of compound; Two is the emulsified bitumens adopting solid content higher, and mix and stir with building stones at 80 ~ 120 DEG C of temperature, which is low compared with the temperature of hot asphalt about 30 ~ 50 DEG C; Three is when mixing compound, water and pitch are added simultaneously to mix and stir in tank, because the existence of water makes asphalt foaming, reaches viscosity reducing effect.If but the method amount of water is excessive, then can produce a large amount of water vapour or cause bumping, if the water yield is very few, then foaming effect is bad.
CN102311649A discloses a kind of asphalt viscosity reduction modifier and preparation method thereof.A certain proportion of activator, ammonium silicofluoride, creosote, polyethylene and stearic acid are put in reaction vessel by the method, are warming up to 250 DEG C, and abundant stirring reaction obtains asphalt viscosity reduction modifier.The method take creosote as medium, and at high temperature, ammonium silicofluoride and stearic acid react, generate a kind of new compound, this compound plays viscosity reduction effect to pitch, can reduce construction temperature, bituminous concrete compactness can be significantly improved simultaneously, improve the high-temperature behavior of pitch.But ammonium silicofluoride itself is poisonous, has strong and stimulating, high temperature easily decomposes and give off poisonous gas, and at high temperature reacts with stearic acid, releases poisonous corrosive fume.
CN102532920A discloses a kind of Warm mixed asphalt cement and preparation method thereof.The method is that a certain proportion of bituminous cements is heated to 130 ~ 160 DEG C, adds a certain proportion of rheology modifier, stirs; Again high molecular polymer is added mixed system in batches, shear, stir until polymer beads is evenly distributed on < 100 micrometer range, be slowly warming 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 has lower viscosity under 110 ~ 135 DEG C of conditions, can still have good mix, pave, compaction capacity under reduction construction temperature.But need when preparing Warm mixed asphalt cement repeatedly to feed in raw material, stir and heat up, and need stir for a long time for 1 ~ 2 hour when mix, be difficult in industrial production make polymer beads control at < 100 micrometer range, preparation method is complicated, production cost is high, needs carry out scrap build and change Production Flow Chart, and the production process cycle is longer, the needs that scene paves cannot be adapted to, be difficult to realize industry and amplify and application.
CN101781468A discloses a kind of modified asphalt viscosity decreasing agent and preparation method thereof.The method, after being dewatered at 100 ~ 120 DEG C by compatilizer, adds organic acid, tensio-active agent and synthesis paraffin, in temperature be blended in the screw extrusion press of 80 ~ 100 DEG C, extrude, granulation, cooling obtain asphalt viscosity reduction agent.This viscosity-depression agent can reduce modifying asphalt 175 DEG C of viscosity; Synthesis paraffin in this viscosity-depression agent belongs to non-elastic material, easily brittle failure under cryogenic, thus cause the low temperature stretch-proof of asphalt and resistance to embrittlement degradation, and organic wax of most of low melting point is while reduction asphalt high-temperature viscosity, also reduce 60 DEG C of viscosity, reduce anti-rut behavior.
Summary of the invention
For the deficiencies in the prior art, the invention provides a kind of warm-mixed asphalt and preparation method thereof.Warm-mixed asphalt of the present invention has lower high temperature viscosity and good oilness, 60 DEG C of higher viscosity and ductility, the advantages such as have the penetration degree suitable with hot asphalt and softening temperature, production cost is low simultaneously, and preparation method is easy and have wide range of applications.
Warm-mixed asphalt of the present invention, comprises by weight percentage:
Stearic acid: 0.1wt% ~ 10wt%;
Cocoanut fatty acid diethanolamide: 0.1wt% ~ 10wt%;
Matrix pitch: 80wt% ~ 99.8wt%.
Warm-mixed asphalt of the present invention, preferably composition comprises by weight percentage:
Stearic acid: 2wt% ~ 5wt%
Cocoanut fatty acid diethanolamide: 2wt% ~ 5wt%
Matrix pitch: 90wt% ~ 96wt%.
In warm-mixed asphalt of the present invention, described matrix pitch is one or more in straight-run pitch, oxidized bitumen and solvent deoiling pitch, and its penetration degree is 60 ~ 120 1/10mm.
In warm-mixed asphalt of the present invention, can need to add organic additive according to practical application, comprise ethyl diazoacetate, alkyl ethoxylated carboxylic acid sodium, Cellmic C 121, N, N-dinitrosopentamethlyene tetramine and Diisopropyl azodicarboxylate, polyethylene oxide-propylene oxide, water soluble phenol resin, polyacrylic ester, aminoresin, polyethers, polyvinyl alcohol, fatty alcohol-polyoxyethylene ether, alkylphenol polyoxyethylene, polyoxyethylene carboxylate, alkylol amide Soxylat A 25-7, Block polyoxyethylene-polyethenoxy ether, alkyl polyglycoside, polyvalent alcohol stearate, Span, fatty acid ethylene oxide condensate, castor oil polyoxyethylene ether, one or more in polyoxyethylene glycol dioleic acid ester and Spans series and the esterification of Tweens series and etherification product.
In warm-mixed asphalt of the present invention, also can need to add other properties-correcting agent according to practical application, as antistripping agent, antiaging agent, antioxidant, dispersion agent, stablizer, polymer modifiers etc.
The preparation method of warm-mixed asphalt of the present invention, comprises following content:
(1) by proportioning, stearic acid, cocoanut fatty acid diethanolamide are added reaction vessel respectively, mix; (2) by proportioning, the mixture in step (1) is added in matrix pitch, make warm-mixed asphalt; Mixing temperature wherein in step (1) is 60 ~ 90 DEG C, and mixing time is 20 ~ 30 minutes, and the mixing temperature in step (2) is 130 ~ 150 DEG C, and mixing time is 30 ~ 60 minutes; Mixing process adopts general mechanical stirring mode, also can adopt ultrasonic, the technique means such as microwave or high-shear.
The application of warm-mixed asphalt of the present invention in asphalt, comprises content: mix and stir temperature when building stones reach, and adds uniform mixing in warm-mixed asphalt to asphalt.
Warm-mixed asphalt of the present invention compares with traditional hot asphalt, has the following advantages:
(1) in warm-mixed asphalt of the present invention, stearic acid and cocoanut fatty acid diethanolamide are 120 ~ 165 DEG C time, there is good consistency and mobility, viscosity reduction effect is all had to matrix pitch, the two synergy, dispersion effect is good, good stability, significantly " lubrication " effect can be played, effectively can improve the construction workability of asphalt.
(2) in warm-mixed asphalt of the present invention, the synergy of each component also produces following beneficial effect: when stearic acid under cryogenic Individual existence time, be present in pitch with not homogeneous phase crystalline state, larger with the physico-chemical property difference of matrix pitch, consistency is bad, while reduction asphalt high-temperature viscosity, also reduce its 60 DEG C of viscosity, reduce anti-rut behavior.When adding cocoanut fatty acid diethanolamide, the mobility good due to it and the consistency good with matrix pitch, can by dispersed for the stearic acid of heterogeneous crystalline state during stirring, stearic crystal grain is wrapped to form the more stable colloidal dispersion with spacial framework by the macromole in pitch, improve its 60 DEG C of viscosity, improve high temperature rutting resistance.
(3) warm-mixed asphalt of the present invention, there is lower high temperature viscosity and better oilness, therefore can reduce the mixing and stirring of asphalt, pave and compacting temperature, it mixes and stirs temperature can reduce by 15 ~ 30 DEG C than hot asphalt, reduce energy consumption about 30%, a large amount of minimizing is mixed and stirred and smog in construction process and discharge of poisonous waste, reduces harm and environmental pollution.
(4) warm-mixed asphalt of the present invention, while effectively reducing high temperature viscosity, 60 DEG C of higher viscosity can be kept, the cohesive force of building stones, stone flour and pitch can be increased well, improve the stripper-resistance of compound, effectively can prevent the Rutting damage of bituminous pavement under heavy traffic and Heavy Traffic condition.
(5) warm-mixed asphalt of the present invention, has higher ductility compared with matrix pitch, and plasticity is good, and good stability is not emanated, and effectively improves anti-cold cracking and the chronic fatigue performance of asphalt.
(6) warm-mixed asphalt of the present invention, has the penetration degree suitable with hot asphalt and softening temperature, and ageing property improves simultaneously, effective prolonging service life of pavement.Apply this warm-mixed asphalt and prepare asphalt, when mixing and stirring and mold temperature obviously reduces by 15 ~ 30 DEG C relative to hot-mix asphalt mixture, its compound properties is suitable with hot asphalt.
(7) warm-mixed asphalt of the present invention, raw material is simple, and production cost is low, and preparation method is easy, only need simple mechanical stirring, little to the pungency of human body, environmental friendliness, environmental protection, when being applied to asphalt, without the need to adding warm-mixing agent in addition, without the need to carrying out scrap build and changing Production Flow Chart in industrial production, being suitable for industry and amplifying and application.
Embodiment
Below in conjunction with embodiment, the present invention is further illustrated, but therefore do not limit the present invention.
Embodiment 1
Warm-mixed asphalt raw materials quality per-cent is:
Stearic acid: 0.5%;
Cocoanut fatty acid diethanolamide: 7.5%;
Matrix pitch: 92.0%.
By proportioning, stearic acid, cocoanut fatty acid diethanolamide are added reaction vessel respectively, stir and be warming up to 65 DEG C, churning time is 30min, added in matrix pitch by proportioning again, mixing temperature is 147 DEG C, and churning time is 50min, makes warm-mixed asphalt.
Embodiment 2
Warm-mixed asphalt raw materials quality per-cent is:
Stearic acid: 7.2%;
Cocoanut fatty acid diethanolamide: 2.5%;
Matrix pitch: 90.3%.
By proportioning, stearic acid, cocoanut fatty acid diethanolamide are added reaction vessel respectively, stir and be warming up to 70 DEG C, churning time is 20min, added in matrix pitch by proportioning again, mixing temperature is 140 DEG C, and churning time is 45min, makes warm-mixed asphalt.
Embodiment 3
Warm-mixed asphalt raw materials quality per-cent is:
Stearic acid: 3.6%;
Cocoanut fatty acid diethanolamide: 1.2%;
Matrix pitch: 95.2%.
By proportioning, stearic acid, cocoanut fatty acid diethanolamide are added reaction vessel respectively, stir and be warming up to 85 DEG C, churning time is 25min, added in matrix pitch by proportioning again, mixing temperature is 135 DEG C, and churning time is 35min, makes warm-mixed asphalt.
Comparative example 1
Warm-mixed asphalt raw materials quality per-cent is:
Stearic acid: 3.2%;
Matrix pitch: 96.8%.
Add in matrix pitch by proportioning by stearic acid, mixing temperature is 142 DEG C, and churning time is 40min, makes warm-mixed asphalt.
Comparative example 2
Warm-mixed asphalt raw materials quality per-cent is:
Cocoanut fatty acid diethanolamide: 6.0%;
Matrix pitch: 94.0%.
Add in matrix pitch by proportioning by cocoanut fatty acid diethanolamide, mixing temperature is 145 DEG C, and churning time is 45min, makes warm-mixed asphalt.
Warm-mixed asphalt and No. 70 asphaltic nature test results are in table 1.
| Project | No. 70 pitches | Embodiment 1 | Embodiment 2 | Embodiment 3 | Comparative example 1 | Comparative example 2 |
| 25 DEG C of penetration degree/0.1mm | 73 | 84 | 78 | 79 | 126 | 95 |
| Softening temperature/DEG C | 48.3 | 46.5 | 46.2 | 47.3 | 42.1 | 45.7 |
| 10 DEG C of ductility/cm | 76 | 139 | 141 | 130 | >150 | 113 |
| 60 DEG C of viscosity/Pas | 220.2 | 187.4 | 192.6 | 203.1 | 103.0 | 147.1 |
| Segregation character | ||||||
| Upper strata softening temperature/DEG C | 48.0 | 46.2 | 46.0 | 47.2 | 47.1 | 47.0 |
| Lower floor's softening temperature/DEG C | 47.8 | 46.4 | 45.8 | 47.5 | 47.9 | 48.6 |
| Softening point difference (48h)/DEG C | 0.2 | 0.2 | 0.2 | 0.3 | 0.8 | 1.6 |
| Rotary viscosity/mPas | ||||||
| 120℃ | 1034.0 | 787.0 | 796.5 | 813.0 | 740.0 | 797.0 |
| 135℃ | 450.0 | 340.0 | 354.0 | 337.0 | 341.5 | 352.5 |
| 150℃ | 228.5 | 169.0 | 156.0 | 162.0 | 178.5 | 177.0 |
| 165℃ | 128.0 | 95.5 | 93.5 | 98.5 | 102.5 | 100.0 |
| After TFOT | ||||||
| Quality change/% | +0.046 | -0.725 | -0.622 | -0.707 | -0.367 | -1.043 |
| Penetration ratio/% | 64 | 87 | 85 | 82 | 62 | 84 |
| 10 DEG C of ductility/cm | 8.5 | 81 | 71 | 69 | 64 | 39 |
| Softening temperature | 51.8 | 47.7 | 48.6 | 47.2 | 48.2 | 48.5 |
Testing data shows, warm-mixed asphalt of the present invention has lower high temperature viscosity, effectively can reduce the mixing and stirring of asphalt, pave and compacting temperature 15 ~ 30 DEG C; Warm-mixed asphalt of the present invention can keep 60 DEG C of higher viscosity, have higher ductility and the penetration degree suitable compared with No. 70 pitch and softening temperature, and after its film, ageing property also improves simultaneously.Therefore apply this warm-mixed asphalt and prepare asphalt, can be implemented in mix and stir and mold temperature obviously reduces relative to hot-mix asphalt mixture when, its compound properties is suitable with hot asphalt.When being applied to asphalt, can directly use warm-mixed asphalt of the present invention, without the need to adding warm-mixing agent in addition, without the need to carrying out scrap build and changing Production Flow Chart in industrial production, being suitable for industry and amplifying and application.
Claims (8)
1. a warm-mixed asphalt, is characterized in that: comprise by weight percentage: stearic acid: 0.1wt% ~ 10wt%, cocoanut fatty acid diethanolamide: 0.1wt% ~ 10wt%, matrix pitch: 80wt% ~ 99.8wt%.
2. according to warm-mixed asphalt according to claim 1, it is characterized in that: composition comprises by weight percentage: stearic acid: 2wt% ~ 5wt%, cocoanut fatty acid diethanolamide: 2wt% ~ 5wt%, matrix pitch: 90wt% ~ 96wt%.
3. according to the warm-mixed asphalt described in claim 1 or 2, it is characterized in that: described matrix pitch is one or more in straight-run pitch, oxidized bitumen and solvent deoiling pitch, and penetration degree is 60 ~ 120 1/10mm.
4. according to the warm-mixed asphalt described in claim 1 or 2, it is characterized in that: in warm-mixed asphalt, add organic additive, be selected from ethyl diazoacetate, alkyl ethoxylated carboxylic acid sodium, Cellmic C 121, N, N-dinitrosopentamethlyene tetramine and Diisopropyl azodicarboxylate, polyethylene oxide-propylene oxide, water soluble phenol resin, polyacrylic ester, aminoresin, polyethers, polyvinyl alcohol, fatty alcohol-polyoxyethylene ether, alkylphenol polyoxyethylene, polyoxyethylene carboxylate, alkylol amide Soxylat A 25-7, Block polyoxyethylene-polyethenoxy ether, alkyl polyglycoside, polyvalent alcohol stearate, Span, fatty acid ethylene oxide condensate, castor oil polyoxyethylene ether, one or more in polyoxyethylene glycol dioleic acid ester and Spans series and the esterification of Tweens series and etherification product.
5. according to the warm-mixed asphalt described in claim 1 or 2, it is characterized in that: in warm-mixed asphalt, add one or more in antistripping agent, antiaging agent, antioxidant, dispersion agent, stablizer or polymer modifiers.
6. a preparation method for the warm-mixed asphalt described in claim 1 or 2, is characterized in that comprising following content: stearic acid, cocoanut fatty acid diethanolamide are added reaction vessel by proportioning by (1) respectively, mix; (2) by proportioning, the mixture in step (1) is added in matrix pitch again, mix, make warm-mixed asphalt.
7. in accordance with the method for claim 6, it is characterized in that: the mixing temperature described in step (1) is 60 ~ 90 DEG C, mixing time is 20 ~ 30 minutes.
8. in accordance with the method for claim 6, it is characterized in that: the mixing temperature described in step (2) is 130 ~ 150 DEG C, mixing time is 30 ~ 60 minutes.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105110707A (en) * | 2015-08-20 | 2015-12-02 | 中国葛洲坝集团第二工程有限公司 | High-strength repair material for asphalt pavement cracks |
| CN105670316A (en) * | 2016-02-04 | 2016-06-15 | 武汉成世通环保沥青工程有限公司 | Common high-solid-content medium temperature pitch and preparing method thereof |
| CN106317518A (en) * | 2015-06-17 | 2017-01-11 | 中国石油化工股份有限公司 | Warm mix agent used for warm mix asphalt, and application method of warm mix agent |
| CN108659552A (en) * | 2017-03-31 | 2018-10-16 | 中国石油化工股份有限公司 | A kind of environmental protection warm-mixed asphalt and preparation method thereof |
| CN109880389A (en) * | 2019-03-19 | 2019-06-14 | 重庆理工大学 | A kind of high temperature anti-rutting modified asphalt and preparation method thereof |
| CN117326817A (en) * | 2023-12-01 | 2024-01-02 | 鄂尔多斯市路泰新材料科技发展有限公司 | Regenerated warm mix agent, asphalt mixture and preparation method thereof |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7815725B2 (en) * | 2007-09-07 | 2010-10-19 | Alm Holding Co. | Warm asphalt binder compositions containing lubricating agents |
| EP2062943A1 (en) * | 2007-11-14 | 2009-05-27 | Akzo Nobel N.V. | Asphalt modifiers for "warm mix" applications including adhesion promoter |
| FR2942222B1 (en) * | 2009-02-13 | 2011-03-18 | Colas Sa | ADDITIVE SYSTEM FOR THE PREPARATION OF AMERICAN-TYPE SURFACTANT ROAD-TYPE ROAD |
| CN102838317A (en) * | 2012-09-17 | 2012-12-26 | 山东建筑大学 | Heavy asphalt warm mixing agent and preparation method thereof |
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| CN106317518A (en) * | 2015-06-17 | 2017-01-11 | 中国石油化工股份有限公司 | Warm mix agent used for warm mix asphalt, and application method of warm mix agent |
| CN105110707A (en) * | 2015-08-20 | 2015-12-02 | 中国葛洲坝集团第二工程有限公司 | High-strength repair material for asphalt pavement cracks |
| CN105110707B (en) * | 2015-08-20 | 2017-09-15 | 中国葛洲坝集团第二工程有限公司 | Asphalt pavement crack strength patching material |
| CN105670316A (en) * | 2016-02-04 | 2016-06-15 | 武汉成世通环保沥青工程有限公司 | Common high-solid-content medium temperature pitch and preparing method thereof |
| CN105670316B (en) * | 2016-02-04 | 2018-06-08 | 武汉成世通环保沥青工程有限公司 | Common mid temperature pitch of high solids content and preparation method thereof |
| CN108659552A (en) * | 2017-03-31 | 2018-10-16 | 中国石油化工股份有限公司 | A kind of environmental protection warm-mixed asphalt and preparation method thereof |
| CN108659552B (en) * | 2017-03-31 | 2021-10-22 | 中国石油化工股份有限公司 | Environment-friendly heat-insulating mixed asphalt and preparation method thereof |
| CN109880389A (en) * | 2019-03-19 | 2019-06-14 | 重庆理工大学 | A kind of high temperature anti-rutting modified asphalt and preparation method thereof |
| CN109880389B (en) * | 2019-03-19 | 2021-08-17 | 重庆理工大学 | High-temperature anti-rutting modified asphalt and preparation method thereof |
| CN117326817A (en) * | 2023-12-01 | 2024-01-02 | 鄂尔多斯市路泰新材料科技发展有限公司 | Regenerated warm mix agent, asphalt mixture and preparation method thereof |
| CN117326817B (en) * | 2023-12-01 | 2024-01-30 | 鄂尔多斯市路泰新材料科技发展有限公司 | Regenerated warm mix agent, asphalt mixture and preparation method thereof |
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