CN1923902A - Preparation method of rubber powder modified bitumen adapted for industrial production - Google Patents
Preparation method of rubber powder modified bitumen adapted for industrial production Download PDFInfo
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Abstract
The invention discloses a preparing method of modified gel tar for industrial manufacturing, which comprises the following steps: (1) blending 20-70% gel powder and tar under 120-180 deg.c; adding gel powder in the tar under 140-250 deg.c; cutting; stirring; blending for 1-4h; preparing modified tar of mother material gel powder; (2) heating the mother material to fuse at 140-180 deg.c; adding tar or composition of tar, polymer and stabilizer; making the content of gel powder at 5-20% under 140-230 deg.c; cutting; stirring; mixing for 0.5-3h to obtain the product.
Description
Technical field
The invention belongs to the modified asphalt technology field, relate to a kind of preparation method who is applicable to industrial rubber powder modified asphalt.
Background technology
As everyone knows, petroleum pitch has many good performances as the by-product of refining of petroleum, has now become main paver and water-proof material in the fields such as highway, airport, building at present.But also there are a series of deficiencies in pitch itself, deliquescing during as high temperature, low temperature become fragile, performances such as ageing-resistant, antifatigue are all bad, must carry out modification to pitch in order to satisfy actual needs, wherein polymer modified asphalt because obviously reduce the bituminous temperature sensitivity, improve elasticity, toughness, viscosity, antifatigue and a series of performances such as aging, become topmost method at present.Polymer modified asphalt mainly comprises polymkeric substance and rubber powder modified asphalt.Polymer modified asphalt has obtained widespread use, the technology comparative maturity, and rubber powder modified asphalt is a new technology that grows up under environment protection and the background that economizes on resources.
Rubber powder modified asphalt developed country abroad just began one's study and uses as far back as the sixties in last century, the CharlesMcDonald early start uses waste rubber powder modified asphalt, the usefulness that is used for road repair, be referred to as asphalt rubber (asphalt-rubber AR), the eighties begins a large amount of research and development later on, is used widely in building in that highway is auxilliary after the nineties.Developed countries is explored through long-term, proves that proof rubber powder modified asphalt laying highway has series of advantages.Easy as production technique, cost is low; Raw material sources are abundant, and are cheap; Construction technology is identical with plain asphalt; Auxilliary road surface of establishing has advantages such as good stability, wear-resisting, durable, antifreeze, anti-skidding, noise reduction sound and maintenance cost are low, and the P/C ratio has very remarkable advantages.
Rubber powder is through sulfurized rubber, generate three-dimensional space network by chemical bond, and contain carbon black and various compound, composition is very complicated, than general more difficult swelling and the dispersions in pitch of simple linear polymer such as rubber (as SBR, NR, BR etc.), plastics (PE, PP, EVA etc.) and thermoplastic elastomer SBS commonly used, cause the package stability of rubber powder modified asphalt very poor thus, the modifying asphalt effect is limited, therefore, the key issue of modification is at first to make the rubber powder degraded, so that can be dispersed in the pitch uniformly and stably.Abroad patent proposes following main several method and technology makes the rubber powder degraded in recent years: (1) (150-300 ℃) stirring under higher temperatures makes degraded (patent 6,387,965) with organic solvent or aromatic hydrocarbon oil with rubber powder; And the thermal rectification that rubber powder and light asphalt are added under high temperature (300 ℃) that proposes is recently degraded rubber powder.(2) bubbling air and add auxiliary agent at high temperature utilizes airborne oxygen and auxiliary agent oxidative degradation rubber powder.(3) rubber powder is mixed with hydrogen peroxide, utilize its strong oxidizing property, make rubber powder degraded (patent 5,704,971,5,851,276).When these methods all existed price height, complex process, rubber powder degraded, the shortcoming of deterioration also took place in asphalt performance.(4) the high level rubber powder is joined in the pitch, be mixed with the high density modifying asphalt through high speed shear and high temperature, and the rubber powder modified asphalt of the shelf-stable that can obtain degrading (patent wo9414896, wo9728220).This method is simple and effective, has solved rubber powder degraded and scattering problem, but just the stability of rubber powder modified asphalt has been studied, and other performance and the production technique of modifying asphalt do not related to.
Summary of the invention
Purpose of the present invention just provides a kind of industrial rubber powder modified asphalt preparation method and technology of being applicable to.Characteristics such as the modifying asphalt of preparation has shelf-stable, excellent property, and cheap, and preparation technology is simple.
Technical solution of the present invention is, a kind of preparation method who is applicable to industrial rubber powder modified asphalt, and this preparation method is divided into two sections, and step is:
(1) fs, preparation rubber powder modified asphalt masterbatch:
A. by weight percentage, rubber powder with 20～70% and pitch under 120～180 ℃ of temperature, are extruded mixing by screw mixes equipment, make pre-composition,
B. by weight percentage, be that the pre-composition of 10～60% rubber powders joins in the pitch with content, under 140～250 ℃ of temperature, shear agitation was mixed 1～6 hour, made the rubber powder modified asphalt masterbatch;
(2) subordinate phase, preparation rubber powder modified asphalt product:
With the rubber powder modified asphalt masterbatch 140～180 ℃ of heat fused, according to performance requriements, add a certain amount of pitch or add pitch, polymkeric substance and stablizer, the content that makes rubber powder is 5～20%, polymkeric substance and stablizer can add step by step, also can add simultaneously, under 140～230 ℃ of temperature, shear agitation was mixed 0.5～3 hour, was met the different rubber powder modified asphalt products that require.
Described rubber powder is produced by waste tire, and tire comprises vehicle tires such as car, motorbus, agricultural vehicle, truck.Rubber powder adopts normal temperature crushing up, normal temperature auxiliary agent comminuting method, normal temperature wet pulverization method to produce, and by the activated rubber powder that these rubber powders process physics and chemical process surface modification form, is of a size of 20～100 orders.Physical method comprises mixing rubber powder mixed with assistant activator by mechanically milling, mechanically mixing, high speed machine and activates; Chemical method comprises that by graft reaction, preparation interpenetrating polymer networks, polymer overmold, reactive gas processing, chlorination reaction, sulfonation reaction, microwave and gamma-rays processing etc. vulcanized rubber powder being carried out modification activates.
Described polymkeric substance is synthetic rubber BR, synthetic rubber SBR, synthetic rubber EPR, EPDM, natural rubber NR; Thermoplastic elastomer SBS, thermoplastic elastic SEBS, thermoplastic elastic SIS; Plastics PE, plastics PP, plastics PS, plastic pvc, plastics EVA; Synthetic rubber BR, SBR, EPR, EPDM right and wrong are oil-filled or oil-filled; Thermoplastic elastomer SBS, SEBS, SIS are line styles or star-like, and PS content is 10～40%; Plastics PE, PP, PS, EVA, PVC can be waste or used plastics,
The polymkeric substance add-on can be a kind of polymkeric substance between 0～10%, also can be two or more polymkeric substance.
Described stablizer is a sulphur, modifying asphalt is stabilizing agent specially used or sulphur and thiazoles, inferior sulphonyl class, thiurams, guanidine class rubber are used with promotor, and sulphur and promotor weight ratio are 1: 1～4: 1, the stablizer add-on between 0.1～10%,
Used pitch is petroleum pitch, be distillation pitch, oxidized bitumen, solvent pitch or the pitch that is in harmonious proportion, grade meet defined among " the asphalt highway construction technique normalizing JTG F40-2004 " of Chinese transportation portion song cloth in, light and heavy-duty road asphalt technical requirements.
Described pre-mixing equipment is that screw rod is extruded mixing equipment, can be single screw rod, also can be twin screw.The shear agitation mixing equipment is colloidal mill, blade whipping device.
The invention has the beneficial effects as follows, shelf-stable, excellent property, and also cheap, preparation technology is simple.
Embodiment
Fs, the preparation of rubber powder modified asphalt masterbatch.
Embodiment 1.Rubber powder is a normal temperature crushing up, or the production of normal temperature auxiliary agent comminuting method, be of a size of 40 orders.Join in the pre-mixing equipment by the pitch (grade AH-90) and the 0.5kg rubber powder of charging opening, extrude, mix 150 ℃ of even sliverings of following Preblend with the 1kg fusing.
Embodiment 2.The pre-composition of embodiment 1 preparation and the pitch of fusing are together joined in the colloidal mill, and making rubber powder content is 30%.Stir in 180 ℃ of following high speed shear of temperature, mixing time was respectively 2 hours, 2.5 hours and 3 hours.Dilution back test levels softening temperature, the result shows that the difference of softening temperature is all less than 2.5, the rubber powder modified asphalt masterbatch has good stability, and sees Table 1.
Table 1 masterbatch stability
| Masterbatch mixing time/h | Stability/℃ (7d) |
| 2 | 2.2 |
| 2.5 | 1.7 |
| 3 | 1.2 |
Embodiment 3.The pitch and the 75kg normal temperature auxiliary agent comminuting method rubber powder of 300kg fusing are joined in the colloidal mill, stirred 4 hours in 180 ℃ of following high speed shear of temperature.
Embodiment 4.The pitch and the 720kg normal temperature auxiliary agent comminuting method rubber powder of 3000kg fusing are joined in the colloidal mill, shear in 180 ℃ of following high-speed stirring of temperature and mixed 3 hours.
Subordinate phase, preparation rubber powder modified asphalt product
Example 5-9 is for adopting the traditional method preparation, and routine 10-13 is for adopting the inventive method and prepared.
Embodiment 5.Heat fused pitch adds the rubber powder that 40 order normal temperature crushing ups are produced, and rubber powder content 15% mixed 30 minutes under 180 ℃ of temperature.Rubber powder modified asphalt to preparation carries out performance test, and penetration degree and low-temperature ductility do not reach SBS class modifying asphalt I-C grade standard in the above-mentioned technical specifications, and stores instability, the results are shown in Table 2.
Embodiment 6.With example 5, difference is that rubber powder is of a size of 80 orders.Rubber powder modified asphalt to preparation is tested, and low-temperature ductility does not reach SBS class modifying asphalt I-C grade standard, and stores instability, the results are shown in Table 2.
Embodiment 7.With example 5, difference is that rubber powder is the production of normal temperature auxiliary agent comminuting method.Low-temperature ductility does not reach SBS class modifying asphalt I-C grade standard, and stores instability, the results are shown in Table 2.
Embodiment 8.With example 5, difference is that rubber powder is an activated rubber powder.Low-temperature ductility does not reach SBS class modifying asphalt I-C grade standard, and stores instability, the results are shown in Table 2.
Embodiment 9.With example 2.Difference is to add 1.5phrSBS, and penetration degree and low-temperature ductility do not reach SBS class modifying asphalt I-C grade standard, and stores instability, the results are shown in Table 2.
Table 2, the rubber powder modified asphalt performance data
| Numbering | 25 ℃ of penetration degrees, 100g, 5s/ 0.1mm | B/ ℃ of softening temperature TR ﹠ | 5 ℃ of ductilities, 5cm/min/ cm | Package stability segregation 48h softening temperature is poor/℃ |
| 5 | 55 | 62 | 12 | 7.2 |
| 6 | 68 | 58 | 16 | 6.4 |
| 7 | 73 | 57 | 28 | Unstable |
| 8 | 72 | 59 | 20 | Unstable |
| 9 | 58 | 64 | 23.7 | Unstable |
Embodiment 10.With masterbatch (rubber powder the is a normal temperature auxiliary agent comminuting method) heat fused of embodiment 2 preparations, add pitch and make rubber powder content 12%, add 2 phr SBS again, 5 phr sulphur mixed 30-60 minute under 160-200 ℃ of temperature, obtained the rubber powder modified asphalt product.The rubber powder modified asphalt performance is tested, and penetration degree, softening temperature, low-temperature ductility all reach SBS modification C grade standard, and shelf-stable, the results are shown in Table 3, and aging resistance sees Table 4.
Table 3, the rubber powder modified asphalt performance data
| Numbering | Masterbatch mixing time/h | 25 ℃ of penetration degrees, 100g, 5s/ 0.1mm | B/ ℃ of softening temperature TR ﹠ | 5 ℃ of ductilities, 5cm/min/ cm | Package stability segregation 48h softening temperature is poor/℃ | 7 days softening temperatures of package stability segregation are poor/℃ |
| 10 | 2 | 72 | 66.7 | 35.6 | 1.2 | 2.2 |
| 10 | 2.5 | 71 | 65.9 | 35.3 | 0.5 | 1.7 |
| 10 | 3 | 71 | 66.0 | 35.2 | 0.4 | 1.2 |
| 11 | 79 | 64.9 | 32.8 | 0.5 | ||
| 12 | 76 | 64.7 | 33.1 | 2.5 | ||
| 13 | 80 | 64.8 | 35.2 | 2.0 |
Embodiment 11.With example 10, difference is that rubber powder is normal comminuting method.The rubber powder modified asphalt performance is tested, and penetration degree, softening temperature, low-temperature ductility all reach SBS modification C grade standard, and shelf-stable, the results are shown in Table 3.
Embodiment 12.With example 10, difference is the masterbatch that adopts embodiment 3 preparations.The rubber powder modified asphalt performance is tested, and penetration degree, softening temperature, low-temperature ductility all reach SBS modification C grade standard, and shelf-stable, the results are shown in Table 3.
Embodiment 13.With example 10, difference is the masterbatch that adopts embodiment 4 preparations.The rubber powder modified asphalt performance is tested, and penetration degree, softening temperature, low-temperature ductility all reach SBS modification C grade standard, and shelf-stable, the results are shown in Table 3.
Embodiment 10 aging resistance test results see Table 4.
Table 4, embodiment 10 aging resistance test datas
| After aging | |
| Mass loss | 0.77 |
| Ductility (5 ℃) | 30 |
| Softening temperature, ℃ | 67 |
| Penetration degree | 77％ |
By table as seen, aging resistance also reaches SBS modification C grade standard fully.
Embodiment 10 sees Table 5 by U.S. SHRP standard performance test result.
Table 5 rubber powder modified asphalt SHRP performance test data
| Former state pitch dynamic shearing (DSR) test | |||||
| Temperature (℃) | G*(Kpa) | δ(°) | G*/sinδ(Kpa) | ||
| 70 | 1.504 | 70.9 | 1.591 | ||
| 76 | 0.919 | 70.6 | 0.975 | ||
| Residual asphalt dynamic shearing (DSR) test behind the RTFO | |||||
| Temperature (℃) | G*(Kpa) | δ(°) | G*/sinδ(Kpa) | ||
| 64 | 5.293 | 65 | 5.839 | ||
| 70 | 3.109 | 66.2 | 3.399 | ||
| PAV residual asphalt dynamic shearing (DSR) test | |||||
| Temperature (℃) | G*(Kpa) | δ(°) | G*sinδ(Kpa) | ||
| 25 | 796.7 | 59.9 | 689.4 | ||
| PAV residual asphalt curved beam (BBR) test | |||||
| Temperature (℃) | m | St(Mpa) | |||
| -18 | 0.339 | 344 | |||
| PG：70-22 | |||||
By table as seen, performance also reaches the SHRP standard fully.
Embodiment 11 sees Table 6 by U.S. SHRP standard performance test result.By table as seen, performance also reaches the SHRP standard fully.
Table 6 rubber powder modified asphalt SHRP performance test data
| Former state pitch dynamic shearing (DSR) test | |||||
| Temperature (℃) | G*(Kpa) | δ(°) | G*/sinδ(Kpa) | ||
| 70 | 1.67 | 70.3 | 1.774 | ||
| 76 | 0.97 | 71.1 | 1.025 | ||
| Residual asphalt dynamic shearing (DSR) test behind the RTFO | |||||
| Temperature (℃) | G*(Kpa) | δ(°) | G*/sinδ(Kpa) | ||
| 70 | 2.48 | 70.0 | 2.638 | ||
| 76 | 1.40 | 71.8 | 1.474 | ||
| PAV residual asphalt dynamic shearing (DSR) test | |||||
| Temperature (℃) | G*(Kpa) | δ(°) | G*sinδ(Kpa) | ||
| 25 | 1100 | 59.9 | 951.7 | ||
| PAV residual asphalt curved beam (BBR) test | |||||
| Temperature (℃) | m | St(Mpa) | |||
| -18 | 0.463 | 84.4 | |||
| PG：70-28 | |||||
By table as seen, performance also reaches the SHRP standard fully.
Claims (7)
1, a kind of preparation method who is applicable to industrial rubber powder modified asphalt is characterized in that, this preparation method is divided into two stages, and step is:
(1) fs, preparation rubber powder modified asphalt masterbatch:
A. by weight percentage, rubber powder with 20～70% and pitch under 120～180 ℃ of temperature, are extruded mixing by screw mixes equipment, make pre-composition;
B. by weight percentage, be that the pre-composition of 10～60% rubber powders joins in the pitch with content, under 140～250 ℃ of temperature, shear agitation was mixed 1～6 hour, made the rubber powder modified asphalt masterbatch;
(2) subordinate phase, preparation rubber powder modified asphalt product:
With the rubber powder modified asphalt masterbatch 140～180 ℃ of heat fused, according to performance requriements, add a certain amount of pitch or add pitch, polymkeric substance and stablizer, polymkeric substance and stablizer can add step by step, also can add simultaneously, the content that makes rubber powder is 5～20%, under 140～230 ℃ of temperature, shear agitation was mixed 0.5～3 hour, was met the different rubber powder modified asphalt products that require.
2, a kind of preparation method who is applicable to industrial rubber powder modified asphalt according to claim 1, it is characterized in that, described rubber powder is the rubber powder of normal temperature crushing up, normal temperature auxiliary agent comminuting method, the production of normal temperature wet pulverization method, and, be of a size of 20～100 orders by the activated rubber powder that these rubber powders process physics and chemical process surface modification form.
3, a kind of preparation method who is applicable to industrial rubber powder modified asphalt according to claim 1 is characterized in that, described polymkeric substance is synthetic rubber BR, synthetic rubber SBR, synthetic rubber EPR, EPDM, natural rubber NR; Thermoplastic elastomer SBS, thermoplastic elastic SEBS, thermoplastic elastic SIS; Plastics PE, plastics PP, plastics PS, plastic pvc, plastics EVA; Synthetic rubber BR, SBR, EPR, EPDM right and wrong are oil-filled or oil-filled; Thermoplastic elastomer SBS, SEBS, SIS are line styles or star-like, and PS content is 10～40%; Plastics PE, PP, PS, EVA, PVC can be waste or used plastics.
4, according to claim 1 or 3 described a kind of preparation methods that are applicable to industrial rubber powder modified asphalt, it is characterized in that described polymkeric substance add-on can be a kind of polymkeric substance, also can be two or more polymkeric substance between 0～10%.
5, a kind of preparation method who is applicable to industrial rubber powder modified asphalt according to claim 1, it is characterized in that, described stablizer is a sulphur, modifying asphalt is stabilizing agent specially used or sulphur and thiazoles, inferior sulphonyl class, thiurams, guanidine class rubber are used with promotor, and sulphur and promotor weight ratio are 1: 1～4: 1.
6, a kind of according to claim 1 or 5 preparation method who is applicable to industrial rubber powder modified asphalt is characterized in that, described stablizer add-on is between 0.1～10%.
7, a kind of preparation method who is applicable to industrial rubber powder modified asphalt according to claim 1 is characterized in that, described pre-mixing equipment is that screw rod is extruded mixing equipment, can be single screw rod, also can be twin screw.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101565286B (en) * | 2008-04-25 | 2011-08-10 | 北京化工大学 | Method for preparing rubber powder masterbatch capable of quickly dispersing modified asphalt |
| 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 |
| CN103819918A (en) * | 2014-03-18 | 2014-05-28 | 上海交通大学 | Composite high-viscosity modified asphalt and preparation method thereof |
| CN104312173A (en) * | 2014-10-21 | 2015-01-28 | 吉林省嘉瑞沥青科技有限公司 | Rubber composite modified asphalt and preparation method thereof |
| CN104693816A (en) * | 2015-02-11 | 2015-06-10 | 江苏宝利沥青股份有限公司 | Method for preparing waterproof rubber modified asphalt and application thereof |
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| CN105384956A (en) * | 2015-12-22 | 2016-03-09 | 广西远景资源再生股份有限公司 | Rubber powder subjected to surface activation and preparation method and application thereof |
| CN106700573A (en) * | 2016-11-22 | 2017-05-24 | 西藏宝利沥青有限公司 | Preparing method of cooling polymer modified asphalt and packing method thereof |
| CN109553989A (en) * | 2018-11-08 | 2019-04-02 | 苏州拓博琳新材料科技有限公司 | A kind of SBS modified pitch auxiliary agent and SBS modified pitch |
| CN110607041A (en) * | 2019-09-20 | 2019-12-24 | 浙江江河建设有限公司 | Road asphalt additive and preparation method thereof |
| CN113480239A (en) * | 2021-08-01 | 2021-10-08 | 宫成军 | Preparation method of asphalt concrete |
| 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 |
| CN118222108A (en) * | 2024-03-26 | 2024-06-21 | 浙江顺畅高等级公路养护有限公司 | Stable rubber asphalt base sample, composite modified asphalt, and preparation method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101565286B (en) * | 2008-04-25 | 2011-08-10 | 北京化工大学 | Method for preparing rubber powder masterbatch capable of quickly dispersing modified asphalt |
| 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 |
| CN102850810B (en) * | 2012-08-27 | 2014-05-07 | 句容宁武科技开发有限公司 | Preparation method of polymer modified asphalt |
| CN103819918A (en) * | 2014-03-18 | 2014-05-28 | 上海交通大学 | Composite high-viscosity modified asphalt and preparation method thereof |
| CN104312173A (en) * | 2014-10-21 | 2015-01-28 | 吉林省嘉瑞沥青科技有限公司 | Rubber composite modified asphalt and preparation method thereof |
| CN104693816B (en) * | 2015-02-11 | 2017-06-20 | 江苏宝利国际投资股份有限公司 | A kind of preparation method and applications of water-fast rubber modified asphalt |
| CN104693816A (en) * | 2015-02-11 | 2015-06-10 | 江苏宝利沥青股份有限公司 | Method for preparing waterproof rubber modified asphalt and application thereof |
| CN105038267A (en) * | 2015-07-23 | 2015-11-11 | 柳州联海科技有限公司 | Preparing method of water-resistant pitch |
| CN105384956A (en) * | 2015-12-22 | 2016-03-09 | 广西远景资源再生股份有限公司 | Rubber powder subjected to surface activation and preparation method and application thereof |
| CN106700573A (en) * | 2016-11-22 | 2017-05-24 | 西藏宝利沥青有限公司 | Preparing method of cooling polymer modified asphalt and packing method thereof |
| CN106700573B (en) * | 2016-11-22 | 2019-03-26 | 西藏宝利沥青有限公司 | A kind of preparation method and its packing method of the polymer modified asphalt that cools down |
| CN109553989A (en) * | 2018-11-08 | 2019-04-02 | 苏州拓博琳新材料科技有限公司 | A kind of SBS modified pitch auxiliary agent and SBS modified pitch |
| CN110607041A (en) * | 2019-09-20 | 2019-12-24 | 浙江江河建设有限公司 | Road asphalt additive and preparation method thereof |
| CN113480239A (en) * | 2021-08-01 | 2021-10-08 | 宫成军 | Preparation method of asphalt concrete |
| 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 |
| CN118222108A (en) * | 2024-03-26 | 2024-06-21 | 浙江顺畅高等级公路养护有限公司 | Stable rubber asphalt base sample, composite modified asphalt, and preparation method and application thereof |
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