CN104693821B - A kind of asphalt and preparation method using direct putting type high-adhesiveness modifying agent - Google Patents
A kind of asphalt and preparation method using direct putting type high-adhesiveness modifying agent Download PDFInfo
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- CN104693821B CN104693821B CN201510084402.9A CN201510084402A CN104693821B CN 104693821 B CN104693821 B CN 104693821B CN 201510084402 A CN201510084402 A CN 201510084402A CN 104693821 B CN104693821 B CN 104693821B
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Abstract
The present invention relates to a kind of asphalt and preparation method using direct putting type high-adhesiveness modifying agent.Asphalt is by gathering materials, direct putting type high-adhesiveness asphalt mixed material modifier and matrix pitch are mixed.Modifying agent is made up of high desulfurization degree reclaimed rubber, modified high temperature coal-tar pitch and skeletal support agent by stirring extrusion.Using the high temperature of double screw extruder, high shear forces deep activation scrap rubber, high desulfurization degree reclaimed rubber is obtained；Then, the mixture through the modified modification high temperature coal-tar pitch of rubber cracking oil, high desulfurization degree reclaimed rubber and skeletal support material is sufficiently mixed using screw rod, extrusion, granulation prepare direct putting type high-adhesiveness asphalt mixed material modifier, finally by the modifying agent and gather materials and matrix pitch is mixed to prepare direct putting type high-adhesiveness asphalt.The asphalt of the present invention has excellent water resistant evil ability, good high temperature anti-rut behavior and crack resistance at low-temperature.
Description
Technical field
The present invention relates to a kind of ground surfacing material, more particularly to a kind of pitch using direct putting type high-adhesiveness modifying agent
Compound and preparation method, belong to traffic and overlay field of material technology.
Background technology
With developing rapidly for highway in China carrier, vehicle maximization, heavy duty, overloading are increasingly severe.Perhaps
The road surfaces being completed soon there have been disease more, or even to shift to an earlier date overhaul, and this also indicates that asphalt concrete road surface can not expire
Sufficient highroad carrier does harm to the requirement of ability to its high temperature Rut resistance stability, crack resistance at low-temperature, water resistant.It is therefore, public
Road builders are also taking more methods improvement modified pitch and pitch addition while asphalt surface course structure is improved
The performance of agent solves the above problems.Polymer modified asphalt is generally acknowledged excellent road surface material because of its excellent high temperature performance
Material, wherein waste rubber powder modified asphalt is the focus of research in recent years.Both at home and abroad highway has been laid with rubber powder modified asphalt for many years
The Successful Practice of history, the especially U.S. shows：Half is thinned than pitch road surface in waste Crumb rubber modified asphalt road surface, and it makes
But doubled with the life-span, it can improve heat-resisting, the cold resistance on road surface, and can reduce noise, anti-wet and slippery, trash ice snow, carry
High safety factor, it is especially cheap.
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 has in modifying process that rubber powder aging is serious, and rubber powder is not easy to disperse, modified pitch high temperature viscosity it is big and
Caused poor fluidity, during storage rubber powder easily with pitch due to interface cohesion it is bad and cause rubber powder and pitch be layered from
The subject matters such as analysis, although domestic waste rubber powder modified asphalt has had small-scale application, because these problems are difficult to solve,
Even to this day, the plantmix's rubber powder modified asphalt production for not having large-scale emerges.In addition, wet-process modified pitch is needed by height
Temperature, Strong shear grinding, modifying agent can be dispersed in pitch.These processes not only increase the consumption of the energy, also can
Cause the secondary pollution of environment.Dry method rubber asphalt can partly solve the above problems, still, because rubber powder directly delivers entrance
High temperature building stones MIXING SYSTEM CONTROLLED BY, it can cause to catch fire, the problem of flue gas is big, and substantial amounts of rubber powder puts into rapidly MIXING SYSTEM CONTROLLED BY, is not easy fast
Fast mix is uniform, causes performance of asphalt mixture index unstable.Because rubber powder and pitch do not have good interface binding power, its
Wrap up in attached performance with building stones and can also have a greatly reduced quality, further can influence the water stability of asphalt and high temperature performance refer to
Mark.
In view of the above-mentioned problems, the existing Patents report of domestic and international researcher.Patent CN102086279A proposes one kind
Suitable for asphalt pavement particles additive and its preparation and application.This method mainly using 40-80 parts high molecular polymer,
After 5-30 parts rubber powder and 5-10 part wax uniform stirrings by the mixing of rubber refining machine, extruding pelletization, air-dry prepare rubber powder
Grain additive, and prepare asphalt with this particle direct putting type.The high molecular polymer of this method is mainly engineering plastics
Class, and content is high, although the high temperature rutting resistance of asphalt can be improved to a certain extent, to cryogenic property
Influence also accordingly amplify.In addition, the addition of rubber powder, although can partly improve the cryogenic property of asphalt,
This rubber powder is relatively poor with the interface binding power of pitch due to substantially not activated, and the attached performance of wrapping up in building stones also can be by shadow
Ring, therefore the improvement to the water resistant evil ability of asphalt is limited.
Patent CN102952293A discloses a kind of composite glue powder modifying agent and its preparation method and application method.This method
By rubber powder, solubilizer, auxiliary agent at normal temperatures, 0.5-5 hours are stirred, prepare composite glue powder modifying agent.Produced in bituminous concrete
During, the composite glue powder modifying agent is directly added into compound mix pot, prepares drip with building stones, asphalt mixing at high temperature
Blue or green compound.The solubilizer of this method is small molecule swelling oil, and rubber powder is tentatively swelled.This method is closer to traditional
Dry method rubber-asphalt mixture, to the high temperature performance index of compound, the improvement of especially water resistant evil ability helps less.
Patent CN102702601A discloses a kind of Direct addition type rubber powder composite asphalt mixture modifier and preparation method thereof.
This method passes through polyethylene, polyacrylic mixture and waste tyre rubber powder, binder resin, asphalt material, inorganic filler mixed
Close, stir, being heated under conditions of 140-220 DEG C, is kneaded, extruding pelletization prepares compound particle.Activation of this method to rubber powder
The interface binding power that acts on limited, not activated rubber powder pitch is relatively weak, wraps up in attached property with building stones and can also decline, then shadow
Ring the water resistant evil ability of asphalt.Birdsed of the same feather flock together compound furthermore, while this method also fills part engineering plastics, pitch is mixed
The high-temperature behavior of material has lifting, still, can also directly result in the decline of cryogenic property.
The content of the invention
It is an object of the invention to overcome the shortcomings of above mentioned problem, disclose a kind of using direct putting type high-adhesiveness modifying agent
Asphalt, there is excellent high and low temperature performance and wrap up in attached performance.Modifying agent can direct plunge into compound mix, fast
The dissolving of speed, stone surface is uniformly dispersed in, and fire incident will not be caused because of high temperature.Direct putting type technique is simple, saves
Energy resource consumption in wet-process modified pitch, the secondary pollution for avoiding high-temperature flue gas from bringing.And disclose the system of the asphalt
Preparation Method.
The technical scheme is that：
A kind of asphalt using direct putting type high-adhesiveness modifying agent, it is characterised in that by mass ratio be 100：3-7：
The gathering materials of 0.3-0.9, matrix pitch and direct putting type high-adhesiveness asphalt mixed material modifier mix：
It by mass ratio is 30-50 that wherein described direct putting type high-adhesiveness asphalt mixed material modifier, which is,：30-50：5-20's
High desulfurization degree reclaimed rubber, modified high temperature coal-tar pitch and skeletal support agent are made by stirring extrusion；
The high devulcanized re-cycled rubber is 100 by mass ratio：3-20：0.3-4 waste Crumb rubber, softening oil and activator leads to
Stirring extrusion is crossed to be made；
The modified high temperature coal-tar pitch is that the rubber that mass fraction is 5-20% is added in high temperature coal-tar pitch
Cracked oil is made, and the rubber cracking oil is the overcritical of 5-12 parts in mass fraction by waste Crumb rubber that mass fraction is 1 part
Cracking reaction is made under toluene atmosphere；
It by mass ratio is 10-30 that the skeletal support agent, which is,：70-90 20-60 mesh waste Crumb rubber and PE, PP or regeneration
PE, PP are mixed to prepare.
The waste Crumb rubber is the one or more in damaged tire, useless hand cart tyre, useless conveyer belt, scrap rubber footwear；The softening
Oil is pine tar, one kind in naphthenic oil, tall oil, aromatic naphtha, rosin；The activator be phenyl disulfide, benzenethiol,
Polyalkylbenzene phenol disulphide, one kind or mixture in octadecylamine.
The sol content of the high desulfurization degree reclaimed rubber is more than 80%, and Mooney viscosity is less than 1, and Sol molecular weight is more than 1
Ten thousand, gel cross-linkage density is less than 5 × 10-5, polydispersity coefficient (PDI) is more than 5.
The modified high temperature coal-tar pitch is 5-20 by mass ratio：100 rubber cracking oil and high temperature coal-tar pitch
Stirring shearing is made, and the high temperature coal-tar pitch is the solid residue through high temperature coal-tar distillation gained.
The rubber cracking oil, which forms, is：Aromatic hydrocarbon：82-93%, molecular weight：300-2000；Alkene-alkane：7-18%, point
Son amount≤300.
60-80 DEG C of the softening point of the high temperature coal-tar, toluene insolubles content 10-20%, quinoline insolubles content
0.2-2.5%, moisture are less than 4%；The needle penetration of the modified high temperature coal-tar：65-90, softening point：51-59 DEG C, 15 DEG C are prolonged
Degree >=85cm.
The preparation method of above-mentioned asphalt, it is characterised in that comprise the steps：
By 5-20 mesh waste Crumb rubber and toluene according to mass ratio 1：5-12 puts into reactor, and heating forms supercritical toluene atmosphere
Enclose, cooled down after cracking reaction 30-120min and collect pyrolysis product and stand for a period of time, isolated yellow rubber cracking fluid
Body；
High temperature coal-tar pitch is heated to 130-180 DEG C to flow regime, it is the described of 5-20% to add mass fraction
Rubber cracking oil, stirring, shearing prepare modified high temperature coal-tar pitch；
By the waste Crumb rubber, softening oil, activator according to mass ratio 100：3-20：0.3-4 is in 50-100 DEG C of pretreatment
10-30min, the first rank screw extruder is dosed to, controlling different zone temperatures, material pressure is in 8- at 150-350 DEG C
High desulfurization degree reclaimed rubber is continuously extruded after 20MPa, stirring reaction 5-20min from mouth mold；
It is 30-50 by mass ratio：30-50：The 5-20 high desulfurization degree reclaimed rubber, modified high temperature coal-tar pitch and
Skeletal support agent is added separately to second-order screw extruder, controls 100-170 DEG C of barrel zone temperature, barrel pressure 5-15MPa, stirs
Mix uniformly extrusion, granulation and prepare direct putting type high-adhesiveness asphalt mixed material modifier；
It will gather materials and be heated to 160-190 DEG C, and put into the asphalt mixed material modifier of the aggregate quality than 0.3-0.9, do
Mix the 5-20 seconds, it is matrix pitch than 150-180 DEG C of 3-7 then to put into aggregate quality, the mix 60-200 seconds, it is two-sided hit it is real into
Type.
Preferably, temperature is 350-400 DEG C, pressure 4.5-9MPa in the supercritical toluene atmosphere, and heating rate is
3-5 DEG C/minute.
Preferably, with high temperature coal-tar and rubber cracking oil mixing described in 100-300 revs/min of speed stirring 10-30min
Thing, described change is obtained with mixture described in 10000-30000 revs/min of speed shearing 20-50min using high-speed shearing emulsion machine
Property high temperature coal-tar pitch.
Preferably, the first rank screw extruder is equidirectional parallel double-screw extruder, draw ratio 50-100, and screw rod is straight
Footpath 50-120, screw speed control 10rpm-150rpm；The second-order screw extruder is single screw extrusion machine, draw ratio
20-50, screw diameter 50-120, control screw speed 10-120rpm.
The advantageous effects of the present invention：
(1) high desulfurization degree reclaimed rubber is prepared using twin-screw, cost is cheap, can efficiently control traditional scrap rubber again
Caused waste water, waste gas etc. " secondary pollution " during life, the scrap rubber environment-friendly type regeneration belonged to truly utilize.
(2) high desulfurization degree reclaimed rubber, after desulfurization regeneration, for sol content more than 80%, its desulfurization degree is very high, molten
The distribution of glue moieties amount is very wide, is gathered substantially with almost linear macromolecular of the Sol molecular weight more than 10,000 and the small molecule less than 10,000
Compound forms, meanwhile, without the gel section of complete desulfurization, its cross-linked structure also by different degrees of destruction, remains part
The characteristic of crosslinking condition and the flexibility of linear molecule.This macromolecule compositions are better than occurring with crosslinking condition with the attached effect of wrapping up in gathered materials
Rubber powder, to lifted asphalt adhesiveness have valuable help, can then improve the water stability of asphalt.Its
In small molecule fragrance based composition and use thereof in packaging and rubber cracking oil collective effect, improve high temperature coal-tar pitch black brittleness so that
Modified high temperature coal-tar modified pitch is more suitable for road paving materials.
(3) high temperature coal-tar pitch is crisp by the comprehensively modifying of the oily and high desulfurization degree reclaimed rubber of rubber cracking, its low temperature
Property is greatly improved (15 DEG C of ductilities are substantially improved), and hot mastication point and uninfluenced.It is modified after comprehensively modifying
The component of high temperature coal-tar pitch is closer to asphalt, and compared to high temperature coal-tar pitch, it is particularly suited for ground surface material.
Mixing, disperseing through single screw rod again, modified high temperature coal-tar pitch can greatly wrap up in it is attached, permeate in masterbatch particles component it
Between, applied to ground surface material, asphalt content can be effectively reduced, saves financial cost.
(4) the linear macromolecule polymer in high desulfurization degree reclaimed rubber and the gel structure and plastics phase of micro- cross-linked structure
Interaction, rubber and plastic Grafting Structure is formed, then formed with high temperature toughness, the ground surface material of low temperature flexibility, improve pitch mixing
The high temperature performance of material.
(5) high desulfurization degree reclaimed rubber, its is apparent very glutinous, and Mooney viscosity is very low, is not easy to store, transports, PE or PP
After a small amount of incorporation mixing granulation of skeletal support agent, can solve this problem, the toughness of plastics can be played, to thick height
Desulfurization degree reclaimed rubber provides support, meanwhile, by the kneading of screw element, mixing, plastics can be formed with high desulfurization degree rubber
Moiety, grafting, the high temperature of asphalt can either be ensured with the thermoplastic structure being stabilized, this structure by being formed
Performance, while crack resistance at low-temperature and elasticity can also be improved.It is easy to packaging, storage and the transport of high desulfurization degree reclaimed rubber.
(6) direct putting type high-adhesiveness asphalt mixed material modifier has high-adhesiveness and water stability；High temperature toughness, low temperature
It is flexible.Can be direct plungeed into compound mix, rapidly dissolve, be uniformly dispersed in stone surface, and will not because of high temperature and
Cause fire incident.
The direct putting type high-adhesiveness asphalt mixed material modifier that the present invention uses prepares rubber cracking using supercritical toluene
Oil, aromatic radical small molecule and 20% or so the alkene-alkane that key component is more than 80%, the aromatic radical of high content is small among these
Molecule is similar with fragrant part component and glial component in pitch.High temperature coal-tar pitch, be characterized in high temperature easily trickle, low temperature
It is crisp.In low temperature, the component such as naphthalene therein easily separates out, and causes its black brittleness.Passing through the preliminary modified of rubber cracking oil,
Fragrant part content increase therein, reduces the degree of naphthalene precipitation, then improves the black brittleness energy of high temperature coal-tar pitch, make
It is particularly suited for ground surface material.Meanwhile industrial chemicals is prepared using waste Crumb rubber cracking, it can alleviate to a certain extent useless
The problem that tire recycles.
Cause rubber powder material increased resident time in machine barrel using the big screw slenderness ratio of double screw extruder, in height
Under temperature, high shear forces, the rubber powder of crosslinking condition can sufficiently be degraded, cracked, and prepare high desulfurization degree reclaimed rubber.Further
Improve modified high temperature coal-tar pitch by the modifying function of high desulfurization degree reclaimed rubber so that high desulfurization degree reclaimed rubber is uniform
It is dispersed in modified high temperature coal-tar pitch, while improves the high temperature performance of the modification high temperature coal-tar asphalt mixture.
PP/PE class skeletal support agent is finally mixed, uniformly mixing, the kneading in Single screw extrusion, plastics form micro- grafting with rubber and tied
Structure, formed with high temperature toughness, the direct putting type high-adhesiveness asphalt mixed material modifier of low temperature flexibility.
The present invention is changed using high desulfurization degree reclaimed rubber with the compound direct putting type cracks with high viscous asphalt compound for preparing of related auxiliaries
Property agent, prepare modifying agent especially by the proportioning and complex process that adjust high desulfurization degree reclaimed rubber and each related auxiliaries,
Aim to solve the problem that the problems of the prior art.By adjusting modifying agent, matrix pitch and the proportioning gathered materials, optimal ground surface material is obtained
The asphalt optimum process proportioning of performance.The direct putting type high-adhesiveness asphalt of preparation, solves traditional dry method
Incident flue gas is big during cooking for rubber-asphalt mixture, fire-hazardous shortcoming, saves and traditional first prepares modifying agent
The energy resource consumption that modified pitch, again mix cook.
Embodiment
For a clearer understanding of the present invention, it will be described in detail by specific embodiment.
The direct putting type high-adhesiveness asphalt mixed material modifier of following examples and the asphalt using the modifying agent
Preparation method comprise the following steps：
By waste Crumb rubber, softening oil, activator according to weight ratio：100：(3-20)：(0.3-4) in homogenizer
50-100 DEG C of pretreatment 10-30min, is dosed to the first rank screw extruder, preferably double screw extruder, controls double spiral shells
Bar difference zone temperatures are at 150-350 DEG C.Preferably, first paragraph：150-200 DEG C, second segment：250-300℃；3rd section：
300-350℃；4th section：300-350℃；5th section：150-200℃.By adjusting along left-hand thread element and kneading block
Combined hybrid pressurization make material pressure in 8-20MPa.Screw speed is controlled in 10rpm-150rpm, preferably 20-70rpm.Instead
High desulfurization degree reclaimed rubber is continuously extruded from mouth mold after answering 5-20min.
Then, high desulfurization degree reclaimed rubber enters second-order screw extruder, second-order screw rod by connector metering
The preferred single screw extrusion machine of extruder.Skeletal support agent by the metered different proportion of hopper and modified high temperature coal tar simultaneously
The homogeneous mixture of oil asphalt, control extruder cylinder of single screw extruder temperature is at 100-170 DEG C, preferably 100-150 DEG C, controls screw rod
Rotating speed 10-120rpm, to ensure uniformly mixing, preferably screw speed is 30-80rpm.Uniformly after extrusion, it is granulated and makes by water cooling
Standby direct putting type high-adhesiveness asphalt mixed material modifier.
It will gather materials and be heated to 160-190 DEG C, direct putting type high-adhesiveness pitch mixing of the input aggregate quality than 0.3-0.9%
Expect modifying agent, the dry mixing 5-20 seconds, matrix pitch is then heated to 150-180 DEG C, matrix drip of the input aggregate quality than 3-7%
Green grass or young crops, the mix 60-200 seconds, two-sided Beat numbers, obtain direct putting type high-adhesiveness asphalt.
The preparation of wherein modified high temperature coal-tar pitch need to be through two steps.First by 5-20 mesh waste Crumb rubber and toluene
According to mass ratio 1：(5-12) puts into reactor, controls 3-5 DEG C/minute of heating rate by thermocouple, is warming up to 350-400 DEG C,
Pressure 4.5-9MPa, supercritical toluene atmosphere is formed, pyrolysis time 30-120min is stirred in supercritical toluene atmosphere.Reaction
After pressure release discharge, collect toluene.Pyrolysis product is naturally cooling to room temperature.Take out cracking product and stand 15-30h, separate
Obtain yellow rubber cracking fluid body.It is formed：Aromatic hydrocarbon：82-93%, molecular weight：300-2000；Alkene-alkane：7-18%,
Molecular weight≤300.
Then high temperature coal-tar pitch is heated to 130-180 DEG C, to flow regime, adds 5-20%, on preferably 10%
Rubber cracking oil is stated, 10-30min is stirred with 100-300 revs/min of speed, using high-speed shearing emulsion machine with 10000-30000
Rev/min speed shearing 20-50min prepare modified high temperature coal-tar pitch.Needle penetration：65-90, softening point：51-59 DEG C, 15
DEG C ductility >=85cm.
The waste Crumb rubber of high desulfurization degree reclaimed rubber and rubber cracking oil preparation is the full tire meridian glue rubber powder of 5 purposes,
Can be car tire, hand cart tyre, conveyer belt rubber powder.Softening oil be environment-friendly type pine tar or tall oil, naphthenic oil,
One kind in rosin, aromatic naphtha.Activator is 420 or 450,480 or Diphenyl disulfide, benzenethiol, octadecane
One or more of mixtures in base amine.
The skeletal support agent of high-adhesiveness asphalt mixed material modifier preparation is mass ratio：(10-30)：(70-90's)
20-60 mesh waste Crumb rubber and PE/PP or 20-60 mesh waste Crumb rubber and regeneration PE/PP mixtures, preferred mass ratio are 20：80.
In following examples, prepare asphalt experimentation and detection method according to《Highway engineering pitch and drip
Blue or green test mixture code》(JTG F40-2004) is carried out.Technological parameter therein is the maturation process process approved in the industry, is
Contrast the quality of the direct putting type high-adhesiveness asphalt mixed material modifier and traditional wet-process modified pitch of the present invention, technological parameter
Do not adjust.And because the above describes the preparation process of modifying agent in detail, procedure below is simple step.
Embodiment 1：
By rubber powder, softening oil, activator according to weight ratio：100：3：0.5 pre-processes in homogenizer at 70 DEG C
15min, First double screw extruder is dosed to, from the high desulfurization degree reclaimed rubber of die extrusion after clipped, reaction.With
Afterwards, high desulfurization degree reclaimed rubber enters second screw extruder by connector metering, while adjusts hopper feed speed
According to high desulfurization degree reclaimed rubber, modified high temperature coal-tar pitch, skeletal support agent mass ratio：50：40：10 add and uniformly mix
Close, extrusion, direct putting type high-adhesiveness asphalt mixed material modifier is prepared by water cooling granulation.
Embodiment 2：
By rubber powder, softening oil, activator according to weight ratio：100：5：0.3 pre-processes in homogenizer at 70 DEG C
15min, First double screw extruder is dosed to, from the high desulfurization degree reclaimed rubber of die extrusion after clipped, reaction.With
Afterwards, high desulfurization degree reclaimed rubber enters second screw extruder by connector metering, while adjusts hopper feed speed
According to high desulfurization degree reclaimed rubber, modified high temperature coal-tar pitch, skeletal support agent mass ratio：50：45：5 add and uniformly mix
Close, extrusion, direct putting type high-adhesiveness asphalt mixed material modifier is prepared by water cooling granulation.
Embodiment 3：
By rubber powder, softening oil, activator according to weight ratio：100：8：2 pre-process in homogenizer at 70 DEG C
15min, First double screw extruder is dosed to, from the high desulfurization degree reclaimed rubber of die extrusion after clipped, reaction.With
Afterwards, high desulfurization degree reclaimed rubber enters second screw extruder by connector metering, while adjusts hopper feed speed
According to high desulfurization degree reclaimed rubber, modified high temperature coal-tar pitch, skeletal support agent mass ratio：50：35：15 add and uniformly mix
Close, extrusion, direct putting type high-adhesiveness asphalt mixed material modifier is prepared by water cooling granulation.
Embodiment 4：
By rubber powder, softening oil, activator according to weight ratio：100：10：0.8 pre-processes in homogenizer at 70 DEG C
15min, First double screw extruder is dosed to, from the high desulfurization degree reclaimed rubber of die extrusion after clipped, reaction.With
Afterwards, high desulfurization degree reclaimed rubber enters second screw extruder by connector metering, while adjusts hopper feed speed
According to high desulfurization degree reclaimed rubber, modified high temperature coal-tar pitch, skeletal support agent mass ratio：40：50：10 add and uniformly mix
Close, extrusion, direct putting type high-adhesiveness asphalt mixed material modifier is prepared by water cooling granulation.
Embodiment 5：
By rubber powder, softening oil, activator according to weight ratio：100：15：4 pre-process in homogenizer at 70 DEG C
15min, First double screw extruder is dosed to, from the high desulfurization degree reclaimed rubber of die extrusion after clipped, reaction.With
Afterwards, high desulfurization degree reclaimed rubber enters second screw extruder by connector metering, while adjusts hopper feed speed
According to high desulfurization degree reclaimed rubber, modified high temperature coal-tar pitch, skeletal support agent mass ratio：40：40：20 add and uniformly mix
Close, extrusion, direct putting type high-adhesiveness asphalt mixed material modifier is prepared by water cooling granulation.
Embodiment 6：
By rubber powder, softening oil, activator according to weight ratio：100：20：3 pre-process in homogenizer at 70 DEG C
15min, First double screw extruder is dosed to, from the high desulfurization degree reclaimed rubber of die extrusion after clipped, reaction.With
Afterwards, high desulfurization degree reclaimed rubber enters second screw extruder by connector metering, while adjusts hopper feed speed
According to high desulfurization degree reclaimed rubber, modified high temperature coal-tar pitch, skeletal support agent mass ratio：30：50：20 add and uniformly mix
Close, extrusion, direct putting type high-adhesiveness asphalt mixed material modifier is prepared by water cooling granulation.
Embodiment 7：
It will gather materials and be heated to 160-180 DEG C, matrix pitch is then heated to 165-170 DEG C, and put into aggregate quality ratio
4.5% matrix pitch, mix 120 seconds, two-sided Beat numbers, obtain asphalt, numbering 1#.
Embodiment 8：
It will gather materials and be heated to 160-180 DEG C, and put into 40 mesh waste Crumb rubbers of the aggregate quality than 0.4%, dry mixing 8 seconds, then
Matrix pitch is heated to 165-170 DEG C, puts into matrix pitch of the aggregate quality than 4.5%, mix 120 seconds, it is two-sided hit it is real into
Type, obtain dry method asphalt, numbering 2#.
Embodiment 9：
It will gather materials and be heated to 160-180 DEG C, the high adhesion of direct putting type prepared by embodiment 1 of the input aggregate quality than 0.4%
Property asphalt mixed material modifier, matrix pitch is then heated to 165-170 DEG C by dry mixing 8 seconds, and input aggregate quality is than 4.5%
Matrix pitch, mix 120 seconds, two-sided Beat numbers, obtain modified asphalt mixture, numbering 3#.
Embodiment 10：
It will gather materials and be heated to 160-180 DEG C, the high adhesion of direct putting type prepared by embodiment 2 of the input aggregate quality than 0.3%
Property asphalt mixed material modifier, matrix pitch is then heated to 165-170 DEG C by dry mixing 8 seconds, and input aggregate quality is than 4.5%
Matrix pitch, mix 120 seconds, two-sided Beat numbers, obtain modified asphalt mixture, numbering 4#.
Embodiment 11：
It will gather materials and be heated to 160-180 DEG C, the high adhesion of direct putting type prepared by embodiment 3 of the input aggregate quality than 0.6%
Property asphalt mixed material modifier, matrix pitch is then heated to 165-170 DEG C by dry mixing 8 seconds, and input aggregate quality is than 4.5%
Matrix pitch, mix 120 seconds, two-sided Beat numbers, obtain modified asphalt mixture, numbering 5#.
Embodiment 12：
It will gather materials and be heated to 160-180 DEG C, the high adhesion of direct putting type prepared by embodiment 4 of the input aggregate quality than 0.9%
Property asphalt mixed material modifier, matrix pitch is then heated to 165-170 DEG C by dry mixing 8 seconds, and input aggregate quality is than 4.5%
Matrix pitch, mix 120 seconds, two-sided Beat numbers, obtain modified asphalt mixture, numbering 6#.
Embodiment 13：
It will gather materials and be heated to 160-180 DEG C, the high adhesion of direct putting type prepared by embodiment 5 of the input aggregate quality than 0.8%
Property asphalt mixed material modifier, matrix pitch is then heated to 165-170 DEG C by dry mixing 8 seconds, and input aggregate quality is than 4.5%
Matrix pitch, mix 120 seconds, two-sided Beat numbers, obtain modified asphalt mixture, numbering 7#.
Embodiment 14：
It will gather materials and be heated to 160-180 DEG C, the high adhesion of direct putting type prepared by embodiment 6 of the input aggregate quality than 0.4%
Property asphalt mixed material modifier, matrix pitch is then heated to 165-170 DEG C by dry mixing 8 seconds, and input aggregate quality is than 4.5%
Matrix pitch, mix 120 seconds, two-sided Beat numbers, obtain modified asphalt mixture, numbering 8#.
In order to characterize the performance of direct putting type high-adhesiveness asphalt mixed material modifier made from embodiment 1-6, and with tradition
Dry method modification pitch contrast, respectively will using its preparation asphalt carry out performance test, referring specifically to table 1- tables 4.
The Marshall assay volume index of table 1.
The water stability of table 2. is tested
It can be seen that from Tables 1 and 2, prepared using the direct putting type high-adhesiveness asphalt mixed material modifier in embodiment 1-6
Asphalt, water resistant stability will be substantially better than the asphalt 1# for being not added with this modifying agent, and the drip of traditional dry method
Blue or green compound 2#, it is already possible to reach even better than wet method rubber powder modified asphalt compound and SBS modified asphalt mixtures.
The rut dynamic stability index test result of table 3.
| Embodiment | Dynamic stability (mm/ times) | Numbering |
| 7 | 1200 | 1# |
| 8 | 2100 | 2# |
| 9 | 3200 | 3# |
| 10 | 2450 | 4# |
| 11 | 4840 | 5# |
| 12 | 4900 | 6# |
| 13 | 5100 | 7# |
| 14 | 3600 | 8# |
The low-temperature bending failure strain test index of table 4.
| Embodiment | Low-temperature bending failure strain (μ ε) | Numbering |
| 7 | 2163 | 1# |
| 8 | 2532 | 2# |
| 9 | 2635 | 3# |
| 10 | 2597 | 4# |
| 11 | 3124 | 5# |
| 12 | 3241 | 6# |
| 13 | 3321 | 7# |
| 14 | 2813 | 8# |
From table 3 it can be seen that prepared using the direct putting type high-adhesiveness asphalt mixed material modifier in the present embodiment 1-6
Modified asphalt mixture, high temperature anti-rut behavior is equally better than the asphalt for being not added with this modifying agent.From table 4, it can be seen that
In terms of cryogenic property, the cryogenic property of modified asphalt mixture of the present invention will be higher by 40% or so, reach wet method rubber powder modified
Asphalt and SBS modified asphalt mixtures peer index.In addition, this auxiliary agent asphalt solves tradition in mix
Easily the catching fire of dry method rubber powder asphalt, the problem of flue gas is big, simultaneously as wrap up in attached property enhancing between pitch and building stones,
Its isolation problem is further improved.
Described above is only the preferred embodiment of the present invention, it is noted that for the common skill of the art
For art personnel, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, such as adjust modifying agent
Preparation technology parameter, these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (10)
- A kind of 1. asphalt using direct putting type high-adhesiveness modifying agent, it is characterised in that by mass ratio be 100：3-7： The gathering materials of 0.3-0.9, matrix pitch and direct putting type high-adhesiveness asphalt mixed material modifier mix：Wherein described direct putting type high-adhesiveness asphalt mixed material modifier is 30-50 by mass ratio：30-50：5-20 high desulfurization Degree reclaimed rubber, modified high temperature coal-tar pitch and skeletal support agent are made by stirring extrusion；The high desulfurization degree reclaimed rubber is 100 by mass ratio：3-20：0.3-4 waste Crumb rubber, softening oil and activator passes through Stirring extrusion is made；The modified high temperature coal-tar pitch is that the rubber cracking that mass fraction is 5-20% is added in high temperature coal-tar pitch Oil is made, and the rubber cracking oil is by waste Crumb rubber that mass fraction is 1 part in the supercritical toluene that mass fraction is 5-12 parts Cracking reaction is made under atmosphere；The skeletal support agent is 10-30 by mass ratio：70-90 20-60 mesh waste Crumb rubber mixes with one kind in PE or PP Close and be made.
- 2. asphalt according to claim 1, it is characterised in that the waste Crumb rubber is damaged tire, useless conveyer belt, given up One or more in rubber overshoes；The softening oil is one kind in pine tar, naphthenic oil, tall oil, aromatic naphtha, rosin；It is described Activator is phenyl disulfide, benzenethiol, polyalkylbenzene phenol disulphide, one kind or mixture in octadecylamine.
- 3. asphalt according to claim 1 or claim 2, it is characterised in that the sol content of the high desulfurization degree reclaimed rubber More than 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) it is more than 5.
- 4. asphalt according to claim 1, it is characterised in that the modified high temperature coal-tar pitch is by mass ratio 5-20：100 rubber cracking oil and the shearing of high temperature coal-tar asphalt mixing are made, and the high temperature coal-tar pitch is through high-temperature coal Solid residue obtained by tar distillation.
- 5. according to the asphalt of claim 1 or 4, it is characterised in that the rubber cracking oil, which forms, is：Molecular weight is The mass ratio of 300-2000 aromatic hydrocarbon and alkene-alkane of molecular weight≤300, the aromatic hydrocarbon and alkene-alkane is 82-93：7- 18。
- 6. asphalt according to claim 5, it is characterised in that the softening point 60-80 of the high temperature coal-tar pitch DEG C, toluene insolubles content 10-20%, quinoline insolubles content 0.2-2.5%, moisture are less than 4%；The modified high temperature coal tar The needle penetration of oil asphalt：65-90, softening point：51-59 DEG C, 15 DEG C of ductility >=85cm.
- A kind of 7. system of asphalt using direct putting type high-adhesiveness modifying agent according to claim any one of 1-6 Preparation Method, it is characterised in that comprise the steps：By 5-20 mesh waste Crumb rubber and toluene according to mass ratio 1：5-12 puts into reactor, and heating forms supercritical toluene atmosphere, Cooling is collected pyrolysis product and stood, isolated yellow rubber cracking fluid body after cracking reaction 30-120min；High temperature coal-tar pitch is heated to 130-180 DEG C to flow regime, adds the rubber that mass fraction is 5-20% Cracked oil, stirring, shearing prepare modified high temperature coal-tar pitch；By the waste Crumb rubber, softening oil, activator according to mass ratio 100：3-20：0.3-4 pre-processes 10- at 50-100 DEG C 30min, the first rank screw extruder is dosed to, controlling different zone temperatures, material pressure is in 8- at 150-350 DEG C High desulfurization degree reclaimed rubber is continuously extruded after 20MPa, stirring reaction 5-20min from mouth mold；It is 30-50 by mass ratio：30-50：The 5-20 high desulfurization degree reclaimed rubber, modified high temperature coal-tar pitch and skeleton Proppant is added separately to second-order screw extruder, controls 100-170 DEG C of barrel zone temperature, barrel pressure 5-15MPa, stirring is Even extrusion, granulation prepare direct putting type high-adhesiveness asphalt mixed material modifier；It will gather materials and be heated to 160-190 DEG C, and put into the asphalt mixed material modifier of the aggregate quality than 0.3-0.9, dry mixing 5- 20 seconds, then put into 150-180 DEG C matrix pitch of the aggregate quality than 3-7, mix 60-200 seconds, two-sided Beat numbers.
- 8. preparation method according to claim 7, it is characterised in that temperature is 350-400 in the supercritical toluene atmosphere DEG C, pressure 4.5-9MPa, heating rate is 3-5 DEG C/minute.
- 9. preparation method according to claim 7, it is characterised in that 10-30min is stirred with 100-300 revs/min of speed The high temperature coal-tar pitch and rubber cracking oil mixture, using high-speed shearing emulsion machine with 10000-30000 revs/min of speed Mixture described in rate shearing 20-50min obtains the modified high temperature coal-tar pitch.
- 10. preparation method according to claim 7, it is characterised in that the first rank screw extruder is that cocurrent and parallel is double Screw extruder, draw ratio 50-100, screw diameter 50-120, screw speed control 10rpm-150rpm；The second-order spiral shell Bar extruder is single screw extrusion machine, draw ratio 20-50, screw diameter 50-120, controls screw speed 10-120rpm.
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| CN107476159A (en) * | 2017-08-04 | 2017-12-15 | 云南云岭高速公路建设集团有限公司 | Deliver directly method modified SBS asphalt pavement construction engineering method |
| CN109575613A (en) * | 2018-10-31 | 2019-04-05 | 佛山市光烨环保科技有限公司 | A method of asphalt modifier is prepared using useless lubricating grease, gear oil and coal tar |
| CN111607239B (en) * | 2019-02-26 | 2022-08-16 | 北京路德永泰环保科技有限公司 | Cold-patch rubber asphalt mixed solution and preparation method thereof |
| CN111606602B (en) * | 2019-02-26 | 2022-07-15 | 北京路德永泰环保科技有限公司 | Cold-patch rubber asphalt mixture and preparation method thereof |
| CN110204912B (en) * | 2019-06-24 | 2024-02-09 | 黑龙江省公路科学研究院 | Method for improving low-temperature crack resistance of Russian petroleum asphalt |
| CN111518403B (en) * | 2020-05-12 | 2022-05-13 | 张超 | Direct-vat-set quick-melt asphalt mixture composite modifier particles and preparation method thereof |
| CN111925659A (en) * | 2020-07-30 | 2020-11-13 | 江苏宝利国际投资股份有限公司 | Self-healing modified asphalt and preparation method and application thereof |
| CN112266522B (en) * | 2020-10-30 | 2023-10-20 | 长安大学 | Direct-casting type waste plastic asphalt modifier and preparation method thereof |
| CN112551940A (en) * | 2020-12-10 | 2021-03-26 | 辽宁省交通科学研究院有限责任公司 | Direct-vat-set tackifying regenerative modifier and preparation and application methods 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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| CN101979440A (en) * | 2010-10-18 | 2011-02-23 | 无锡市同义路面新材料有限公司 | Asphalt modifier 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 |
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| CN102702601A (en) * | 2012-06-04 | 2012-10-03 | 深圳市科中大交通建材有限公司 | Direct addition type rubber powder composite asphalt mixture modifier and preparation method thereof |
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