CN101456700B - Method for preparing composite modified rubber asphalt mixture - Google Patents
Method for preparing composite modified rubber asphalt mixture Download PDFInfo
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- CN101456700B CN101456700B CN2008102075064A CN200810207506A CN101456700B CN 101456700 B CN101456700 B CN 101456700B CN 2008102075064 A CN2008102075064 A CN 2008102075064A CN 200810207506 A CN200810207506 A CN 200810207506A CN 101456700 B CN101456700 B CN 101456700B
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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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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The invention discloses a method for preparing a composite modified rubber asphalt mixture, which comprises the following steps: adding tire rubber powder into road petroleum asphalt to be made into rubber asphalt; adding SIS, coumarone indene resin and oleic acid amide into a screw extruder to carry out bracing and granulating so as to form modifying agent; and adding stone in mineral aggregate after heating into the modifying agent, stirring the mixture evenly and then adding the mixture into the rubber asphalt, and stirring the mixture evenly to obtain a finished product of the composite modified rubber asphalt mixture. The rubber asphalt mixture prepared by the method improves adhesiveness and workability of the product at the same time of ensuring high-temperature and low-temperature performances of the mixture.
Description
Technical field
The present invention relates to the preparation method of modified rubber asphalt mixture.
Background technology
Rubber asphalt is meant the tyre rubber powder of content more than 15% under the condition of high temperature and abundant mix, reacts the modifying asphalt consolidating material that obtains with molten the expanding of pitch.Owing to be to adopt to reclaim tire, compare styrene-butadiene block copolymer (SBS) modifying asphalt and have cost advantage, but the rubber asphalt of pure tire rubber formulations also exist not enough on high-temperature stability, adhesivity, workability as modification master material.
In order to promote the over-all properties of rubber asphalt, added other properties-correcting agent in the past in the rubber asphalt and carried out modification.The technology that existing rubber powder is applied to bituminous pavement mainly is divided into wet method and dry method two big classes, wet processing be meant with properties-correcting agent at first with the new agglutinate of the compound acquisition of pitch, again agglutinate and aggregate blending are obtained the technology of compound.Dry process is at rubber particle size, rubber consumption and mix and have clear superiority on the control equipment, but most in the world researchs are several on wet processing, its major cause is to adopt the test road unstable properties of dry process making, and the wet processing relative performance is comparatively satisfactory.
In recent years, combine with the wet method novel method of preparation rubber-asphalt mixture of a kind of dry method occurred, and put down in writing a kind of junked tire that utilizes as Chinese patent CN1807514 and adopted hybrid system to prepare the method for modified asphalt mixture.Junked tire is ground into thin rubber powder, and this thin rubber powder mixes, stirs with matrix pitch, obtains rubber asphalt; The employing gap gradation gathers materials, and will gather materials and sieve, and obtains thin, coarse aggregate; Rubber grain mixes, mixes system with thick, fine aggregate, adds rubber asphalt then and mixes system, adds breeze at last and mixes and stirs, and obtains desired product.Chinese patent CN1831043 has put down in writing the another kind of preparation method who can be used for the composite modified rubber asphalt mixture of deck paving under heavily loaded traffic and the hot conditions.This method is with 10～23% tyre rubber powder, joins in 77～90% bi tumenf orr oads, is mixed with rubber asphalt; Then 100 parts mineral aggregate is heated to 160～200 ℃, 0.2～0.8 part of PE is joined in the mineral aggregate, add the prepared rubber asphalt of 6.5～11 mass parts again.
Because be subjected to the restriction of factor such as selection, the rubber-asphalt mixture of method for preparing is still unsatisfactory on adhesion property, high-temperature behavior.The insufficient major cause of adhesion property is to have added in the rubber asphalt rubber powder up to more than 15%, causes pitch too thick, therefore is difficult to wrap on the building stones surface; After the major cause of high-temperature behavior difference is that the adhesion property of rubber asphalt and building stones reduces, cause high-temperature behavior to reduce, the asphalt content that adds in the rubber-asphalt mixture is higher in addition, high by about 50% than plain asphalt compound asphalt content, corresponding its high-temperature behavior of the compound of higher asphalt content correspondence is relatively poor.If in rubber asphalt, add properties-correcting agent again, can cause rubber asphalt viscosity higher, though there is patent to add, still can increase the difficulty of construction of rubber-asphalt mixture by dry method.
Summary of the invention
The objective of the invention is to overcome defective of the prior art, a kind of novel method for preparing composite modified rubber asphalt mixture is provided.
Method of the present invention comprises the following steps:
1. based on the rubber gross weight,, join in the bi tumenf orr oad of weight percent 77-85%, under 180-200 ℃ condition, stirring reaction 45-120 minute, make rubber asphalt the tyre rubber powder of weight percent 15-23%;
2. by following parts by weight, SIS, coumarone indene resin and amine hydroxybenzene are added the screw extrusion press stretching and granulation, its extrusion temperature is controlled at 120-200 ℃: SIS 100; Coumarone indene resin 60-100; Amine hydroxybenzene 40-60;
3. the building stones in the mineral aggregate of 100 weight parts are heated to 160-200 ℃, add granulated that 0.2-1 weight part step 2 obtains, stir;
4. in the mixture that step 3 obtains, add the rubber asphalt of step 1 acquisition of 7-11 weight part, stir, promptly make the composite modified rubber asphalt mixture finished product.
Building stones in the above-mentioned steps 3 meet following grating and require:
| Size of mesh | 16.0 | ?13.2 | ?9.5 | ?4.75 | ?2.36 | ?0.075 |
| Gap grading | 100 | ?80-100 | ?55-80 | ?25-42 | ?14-28 | ?0-6 |
Preferable, after step 4, also comprise the mineral or the cement filler that add again in the 1-6 weight part mineral aggregate.
Above-mentioned bi tumenf orr oad is an ordinary road petroleum pitch.
Above-mentioned tyre rubber powder, broken and remove powder behind steel wire and the fiber for junked tire, powder size is the 20-70 order.
Above-mentioned SIS is a styrene isoprene styrene block copolymer (SIS), is a kind of thermoplastic elastomer.SIS is sophisticated commercially available prod.Preferable, among the described SIS, styrene content is 20-40%, and all the other are isoprene, and number-average molecular weight is 30,000-120,000.
Above-mentioned coumarone indene resin is to adopt the unsaturated hydrocarbons such as byproduct C9 of hexanolactam to obtain commercially available acquisition by polymerization methods.In the present invention, preferred softening temperature is 80-110 ℃ a coumarone indene resin.
The present invention also belongs to a kind of dry method and combines with wet method and prepare the method for composite modified rubber asphalt mixture.The present invention is at first with rubber powder and the new agglutinate of the compound acquisition of pitch, then will form properties-correcting agent after SIS, coumarone indene resin and the amine hydroxybenzene granulation, properties-correcting agent is finished dispersion with the premixing that gathers materials earlier, then both are mixed, in the mix process, SIS, coumarone indene resin and amine hydroxybenzene are further realized the modification to rubber asphalt medium pitch component.
Because the dispersion of SIS, coumarone indene resin and amine hydroxybenzene needs the shears effect, and shears can cause the grain breakage of rubber asphalt processing, therefore, SIS, coumarone indene resin and amine hydroxybenzene also are not suitable for directly adding and prepare agglutinate in the pitch, and, prepare agglutinate in SIS, coumarone indene resin and amine hydroxybenzene such as the direct adding pitch, also can cause viscosity excessive, increase difficulty of construction on the contrary, so the use of these properties-correcting agent, also need use method of the present invention.Therefore this programme can not increase the pumping difficulty of rubber asphalt owing to adopt dry method to add.
Add SIS in the properties-correcting agent, will significantly improve the adhesion property and the high-temperature behavior of rubber-asphalt mixture;
Add the lower coumarone indene resin of softening temperature, this can make SIS disperse therein, dissolve better on the one hand, and SIS is after coumarone indene resin is scattered, and it is faster to cause it to disperse in gathering materials; In addition, find that by a large amount of tests SIS and coumarone indene resin have good consistency, be much better than the conventional SBS and the consistency of C5 petroleum resin system, consistency well also can promote SIS dissolving and dispersion therein, its dissolving and dispersion in gathering materials of corresponding quickening;
By in properties-correcting agent, adding amine hydroxybenzene, the viscosity of whole modifier system is reduced, this mainly is because amine hydroxybenzene has the performance of wax, can reduce the viscosity of modifier system significantly, wherein also contain simultaneously amine component, this also will improve the surface tension of system, these characteristics also can be improved the flowing property of system, and the performance of this two aspect will be improved the flowability of system, this at first can guarantee SIS in system better dissolving with disperse, correspondingly can promote the dispersion of SIS in gathering materials; The existence of amine in the amine hydroxybenzene in addition, make it in pitch, have the performance of antistripping agent, thereby improve the bituminous adhesion property, wax is when reducing asphalt viscosity, also improved pitch the infiltration on building stones surfaces with wrap performance, the improvement of this two aspects performance also can improve the bituminous adhesion property; Because the bituminous adhesion property has obtained improvement, also with regard to corresponding raising bituminous high-temperature behavior;
The amine hydroxybenzene of proper content can improve the adhesion property and the high-temperature behavior of rubber-asphalt mixture in the properties-correcting agent.Be that at the insufficient major cause of present rubber asphalt adhesion property pitch is too thick, be difficult to the reason that wraps on the building stones surface, owing to contain amine hydroxybenzene in the properties-correcting agent, when with properties-correcting agent when gathering materials premixing, amine hydroxybenzene can at first melt from properties-correcting agent, forms the effective amine hydroxybenzene transition layer of one deck on the building stones surface earlier, and amine hydroxybenzene itself is owing to belong to amine, therefore can play the performance of class sapropelitic antistripping agent commonly used, improve the adhesion property of rubber asphalt and building stones; The existence of amine hydroxybenzene transition layer in addition can improve the interface performance on building stones surface, thereby guarantees that there is better adhesivity on the building stones surface with rubber asphalt; Last amine hydroxybenzene itself has the performance of wax, can increase the flowability of rubber asphalt after the adding, thereby increases the performance that wraps of rubber asphalt and building stones, has also further improved the adhesion property of rubber asphalt; Be the relatively poor reason of adhesion property of rubber asphalt and building stones in addition at the major cause of high-temperature behavior difference, above factor is when increasing substantially the rubber asphalt adhesion property, by improving adhesion property, the high-temperature behavior of corresponding raising compound.
The rubber-asphalt mixture that preparation method of the present invention obtains can improve high-temperature behavior, the adhesion property of rubber-asphalt mixture simultaneously.
Embodiment
With further elaboration the present invention, should be understood that embodiment is used to limit protection scope of the present invention below in conjunction with embodiment.
Embodiment 1-5
Press the formulation asphalt modifier with high viscosity of table 1 weight part:
Raw material sources:
SIS:Kraton company produces, model Kraton D-1161, and product specification is as follows:
Coumarone indene resin: Earthquake of Anyang station in Henan Jin Maoxiang company produces, and softening temperature is 100 ℃
Amine hydroxybenzene: Jiangxi Weike Oil Chemical Co., Ltd. produces, and leading indicator can be as follows:
| Acid number mgKOH/g | Fusing point ℃ | Iodine number gl2/100g | Colourity Hazen |
| 0.5 | 74 | 82-88 | 50 |
SBS: LG Corp of South Korea production, model are LG-501
The C5 petroleum resin: grand celebration Hua Ke company produces, and softening temperature is 100 ℃
SIS, coumarone indene resin and amine hydroxybenzene are added the screw extrusion press stretching and granulation become asphalt modifier with high viscosity, its extrusion temperature is controlled to be 160 ℃, test its melting index (190 ℃ 2.16kg), the results are shown in Table 1:
As can be seen from Table 1, the scheme that the present invention adopts can obviously increase the melting index of properties-correcting agent, and this will improve the fusing time of properties-correcting agent in gathering materials greatly.
1 30g asphalt modifier with high viscosity is joined respectively under 180 ℃ in No. 70 pitches of 1000g Esso, with the stirring velocity of machine,massing bituminous composition is stirred with 200 rev/mins, can see increase along with churning time, the particle diameter of asphalt modifier with high viscosity in pitch can diminish gradually, as dissolution time, the dissolution time of asphalt modifier with high viscosity sees Table 1 with the churning time of 20 microns of the maximum particle diameter of SIS in pitch.Definite method of asphalt modifier with high viscosity size in pitch: the modifying asphalt of heat is dripped cloth moulding on slide glass, the blue light that inspires with fluorescence light source at fluorescent microscope shines the modifying asphalt on slide glass at normal temperatures, segmented copolymer in the modifying asphalt can reflect the long gold-tinted of wavelength under the exciting of fluorescence, viewed yellow substance is the SIS phase under fluorescent microscope, and the size of its yellow particle diameter is segmented copolymer size in pitch.
As can be seen from Table 1, the dissolution time of properties-correcting agent in pitch of the present invention's preparation was less than 120 minutes, its dissolution time also obviously shortens after adopting amine hydroxybenzene, show that the scheme that the present invention adopts can obviously shorten the dissolution time of properties-correcting agent in pitch, this will improve the fusing time in gathering materials of properties-correcting agent greatly.
Table 1
| The embodiment numbering | SIS | Coumarone indene resin | Amine hydroxybenzene | Melting index g/10min | Dissolution time (minute) |
| 1 | 100 | 80 | 50 | 35 | 40 |
| 2 | 100 | 100 | 50 | 32 | 66 |
| 3 | 100 | 60 | 60 | 28 | 58 |
| 4 | 100 | 90 | 40 | 41 | 34 |
| 5 | 100 | 80 | 40 | 34 | 42 |
Properties-correcting agent in following examples refers to adopt the granulation properties-correcting agent (i.e. 100 parts of SIS, 80 parts of coumarone indene resins, 50 parts of amine hydroxybenzenes) of embodiment 1 scheme preparation
Embodiment 6
Prepare rubber-asphalt mixture as follows:
1. in the rubber asphalt mass percent, the tyre rubber powder with 15% joins in 85% the bi tumenf orr oad (No. 70 bi tumenf orr oads), and under 180 ℃ condition, stirring reaction 45 minutes is made rubber asphalt;
2. the building stones in the mineral aggregate of 100 weight parts are heated to 160 ℃, add the properties-correcting agent of 0.2 weight part, stir;
3. in the mixture that step 2 obtains, add the rubber asphalt of step 1 acquisition of 6 weight parts, stir, promptly make the composite modified rubber asphalt mixture finished product.
Building stones in the above-mentioned steps 2 meet following grating and require:
| Size of mesh | 16.0 | ?13.2 | ?9.5 | ?4.75 | ?2.36 | ?0.075 |
| Gap grading | 100 | ?80 | ?55 | ?25 | ?14 | ?0 |
Comparative Examples 1:
Prepare rubber-asphalt mixture as follows:
1. in the rubber asphalt mass percent, the tyre rubber powder with 15% joins in 85% the bi tumenf orr oad, and under 180 ℃ condition, stirring reaction 120 minutes is made rubber asphalt;
2. the building stones in the mineral aggregate of 100 weight parts are heated to 160 ℃, add the PE of 0.5 weight part, stir;
3. in the mixture that step 2 obtains, add the rubber asphalt of step 1 acquisition of 6 weight parts, stir, promptly make the composite modified rubber asphalt mixture finished product.
Building stones in the above-mentioned steps 2 meet following grating and require:
| Size of mesh | 16.0 | ?13.2 | ?9.5 | ?4.75 | ?2.36 | ?0.075 |
| Gap grading | 100 | ?80 | ?55 | ?25 | ?14 | ?0 |
Embodiment 7
Prepare rubber-asphalt mixture as follows:
1. in the rubber asphalt mass percent, the tyre rubber powder with 23% joins in 77% the bi tumenf orr oad, and under 200 ℃ condition, stirring reaction 45 minutes is made rubber asphalt;
2. the building stones in the mineral aggregate of 100 weight parts are heated to 200 ℃, add the properties-correcting agent of 0.5 weight part, stir;
3. in the mixture that step 2 obtains, add the rubber asphalt of step 1 acquisition of 10 weight parts, stir, promptly make the composite modified rubber asphalt mixture finished product.
Building stones meet following grating and require:
| Size of mesh | 16.0 | ?13.2 | ?9.5 | ?4.75 | ?2.36 | ?0.075 |
| Gap grading | 100 | ?100 | ?80 | ?42 | ?28 | ?3 |
Comparative Examples 2:
Prepare rubber-asphalt mixture as follows:
1. in the rubber asphalt mass percent, the tyre rubber powder with 23% joins in 77% the bi tumenf orr oad, and under 200 ℃ condition, stirring reaction 45 minutes is made rubber asphalt;
2. the building stones in the mineral aggregate of 100 weight parts are heated to 200 ℃, add the rubber asphalt of step 1 acquisition of 10.5 weight parts, stir, promptly make the composite modified rubber asphalt mixture finished product.
Building stones meet following grating and require:
| Size of mesh | 16.0 | ?13.2 | ?9.5 | ?4.75 | ?2.36 | ?0.075 |
| Gap grading | 100 | ?100 | ?80 | ?42 | ?28 | ?3 |
Embodiment 8
Prepare rubber-asphalt mixture as follows:
1. in the rubber asphalt mass percent, the tyre rubber powder with 20% joins in 80% the bi tumenf orr oad, and under 180 ℃ condition, stirring reaction 100 minutes is made rubber asphalt;
2. the building stones in the mineral aggregate of 100 weight parts are heated to 180 ℃, add the properties-correcting agent of 1.0 weight parts, stir;
3. in the mixture that step 2 obtains, add the rubber asphalt of step 1 acquisition of 9 weight parts, stir, promptly make the composite modified rubber asphalt mixture finished product.
Building stones meet following grating and require:
| Size of mesh | 16.0 | ?13.2 | ?9.5 | ?4.75 | ?2.36 | ?0.075 |
| Gap grading | 100 | ?95 | ?65 | ?40 | ?18 | ?6 |
Comparative Examples 3:
Prepare rubber-asphalt mixture as follows:
1. in the rubber asphalt mass percent, the tyre rubber powder with 18%, 10% properties-correcting agent joins in 72% the bi tumenf orr oad, and under 180 ℃ condition, stirring reaction 100 minutes is made rubber asphalt;
2. the building stones in the mineral aggregate of 100 weight parts are heated to 180 ℃, add the rubber asphalt of step 1 acquisition of 10 weight parts, stir, promptly make the composite modified rubber asphalt mixture finished product.
Building stones meet following grating and require:
| Size of mesh | 16.0 | ?13.2 | ?9.5 | ?4.75 | ?2.36 | ?0.075 |
| Gap grading | 100 | ?95 | ?65 | ?40 | ?18 | ?6 |
The compound finished product moulding compound rut test piece of the foregoing description and each Comparative Examples, marshal piece, the forming method of compound carries out according to Chinese transportation ministerial standard " highway engineering pitch and asphalt testing regulation " JTJ052-2000 specified standards method, wherein the temperature of mixing and stirring of compound is 160 ℃, mold temperature is 145 ℃, rut test piece roller-compaction number of times is 12 times, and test its asphalt mixture in track test dynamic stability according to Chinese transportation ministerial standard " highway engineering pitch and asphalt testing regulation " JTJ052-2000 specified standards method, the asphalt low-temperature bending test breaking strain when of asphalt freeze thawing split test retained strength, test-results such as table 2:
Table 2
| Test index | Embodiment 6 | Comparative Examples 1 | Embodiment 7 | Comparative Examples 2 | Embodiment 8 | Comparative Examples 3 |
| The asphalt mixture in track test dynamic stability (inferior/mm) | 2820 | ?2845 | ?4425 | ?520 | ?6251 | ?565 |
| Asphalt freeze thawing split test retained strength is than (%) | 80.1 | ?50.3 | ?86.6 | ?66.0 | ?83.2 | ?67.2 |
As seen from the above table: the compound dynamic stability of embodiment all be higher than Comparative Examples the compound dynamic stability, show and adopt rubber-asphalt mixture of the present invention that better high-temperature behavior is arranged; The compound freeze thawing split test retained strength of embodiment shows and adopts rubber-asphalt mixture of the present invention that better adhesion property is arranged than the retained strength ratio that all is higher than Comparative Examples.
Claims (4)
1. a method for preparing composite modified rubber asphalt mixture comprises the following steps:
A, based on the rubber asphalt gross weight, be the tyre rubber powder of 15-23% with weight percent, join in the bi tumenf orr oad that weight percent is 77-85%, under 180-200 ℃ condition, stirring reaction 45-120 minute, make rubber asphalt;
B, by following parts by weight, SIS, coumarone indene resin and amine hydroxybenzene are added the screw extrusion press stretching and granulation, its extrusion temperature is controlled at 120-200 ℃: SIS 100; Coumarone indene resin 60-100; Amine hydroxybenzene 40-60;
C, the building stones in the mineral aggregate of 100 weight parts are heated to 160-200 ℃, add granulated that 0.2-1 weight part step b obtains, stir;
D, in the mixture that step c obtains, add the rubber asphalt that the step a of 7-11 weight part obtains, stir, promptly make the composite modified rubber asphalt mixture finished product.
2. prepare the method for composite modified rubber asphalt mixture according to claim 1, it is characterized in that, the building stones among the described step c meet following grating and require:
3. prepare the method for composite modified rubber asphalt mixture according to claim 1, it is characterized in that, the powder size of described tyre rubber powder is the 20-70 order.
4. as preparing the method for composite modified rubber asphalt mixture as described in arbitrary claim among the claim 1-3, it is characterized in that steps d also comprises mineral or the cement filler that adds again in the 1-6 weight part mineral aggregate.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102850810A (en) * | 2012-08-27 | 2013-01-02 | 句容宁武科技开发有限公司 | Preparation method of polymer modified asphalt |
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| CN101913799B (en) * | 2010-07-13 | 2012-08-22 | 李彦伟 | Compound for stress absorbing layer of rubber asphalt and preparation method and application thereof |
| CN102827572A (en) * | 2012-09-17 | 2012-12-19 | 山东建筑大学 | Rubber and plastic waterproof bonding modification asphalt mastic and preparation method of rubber and plastic waterproof bonding modification asphalt mastic |
| CN102924936A (en) * | 2012-11-09 | 2013-02-13 | 重庆市智翔铺道技术工程有限公司 | Bituminous cold reclaiming agent and application of bituminous cold reclaiming agent in cold reclaiming of bituminous concrete |
| CN106633606A (en) * | 2016-10-13 | 2017-05-10 | 上海浦东路桥建设股份有限公司 | Colored asphalt cementing material suitable for heavy traffic and preparation method thereof |
| CN107628775A (en) * | 2017-10-12 | 2018-01-26 | 合肥学院 | A kind of preparation method of high temperature resistant asphalt concrete |
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