CN101817946A - Activated waste rubber powder and preparation method thereof as well as modified asphalt and preparation method thereof - Google Patents
Activated waste rubber powder and preparation method thereof as well as modified asphalt and preparation method thereof Download PDFInfo
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Abstract
The invention relates to activated waste rubber powder and a preparation method thereof. The activated waste rubber powder is prepared from a mixture containing waste rubber powder, a softener and/or a rubber activating agent. The invention also relates to a waste rubber powder modified asphalt and a preparation method thereof. The waste rubber powder modified asphalt is prepared from a mixture containing base asphalt and the activated waste rubber powder. The activated waste rubber powder and the base asphalt have favorable compatibility, and the modified asphalt containing the activated waste rubber powder can have favorable storage stability, high temperature property and ageing-resistant performance and lower cost. In addition, the preparation methods of the activated waste rubber powder and the modified asphalt are simple in process and convenient to operate.
Description
Technical field
The present invention relates to a kind of activated waste rubber powder, also relate to the preparation method of this activated waste rubber powder, also relate to modifying asphalt that contains this activated waste rubber powder and preparation method thereof.
Background technology
In recent years, high speed development of national economy has driven greatly developing of Chinese highway communication carrier and improving constantly of the average load-carrying of road vehicle.In order to satisfy the demand of market economy to carrier, the expressway construction mileage is all maintaining sustained and rapid growth every year.Enter nearly 10 years of new millennium, strategy to develop western regions has proposed more urgent requirement to the road industry, is badly in need of wanting adapting to the high-performance ground surface material of western high and cold, high day and night temperature.
But common bituminous pavement is big to the susceptibility of temperature, and easily embrittlement is at low temperatures at high temperature easily flowed, and loss of properties on aging, also is easy to damage.Therefore, must carry out modification, improving the performance of bituminous pavement, and be adapted to the demand of Modern Traffic pitch.
Adopting properties-correcting agent that pitch is carried out the use properties that modification and pavement structure reasonable in design improve bituminous pavement, prolong the work-ing life on road surface, is the key subjects that present highway in China is built.To requirement be by the bituminous concrete pavement of good modifying asphalt making, can accomplish " do not ftracture winter, and summer is indeformable ", promptly when high temperature, can resist rut, can cracking resistance during low temperature, and can satisfy the different demands of heavy traffic flow, high-grade highway and Urban traffic.
Domestic and international researchist uses multiple polymers pitch has been carried out modification.With respect to plain asphalt, polymer modified asphalt can improve the use properties of bituminous pavement greatly, reduces the bituminous temperature sensitivity, improves elasticity, toughness, viscosity, ageing-resistant, weathering resistance, and can strengthen bonding strength with building stones.
Research being most widely used in road bitumen of SBS (styrene-butadiene-styrene block copolymer) modifying asphalt, full-fledged.But along with the exhaustion day by day of petroleum resources, the price of SBS is more and more higher, causes the cost of SBS modifying asphalt also more and more higher.
Meanwhile, the white pollution that the black pollution that waste tire of automobile caused, waste or used plastics cause has become modern society's urgent problem.Waste and scrap such as waste old and waste or used plastics and pitch belong to macromolecular material, and performance has its similarity to a certain extent, thereby with spent high molecular material pitch to be carried out modification be present important research direction.From the every pavement performance that uses, the over-all properties of spent high molecular material modifying asphalt is more excellent, and can make full use of waste and scrap, and decontamination is increased economic efficiency, and is the new technology of energy-conserving and environment-protective.
Start from Britain in 19 worlds about the research of rubber modified asphalt, the U.S. has carried out dry process as far back as the forties in 20th century and has produced rubber powder and asphalt mixture Ramlqex.China also begins the application of rubber modifying asphalt in the eighties in 20th century.A large amount of experimental studies show, rubber is because advantages such as its snappiness are carried out the performance that modification not only has common polymer modified asphalt with it to pitch, but also can noise reduction, increase bullet, price is relatively cheap.In recent years, for environment protection, factors such as cost reduction and high performance, the waste old powder-modified asphalt more and more comes into one's own.
Recognize economy, the environmental protection of waste Crumb rubber modified asphalt people, when can improve advantage such as bituminous high temperature performance, instability when finding waste old powder-modified asphalt high-temperature storage, waste rubber powder is easy to produce precipitation, segregation, construction quality is difficult to control, has limited its application.Along with the expansion to the waste Crumb rubber modified asphalt demand, and the scene that is subjected to mixes and stirs the influence of production efficiency, production cost, execution conditions, and the waste Crumb rubber modified asphalt high-temperature stability has been subjected to investigators' attention.
In the prior art, the preparation of waste Crumb rubber modified asphalt generally mixed stirring several hours with rubber powder and makes with pitch under comparatively high temps.Yet, because waste Crumb rubber is a kind of through sulfurized rubber, when sulfuration, formed three-dimensional net structure, therefore swelling on a small quantity in pitch by chemical bond.Rubber powder is similar to elastic filler and is present in the pitch, and is poor with the bituminous consistency, limited to the modified effect of bituminous high temperature performance.In storage and use, poor stability, rubber powder and pitch is laminated segregation very easily.
Waste Crumb rubber and bituminous interaction mechanism more complicated, investigators have also adopted several different methods to improve the consistency of the two when exploring its mechanism.The main method of taking is that the less waste Crumb rubber of application granularity adopts colloidal mill that rubber powder is fully disperseed; Rubber powder is carried out surface treatment; Adopt certain material to make the rubber powder degraded.The dispersiveness of multiple solution waste Crumb rubber in pitch and the method for consistency are disclosed both at home and abroad in recent years: the degraded activation of (1) waste Crumb rubber, (2) surface chemical modification of waste Crumb rubber, (3) add other polymkeric substance or preparation high density masterbatch, specific as follows described:
1, desulfurization.Desulfurization is a rubber powder under heat, oxygen and high shear, makes the cross-link bond of cross-linked rubber destroyed by the autoxidation reaction.The desulfurization rubber powder is because the partial cross-linked key in the rubber is interrupted, and the tridimensional network of rubber powder is destroyed, has certain dissolving swelling property.CN1441005A discloses a kind of desulfurization glue powder-modified asphalt, and it is made up of pitch, desulfurization rubber powder and compatilizer, compatilizer such as glytidyl methacrylate, epoxidation polybutene, glycidyl methacrylate, maleic acid etc.Its desulfurization rubber powder adopts high speed rotating heating method or dynamic desulfurization that rubber powder is carried out desulfurization and obtains.The desulfurization glue powder-modified asphalt can improve dissolving and the swelling of rubber powder in pitch, help to form submicroscopic homogeneous system, bituminous high temperature performance and elasticity have been improved, simultaneously, desulfurization has produced more active group at vulcanized rubber powder, help producing chemical action, improved storage stability with the polar group in the pitch.But in the patent and not mentioned rubber powder be desulfurization how, and the technology of desulfurization.And its performance is not an optimum, and it is 6.5 that 48h stores back levels softening temperature difference.Desulfurization rubber powder and bituminous consistency in this desulfurization glue powder-modified asphalt are still lower, nor are suitable for suitability for industrialized production, also need to add some compatilizers, and production cost is higher.
2, high temperature degradation.US6387965 discloses a kind of under higher temperatures 150-300 ℃, adds organic solvent or aromatic hydrocarbon oil and stirs the method that makes the rubber powder degraded.
3, oxidative degradation.US5704971 and US5851276 disclose a kind of modifying asphalt that is used for highway and preparation method thereof.This method mixes superoxide with the oxygenated rubber powder with rubber powder, the rubber powder after the oxidation is joined in the pitch that contains a small amount of compatilizer, and rubber powder is mixed more equably with pitch, makes system more stable.But complex process, and only superoxide itself can not make the rubber powder surface produce active group, needs to add compatilizer.
4, microwave radiation.CN1597782A discloses a kind of with the method for microwave radiation shoddy with asphalt modification.Shoddy of crossing with the microwave radiation of 4-8% and the softening agent of 0-4% and the powder styrene butadiene rubber high speed shear of 2-4% prepare modifying asphalt.
5, surface active.CN101143968A discloses a kind of waste rubber powder modified asphalt and preparation thereof, this modifying asphalt is to adopt one or more fluid additives that rubber powder is carried out surperficial spray treatment, the waste Crumb rubber that to handle joins in the matrix pitch then, under 160-220 ℃ temperature, carry out high-shear or colloidal mill device processes, add polymkeric substance subsequently and linking agent prepares.This bituminous composition can improve stability in storage, but the auxiliary agent that contains is a lot, and cost is higher, and technology is loaded down with trivial details.
6, high density rubber powder masterbatch.WO9414896, WO9728220 disclose high-load rubber powder have been joined in the pitch, and process high speed shear and high temperature prepare the modifying asphalt of high density, the rubber powder modified asphalt of the stable storing that can obtain degrading.But this method rubber powder add-on is big, and rubber powder has the part degraded, is not suitable for in-situ processing and uses.
7, polymer composite modified with other.CN1528823A discloses a kind of employing two step process legal system and has been equipped with rubber powder modified asphalt masterbatch and rubber powder/polymer composite modified asphalt, at first under the condition of 140-250 ℃ and high speed shear, preparation high density rubber powder modified asphalt masterbatch, then under the condition of 140-230 ℃ and high speed shear, masterbatch is diluted to desired concn with pitch, and adds polymkeric substance and linking agent prepares rubber powder/polymer composite modified asphalt.CN101550276 discloses a kind of modifying asphalt system that adds shoddy, polystyrene particle, efficient activator, stablizer.CN101205399A discloses a kind of composite modified rubber asphalt of high-temperature stable, it contains pitch, rubber powder, SIS (styrene isoprene styrene block copolymer (SIS)), petroleum resin and Poly Propylene Wax, and the high-temperature stability of this modifying asphalt and workability are all better.CN1313566C discloses a kind of waste Crumb rubber modified asphalt and preparation method thereof, wherein is with SBS/SBR and shoddy, the stablizer composite modified asphalt.But need adding extra stablizer, above method just can obtain stable modifying asphalt system.
8, add some chemical assistants.CN1896143A, CN100340610C, CN101538409A etc. disclose several thinners that add in the waste Crumb rubber modified asphalt system, coupling agent, materials such as properties-correcting agent, and be aided with certain processing technique and obtain high-temperature stable, the waste Crumb rubber modified asphalt of excellent property.
Though above method has solved waste Crumb rubber and bituminous comixing compatibility, dispersion problem, often also has some problems, as complex process, operational difficulty, industrial production is consuming time many, and cost is high.
Summary of the invention
The objective of the invention is to overcome above-mentioned problems of the prior art, a kind of effective consistency of improving between waste Crumb rubber and the matrix pitch is provided, and have activated waste rubber powder of good storage stability and high-temperature behavior and preparation method thereof, and provide a kind of modifying asphalt that contains this activated waste rubber powder and preparation method thereof.
The technical scheme that the present invention takes is:
The invention provides a kind of activated waste rubber powder, it is made by the mixture that contains waste Crumb rubber, tenderizer and/or rubber activator.
The present invention also provides a kind of preparation method of activated waste rubber powder, and wherein, this method comprises: the mixture that will contain waste Crumb rubber, tenderizer and/or rubber activator carries out mixing.
The present invention also provides a kind of waste Crumb rubber modified asphalt, and it is made by the mixture that contains matrix pitch and activated waste rubber powder, and described activated waste rubber powder is an activated waste rubber powder provided by the invention.
The present invention also provides a kind of modified asphalt preparation method, comprise matrix pitch is heated to 100-220 ℃, add activated waste rubber powder, and at 4000-7000 rev/min velocity of shear down cut 30-90min, the weight ratio of described matrix pitch and described activated waste rubber powder is 75-92: 8-25, and described activated waste rubber powder is an activated waste rubber powder provided by the invention.
Have good consistency between activated waste rubber powder of the present invention and the matrix pitch, and can make the modifying asphalt that contains this activated waste rubber powder have good preservation stability, and have good high-temperature performance and ageing-resistant performance, cost is lower.And activated waste rubber powder of the present invention and modified asphalt preparation method technology are simple, easy to operate.
Embodiment
Below in detail the present invention will be described in detail.
Activated waste rubber powder provided by the invention is made by the mixture that contains waste Crumb rubber, tenderizer and/or rubber activator.Based on the waste Crumb rubber of 100 weight parts, the content of described tenderizer is the 0-10 weight part, and the content of described rubber activator is the 0-10 weight part, and described tenderizer and rubber activator and be that 1 weight part is above and below 20 weight parts.The content of preferred described tenderizer is the 1-10 weight part, and the content of described rubber activator is the 1-10 weight part.
In the preferred case, activated waste rubber powder of the present invention is made by the mixture that contains waste Crumb rubber, tenderizer and rubber activator, and the content of preferred described tenderizer is the 2-8 weight part, and the content of described rubber activator is the 2-8 weight part.
In the activated waste rubber powder of the present invention, " waste Crumb rubber " is also referred to as " shoddy " or " rubber powder ", but the use of mutual alternative in this manual.Usually prepare by waste old, thereby can reach utilization of waste material, energy-conserving and environment-protective purpose.Waste Crumb rubber can be commercially available, and also the waste and old air filled tyre of vehicles such as waste old such as car, motorbus, agricultural vehicle, truck can be prepared by ordinary methods such as normal temperature method well known by persons skilled in the art, normal temperature wet method, normal temperature auxiliary agent method or low-temperature freezings.The particle diameter of preferred waste Crumb rubber is 40-200 order, more preferably 40-120 order.Commercially available shoddy all can be used for the present invention.
In the activated waste rubber powder of the present invention, described tenderizer can be tenderizer commonly used in the rubber industry, for example petroleum-type tenderizer, coal tar oil-softener and plant oil tenderizer etc.Preferred especially petroleum-type tenderizer and coal tar oil-softener among the present invention; The petroleum-type tenderizer is heavy oil, whiteruss, naphthenic oil, Yatall MA and white oil etc. for example; The coal tar oil-softener mainly is coal tar and coal-tar pitch etc.Tenderizer plays swelling action to rubber, makes network structure lax, increases the osmosis of oxygen, thereby accelerates the reactivation process of shoddy.
In the activated waste rubber powder of the present invention, described rubber activator mainly plays the effect of shoddy activatory, the vulcanized network of shoddy is opened, generally can at high temperature produce free radical, this free radical can combine with the free radical in the shoddy, and can stop the post-rift repolymerization of rubber molecule, accelerate the activating velocity of shoddy.This rubber activator preferably contains 2-benzothiazolyl mercaptan, dibenzothiazyl disulfide, ziram and 2, at least a among the two 6-tertiary butyl Pyrogentisinic Acids of 2-curing.Concrete rubber activator such as thiazoles thiofide (comprising 2-benzothiazolyl mercaptan (captax), dibenzothiazyl disulfide or its mixture); Promotor ZDMC (ziram); Activator De-link (containing ziram and 2-benzothiazolyl mercaptan) and activator 420 (2, the two 6-tertiary butyl Pyrogentisinic Acids of 2-curing).Above-mentioned rubber activator all can pass through commercially available, and all applicable to the present invention.
The preparation method of activated waste rubber powder of the present invention comprises: the mixture that will contain waste Crumb rubber, tenderizer and/or rubber activator under 50-100 ℃ temperature mixing 10-20 minute obtains activated waste rubber powder.Described mixing can carrying out in the rubber rubber mixing machine, this rubber rubber mixing machine can variously can be used for mixing equipment for well known by persons skilled in the art, for example can be open, closed, perhaps can be the rubber mixing machine of screw.
Waste Crumb rubber modified asphalt of the present invention is made by the mixture that contains matrix pitch and activated waste rubber powder, and this activated waste rubber powder is an activated waste rubber powder provided by the invention.And the content of described matrix pitch is 75-92 weight %, and the content of described activated waste rubber powder is 8-25 weight %.
In the waste Crumb rubber modified asphalt of the present invention, described matrix pitch is a petroleum pitch, grade be in " asphalt highway construction technique normalizing " defined in, light and heavy-duty road asphalt all is fit to the present invention.
The preparation method of waste Crumb rubber modified asphalt of the present invention adds activated waste rubber powder provided by the invention for matrix pitch is heated to 100-220 ℃, and at 4000-7000 rev/min velocity of shear down cut 30-90min and get.
Activated waste rubber powder provided by the invention has improved the consistency of waste Crumb rubber and matrix pitch effectively, and improved the storage stability of modifying asphalt, show that segregation experimentally descends poor≤2.5 ℃ of softening temperature, high-temperature behavior improves simultaneously, and softening temperature is significantly improved.
Main theory basis of the present invention is that waste Crumb rubber mainly is swelling and Degradation in pitch.By the strong shearing of rubber rubber mixing machine and the physics chemical action of rubber activator and tenderizer, oxidation, desulfurization, degraded have taken place in the netted macromolecular structure of waste Crumb rubber, have become reticulated structure and a spot of linear chain-like structure of great quantity of small.Promptly the waste Crumb rubber after the activation has been removed the S-S key, and has produced the certain activity free radical under the effect of shearing force.The tenderizer that adds makes the further swelling of waste Crumb rubber, makes the waste Crumb rubber that adds in the pitch can absorb the interior lightweight oil content of pitch soon and swelling.In addition, waste Crumb rubber presents tiny microgranular distribution in pitch, most waste Crumb rubber particle links to each other by gel-film, form a semi-solid state external phase system that viscosity is very big, make after the swelling activated waste rubber powder more equably suspended dispersed in pitch, solved waste Crumb rubber combine with the bituminous interface bad, the problem of phase poor stability.Therefore, the stability in storage of resulting modifying asphalt and high-temperature behavior are all fine, and other performance also is significantly improved.
Below will embodiment of the present invention be described, but the present invention is not limited to these certain embodiments by embodiment.Wherein except that nonspecific indicating, the application's percentage composition and content ratio are all in mass.
Employed raw material among each embodiment:
Matrix pitch: the SK70# of Korea S SK company, 25 ℃ of penetration degrees are 70dmm, and softening temperature is 50.1 ℃, and 10 ℃ of ductilities are 22.1, and brookfield viscosity (135 ℃) is 0.3935;
Waste Crumb rubber, Science and Technology Ltd. is risen by the general foreign China in Beijing, and specification is 40 orders, 80 orders and 120 orders;
Naphthenic oil, coal tar, whiteruss, heavy oil, Yatall MA, white oil is the commercially available prod, available from Beijing Wei Si experimental article company.
De-link is available from sky Hua Dilian rubber plant.
Embodiment 1-9
1, preparation activated waste rubber powder
The activated waste rubber powder for preparing embodiment 1-12 by listed component of table 1 and consumption thereof, each composition is joined rubber mixing machine (rubber machinery plant, Shanghai, SK-1608) in, and in table 1, carry out mixingly under listed melting temperature and the mixing time, make activated waste rubber powder.
Table 1
| Waste Crumb rubber (mass parts) | Tenderizer (mass parts) | Rubber activator (mass parts) | Melting temperature (℃) | Mixing time (minute) | |
| Embodiment 1 | 100 parts in 80 orders | 3.5 parts of naphthenic oils | ??- | ??50 | ??20 |
| Embodiment 2 | 100 parts in 80 orders | ??- | 1 part of De-link | ??100 | ??10 |
| Embodiment 3 | 100 parts in 80 orders | 3.6 parts of naphthenic oils | 4 parts of De-link | ??80 | ??15 |
| Waste Crumb rubber (mass parts) | Tenderizer (mass parts) | Rubber activator (mass parts) | Melting temperature (℃) | Mixing time (minute) | |
| Embodiment 4 | 100 parts in 40 orders | 7 parts of naphthenic oils | 4.5 parts of De-link | ??80 | ??15 |
| Embodiment 5 | 100 parts in 40 orders | 7.18 parts in coal tar | ??- | ??80 | ??15 |
| Embodiment 6 | 100 parts in 40 orders | ??- | 9 parts of De-link | ??80 | ??15 |
| Embodiment 7 | 100 parts in 120 orders | 7 parts in coal tar | 4.5 parts of De-link | ??80 | ??15 |
| Embodiment 8 | 100 parts in 120 orders | 3.68 parts in coal tar | ??- | ??80 | ??15 |
| Embodiment 9 | 100 parts in 120 orders | 7.22 parts of whiterusss | ??- | ??80 | ??15 |
| Embodiment 10 | 100 parts in 80 orders | 1 part in heavy oil | ??80 | ??20 | |
| Embodiment 11 | 100 parts in 80 orders | 3 parts of Yatall MAs | ??70 | ??15 | |
| Embodiment 12 | 100 parts in 80 orders | 10 parts of white oils | ??70 | ??15 |
2, the preparation of modifying asphalt
Use the activated waste rubber powder for preparing among pitch and the embodiment 1-12 to prepare modifying asphalt respectively according to component listed in the table 2 and consumption.
Pitch as the matrix pitch heat fused, is added the above-mentioned activated waste rubber powder for preparing, shear with 4000-7000 rev/min velocity of shear under 180 ℃, the time of shearing also sees Table 2, finally obtains modified bitumen product 1-12.
Table 2
| The asphaltic products. numbering | Pitch (mass parts) | Activated waste rubber powder (mass parts) | The activated waste rubber powder source | Shear time (minute) |
| ??1 | ??92 | ??8 | Embodiment 1 | ??60 |
| ??2 | ??92 | ??8 | Embodiment 2 | ??60 |
| ??3 | ??92 | ??8 | Embodiment 3 | ??60 |
| ??4 | ??88 | ??12 | Embodiment 4 | ??60 |
| ??5 | ??88 | ??12 | Embodiment 5 | ??60 |
| ??6 | ??88 | ??12 | Embodiment 6 | ??40 |
| ??7 | ??88 | ??12 | Embodiment 7 | ??50 |
| ??8 | ??80 | ??20 | Embodiment 8 | ??50 |
| ??9 | ??85 | ??15 | Embodiment 9 | ??50 |
| ??10 | ??75 | ??25 | Embodiment 10 | ??90 |
| ??11 | ??85 | ??15 | Embodiment 11 | ??30 |
| ??12 | ??85 | ??15 | Embodiment 12 | ??40 |
Comparative Examples 1
100 parts of pitches as the matrix pitch heat fused, are added 15 part of 80 non-activated waste Crumb rubber of order, and the velocity of shear with 4000-7000 rev/min under 180 ℃ is sheared 50min, obtains modified bitumen product 13.
Comparative Examples 2
100 parts of pitches as the matrix pitch heat fused, are added 15 part of 80 non-activated waste Crumb rubber of order and 5 parts of naphthenic oils, and the velocity of shear with 4000-7000 rev/min under 180 ℃ is sheared 60min, obtains modified bitumen product 14.
Performance test
According to the Ministry of Communications's industry standard " highway engineering pitch and asphalt testing regulation (JTJ 052-2000) " (Beijing: People's Transportation Press, publish in August, 2000), the product 1-14 that material asphalt and the foregoing description 1-12 and Comparative Examples 1-2 are prepared carries out the test of softening temperature, ductility (5 ℃), 25 ℃ of penetration degrees, segregation experimental analysis and 135 ℃ of brookfield viscosities respectively.Test result sees Table 3.
Table 3
| Asphaltic products. | Softening temperature (℃) | 5 ℃ of ductilities (cm) | 25 ℃ of penetration degrees (dmm) | 48 hours the segregation softening temperature poor (℃) | 135 ℃ of brookfield viscosities (Pa.s) |
| ??1 | ??62.2 | ??8.2 | ??49 | ??1.1 | ??1.779 |
| ??2 | ??62.7 | ??8.5 | ??43 | ??2.3 | ??1.546 |
| ??3 | ??62.6 | ??8.6 | ??47 | ??1.3 | ??1.520 |
| ??4 | ??65.9 | ??9.1 | ??42 | ??2.2 | ??2.175 |
| ??5 | ??60.5 | ??8.3 | ??52 | ??0.2 | ??2.044 |
| ??6 | ??62.3 | ??8.5 | ??42 | ??0.7 | ??2.071 |
| ??7 | ??60.5 | ??8.6 | ??44 | ??0.4 | ??2.033 |
| ??8 | ??70 | ??12.5 | ??46 | ??1.6 | ??2.874 |
| ??9 | ??61.9 | ??10 | ??51 | ??2 | ??3.272 |
| ??10 | ??62.3 | ??12 | ??44 | ??2.3 | ??2.985 |
| ??11 | ??61.5 | ??9.8 | ??42 | ??2.4 | ??2.175 |
| ??12 | ??61 | ??10 | ??41 | ??1.8 | ??2.154 |
| ??13 | ??56 | ??9.7 | ??46 | ??9.5 | ??2.399 |
| ??14 | ??62 | ??7.3 | ??41 | ??5.4 | ??2.148 |
| Tianjin rubber powder pitch standard | ??≥55 | ??≥10 | ??40-60 | ??≤2.5 | ??—— |
| Beijing rubber asphalt technological standard | ??≥47 | ??≥10 | ??40-80 | ??—— | ??≤3 |
By above-mentioned test result as can be seen, the segregation softening temperature difference of the asphaltic products. 1-12 of embodiment 1-12 is all less than 2.5 ℃, and the segregation softening temperature of the asphaltic products. 13-14 of Comparative Examples 1-2 all is far longer than 2.5, therefore the modified bitumen product that contains activated waste rubber powder of the present invention can solve waste Crumb rubber and bituminous segregation problem effectively, therefore, activated waste rubber powder and bituminous consistency are good among the asphaltic products. 1-12 of embodiment of the invention 1-12, the stability in storage of modified bitumen product of the present invention is good thus, main performance index has reached related request, meet the highway material performance index, and has an environmental benefit, cost is lower, has good comprehensive use properties.
Claims (12)
1. an activated waste rubber powder is characterized in that, it is made by the mixture that contains waste Crumb rubber, tenderizer and/or rubber activator.
2. activated waste rubber powder according to claim 1, it is characterized in that, waste Crumb rubber based on 100 weight parts, the content of described tenderizer is the 0-10 weight part, the content of described rubber activator is the 0-10 weight part, and described tenderizer and rubber activator and be that 1 weight part is above and below 20 weight parts; The content of preferred described tenderizer is the 1-10 weight part, and the content of described rubber activator is the 1-10 weight part.
3. activated waste rubber powder according to claim 1 is characterized in that, it is made by the mixture that contains waste Crumb rubber, tenderizer and rubber activator; And based on the waste Crumb rubber of 100 weight parts, the content of described tenderizer is the 2-8 weight part, and the content of described rubber activator is the 2-8 weight part.
4. according to claim 1,2 or 3 described activated waste rubber powders, it is characterized in that the particle diameter of described waste Crumb rubber is the 40-200 order.
5. according to claim 1,2 or 3 described activated waste rubber powders, it is characterized in that described tenderizer is petroleum-type tenderizer and/or coal tar oil-softener.
6. activated waste rubber powder according to claim 5 is characterized in that, described petroleum-type tenderizer is at least a in naphthenic oil, Yatall MA, heavy oil, white oil and the whiteruss, and described coal tar oil-softener is at least a of coal tar and coal-tar pitch.
7. according to claim 1,2 or 3 described activated waste rubber powders, it is characterized in that, described rubber activator contains 2-benzothiazolyl mercaptan, dibenzothiazyl disulfide, ziram and 2, at least a among the two 6-tertiary butyl Pyrogentisinic Acids of 2-curing.
8. a method for preparing the described activated waste rubber powder of claim 1 is characterized in that, this method comprises: the mixture that will contain waste Crumb rubber, tenderizer and/or rubber activator carries out mixing.
9. method according to claim 8 is characterized in that, described mixing temperature is 50-100 ℃, and the described mixing time is 10-20 minute.
10. a waste Crumb rubber modified asphalt is characterized in that, this modifying asphalt is made by the mixture that contains matrix pitch and activated waste rubber powder, and described activated waste rubber powder is any described activated waste rubber powder among the claim 1-7.
11. waste Crumb rubber modified asphalt according to claim 10 is characterized in that, the content of described matrix pitch is 75-92 weight %, and the content of described activated waste rubber powder is 8-25 weight %.
12. modified asphalt preparation method, it is characterized in that, this method comprises matrix pitch is heated to 100-220 ℃, add activated waste rubber powder and at 4000-7000 rev/min velocity of shear down cut 30-90min, the weight ratio of described matrix pitch and described activated waste rubber powder is 75-92: 8-25, and described activated waste rubber powder is any described activated waste rubber powder among the claim 1-7.
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| CN102020859A (en) * | 2010-11-11 | 2011-04-20 | 浙江沃普曼高新建材有限公司 | Modified asphalt composition with creeping characteristic and preparation method thereof |
| CN102604180A (en) * | 2012-02-10 | 2012-07-25 | 中胶橡胶资源再生有限公司 | High-concentration modifying rubber powder and preparation method thereof |
| CN102976649A (en) * | 2011-09-06 | 2013-03-20 | 北京化工大学 | Warm-mixing agent used for waste-rubber-powder-modified asphalt, and preparation method thereof |
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| CN110872448A (en) * | 2018-08-30 | 2020-03-10 | 中国石油化工股份有限公司 | Ultraviolet aging resistant waste rubber powder modified asphalt and preparation method thereof |
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| CN115304841A (en) * | 2022-07-14 | 2022-11-08 | 河北交科材料科技有限公司 | Pretreatment rubber powder for high-volume rubber modified asphalt and preparation method thereof |
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| CN102020859A (en) * | 2010-11-11 | 2011-04-20 | 浙江沃普曼高新建材有限公司 | Modified asphalt composition with creeping characteristic and preparation method thereof |
| CN102976649A (en) * | 2011-09-06 | 2013-03-20 | 北京化工大学 | Warm-mixing agent used for waste-rubber-powder-modified asphalt, and preparation method thereof |
| CN102976649B (en) * | 2011-09-06 | 2014-07-02 | 北京化工大学 | Warm-mixing agent used for waste-rubber-powder-modified asphalt, and preparation method thereof |
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| CN105482474A (en) * | 2015-12-28 | 2016-04-13 | 天津海泰环保科技发展有限公司 | Low-viscosity crumb rubber modified asphalt and preparation method thereof |
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