CN103289105B - A kind of preparation method of emulsified rubber asphalt - Google Patents
A kind of preparation method of emulsified rubber asphalt Download PDFInfo
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- CN103289105B CN103289105B CN201310170629.6A CN201310170629A CN103289105B CN 103289105 B CN103289105 B CN 103289105B CN 201310170629 A CN201310170629 A CN 201310170629A CN 103289105 B CN103289105 B CN 103289105B
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Abstract
The invention discloses a kind of preparation method of emulsified rubber asphalt, comprise the steps: to adopt outer mode of mixing to add rubber powder in matrix pitch, after shearing 40 ~ 60min with boxshear apparatus, namely obtain rubber asphalt; Above-mentioned rubber asphalt is mixed with emulsifier aqueous solution, mixed material is placed in boxshear apparatus and stirs, can emulsified rubber asphalt be obtained.The present invention has that preparation technology is simple, easy handling, with low cost, the advantage such as take a short time, and preparation method of the present invention improves the performance of emulsified rubber asphalt, obtained emulsified rubber asphalt may be used for maintenance of surface, maintenance, making asphalt and makes the purposes such as matrix material.
Description
Technical field
The present invention relates to a kind of preparation method of modifying asphalt, especially relate to a kind of preparation method of emulsified rubber asphalt.
Background technology
Emulsified bitumen is by common matrix pitch, through adding emulsifying agent and churned mechanically method, being diffused in water, utilizing the amphiphile, amphiphilic molecule of hydrophilic one end, emulsifying agent one end oleophylic, generates oil-in-water or water in oil flowing shape pitch.Emulsified bitumen has the advantages such as the few and easy construction of save energy, environmental pollution, is usually used in construction waterproofing engineering and Road construction.In Road construction, be mainly used in the maintenance of old pavement, maintenance and slurry seal, tack coat etc.Compared with common hot asphalt, emulsified bitumen provides a kind of construction process of safer, energy saving standard.In recent years, along with people are to the raising day by day of environmental protection requirement, emulsified bitumen obtains to be applied widely.But due to the thermolability of emulsified bitumen, its application is subject to certain restrictions.In maintenance of surface, maintenance, increasing organisations and institutions tend to use the bituminous material of more high-quality to punish crack, and give up pitch or the emulsified bitumen of non-modified.The pitch of high-quality not only may be used for crack sealing but also may be used for crack filling.
In order to improve the performance of pitch each side, in engineering, usually adding properties-correcting agent make modifying asphalt.Most popular is SBS modifying asphalt, and have the modifying asphalt of about 40% all to adopt SBS modification at present in the world, compare with plain asphalt, its high temperature, low-temperature performance are all greatly improved.But SBS modifying asphalt price costly limits it to a certain extent and uses and promote.And the modifying asphalt made using rubber powder as properties-correcting agent, not only can improve the high temperature performance of pitch, anti-fatigue performance, cling property and reduction pavement noise, and the black pollution of junked tire can be reduced to a great extent, there are triple advantages of performance, price and environmental protection.According to the developing direction of current China in the urgent need to environmental protection, saving type material, promote rubber powder and asphalt and there is broad prospect of application.
Emulsified bitumen and rubber asphalt all have the advantage that plain asphalt does not possess, and by simple and easy, feasible method, the pavement performance that emulsified rubber powder pitch had both improve material are prepared in both fusions, additionally reduce waste old and pollute thus reduce material construction.It is a kind of type material that can be applied to road maintenance, maintenance and prepare bituminous concrete and various matrix material.A kind of preparation method of waste rubber modified emulsifying asphalt is disclosed in patent CN102660125A, the method prepares fluid rubbers first at high temperature under high pressure, then carry out mixing obtained Crumber rubber modified asphalt with fluid rubbers by after matrix pitch heating, finally the rubber asphalt prepared is mixed with the emulsifier solution prepared in advance and high speed shear.In this method, fluid rubbers preparation technology is more complicated, the desulfurization that the long high speed shear time may cause rubber grain excessive and degraded, and when rubber asphalt and emulsifier solution mixing, too high velocity of shear may cause breakdown of emulsion.
Summary of the invention
Technical problem to be solved by this invention is to provide that a kind of technique is simple, the preparation method of easy handling, emulsified rubber asphalt with low cost.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is:
A preparation method for emulsified rubber asphalt, adopts outer mode of mixing to add rubber powder in matrix pitch, shears 40 ~ 60min, obtain rubber asphalt with boxshear apparatus; Above-mentioned rubber asphalt is mixed with emulsifier aqueous solution, mixed material is placed in boxshear apparatus and stirs, can emulsified rubber asphalt be obtained.
Wherein, the bi tumenf orr oad that described matrix pitch requires for meeting GB/T15180-2010 " heavy traffic paving asphalt ", 30 orders that described rubber powder adopts normal temperature grinding to produce or 40 order using rubber powder of waste tire.
Wherein, the add-on of described rubber powder is 25% ~ 30% of matrix pitch quality.
Wherein, the velocity of shear of described boxshear apparatus is 1000 ~ 1100r/min.
Wherein, described emulsifier aqueous solution be by be the emulsifying agent of 1 ~ 3% by mass percent, the thickening material of 0 ~ 1% and 0 ~ 1% auxiliary agent add in deionized water, reheat to 50 ~ 60 DEG C of emulsifier aqueous solutions obtained after fully stirring.
Wherein, the profit mass ratio of described rubber asphalt and emulsifier aqueous solution is 50: 50 or 60: 40.
Wherein, the temperature of described matrix pitch is 180 DEG C ~ 200 DEG C, and the temperature of described rubber asphalt is 120 ~ 130 DEG C.
Wherein, the time that described boxshear apparatus stirs is 3 ~ 5min, the rotating speed of described boxshear apparatus is 400 ~ 500r/min, and boxshear apparatus keeps lower rotating speed can ensure the storage stability of emulsified rubber asphalt, and the too high rotating speed of boxshear apparatus easily causes emulsified rubber asphalt stability to reduce even breakdown of emulsion.
Wherein, described emulsifying agent to be alkyl polyoxyethylene base bi-quaternary ammonium salt with palmityl trimethyl ammonium chloride or cetyl trimethylammonium bromide be in mass ratio 1: 1 mix, or, for alkyl polyoxyethylene base bi-quaternary ammonium salt and palmityl trimethyl ammonium chloride or cetyl trimethylammonium bromide with in alkylphenol polyoxyethylene be 1: 1: 0.25 mix in mass ratio, several different emulsifying agent can alternating sorbent on the surface of pitch particle, and there is good compatibleness, can relax between same emulsifier molecules due to tension force that electrostatic repulsion brings, compared with single emulsifying agent, compound emulsifying agent can improve the stability of emulsifier solution, thickening material is Natvosol, can improve the viscosity of aqueous phase, reduces the density variation between water and oil, increases the thickness of the hydration layer wrapped up outside pitch, improves emulsion intercalation method, auxiliary agent is any one in ammonium chloride, polyvinyl alcohol, calcium chloride or hydrochloric acid, consumption adjusts according to the pH value of the aqueous solution, ensures that consumption is no more than 1%, and auxiliary agent is used for regulating the pH value of emulsifier aqueous solution, improve emulsifying capacity, the raising emulsion intercalation method of emulsifying agent with this, and reduce costs.
Wherein, the pH value of described emulsifier aqueous solution is 5 ~ 6.
The pH value of temperature, emulsifying agent volume, emulsifier aqueous solution all has considerable influence to emulsified bitumen effect, wherein pH value the having the greatest impact to emulsifying effectiveness of emulsifier aqueous solution.When pH value is incorrect, only with the concentration of emulsifying agent, the adjustment of temperature, can not reach and make pitch well be dispersed in object in emulsifying agent, stability can not meet the demands; And when reaching suitable pH value, even if reduce the concentration of emulsifying agent, pitch still can disperse by emulsifying agent.When the pH value of emulsifier aqueous solution is 5 ~ 6, emulsifier aqueous solution is brown, and foam is few, and emulsification is complete, and surface skining phenomenon is compared with slight during other pH value, and the breakdown of emulsion time is long.
Beneficial effect: compared to prior art, the present invention has that preparation technology is simple, easy handling, with low cost, the advantage such as take a short time, and preparation method of the present invention improves the performance of emulsified bitumen, obtained emulsified rubber asphalt may be used for maintenance of surface, maintenance, making asphalt and makes the purposes such as matrix material.
Embodiment:
According to following embodiment, the present invention may be better understood.But those skilled in the art will readily understand, the content described by embodiment only for illustration of the present invention, and should can not limit the present invention described in detail in claims yet.
Embodiment 1
A kind of preparation method of emulsified rubber asphalt, the add-on of following material is all for standard with the quality of pitch, No. 90 A level road bitumens meeting code requirement are heated to 185 DEG C, the 27.5%(volume mixing asphalt quality outward ensures that viscosity index reaches requirement) 30 order waste tire rubber powders, high-speed shearing machine is adopted to carry out shearing 60min, obtain rubber asphalt, velocity of shear is 1000r/min, and rubber asphalt is cooled to 130 DEG C in atmosphere;
By the alkyl polyoxyethylene base bi-quaternary ammonium salt of 1.0% of asphalt quality, the palmityl trimethyl ammonium chloride of 1.0%, the alkylphenol polyoxyethylene of 0.25% and 0.6% Natvosol, add in deionized water, abundant stirring is also heated to 50 DEG C, in solution, add 1% ammonium chloride again to regulate the pH value of emulsifier aqueous solution, make the pH value of emulsifier aqueous solution be 5;
To be cooled to the rubber asphalt of 120 DEG C in normal temperature, be that 60:40 mixes with emulsifier aqueous solution by profit mass ratio, mixed material is placed in boxshear apparatus and stirs 3min, rotating speed is 400r/min, and can obtain solid content is 60% emulsified rubber asphalt.
Embodiment 2
A kind of preparation method of emulsified rubber asphalt, the add-on of following material is all for standard with the quality of pitch, No. 70 A level bi tumenf orr oads of code requirement will be met, its technical feature is as follows: penetration degree (25 DEG C, be 0.1mm) 70.8, softening temperature (DEG C) is 49.6, ductility (10 DEG C, cm) be 23.7, be heated to 180 DEG C, the normal temperature mixing 25% of asphalt quality outward grinds 40 order using rubber powder of waste tire, high-speed shearing machine is adopted to carry out shearing 40min, obtain rubber asphalt, velocity of shear is 1100r/min, rubber asphalt is grown 1h at 175 DEG C, be cooled to 130 DEG C in atmosphere,
Get the alkyl polyoxyethylene base bi-quaternary ammonium salt of 1.5% of asphalt quality, the cetyl trimethylammonium bromide of 1.5% and the Natvosol of 0.2%, add in deionized water, abundant stirring is also heated to 60 DEG C, add the pH value that 0.5% polyvinyl alcohol regulates emulsifier aqueous solution again, make the pH value of emulsifier aqueous solution be 6;
To be cooled to the rubber asphalt of 130 DEG C, be with emulsifier aqueous solution to mix at 50: 50 by profit mass ratio, mixed material is placed in boxshear apparatus and stirs 5min, rotating speed is 450r/min, and can obtain solid content is 55% emulsified rubber asphalt.
Embodiment 3
A kind of preparation method of emulsified rubber asphalt, the add-on of following material is all for standard with the quality of pitch, No. 90 A level road bitumens meeting code requirement are heated to 200 DEG C, the normal temperature mixing 30% of asphalt quality outward grinds 30 order waste tire rubber powders, high-speed shearing machine is adopted to carry out shearing 50min, obtain rubber asphalt, velocity of shear is 1050r/min, and rubber asphalt is cooled to 125 DEG C in atmosphere;
Getting the alkyl polyoxyethylene base bi-quaternary ammonium salt of 1.2% of asphalt quality, the cetyl trimethylammonium bromide of 1.2% and the alkylphenol polyoxyethylene of 0.3% adds in deionized water, abundant stirring is also heated to 55 DEG C, in solution, add 0.1% calcium chloride again to regulate the pH value of emulsifier aqueous solution, make the pH value of emulsifier aqueous solution be 5.5;
To be cooled to the rubber asphalt of 125 DEG C in normal temperature, be that 50:50 mixes with emulsifier aqueous solution by profit mass ratio, mixed material is placed in boxshear apparatus and stirs 4min, rotating speed is 500r/min, and can obtain solid content is 50% emulsified rubber asphalt.
Embodiment 4
A kind of preparation method of emulsified rubber asphalt, the add-on of following material is all for standard with the quality of pitch, No. 90 A level road bitumens meeting code requirement are heated to 190 DEG C, the normal temperature mixing 40% of asphalt quality outward grinds 40 order waste tire rubber powders, high-speed shearing machine is adopted to carry out shearing 50min, obtain rubber asphalt, velocity of shear is 1100r/min, and rubber asphalt is cooled to 120 DEG C in atmosphere;
Get the alkyl polyoxyethylene base bi-quaternary ammonium salt of 0.5% of asphalt quality, the palmityl trimethyl ammonium chloride of 0.5% and the Natvosol of 1.0%, add in deionized water, abundant stirring is also heated to 50 DEG C, in solution, add 0.8% hydrochloric acid again to regulate the pH value of emulsifier aqueous solution, make the pH value of emulsifier aqueous solution be 6;
To be cooled to the rubber asphalt of 120 DEG C in normal temperature, be that 60:40 mixes with emulsifier aqueous solution by profit mass ratio, mixed material is placed in boxshear apparatus and stirs 5min, rotating speed is 400r/min, and can obtain solid content is 60% emulsified rubber asphalt.
Claims (6)
1. a preparation method for emulsified rubber asphalt, is characterized in that: adopt outer mode of mixing to add rubber powder in matrix pitch, shear 40 ~ 60min, obtain rubber asphalt with boxshear apparatus, above-mentioned rubber asphalt is mixed with emulsifier aqueous solution, mixed material is placed in boxshear apparatus and stirs, can emulsified rubber asphalt be obtained, wherein, described emulsifier aqueous solution is by being the emulsifying agent of 1% ~ 3% by mass percent, the thickening material of 0 ~ 1% and the auxiliary agent of 0 ~ 1% add in deionized water, to reheat after abundant stirring to 50 ~ 60 DEG C and obtain, the time that described boxshear apparatus stirs is 3 ~ 5min, the rotating speed of described boxshear apparatus is 400 ~ 500r/min, described emulsifying agent is alkyl polyoxyethylene base bi-quaternary ammonium salt is mixing of 1:1 with palmityl trimethyl ammonium chloride or cetyl trimethylammonium bromide in mass ratio, or, for alkyl polyoxyethylene base bi-quaternary ammonium salt and palmityl trimethyl ammonium chloride or cetyl trimethylammonium bromide and mixing in mass ratio for 1:1:0.25 in alkylphenol polyoxyethylene, thickening material is Natvosol, auxiliary agent is ammonium chloride, polyvinyl alcohol, any one in calcium chloride or hydrochloric acid, the pH value of described emulsifier aqueous solution is 5 ~ 6.
2. the preparation method of emulsified rubber asphalt according to claim 1, is characterized in that: the particle diameter of described rubber powder is 30 orders or 40 orders.
3. the preparation method of emulsified rubber asphalt according to claim 1, is characterized in that: the add-on of described rubber powder is 25% ~ 30% of matrix pitch quality.
4. the preparation method of emulsified rubber asphalt according to claim 1, is characterized in that: the velocity of shear of described boxshear apparatus is 1000 ~ 1100r/min.
5. the preparation method of emulsified rubber asphalt according to claim 1, is characterized in that: the profit mass ratio of described rubber asphalt and emulsifier aqueous solution is 50: 50 or 60: 40.
6. the preparation method of emulsified rubber asphalt according to claim 1, is characterized in that: the temperature of described matrix pitch is 180 DEG C ~ 200 DEG C, and the temperature of described rubber asphalt is 120 ~ 130 DEG C.
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| CN103911009B (en) * | 2014-04-02 | 2016-04-13 | 上海群康沥青科技有限公司 | Emulsified rubber powder-modified asphalt and preparation method thereof |
| CN106009729A (en) * | 2016-06-28 | 2016-10-12 | 郭迎庆 | Preparing method of modified emulsified asphalt |
| CN106496595A (en) * | 2016-10-13 | 2017-03-15 | 常州市鼎升环保科技有限公司 | A kind of preparation method of composite asphalt emulsifying agent |
| JP6993778B2 (en) | 2016-12-21 | 2022-01-14 | Ｔｏｙｏ Ｔｉｒｅ株式会社 | Rubber composition |
| CN109266027A (en) * | 2018-09-17 | 2019-01-25 | 浙江潮源新型建材股份有限公司 | Reclaimed rubber modified pitch |
| CN118240288A (en) * | 2024-03-11 | 2024-06-25 | 福建科顺新材料有限公司 | Modified rubber powder and preparation method thereof, composition for non-cured waterproof coating, high-viscosity non-cured waterproof coating and preparation method thereof |
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| US5928418A (en) * | 1995-12-04 | 1999-07-27 | Kao Corporation | Asphalt emulsion |
| CN1664012A (en) * | 2005-02-04 | 2005-09-07 | 杨林江 | Emulsified SBS modified asphalt and processing method thereof |
| CN101205382A (en) * | 2006-12-21 | 2008-06-25 | 上海群康沥青科技有限公司 | Rubber asphalt composition |
| CN101173106B (en) * | 2007-09-30 | 2010-11-17 | 江苏博特新材料有限公司 | Rubber powder-asphalt emulsion for concrete asphalt mortar and method for producing the same |
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