CN1635052A - Process for manufacturing modified asphalt for porous pavement - Google Patents
Process for manufacturing modified asphalt for porous pavement Download PDFInfo
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- CN1635052A CN1635052A CN 200310123870 CN200310123870A CN1635052A CN 1635052 A CN1635052 A CN 1635052A CN 200310123870 CN200310123870 CN 200310123870 CN 200310123870 A CN200310123870 A CN 200310123870A CN 1635052 A CN1635052 A CN 1635052A
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- asphalt
- coal
- modifying asphalt
- tar pitch
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Abstract
The invention disclose the process for manufacturing modified asphalt for porous pavement which comprises, heating the medium temperature coal-tar asphalt till melting, charging into dissolvent deasphalting apparatus along with toluene, mixing the obtained asphalt of detoluene non-dissolvent with SBS polymeric compound directly, mixing the mother liquid with oil petroleum to obtain high adhesiveness modified asphalt for use in porous pavement and high grade express highway.
Description
Technical field
The invention provides the production technique of a kind of porous pavements with modifying asphalt.
Background technology
Porous asphalt pavement originates from Europe, and nineteen sixty, Germany built this kind road surface first, was called as Porous Asphalt, promptly is big space or drain type road surface; Be also referred to as Prevrous Macadam in Britain, i.e. the macrovoid asphalt macadam.The U.S. and Japan are called Open Graded Asphalt Frichtion Couse, are called for short OGFC, i.e. open gradation pitch layer of displacement.From the end of the eighties, be used widely in Europe, North America, Japan and Australia.
Porousness asphalt pavement mixture coarse particles is many, and fine particle is few, can not form strong interlock action between the particle, and the intensity of compound mainly relies on the cohesive action of binder.Yet the porousness asphalt just must possess the effect that enough intensity just can be born traffic loading both as a kind of surfacing material.Therefore the binder of porousness used for asphalt mixture should have higher cohesive force.
The bituminous pavement of high porosity, rainwater is drained from the road surface internal penetration, very easily is subjected to the infringement of water and produces and peel off, so that might cause destruction such as ravelling.So, guarantee that porousness asphalt water resisting property is very important.This not only requires asphaltic binder to have good cohesive force, and will good adhesivity be arranged with mineral aggregate.High porosity bituminous pavement, light, air go deep into the inside of compound easily, quicken the ager process on road surface.Therefore, used binder also should have good aging properties.
Obviously, making porousness bituminous pavement adopts plain asphalt can not satisfy above-mentioned requirements.Seek out satisfied result of use, must special preparation modifying asphalt, particularly bituminous adhesion property.
Originally the porousness bituminous pavement designs for improving cling property.Then sliding water for fear of aircraft in the rainy day on the airport floats and making.The country that has as Britain, thinks that should to adopt the big pitch of penetration degree as far as possible aging to prevent prematurely.Use plain asphalt making porous asphalt pavement, its intensity is obviously not enough, and the road surface easily is out of shape by further densification under action of traffic loading, and porosity reduces.Simultaneously because viscosity is low, and the oil film of surface of aggregate is thinner, to aging relatively more responsive, and aggregate particle is easy to break away from, and causes ravelling.High-adhesiveness is one of crucial factor for pitch.The adhesivity of existing modifying asphalt is bad, and its major cause is that polymkeric substance is difficult to or is difficult for and pitch forms uniform stabilising system that carrying out modification with petroleum pitch has certain limitation.Polymkeric substance at first will carry out swelling in petroleum pitch, just might further form stabilising system with pitch then.Studies show that in a large number the height of fragrance branch content is that can the decision polymkeric substance carry out the swollen key factor in pitch in the pitch.Bituminous fragrance divides the content height, and polymkeric substance swelling property therein is all right, has also just created condition for forming the measured high-adhesiveness modifying asphalt of matter.
Summary of the invention
The invention provides a kind of production technique of producing porous pavements, utilize the advantage of coal-tar pitch and petroleum pitch, comprehensively modifying PRODUCTION OF PITCH explained hereafter high-grade highway pitch and porous road bitumen with modifying asphalt.As everyone knows, the fragrance of coal-tar pitch divides the content height, and wherein fragrance divides content up to more than 50%.Research with petroleum pitch and coal-tar pitch blend production road bitumen is all arranged both at home and abroad.Compare with ordinary road pitch, the road of coal-tar pitch with advantage is: moistening preferably and adhesion property are arranged, and anti-oil corrosion performance is good, utilizes the surface friction coefficient of coal-tar pitch making big.But its fatal weakness is: the thermo-sensitivity height, and easily aging, the visco-elasticity temperature range is narrower, and contaminate environment is unfavorable to operator ' s health.And petroleum pitch thermo-sensitivity is low, the visco-elasticity wider range, and ageing resistance is better.But its main shortcoming is relatively poor to the adhesivity of metaling.Mix asphalt is that this two kinds of pitches blend is under certain condition by a certain percentage formed a kind of over-all properties asphalt variety more more excellent than single asphalt performance.Though the performance of mix asphalt is compared with former single pitch and improved a lot, compare bigger gap in addition with porous pavements with pitch with asphalt for high grade road.The present invention carries out the production technique that polymer modification is a kind of high-adhesiveness porous pavements usefulness and high-grade highway usefulness modifying asphalt to mix asphalt on this basis for this reason.
Embodiment
It is that solvent carries out the piptonychia benzene insoluble to coal-tar pitch with toluene that the present invention at first adopts solvent deasphalting technology, pitch with polymkeric substance and piptonychia benzene insoluble carries out blend then, polymkeric substance is dispersed in the coal-tar pitch preferably, again this mother liquor and petroleum pitch is carried out blend and make modifying asphalt.Concrete route is seen Fig. 1 pitch production scheme in the Figure of description.
The present invention can describe with following example:
Coal-tar middle oil pitch is carried out entering solvent deasphalting unit with toluene after the heat fused, the pitch of the piptonychia benzene insoluble that obtains at first carries out directly misciblely with polymkeric substance such as SBS, and the mother liquor after miscible carries out obtaining after miscible the modifying asphalt of high-adhesiveness with porous pavements and high-grade motorway with petroleum pitch again.
The pitch that utilizes the present invention to produce has following characteristic: 1. preferably moistening and adhesion property is arranged; 2. anti-oil corrosion performance is good; 3. utilize the surface friction coefficient of this pitch making big; 4. thermal sensitivity is low, is difficult for aging; 5. viscoplasticity wider range; 6. Production technology is simple, easy construction; 7. environmental pollution is little; 8. in addition, the present invention is used for regulating equilibrium of stock, replenishes the oil drop Blue or green deficiency has great Social benefit and economic benefit, has opened up simultaneously a kind of new technology that China produces modified pitch.
Claims (4)
1. the production technique of a modifying asphalt, the advantage of coal-tar pitch, petroleum pitch and modifying asphalt has been made up in this invention.At first coal-tar pitch is carried out the piptonychia benzene insoluble, then polymkeric substance such as SBS and piptonychia benzene insoluble coal-tar pitch are carried out the miscible mother liquor that obtains polymkeric substance and coal-tar pitch, again this mother liquor and petroleum pitch are carried out the miscible modifying asphalt that obtains.
2. modifying asphalt production technique according to claim 1 is characterized in that coal-tar pitch is carried out the pre-treatment of piptonychia benzene insoluble, and the solvent of employing is a toluene, and technology is solvent deasphalting technology.
3. modifying asphalt production technique according to claim 1 is characterized in that at first will obtaining polymer mother liquor in the coal-tar pitch of polymer dissolution behind piptonychia benzene.
4. modifying asphalt production technique according to claim 1 is characterized in that the characteristics of comprehensive coal-tar pitch, petroleum pitch and modifying asphalt are produced novel modified asphalt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310123870 CN1635052A (en) | 2003-12-31 | 2003-12-31 | Process for manufacturing modified asphalt for porous pavement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310123870 CN1635052A (en) | 2003-12-31 | 2003-12-31 | Process for manufacturing modified asphalt for porous pavement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1635052A true CN1635052A (en) | 2005-07-06 |
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ID=34844886
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200310123870 Pending CN1635052A (en) | 2003-12-31 | 2003-12-31 | Process for manufacturing modified asphalt for porous pavement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1635052A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101705003B (en) * | 2009-11-26 | 2011-05-04 | 济南开发区星火科学技术研究院 | Coal tar pitch for high-grade roads |
| CN103965928A (en) * | 2014-04-30 | 2014-08-06 | 上海宝聚新化能源科技有限公司 | Coking method for coal-oil mixed pitch |
-
2003
- 2003-12-31 CN CN 200310123870 patent/CN1635052A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101705003B (en) * | 2009-11-26 | 2011-05-04 | 济南开发区星火科学技术研究院 | Coal tar pitch for high-grade roads |
| CN103965928A (en) * | 2014-04-30 | 2014-08-06 | 上海宝聚新化能源科技有限公司 | Coking method for coal-oil mixed pitch |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20050706 |