CN106587705A - SMA asphalt concrete modifier and preparation method thereof - Google Patents
SMA asphalt concrete modifier and preparation method thereof Download PDFInfo
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- CN106587705A CN106587705A CN201611191745.6A CN201611191745A CN106587705A CN 106587705 A CN106587705 A CN 106587705A CN 201611191745 A CN201611191745 A CN 201611191745A CN 106587705 A CN106587705 A CN 106587705A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/26—Bituminous materials, e.g. tar, pitch
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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Abstract
The invention discloses an SMA asphalt concrete modifier and a preparation method thereof, and relates to the field of road engineering materials. The SMA asphalt concrete modifier comprises a modifier basic material composed of an SBS modifier, a cosolvent and a solubilizer, lignin fibers, a crosslinking agent and an accelerator. The preparation method comprises the steps: mixing the SBS modifier, cosolvent and solubilizer at high temperature to obtain the uniformly mixed modifier basic material; carrying out primary cooling treatment on the modified asphalt basic material, adding the lignin fibers and stirring to obtain the modifier basic material mixed with the lignin fibers; carrying out secondary cooling treatment on the modifier basic material mixed with the lignin fibers, adding the crosslinking agent and accelerator, and after uniformly mixing, granulating to obtain the SMA asphalt concrete modifier. The modifier prepared according to the preparation method can be directly added on site, solves the problems of segregation in storage and property attenuation of SBS modified asphalt, and also solves the construction deficiency of ununiform dispersion of added fibers and probable appearance of oil stain.
Description
Technical field
The present invention relates to road engineering material field, more particularly to a kind of agent of SMA bituminous concretes comprehensively modifying and its system
Standby bituminous concrete.
Background technology
With the development of economy and society, for the construction quality of road engineering requires increasingly to improve, bitumastic is broken
Stone compound (SMA) is widely used with its excellent anti-rut behavior and antiskid performance, is had become at present high
One of first-selected ground surface material of level highway construction.
SMA is a kind of bitumastic filling being made up of asphalt binder, fiber stabilizer, breeze and a small amount of fine aggregate
The coarse aggregate skeleton gap of gap grading and the asphalt that constitutes.
In SMA mixture, the quality of asphalt binder must is fulfilled for the needs of bitumastic, i.e., with higher viscosity
With excellent high temperature performance, SBS modified pitch is commonly used at present.Current SBS modified pitch typically takes wet method to be obtained, i.e., in advance
Method in factory by SBS modifier with matrix pitch through swelling, shearing, development prepares finished product SBS modified pitch, and this is not only
Extra transport and production link are increased, and finished product SBS modified pitch belongs to thermodynamic unstable system, in storage transport
During the problems such as different degrees of modifying agent isolation layering, beacon decay will necessarily occur, for being difficult modified Colophonium, this
Plant decay especially notable.After general SBS modified pitch dispatches from the factory, averagely will be through the transport of 2 days or so and storage, in case of overcast and rainy
Gas or other administration changes lead to not construction, and the resting period is likely to be breached more than 5 days, and the performance of modified pitch refers to during this period
Mark has occurred and that deep fades, or even cannot meet engine request, causes series of problems to pavement quality.Therefore often at present
Made by wet method, SBS modified pitch not only increases production cost, causes environmental pollution, reduces construction motility,
Return pavement quality and bring harmful effect.
Fiber stabilizer is that SMA mixture has to use for material, and reinforcement, dispersion, stable, increasing can be played to compound
Viscous to wait effect, research shows, with the addition of fiber, dispersing and analysing leakage for bituminous concrete is obviously improved.Lignocellulose is
The organic fiber that natural timber is obtained through chemical treatment, is the most frequently used fiber stabilizers of SMA, and current lignin fibre is divided into
Cotton-shaped and two kinds of graininess.Cotton-shaped lignin fibre easily becomes damp and rotten during storage, while in adition process easily
Generation is floated, it is therefore necessary to which plastics package good whole bag fiber is direct plungeed into mixing building use, and plastics package during mix is heated
Melt, fiber is gathered materials and is distributed in compound, but cannot so ensure fiber mix homogeneously, therefore the road surface of making holds
Easily there are the phenomenons such as oil mark, and the plastics packed cryogenic property added to compound brings adverse effect.Using granule
During fiber, during pelletize, lignocellulose heating properties are damaged, it is impossible to which performance should have effect, in addition in of short duration mix
Between fiber in endoparticle be difficult to be uniformly dispersed, cause the waste of material.Therefore how effectively to add lignin fibre is
Reasonable employment SMA bituminous concrete urgent problems.
There are direct putting type SBS modification technologies in SMA bituminous mixtures field at present, and obtained in entity project
To application, but in technical difficult (i.e. SBS modifier needs hot pelletize, lignin fibre to need cold pelletize), SBS is modified
Agent is difficult to common melt pelletization with two kinds of materials of lignin fibre.Produce SMA in the case, lignin fibre still need with
The form of cotton-shaped or granule is thrown in respectively with SBS modifier, this not only adds execute-in-place intensity, and two kinds of admixtures
In the uniformly dispersed reduction for mixing and stirring the short time in pot, unstability is caused to affect to the performance indications of compound, therefore urgently
Need a kind of succinct effectively method disposably to solve the problems, such as additional modifying agent, realize fiber and the modified bi-materials of SBS
Simple and stable input, dispersed, the SMA asphalts of production high-quality.
The content of the invention
Common melt pelletization is difficult to two kinds of materials of lignin fibre in order to solve SBS modifier present in prior art
Technical problem, the present invention provides a kind of SMA mixture modifying agent and preparation method thereof, and utilizes SMA mixture modifying agent
The SMA mixture of preparation.
In order to realize the purpose of the present invention, first aspect present invention provides a kind of SMA asphalt concrete modifying agents, and which can be
Job site directly throw in mix use, it is not necessary to carry out it is swelling, shearing and development process, its by：
Modifying agent with SBS modifier, cosolvent, solubilizing agent as constituent is expected substantially；
Lignin fibre；And
Cross-linking agent and accelerator are prepared from.
Wherein, the modifying agent expects also to include cosolvent substantially.
Wherein, the weight of the SBS modifier, solubilizing agent, lignin fibre, cross-linking agent, accelerator, cosolvent
For：
Preferably, the SBS modifier, solubilizing agent, lignin fibre, cross-linking agent, accelerator, the weight portion of cosolvent are matched somebody with somebody
Than for：
Wherein, the SBS modifier is one kind of linear or star-like styrene butadiene styrene block copolymer (SBS)
Or compounding.
Preferred but be not limited to, the melt index of the SBS modifier is more than 2g/10min.
Wherein, the solubilizing agent is Colophonium, FCC slurry, furfural extract oil, naphthenic oil, the side line of atmospheric and vacuum distillation of petroleum
Oil, waste used oil, the one kind or compounding for reclaiming waste oil.The addition of solubilizing agent can play pre-swollen effect to SBS modifier,
On the one hand SBS modifier prilling temperature can be reduced in pelletize, on the other hand can promotes in use to crosslink
Reaction.
Wherein, the cosolvent is ethylene-vinyl acetate copolymer (abbreviation EVA).
Wherein, the vinyl acetate content in the cosolvent is 15%-28%, and melt index is more than 15g/10min.
EVA has excellent pliability and elasticity, is affected its melt index of a relatively high by its molecular structure, is passed through
The addition of EVA can improve the melt index of modifying agent, can not only reduce prilling temperature, can also promote SBS with Colophonium
It is compatible, when the SBS modifier of 6g/10min is more than from melt index, can be without cosolvent.
Wherein, the cross-linking agent is sulfur.
Wherein, the sulfur can be powder, lamellar or liquid condition.
Wherein, the accelerator is zinc-ethylphenyl dithiocarbamate, zinc dibenzyl dithiocarbamate, two sulfur
Change one or more in tetra-benzyl thiram, stearic acid, benzoyl peroxide and Zinc Oxide, through the accelerator of proportion optimizing
The generation of modifying agent cross-linking reaction, promotion can be promoted to form stable network structure.
To realize the purpose of the present invention, second aspect present invention provides a kind of method of the modifying agent for preparing first aspect,
Comprise the following steps：
SBS modifier, solubilizing agent are mixed at high temperature, the modifying agent being uniformly mixed is expected substantially；
The modified pitch is expected to carry out after the first cooling process substantially, lignin fibre is added, is stirred, is mixed
The modifying agent for having lignin fibre is expected substantially；
The modifying agent for being mixed with lignin fibre is expected to carry out after the second cooling process substantially, cross-linking agent and promotion is added
Agent, after mix homogeneously, pelletize obtains SMA asphalt concrete modifying agents.
Wherein, pelletize mode can be being realized using modes such as screw rods.
Wherein, the temperature for being mixed under the high temperature be 64-192 DEG C, preferably 80-160 DEG C, more preferably
96-128℃。
Wherein, when a length of 5min-60min, the preferably 10-50min for being mixed under the high temperature, more preferably
20min-30min。
In above-mentioned time and temperature parameter, if high temperature mixing temperature is too high, lignin fibre will receive heat ageing, its property
Matter will change；If high temperature mixing temperature is too low, SBS modifier is difficult to pre-swollen and disperses, and affects modified effect.During mixing
Between it is long, lignin fibre, SBS modifier and solubilizing agent equally can occur aging reaction in the presence of oxygen, affect performance
Normal performance；Incorporation time deficiency can cause the uniformity coefficient of pre-swollen and mixing, therefore invention through lot of experiments, find
Disclosure satisfy that
The modified combination of cellulose fiber and dry method SBS.
Wherein, the SBS modifier with the mass parts ratio of solubilizing agent is：SBS modifier 15-40：Solubilizing agent 20-55.
Wherein, the SBS modifier is one kind of linear or star-like styrene butadiene styrene block copolymer (SBS)
Or compounding, it is preferably but not limited to SBS modifier of the melt index more than 2g/10min.
Wherein, the solubilizing agent is Colophonium, FCC slurry, furfural extract oil, naphthenic oil, the side line of atmospheric and vacuum distillation of petroleum
Oil, waste used oil, the one kind or compounding for reclaiming waste oil.
Particularly, it is described first cooling treatment temperature be 36-120 DEG C, preferably 45-100 DEG C, more preferably 54-
80℃。
Wherein, the weight that the lignin fibre is expected substantially with the modified pitch is：Lignin fibre 15-
40：SBS modifier 15-40：Solubilizing agent 20-55.
Wherein, the lignin fibre can be present for cotton-shaped or graininess.
Particularly, it is described second cooling treatment temperature be 12-60 DEG C, preferably 15-50 DEG C, more preferably 18-40
℃。
Wherein, the proportion by weight of the cross-linking agent and accelerator and the SMA asphalt concrete modifying agents, i.e. cross-linking agent
With proportion by weight of the accelerator with lignin fibre, SBS modifier, solubilizing agent it is：Cross-linking agent 0.2-2：Accelerator 0.2-2：
SBS modifier 15-40：Lignin fibre 15-40：Solubilizing agent 20-55.
Wherein, the cross-linking agent is sulfur, can be existed for powder, lamellar or liquid form.
Sulfur and rubber after heat, can produce very active double-basis sulfur altogether, and it is Thiolation that it generates rubber with rubber reaction
Compound, is then changed into polysulfide crosslink bond, and this polysulfide crosslink bond can occur addition, cyclization, and then form crosslinked
System promotes the crosslinking of SBS.
Wherein, the accelerator is zinc-ethylphenyl dithiocarbamate, zinc dibenzyl dithiocarbamate, two sulfur
Change one or more in tetra-benzyl thiram, stearic acid, benzoyl peroxide and Zinc Oxide, through the accelerator of proportion optimizing
The generation of modifying agent cross-linking reaction can be promoted, promote SBS to form stable network structure.
Particularly, cosolvent can also be added during the modifying agent is expected substantially.
Wherein, the cosolvent is ethylene-vinyl acetate copolymer (EVA),
Preferably, the vinyl acetate content in the cosolvent is 15%-28%, and melt index is more than 15g/10min.
EVA has excellent pliability and elasticity, as the characteristics of molecular structure, its melt index is of a relatively high, not only can
Prilling temperature is reduced enough, additionally it is possible to promote SBS compatible with Colophonium.
Particularly, cosolvent with the weight of SBS modifier, solubilizing agent is：Cosolvent 0-15:SBS modifier 15-
40:Solubilizing agent 20-55.
The present invention expects to reduce the prilling temperature of SBS modifier as modifying agent using solubilizing agent and SBS modifier substantially,
And processed using cooling twice, it is achieved thereby that the low temperature pelletize of lignin fibre, it is to avoid fine during application heating prilling
Dimension cannot after granulator granulation performance loss problem, also solve lignocellulose easily floating, mixing in adition process
The technical problem of uneven, measuring difficulties.
For the purpose for being embodied as inventing, a kind of modifying agent preparation SMA Colophoniumes of first aspect of third aspect present invention offer
The method of concrete, including：
To be gathered materials with the modifying agent described in first aspect the dry mixing 20s-50s under dry mixing temperature conditionss, obtain mixing equal
The even mixture gathered materials with modifying agent；
Matrix pitch is added in mixture, is continued mix 50s-100s, is obtained asphalt mixture；
Breeze is added in asphalt mixture, is continued mix 50s-100s, is obtained SMA bituminous concretes.
Wherein, 0.4%-2% of the modifying agent addition for aggregate quality；The addition of the matrix pitch is collection
The 3.2%-7.2% of material quality；2.4%-15% of the addition of the breeze for aggregate quality.
Preferably, 0.6%-1.5% of the modifying agent addition for aggregate quality；The addition of the matrix pitch
For the 4%-6% of aggregate quality；3%-15% of the addition of the breeze for aggregate quality.
It is further preferred that 3%-7% of the addition of the breeze for aggregate quality.
Particularly, the dry mixing temperature is 170 DEG C -200 DEG C.
When the modifying agent using the application carries out mix, SBS is melted rapidly and is sent out in the presence of cross-linking agent, accelerator
Raw cross-linking reaction, reaches modified purpose, i.e., matrix pitch is converted into SBS modified pitch during mix, can be notable
Improve high-temperature behavior, cryogenic property and the anti-fatigue performance of SMA mixture；Lignin fibre is uniformly dispersed simultaneously, to compound
The effect such as reinforcement, dispersion, stable, thickening is played, the caking property and high-temperature behavior of SMA mixture is significantly improved, while wooden fibre
Additions of dimension element can also be played a part of anti-disperse, prevent analysis from leaking.
The present invention has the advantages that：
1st, as the application has used solubilizing agent, cosolvent, thus the prilling temperature of SBS modifier is reduced, and is passed through
The method that two-stage cooling is processed, realizes the SBS modifier and the wood for needing cold pelletize of the hot pelletize of needs for being difficult to common melting
The common pelletize of quality fiber, the dry method SBS modified addition with lignin fibre is united two into one, preparation SMA coagulations are solved
Lignocellulose is added in the process of soil to be susceptible to float, mix uneven technical problem, while producing in compound
During avoid because of various granules while the problem for adding the construction organization that causes difficult.
2nd, there is lignin fibre composition in the SMA asphalt concrete modifying agents that the application is provided, thus with obtained in which
SMA bituminous concretes are dispersed, prevent the effects such as strong, the increase high-temperature behavior of analysis leakage, caking property with anti-.And in mix process
In, there is Quick cross-linking reaction in scattered SBS modifier in advance in the presence of cross-linking agent, accelerator, significantly improve SMA coagulations
The high temperature cryogenic property and anti-fatigue ability of soil.
3rd, as the SMA asphalt concrete modifying agents that the application is provided can be used for dry process SMA bituminous concretes, therefore
During using it for dry process SMA bituminous concretes, production link and the scene behaviour of finished product SBS modified pitch are reduced
Make intensity, reduce disposal of pollutants, effectively reduce use cost.
4th, as SBS bituminous concretes obtained in the application directly can be carried out at the construction field (site), reduce wet method preparation
The storage of the finished product SBS modified pitch during SBS modified pitch and transit link, therefore occur in avoiding storage transport
The quality problems such as isolation layering, performance indications decay.
5th, comprehensively modifying agent of the present invention can deposit more than 1 year, it is to avoid finished product SBS modified pitch is in construction
The storage at scene, improves construction motility, is particularly well-suited to the southern area of many now rainy weathers.
The present invention makes the materials'use management of SMA mixture production become very simple：Unit in charge of construction's buying plain asphalt,
Production by throwing in this modifying agent at the scene obtains function admirable and stable SMA mixture.The modified drips of SBS are there is no concern that again
Blue or green storage isolation and performance degradation problem, also thoroughly solve fiber input disperse construction that is uneven, that oil mark easily occur
Defect.
Specific embodiment
Experimental technique used in following embodiments if no special instructions, is conventional method.
In following embodiments, material used, reagent etc., if no special instructions, commercially obtain.
It will be appreciated by those skilled in the art that below specifically described content be illustrative rather than it is restricted, should not be with
This limits the scope of the invention.
Preparation of embodiment 1-6 for SMA asphalt concrete modifying agents.
Embodiment 1
1st, get the raw materials ready
Each composition is weighed according to following weight ratio,
Wherein SBS is line style 791H for originating from Yueyang petrochemical industry.Lignocellulose is cotton-shaped, originates from German JRS companies.Solubilising
Agent is to originate from furfural extract oil that the naphthene base crude line that subtracts three of middle extra large Colophonium obtained through furfural treatment and originate from middle extra large Colophonium
Naphthenic oil according to 1:The mixture of 1 ratio.Cosolvent be originate from Yanshan Petrochemical vinyl acetate content be 19%, melt index
For the EVA of 16g/10min.Cross-linking agent is the powder-sulphur of content 99.5%, originates from Maoming Petrochemical.Accelerator is commercially available Zinc Oxide
With commercially available zinc dibenzyl dithiocarbamate according to 1:The mixture of 1 ratio.
2nd, the preparation of SMA asphalt concrete modifying agents
SBS powders are uniformly mixed 5min with cosolvent, solubilizing agent under the conditions of 80 DEG C by 2.1, and now, SBS powders are being helped
It is uniformly dispersed in solvent and solubilizing agent, pre-swollen reaction occurs, the first mixture is obtained.
First mixture is cooled to 45 DEG C by 2.2, is added lignin fibre, is stirred, and now lignocellulose is equal
Even is dispersed in the first mixture, obtains the second mixture.
Above-mentioned second mixture is continued to be cooled to 15 DEG C by 2.3, is contained after adding cross-linking agent, accelerator mix homogeneously
Cross-linking agent but the 3rd mixture of reaction is not crosslinked, the 3rd mixture is added in extruder, pelletize obtains granular
SMA asphalt concrete modifying agents.
Wherein, agitator reaches the stirring speed dispersion machine of Chemical Manufacture using Jiangyin City's essence, and extruder is using purchased from Qinghe County
The single screw rod cold feed rubber machine of elite machine die factory.
Embodiment 2
1st, get the raw materials ready
Each composition is weighed according to following weight ratio,
Wherein SBS is originate from Yueyang petrochemical industry star-like 4303.Lignocellulose is cotton-shaped, originates from German JRS companies.Solubilising
Agent is to originate from the naphthene base crude line that subtracts three of middle extra large Colophonium through furfural extract oil and 110# Colophoniumes according to 1:The mixing of 1 ratio
Thing.Cosolvent be originate from Yanshan Petrochemical vinyl acetate content be 16%, melt index be 19g/10min EVA.Cross-linking agent is
The powder-sulphur of content 99.5%, originates from Maoming Petrochemical.Accelerator is commercially available Zinc Oxide：Zinc dibenzyl dithiocarbamate：
Stearic acid is according to 3:1:The mixture of 1 ratio.
2nd, the preparation of SMA asphalt concrete modifying agents
SBS powders are uniformly mixed 40min with cosolvent, solubilizing agent under the conditions of 160 DEG C by 2.1, and now, SBS powders exist
It is uniformly dispersed in cosolvent and solubilizing agent, pre-swollen reaction occurs, the first mixture is obtained.
First mixture is cooled to 95 DEG C by 2.2, is added lignin fibre, is stirred, and now lignocellulose is equal
Even is dispersed in the first mixture, obtains the second mixture.
Above-mentioned second mixture is continued to be cooled to 45 DEG C by 2.3, is contained after adding cross-linking agent, accelerator mix homogeneously
Cross-linking agent but the 3rd mixture of reaction is not crosslinked, the 3rd mixture is added in extruder, pelletize obtains granular
SMA asphalt concrete modifying agents.
Wherein, agitator reaches the stirring speed dispersion machine of Chemical Manufacture using Jiangyin City's essence, and extruder is using purchased from Qinghe County
The single screw rod cold feed rubber machine of elite machine die factory.
Embodiment 3
1st, get the raw materials ready
Each composition is weighed according to following weight ratio：
Wherein SBS be originate from line style 791H of Yueyang petrochemical industry with star-like 4303 according to 1:1 ratio mixes.Lignocellulose is
It is cotton-shaped, originate from German JRS companies.Solubilizing agent is to originate from the 200# Colophoniumes of middle extra large Colophonium and naphthenic oil according to 1:The mixing of 1 ratio
Thing.Cosolvent be originate from du pont company vinyl acetate content be 28%, melt index be 400g/10min EVA.Hand over
Connection agent is the Molten sulphur of content 99.5%, originates from Maoming Petrochemical.Accelerator is commercially available Zinc Oxide：Ethylphenyl dithiocarbamates
Zinc formate：Stearic acid is according to 3:1:The mixture of 1 ratio.
2nd, the preparation of SMA asphalt concrete modifying agents
SBS powders are uniformly mixed 30min with cosolvent, solubilizing agent under the conditions of 130 DEG C by 2.1, and now, SBS powders exist
It is uniformly dispersed in cosolvent and solubilizing agent, pre-swollen reaction occurs, the first mixture is obtained.
First mixture is cooled to 75 DEG C by 2.2, is added lignin fibre, is stirred, and now lignocellulose is equal
Even is dispersed in the first mixture, obtains the second mixture.
Above-mentioned second mixture is continued to be cooled to 35 DEG C by 2.3, is contained after adding cross-linking agent, accelerator mix homogeneously
Cross-linking agent but the 3rd mixture of reaction is not crosslinked, the 3rd mixture is added in extruder, pelletize obtains granular
SMA asphalt concrete modifying agents.
Wherein, agitator reaches the stirring speed dispersion machine of Chemical Manufacture using Jiangyin City's essence, and extruder is using purchased from Qinghe County
The single screw rod cold feed rubber machine of elite machine die factory.
Embodiment 4
1st, get the raw materials ready
Each composition is weighed according to following weight ratio：
Lee length honor 1487 of the wherein SBS for line style, its melt index are 12.Lignocellulose is graininess, originates from Germany
JRS companies.Solubilizing agent is to reclaim waste used oil and naphthenic oil according to 1:The mixture of 1 ratio.Cosolvent without.Cross-linking agent is
The powder-sulphur of content 99.5%, originates from Maoming Petrochemical.Accelerator is commercially available Zinc Oxide and zinc dibenzyl dithiocarbamate
According to 1:The mixture of 1 ratio.
2nd, the preparation of SMA asphalt concrete modifying agents
SBS powders are uniformly mixed 5min with cosolvent, solubilizing agent under the conditions of 80 DEG C by 2.1, and now, SBS powders are being helped
It is uniformly dispersed in solvent and solubilizing agent, pre-swollen reaction occurs, the first mixture is obtained.
First mixture is cooled to 45 DEG C by 2.2, is added lignin fibre, is stirred, and now lignocellulose is equal
Even is dispersed in the first mixture, obtains the second mixture.
Above-mentioned second mixture is continued to be cooled to 15 DEG C by 2.3, is contained after adding cross-linking agent, accelerator mix homogeneously
Cross-linking agent but the 3rd mixture of reaction is not crosslinked, the 3rd mixture is added in extruder, pelletize obtains granular
SMA asphalt concrete modifying agents.
Wherein, agitator reaches the stirring speed dispersion machine of Chemical Manufacture using Jiangyin City's essence, and extruder is using purchased from Qinghe County
The single screw rod cold feed rubber machine of elite machine die factory.
Embodiment 5
1st, get the raw materials ready
Each composition is weighed according to following weight ratio：
Wherein SBS is originate from Yueyang petrochemical industry star-like 4303.Lignocellulose is graininess, originates from German JRS companies.Increase
Solvent is to originate from the FCC slurry of Daxie petrochemical industry with the 110# Colophoniumes for originating from middle extra large Colophonium according to 1:The mixture of 1 ratio.Cosolvent
Vinyl acetate content to originate from Yanshan Petrochemical is the EVA that 16%, melt index is 19g/10min.Cross-linking agent is content
99.5% powder-sulphur, originates from Maoming Petrochemical.Accelerator is commercially available Zinc Oxide：Zinc dibenzyl dithiocarbamate：Hard Fat
Acid is according to 3:1:The mixture of 1 ratio.
2nd, the preparation of SMA asphalt concrete modifying agents
SBS powders are uniformly mixed 55min with cosolvent, solubilizing agent under the conditions of 160 DEG C by 2.1, and now, SBS powders exist
It is uniformly dispersed in cosolvent and solubilizing agent, pre-swollen reaction occurs, the first mixture is obtained.
First mixture is cooled to 95 DEG C by 2.2, is added lignin fibre, is stirred, and now lignocellulose is equal
Even is dispersed in the first mixture, obtains the second mixture.
Above-mentioned second mixture is continued to be cooled to 45 DEG C by 2.3, is contained after adding cross-linking agent, accelerator mix homogeneously
Cross-linking agent but the 3rd mixture of reaction is not crosslinked, the 3rd mixture is added in extruder, pelletize obtains granular
SMA asphalt concrete modifying agents.
Wherein, agitator reaches the stirring speed dispersion machine of Chemical Manufacture using Jiangyin City's essence, and extruder is using purchased from Qinghe County
The single screw rod cold feed rubber machine of elite machine die factory.
Embodiment 6
1st, get the raw materials ready
Each composition is weighed according to following weight ratio：
Wherein SBS be originate from line style 791H of Yueyang petrochemical industry with star-like 4303 according to 1:1 ratio mixes.Lignocellulose is
It is cotton-shaped, originate from German JRS companies.Solubilizing agent is recovery waste oil：Naphthenic oil is according to 1:The mixture of 1 ratio.Cosolvent is product
Vinyl acetate content from sinopec Yanshan Petrochemical is the EVA that 16%, melt index is 19g/10min.Cross-linking agent is content
99.5% Molten sulphur, originates from Maoming Petrochemical.Accelerator is commercially available Zinc Oxide：Tetra-benzyl thiram disulfide：Benzoyl peroxide
Formyl：Stearic acid is according to 3:1:1:1 scalemic thereof.
2nd, the preparation of SMA asphalt concrete modifying agents
SBS powders are uniformly mixed 20min with cosolvent, solubilizing agent under the conditions of 130 DEG C by 2.1, and now, SBS powders exist
It is uniformly dispersed in cosolvent and solubilizing agent, pre-swollen reaction occurs, the first mixture is obtained.
First mixture is cooled to 75 DEG C by 2.2, is added lignin fibre, is stirred, and now lignocellulose is equal
Even is dispersed in the first mixture, obtains the second mixture.
Above-mentioned second mixture is continued to be cooled to 35 DEG C by 2.3, is contained after adding cross-linking agent, accelerator mix homogeneously
Cross-linking agent but the 3rd mixture of reaction is not crosslinked, the 3rd mixture is added in extruder, pelletize obtains granular
SMA asphalt concrete modifying agents.
Wherein, agitator reaches the stirring speed dispersion machine of Chemical Manufacture using Jiangyin City's essence, and extruder is using purchased from Qinghe County
The single screw rod cold feed rubber machine of elite machine die factory.
The SMA asphalt concrete modifying agents prepared in embodiment 1-6 are carried out into performance measurement, testing result is as shown in table 1.
Wherein melt index tester model RZ-400B, the production of Shenzhen Zun Xiang Science and Technology Ltd.s, MELTING POINT TESTER type
Number be WRS-1B, Shanghai Precision Scientific Apparatus Co., Ltd production.
1 modifying agent performance indications testing result of table
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Embodiment 6 | |
| Fusing point (DEG C) | 123 | 142 | 127 | 121 | 138 | 120 |
| Melt index (g/10min) | 10 | 4 | 8 | 11 | 4.5 | 12 |
| The dispersibility in asphalt | Melt completely | Melt completely | Melt completely | Melt completely | Melt completely | Melt completely |
As can be seen from Table 2, modifying agent by the solid state transformed temperature for liquid only up to 142, it is minimum reach 120, root
Understand that fusing point is more high, it is required that the temperature of mix process is higher, and vice versa according to common knowledge, therefore be modified obtained in the application
Agent temperature is relatively low, and mix requires low.Melt index has reacted the processing fluidity of modifying agent, and melt index obtained in the application is most
Height can reach 12g/10min, minimum to reach 4g/min, can be melted in Colophonium.It can be seen that, the prepared modifying agent of the present invention can
To substitute modifying agent used in prior art.
SMA concrete prepared by comprehensively modifying agent prepared by 7 Application Example 1-6 of embodiment
1st, will gather materials with above-mentioned comprehensively modifying agent mix temperature be 170 DEG C -200 DEG C under the conditions of dry mixing 20s-50s, wherein
The usage amount of comprehensively modifying agent is the 1%-2% of aggregate quality, obtains mixture.
2nd, in mixture matrix pitch, 4%-6% of the addition for aggregate quality percentage ratio is added to continue mix 50s-
100s, is made matrix pitch be crosslinked with mixture, obtains cross-linking products.
3rd, in cross-linking products, the breeze of the 3%-15% of aggregate quality, mix 50s-100s is added to mix which, finally
Under conditions of 165 DEG C of temperature carry out hitting reality, obtain SMA concrete.
Wherein, the parameter of the concrete for being prepared using embodiment 1-6 is according to following table control：
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Embodiment 6 | |
| Mix temperature (DEG C) | 175 | 195 | 185 | 180 | 193 | 170 |
| Modifying agent ratio (%) | 1 | 1 | 2 | 2 | 1.5 | 1.5 |
| Breeze ratio (%) | 3 | 7 | 13 | 10 | 5 | 4 |
| Duration of mixing 1 (s) | 30 | 40 | 20 | 30 | 40 | 50 |
| Duration of mixing 2 (s) | 100 | 50 | 60 | 80 | 95 | 100 |
| Duration of mixing 3 (s) | 50 | 100 | 80 | 70 | 50 | 40 |
Compare for convenience, by existing two kinds of technical schemes as a comparison case.
Comparative example 1
It is modified with the finished product SBS that the modifier content for originating from Qinhuangdao petrochina fuel Colophonium Co., Ltd is 5%
Colophonium, the cotton-shaped lignin fibre for originating from multiple JRS companies are raw material, prepare SMA modified asphalt concretes, and bitumen aggregate ratio is according to analysis
Leakage and dispersion test determine that bitumen aggregate ratio is 5% in this example, lignin fibre addition for compound gross mass 5%.
Comparative example 2
To originate from the matrix pitch of Qinhuangdao petrochina fuel Colophonium Co., Ltd, Road paving technology is originated from limited
The dry method of company delivers directly SBS-T modifying agent, and the cotton-shaped lignin fibre for originating from German JRS companies is raw material, prepares the modified drips of SMA
Blue or green concrete, according to leakage and dispersion test determination is analysed, in this example, bitumen aggregate ratio is effective SBS contents in 5.5%, SBS-T to bitumen aggregate ratio
The 5% of asphalt quality is accounted for, lignin fibre addition is the 0.3% of compound gross mass, and lignin fibre is independent in mix
Throw in, be designated as comparative example 2.
Concrete prepared by concrete prepared by embodiment 1-6 and comparative example is according to JTG F40-2004《Highway asphalt
Pavement construction technical specification》Performance measurement is carried out, measurement result is as shown in table 2：
2 SMA concrete performance index testing results of table
From data in table 2, in embodiment 1-6, indices meet technical requirements, and are prepared using the application
The degree of stability of concrete be up to 14.5, minimum 9.5, be above the degree of stability of comparative example；Residual stability highest
96.8, minimum 92.2 have been reached, the degree of stability of comparative example has been above；Especially freeze-thaw split strength ratio is more than 90%,
97% is up to, and the performance of comparative example is 90%；7590 times/the mm additionally, dynamic stability is up to known clearly, be
More than the twice of comparative example 2, it is seen then that prepare concrete using the modifying agent of the application and play really reinforcement, dispersion, stable, increasing
It is viscous to wait effect, and better than two comparative examples for taking prior art, therefore the needs realized by the modifying agent of the application preparation
The lignocellulose of cold pelletize is thoroughly mixed with the SBS's for needing hot pelletize, does not make the performance impairment of lignocellulose, instead
And enhance the effect that modifying agent is prepared to concrete.
Obviously, the above embodiment of the present invention is only intended to clearly illustrate example of the present invention, and is not right
The restriction of embodiments of the present invention, for those of ordinary skill in the field, may be used also on the basis of the above description
To make other changes in different forms, all of embodiment cannot be exhaustive here.It is every to belong to this
Bright technical scheme it is extended obvious change or change still in protection scope of the present invention row.
Claims (10)
1. a kind of SMA asphalt concrete modifying agents, it is characterised in which can directly throw in mix use at the construction field (site), be not required to
Carry out swelling, shearing and development is processed, its composition includes：
Modifying agent with SBS modifier, cosolvent, solubilizing agent as constituent is expected substantially；
Lignin fibre；And
Cross-linking agent and accelerator.
2. SMA asphalt concrete modifying agents as claimed in claim 1, it is characterised in that the SBS modifier, cosolvent, increasing
Solvent expects to be mixed SBS modifier, cosolvent, solubilizing agent at 80-160 DEG C for the modifying agent of constituent substantially,
The modifying agent being uniformly mixed is expected substantially.
3. SMA asphalt concrete modifying agents as claimed in claim 1, it is characterised in that by weight, the SBS are modified
Agent, solubilizing agent, lignin fibre, cross-linking agent, accelerator, the proportioning of cosolvent are：
4. modifying agent as claimed in claim 3, it is characterised in that the lignin fibre is to expect substantially to carry out by modifying agent
One cooling is added after processing.
5. modifying agent as claimed in claim 4, it is characterised in that the SMA asphalt concrete modifying agents be will be mixed with it is wooden
After the modifying agent of cellulose fiber expects to carry out the second cooling process substantially, cross-linking agent and accelerator are added, after mix homogeneously, pelletize is obtained
Arrive.
6. a kind of method of the modifying agent prepared described in claim 1, it is characterised in that comprise the following steps：
SBS modifier, cosolvent, solubilizing agent are mixed at high temperature, the modifying agent being uniformly mixed is expected substantially；
The modified pitch is expected to carry out after the first cooling process substantially, lignin fibre is added, is stirred, obtains being mixed with wood
The modifying agent of quality fiber is expected substantially；
The modifying agent for being mixed with lignin fibre is expected to carry out after the second cooling process substantially, cross-linking agent and accelerator is added,
After mix homogeneously, pelletize obtains SMA asphalt concrete modifying agents.
7. preparation method as claimed in claim 6, it is characterised in that the first cooling treatment temperature is 45 DEG C -100 DEG C；
The second cooling treatment temperature is 15 DEG C -50 DEG C.
8. the method that the modifying agent described in a kind of utilization claim 1 prepares SMA bituminous concretes, it is characterised in that include：
To be gathered materials with the modifying agent described in claim 1 dry mixing 20s-50s, the collection being uniformly mixed under dry mixing temperature conditionss
The mixture of material and modifying agent；
Matrix pitch is added in mixture, is continued mix 50s-100s, is obtained asphalt mixture；
Breeze is added in asphalt mixture, is continued mix 50s-100s, is obtained SMA bituminous concretes.
9. the method for as claimed in claim 8 preparing SMA bituminous concretes, it is characterised in that the modifying agent addition is
The 0.4%-2% of aggregate quality；3.2%-7.2% of the addition of the matrix pitch for aggregate quality；The breeze
2.4%-15% of the addition for aggregate quality.
10. the method for preparing SMA bituminous concretes as claimed in claim 9, it is characterised in that the dry mixing temperature is 170
℃-200℃。
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Effective date of registration: 20200413 Address after: 100083 Beijing City, Haidian District Xueyuan Road No. 30, large industrial building 4 storey block A room 06 Co-patentee after: SHANDONG HI-SPEED TECHNOLOGY DEVELOPMENT GROUP Co.,Ltd. Patentee after: Guolu Tech (Beijing) Engineering Technology Research Institute Co.,Ltd. Co-patentee after: SHANDONG EXPRESSWAY NEW MATERIAL TECHNOLOGY Co.,Ltd. Co-patentee after: National Highway Technological Communications Technology Co.,Ltd. Co-patentee after: Henan Guolu new tech Mstar Technology Ltd. Address before: 100083 Beijing City, Haidian District Xueyuan Road No. 30, large industrial building 4 storey block A room 06 Co-patentee before: National Highway Technological Communications Technology Co.,Ltd. Patentee before: Guolu Tech (Beijing) Engineering Technology Research Institute Co.,Ltd. Co-patentee before: Henan Guolu new tech Mstar Technology Ltd. |