CN104098918A - Modified asphalt and preparation method thereof - Google Patents
Modified asphalt and preparation method thereof Download PDFInfo
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- CN104098918A CN104098918A CN201310125044.2A CN201310125044A CN104098918A CN 104098918 A CN104098918 A CN 104098918A CN 201310125044 A CN201310125044 A CN 201310125044A CN 104098918 A CN104098918 A CN 104098918A
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- segmented copolymer
- modifying asphalt
- rubber powder
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Abstract
The invention discloses a modified asphalt and a preparation method thereof. A raw material formula of the modified asphalt comprises, by mass, 100 parts of asphalt, 10-45 parts of tire rubber powder, 2-5 parts of an SBS segmented copolymer, 1-5 parts of a stabilizer and 2-5 parts of Sasobit polyolefin, and the stabilizer is a sulfur and dicumyl peroxide mixture. The preparation method of the modified asphalt comprises the following steps: 1, carrying out heating shearing stirring on an asphalt and SBS segmented copolymer mixture; 2, carrying out shearing stirring on the material obtained in step and the tire rubber powder; and 3, mixing the material obtained in step 2 with the stabilizer and the Sasobit polyolefin, and stirring. The modified asphalt has good high temperature stability, good low temperature crack resistance and good separation resistance.
Description
Technical field
The present invention relates to pitch field, relate in particular to a kind of modifying asphalt and preparation method thereof.
Background technology
Definition according to U.S. material with test association (ASTMD6114-97), rubber asphalt refers to that the above tyre rubber powder of content 15% reacts the modifying asphalt agglutinate obtaining under high temperature and the condition of fully mixing and stirring with pitch swelling more than (180 ℃), because rubber grain volume ratio after swelling can reach 40%, rubber asphalt and compound thereof can both manifest the characteristic of vulcanized rubber, low-temperature deformation ability, road surface are improved in the snappiness of the following temperature of normal temperature, adding the transmission of tire resistance of aging, is ideal long lifetime, cracking resistance bituminous material.Yet owing to going back Shortcomings in its high-temperature stability of traditional rubber asphalt; In Heavy Traffic, overload, be still difficult to meet the requirement of its rutting resistance above road, because traditional rubber asphalt tyre rubber powder and matrix pitch stir, disperse after melting still inhomogeneously simultaneously, have segregation phenomenon and produce, be unfavorable for standing storage; In addition, because tyre rubber powder volume is higher, rubber asphalt is excessive 170 ℃ of viscosity, and construction workability is poor.
Summary of the invention
Technical problem solved by the invention is that existing rubber asphalt high-temperature stability is bad in order to overcome, poor storage stability, the poor defect of construction workability, and a kind of modifying asphalt and preparation method thereof is provided.Modifying asphalt of the present invention has good crack resistance at low-temperature and good high temperature stability performance, and stability in storage and construction workability all improve a lot.
The present invention solves the problems of the technologies described above by the following technical programs:
The invention provides a kind of modifying asphalt, its composition of raw materials comprises the component of following mass fraction: 100 parts of pitches, tyre rubber powder 10-45 part, SBS segmented copolymer 2-5 part, stablizer 1-5 part and Sasobit polyolefine 2-5 part, described stablizer is the mixture of sulphur and dicumyl peroxide.
Wherein, described pitch can be the conventional various pitches that use in this area, is preferably shell 70# bi tumenf orr oad.
Wherein, the tire glue powder that described tyre rubber powder forms after generally referring to junked tire being pulverized, its various indexs are generally: metal content is less than 0.1%, ash oontent is less than 8%, acetone extract is less than 22%, and content of carbon black is less than 8%, and natural rubber content is greater than 30%, rubber hydrocarbon content is greater than 42%, and above-mentioned per-cent is mass percent.
Wherein, the order number of described tyre rubber powder is preferably 20-80 order, is more preferably 30-40 order.The consumption of described tyre rubber powder is preferably 20-30 part.
Wherein, described SBS segmented copolymer is styrene-butadiene-styrene block copolymer.The weight-average molecular weight of this SBS segmented copolymer is preferably 140,000-300,000; In this SBS segmented copolymer, the block ratio of vinylbenzene and divinyl is preferably (20:80)～(30:70); This SBS segmented copolymer is preferably star shaped SBS segmented copolymer, and its model can adopt YH-801 and/or YH-806, and it is as shown in the table for specific targets:
SBS segmented copolymer index
The consumption of described SBS segmented copolymer is preferably 2.5-3.5 part.
Wherein, described stablizer is preferably that sulphur and dicumyl peroxide are the mixture of 40:60～70:30 by weight, is more preferably that sulphur and dicumyl peroxide are the mixture of 50:50 by weight.The consumption of described stablizer is preferably 2-4 part.
Wherein, the polyolefinic consumption of described Sasobit is preferably 2.5-4 part, and this Sasobit polyolefine is purchased from German Sasol-Wax company.
Wherein, in the raw material of described modifying asphalt, can also contain various other additives of this area routine, as long as the effect of its not remarkably influenced modifying asphalt of the present invention.
The present invention also provides a kind of preparation method of aforementioned modifying asphalt, and it comprises the steps:
(1) by the mixture heating shear agitation of pitch and SBS segmented copolymer;
(2) again with tyre rubber powder shear agitation;
(3) again with stablizer, Sasobit polyolefine, stir.
Wherein, the operation of each in the preparation method of described modifying asphalt can be this area routine operation step and parameter thereof.
Wherein, in step (1), the temperature of described heating is preferably 180-190 ℃.In step (1), the rotating speed of described shear agitation is preferably 3000～6000rpm, and the time of shear agitation is preferably 50-80 minute.
Wherein, in step (2), the rotating speed of described shear agitation is preferably 4000～8000rpm, and the time of stirring is preferably 45-60 minute.
Wherein, in step (3), the rotating speed of described stirring is preferably 2000～5000rpm, and the time of stirring is preferably 3～5 minutes.
Meeting on the basis of this area general knowledge, above-mentioned each optimum condition, can arbitrary combination, obtains the preferred embodiments of the invention.
Agents useful for same of the present invention and raw material be commercially available obtaining all.
Positive progressive effect of the present invention is:
(1) modifying asphalt of the present invention has the softening temperature higher than common modifying asphalt, shows to have good high temperature stability performance;
(2) low-temperature ductility of modifying asphalt of the present invention is also further improved, and has good crack resistance at low-temperature; Meanwhile, rubber powder and the dispersiveness of SBS segmented copolymer in matrix pitch are better, have good anti-segregation ability, have improved its stability in storage;
(3) 175 ℃ of viscosity of modifying asphalt of the present invention are low compared with General Purpose Rubber pitch, have good construction workability.
Embodiment
Mode below by embodiment further illustrates the present invention, but does not therefore limit the present invention among described scope of embodiments.The experimental technique of unreceipted actual conditions in the following example, according to ordinary method and condition, or selects according to catalogue.
Embodiment 1-4
Pitch is shell 70# bi tumenf orr oad.
Tyre rubber powder is 30-40 object using rubber powder of waste tire, and its indices is: metal content is less than 0.1%, and ash oontent is less than 8%, acetone extract is less than 22%, and content of carbon black is less than 8%, and natural rubber content is greater than 30%, rubber hydrocarbon content is greater than 42%, and above-mentioned per-cent is mass percent.
Sulphur adopts industrial sulphur, and index meets acceptable end product and above requirement thereof in < < industrial sulphur > > (GB/T2449-2006).Dicumyl peroxide meets the requirement of acceptable end product, and outward appearance is colourless or white prismatic crystallization, fusing point >=38.5 ℃, massfraction >=99.0% of dicumyl peroxide, total volatile content≤0.3%.Sulphur pressed by stablizer and dicumyl peroxide is prepared by weight 50:50.
SBS segmented copolymer adopts YH-801, is purchased from Sinopec Ba Ling petrochemical complex limited liability company.
The Sasobit polyolefine adopting is the product of German Sasol Wax company, and physical and chemical index is as follows:
The polyolefinic physical and chemical index table look-up of Sasobit
| Index | Unit | Representative value |
| Fusing point | ℃ | 100 |
| Flash-point | ℃ | Approximately 290 |
| Viscosity (135 ℃) | cP | 12 |
| Penetration degree (25 ℃) | 0.1mm | ＜1 |
| Penetration degree (65 ℃) | 0.1mm | 7 |
| Density (25 ℃) | g/cm 3 | 0.94 |
The preparation method of modifying asphalt: by asphalt heating to 180 ℃, SBS segmented copolymer is joined in pitch to shear agitation 60 minutes, stirring velocity in embodiment 1～4 is respectively 3000rpm, 4000rpm, 5000rpm, 6000rpm, makes SBS modifying asphalt.Tyre rubber powder is joined in the SBS modifying asphalt being stirred, at 180 ℃, stir and react 45 minutes (embodiment 1), 50 minutes (embodiment 2), 55 minutes (embodiment 3), 60 minutes (embodiment 4), stirring velocity is 4000rpm(embodiment 1), 6000rpm(embodiment 2), 7000rpm(embodiment 3), 8000rpm(embodiment 4).Then add stablizer, Sasobit polyolefine, stir 4 minutes, stirring velocity is 2000rpm(embodiment 1), 3000rpm(embodiment 2), 4000rpm(embodiment 3), 5000rpm(embodiment 4), can make novel tire rubber powder composite modified asphalt of the present invention.The raw material of each embodiment and proportioning are in Table 1.
The composition of raw materials of table 1 embodiment 1-4 (wherein each umber is all in mass parts)
| Component | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 |
| Pitch | 100 | 100 | 100 | 100 |
| SBS segmented copolymer | 2.5 | 2.5 | 3 | 3.5 |
| Tyre rubber powder | 20 | 25 | 30 | 30 |
| Stablizer | 2 | 2.5 | 3 | 4 |
| Sasobit polyolefine | 2.5 | 3 | 3 | 4 |
For prepared modifying asphalt in upper table embodiment 1-4, carry out performance test.Testing method is carried out according to the < < of the Ministry of Communications highway engineering pitch and Asphalt Mixture Experiment rules > > (JTG E20-2011) relevant test method.Test result is in Table 2.
The detected result of table 2 embodiment 1-4
| Project | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 |
| Penetration degree (25 ℃), 0.1mm | 62 | 60 | 58 | 55 |
| Softening temperature, ℃ | 82 | 85 | 88 | 92.5 |
| Ductility (5 ℃), cm | 28 | 31 | 33 | 35 |
| Bu Shi rotary viscosity (175 ℃), Pa.S | 0.6 | 0.9 | 1.1 | 1.6 |
| Stability in storage 5d, % | 1.5 | 2 | 3 | 3 |
From above detected result, modifying asphalt of the present invention has the softening temperature higher than common modifying asphalt (softening temperature of common modifying asphalt of the prior art is 58.5 ℃), shows to have good high temperature stability performance; Meanwhile, rubber powder and the dispersiveness of SBS segmented copolymer in matrix pitch are better, have good anti-segregation ability; 175 ℃ of viscosity of this pitch, compared with General Purpose Rubber pitch low (the Bu Shi rotary viscosity of General Purpose Rubber pitch of the prior art (175 ℃) is 1.8～2.5Pa.S), have good construction workability.
By test, show, the asphalt of modifying asphalt of the present invention moulding under the same conditions has higher Marshall stability and dynamic stability, shows that this kind of pitch is greatly improved to the high-temperature stability tool of compound; Meanwhile, this kind of modification compound can carry out roller compaction construction smoothly at 165 ℃, and compactness is all more than 96%, illustrates that this kind of pitch has good construction workability; In addition, one week rear stability of this kind of bituminous pitch storing is still better, shows that its anti-segregation ability is improved.
Claims (10)
1. a modifying asphalt, it is characterized in that, its composition of raw materials comprises the component of following mass fraction: 100 parts of pitches, tyre rubber powder 10-45 part, SBS segmented copolymer 2-5 part, stablizer 1-5 part and Sasobit polyolefine 2-5 part, described stablizer is the mixture of sulphur and dicumyl peroxide.
2. modifying asphalt as claimed in claim 1, is characterized in that, described pitch is shell 70# bi tumenf orr oad; The order number of described tyre rubber powder is 20-80 order.
3. modifying asphalt as claimed in claim 2, is characterized in that, the order number of described tyre rubber powder is 30-40 order, and the consumption of described tyre rubber powder is 20-30 part.
4. modifying asphalt as claimed in claim 1, is characterized in that, the weight-average molecular weight of described SBS segmented copolymer is 140,000-300,000; Described SBS segmented copolymer is star shaped SBS segmented copolymer.
5. modifying asphalt as claimed in claim 4, is characterized in that, in described SBS segmented copolymer, the block ratio of vinylbenzene and divinyl is (20:80)～(30:70).
6. modifying asphalt as claimed in claim 5, is characterized in that, the model of described SBS segmented copolymer is YH-801 and/or YH-806, and the consumption of described SBS segmented copolymer is 2.5-3.5 part.
7. modifying asphalt as claimed in claim 1, is characterized in that, described stablizer is that sulphur and dicumyl peroxide are the mixture of 40:60～70:30 by weight, and the consumption of described stablizer is 2-4 part; The polyolefinic consumption of described Sasobit is 2.5-4 part.
8. modifying asphalt as claimed in claim 7, is characterized in that, described stablizer is that sulphur and dicumyl peroxide are the mixture of 50:50 by weight.
9. a preparation method for the modifying asphalt as described in any one in claim 1～8, is characterized in that, it comprises the steps:
(1) by the mixture heating shear agitation of pitch and SBS segmented copolymer;
(2) again with tyre rubber powder shear agitation;
(3) again with stablizer, Sasobit polyolefine, stir.
10. preparation method as claimed in claim 9, is characterized in that, in step (1), the temperature of described heating is 180-190 ℃; In step (1), the rotating speed of described shear agitation is 3000～6000rpm, and the time of shear agitation is 50-80 minute; In step (2), the rotating speed of described shear agitation is 4000～8000rpm, and the time of stirring is 45-60 minute; In step (3), the rotating speed of described stirring is 2000～5000rpm, and the time of stirring is 3～5 minutes.
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| CN201310125044.2A CN104098918A (en) | 2013-04-11 | 2013-04-11 | Modified asphalt and preparation method thereof |
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| CN201310125044.2A CN104098918A (en) | 2013-04-11 | 2013-04-11 | Modified asphalt and preparation method thereof |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105111757A (en) * | 2015-09-22 | 2015-12-02 | 长安大学 | High-viscosity modified pitch and preparation method thereof |
| CN106243747A (en) * | 2016-08-02 | 2016-12-21 | 柳小军 | A kind of high and cold modified pitch and preparation method thereof |
| CN106751968A (en) * | 2016-12-16 | 2017-05-31 | 漳州新立基沥青有限公司 | A kind of high performance modified bitumen and preparation method thereof |
| CN107446364A (en) * | 2017-04-01 | 2017-12-08 | 江苏中路工程技术研究院有限公司 | A kind of rubber asphalt and preparation method thereof |
| CN109181328A (en) * | 2018-09-28 | 2019-01-11 | 南京科技职业学院 | A kind of preparation method of composite modified asphalt |
| CN110128839A (en) * | 2019-04-29 | 2019-08-16 | 湖北卓宝科技有限公司 | A kind of wax powder modified pitch pretreating process |
| CN111218121A (en) * | 2018-11-23 | 2020-06-02 | 中国石油天然气股份有限公司 | Polymer modified asphalt cement and preparation method thereof |
| CN111471309A (en) * | 2020-04-15 | 2020-07-31 | 中路高科(北京)公路技术有限公司 | Asphalt modifier and preparation method thereof, modified asphalt and preparation method thereof |
| CN113698778A (en) * | 2020-11-19 | 2021-11-26 | 海南杰众石化有限公司 | Preparation method of modified environment-friendly asphalt |
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| CN1609165A (en) * | 2003-10-24 | 2005-04-27 | 中国石油化工股份有限公司 | Waste rubber powder modified asphalt and its prepn process |
| CN101240093A (en) * | 2008-03-07 | 2008-08-13 | 成都鑫利公路材料开发有限公司 | Road surface strengthening agent |
| CN101475746A (en) * | 2009-01-16 | 2009-07-08 | 武汉理工大学 | Waste asphalt reclaiming agent and preparation thereof |
| CN102532920A (en) * | 2010-12-17 | 2012-07-04 | 中国石油天然气股份有限公司 | Warm-mixed asphalt cement and preparation method thereof |
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Patent Citations (4)
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| CN1609165A (en) * | 2003-10-24 | 2005-04-27 | 中国石油化工股份有限公司 | Waste rubber powder modified asphalt and its prepn process |
| CN101240093A (en) * | 2008-03-07 | 2008-08-13 | 成都鑫利公路材料开发有限公司 | Road surface strengthening agent |
| CN101475746A (en) * | 2009-01-16 | 2009-07-08 | 武汉理工大学 | Waste asphalt reclaiming agent and preparation thereof |
| CN102532920A (en) * | 2010-12-17 | 2012-07-04 | 中国石油天然气股份有限公司 | Warm-mixed asphalt cement and preparation method thereof |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105111757A (en) * | 2015-09-22 | 2015-12-02 | 长安大学 | High-viscosity modified pitch and preparation method thereof |
| CN105111757B (en) * | 2015-09-22 | 2017-11-14 | 长安大学 | A kind of high-viscosity modified asphalt and preparation method thereof |
| CN106243747A (en) * | 2016-08-02 | 2016-12-21 | 柳小军 | A kind of high and cold modified pitch and preparation method thereof |
| CN106243747B (en) * | 2016-08-02 | 2019-02-19 | 柳小军 | A kind of high and cold modified pitch and preparation method thereof |
| CN106751968A (en) * | 2016-12-16 | 2017-05-31 | 漳州新立基沥青有限公司 | A kind of high performance modified bitumen and preparation method thereof |
| CN107446364A (en) * | 2017-04-01 | 2017-12-08 | 江苏中路工程技术研究院有限公司 | A kind of rubber asphalt and preparation method thereof |
| CN109181328A (en) * | 2018-09-28 | 2019-01-11 | 南京科技职业学院 | A kind of preparation method of composite modified asphalt |
| CN111218121A (en) * | 2018-11-23 | 2020-06-02 | 中国石油天然气股份有限公司 | Polymer modified asphalt cement and preparation method thereof |
| CN110128839A (en) * | 2019-04-29 | 2019-08-16 | 湖北卓宝科技有限公司 | A kind of wax powder modified pitch pretreating process |
| CN111471309A (en) * | 2020-04-15 | 2020-07-31 | 中路高科(北京)公路技术有限公司 | Asphalt modifier and preparation method thereof, modified asphalt and preparation method thereof |
| CN113698778A (en) * | 2020-11-19 | 2021-11-26 | 海南杰众石化有限公司 | Preparation method of modified environment-friendly asphalt |
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Application publication date: 20141015 |