CN102604401A - SBR (styrene butadiene rubber) modified recycling agent for aged asphalt road surface in alpine regions, and preparation method and usage of the recycling agent - Google Patents
SBR (styrene butadiene rubber) modified recycling agent for aged asphalt road surface in alpine regions, and preparation method and usage of the recycling agent Download PDFInfo
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Abstract
The invention discloses an SBR (styrene butadiene rubber) modified recycling agent for an aged asphalt road surface in alpine regions, which comprises the following components by mass: 9.95-30% of SBR, 15-60% of 90A asphalt, 30-70% of extract oil, and 0.05-0.2% of a crosslinker. The invention also discloses a preparation method of the SBR modified recycling agent and a method for preparing recycled asphalt by use of the SBR modified recycling agent. The SBR modified recycling agent provided by the invention significantly improves the ductility of the aged asphalt, the recycled asphalt becomes pliable, the crack resistance of the road surface is remarkably improved, and the recycling agent is suitable for recycling of the aged asphalt road surface in alpine regions. For upgrading and processing of asphalt, generally only addition of the SBR modified recycling agent provided by the invention is needed, the processing technology is simple and the quality is easy to control. The SBR modified recycling agent has a good effect at a low temperature, raw materials are stable in quality and easy to purchase, storage stability are good, the physicochemical properties are stable, on-site operation are convenient, and the SBR modified recycling agent is suitable for on-site hot recycling construction as a special recycling agent in alpine regions and for factory processing for upgrading of asphalt.
Description
Technical field
The present invention relates to the regeneration of a kind of bituminous pavement aged asphalt heat and use the SBR modifying regenerant, especially a kind of bituminous pavement aged asphalt heat to extremely frigid zones is regenerated and is used the SBR modifying regenerant, with and preparation method thereof and method of use.
Background technology
The extremely frigid zones sunshine duration is long, ultraviolet ray is strong, height above sea level, temperature is low, day and night temperature is big, and these exceedingly odious natural condition have caused heavy damage to bituminous pavement, diseases such as the road surface ubiquity is loose, crack, hole groove, rut.These geographic Road maintenance tasks also just seem more arduous.
The recycling of the old material of bituminous pavement can be practiced thrift a large amount of pitch and sandstone material, saves construction investment, helps waste material treatment simultaneously, the protection environment.Pavement diseases such as in-situ heat regeneration technology (HIR) is loose through disposable effective removals of technology ability such as heating, rake pine, regenerator spreading, remixing, decking and rollings, pitted skin, crack, hole groove; Recover also to improve the road surface use properties, can be to old material 100% Recycling in former road surface, really accomplished the requirement of " building stones are used again, asphalt-regenerating "; Have advantages such as these waste asphalt mixtures of the milling of need not, collection and transportation; So the in-situ heat regeneration speed of application is fast, efficient is high.And adopt the construction of bicycle road usually, and low to the highway operation influence degree, to compare with traditional Road maintenance maintenance process, the sheet pavement in-situ heat regeneration technology has advantages such as energy-saving and environmental protection, construction quality is high, service life of road surface is long.The recycling of the old material of bituminous pavement, key are the recovery of the performance of asphalt.
The recovery of the performance of asphalt mainly depends on the interpolation of regenerator.The SBR modifying regenerant is of a great variety in the market, and description differs, and is not specifically designed to the product of extremely frigid zones.Existing plain asphalt reclaiming agent; The ductility of aged asphalt is recovered very little, and ubiquity has added a certain amount of situation that is still brittle failure, and crack resistance at low-temperature is very poor; Can not adapt to extremely frigid zones harsh climate environment at all; Therefore, use existing plain asphalt reclaiming agent to recover the performance of asphalt, have little effect at extremely frigid zones.
Summary of the invention
Main task of the present invention is the asphalt-regenerating requirement that adapts to extremely frigid zones aged asphalt road surface; Provide a kind of extremely frigid zones bituminous pavement asphalt heat recycling to use the SBR modifying regenerant; Improve the freeze proof endurance quality of low temperature of reclaimed bituminous pavement with this, prolong the work-ing life on road surface.The preparation method of this regenerator is provided simultaneously, and the method for use when also providing this regenerator to be used for the in-situ heat regeneration construction and this SBR modifying regenerant are used for inferior grade pitch and upgrade to high-grade bituminous method of use.
For satisfying the pitch in-situ heat regeneration technology requirement on extremely frigid zones aged asphalt road surface, extremely frigid zones aged asphalt of the present invention road surface SBR modifying regenerant, the mass percent of each component is following:
Styrene-butadiene rubber(SBR) (SBR) 9.95～30%
90A pitch 15～60%
Extract oil 30～70% out
Linking agent 0.05～0.2%.
Styrene-butadiene rubber(SBR) (SBR) in the SBR modifying regenerant of above-mentioned extremely frigid zones aged asphalt road surface, its main raw material is divinyl and vinylbenzene, processes through explained hereafter such as polymerization, cohesions, outward appearance is white or pale yellow powder shape.
90A pitch in the SBR modifying regenerant of above-mentioned extremely frigid zones aged asphalt road surface, its 15 ℃ of ductilities>100cm, softening temperature>46 ℃, penetration degree 80～100, preferably Esso 90A or shell 90A.
Extraction oil in the SBR modifying regenerant of above-mentioned extremely frigid zones aged asphalt road surface is furfural oil, vacuum residuum, aromatic oil wherein a kind of preferably.
Linking agent (asphalt additive) in the SBR modifying regenerant of above-mentioned extremely frigid zones aged asphalt road surface is the existing product that is purchased, preferred Xi'an petrochemical industry MAW asphalt additive.
Comprise styrene-butadiene rubber(SBR) during material of the present invention is formed, extracted four kinds of materials such as oil, pitch, linking agent out.Styrene-butadiene rubber(SBR) has excellent low-temperature performance, can be used for modified asphalt material, improves the bituminous low-temperature ductility, does not destroy the pavement performance of pitch others simultaneously.Extracting oil out is a kind of good asphalt-regenerating material, and hardening becomes fragile after the ageing of asphalt, and fragrance divides loss serious; Extract oil out and contains more fragrance branch, can be in harmonious proportion softening aged asphalt, the fragrance branch of replenish loss; It is little to extract oil viscosity simultaneously out; Swelling ability to SBR is strong, and its adding can improve the working (machining) efficiency of SBR modifying regenerant, reduces the wearing and tearing of colloidal mill.Linking agent can improve the high temperature and the normal temperature storage stability of regenerator, reduces the aging of regenerator, stops isolating generation.Material is formed and is shown that this SBR modifying regenerant can dissolve each other with aged asphalt fully, improves the bituminous low-temperature ductility, strengthens the freeze proof crack resistance in road surface of extremely frigid zones, prolongs the work-ing life on road surface.
As the technological invention of a system, it is following to the invention allows for extremely frigid zones aged asphalt road surface SBR modifying regenerant preparation technology:
1. according to extremely frigid zones aged asphalt of the present invention road surface each constituent mass per-cent of SBR modifying regenerant, in stirred pot, pump into pitch, when being warming up to 120 ℃, pumping into and extract oil out, be incubated 120～130 ℃, stir 30～45min;
2. be warming up to 150～165 ℃, add styrene butadiene rubber sbr, be incubated 150～165 ℃, stir 30～60min;
3. add linking agent again, be warming up to 165～185 ℃, insulated and stirred 20～40min grinds with colloidal mill then;
4. grind 140～165 ℃ of back insulations, stir slaking 60～90min, process finished product, these article are the black viscous liquid.
The method for preparing regeneration asphalt with extremely frigid zones aged asphalt of the present invention road surface SBR modifying regenerant: aged asphalt is warming up to 120～160 ℃; Add the SBR modifying regenerant; The addition of SBR modifying regenerant is 5～20% of an asphalt quality, heats up 160～180 ℃ stir about 40～60 minutes; Stir, make regeneration asphalt.
The method of use in extremely frigid zones aged asphalt of the present invention road surface SBR modifying regenerant in-situ heat regeneration when construction: preheating extremely frigid zones bituminous pavement of the present invention SBR modifying regenerant to 80～120 ℃ on extremely frigid zones aged asphalt road surface; With heating installation former road surface is heated simultaneously, treat to harrow when temperature reaches 140～160 ℃ pine, spill distribution system through regenerator the direct rotation of extremely frigid zones bituminous pavement SBR modifying regenerant is sprayed on the road surface, carry out the remixing decking and rolling afterwards.
The method of use of extremely frigid zones aged asphalt of the present invention road surface SBR modifying regenerant when inferior grade pitch upgrades to high-grade pitch: inferior grade pitch is preheated to 150～160 ℃; Add about 5～20% extremely frigid zones bituminous pavement SBR modifying regenerant; Be incubated 150～160 ℃; Stir about 20～60min, process finishing.
Extremely frigid zones aged asphalt of the present invention road surface SBR modifying regenerant can significantly improve the ductility of aged asphalt, and regeneration back pitch becomes pliable and tough, and the road surface resistance to cleavage obviously increases, and is applicable to the regeneration on extremely frigid zones aged asphalt road surface; Be used for the pitch upgrading and add the general adding extremely frigid zones aged asphalt of the present invention road surface SBR modifying regenerant that only needs in man-hour, complete processing is simple, and quality is easy to control.
Extremely frigid zones aged asphalt road surface SBR modifying regenerant cryogenic effect is excellent, and raw material quality is stable, is easy to buying; Storage stability is good; Physicochemical property are stable, and convenient site operation is suitable as the extremely frigid zones in-situ heat regeneration special-purpose regenerator of constructing and processes with pitch upgrading batch production.
Extremely frigid zones aged asphalt of the present invention in addition road surface SBR modifying regenerant; Be used for the construction of extremely frigid zones sheet pavement in-situ heat regeneration, reduced the milling link of traditional Road maintenance maintenance process, do not have the transportation of new and old material; Old material 100% Recycling in former road surface; Need not to seek the place and pile up waste material, traffic is disturbed for a short time during construction, has tangible environment, economical, societal benefits.The regenerated road surface quality is high, can reach the standard of newly-built road.
Embodiment
Below in conjunction with embodiment, the present invention is elaborated.
Embodiment 1 extremely frigid zones aged asphalt road surface SBR modifying regenerant, each constituent mass per-cent:
Styrene-butadiene rubber(SBR) (SBR) 9.95%
90A pitch 60%
Extract oil 30% out
Linking agent 0.05%.
Embodiment 2 extremely frigid zones aged asphalt road surface SBR modifying regenerants, each constituent mass per-cent:
Styrene-butadiene rubber(SBR) (SBR) 30%
90A pitch 15%
Extract oil 54.8% out
Linking agent 0.2%.
Embodiment 3 extremely frigid zones aged asphalt road surface SBR modifying regenerants, each constituent mass per-cent:
Styrene-butadiene rubber(SBR) (SBR) 19.9%
90A pitch 10%
Extract oil 70% out
Linking agent 0.1%.
Among above-mentioned each embodiment: 90A pitch is selected Esso 90A or shell 90A for use,, 15 ℃ of ductilities>100cm, softening temperature>46 ℃, penetration degree 80～100; Extract wherein a kind of from furfural oil, vacuum residuum, aromatic oil of grease separation out; Linking agent is selected from MAW pitch linking agent.
Among above-mentioned each embodiment, the preparation method of extremely frigid zones aged asphalt road surface SBR modifying regenerant:
According to extremely frigid zones aged asphalt of the present invention road surface each constituent mass per-cent of SBR modifying regenerant,
1. in stirred pot, pump into pitch, when being warming up to 120 ℃, pumping into and extract oil out, be incubated 120～130 ℃, stir 30～45min;
2. be warming up to 150～165 ℃, add styrene butadiene rubber sbr, be incubated 150～165 ℃, stir 30～60min;
3. add linking agent again, be warming up to 165～185 ℃, insulated and stirred 20～40min grinds with colloidal mill then;
4. grind 140～165 ℃ of back insulations, stir slaking 60～90min, process finished product, these article are the black viscous liquid.
More than 2000 meter of Xinjiang crow match motorway height above sea level uses No. 90 pitches in Kelamayi, and the protobitumen detected result is seen table 1, and pitch is reclaimed with extraction process in former road surface after using 6 years, and detected result is seen table 1.
Table 1: detected result before and after 90 ageings of asphalt of Kelamayi
| ? | Penetration degree (0.1mm) | Softening temperature (℃) | 15 ℃ of ductilities (cm) | Kinetic viscosity (Pa.s) |
| Kelamayi 90 | 89 | 47.5 | >;100 | 190 |
| Aging back gram refining 90 | 45 | 64.5 | 18 | 1325 |
| JTG F40 requirement | 80～100 | >;45 | >;100 | >;160 |
Table 1 detected result shows: after this ageing of asphalt ductility loss more serious, penetration degree descends, softening temperature and kinetic viscosity rising.The low-temperature cracking-resistance loss of energy was more after ageing of asphalt was described, serious hardening becomes fragile, and softening temperature then increases to some extent, and its high-temperature behavior slightly promotes.
The extremely frigid zones aged asphalt road surface SBR modifying regenerant performance test results of each embodiment is seen table 2.
Table 2:
Can find out that from table 2 each item index of extremely frigid zones aged asphalt of the present invention road surface SBR modifying regenerant satisfies in " asphalt highway regeneration techniques standard " (JTG F41-2008) the regenerator specification of quality about hot-mix asphalt mixture.
Be used for aged asphalt regenerated method with the embodiment of the invention 1 extremely frigid zones aged asphalt road surface SBR modifying regenerant: aged asphalt is warming up to 120～160 ℃; The extremely frigid zones aged asphalt road surface SBR modifying regenerant that adds asphalt quality 5～20%; Insulation to 160～180 ℃; Stir about 40～60 minutes makes regeneration asphalt.The regeneration asphalt detected result is seen table 3.
Table 3:
| Regenerator adding proportion (%) | Penetration degree (0.1mm) | Softening temperature (℃) | 15 ℃ of ductilities (cm) | Kinetic viscosity (Pa.s) |
| 0 | 45 | 64.5 | 18 | 1325 |
| 5 | 69 | 58.5 | 82 | 753 |
| 8 | 85 | 55 | >;100 | 395 |
| JTG F40 requirement | 80～100 | >;45 | >;100 | >;160 |
Table 3 detects data and shows: it is in rising trend to add behind the SBR modifying regenerant of different ratios extremely frigid zones aged asphalt road surface aged asphalt penetration degree and ductility, and the pitch silk exists during test>100cm is still thicker.Each item index all can satisfy the technical requirements of 90A bi tumenf orr oad in " JTG F40-2004 asphalt highway construction technique normalizing " when SBR modifying regenerant addition is 8%.
In the compound of the former road surface of crow match high speed, add 8% extremely frigid zones aged asphalt road surface SBR modifying regenerant, former pavement asphalt compound and reclaimed asphalt mixture comparison test data are seen table 4.
Table 4:
| Detect index | Unit | Former road surface | Regenerated road surface | The F40-2004 code requirement |
| Theoretical maximum density | g/cm 3 | 2.596 | 2.574 | － |
| Voidage | % | 4.8 | 3.2 | 3～6 |
| Stability MS | KN | 12.57 | 12.03 | ≥8 |
| Flow valuve FL | mm | 2.68 | 3.67 | 2～4 |
| Residual stability | % | 80.2 | 84.7 | ≥80 |
| The freeze thawing splitting | % | 74.6 | 84.2 | ≥75 |
| Limit breaking strain | με | 2304 | 2734 | ≥2300 |
| Dynamic stability DS | Inferior/mm | 3197 | 3029 | ≥2500 |
Table 4 shows: the big flow valuve of former road surface compound hole rate is little, and is aging serious.After adding regenerator, porosity reduces to 3.2 by 4.8, and flow valuve brings up to 3.67 by 2.68, and stability and dynamic stability do not have much affect, and residual stability and freeze thawing cleavage strength satisfy code requirement, and the water stability of compound is improved.Low-temperature bending breaking strain value obviously improves, and the low-temperature performance of compound is improved, and in sum, the pavement performance of compound is improved, and more can satisfy heavy day by day transport need.
With extremely frigid zones aged asphalt of the present invention road surface SBR modifying regenerant and other regenerator aging Kelamayi pitch is regenerated respectively, the index detected result is seen table 5.
Table 5:
| Liaohe River aged asphalt | Penetration degree (0.1mm) | Softening temperature (℃) | 15 ℃ of ductilities (cm) | Kinetic viscosity (Pa.s) |
| 8% instance, 1 regenerator | 85 | 55 | >;100 | 395 |
| 8% certain regenerator | 78 | 52.5 | 51 | 697 |
| JTG F40 requirement | 80～100 | >;45 | >;100 | >;160 |
Table 5 shows: common regenerator is limited to the ductility recovery effects of aged asphalt, and SBR modifying regenerant effect aspect the ductility recovery in extremely frigid zones aged asphalt road surface is obvious.
Use extremely frigid zones aged asphalt of the present invention road surface SBR modifying regenerant to be used for Xi'an petrochemical industry asphalt residue and upgrade to 70A bituminous working method: inferior grade pitch is preheated to 150～160 ℃; Add about 5% extremely frigid zones aged asphalt road surface SBR modifying regenerant; Be warmed up to 160～180 ℃; Stir about 20～60min makes sample.Detect former Xi'an petrochemical industry asphalt residue and see table 6 with upgrading back 70A index.
Table 6:
| West petrochemical industry residual oil | Penetration degree (0.1mm) | Softening temperature (℃) | 15 ℃ of ductilities (cm) | Kinetic viscosity (Pa.s) |
| 0 | 45 | 51 | 58 | 239 |
| The 5%SBR regenerator | 63 | 47 | >;100 | 185 |
| JTG F40 requirement | 60～80 | >;46 | >;100 | >;180 |
Table 6 data show, add 5% extremely frigid zones aged asphalt road surface SBR modifying regenerant after, residual oil penetration degree rises, ductility increases, softening temperature descends, kinetic viscosity descends, index meets the 70A requirement, this material is applicable to bituminous upgrading processing.
The detected result of table 1～table 6 shows: use extremely frigid zones aged asphalt of the present invention road surface SBR modifying regenerant to regenerate to extremely frigid zones aged asphalt road surface; Need not add new pitch during regeneration; Technology is simple; The freeze proof weather resistance in regeneration road surface, back obviously improves, and satisfies extremely frigid zones in-situ heat regeneration site operation environment fully, is a kind of good extremely frigid zones aged asphalt pavement recycling material.
The foundation of above-mentioned regenerator and asphalt performance test is " highway engineering pitch and asphalt testing regulation " (JTG E20-2011).
Claims (5)
1. extremely frigid zones aged asphalt road surface SBR modifying regenerant, the mass percent of each component is following:
Styrene-butadiene rubber(SBR) (SBR) 9.95～30%
90A pitch 15～60%
Extract oil 30～70% out
Linking agent 0.05～0.2%.
2. according to the said extremely frigid zones aged asphalt of claim 1 road surface SBR modifying regenerant, it is characterized in that: said 90A pitch, its 15 ℃ of ductilities 100cm, softening temperature>46 ℃, penetration degree 80～100.
3. according to the said extremely frigid zones aged asphalt of claim 1 road surface SBR modifying regenerant, it is characterized in that: said extraction oil is furfural oil, vacuum residuum or aromatic hydrocarbon oil.
4. a method for preparing claim 1,2 or 3 said extremely frigid zones bituminous pavement SBR modifying regenerants the steps include: according to claim 1,2 or 3 said each constituent mass per-cent of extremely frigid zones bituminous pavement SBR modifying regenerant,
Step 1, in stirred pot, pump into pitch, when being warming up to 120 ℃, pumping into and extract oil out, be incubated 120～130 ℃, stirring 30～45min;
Step 2, be warming up to 150～165 ℃, add styrene butadiene rubber sbr, be incubated 150～165 ℃, stirring 30～60min;
Step 3, add linking agent again, be warming up to 165～185 ℃, insulated and stirred 20～40min grinds with colloidal mill then;
Slaking 60～90min is stirred in 140～165 ℃ of step 4, the insulations of grinding back, processes finished product.
5. the method for preparing regeneration asphalt with claim 1,2 or 3 said extremely frigid zones bituminous pavement SBR modifying regenerants; The steps include: aged asphalt is warming up to 120～160 ℃, add claim 1,2 or 3 said extremely frigid zones bituminous pavement SBR modifying regenerants, the addition of SBR modifying regenerant is 5～20% of an asphalt quality; Heat up 160～180 ℃; Stir about 40～60 minutes stirs, and makes regeneration asphalt.
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| CN104032652A (en) * | 2014-06-12 | 2014-09-10 | 青岛惠城石化科技有限公司 | Method for recycling aged petroleum pitch by using extracts of coking gas oil |
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| CN103073899A (en) * | 2012-12-26 | 2013-05-01 | 上海浦东路桥建设股份有限公司 | Environment-friendly waste road asphalt regenerating agent and preparation method thereof |
| CN103232711A (en) * | 2013-05-03 | 2013-08-07 | 中海油（青岛）重质油加工工程技术研究中心有限公司 | Low-temperature hydraulic asphalt and method for detecting cracking temperature of mixture replacing low-temperature hydraulic asphalt |
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| CN104032652A (en) * | 2014-06-12 | 2014-09-10 | 青岛惠城石化科技有限公司 | Method for recycling aged petroleum pitch by using extracts of coking gas oil |
| CN104032652B (en) * | 2014-06-12 | 2016-02-10 | 青岛惠城石化科技有限公司 | A kind of method utilizing the extract of wax tailings to reclaim aged petroleum pitch |
| CN105061846A (en) * | 2015-09-14 | 2015-11-18 | 广西大学 | Asphalt pavement reducing agent and preparation method for same |
| WO2017202395A1 (en) * | 2016-05-23 | 2017-11-30 | 江苏天诺道路材料科技有限公司 | Plant mix warm regenerated asphalt mixture and preparation method therefor |
| US11472740B2 (en) | 2016-05-23 | 2022-10-18 | Jiangsu Tiannuo Road Materials Co., Ltd. | Plant-mixed warm regenerated asphalt mixture and preparation method thereof |
| CN114853389A (en) * | 2022-04-19 | 2022-08-05 | 遂宁天孜路新材料技术有限公司 | Preparation method of low-temperature recycled asphalt and mixture |
| CN115521628A (en) * | 2022-10-25 | 2022-12-27 | 湖北工业大学 | Multilayer grafted aging-resistant recycled asphalt, and preparation method and application thereof |
| CN115521628B (en) * | 2022-10-25 | 2024-01-30 | 湖北工业大学 | Multi-layer grafted aging-resistant reclaimed asphalt, and preparation method and application thereof |
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