CN104693820B - It is a kind of can stable storage the particle modified asphalt of compound shoddy and preparation method thereof - Google Patents
It is a kind of can stable storage the particle modified asphalt of compound shoddy and preparation method thereof Download PDFInfo
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Abstract
It is a kind of can stable storage the particle modified asphalt of compound shoddy and preparation method thereof, deep desulfuration degradation first is carried out to the rubber powder of low mesh number, prepare high desulfurization degree reclaimed rubber, then it recycles and adds high mesh number rubber powder and high desulfurization degree reclaimed rubber and a small amount of crosslinking agent according to a certain percentage, prepare compound shoddy particle, it is mixed to prepare modified pitch with matrix pitch again, by modified pitch and gathers materials and is mixed to prepare modified asphalt mixture.This compound shoddy particle, the linear macromolecule in high desulfurization degree reclaimed rubber, which is uniformly wrapped up in, invests vulcanized rubber powder, while using micro- crosslinked action of crosslinking agent, forming a kind of " nucleocapsid " structure of linear macromolecule cross-linked structure.A large amount of linear molecules in this structure can mutually tangle in pitch, then form stable rubber powder pitch reticular structure, achieve the purpose that the rubber powder modified asphalt mixture for preparing stable storage.
Description
Technical field
The present invention relates to a kind of compound particle modified asphalts of shoddy and preparation method thereof, belong to following for scrap rubber
Ring regeneration field.
Background technology
Polymer modified asphalt and polymer modified asphalt mixture are generally acknowledged excellent because of its excellent high temperature performance
Ground surface material, and waste rubber powder modified asphalt is the hot spot of research in recent years.Domestic external application rubber powder modified asphalt mixture is laid with highway
Has history for many years.The Successful Practice in the especially U.S. shows：Waste Crumb rubber modified asphalt road surface is thinned than pitch road surface
Half, and its service life doubles, and can improve heat-resisting, the cold resistance on road surface, and noise, damp proof can be reduced
Sliding, trash ice snow, improves safety coefficient, especially cheap.The addition of shoddy can enhance toughness, can effective adsorptive pitch
In oily wax, reduce dissociate wax content, so that the response to temperature of pitch is declined, caking property raising.Not only with waste rubber powder modified asphalt
It is cheap, and certain performances are better than SBS modified pitch.
In recent years, China also had carried out some research work to rubber powder modified asphalt.Nevertheless, domestic experiment work
Show rubber powder modified asphalt there are rubber powder aging in modifying process is serious, rubber powder is not easy to disperse, modified pitch high temperature viscosity it is big and
Caused poor fluidity, during storage rubber powder be easy with pitch due to interface cohesion is bad and cause rubber powder and pitch be layered from
The main problems such as analysis, although domestic waste rubber powder modified asphalt has had small-scale application, since these problems are difficult to solve,
Even to this day, plantmix's rubber powder modified asphalt production of large-scale is not had to emerge.
Rubber powder modified asphalt thermmal storage is unstable to be mainly manifested in：
(1) rubber powder is combined with asphalt interface bad leads to rubber powder and pitch laminated segregation
(2) since the softening point for continuing to degrade and cause modified pitch of rubber powder etc. is each during rubber powder modified asphalt heat is deposited
The decaying of item index.
Currently, be also further studied for the improvement of rubber powder modified asphalt performance both at home and abroad, but there are still each
Kind problem.CN101805524 discloses a kind of waste Crumb rubber modified asphalt preparation method of high-temperature storage property.This method is sharp first
Making a certain proportion of waste plastics (PE) with the blending effect of twin-screw, blending extrusion rubber and plastic under the conditions of 100-180 DEG C is total with rubber powder
Mixed particle, then prepares modified pitch by a certain proportion of rubber powder and above-mentioned rubber plastic blend particle doped matrix pitch.This method
The waste plastics containing higher proportion of rubber plastic blend particle, although being added to a small amount of compatilizer, since the low temperature of PE is crisp
Property and it is incompatible with the extreme of pitch, will have a direct impact on modified pitch low-temperature ductility so that influence asphalt low temperature properties
Energy.CN103146206A discloses a kind of preparation method of the composite modified asphalt of stable storing.This method is first with double spiral shells
A certain proportion of SBS is prepared SBS/ rubber powder particles by the blending effect of bar with compound be blended of rubber powder, then by a certain proportion of SBS
And SBS rubber powder compound particle doped matrix pitches prepare modified pitch.The SBS that part is mixed during this method can directly be led
The cost of modified pitch is caused to increase, meanwhile, composite S BS and rubber powder under the conditions of 180-300 DEG C of high temperature, Strong shear can be direct
The degradation for leading to SBS directly affects the effects of this part SBS in modified pitch.CN101824226A discloses a kind of heat storage
Deposit the preparation method of stable appts of modified asphalt by utilizing waste tyre rubber powder.This method is first with the aqueous solution of silane coupling agent to rubber powder
It is coated, asphalt modification then is carried out to the rubber powder after coating.This method coats rubber powder, a large amount of aqueous solution using aqueous solution
It can remain between rubber powder, these moisture can evaporate rapidly to form a large amount of steam in modified pitch, cause the excessive tank of pitch and formed
Production accident, while expensive silane coupling agent can directly promote modified pitch cost.
Invention content
It is an object of the invention to overcome the shortcomings of the above problem, propose it is a kind of can it is evenly dispersed in pitch, high temperature is steady
Surely the modified asphalt mixture and preparation method thereof of the compound shoddy particle stored.This method technical process is simple, environmental protection, no
Scrap rubber only can be largely consumed, the secondary pollution during scrap rubber recycles is eliminated, while modified pitch company may be implemented
Continuous metaplasia production, modified asphalt mixture property indices are excellent, and high-temperature storage is stablized.
Technical solution of the present invention is as follows：
It is a kind of can stable storage the particle modified asphalt of compound shoddy preparation method, it is characterised in that including
Following step：
(1) it is 100 by mass ratio：3-20：The low mesh number rubber powder of 0.3-4, softening oil, activator are in homogenizer
The first rank screw extruder is added to after pretreatment, material pressure continuously squeezes out after reacting 5-20min from mouth mold in 2-20MPa
High desulfurization degree reclaimed rubber；
(2) second-order screw extruder is added in the high desulfurization degree reclaimed rubber, adds high mesh number rubber powder and friendship
Join agent, wherein high mesh number rubber powder, high desulfurization degree reclaimed rubber, crosslinking agent mass ratio be 20-50:50-80:0.1-0.6, machine
Cylinder pressure 2-20MPa is squeezed out, granulation prepares compound shoddy powder；The wherein described low mesh number rubber powder is 5-30 mesh, high mesh
Number rubber powder is 40-200 mesh；
(3) matrix pitch is heated to 160-200 DEG C, it is 20-50% that stirring, which is added and accounts for the mass percent of matrix pitch,
The compound shoddy particle heat-insulating premix 5-100 minute, followed by colloid mill shearing, grind 10-50min, in the process
The stabilizer for accounting for that the mass percent of matrix pitch is 0.1-3% is added；Heat preservation development 60- is quickly stirred with 100-500 revs/min
300 minutes, prepare modified pitch；
(4) modified pitch is added in gathering materials and modified asphalt mixture is made, it is described to gather materials and modified pitch
Bitumen aggregate ratio is 5.3-5.7.
Screw extruder is double screw extruder or single screw extrusion machine.
The preferred first rank screw extruder is equidirectional parallel double-screw extruder, draw ratio 20-60, screw diameter
30-120, control twin-screw difference zone temperatures at 100-380 DEG C, control screw speed in 10rpm-300rpm,；Described second
Rank screw extruder be single screw extrusion machine, draw ratio 15-40, screw diameter 50-120, control barrel temperature at 80-200 DEG C,
Screw speed 10-200rpm.
The pretreatment preferably stirs 10-30min at 50-100 DEG C.
The rubber powder is preferably one or more of damaged tire, useless hand cart tyre, useless conveyer belt, scrap rubber shoes.
The softening oil is preferably one or more of pine tar, naphthenic oil, tall oil, aromatic naphtha, rosin.
The activator is preferably in phenyl disulfide, benzenethiol, polyalkylbenzene phenol disulphide, octadecylamine
It is one or more of.
The sol content of the preferred high desulfurization degree reclaimed rubber is more than 80%, and Mooney viscosity is less than 1, Sol molecular weight
More than 10,000, gel cross-linkage density is less than 5 × 10-5, polydispersity coefficient PDI is more than 5.
The crosslinking agent is preferably one or more of Cosan, rush M, TMTD, metal oxide.
The particle modified asphalt of compound shoddy prepared according to above-described preparation method.
Advantageous effect：
The present invention proposes the high temperature using double screw extruder, Strong shear effect first carries out depth to the rubber powder of low mesh number
Desulfurization is degraded, and high desulfurization degree reclaimed rubber is prepared, and the low temperature of single screw extrusion machine, blending is then recycled to act on according to a certain percentage
High mesh number rubber powder and high desulfurization degree reclaimed rubber and a small amount of crosslinking agent are added, compound shoddy particle is prepared and is further changed
Property asphalt.This compound shoddy particle, the linear macromolecule in high desulfurization degree reclaimed rubber, which is uniformly wrapped up in, invests rubber powder table
Face, while using micro- crosslinked action of crosslinking agent, forming a kind of " nucleocapsid " structure of linear macromolecule-cross-linked structure.This knot
A large amount of linear molecules in structure can mutually tangle in pitch, then form stable rubber powder-pitch reticular structure, reach system
The purpose of the rubber powder modified asphalt mixture of standby stable storage.It is specific as follows：
(1) high desulfurization degree reclaimed rubber is prepared using double screw extruder, it is sharp again that traditional scrap rubber can be efficiently controlled
With " secondary pollutions " such as waste water, the exhaust gas generated in the process, the scrap rubber environment-friendly type regeneration belonged to truly utilizes；
(2) utilize the evenly dispersed of single screw extrusion machine, high desulfurization degree reclaimed rubber can uniform physics wrap up in and be attached to rubber powder
Particle surface, while using micro- crosslinking of crosslinking agent, high desulfurization degree reclaimed rubber being promoted to form micro- chemical crosslinking with rubber powder particle, after
And stable " nucleocapsid " structure is formed, this " nucleocapsid " structure mutually tangles in pitch, forms stable reticular structure, reach
Improve the purpose of rubber powder modified asphalt storage stability；
(3) high desulfurization degree reclaimed rubber, linear molecule content is high (being higher than 80%), and average molecular weight is big (being more than 10,000), more
The coefficient of dispersion is big (PDI ＞ 5), and gel cross-linkage density is small.Since PDI is big, the virtue of small-molecular-weight colloidal sol and matrix pitch therein
Fragrant part is similar, and fragrant part missing caused by being swollen due to rubber powder particle can be supplemented in modified pitch, improves modified pitch
High temperature viscosity, convenient for modified pitch production, transport and mix；
(4) high desulfurization degree reclaimed rubber, apparent very glutinous, Mooney viscosity is very low, is not easy to storage, transport, is added common
Rubber powder mixing after being granulated, can solve this problem, be convenient for packaging, storage and the transport of high desulfurization degree reclaimed rubber.
Specific implementation mode
Content for a clearer understanding of the present invention will in further detail be illustrated by specific embodiment.
Below by by the comparative example 1,2 using only General Purpose Rubber powder, with the rubber powder particle prepared according to the method for the present invention
The embodiment 1-11 for being modified to obtain modified asphalt mixture is compared, and shows the particle modified drip of rubber powder using the present invention
The performance difference of green mixture and common rubber powder modified asphalt mixture.
Stabilizer in following embodiment is using Cosan, the compound stabilizer of zinc oxide, stearic acid, TMTD, quality
Than for：Cosan 80wt%, zinc oxide 5wt%, stearic acid 10wt%, TMTD5wt%, stabilizer can also be Cosan, contain
The mixture of one or more of sulphur compound.Crosslinking agent uses Cosan.
The rubber powder of height desulfurization regeneration glue preparation is the full tire meridian glue rubber powder of 5 purposes in following embodiment, can also be
Car tire, hand cart tyre, conveyer belt rubber powder.
The high mesh number rubber powder of modified pitch is the full tire meridian glue rubber powder of 40 purposes in following embodiment, can also be car
Tire, hand cart tyre, conveyer belt rubber powder.
The softening oil of height desulfurization regeneration glue is environment-friendly type pine tar in following embodiment, can also be tall oil, ring
One kind in alkane oil, rosin, aromatic naphtha.
The activator of height desulfurization regeneration glue is 420 in following embodiment, can also be 450,480 or diphenyl
One or more of two sulphur, benzenethiol, octadecylamine mixture.
In following embodiment, by rubber powder, softening oil, activator according to weight ratio in homogenizer at 80 DEG C or so
20min or so is pre-processed, is dosed to the first rank double screw extruder, control twin-screw difference zone temperatures are in 100-380
℃.Wherein, first segment：150-200 DEG C, second segment：250-300℃；Third section：300-350℃；4th section：300-350℃；
5th section：150-200℃.Screw speed is controlled in 20-70rpm.After reaction 5-20min height desulfurization is continuously squeezed out from mouth mold again
Raw rubber.Then, height desulfurization regeneration glue enters second-order single screw extrusion machine by connector metering.Pass through hopper meter simultaneously
The homogeneous mixture of high mesh number rubber powder and crosslinking agent is added in amount, and control extruder cylinder of single screw extruder temperature is at 100-150 DEG C；Control
Screw speed 30-100rpm.After uniformly squeezing out, compound shoddy particle is prepared by water cooling granulation.
Comparative example 1：
20%40 mesh rubber powders are weighed by matrix pitch weight ratio, is added in matrix pitch and quickly stirs 15min, then
0.4% stabilizer is added in stirring, grinds 1 time (10min) using colloid mill, and bred at 170-175 DEG C 4 hours, is made
Modified pitch simultaneously tests performance of modified bitumen.
Comparative example 2：
25%40 mesh rubber powders are weighed by matrix pitch weight ratio, is added in matrix pitch and quickly stirs 15min, then
0.4% stabilizer is added in stirring, grinds 1 time (10min) using colloid mill, and bred at 170-175 DEG C 4 hours, is made
Modified pitch simultaneously tests performance of modified bitumen.
Embodiment 1：
By 5 mesh rubber powders, softening oil, activator according to weight ratio be 100：5：2 locate in homogenizer at 70 DEG C in advance
15min is managed, the first rank double screw extruder is dosed to, from die extrusion height desulfurization regeneration glue after clipped, reaction.With
Afterwards, height desulfurization regeneration glue enters second-order single screw extrusion machine by connector metering, while adjusting hopper feed speed
It is 80 according to height desulfurization regeneration glue, 40 mesh rubber powders, crosslinking agent weight ratio：20：0.1 is added 40 mesh rubber powders, uniformly mixes, squeezes
Go out, composite glue powder particle is prepared by water cooling granulation.30% composite glue powder particle is weighed by matrix pitch weight ratio, is added to base
15min is quickly stirred in matter pitch, is subsequently agitated for being added 0.4% stabilizer, 1 time (10min) is ground using colloid mill, and
It is bred at 170-175 DEG C 4 hours, modified pitch is made and tests performance of modified bitumen.
Embodiment 2：
By rubber powder, softening oil, activator according to weight ratio be 100：10：1 pre-processes in homogenizer at 70 DEG C
15min is dosed to the first rank double screw extruder, from die extrusion height desulfurization regeneration glue after clipped, reaction.With
Afterwards, height desulfurization regeneration glue enters second-order single screw extrusion machine by connector metering, while adjusting hopper feed speed
It is 70 according to height desulfurization regeneration glue, 40 mesh rubber powders, crosslinking agent weight ratio:30:0.3 is added 40 mesh rubber powders and crosslinking agent, uniformly
Mixing squeezes out, and composite glue powder particle is prepared by water cooling granulation.30.1% compound adhesive powder is weighed by matrix pitch weight ratio
Son is added in matrix pitch and quickly stirs 15min, is subsequently agitated for being added 0.4% stabilizer, is ground 1 time using colloid mill
(10min), and bred at 170-175 DEG C 4 hours, modified pitch is made and tests performance of modified bitumen.
Embodiment 3：
By rubber powder, softening oil, activator according to weight ratio be 100：15：3 pre-process in homogenizer at 70 DEG C
15min is dosed to the first rank double screw extruder, from die extrusion height desulfurization regeneration glue after clipped, reaction.With
Afterwards, height desulfurization regeneration glue enters second-order single screw extrusion machine by connector metering, while adjusting hopper feed speed
It is 60 according to height desulfurization regeneration glue, 40 mesh rubber powders, crosslinking agent weight ratio:40:0.5 is added 40 mesh rubber powders and crosslinking agent, uniformly
Mixing squeezes out, and composite glue powder particle is prepared by water cooling granulation.30.2% compound adhesive powder is weighed by matrix pitch weight ratio
Son is added in matrix pitch and quickly stirs 15min, is subsequently agitated for being added 0.4% stabilizer, is ground 1 time using colloid mill
(10min), and bred at 170-175 DEG C 4 hours, modified pitch is made and tests performance of modified bitumen.
Embodiment 4：
By rubber powder, softening oil, activator according to weight ratio be 100：5：1 pre-processes in homogenizer at 70 DEG C
15min is dosed to the first rank double screw extruder, from die extrusion height desulfurization regeneration glue after clipped, reaction.With
Afterwards, height desulfurization regeneration glue enters second-order single screw extrusion machine by connector metering, while adjusting hopper feed speed
It is 60 according to height desulfurization regeneration glue, 40 mesh rubber powders, crosslinking agent weight ratio:40:0.6 is added 40 mesh rubber powders and crosslinking agent, uniformly
Mixing squeezes out, and composite glue powder particle is prepared by water cooling granulation.30.1% compound adhesive powder is weighed by matrix pitch weight ratio
Son is added in matrix pitch and quickly stirs 15min, is subsequently agitated for being added 0.4% stabilizer, is ground 1 time using colloid mill
(10min), and bred at 170-175 DEG C 4 hours, modified pitch is made and tests performance of modified bitumen.
Embodiment 5：
By rubber powder, softening oil, activator according to weight ratio be 100：5：3 pre-process in homogenizer at 70 DEG C
15min is dosed to the first rank double screw extruder, from die extrusion height desulfurization regeneration glue after clipped, reaction.With
Afterwards, height desulfurization regeneration glue enters second-order single screw extrusion machine by connector metering, while adjusting hopper feed speed
It is 80 according to height desulfurization regeneration glue, 40 mesh rubber powders, crosslinking agent weight ratio:20:0.2 is added 40 mesh rubber powders and crosslinking agent, uniformly
Mixing squeezes out, and composite glue powder particle is prepared by water cooling granulation.30.1% compound adhesive powder is weighed by matrix pitch weight ratio
Son is added in matrix pitch and quickly stirs 15min, is subsequently agitated for being added 0.4% stabilizer, is ground 1 time using colloid mill
(10min), and bred at 170-175 DEG C 4 hours, modified pitch is made and tests performance of modified bitumen.
Embodiment 6：
By rubber powder, softening oil, activator according to weight ratio be 100：18：0.5 locates in homogenizer at 70 DEG C in advance
15min is managed, the first rank double screw extruder is dosed to, from die extrusion height desulfurization regeneration glue after clipped, reaction.With
Afterwards, height desulfurization regeneration glue enters second-order single screw extrusion machine by connector metering, while adjusting hopper feed speed
It is 75 according to height desulfurization regeneration glue, 40 mesh rubber powders, crosslinking agent weight ratio:25:0.2 is added 40 mesh rubber powders and crosslinking agent, uniformly
Mixing squeezes out, and composite glue powder particle is prepared by water cooling granulation.35.1% compound adhesive powder is weighed by matrix pitch weight ratio
Son is added in matrix pitch and quickly stirs 15min, is subsequently agitated for being added 0.4% stabilizer, is ground 1 time using colloid mill
(10min), and bred at 170-175 DEG C 4 hours, modified pitch is made and tests performance of modified bitumen.
Embodiment 7：
By rubber powder, softening oil, activator according to weight ratio be 100：3：4 pre-process in homogenizer at 70 DEG C
15min is dosed to the first rank double screw extruder, from die extrusion height desulfurization regeneration glue after clipped, reaction.With
Afterwards, height desulfurization regeneration glue enters second-order single screw extrusion machine by connector metering, while adjusting hopper feed speed
It is 70 according to height desulfurization regeneration glue, 40 mesh rubber powders, crosslinking agent weight ratio:30:0.2 is added 40 mesh rubber powders and crosslinking agent, uniformly
Mixing squeezes out, and composite glue powder particle is prepared by water cooling granulation.40.1% compound adhesive powder is weighed by matrix pitch weight ratio
Son is added in matrix pitch and quickly stirs 15min, is subsequently agitated for being added 0.4% stabilizer, is ground 1 time using colloid mill
(10min), and bred at 170-175 DEG C 4 hours, modified pitch is made and tests performance of modified bitumen.
Embodiment 8：
By rubber powder, softening oil, activator according to weight ratio be 100：20：0.3 locates in homogenizer at 70 DEG C in advance
15min is managed, the first rank double screw extruder is dosed to, from die extrusion height desulfurization regeneration glue after clipped, reaction.With
Afterwards, height desulfurization regeneration glue enters second-order single screw extrusion machine by connector metering, while adjusting hopper feed speed
It is 65 according to height desulfurization regeneration glue, 40 mesh rubber powders, crosslinking agent weight ratio:35:0.2 is added 40 mesh rubber powders and crosslinking agent, uniformly
Mixing squeezes out, and composite glue powder particle is prepared by water cooling granulation.40.1% compound adhesive powder is weighed by matrix pitch weight ratio
Son is added in matrix pitch and quickly stirs 15min, is subsequently agitated for being added 0.4% stabilizer, is ground 1 time using colloid mill
(10min), and bred at 170-175 DEG C 4 hours, modified pitch is made and tests performance of modified bitumen.
Embodiment 9：
By rubber powder, softening oil, activator according to weight ratio be 100：5：2 pre-process in homogenizer at 70 DEG C
15min is dosed to the first rank double screw extruder, from die extrusion height desulfurization regeneration glue after clipped, reaction.With
Afterwards, height desulfurization regeneration glue enters second-order single screw extrusion machine by connector metering, while adjusting hopper feed speed
It is 60 according to height desulfurization regeneration glue, 40 mesh rubber powders, crosslinking agent weight ratio:40:0.2 is added 40 mesh rubber powders and crosslinking agent, uniformly
Mixing squeezes out, and composite glue powder particle is prepared by water cooling granulation.35.1% compound adhesive powder is weighed by matrix pitch weight ratio
Son is added in matrix pitch and quickly stirs 15min, is subsequently agitated for being added 0.4% stabilizer, is ground 1 time using colloid mill
(10min), and bred at 170-175 DEG C 4 hours, modified pitch is made and tests performance of modified bitumen.
Embodiment 10：
By rubber powder, softening oil, activator according to weight ratio be 100：5：2 pre-process in homogenizer at 70 DEG C
15min is dosed to the first rank double screw extruder, from die extrusion height desulfurization regeneration glue after clipped, reaction.With
Afterwards, height desulfurization regeneration glue enters second-order single screw extrusion machine by connector metering, while adjusting hopper feed speed
It is 55 according to height desulfurization regeneration glue, 40 mesh rubber powders, crosslinking agent weight ratio:45:0.2 is added 40 mesh rubber powders and crosslinking agent, uniformly
Mixing squeezes out, and composite glue powder particle is prepared by water cooling granulation.30.1% compound adhesive powder is weighed by matrix pitch weight ratio
Son is added in matrix pitch and quickly stirs 15min, is subsequently agitated for being added 0.4% stabilizer, is ground 1 time using colloid mill
(10min), and bred at 170-175 DEG C 4 hours, modified pitch is made and tests performance of modified bitumen.
Embodiment 11：
By rubber powder, softening oil, activator according to weight ratio be 100：5：2 pre-process in homogenizer at 70 DEG C
15min is dosed to the first rank double screw extruder, from die extrusion height desulfurization regeneration glue after clipped, reaction.With
Afterwards, height desulfurization regeneration glue enters second-order single screw extrusion machine by connector metering, while adjusting hopper feed speed
It is 50 according to height desulfurization regeneration glue, 40 mesh rubber powders, crosslinking agent weight ratio:50:0.2 is added 40 mesh rubber powders and crosslinking agent, uniformly
Mixing squeezes out, and composite glue powder particle is prepared by water cooling granulation.25.1% compound adhesive powder is weighed by matrix pitch weight ratio
Son is added in matrix pitch and quickly stirs 15min, is subsequently agitated for being added 0.4% stabilizer, is ground 1 time using colloid mill
(10min), and bred at 170-175 DEG C 4 hours, modified pitch is made and tests performance of modified bitumen.
1 high desulfurization degree reclaimed rubber physical property of table
2 performance of modified bitumen of table
Modified asphalt material in embodiment is added in asphalt, it is real by Marshall experiment, high-temperature stability
Test, water stability experiment, crack resistance at low-temperature experiment, experimental result is as shown in table 3：
Table 3
The hot storage stability that Tables 1 and 2 can be seen that high desulfurization degree reclaimed rubber and rubber powder compound particle modified pitch is wanted
It is substantially better than the hot storage stability of common rubber powder modified asphalt, meanwhile, the modified drip of items of composite glue powder particle of the invention
Green index is better than or no worse than common rubber powder modified asphalt and volume can be greatly promoted without influencing high temperature viscosity, easy to produce to apply
Work and further prepare mixture.There is influence, mistake to the hot storage stability of rubber powder compound particle in the crosslinking agent of different addition quantity
High or too low crosslinking agent will have a direct impact on the hot storage stability and modified pitch high temperature performance of modified pitch.In addition,
The reclaimed rubber composite glue powder particle of different desulfurization degree to the high temperature performance of modified pitch, to modified pitch high temperature viscosity and
The influence of hot storage stability is especially pronounced.The ratio of high desulfurization degree reclaimed rubber in composite glue powder particle is to each of modified pitch
Item index has the influence of highly significant, the influence of softening point, low-temperature ductility and hot storage stability especially pronounced.Composite glue powder
The ratio more high and low temperature ductility of high desulfurization degree reclaimed rubber in particle is better, and hot storage stability also improves therewith.But
Packaging, storage and the convenience of transport of rubber powder compound particle can be influenced by crossing a high proportion of height desulfurization regeneration glue.In short,
In the framework of the present definition, each performance can obtain a comprehensive raising, to ensure the performance of modified asphalt mixture
Also it can get a promotion.
Table 3 is as can be seen that (comparative example 1,2), drip prepared by the present invention compared with common waste rubber powder modified asphalt mixture
The bitumen aggregate ratio of green mixture maintains an equal level therewith substantially, has preferable economy.Meanwhile with common waste rubber powder modified asphalt mixture
Compared to (comparative example 1,2), the water stability of asphalt prepared by the present invention is better, and high temperature resistance rutting resistance and
Cold cracking property index is also more excellent.
The particle modified asphalt of composite glue powder of the present invention solves simple rubber powder modified asphalt mixture well
The bad problem of hot storage stability, the properties performance indicator of modified asphalt mixture is obviously integrally better than common glue
Powder-modified asphalt also solves packaging, storage, the transport problem of height desulfurization regeneration glue.
The above is only a preferred embodiment of the present invention, using preferred processing condition above-mentioned, mass ratio and difference
Additive component carries out multigroup experiment, and the result of above-mentioned improvement can be obtained.It should be pointed out that for the general of the art
For logical technical staff, various improvements and modifications may be made without departing from the principle of the present invention, these improve and
Retouching also should be regarded as protection scope of the present invention.
Claims (8)
1. it is a kind of can stable storage the particle modified asphalt of compound shoddy preparation method, it is characterised in that including under
State step：
(1) it is 100 by mass ratio：3-20：Low mesh number rubber powder, softening oil, the activator of 0.3-4 is located in advance in homogenizer
The first rank screw extruder is added to after reason, material pressure continuously squeezes out high take off from mouth mold in 2-20MPa after reacting 5-20min
Sulfur reclaimed rubber；
(2) second-order screw extruder is added in the high desulfurization degree reclaimed rubber, adds high mesh number rubber powder and crosslinking agent,
Wherein high mesh number rubber powder, high desulfurization degree reclaimed rubber, crosslinking agent mass ratio be 20-50:50-80:0.1-0.6, machine barrel pressure
Power 2-20MPa is squeezed out, granulation prepares compound shoddy particle；The wherein described low mesh number rubber powder is 5-30 mesh, high mesh number rubber
Powder is 40-200 mesh；
(3) matrix pitch is heated to 160-200 DEG C, stirring is added and accounts for the mass percent of matrix pitch as the institute of 20-50%
It states compound shoddy particle heat-insulating to premix 5-100 minutes, followed by colloid mill shearing, grinding 10-50min, be added in the process
The mass percent for accounting for matrix pitch is the stabilizer of 0.1-3%；Heat preservation development 60-300 is quickly stirred with 100-500 revs/min
Minute, prepare modified pitch；
(4) modified pitch is added in gathering materials and modified asphalt mixture is made, the oilstone to gather materials with modified pitch
Than for 5.3-5.7.
2. preparation method according to claim 1, it is characterised in that the first rank screw extruder is that cocurrent and parallel is double
Screw extruder, draw ratio 20-60, screw diameter 30-120, control twin-screw difference zone temperatures are at 100-380 DEG C, control
Screw speed is in 10rpm-300rpm；The second-order screw extruder is single screw extrusion machine, and draw ratio 15-40, screw rod is straight
Diameter 50-120, control barrel temperature is at 80-200 DEG C, screw speed 10-200rpm.
3. preparation method according to claim 2, it is characterised in that the pretreatment is to stir 10- at 50-100 DEG C
30min。
4. preparation method according to claim 1, it is characterised in that the softening oil be pine tar, naphthenic oil, aromatic naphtha,
One or more of rosin.
5. preparation method according to claim 1, it is characterised in that the activator be phenyl disulfide, benzenethiol,
One or more of polyalkylbenzene phenol disulphide, octadecylamine.
6. preparation method according to claim 1, it is characterised in that the sol content of the high desulfurization degree reclaimed rubber is big
In 80%, Mooney viscosity is less than 1, and Sol molecular weight is more than 10,000, and gel cross-linkage density is less than 5 × 10-5, polydispersity coefficient PDI is big
In 5.
7. preparation method according to claim 1, it is characterised in that the crosslinking agent be Cosan, captax,
One or more of TMTD, metal oxide.
8. the particle modified asphalt of compound shoddy prepared according to any preparation methods of claim 1-7.
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| CN105542496B (en) * | 2016-03-07 | 2018-03-09 | 翟根旺 | Uncured rubber-asphalt waterproof material and preparation method thereof |
| CN110343304B (en) * | 2018-04-02 | 2021-08-27 | 北京路德永泰环保科技有限公司 | Method for preparing rubber emulsion by using waste rubber and rubber emulsion prepared by method |
| CN109053033B (en) * | 2018-06-20 | 2019-11-22 | 河南城建学院 | Waste and old reclaimed rubber sole powder composite waste clothing regenerated fiber enhancing asphalt and preparation method thereof |
| CN111909529A (en) * | 2020-06-10 | 2020-11-10 | 北京克林泰尔环保科技有限公司 | Desulfurized waste tire rubber powder crosslinked modified asphalt and preparation method thereof |
| CN115746774A (en) * | 2022-11-19 | 2023-03-07 | 东南大学 | Normal-temperature fast-curing crack repairing agent, preparation method and application thereof |
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| CN102050965B (en) * | 2009-10-27 | 2013-01-09 | 中国石油化工股份有限公司 | Asphalt modifier granule composition and preparation method thereof |
| CN101747637B (en) * | 2010-02-03 | 2012-06-27 | 沈阳三鑫集团有限公司 | Low-temperature environment-friendly rubber asphalt and preparation method thereof |
| CN101817946A (en) * | 2010-04-19 | 2010-09-01 | 交通部公路科学研究所 | Activated waste rubber powder and preparation method thereof as well as modified asphalt and preparation method thereof |
| CN102040847A (en) * | 2010-12-03 | 2011-05-04 | 北京化工大学 | Asphalt modified by desulfurated rubber powder and preparation method thereof |
| CN102501331B (en) * | 2011-11-04 | 2014-05-07 | 北京化工大学 | Method for continuously preparing activated rubber powder |
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