CN1213106C - Modified asphalt and preparing method thereof - Google Patents
Modified asphalt and preparing method thereof Download PDFInfo
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- CN1213106C CN1213106C CN 02144951 CN02144951A CN1213106C CN 1213106 C CN1213106 C CN 1213106C CN 02144951 CN02144951 CN 02144951 CN 02144951 A CN02144951 A CN 02144951A CN 1213106 C CN1213106 C CN 1213106C
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Abstract
The present invention relates to modified asphalt with high quality and a preparation method thereof. The modified asphalt composition contains asphalt stock with the penetration degree of 140 to 170 1/10mm, softeners of lubex, etc. containing rich aroma and deficient wax, and modifiers of SBS. The PG level of the prepared modified asphalt is PG70 to 34. In the preparation process, the asphalt stock is blended into substratum asphalt with the penetration degree of 180 to 210 1/10mm by softeners, the modifiers are added, and the modified asphalt of the present invention is prepared by high-speed shearing at the temperature of 130 to 180 DEG C. Compared with the prior art, the modified asphalt of the present invention has the advantages of wide raw material resources, low cost, and good high temperature stability and low temperature crack resistance performance. The modified asphalt of the present invention is mainly used for paving expressways, urban traffic arterial roads, airport runways, etc. for areas with large temperature difference in winter and summer.
Description
Technical field
The present invention relates to a kind of modifying asphalt and preparation method thereof, particularly adopt high quality road bitumen of polymer modification and preparation method thereof.
Background technology
In the bigger area of summer in the winter temperature difference, winter temperature can be lower than-30 ℃, and then be higher than 30 ℃ summer, and pavement temperature also will be below or above free air temperature usually, and particularly summer, noon branch road surface top temperature can reach about 60 ℃.In the bigger area of these limit temperature difference, bituminous pavement is prone to bellding and rut in summer, is prone to diseases such as cracking winter, has a strong impact on traffic safety and service life of road surface.The major cause that above-mentioned disease occurs is that the scope of road environment temperature variation has exceeded between the viscoelastic region of road tar.The approach that solves should be to improve bituminous high-temperature stability and low-temperature cracking-resistance, widens between its viscoelastic region.Generally adopt styrene-butadiene-styrene (SBS) that matrix pitch is implemented modification at present and reach this purpose.
SBS its specific structure composition has determined that it is that numerous high molecular polymers that are used for modifying asphalt have the properties-correcting agent that improves the high and low temperature performance concurrently.A large number of experiments show that: when the add-on of SBS was in scope (4～6%) usually, the character of matrix pitch still was the principal element that determines modifying asphalt character.During the matrix pitch of softer when selecting for use (penetration degree is bigger), the low-temperature performance of the modifying asphalt that makes is better, otherwise when selecting the matrix pitch of hard (penetration degree is less) for use, the high-temperature behavior of the modifying asphalt that makes is better.And will produce all good, the superior in quality modifying asphalt of high and low temperature performance the time, then not only will be to soft, the hard degree of matrix pitch, but also to very high requirement all be arranged to its interior quality etc.Because under structural capacity and various natural cause effect, the high-temperature stability and the low-temperature cracking-resistance that make general pitch have mutual contradiction concurrently are difficult.At the limit temperature difference bigger regional making motorway, Urban traffic major trunk roads and airfield runway etc., generally all need to design maximum operation (service) temperature and be 60 ℃～70 ℃, minimum use temperature for below-30 ℃, promptly PG grade (the pitch assessment item in the SHRP content) be all good modifying asphalts of PG64-34 or this class high and low temperature performance of PG70-34.From the use temperature interval, the PG70-34 modifying asphalt with its comparing of the non-modifying asphalt of same penetration degree scope, high temperature index has improved about 20～35 ℃, the low temperature index has reduced approximately below-10 ℃, the use temperature interval has been widened about 30～45 ℃.CN1289801A makes modifying asphalt with pitch, compatilizer, reaction promoter and SBS.When the SBS add-on was 5 weight %, the softening temperature of modifying asphalt was 88.5 ℃, and high temperature index might reach the requirement of PG70-34, but its brittle point only is about-17 ℃, had only reduced by 3～5 ℃ than general matrix pitch, failed to reach the requirement of low temperature index.
(press the pitch of the Q/SHR003-1998 of China PetroChemical Corporation standard production with high-quality pavement pitch, be called for short No. 1 pitch of China Petrochemical Industry, its quality is equivalent to Esso pitch) be matrix pitch, through the SBS modification, can make the modifying asphalt of performance near above-mentioned requirements.But use high-quality road bitumen like this as matrix pitch, following shortcoming is arranged: 1) the source shortage of matrix pitch.At present, it is limited to be used to produce this class bituminous crude oil kind, and they itself are exactly the ideal product of making motorway, and its quantity can not be met the need of market far away always.2) several specified crude oil cost height: produce this class high-quality pavement pitch, need be to 1) is carried out single defeated single refining, can guarantee its purity.Sometimes sacrificed also that yield or qualities a kind of or several products are that cost guarantees its quality in the whole processing scheme of crude oil.3) restriction is strong: for can not produce said high-quality pavement bituminous producer, produce this class modifying asphalt and will not know where to begin.And, both made when having selected for use penetration number pitch very desirable, that be of high quality to be used for modification separately, though the physical index of modifying asphalt and PG grade can reach requirement, the leading indicator in the test mixture, not ideal enough as Marshall stability etc., even can not be qualified.
Summary of the invention
At the deficiencies in the prior art, the object of the present invention is to provide that a kind of high temperature performance is good, cost is low, to meet the PG grade be modified asphalt composite of PG70-34 and preparation method thereof to quality product.
Modifying asphalt of the present invention comprises asphalt stock 88%～91% by weight, and tenderizer 2%～5% is preferably 4%～5%, and SBS 4%～6%, modifying asphalt auxiliary agent 0.1%～3%.It is 70 ℃, the minimum use temperature needs for-34 ℃ of laying of roadway that modifying asphalt of the present invention can satisfy the design maximum operation (service) temperature.
Wherein asphalt stock is penetration degree 140～170 1/10mm, be preferably in the various asphalt stocks between 150～160 1/10mm, as being one or more the mixture in the processing of cycloalkanes-intermediate base or the naphthenic base crude vacuum residuum, solvent deoiling pitch, oxidized bitumen, blending pitch that obtain, wax content (distillation method) should be less than 4 weight %, preferably less than 3 weight %.
Tenderizer is lubex, solvent extraction heavy deasphalted oil, the initial boiling points such as catalytically cracked oil after handling are greater than 370 ℃, divide content greater than 50 weight % more preferably greater than 380 ℃, fragrance in forming, preferably can be greater than 60 weight %, wax content (distillation method) less than 4 weight %, preferably less than one or more the mixture among the rich fragrant poor wax component of 3 weight %.
Asphalt stock and tenderizer constitute matrix pitch jointly, and the matrix pitch penetration degree after two kinds of component blendings of pitch and tenderizer is controlled at 180～210 1/10mm, is preferably between 190～200 1/10mm.
The modifying asphalt auxiliary agent is one or more the mixture among sulphur and organic sulfide linking agent, organo-peroxide linking agent, the resene linking agent.
SBS is a styrene content 20%～40%, molecular weight is 1 * 10
5～4 * 10
5Between line style and the terpolymer of star-like conjugated diolefine.
Modified asphalt preparation method of the present invention is, with penetration degree 140～170 1/10mm, the asphalt stock and the tenderizer blending that are preferably between 150～160 1/10mm are matrix pitch, and the penetration degree of control matrix pitch is 180～210 1/10mm, is preferably between 190～200 1/10mm.Then polymkeric substance and modifying asphalt auxiliary agent are added in the matrix pitch, under 130～180 ℃ of temperature condition, obtained modified bitumen product of the present invention in 20～120 minutes with 1000～2800 rev/mins of high speed shear mixing.
Find by great deal of experimental, penetration degree is that the asphalt stock of 140～170 1/10mm is that penetration degree is the matrix pitch between 180～210 1/10mm with specific tenderizer blending, after adding the SBS modification of 4 weight %～6 weight %, the high and low temperature performance of product can well be taken into account, and leading indicator with low cost, multinomial far surpass with its at the I-A of same penetration degree level shelves bituminous index request.Modifying asphalt of the present invention avoids using high quality asphalt to meet the road bitumen of PG grade as PG70-34 as raw material production, and the pitch of selecting for use a kind of character to suit, be easy to obtain is main raw material, and product has excellent high-temperature stability and low-temperature cracking-resistance.Product preparation method of the present invention is simple, can also can prepare at the construction field (site) in plant produced.Product of the present invention is mainly used in winter, summer temperature difference larger area making motorway, Urban traffic major trunk roads and airfield runway etc.
Embodiment
Embodiment one:
With 910 parts of penetration degrees is that 168 1/10mm wax contents are that to subtract the blending of three-way extraction oil be the matrix pitch of penetration degree 205 1/10mm for the vacuum residuum of intermediate base crude oil of 2.78 weight % and lubricating oil phenol treating that 30 parts of wax contents are 2.81 weight %, remain on and add 4303 type SBS and 21 parts of 1301 type SBS that Yueyang petro-chemical corporation produces that 38 parts of Yanshan Petrochemical companies produce under 150 ℃ of temperature, 1 part of elemental sulfur is the modifying asphalt auxiliary agent, mixed 20 minutes at 1400 rev/mins rotating speed down cuts, the property detection of the modifying asphalt that makes as a result example in table 1.
Embodiment two:
With 895 parts of penetration degrees be 145 1/10mm wax contents be the vacuum residuum of cycloalkanes-intermediate base crude oil of 2.93 weight % and solvent deasphalting that 44 parts of wax contents are 2.43 weight % heavily the de-oiling blending make the matrix pitch that penetration degree is 185 1/10mm, remain on and add 4201 type SBS and 29 parts of 1301 type SBS that Yueyang petro-chemical corporation produces that 19 parts of Maoming petro-chemical corporations produce under 165 ℃ of temperature, 11 parts of resol and 2 parts of diaryl disulphide are as the modifying asphalt auxiliary agent, mixed 35 minutes at 1800 rev/mins rotating speed down cuts, the property detection of the modifying asphalt that makes as a result example in table 1.
Embodiment three:
With 891 parts of penetration degrees is that 154 1/10mm, wax content are the butane de-oiled asphalt of the naphthenic base crude of 1.63 weight %, with 46 parts of wax contents be that 2.83 weight %, initial boiling point are that 430 ℃ catalytically cracked oil is mixed into the matrix pitch that penetration degree is 194 1/10mm, remain on and add 40 parts of star-shaped sbs and 18 parts of type SBSs under 155 ℃ of temperature, 3 parts of zinc oxide and 2 parts of elemental sulfurs are as the modifying asphalt auxiliary agent, mixed 45 minutes at 1600 rev/mins rotating speed down cuts, the property detection of the modifying asphalt that makes as a result example in table 1.As can be seen from Table 1, every leading indicator of the modifying asphalt of embodiment one, embodiment two and embodiment three preparations is all more than needed many than the JTJ036-98 of China the Ministry of Communications technical requirements.Wherein softening temperature, 5 ℃ of ductilities, the penetration ratio after recovery of elasticity and the rotating thin film baking oven test (RTFOT), the surplus capacity of 5 ℃ of indexs such as ductility are especially obvious.The penetration number of embodiment two modifying asphalts is under the situation less than technical requirements, the low temperature index still can satisfy the requirement of PG70-34, explanation is used for production high-quality modified pavement asphalt with the matrix pitch of the inventive method preparation, certain excess room is still arranged, and this will help full scale plant and realize steadily producing.
Can also be seen that by table 1 softening temperature of the modifying asphalt of embodiment one, embodiment two and embodiment three preparations all is higher than 80 ℃, brittle point is equal to or less than-38 ℃, and the two differs more than 120 ℃, and the PG test-results shows that product all reaches the PG70-34 grade.
Table 1
| Test subject | Standard-required | Embodiment one | Embodiment two | Embodiment three | |
| Penetration degree (25 ℃), 1/10mm | ＞100 | 109 | 91 | 103 | |
| 5 ℃ of ductilities, cm | ＞50 | 83 | 71 | 67 | |
| Softening temperature (ring and ball method), ℃ | ＞45 | 84 | 82 | 87 | |
| Segregation, ℃ | ＜2.5 | 0.8 | 1.3 | 1.8 | |
| Kinematic viscosity (135 ℃), Pas | ＜3 | 1.75 | 1.96 | 2.4 | |
| Recovery of elasticity (25 ℃), % | ＞55 | 99 | 99 | 99 | |
| Solubleness (trieline), % | ＞99 | 99.9 | 99.9 | 99.9 | |
| Flash-point (opening), ℃ | ＞230 | ＞230 | ＞230 | ＞230 | |
| Brittle point, ℃ | ＜-38 | ＜-38 | -38 | ||
| Behind the RTF OT | Mass loss, % | ＜1.0 | 0.03 | -0.08 | 0.14 |
| Penetration ratio, % | ＞50 | 79.8 | 87 | 83 | |
| Recovery of elasticity (25 ℃), % | 99 | 99 | 98 | ||
| 5 ℃ of ductilities, cm | ＞30 | 78 | 69 | 61 | |
| The PG test-results | High temperature index, ℃ | 70 | 70 | 70 | |
| Desired value, Pa | ＞2200 | 2246 | 2287 | 2319 | |
| The low temperature index, ℃ | -34 | -34 | -34 | ||
| The S value, MPa | 252 | 269 | 277 | ||
| The m value | ＞0.300 | 0.328 | 0.317 | 0.324 | |
| The PG grade | PG70-34 | PG70-34 | PG70-34 | ||
Claims (9)
1, a kind of modified asphalt composite is characterized in that comprising by weight following component:
Asphalt stock 88%～91%,
Tenderizer 2%～5%,
SBS 4％～6％，
Modifying asphalt linking agent 0.1%～3%;
Described tenderizer be meet initial boiling point greater than 370 ℃, fragrance in forming divide lubex, solvent extraction heavy deasphalted oil that content requires less than 4 weight % greater than 50 weight %, wax content, one or more mixture among the catalytically cracked oil after handling.
2, according to the described modified asphalt composite of claim 1, the content that it is characterized in that described tenderizer is 4%～5%.
3,, it is characterized in that the high and low temperature index of described modifying asphalt is respectively 70 ℃ and-34 ℃ according to the described modified asphalt composite of claim 1.
4, according to the described modified asphalt composite of claim 1, the penetration degree that it is characterized in that described asphalt stock is 140～170 1/10mm.
5, according to the described modified asphalt composite of claim 1, the penetration degree that it is characterized in that described asphalt stock is 150～160 1/10mm.
6, according to claim 1,4 or 5 described modified asphalt composites, it is characterized in that described asphalt stock is one or more the mixture in the vacuum residuum that obtains of cycloalkanes-intermediate base crude oil or naphthenic base crude processing, solvent deoiling pitch, oxidized bitumen, the blending pitch, wax content is less than 4 weight %.
7,, it is characterized in that described modifying asphalt linking agent is one or more the mixture among elemental sulfur linking agent, organic sulfide linking agent, organo-peroxide linking agent, the resene linking agent according to the described modified asphalt composite of claim 1.
8, the preparation method of the described modified asphalt composite of a kind of claim 1, it is characterized in that adopting following process: by the described composition proportioning of claim 1, asphalt stock and the tenderizer blending of penetration degree 140～170 1/10mm are matrix pitch, the penetration degree of control matrix pitch is 180～210 1/10mm, then polymkeric substance and modifying asphalt linking agent are added in the matrix pitch, under 130～180 ℃ of temperature condition, obtained modified bitumen product in 20～120 minutes with 1000～2800 rev/mins rotating speed high speed shear.
9, in accordance with the method for claim 8, it is characterized in that described asphalt stock penetration degree is 150～160 1/10mm, the penetration degree of described matrix pitch is 190～200 1/10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02144951 CN1213106C (en) | 2002-12-19 | 2002-12-19 | Modified asphalt and preparing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02144951 CN1213106C (en) | 2002-12-19 | 2002-12-19 | Modified asphalt and preparing method thereof |
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|---|---|
| CN1508188A CN1508188A (en) | 2004-06-30 |
| CN1213106C true CN1213106C (en) | 2005-08-03 |
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| CN 02144951 Expired - Lifetime CN1213106C (en) | 2002-12-19 | 2002-12-19 | Modified asphalt and preparing method thereof |
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| CN101289578B (en) * | 2007-04-17 | 2012-04-25 | 上海建设机场道路工程有限公司 | Modified bitumen and bituminous mixture |
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| CN108219824A (en) * | 2018-01-16 | 2018-06-29 | 黄河三角洲京博化工研究院有限公司 | A kind of SBS modified pitch cosolvent and preparation method thereof |
| CN110437630B (en) * | 2018-05-04 | 2021-08-06 | 中国石油化工股份有限公司 | Polymer modified asphalt and preparation method thereof |
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| CN110872446B (en) * | 2018-08-30 | 2021-11-09 | 中国石油化工股份有限公司 | Modified road asphalt and preparation method thereof |
| CN111777864A (en) * | 2020-06-05 | 2020-10-16 | 中石油江苏燃料沥青有限责任公司 | Production process of modified asphalt |
| CN114426412B (en) * | 2020-10-29 | 2023-03-24 | 中国石油化工股份有限公司 | Asphalt pavement sealing material and preparation method and application thereof |
| CN113022044B (en) * | 2021-03-20 | 2022-01-04 | 新京喜(唐山)建材有限公司 | Elastomer modified asphalt waterproof coiled material and preparation process thereof |
| CN115521629A (en) * | 2022-10-25 | 2022-12-27 | 江苏天诺道路材料有限公司 | Maintenance special asphalt and preparation method thereof |
-
2002
- 2002-12-19 CN CN 02144951 patent/CN1213106C/en not_active Expired - Lifetime
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| CN1508188A (en) | 2004-06-30 |
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