CN104559240A - Modified asphalt compounded by gelatine powder/polymer, and preparation method of modified asphalt - Google Patents
Modified asphalt compounded by gelatine powder/polymer, and preparation method of modified asphalt Download PDFInfo
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- CN104559240A CN104559240A CN201310496067.4A CN201310496067A CN104559240A CN 104559240 A CN104559240 A CN 104559240A CN 201310496067 A CN201310496067 A CN 201310496067A CN 104559240 A CN104559240 A CN 104559240A
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Abstract
The invention discloses modified asphalt compounded by gelatine powder/a polymer, and a preparation method of the modified asphalt. The modified asphalt is prepared from the following components in percentage by weight: 72.2%-88.9% of substrate asphalt, 0%-8% of a compatilizer, 8%-13% of a waste rubber powder, 2%-3.5% of a polymer, 0.1%-0.3% of a polymer stabilizer, 0.5%-1.5% of a rubber powder stabilizing agent I, and 0.5%-1.5% of a rubber powder stabilizing agent II. The preparation method comprises the following steps: (1) adding the compatilizer and the polymer to the melted substrate asphalt to be uniformly mixed, and then adding the stabilizing agent I to perform uniformly mixing: (2) adding the waste rubber powder and the stabilizing agent II to the materials of the compatilizer, the polymer, the substrate asphalt and the stabilizing agent I in the step (1) to perform uniformly mixing, and then adding a stabilizing agent III for uniformly mixing so as to obtain the modified asphalt compounded by the gelatine powder/the polymer. The modified asphalt disclosed by the invention has favorable high-low temperature resistance, favorable ageing resistance, favorable fatigue resistance and simple preparation technology, and is suitable for industrialized production.
Description
Technical field
The present invention relates to a kind of preparation method of modified asphalt for pavement, specifically a kind of rubber powder and polymer composite modified asphalt and preparation method thereof.
Background technology
SBS modifying asphalt, as the principal item of polymer modified asphalt, can significantly improve high temperature Rut resistance, low temperature cracking resistance ability and strengthen the performances such as anti-aging, improvement is tired, have been widely recognized and apply.But SBS is expensive, domestic SBS price is about 20,000 yuan/ton, and import SBS price is higher.Closely adopt the Study and appliance of waste Crumb rubber modified asphalt in widespread attention during the last ten years.Reason is as follows: 1, can reduce a large amount of waste rubber material environmental pollution; 2, waste Crumb rubber cheap (80 order shoddies about more than 3000 yuan/ton); 3, waste Crumb rubber modified asphalt has and can reduce road rumble, absorbs light to extenuate the incomparable advantage of the modified pitch of high polymer such as high light is dazzling.
Waste Crumb rubber modified asphalt mostly adopts dry method and wet method two kinds of techniques.Dry method is that rubber powder is added in aggregate, and then adds asphalt production compound, and this method and technology content is lower, at present seldom research and use.Wet method is under the high temperature conditions, adds the rubber powder of 5% ~ 25% in pitch, by mixing, dispersing apparatus modification and the special modifying asphalt of one prepared.The in situ method that wet method is divided into again the storage time very short and the longer factory law of stably stored time requirement, the production difficulty of the latter is comparatively large, and wherein topmost reason requires very high to rubber powder and the consistency of pitch or the stability in storage of rubber powder modified asphalt.
At present, the principal element of restriction rubber powder modified asphalt application is except hot storage stability, also has the use properties of waste rubber powder modified asphalt, test proves, simple use waste Crumb rubber comes with some shortcomings, as: add-on is improved limited to high temperature performance of asphalt very little, be embodied in that softening temperature is low, recovery of elasticity is little, low temperature (5 DEG C) extensibility is little.Add-on makes again the dispersion of rubber powder in pitch uneven too greatly, and add-on conference makes modifying asphalt viscosity too large in addition, not from pumping and construction.Therefore the rubber powder modified asphalt preparing the properties excellence of steady heat storage is the direction of current rubber powder modified asphalt development.
Patent discloses the method that some improve and improve the stability of waste Crumb rubber modified asphalt both at home and abroad.As added coupling agent, compatilizer, activator etc.CN 1441005A adopts epoxidation polybutene, glytidyl methacrylate, glycidyl methacrylate or maleic acid to improve the stability in storage of desulfurization waste Crumb rubber pitch.CN101089049A discloses a kind of waste rubber tyre powder modified asphalt and preparation method thereof, take polymkeric substance as compatilizer, add methacrylate and salt, Racemic glycidol, thanomin and salt, Zinc Stearate or stearic acid, add emulsifying agent again, but limited to the improved stability of rubber powder modified asphalt.US 5704971 adopts hydrogen peroxide to be oxidized by waste Crumb rubber.CN1528823A adopts two-stage method preparation technology, by power " principles of chemistry ", waste Crumb rubber is effectively degraded.CN101104739A adopts the mode of high speed shear to degrade rubber powder, and then crosslinked, improves the stability in storage of product.CN1597782A discloses a kind of composition and method of making the same of microwave exposure waste rubber powder modification highway asphalt, and this patent does not relate to hot storage stability index.
Above-mentioned patent is limited to shoddy improved stability by adding coupling agent, compatilizer, emulsifying agent etc. merely, and reason is that waste Crumb rubber belongs to inert material, and the available active group of vulcanized rubber powder is little.And the mechanical force sheared for a long time can make waste rubber powder modified asphalt degradation, production efficiency is low, is not suitable for suitability for industrialized production.Extruded by rubber powder, last granulation, the method makes the complicated process of preparation of waste rubber powder modified asphalt, and cost increases.The desulfurization of waste Crumb rubber is the fracture that sulfide linkage is cross-linked site, and desulfurization can not make closely highly cross-linked waste rubber produce the unnecessary cross-link bond supplying to be cross-linked.Adding the linking agents such as sulphur, that waste Crumb rubber itself or waste Crumb rubber can not be made to occur with pitch is crosslinked, therefore waste Crumb rubber more difficult in heated bitumen stable existence.
CN101585969A discloses a kind of thermoplastic styrene butadiene rubber+tire glue powder composite modified asphalt and preparation method thereof, and the standby composite modified asphalt of this patent system is limited to and is used in the shear strength that tack coat improves interlayer.The SBS amount added is comparatively large, and cause viscosity comparatively large, be unfavorable for pumping and construction, the thermostability of waste rubber powder modified asphalt does not also relate to.CN101555355A discloses a kind of Crumber rubber modified asphalt, which disclose and adopt waste Crumb rubber, SBS and PE to prepare composite modified asphalt, the stablizer adopted is titanate ester or silicone based stablizer, in patent, restriction adopts desulfurization rubber powder, and how stablizer works in composite modified asphalt is not also set forth.CN101550276A Crumber rubber modified asphalt and preparation thereof, which disclose and adopt 20-40 order shoddy, polystyrene particle, matrix pitch, the efficient priming reaction agent of polyalkylbenzene phenol disulphide, sulphur stablizer to join in matrix pitch, be prepared into stable performance, the modifying asphalt of emanating does not occur.This patent advantage have employed thick rubber powder, but need to adopt shears strong shear 2 hours in preparation process, and this will inevitably cause the excessive heat of pitch aging, and the character of waste rubber powder modified asphalt does not illustrate yet.
Summary of the invention
For the deficiencies in the prior art, the invention provides a kind of rubber powder/polymer composite modified asphalt.Modifying asphalt of the present invention has good high temperature performance, ageing resistance and anti-fatigue performance, and preparation technology is simple, is applicable to suitability for industrialized production.
Rubber powder/polymer composite modified asphalt of the present invention, with modifying asphalt mass percent, comprises following component:
Matrix pitch 72.2% ~ 88.9%;
Waste Crumb rubber 8% ~ 13%;
Compatilizer 0.5% ~ 8%;
Polymkeric substance 2% ~ 3.5%;
Stablizer I 0.1% ~ 0.3%;
Stablizer II 0.5% ~ 1.5%;
Stablizer III 0.5% ~ 1.5%.
Described matrix pitch is penetration degree (25 DEG C) is 60 ~ 140 1/10mm, and extensibility (15 DEG C) is greater than heavy traffic paving asphalt or the blend asphalt of 150cm.
Described waste Crumb rubber granularity 60 ~ 200 order, preferably 60 ~ 80 orders.
Described compatilizer be subtract three lines, subtract four lines extract out oil or furfural extract oil in one or more mixtures.
Described polymkeric substance can be linear or star-shaped sbs, one or more in PSBR or SBR, the preferably mixture of linear SBS or SBR or linear SBS and SBR.
Described stablizer I is one or more mixtures of sulphur, sulfide and sulfur donor.
Described stablizer II is a kind of compound coordination non-ionic type organoboron compound, and molecular formula is: R
1-O-B (Dn)-OR
2, boron atom centered by B in formula, O is Sauerstoffatom, R
1can be the alkyl of 2 ~ 4 carbon atoms, R
2be the alkyl of 8 ~ 22 carbon atoms, acyloxy, Dn can form the group of part with central atom boron, as the alcohol amine groups containing 2 ~ 3 carbon atoms, and alkene or monocycle, polycyclic aromatic hydrocarbons that carbonatoms is greater than 3.Commercially available prod can be selected also can to prepare according to prior art, as SPE-1, SB-181 of Qingdao thinking Chemical Manufacture.
Described stablizer III is the mixture of one or more of stearic acid, oleic-acid, is selected from one or more in potassium stearate, ammonium stearate, ammonium oleate or potassium oleate.
The preparation method of rubber powder/polymer composite modified asphalt of the present invention, comprises following content:
(1) compatilizer, polymkeric substance are joined in the matrix pitch of molten state, at 160 ~ 170 DEG C, mix 20 ~ 60 minutes, be warming up to 170 ~ 190 DEG C, mix 0.5 ~ 1 hour, add stablizer I, mix 2 ~ 4 hours;
(2) waste Crumb rubber and stablizer II are joined in the material of step (1), at 175 ~ 195 DEG C, mix 0.5 ~ 2 hour, then add stablizer III, continue mixing 0.5 ~ 3 hour, obtain rubber powder/polymer composite modified asphalt.Wherein, described mixing process adopts the technique means such as conventional mechanical stirring, high-shear or colloidal mill to carry out.
Compared with prior art, the present invention has following features: shoddy is under the synergy of stablizer II and stablizer III, and stable existence forms spacial framework in polymkeric substance such as SBS or SBR in pitch, adding of organoboron compound further enhancing the steady state of polymkeric substance in pitch medium, and organoboron compound central atom " boron " and the strengthening agent carbon black in rubber powder, the atomicity of white carbon black closely, it is convenient to be combined with white carbon black and carbon black, firmly, make rubber powder, polymkeric substance and asphalt modification asphalt system are combined closely, stablizer III generates a large amount of micro-bubble under mechanical shearing or stirring action, be filled in the space of network structure, prevent the sinking of useless rubber in pitch, and the bubble long-time stable that stablizer III can be made to produce exists, the two is mutually collaborative, effectively can ensure the long-term stability of Crumber rubber modified asphalt system.
Rubber powder/polymer composite modified asphalt of the present invention has good high temperature performance, ageing resistance, anti-fatigue performance, and properties meets " SBS I-C " technical indicator in " JTG F40-2004 " completely; In modifying asphalt, polymer loading is few, and cost is low, modest viscosity, is conducive to the conveying of pump, and preparation technology is simple, is applicable to suitability for industrialized production.
Embodiment
Below will the present invention is further illustrated by means of embodiment, but following examples are not construed as limiting the invention.The percentage composition of wherein said material is mass percentage, take modified bitumen product as benchmark.
Embodiment 1
By penetration degree (25 DEG C, 0.1mm) Zhenghai pitch (78.3%) of 80, call in furfural after heat fused and extract (4.5%) out, SBS(YH-791 Yueyang petrochemical industry of 3% is added at 160 ~ 170 DEG C) shear 40 minutes, stir 30 minutes at 180 ~ 185 DEG C, the sulphur simple substance adding 0.2% stirs 2 hours.Add SB-181(Qingdao Siwei Chemical Co., Ltd. of 80 order shoddies (11%) and 1.5%), stir 1 hour at 180 ~ 185 DEG C, add the ammonium oleate of 1.5% again, continue stirring 1 hour, finally shear 30 minutes again, obtain rubber powder/polymer composite modified asphalt composition, product characteristics is in table 1.
Embodiment 2
By penetration degree (25 DEG C; 0.1mm) Zhenghai matrix pitch (79.77%) of 71; furfural extract oil (6.5%) is called in after heat fused; SBS(YH-791H Yueyang petrochemical industry of 3.5% is added at 160 ~ 170 DEG C) shear 30 minutes; stir 50 minutes at 185 ~ 190 DEG C, the tetramethyl-thiuram disulfide adding 0.23% stirs 2.5 hours.Add SB-181(Qingdao Siwei Chemical Co., Ltd. of 60 order waste Crumb rubbers (8%) and 1.0%), stir 0.5 hour at 175 ~ 180 DEG C, add the potassium oleate of 1.0% again, continue stirring 1.5 hours, finally grind 40 minutes again, obtain rubber powder/polymer composite modified asphalt composition, product characteristics is in table 1.
Embodiment 3
By penetration degree (25 DEG C; 0.1mm) Zhenghai matrix pitch (82.8%) of 126; oil extracted out by four lines that subtract of calling in 1% after heat fused; the SBR(1500 Lanzhou Petrochemical of 3% is added at 160 ~ 170 DEG C) shear 30 minutes; stir 40 minutes at 170 ~ 175 DEG C, the dithiodimorpholine adding 0.2% continues stirring 2 hours.Add SPE-1(Qingdao Siwei Chemical Co., Ltd. of 80 order waste Crumb rubbers (11%) and 1.0%), stir 1.5 hours at 170 ~ 175 DEG C, add the ammonium stearate of 1.0% again, continue stirring 1 hour, finally grind 20 minutes again, obtain rubber powder/polymer composite modified asphalt composition, product characteristics is in table 1.
Embodiment 4
With embodiment 3, difference is in the SBS(YH-791H Yueyang petrochemical industry adding 2%) and 1% SBR(1502 Lanzhou Petrochemical), product characteristics is in table 1.
Comparative example 1
By penetration degree (25 DEG C; 0.1mm) Zhenghai matrix pitch (90.7%) of 80; oil extracted out by four lines that subtract of calling in 4.5% after heat fused; SBS(YH-791H Yueyang petrochemical industry of 4.5% is added at 160 ~ 170 DEG C) shear 40 minutes; stir 40 minutes at 180 ~ 185 DEG C; the elemental sulfur adding 0.3% stirs 4 hours, and obtained SBS modifying asphalt, product characteristics is in table 1.
Comparative example 2
By penetration degree (25 DEG C; 0.1mm) Zhenghai matrix pitch (79.27%) of 71; furfural extract oil (6.5%) is called in after heat fused; SBS(YH-791H Yueyang petrochemical industry of 3.5% is added at 160 ~ 170 DEG C) shear 30 minutes; stir 50 minutes at 185 ~ 190 DEG C, the sulphur simple substance adding 0.23% stirs 2.5 hours.Add the potassium octadecanate of 80 order waste Crumb rubbers (8%) and 2.5%, stir 2 hours at 175 ~ 180 DEG C, finally shear again or grind 30 minutes, obtained composite modified asphalt, product characteristics is in table 1.
Comparative example 3
By penetration degree (25 DEG C; 0.1mm) Zhenghai matrix pitch (79.27%) of 71; furfural extract oil (6.5%) is called in after heat fused; SBS(YH-791H Yueyang petrochemical industry of 3.5% is added at 160 ~ 170 DEG C) shear 30 minutes; stir 50 minutes at 185 ~ 190 DEG C, the sulphur simple substance adding 0.23% stirs 2.5 hours.Add SPE-1(Qingdao Siwei Chemical Co., Ltd. of 80 order waste Crumb rubbers (8%) and 2.5%), stir 1.5 hours at 170 ~ 175 DEG C, finally shear again or grind 30 minutes, obtained composite modified asphalt, product characteristics is in table 1.
The character of modifying asphalt in table 1 embodiment and comparative example.
As can be seen from Table 1, composite modified asphalt property indices prepared by the present invention not only meets SBS I-C technical requirement completely, but also is better than the polymer modified asphalt of the identical trade mark.
Claims (10)
1. rubber powder/polymer composite modified asphalt, with modifying asphalt mass percent, comprises following component:
Matrix pitch 72.2% ~ 88.9%;
Waste Crumb rubber 8% ~ 13%;
Compatilizer 0.5% ~ 8%;
Polymkeric substance 2% ~ 3.5%;
Stablizer I 0.1% ~ 0.3%;
Stablizer II 0.5% ~ 1.5%;
Stablizer III 0.5% ~ 1.5%;
Wherein, described stablizer I is one or more mixtures of sulphur, sulfide and sulfur donor;
Described stablizer II is a kind of compound coordination non-ionic type organoboron compound;
Described stablizer III is the mixture of one or more of stearic acid, oleic-acid.
2. according to modifying asphalt according to claim 1, it is characterized in that: 25 DEG C of penetration degrees of described matrix pitch are 60 ~ 140 1/10mm, extensibility (15 DEG C) is greater than 150cm.
3. according to modifying asphalt according to claim 1, it is characterized in that: described waste Crumb rubber granularity 60 ~ 200 order.
4., according to modifying asphalt according to claim 1, it is characterized in that: described compatilizer be subtract three lines, subtract four lines extract out oil or furfural extract oil in one or more mixtures.
5. according to modifying asphalt according to claim 1, it is characterized in that: described polymkeric substance is linear or star-shaped sbs, one or more in PSBR or SBR.
6. according to modifying asphalt according to claim 1, it is characterized in that: the molecular formula of described stablizer II is: R
1-O-B (Dn)-OR
2, boron atom centered by B in formula, O is Sauerstoffatom, R
1can be the alkyl of 2 ~ 4 carbon atoms, R
2be the alkyl of 8 ~ 22 carbon atoms, acyloxy, Dn is part, is selected from the alcohol amine groups containing 2 ~ 3 carbon atoms, alkene or monocycle, polycyclic aromatic hydrocarbons that carbonatoms is greater than 3.
7. according to modifying asphalt according to claim 1, it is characterized in that: described stablizer III is one or more in potassium stearate, ammonium stearate, ammonium oleate or potassium oleate.
8. a preparation method for rubber powder/polymer composite modified asphalt according to claim 1, is characterized in that comprising following content: compatilizer, polymkeric substance join in the matrix pitch of molten state and mix by (1), then adds stablizer I and mixes; (2) waste Crumb rubber and stablizer II are joined in the material of step (1) mix, then add stablizer III and mix, obtain rubber powder/polymer composite modified asphalt.
9. in accordance with the method for claim 8, it is characterized in that: compatilizer, the polymkeric substance mixing condition in pitch is: be 160 ~ 170 DEG C in temperature and mix 20 ~ 60 minutes, be then warming up to 170 ~ 190 DEG C, mix 0.5 ~ 1 hour; The mixing condition adding stablizer I is: temperature is 170 ~ 190 DEG C, mixes 2 ~ 4 hours.
10. in accordance with the method for claim 8, it is characterized in that: by the mixing condition of waste Crumb rubber and stablizer II be: mixing temperature is 175 ~ 195 DEG C, mixing time is 0.5 ~ 2 hour; The mixing condition adding stablizer III is: mixing temperature is 175 ~ 195 DEG C, mixing time 0.5 ~ 3 hour.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105017789A (en) * | 2015-08-05 | 2015-11-04 | 丁德凤 | Compound modified asphalt and preparation method thereof |
| CN105733281A (en) * | 2016-03-09 | 2016-07-06 | 盘锦华冠中交路星道路沥青有限公司 | Heating type modified asphalt high-molecular polymer crack pouring adhesive and method for preparing same |
| CN105778532A (en) * | 2016-03-09 | 2016-07-20 | 盘锦华冠中交路星道路沥青有限公司 | Cold-patch crack pouring adhesive and method for preparing same |
| CN105802258A (en) * | 2016-03-09 | 2016-07-27 | 盘锦华冠中交路星道路沥青有限公司 | Pitch modified by high-viscosity and high-elasticity body and preparation method of pitch |
| CN108559290A (en) * | 2018-05-15 | 2018-09-21 | 唐水金 | A kind of Low-viscosity asphalt |
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| CN101041725A (en) * | 2006-03-24 | 2007-09-26 | 陈书怡 | Reproduction new method for waste elastomer and plastic |
| WO2011057443A1 (en) * | 2009-11-16 | 2011-05-19 | 江苏宝利沥青股份有限公司 | Polymer modified asphalt and preparation method thereof |
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| CN1830646A (en) * | 2004-10-09 | 2006-09-13 | 陈民铎 | Regeneration method of waste elastic body |
| CN101041725A (en) * | 2006-03-24 | 2007-09-26 | 陈书怡 | Reproduction new method for waste elastomer and plastic |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105017789A (en) * | 2015-08-05 | 2015-11-04 | 丁德凤 | Compound modified asphalt and preparation method thereof |
| CN105733281A (en) * | 2016-03-09 | 2016-07-06 | 盘锦华冠中交路星道路沥青有限公司 | Heating type modified asphalt high-molecular polymer crack pouring adhesive and method for preparing same |
| CN105778532A (en) * | 2016-03-09 | 2016-07-20 | 盘锦华冠中交路星道路沥青有限公司 | Cold-patch crack pouring adhesive and method for preparing same |
| CN105802258A (en) * | 2016-03-09 | 2016-07-27 | 盘锦华冠中交路星道路沥青有限公司 | Pitch modified by high-viscosity and high-elasticity body and preparation method of pitch |
| CN105733281B (en) * | 2016-03-09 | 2018-04-13 | 盘锦华冠中交路星道路沥青有限公司 | A kind of heated type modified pitch high molecular polymer base joint grouting glue and preparation method thereof |
| CN108559290A (en) * | 2018-05-15 | 2018-09-21 | 唐水金 | A kind of Low-viscosity asphalt |
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