CN101104739A - Gelatine powder modified asphalt and processing method thereof - Google Patents
Gelatine powder modified asphalt and processing method thereof Download PDFInfo
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- CN101104739A CN101104739A CNA2007101180266A CN200710118026A CN101104739A CN 101104739 A CN101104739 A CN 101104739A CN A2007101180266 A CNA2007101180266 A CN A2007101180266A CN 200710118026 A CN200710118026 A CN 200710118026A CN 101104739 A CN101104739 A CN 101104739A
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Abstract
The invention discloses a modified asphalt and a processing method of the modified asphalt. The modified asphalt of the invention contains the following components in part by weight: 50 to 92 parts by weight of base asphalt, 8 to 50 parts by weight of rubber powder, 0.1 to 5 parts by weight of first cross-linking agent, 0 to 12 parts by weight of diluent and 0 to 6 parts by weight of second cross-linking agent. The invention develops a modified asphalt prepared through desulphurization degradation and recrosslinking and the processing method of the modified asphalt through the analysis of the conditions of selective degradation process of waste rubber powder in the asphalt, the recovery of macro molecules performance of the degraded waste rubber powder in the modified asphalt and the study on the preparation technique of the modified asphalt made of the waste rubber powder. The modified asphalt can form homogeneous mixing system, the viscosity of the asphalt is reduced and the storage stability is increased.
Description
Technical field
The present invention relates to a kind of rubber powder modified asphalt and working method thereof.
Background technology
Along with the development of communications and transportation cause, the performance of plain asphalt can not satisfy the requirement of high-grade highway.In order to improve asphalt quality, strengthen the use properties of road bitumen, various countries have developed the modifying asphalt production technology in succession.So-called modifying asphalt is meant " admixture rubber, resin, high molecular polymer, levigated rubber powder or other filler additives (properties-correcting agent), or take measures such as pitch mild oxidation processing are improved the bituminous performance and the asphalt mixture made ".Different properties-correcting agent can be in the use properties of improving pitch or asphalt in varying degrees.Waste Crumb rubber not only can reduce the bituminous temperature sensitivity, increases bituminous elasticity, and the be full of cracks of minimizing bituminous pavement and aging improves the driving safety and the service life of road surface of vehicle, and the cost of modifying asphalt is reduced significantly.Waste Crumb rubber is used for the best method that asphalt modification is internationally recognized innoxious, recycling treatment waste rubber.
Waste Crumb rubber modified asphalt mainly contains two kinds of production methods at present: wet method and dry method.Wet method is earlier waste Crumb rubber to be mixed with pitch, and the formation rubber powder modified asphalt is then rubber powder modified asphalt and gather materials and carry out heat and mix and stir and make compound.Dry method is earlier rubber powder to be joined to gather materials, and the mixing of formation is gathered materials and to be carried out heat with pitch and mix and stir and make compound.Because do not need special equipment, the expense of dry way process is low, and production result's consistence is poor, and the road of building with dry method needs often to repair.Main in the last few years abroad employing is wet-process modified, though this method of modifying makes the elasticity of rubber powder obtain application, but rubber powder is that swelling is not dissolved in the pitch at pitch in the course of processing, chemical reaction does not take place in rubber powder and pitch, the rubber powder modified asphalt that forms is heterogeneous, asphalt viscosity is higher, and the formed asphalt compound can produce the problem that is difficult to compacting.
In recent years, aspect rubber powder degraded and the vulcanized rubber powder chemical treatment some new technical study were being arranged also.CN1441005A discloses a kind of production technology of desulfurization glue powder-modified asphalt, promoted the consistency of each component in the rubber powder modified asphalt, but handle owing to need carry out pre-desulfurization to rubber powder, and then be that raw material carries out asphalt modification with the desulfurization rubber powder, the cost of raw material is higher, and its additive cross-linking effect that adopts is limited.
Summary of the invention
The purpose of this invention is to provide a kind of rubber powder modified asphalt and working method thereof with superperformance.
Rubber powder modified asphalt provided by the present invention, contain the component of following weight part:
Matrix pitch 50-92,
Rubber powder 8-50,
The first linking agent 0.1-5,
Thinner 0-12,
The second linking agent 0-6;
Described first linking agent is the mixture of sulphur and rock asphalt;
Described thinner is selected from one or more in solvent oil, furfural extract oil and the vacuum distillate;
Second linking agent is the SBS resin.
Wherein, the penetration degree of matrix pitch is 30～300dmm, and softening temperature is 30 ℃～62 ℃.The particle diameter of rubber powder is the 40-200 order.Sulphur and rock asphalt quality are not particularly limited than weight ratio in first linking agent, and weight ratio can not reach effect of the present invention by regulating addition simultaneously, is preferably 1: 0.1-10.
The working method of this modifying asphalt is heated to 185 ℃～250 ℃ with matrix pitch earlier, slowly adds rubber powder, shear agitation; Then, add first linking agent, shear agitation or colloidal mill grind once more, obtain described modifying asphalt.
Wherein, add that the temperature of described shear agitation is 165 ℃-245 ℃ before first linking agent, the time is no more than 8 hours, when adding first linking agent, can also add the thinner and/or second linking agent.
Pitch has certain desulfurization Degradation to common vulcanized rubber powder, but the desulfurization degradation effect is limited under the common process condition.In the present invention, by under the effect of mechanical forces such as 185 ℃～250 ℃ high temperature, shear agitation, having realized preferably rubber powder is carried out desulfurization.Be pointed out that be meant the some keys that cut off cross-link bond and the depolymerization reaction that produces in this said desulfurization, purpose is the state that makes elastomeric cross-linked rubber plasticization and return to original processing.And the desulfurization rubber powder so be easy to further be desulfurized degraded in pitch, is shown very high solubleness because its part macromolecular chain has interrupted.Under the linking agent effect, the rubber powder of degraded desulfurization can form reticulated structure once more in pitch.Wherein, the desulfurization rubber powder is because by partial desulfurization, and it has in pitch and distributes preferably and easily by the pitch swelling, when being used linking agent, linking agent can make desulfurization rubber powder recuperation section crosslinked, has formed reticulated structure uniformly in pitch, has improved the bituminous performance well.
The present invention passes through selectivity degradation technique condition analysis, the recovery of degraded shoddy in pitch macromole performance and the Study on Preparation Technology of waste rubber powder modified asphalt of shoddy in pitch, develop a kind of by desulfurization degraded and crosslinked again modifying asphalt and method for producing thereof, the gained modifying asphalt can form homogeneous mixture system, reduce the viscosity of modifying asphalt, and improved the package stability of product.
Compared with prior art, the present invention has following technical superiority and characteristics:
1, employing is carried out the appropriately crosslinked again chemical modifying process of desulfurization degraded earlier to rubber powder, is guaranteeing to have improved the stability of modified bitumen product than under the lower production cost.
2, adopt new linking agent prescription, improved rubber powder and bituminous consistency, significantly improved the performance of modifying asphalt.
3, the rubber powder modified asphalt of being produced is having tangible lifting aspect ductility index and the stability in storage index.
Description of drawings
Fig. 1 is the fluorescence micrograph (Figure 1A is 180 ℃, and Figure 1B is 230 ℃) of modifying asphalt under the different modification temperatures.
Embodiment
Deficiency in view of present waste rubber powder modified asphalt production, the invention provides a kind of is main properties-correcting agent with shoddy, in the modification course of processing, by adjusting process parameter and use linking agent shoddy is realized desulfurization degraded and crosslinked again, produced the modified bitumen product of excellent property.
Modifying asphalt of the present invention contains the component of following weight part:
Matrix pitch 50-92,
Rubber powder 8-50,
The first linking agent 0.1-5,
Thinner 0-12,
The second linking agent 0-6;
Wherein, matrix pitch can be vacuum residuum, straight-run pitch, also can be the various pitches such as mediation pitch that mediation technology obtains, and penetration degree (25 ℃, 0.1mm): 30～300, softening temperature is 30 ℃～62 ℃.
Rubber powder: can select commercially available various waste Crumb rubbers for use, granular size is 40 orders-200 orders.
Thinner: can be one or more of solvent oil, furfural extract oil or reduced pressure distillate wet goods.These thinners are the effect basically identical that rises in the modifying asphalt production process, and visual matrix pitch penetration degree size selectivity is added.
First linking agent: the mixture of sulphur and rock asphalt, sulphur and rock asphalt weight ratio are not particularly limited in this mixture, and its scope can be 1: 0.1-10, weight ratio can not reach effect of the present invention by regulating addition simultaneously.
Second linking agent: SBS resin (styrene/butadiene/styrene block copolymers).
Complete processing:
Earlier matrix pitch is heated to 185 ℃～more than 250 ℃, slowly add rubber powder, at high temperature shear agitation adds linking agent after for some time, stirs or colloidal mill grinds and makes modifying asphalt through high speed shear once more.Wherein the gradation of can classifying of two kinds of linking agents adds, and whole course of processing temperature of reaction is controlled between 165 ℃～250 ℃.
In the above-mentioned course of processing, the temperature of shear agitation is 165 ℃-245 ℃, and shear time is no more than 8 hours.Used shears performance is similar substantially in the modifying asphalt production process, and significant parameter is a velocity of shear, and velocity of shear is slow, and shear time can correspondingly increase, and when speed was fast, shear time can shorten, as long as make various materials energy thorough mixing evenly.
The present invention is further illustrated by means of embodiment below, and processing condition that adopt among the embodiment and proportioning only are used for summary of the invention is described further, and these technological parameters of non-limiting use.Per-cent related in the content all refers to mass percent.
Embodiment 1
(penetration degree (25 ℃ is 88 0.1mm), and softening temperature is 47) is heated to 210 ℃ (modification temperatures) earlier with 400 gram matrix pitches; Slowly add 40 order waste Crumb rubbers (100g), shear agitation 30 minutes (velocity of shear 2500rpm) through screening; Cool to 180 ℃, add first linking agent (2.5g, wherein the weight ratio of sulphur and rock asphalt is 1: 1) then, second linking agent (5g), controlled temperature is constant, and high speed shear stirred 2 hours, got modifying asphalt after the cooling.
Adopt common rubber powder modified asphalt in contrast, this modifying asphalt by comparison, softening temperature is brought up to 58 ℃ from 57 ℃, 5 ℃ of ductilities are brought up to 31.0cm from 14.5cm; Behind RTFOT (test of rotating thin film oven ageing), more common rubber powder modified asphalt is compared, and the softening temperature of this modifying asphalt changes by 4 ℃ and is reduced to 3 ℃, illustrate rubber powder modified asphalt desulfurization at high temperature degrade crosslinked again after, stability obviously improves.
The dispersion state of rubber powder in pitch relatively under embodiment 2, the different modification temperature
Different modification temperatures have bigger influence to performance of modified bitumen, adopt the proportioning of embodiment 1, select two different modification temperatures to compare: A) earlier matrix pitch is heated to 180 ℃, and then carries out ensuing modification processing; B) earlier matrix pitch is heated to 230 ℃, carries out ensuing modification processing again.
Adopt the microtexture (Figure 1A is 180 ℃ of modification temperature gained modifying asphalts, and Figure 1B is 230 ℃ of modification temperature gained modifying asphalts) of fluorescence microscope modifying asphalt.From Fig. 1 as seen, under 180 ℃ of modification temperatures, rubber is to exist with bigger bulk, and pitch is very poor to its swelling property; And under 230 ℃ of modification temperatures, because the effect of desulfurization degraded, rubber grain diminishes, and pitch is to the swelling property of rubber be improved (because the light constituent in the pitch penetrates in the rubber grain, showing as the rubber grain colour-darkening).This observations can illustrate the raising along with modification temperature, and rubber powder-asphalt system desulfurization degradation effect is obvious, helps modifying asphalt to form homogeneous mixture system preferably.
Embodiment 3
(penetration degree (25 ℃ is 68 0.1mm), and softening temperature is 49) is heated to 220 ℃ earlier with 400 gram matrix pitches; Slowly add 60 order waste Crumb rubbers (95g) then, shear agitation 30 minutes (velocity of shear 2500rpm) through screening; Cool to 185 ℃, add first linking agent (2.6g, wherein the weight ratio of sulphur and rock asphalt is 1: 0.5) then, 2% the second linking agents (10g), controlled temperature is constant, high speed shear stirred 2 hours, after the cooling modifying asphalt.
Experimental result records (25 ℃ of this modifying asphalt penetration degrees, 0.1mm) be 70, softening temperature is 58 ℃, 5 ℃ of ductilities are 34cm, place and after 30 days sample is remeasured the result and be: (25 ℃ is 75 0.1mm) to penetration degree, and softening temperature is 55 ℃, 5 ℃ of ductilities are 50cm, and product shows good preservation stability.
Embodiment 4
(penetration degree (25 ℃ is 88 0.1mm), and softening temperature is 47) is heated to 210 ℃ earlier with 400 gram matrix pitches; Slowly add 40 order waste Crumb rubbers (98g), shear agitation 30 minutes (velocity of shear 2500rpm) through screening; Cool to 180 ℃, add first linking agent (6g, wherein the weight ratio of sulphur and rock asphalt is 1: 3) then, high speed shear stirred 2 hours, got modifying asphalt after the cooling.
Gained modifying asphalt softening temperature is 57 ℃, 5 ℃ of ductility 17cm; Behind RTFOT (test of rotating thin film oven ageing), the softening temperature of modifying asphalt is 44.
Claims (8)
1. rubber powder modified asphalt, contain the component of following weight part:
Matrix pitch 50-92,
Rubber powder 8-50,
The first linking agent 0.1-5,
The second linking agent 0-6;
Thinner 0-12,
Described first linking agent is the mixture of sulphur and rock asphalt;
Second linking agent is the SBS resin;
Described thinner is selected from one or more in solvent oil, furfural extract oil and the vacuum distillate.
2. rubber powder modified asphalt according to claim 1 is characterized in that: the penetration degree of described matrix pitch is 30～300dmm, and softening temperature is 30 ℃～62 ℃.
3. rubber powder modified asphalt according to claim 1 is characterized in that: the particle diameter of described rubber powder is the 40-200 order.
4. according to the arbitrary described rubber powder modified asphalt of claim 1-3, it is characterized in that: the mass ratio of sulphur and rock asphalt is 1 in described first linking agent: 0.1-10.
5. the working method of the described rubber powder modified asphalt of claim 1 is heated to 185 ℃～250 ℃ with matrix pitch earlier, slowly adds rubber powder, shear agitation; Then, add first linking agent, shear agitation or colloidal mill grind once more, obtain described rubber powder modified asphalt.
6. working method according to claim 5 is characterized in that: the temperature of described shear agitation is 165 ℃-245 ℃.
7. according to claim 5 or 6 described working methods, it is characterized in that: when adding first linking agent, can also add the thinner and/or second linking agent.
8. according to claim 5 or 6 described working methods, it is characterized in that: the penetration degree of described matrix pitch is 30～300dmm, and softening temperature is 30 ℃～62 ℃; The particle diameter of described rubber powder is the 40-200 order.
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| CNB2007101180266A CN100567399C (en) | 2007-06-27 | 2007-06-27 | A kind of rubber powder modified asphalt and working method thereof |
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| CNB2007101180266A CN100567399C (en) | 2007-06-27 | 2007-06-27 | A kind of rubber powder modified asphalt and working method thereof |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102061100A (en) * | 2011-02-02 | 2011-05-18 | 佛山惠福化工有限公司 | Composite modifier modified road bitumen and preparation method thereof |
| 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 |
| CN102391612A (en) * | 2011-10-20 | 2012-03-28 | 河南万里路桥集团有限公司 | Anionic aqueous colorized road surface crack sealing material and preparation process thereof |
| CN102433008A (en) * | 2011-11-03 | 2012-05-02 | 黑龙江长和化工股份有限公司 | Fissure cementation glue for pavement, and preparation method for fissure cementation glue |
| CN102966018A (en) * | 2012-12-04 | 2013-03-13 | 山东泰德新能源有限公司 | Temperature-controllable paving material |
| CN102964854A (en) * | 2012-11-23 | 2013-03-13 | 山东泰德新能源有限公司 | Road asphalt modifier |
| CN104402311A (en) * | 2014-10-20 | 2015-03-11 | 山西省交通科学研究院 | Rubber powder modified asphalt mixture and preparation method thereof |
| CN104693824A (en) * | 2015-03-18 | 2015-06-10 | 中国海洋石油总公司 | Cable asphalt and preparation method thereof |
| CN105985531A (en) * | 2015-02-03 | 2016-10-05 | 吕刚 | Method for preparing asphalt modifier for various temperature conditions by using waste rubber oil and method for preparing modified asphalt |
| CN106633964A (en) * | 2016-12-22 | 2017-05-10 | 上海群康沥青科技股份有限公司 | Modified asphalt composition |
| CN107446364A (en) * | 2017-04-01 | 2017-12-08 | 江苏中路工程技术研究院有限公司 | A kind of rubber asphalt and preparation method thereof |
| CN108165032A (en) * | 2017-11-30 | 2018-06-15 | 青海弘川新源实业股份有限公司 | A kind of modified asphalt working-up device and its application method |
| CN113801489A (en) * | 2021-10-19 | 2021-12-17 | 广州高速运营管理有限公司 | Rubber powder modified asphalt for pavement repair and preparation method thereof |
| CN115306044A (en) * | 2022-10-12 | 2022-11-08 | 衡水中裕铁信防水技术有限公司 | Modified asphalt waterproof coiled material and preparation method 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 |
| CN117534371A (en) * | 2023-12-29 | 2024-02-09 | 知行良知实业股份有限公司 | High-proportion regenerated rubber asphalt mixture and preparation method thereof |
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2007
- 2007-06-27 CN CNB2007101180266A patent/CN100567399C/en active Active
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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 |
| CN102061100A (en) * | 2011-02-02 | 2011-05-18 | 佛山惠福化工有限公司 | Composite modifier modified road bitumen and preparation method thereof |
| WO2012103691A1 (en) * | 2011-02-02 | 2012-08-09 | 佛山惠幅化工有限公司 | Road asphalt modified by composite modifier and preparation method thereof |
| CN102391612A (en) * | 2011-10-20 | 2012-03-28 | 河南万里路桥集团有限公司 | Anionic aqueous colorized road surface crack sealing material and preparation process thereof |
| CN102391612B (en) * | 2011-10-20 | 2013-03-13 | 许昌金欧特沥青股份有限公司 | Anionic aqueous colorized road surface crack sealing material and preparation process thereof |
| CN102433008A (en) * | 2011-11-03 | 2012-05-02 | 黑龙江长和化工股份有限公司 | Fissure cementation glue for pavement, and preparation method for fissure cementation glue |
| CN102964854A (en) * | 2012-11-23 | 2013-03-13 | 山东泰德新能源有限公司 | Road asphalt modifier |
| CN102966018A (en) * | 2012-12-04 | 2013-03-13 | 山东泰德新能源有限公司 | Temperature-controllable paving material |
| CN102966018B (en) * | 2012-12-04 | 2015-07-29 | 山东交通学院 | A kind of preparation method of controllable temperature paveio(u)r |
| CN104402311A (en) * | 2014-10-20 | 2015-03-11 | 山西省交通科学研究院 | Rubber powder modified asphalt mixture and preparation method thereof |
| CN105985531B (en) * | 2015-02-03 | 2018-12-04 | 吕刚 | The method for preparing various temperature condition asphalt modifier and modified pitch using waste rubber oil |
| CN105985531A (en) * | 2015-02-03 | 2016-10-05 | 吕刚 | Method for preparing asphalt modifier for various temperature conditions by using waste rubber oil and method for preparing modified asphalt |
| CN104693824B (en) * | 2015-03-18 | 2016-10-12 | 中国海洋石油总公司 | A kind of cable asphalt and preparation method thereof |
| CN104693824A (en) * | 2015-03-18 | 2015-06-10 | 中国海洋石油总公司 | Cable asphalt and preparation method thereof |
| CN106633964A (en) * | 2016-12-22 | 2017-05-10 | 上海群康沥青科技股份有限公司 | Modified asphalt composition |
| CN106633964B (en) * | 2016-12-22 | 2020-03-13 | 上海群康沥青科技股份有限公司 | Modified asphalt composition |
| CN107446364A (en) * | 2017-04-01 | 2017-12-08 | 江苏中路工程技术研究院有限公司 | A kind of rubber asphalt and preparation method thereof |
| CN108165032A (en) * | 2017-11-30 | 2018-06-15 | 青海弘川新源实业股份有限公司 | A kind of modified asphalt working-up device and its application method |
| CN113801489A (en) * | 2021-10-19 | 2021-12-17 | 广州高速运营管理有限公司 | Rubber powder modified asphalt for pavement repair and preparation method thereof |
| CN113801489B (en) * | 2021-10-19 | 2023-05-23 | 广州高速运营管理有限公司 | Rubber powder modified asphalt for pavement repair and preparation method thereof |
| CN115306044A (en) * | 2022-10-12 | 2022-11-08 | 衡水中裕铁信防水技术有限公司 | Modified asphalt waterproof coiled material and preparation method 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 |
| CN117534371A (en) * | 2023-12-29 | 2024-02-09 | 知行良知实业股份有限公司 | High-proportion regenerated rubber asphalt mixture and preparation method thereof |
| CN117534371B (en) * | 2023-12-29 | 2024-04-02 | 知行良知实业股份有限公司 | High-proportion regenerated rubber asphalt mixture and preparation method thereof |
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Effective date of registration: 20170220 Address after: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Patentee after: China National Offshore Oil Corporation Patentee after: China National Offshore Oil Corporation Patentee after: CNOOC Refining & Chemical Research Institute (Beijing) Co., Ltd. Address before: 100010 Beijing, Chaoyangmen, North Street, room 25, No. 1414, room Patentee before: China National Offshore Oil Corporation Patentee before: China National Offshore Oil and Gas Development and Utilization Co., Ltd. |
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Address after: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee after: China National Offshore Oil Corporation Patentee after: China Offshore Oil Group Co., Ltd. Co-patentee after: CNOOC Refining & Chemical Research Institute (Beijing) Co., Ltd. Address before: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee before: China National Offshore Oil Corporation Patentee before: China National Offshore Oil Corporation Co-patentee before: CNOOC Refining & Chemical Research Institute (Beijing) Co., Ltd. |