CN1149264C - Method for producing rubber modified asphalt - Google Patents
Method for producing rubber modified asphalt Download PDFInfo
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- CN1149264C CN1149264C CNB021148007A CN02114800A CN1149264C CN 1149264 C CN1149264 C CN 1149264C CN B021148007 A CNB021148007 A CN B021148007A CN 02114800 A CN02114800 A CN 02114800A CN 1149264 C CN1149264 C CN 1149264C
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- Prior art keywords
- rubber
- stablizer
- asphalt
- modified asphalt
- hydrocarbon
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- 239000010426 asphalt Substances 0.000 title claims abstract description 107
- 229920001971 elastomer Polymers 0.000 title claims abstract description 98
- 239000005060 rubber Substances 0.000 title claims abstract description 98
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 61
- 239000000084 colloidal system Substances 0.000 claims abstract description 21
- 239000003607 modifier Substances 0.000 claims abstract description 16
- 239000004215 Carbon black (E152) Substances 0.000 claims abstract description 13
- 239000007859 condensation product Substances 0.000 claims abstract description 13
- 229930195733 hydrocarbon Natural products 0.000 claims abstract description 13
- 150000002430 hydrocarbons Chemical class 0.000 claims abstract description 13
- 150000004945 aromatic hydrocarbons Chemical class 0.000 claims abstract description 10
- 239000011295 pitch Substances 0.000 claims description 31
- 238000003801 milling Methods 0.000 claims description 19
- 239000003795 chemical substances by application Substances 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 6
- 230000008961 swelling Effects 0.000 claims description 5
- 238000003860 storage Methods 0.000 abstract description 4
- 239000003381 stabilizer Substances 0.000 abstract 2
- 229920003048 styrene butadiene rubber Polymers 0.000 description 17
- 239000002174 Styrene-butadiene Substances 0.000 description 16
- 230000035515 penetration Effects 0.000 description 14
- 238000005204 segregation Methods 0.000 description 11
- 229920000642 polymer Polymers 0.000 description 9
- JEIPFZHSYJVQDO-UHFFFAOYSA-N ferric oxide Chemical compound O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 7
- 150000001875 compounds Chemical class 0.000 description 6
- 238000013461 design Methods 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 5
- 206010042674 Swelling Diseases 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 3
- 244000043261 Hevea brasiliensis Species 0.000 description 2
- -1 aromatic hydroxy compound Chemical class 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 229920003052 natural elastomer Polymers 0.000 description 2
- 229920001194 natural rubber Polymers 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 239000004816 latex Substances 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- 238000010907 mechanical stirring Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000007965 rubber solvent Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229920002725 thermoplastic elastomer Polymers 0.000 description 1
Abstract
The present invention relates to a method for manufacturing rubber modified asphalt. The present invention has one manufacturing method that (1), rubber and asphalt are refined into condensation products of modified asphalt according to the density and the weight ratio of 100: 50 to 500; (2), condensation products of the modified asphalt in the step (1) are added in hot asphalt, are added with aromatic hydrocarbon and/or condensed nuclear hydrocarbon of stabilizers to be stirred and dispersed, and are processed by a colloid mill. The present invention has the other manufacturing method that (a), part of rubber modifiers and asphalt are refined into condensation products of the modified asphalt according to density; (b), the rest of asphalt and the rubber are stirred, the temperature is raised to 150 DEG C-200 DEG C, and the rubber is sufficiently swelled; (c), the condensation products of the modified asphalt in the (a) step are thrown into the rubber asphalt in the (b) step, are added with aromatic hydrocarbon and/or condensed nuclear hydrocarbon of stabilizers, are stirred and dispersed, and are processed by the colloid mill. The modified asphalt prepared by the methods provided by the present invention has good storage stability, and simultaneously the quality index and the application performance of the modified asphalt are greatly enhanced.
Description
Technical field
The present invention relates to the manufacture method of rubber modified asphalt.
Technical background
Modifying asphalt is meant additives (properties-correcting agent) such as admixture rubber, resin, high molecular polymer, levigated rubber powder or other fillers, or take measures such as pitch mild oxidation processing, the performance that makes pitch or pitch driving fit thing is improved and the pitch binding substances made.And road modified asphalt generally is meant polymer modified asphalt, and the polymkeric substance that is used for modification can be divided three classes usually, i.e. thermoplastic elastomer class, rubber-like and resene.Present domestic and international application polymer modifiers the most widely is polystyrene-butadiene-styrene (hereinafter to be referred as SBS rubber) and styrene-butadiene rubber(SBR) (hereinafter to be referred as SBR rubber).Except directly throw-in play is processed on a small quantity properties-correcting agent such as SBR latex, the consistency of most of rubber-like properties-correcting agent and road bitumen is all bad, so must take special processing mode, properties-correcting agent is dispersed in the pitch fully, could produce modifying asphalt.Domesticly for a long time the research and extension of modifying asphalt being made slow progress, mainly is because immature on the modifying asphalt manufacture method, and as only adopting conventional mechanical stirring mode, so that processing effect is not obvious, has had a strong impact on the development of modifying asphalt.Therefore, the manufacture method of modifying asphalt has become the key of development modifying asphalt.The manufacture method that is used at present polymer modified asphalt both at home and abroad mainly contains four classes, i.e. parent method, directly throw-in play, mechanical mixing method, colloid milling and high speed shear method, and parent method wherein, colloid milling and high speed shear method are present domestic and international application manufacture method the most widely.The parent ratio juris is to adopt a kind of appropriate means preparation to be processed into high dosage polymer modified asphalt parent earlier, mixes the rare modifying asphalt use that becomes to require dosage of auxiliary tone with matrix pitch again.The parent method can adopt solvent method and banburying legal system to be equipped with modified asphalt matrix.The advantage of parent method is that the dispersion of polymer modifiers in parent pitch is more even.The ultimate principle that colloid milling and high speed shear legal system are equipped with modifying asphalt is to force properties-correcting agent is smashed by the grinding and the shearing force of special machineries such as colloidal mill and high-speed shearing equipment, make properties-correcting agent fully be distributed in the matrix pitch, rubber modifier is bloated through melting usually, disperse levigately, continue to grow three phases.The advantage of colloid milling and high speed shear method is that the processing work efficiency is higher.But no matter be parent method or colloid milling and high speed shear method, the weakness of their maximums is a rubber modifier segregation problem.The modifying asphalt that the parent method is prepared is to mix in the reprocessing process of joining with the pitch dilution, and properties-correcting agent nearly all can be emanated, the unstable of its storage has a strong impact on modified effect, owing to generally can only take on-the-spot system to join, the method of site operation can not adapt to large-scale industrial production.And colloid milling and high speed shear legal system are equipped with modifying asphalt, need add stablizer equally when modified asphalt manufacturing, preventing the segregation of properties-correcting agent rubber, but also fail to be solved preferably.
The manufacture method that the purpose of this invention is to provide a kind of rubber modified asphalt, the modifying asphalt that this method makes has good storage stability, by dosage and the composition combination of regulating stablizer, can not only prevent that rubber modifier from emanating from pitch, and under basic maintenance modifying asphalt softening temperature and penetration degree technical indicator situation, improve low temperature extension property etc. significantly, improved the quality index and the application performance of modifying asphalt largely.
Technology contents
The manufacture method of a kind of rubber modified asphalt provided by the invention (implementation method 1) comprises the steps:
(1), properties-correcting agent rubber and pitch were dropped in the Banbury mixer banburying 30～90 minutes by 100: 50～500 weight ratio, make the modifying asphalt condensation product earlier;
(2), in temperature is 140 ℃～190 ℃ heated bitumen, add the modifying asphalt condensation product that step (1) makes, admixture stablizer aromatic hydrocarbons and/or hydrocarbon with condensed rings, the control rubber content is 2～15% of a gross weight, the content of stablizer is 0.1～6% of gross weight, 140 ℃～190 ℃ dispersed with stirring of temperature 30～60 minutes, after milling treatment of colloid promptly gets rubber modified asphalt.
The manufacture method (implementation method 2) of another kind of rubber modified asphalt comprises the steps:
(a), part rubber modifier and pitch were dropped in the Banbury mixer banburying 30～90 minutes by 100: 50～500 weight ratio, make the modifying asphalt condensation product;
(b), the control total rubber content accounts for 2～15% of gross weight, with all the other pitches and rubber elevated temperature to 150 ℃～200 ℃ under whipped state, and keep and made the abundant swelling of rubber in 15～30 minutes;
(c), the modifying asphalt condensation product that (a) step is made drops in the rubber asphalt of (b) step, add stablizer aromatic hydrocarbons and/or hydrocarbon with condensed rings, the content of stablizer is 0.1～6% of gross weight, continued dispersed with stirring 30～60 minutes down for 140 ℃～190 ℃ in temperature, after milling treatment of colloid promptly gets rubber modified asphalt.
Rubber used among the present invention can be selected from rubber general in the ordinary rubber modifying asphalt, as SBR rubber, and SBS rubber, various polymer modifiers such as ground rubber or their mixture.The rubber that uses in (1) of implementation method 1 step can be rubber and with the bitumen compatibility relative preferably rubber bad with bitumen compatibility; The rubber that uses in (a) step of implementation method 2 especially can be the rubber bad with bitumen compatibility, as reclaimed rubber, SBR rubber, star-shaped sbs rubber, the rubber that uses in (b) of implementation method 2 step especially can relative rubber preferably with bitumen compatibility, as type SBS rubber etc.
Stablizer is aromatic hydrocarbons and/or hydrocarbon with condensed rings, especially can be hydrocarbon with condensed rings.Preferred molecular weight is 200～600 aromatic hydrocarbons and/or hydrocarbon with condensed rings.Generally can adopt industrial said heavy aromatics compound, wherein containing a small amount of alkane derivative also is acceptable.Stablizer rises and improves rubber and bitumen compatibility, prevents rubber modifier isolating effect from pitch.
The consumption of stablizer preferred 0.5～2%.
The method provided by the invention neither parent method with traditional is identical, not identical with traditional colloid milling and high speed shear method yet, but combine the principal advantages of two kinds of manufacture method, application by stablizer simultaneously, make the modifying asphalt that makes have good storage stability etc., can not only prevent that rubber modifier from emanating from pitch, and under basic maintenance modifying asphalt softening temperature and penetration degree technical indicator situation, improve the low temperature extension property significantly, improved the quality index and the application performance of modifying asphalt largely.
By implementation method 1 technical process and be used the prepared performance of modified bitumen index of stablizer in table 1:
Table 1: by the prepared performance of modified bitumen index of method 1
| Sequence number | Pitch (umber) | Rubber (umber) | Stablizer (umber) | Performance index | |||
| Softening temperature (℃) | Extensibility (Cm) | Penetration degree (0.1mm) | The segregation softening temperature poor (℃) | ||||
| 1 | 100 | 0 | 0 | 44 | 6.03 | 128.2 | / |
| 2 | 100 | SBR：5.0 | 1.3 | 50.3 | 169 | 103.2 | 2.1 |
| 3 | 100 | SBS：4.5 | 0 | 55.2 | 23.6 | 68.3 | 23.2 |
| 4 | 100 | SBS：4.5 | 0.7 | 55.0 | 39.5 | 69.8 | 2.9 |
| 5 | 100 | SBS：5.0 | 1.5 | 70.6 | 46.2 | 59.2 | 2.3 |
| 6 | 100 | Reclaimed rubber: 6 SBS:3.0 | 1.0 | 55.9 | 19.8 | 78.4 | 2.0 |
| 7 | 100 | SBS：3.6 SBR：1.2 | 1.1 | 60.2 | 46.5 | 70.3 | 1.8 |
| 8 | 100 | SBS：3.6 SBR：1.2 | 0 | 61.1 | 30.2 | 71.4 | 19.3 |
Penetration degree in the table 1 (25 ℃), ductility (5 ℃, 5cm/min, cm), softening temperature (℃), the segregation softening temperature poor (℃) press the method mensuration shown in the JTJ036-98.Pitch is 100
#Pitch, SBS are star-like rubber.The stablizer aromatic hydroxy compound of attaching most importance to, molecular-weight average 400.
We can see from table 1, adopt the invention process method 1 prepared modifying asphalt can not only prevent that rubber modifier from emanating from pitch, and under basic maintenance modifying asphalt softening temperature and penetration degree technical indicator situation, improve the low temperature extension property significantly, improved the quality index and the application performance of modifying asphalt largely.
List in the table 2 by implementation method 2 prepared performance of modified bitumen indexs
Table 2 is by the prepared performance of modified bitumen index of implementation method 2
| Sequence number | Pitch (umber) | Rubber (umber) | Stablizer (umber) | Performance index | |||
| Softening temperature (℃) | Extensibility (Cm) | Penetration degree (0.1mm) | The segregation softening temperature poor (℃) | ||||
| 1 | 100 | 0 | 0 | 44.5 | 6.4 | 109 | / |
| 2 | 100 | Natural rubber: 3.6 SBS:2.3 | 0.9 | 60.3 | 32.5 | 66.1 | 2.5 |
| 3 | 100 | SBR：1.0 SBS：3.7 | 1.3 | 62.3 | 40.3 | 69.5 | 2.0 |
| 4 | 100 | SBR：1.0 SBS：3.7 | 0 | 62.5 | 31.1 | 68.9 | 25.6 |
| 5 | 100 | Reclaimed rubber: 6 SBS:2.5 | 1.1 | 54.5 | 26.1 | 89.7 | 1.9 |
| 6 | 100 | Reclaimed rubber: 6 SBS:2.5 | 0 | 54.9 | 16.6 | 88.4 | 12.3 |
Penetration degree in the table 2 (25 ℃), ductility (5 ℃, 5cm/min, cm), softening temperature (℃), the segregation softening temperature poor (℃) press the method mensuration shown in the JTJ036-98.Pitch is 70
#Pitch; The stablizer aromatic hydroxy compound of attaching most importance to, molecular-weight average 400; Banburying is 85～90 minutes in natural rubber, star-like SBR rubber, the reclaimed rubber input Banbury mixer, makes the modifying asphalt condensation product; Type SBS rubber then is equipped with in the reactor of machine mixer under the whipped state elevated temperature to 150 ℃～156 ℃ and keeps 25～30 minutes swelling treatment one.
We can see from table 2, adopt the invention process method 2 prepared same prepared modifying asphalts of modifying asphalt can not only prevent that rubber modifier from emanating from pitch, and under basic maintenance modifying asphalt softening temperature and penetration degree technical indicator situation, improve the low temperature extension property equally significantly, improved the quality index and the application performance of modifying asphalt largely.
The manufacture method of rubber modified asphalt provided by the invention and relevant auxiliary agent, adopt two kinds of technical process:
1) with SBR, SBS, the banburying in Banbury mixer of various polymer modifiers such as ground rubber or their mixture elder generation becomes the high dense body of modifying asphalt, dilute with heated bitumen then, add relevant stablizer, stir with the standard machinery stirrer, use milling treatment of colloid at last, obtain to require the stable modifying asphalt of dosage.
2) at SBR rubber that will be bad with bitumen compatibility, star-shaped sbs rubber, the banburying in Banbury mixer of various polymer modifiers such as ground rubber or their mixture elder generation becomes in the high dense body of modifying asphalt, under another reactor whipped state, carry out bitumen compatibility relatively better rubber such as type SBS modified rubber solvent swell, then with the two driving fit in reactor, add relevant stablizer after, continue to stir, after milling treatment of colloid, obtain to require the stable modifying asphalt of rubber dosage.
Adopt manufacture method of the present invention, made the original parent method that adopts separately, colloid milling and high speed shear method can not carry out the optimum combination between the different rubber clones of technical finesse or improve effect etc. becoming possibility.In addition, the present invention also provides the relevant stablizer of supporting manufacture method.Adopt this stablizer, can not only prevent that rubber modifier from emanating from pitch, and under basic maintenance modifying asphalt softening temperature and penetration degree technical indicator situation, improved modifying asphalt low temperature extension property significantly, improved the quality index and the application performance of modifying asphalt largely.
Embodiment
Following umber all by weight.
Embodiment 1
200 part 70
#Pitch, 100 parts of SBR rubber place Banbury mixer 155 ℃～160 ℃ following banburyings of temperature 35～40 minutes.Take out above-mentioned high dense modifying asphalt body 120g through banburying while hot and be equipped with in the reactor of whipping appts in one, add 100 of about 130 ℃ of 800g temperature
#Heated bitumen and 1.0g stablizer (heavy aromatics compound molecular-weight average 350), stirred 55～60 minutes for 160 ℃～165 ℃ in temperature, through milling treatment of colloid, acquisition SBR content is 4.3% modifying asphalt then, and its basic mechanical design feature index is penetration degree (25 ℃ of 0.1mm): 113.2, (5 ℃ of ductilities, 5cm/min, cm): 139, softening temperature (℃): 49.7, the segregation, softening temperature poor (℃): 1.8.
Embodiment 2
200 part 70
#Pitch, 200 parts of star-shaped sbs rubber place Banbury mixer 150 ℃～155 ℃ following banburyings of temperature 45～50 minutes.Take out above-mentioned high dense modifying asphalt body 100g through banburying while hot and be equipped with in the reactor of whipping appts in one, add 100 of about 140 ℃ of 950g temperature
#Heated bitumen and 1.5g stablizer (heavy aromatics compound molecular-weight average 360), stirred 35～40 minutes for 170 ℃～175 ℃ in temperature, through milling treatment of colloid, acquisition SBS content is 4.8% modifying asphalt then, and its basic mechanical design feature index is penetration degree (25 ℃ of 0.1mm): 63.2, (5 ℃ of ductilities, 5cm/min, cm): 39.1, softening temperature (℃): 69.2, the segregation, softening temperature poor (℃): 2.5.
Embodiment 3
300 part 100
#Pitch, 20 parts of SBR rubber, 80 parts of star-shaped sbs place Banbury mixer 150 ℃～155 ℃ following banburyings of temperature 50～55 minutes.Take out above-mentioned high dense modifying asphalt body 160g through banburying while hot and be equipped with in the reactor of whipping appts in one, add 70 of about 130 ℃ of 600g temperature
#Heated bitumen and 1.5g stablizer (heavy aromatics compound molecular-weight average 400), stirred 30 minutes for 180 ℃～185 ℃ in temperature, through milling treatment of colloid, the acquisition total rubber content is 5.3% modifying asphalt then, and its basic mechanical design feature index is penetration degree (25 ℃ of 0.1mm): 73.2, (5 ℃ of ductilities, 5cm/min, cm): 38.9, softening temperature (℃): 70.2, the segregation, softening temperature poor (℃): 2.3.
Embodiment 4
200 parts of 70# pitches, 100 parts of SBR rubber place Banbury mixer 163 ℃～165 ℃ following banburyings of temperature 60 minutes, prepare high dense modifying asphalt body.Be equipped with one and add 70 of about 130 ℃ of 1500g temperature in the reactor of whipping appts
#Heated bitumen, with 40g type SBS rubber, elevated temperature to 190 under whipped state～195 ℃ are also kept and were made the abundant swelling of rubber in 25～30 minutes, add high dense modifying asphalt body of 100g and 1.5g stablizer (heavy aromatics compound molecular-weight average 460), stirred 45～50 minutes for 186 ℃～190 ℃ in temperature, then through milling treatment of colloid, the acquisition total rubber content is 4.5% modifying asphalt, its basic mechanical design feature index is penetration degree (25 ℃ of 0.1mm): 83.2, ductility (5 ℃, 5cm/min, cm): 42.1, softening temperature (℃): 55.2, the segregation, softening temperature poor (℃): 2.0.
Embodiment 5
200 part 70
#Pitch, 200 parts of reclaimed rubbers place Banbury mixer 185 ℃～190 ℃ following banburyings of temperature 60 minutes, prepare high dense modifying asphalt body.Be equipped with one and add 100 of about 130 ℃ of 800g temperature in the reactor of whipping appts
#Heated bitumen, type SBS rubber with 30g, elevated temperature to 170 ℃ under whipped state～175 ℃ is also kept and was made the abundant swelling of rubber in 30 minutes, add high dense modifying asphalt body of 100g and 1.0g stablizer (heavy aromatics compound molecular-weight average 430), stirred 57～60 minutes for 180 ℃～183 ℃ in temperature, then through milling treatment of colloid, the acquisition total rubber content is 8.6% modifying asphalt, its basic mechanical design feature index is penetration degree (25 ℃ of 0.1mm): 83.2, ductility (5 ℃, 5cm/min, cm): 26.5, softening temperature (℃): 56.7, the segregation, softening temperature poor (℃): 1.7.
Claims (9)
1, a kind of manufacture method of rubber modified asphalt comprises the steps:
(1), properties-correcting agent rubber and pitch were dropped in the Banbury mixer banburying 30～90 minutes by 100: 50～500 weight ratio, make the modifying asphalt condensation product earlier;
(2), in temperature is 140 ℃～190 ℃ heated bitumen, add the modifying asphalt condensation product that step (1) makes, admixture stablizer aromatic hydrocarbons and/or hydrocarbon with condensed rings, the control rubber content is 2～15% of a gross weight, the content of stablizer is 0.1～6% of gross weight, 140 ℃～190 ℃ dispersed with stirring of temperature 30～60 minutes, after milling treatment of colloid promptly gets rubber modified asphalt.
2,, it is characterized in that at described stablizer be hydrocarbon with condensed rings according to the method described in the claim 1.
3,, it is characterized in that being selected from molecular weight at described stablizer is 200～600 aromatic hydrocarbons and hydrocarbon with condensed rings according to the method described in claim 1 or 2.
4,, it is characterized in that the consumption at described stablizer is 0.5～2% according to the method described in claim 1 or 2.
5, a kind of manufacture method of rubber modified asphalt comprises the steps:
(a), part rubber modifier and pitch were dropped in the Banbury mixer banburying 30～90 minutes by 100: 50～500 weight ratio, make the modifying asphalt condensation product;
(b), the control total rubber content accounts for 2～15% of gross weight, with all the other pitches and rubber elevated temperature to 150 ℃～200 ℃ under whipped state, and keep and made the abundant swelling of rubber in 15～30 minutes;
(c), the modifying asphalt condensation product that (a) step is made drops in the rubber asphalt of (b) step, add stablizer aromatic hydrocarbons and/or hydrocarbon with condensed rings, the content of stablizer is 0.1～6% of gross weight, continued dispersed with stirring 30～60 minutes down for 140 ℃～190 ℃ in temperature, after milling treatment of colloid promptly gets rubber modified asphalt.
6,, it is characterized in that the rubber that uses is selected from the reclaimed rubber bad with bitumen compatibility, SBR rubber, star-shaped sbs rubber in described (a) step according to the method described in the claim 5; The rubber that uses in (b) step is selected from the relative rubber of type SBS preferably with bitumen compatibility.
7,, it is characterized in that at described stablizer be hydrocarbon with condensed rings according to the method described in claim 5 or 6.
8,, it is characterized in that being selected from molecular weight at described stablizer is 200～600 aromatic hydrocarbons and hydrocarbon with condensed rings according to the method described in claim 5 or 6.
9,, it is characterized in that the consumption at described stablizer is 0.5～2% according to the method described in claim 5 or 6.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB021148007A CN1149264C (en) | 2002-01-29 | 2002-01-29 | Method for producing rubber modified asphalt |
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|---|---|---|---|
| CNB021148007A CN1149264C (en) | 2002-01-29 | 2002-01-29 | Method for producing rubber modified asphalt |
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| CN1149264C true CN1149264C (en) | 2004-05-12 |
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| CN101265363B (en) * | 2007-11-29 | 2010-09-15 | 陕西长大博源公路养护科技有限公司 | Waste and old rubber powder modifying asphalt and preparation method thereof |
| CN101538409B (en) * | 2008-03-21 | 2011-04-20 | 北京化工大学 | Waste Crumb rubber modified asphalt preparation method |
| CN102382479A (en) * | 2010-08-27 | 2012-03-21 | 安徽三缔沥青材料有限公司 | Star-shaped modified emulsified asphalt and preparation method of same |
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