CN103509356A - Asphalt mixture modified material and preparation method thereof - Google Patents
Asphalt mixture modified material and preparation method thereof Download PDFInfo
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- CN103509356A CN103509356A CN201310430878.4A CN201310430878A CN103509356A CN 103509356 A CN103509356 A CN 103509356A CN 201310430878 A CN201310430878 A CN 201310430878A CN 103509356 A CN103509356 A CN 103509356A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/141—Feedstock
- Y02P20/143—Feedstock the feedstock being recycled material, e.g. plastics
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
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- Y02W30/62—Plastics recycling; Rubber recycling
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Abstract
The invention relates to an asphalt mixture modified material which comprises the following components in parts by weight: 150-200 parts of polyethylene, 60-90 parts of styrene-butadiene-styrene block copolymer, 16-30 parts of polyethylene terephthalate, 50-80 parts of polyvinyl butyral and 20-40 parts of a filling agent. The asphalt mixture modified material can effectively improve the pavement performance of asphalt mixtures. In addition, the invention further provides a preparation method for the asphalt mixture modified material.
Description
Technical field
The present invention relates to building material field, relate in particular to a kind of asphalt material modified and preparation method thereof.
Background technology
Highway is each country's indispensable traffic route in each city, and the construction situation of motorway can reflect the traffic development degree of Yi Ge countries and regions and even the integral level of Economic development.Therefore, the performance of motorway has just become formidable problem.And pitch be a kind of can waterproof, protection against the tide and rot-resistant organic gel gel material, thereby be widely used in the construction of motorway.Yet traditional asphalt still exists the imperfect problem of pavement performance.
Summary of the invention
Given this, be necessary to provide a kind of asphalt material modified and preparation method thereof, can improve the pavement performance of asphalt.
A kind of asphalt is material modified, the component that comprises following mass fraction: polyethylene is 150～200 parts, styrene-butadiene-styrene block copolymer is 60～90 parts, polyethylene terephthalate is 16～30 parts, polyvinyl butyral acetal is 50～80 parts, and weighting agent is 20～40 parts.
In an embodiment, described styrene-butadiene-styrene block copolymer is line style styrene-butadiene-styrene block copolymer or star-like styrene-butadiene-styrene block copolymer therein; Described weighting agent is at least one in silica ashes, potter's clay, talcum, kaolin, flyash, silicon-dioxide, asbestos, wood powder and cellulose powder.
The preparation method that asphalt is material modified, comprises the steps:
Mass fraction according to following each component takes raw material: 20～40 parts of 150～200 parts of polyethylene, 60～90 parts of styrene-butadiene-styrene block copolymers, 16～30 parts of polyethylene terephthalates, 50～80 parts of polyvinyl butyral acetals and weighting agents;
Described polyethylene is mixed with described styrene-butadiene-styrene block copolymer, and melt pelletization, obtains the mangcorn of described polyethylene and described styrene-butadiene-styrene block copolymer; And
Described mangcorn is mixed with described polyethylene terephthalate, polyvinyl butyral acetal and weighting agent, melt extrude, obtain asphalt material modified.
In an embodiment, also comprise and from white garbage, extract described poly step therein, from described white garbage, extract described poly step and comprise: described white garbage is broken into fragment; Organic solvent is joined in described fragment, at 140 ℃～160 ℃, be stirred to dissolving, obtain containing poly organic solution, then add and the described peptizer containing quality such as poly organic solutions, continue to stir after 30 minutes～40 minutes, be cooled to 10 ℃～35 ℃, obtain mixture gel, described organic solvent is two or more mixed solution being mixed to form in toluene, dimethylbenzene, chloroform, naphthane and perhydronaphthalene; Then described mixture gel is pulverized, then organic solvent is removed in distillation, then cleans and filtering separation through adding water, obtains polyethylene.
In an embodiment, described peptizer is calcium sulfate, calcium carbonate, Calcium hydrogen carbonate, calcium phosphate or polyethylene therein.
In an embodiment, in an embodiment, the area of stating fragment is 0.01 square metre～0.04 square metre therein therein.
In an embodiment, the equipment that the mixed mixture melt pelletization of described polyethylene and described styrene-butadiene-styrene block copolymer adopts is single screw rod primary and secondary tablets press therein.
In an embodiment, the diameter of described mangcorn is 1 millimeter～4 millimeters therein, and length is 1 millimeter～10 millimeters.
In an embodiment, the equipment that described mangcorn and the mixed mixture of described polyethylene terephthalate, polyvinyl butyral acetal and weighting agent melt extrude employing is twin screw extruder therein.
In an embodiment, described styrene-butadiene-styrene block copolymer is line style styrene-butadiene-styrene block copolymer or star-like styrene-butadiene-styrene block copolymer therein; Described weighting agent is at least one in silica ashes, potter's clay, talcum, kaolin, flyash, silicon-dioxide, asbestos, wood powder and cellulose powder.
Due to the material modified polyethylene that comprises of above-mentioned asphalt, styrene-butadiene-styrene block copolymer, polyethylene terephthalate, polyvinyl butyral acetal, and weighting agent, thereby make that above-mentioned asphalt is material modified has a stronger modified function, as its elasticity and good toughness, in the larger area of the temperature difference, can embody well high temperature resistant, anti-low temperature ability etc., add asphalt to and can effectively improve heat-resisting freeze proof and anti-rut performance of asphalt etc., it is the material modified pavement performance that can effectively improve asphalt of above-mentioned asphalt.
Accompanying drawing explanation
Fig. 1 is the material modified preparation method's of the asphalt of an embodiment schema.
Embodiment
Mainly to asphalt is material modified and preparation method thereof, be described in further detail in conjunction with the drawings and the specific embodiments below.
The asphalt of one embodiment is material modified, the component that comprises following mass fraction: polyethylene is 150～200 parts, styrene-butadiene-styrene block copolymer is 60～90 parts, polyethylene terephthalate is 16～30 parts, 50～80 parts of polyvinyl butyral acetals, and weighting agent is 20～40 parts.
Polyethylene (PE) is a kind of thermoplastic resin that ethene makes through polymerization.Polyethylene has good resistance to low temperature, and chemical stability is good, the erosion of the most of soda acids of ability.
Styrene-butadiene-styrene block copolymer (SBS) can be line style styrene-butadiene-styrene block copolymer or star-like styrene-butadiene-styrene block copolymer.The viscosity of styrene-butadiene-styrene block copolymer (SBS) is large, and bonding strength is high.Styrene-butadiene-styrene block copolymer has good tensile strength, elasticity and electrical property, and tension set is little, and it is good to subdue with rebound resilience, and surface friction is large; Resistance to ozone, oxygen; Ventilation property is excellent; And the two keys that contain due to main chain make SBS ageing-resistant poor, and under the oxidizing condition of high temperature air, butadiene block can be cross-linked, thereby the hardness of making and viscosity increase.
Polyethylene terephthalate (PET) has good physical and mechanical properties in wide temperature range, life-time service temperature can reach 120 ℃, electrical insulating property is good, even, under high-temperature high-frequency, its electrical property is still better, but corona resistance is poor, creep resistance, resistance to fatigue, rub resistance and dimensional stability are all fine, and PET has ester bond, under strong acid, highly basic and water vapor acting, can decompose organic solvent-resistant, good weatherability.
Polyvinyl butyral acetal has good snappiness, agglutinating value(of coal) and winter hardiness.
Weighting agent can, for the conventional weighting agent in this area, be preferably wollastonite powder, potter's clay, talcum, kaolin, flyash, silicon-dioxide, asbestos, wood powder and cellulose powder.Silica ashes more preferably.Silica ashes has persistence, weathering resistance, as weighting agent, can strengthen expanding ability, reduces crackle, but also can reduce oil number, strengthens erosion resistance.
Due to the material modified polyethylene that comprises of above-mentioned asphalt, styrene-butadiene-styrene block copolymer, polyethylene terephthalate, polyvinyl butyral acetal, and weighting agent, thereby make that above-mentioned asphalt is material modified has a stronger modified function, as its elasticity and good toughness, in the larger area of the temperature difference, can embody well high temperature resistant, anti-low temperature ability etc., add asphalt to and can effectively improve heat-resisting freeze proof and anti-rut performance of asphalt etc., it is the material modified pavement performance that can effectively improve asphalt of above-mentioned asphalt.
As shown in Figure 1, the preparation method that the asphalt of an embodiment is material modified, comprises the steps:
Step S110: the mass fraction according to following each component takes raw material: 20～40 parts of 150～200 parts of polyethylene, 60～90 parts of styrene-butadiene-styrene block copolymers, 16～30 parts of polyethylene terephthalates, 50～80 parts of polyvinyl butyral acetals and weighting agents.
In specific embodiment, also comprise and from white garbage, extract poly step, from white garbage, extract poly step and comprise: white garbage is broken into fragment; Organic solvent is joined in fragment, at 140 ℃～160 ℃, be stirred to dissolving, obtain containing poly organic solution, then add and the peptizer that contains the quality such as poly organic solution, continue to stir after 30 minutes～40 minutes, be cooled to 10 ℃～35 ℃, obtain mixture gel, organic solvent is two or more mixed solution being mixed to form in toluene, dimethylbenzene, chloroform, naphthane and perhydronaphthalene; Then mixture gel is pulverized, then organic solvent is removed in distillation, then cleans and filtering separation through adding water, obtains polyethylene.
By before white garbage fragmentation, first reclaim and the white garbage of classifying, obtain polyethylene white garbage.Reclaim and the white garbage of classifying, by range estimation, just can simply complete and take the classification of polyethylene as the white garbage of main material.The white garbage that the polyethylene of take is main raw is generally that the light plastic that compost bag, refuse bag, supermarket use is packed, mulch film etc.
Preferably, the area of fragment is 0.01 square metre～0.04 square metre.The white garbage fragment of this size is conducive to it and is dissolved in organic solvent below.The device using while preferably, white garbage being broken into fragment is band water crusher.For example, the band water crusher that the model of the Qian Cheng of Zhangjagang City machine works is PC-600.Use band water crusher, make have water to participate in shattering process broken, with the particle of water, flow to rinse bath, through again rolling, can play white garbage fragment is rinsed to clean effect, be conducive to remove the mud on fragment.Before further fragment being dissolved in organic solvent, also comprise cleaning fragment, and the fragment after cleaning is carried out to drying treatment.In the present embodiment, white garbage fragment is sent in rinse bath and is cleaned by transport tape, thereby removes impurity and dirt settling in white garbage fragment, such as dust, silt etc.First white is broken into fragment, then cleans, be conducive to the removal of impurity and dirt settling.Fragment drying treatment after cleaning is that the method adopting can directly be dried for oven drying method, aeration drying or the sun.Preferably, the fragment after cleaning first dries with drier, then dries, thereby reaches brownout, put forward high-quality object.In fragment, sneak into the foreign material such as small stone, sand and weeds when drying, therefore, during solarization, will note Changes in weather and dust storm dust.
Under the condition of 140 ℃～150 ℃, directly peptizer is joined containing in poly organic solution, the steps such as saving can intercooling, pulverizing, have simplified operating process.
Organic solvent is two or more mixed solution being mixed to form in toluene, dimethylbenzene, chloroform, naphthane and perhydronaphthalene.Because the polyethylene in polyethylene white garbage has three kinds, respectively high density polyethylene(HDPE), Low Density Polyethylene and linear polyethylene, by by two kinds or two or more organic solvents mixes, can regulate to dissolve different melting points, different molecular weight or dissimilar polyethylene.
Preferably, organic solvent is the mixed solution that dimethylbenzene and chloroform are mixed to form; More preferably, the mass ratio of dimethylbenzene and chloroform is 4:1～2.By chloroform and dimethylbenzene are mixed to form to mixed solvent, chloroform wherein can play the effect that regulates boiling point, thereby reaches the effect that reduces energy consumption.
Preferably, organic solvent is the mixed solution that toluene and chloroform are mixed to form; Preferred, the volume ratio of toluene and chloroform is 1:1.
By organic solvent is joined in fragment and is dissolved, obtain containing poly organic solution, the peptizer of quality such as then add, can play effect stable and that solidify, make can to solidify rapidly containing poly organic solvent, form mixture gel.Preferably, peptizer can, for the conventional material that can play stable and solidification in this area, be preferably calcium sulfate, calcium carbonate, Calcium hydrogen carbonate, calcium phosphate or polyethylene.
The device using while preferably, fragment being added to stirring and dissolving in organic solvent is reactor.Because organic solvent has certain volatility, by carrying out in reactor, can keep stability, and dissolution process at high temperature carries out, can cause the volatilization of organic solution, cause organic solvent to reduce, make to dissolve insufficient, in reactor, carry out, can make to dissolve more abundant, more even, make solute effect better.Rotating speed when more preferably, fragment joins and stirs in organic solvent is 80 revs/min～90 revs/min; More preferably, adding the rotating speed while stirring with the inorganic salt continuation containing quality such as poly organic solutions is 100 revs/min.
By distillation, remove organic solvent, and the organism removed of distillation, can also recycle and reuse, thus effectively saved cost.When the peptizer adding is calcium sulfate, calcium carbonate, Calcium hydrogen carbonate or calcium phosphate, add water and clean calcium sulfate, calcium carbonate, Calcium hydrogen carbonate or the calcium phosphate that can remove precipitation, because polyethylene under normal temperature is crystalloid, its density ratio water is little, can float on the surface, and the density of calcium sulfate, calcium carbonate, Calcium hydrogen carbonate, calcium phosphate is all greater than the density of water, can precipitate.By adding water, clean, the underwater calcium sulfate of precipitation, calcium carbonate, Calcium hydrogen carbonate or calcium phosphate are removed, and then through adding water filtration separation, just can access polyethylene.When the peptizer adding is polyethylene, directly add water and clean and filtering separation, just can access polyethylene.
Preferably, after mixture gel is pulverized, distilled, also comprise the drying step of the filter residue obtaining after adding water cleaning, filtering separation successively.The condition of drying step is: 60 ℃～100 ℃ are dried 2 hours～8 hours.Further, the device that drying step is used is explosion-prevention water-bath baking oven.For example, the BHX series vertical explosion-prevention water-bath baking oven that Shanghai Bai Dun mechanical means company limited produces.By using explosion-prevention water-bath baking oven to heat water medium, more constantly spread uniformly in working spaces by the heat of water, it more can be dried uniformly.
Preferably, the device using during distillation is recirculated water steam distillation unit.For example, the recirculated water steam distillation unit that Hao Li bio tech ltd in Guangzhou produces.Because the organic solvent adding has volatility, by using recirculated water steam distillation unit organic solvent not to be destroyed, to stablize and indissoluble or water insoluble with wet distillation, and extract organic composition by this device in water.Make all right recycling of these organic compositions.
Because the impurity in the polyethylene extracting in white garbage is more, and further purification can largely increase the cost that white garbage reclaims, thereby cause the well reuse of polyethylene extracting from white garbage, by the polyethylene that white garbage is extracted, be used as the material modified raw material of asphalt, not only can solve the recycling problem of resource, thereby significantly reduce the material modified cost of asphalt, and the asphalt mixed material modifier preparing with this adds the pavement performance that can effectively improve bituminous pavement in asphalt to.
Wherein, styrene-butadiene-styrene block copolymer (SBS) can be line style styrene-butadiene-styrene block copolymer or star-like styrene-butadiene-styrene block copolymer.
Wherein, weighting agent can, for the conventional weighting agent in this area, be preferably silica ashes, potter's clay, talcum, kaolin, flyash, silicon-dioxide, asbestos, wood powder and cellulose powder.Silica ashes more preferably.Silica ashes has persistence, weathering resistance, can strengthen the expanding ability of asphalt as weighting agent, reduces crackle, but also can reduce oil number, strengthens erosion resistance.
Step S120: polyethylene is mixed with styrene-butadiene-styrene block copolymer (SBS), and melt pelletization, obtains the mangcorn of polyethylene and styrene-butadiene-styrene block copolymer.
Because styrene-butadiene-styrene block copolymer (SBS) is a kind of relatively material of indissoluble, by first by the mixed melting of polyethylene (PE) and styrene-butadiene-styrene block copolymer (SBS), thereby it can better be mixed with polyethylene terephthalate, polyvinyl butyral acetal and weighting agent.
In the present embodiment, the equipment that the mixed mixture melt pelletization of polyethylene and styrene-butadiene-styrene block copolymer adopts is single screw rod primary and secondary tablets press.Single screw rod primary and secondary tablets press has good melting effect, and temperature very easily controls, and use electric power little, and floor space is little.For example, single screw rod primary and secondary tablets press of the LXSJ-015 model of Guangzhou Lian Xin plastics machinery company limited.
Wherein, the diameter of mangcorn is 1 millimeter～4 millimeters, and length is 1 millimeter～10 millimeters.Thereby be conducive to evenly mix with polyethylene terephthalate, polyvinyl butyral acetal and weighting agent.
Step S130: mangcorn is mixed with polyethylene terephthalate, polyvinyl butyral acetal and weighting agent, melt extrude, obtain asphalt material modified.
Wherein, to melt extrude the equipment of employing be twin screw extruder for mangcorn and polyethylene terephthalate, the mixed mixture of polyvinyl butyral acetal weighting agent.For example, the MT65 parallel equidirectional two-screw forcing machine of Jiangsu Mei Zhilong Machinery Co., Ltd..
The preparation method that above-mentioned asphalt is material modified, simple to operate, and the material modified pavement performance that can effectively improve asphalt of the asphalt of preparing.
Be below specific embodiment part:
Embodiment 1
Material modified being prepared as follows of asphalt of the present embodiment:
(1) from white garbage, extract polyethylene: reclaim and the white garbage of classifying, by range estimation, find out polyethylene white garbage, then sent into band water crusher and carried out fragmentation, be chopped into the fragment that area is 0.01 ㎡, the fragment with water after chopping is sent into rinse bath by transport tape and is cleaned, through again rolling and clean, then the fragment of the polyethylene white garbage after cleaning is dried with drier, then dry.The fragment of getting 1000g polyethylene white garbage is placed in reactor, adds the mixing solutions of dimethylbenzene and chloroform, and wherein the volume ratio of dimethylbenzene and chloroform is 4:1, amounts to 5000g; Temperature of reaction kettle is adjusted to 150 ℃, and stirs and extremely dissolve for 40 minutes with 90 revs/min, obtain containing poly organic solution.Then from feed inlet, add and containing the sulfuric acid calcium powder of poly organic solution equivalent, and stir 30 minutes with 100 revs/min, be cooled to 10 ℃ to obtain mixture gel; This mixture gel is pulverized with pulverizer, be broken into powdery; Then this flour is distilled in recirculated water steam distillation unit, until remove dimethylbenzene and chloroform, cooling after, add water and clean, remove the calcium sulfate of precipitation, then through adding water filtration separation, the filter residue obtaining is placed in 60 ℃, explosion-prevention water-bath baking oven and is dried 8 hours, obtains polyethylene.Wherein, the poly purity that the present embodiment extracts is more than 90%.
(2) according to the mass fraction of following each component, take raw material: 35 parts of 200 parts of polyethylene, 60 parts of styrene-butadiene-styrene block copolymers, 18 parts of polyethylene terephthalates, 78 parts of polyvinyl butyral acetals and silica ashes.Wherein, polyethylene is the polyethylene extracting in step (1), and the poly content extracting according to step (1) takes according to poly umber in said components.
(3) polyethylene is mixed with styrene-butadiene-styrene block copolymer; adopt single screw rod primary and secondary tablets press melt pelletization, obtain the mangcorn of polyethylene and styrene-butadiene-styrene block copolymer, wherein; 1 millimeter of the diameter of mangcorn, length is 10 millimeters.
(4) above-mentioned mangcorn is mixed with polyethylene terephthalate, polyvinyl butyral acetal and wollastonite powder, adopt twin screw extruder to melt extrude, the asphalt that obtains the present embodiment is material modified.
According to quality, be 0.3%, the asphalt that the present embodiment is obtained is material modified, according to JTGF40-2004 industry standard, take No. 70 pitch adds in asphalt as matrix pitch, level is equipped with close-graded SMA-13, and the data that the pavement performance of the asphalt of the modification obtaining detects are in Table 1.
Embodiment 2
Material modified being prepared as follows of asphalt of the present embodiment:
(1) from white garbage, extract polyethylene: reclaim and the white garbage of classifying, by range estimation, find out polyethylene white garbage, then sent into band water crusher and carried out fragmentation, be chopped into the fragment that area is 0.04 ㎡, the fragment with water after chopping is sent into rinse bath by transport tape and is cleaned, through again rolling and clean, then the fragment of the polyethylene white garbage after cleaning is dried with drier, then dry.The fragment of getting 1000g polyethylene white garbage is placed in reactor, adds the mixing solutions of toluene and chloroform, and wherein the volume ratio of toluene and chloroform is 1:1, amounts to 5000g; Temperature of reaction kettle is adjusted to 140 ℃, and stirs and to dissolving, obtain containing poly organic solution for 45 minutes with 85 revs/min.Then from feed inlet, add and containing the Paris white of poly organic solution equivalent, and stir 40 minutes with 100 revs/min, be cooled to 35 ℃ to obtain mixture gel; This mixture gel is pulverized with pulverizer, be broken into powdery; Then this flour is distilled in recirculated water steam distillation unit, until remove toluene and chloroform, cooling after, add water and clean, remove the calcium carbonate of precipitation, then add water filtration separation, the filter residue obtaining is placed in 100 ℃, explosion-prevention water-bath baking oven and is dried 2 hours, obtains polyethylene.Wherein, the poly purity that the present embodiment extracts is more than 90%.
(2) according to the mass fraction of following each component, take raw material: 12 parts, 160 parts of polyethylene, 70 parts of styrene-butadiene-styrene block copolymers, 20 parts of polyethylene terephthalates, 65 parts of polyvinyl butyral acetals, 18 parts of wollastonite powder and potter's clay.Wherein, polyethylene is the polyethylene extracting in step (1), and the poly content extracting according to step (1) takes according to poly umber in said components.
(3) polyethylene is mixed with styrene-butadiene-styrene block copolymer; adopt single screw rod primary and secondary tablets press melt pelletization, obtain the mangcorn of polyethylene and styrene-butadiene-styrene block copolymer, wherein; 4 millimeters of the diameters of mangcorn, length is 1 millimeter.
(4) above-mentioned mangcorn is mixed with polyethylene terephthalate, polyvinyl butyral acetal, wollastonite powder and potter's clay, adopt twin screw extruder to melt extrude, the asphalt that obtains the present embodiment is material modified.
According to quality, be 0.4%, the asphalt that the present embodiment is obtained is material modified, according to JTGF40-2004 industry standard, take No. 70 pitch adds in asphalt as matrix pitch, level is equipped with close-graded SMA-13, and the data that the pavement performance of the asphalt of the modification obtaining detects are in Table 1.
Embodiment 3
Material modified being prepared as follows of asphalt of the present embodiment:
(1) from white garbage, extract polyethylene: reclaim and the white garbage of classifying, by range estimation, find out polyethylene white garbage, then sent into band water crusher and carried out fragmentation, be chopped into the fragment that area is 0.02 ㎡, the fragment with water after chopping is sent into rinse bath by transport tape and is cleaned, through again rolling and clean, then the fragment of the polyethylene white garbage after cleaning is dried with drier, then dry.The fragment of getting 1000g polyethylene white garbage is placed in reactor, adds the mixing solutions of toluene, chloroform and naphthane, and wherein, the volume ratio of toluene, chloroform and naphthane is 4:2:1, amounts to 5000g; Temperature of reaction kettle is adjusted to 160 ℃, and stirs and extremely dissolve for 45 minutes with 85 revs/min, obtain containing poly organic solution.Then from feed inlet, add and containing the polyethylene powders of poly organic solution equivalent, and stir 30 minutes with 100 revs/min, be cooled to 20 ℃ to obtain mixture gel; This mixture gel is pulverized with pulverizer, be broken into powdery; Then this flour is distilled in recirculated water steam distillation unit, until remove toluene, chloroform and naphthane, cooling after, then add water filtration separation, the filter residue obtaining is placed in 80 ℃, explosion-prevention water-bath baking oven dry 6 hours, obtains polyethylene.Wherein, the poly purity that the present embodiment extracts is more than 90%.
(2) according to the mass fraction of following each component, take raw material: 12 parts, 180 parts of polyethylene, 75 parts of styrene-butadiene-styrene block copolymers, 30 parts of polyethylene terephthalates, 80 parts of polyvinyl butyral acetals, 10 parts, talcum, 18 parts of kaolin and flyash.Wherein, polyethylene is the polyethylene extracting in step (1), and the poly content extracting according to step (1) takes according to poly umber in said components.
(3) polyethylene is mixed with styrene-butadiene-styrene block copolymer; adopt single screw rod primary and secondary tablets press melt pelletization, obtain the mangcorn of polyethylene and styrene-butadiene-styrene block copolymer, wherein; 4 millimeters of the diameters of mangcorn, length is 1 millimeter.
(4) above-mentioned mangcorn is mixed with polyethylene terephthalate, polyvinyl butyral acetal, talcum, kaolin and flyash, adopt twin screw extruder to melt extrude, the asphalt that obtains the present embodiment is material modified.
According to quality, be 0.5%, the asphalt that the present embodiment is obtained is material modified, according to JTGF40-2004 industry standard, take No. 70 pitch adds in asphalt as matrix pitch, level is equipped with close-graded SMA-13, and the data that the pavement performance of the asphalt of the modification obtaining detects are in Table 1.
Embodiment 4
Material modified being prepared as follows of asphalt of the present embodiment:
(1) from white garbage, extract polyethylene: reclaim and the white garbage of classifying, by range estimation, find out polyethylene white garbage, then sent into band water crusher and carried out fragmentation, be chopped into the fragment that area is 0.03 ㎡, the fragment with water after chopping is sent into rinse bath by transport tape and is cleaned, through again rolling and clean, then the fragment of the polyethylene white garbage after cleaning is dried with drier, then dry.The fragment of getting 1000g polyethylene white garbage is placed in reactor, adds the mixing solutions of dimethylbenzene, chloroform, naphthane and perhydronaphthalene, and wherein, the volume ratio of dimethylbenzene, chloroform, naphthane and perhydronaphthalene is 5:1:1:1, amounts to 5000g; Temperature of reaction kettle is adjusted to 140 ℃, and stirs 45 minutes with 85 revs/min, to dissolving, obtain containing poly organic solution.Then from feed inlet, add and containing the hydrogen-carbonate calcium powder of poly organic solution equivalent, and stir 30 minutes with 100 revs/min, be cooled to 20 ℃ to obtain mixture gel; This mixture gel is pulverized with pulverizer, be broken into powdery; Then this flour is distilled in recirculated water steam distillation unit, until remove dimethylbenzene, chloroform, naphthane and perhydronaphthalene, after cooling, adding water cleans, remove the calcium phosphate of precipitation, add water filtration separation, the filter residue obtaining is placed in 80 ℃, explosion-prevention water-bath baking oven and is dried 6 hours, obtains polyethylene again.Wherein, the poly purity that the present embodiment extracts is more than 90%.
(2) according to the mass fraction of following each component, take raw material: 5 parts of 170 parts of polyethylene, 80 parts of styrene-butadiene-styrene block copolymers, 28 parts of polyethylene terephthalates, 70 parts of polyvinyl butyral acetals, 9 parts of wollastonite powder, 0 part of silica 1,5 parts, asbestos, 6 parts of wood powders and cellulose powders.Wherein, polyethylene is the polyethylene extracting in step (1), and the poly content extracting according to step (1) takes according to poly umber in said components.
(3) polyethylene is mixed with styrene-butadiene-styrene block copolymer; adopt single screw rod primary and secondary tablets press melt pelletization, obtain the mangcorn of polyethylene and styrene-butadiene-styrene block copolymer, wherein; 1 millimeter of the diameter of mangcorn, length is 10 millimeters.
(4) above-mentioned mangcorn is mixed with polyethylene terephthalate, polyvinyl butyral acetal, wollastonite powder, silicon-dioxide, asbestos, wood powder and cellulose powder, employing twin screw extruder melt extrudes, and the asphalt that obtains the present embodiment is material modified.
According to quality, be 0.6%, the asphalt that the present embodiment is obtained is material modified, according to JTGF40-2004 industry standard, take No. 70 pitch adds in asphalt as matrix pitch, level is equipped with close-graded SMA-13, and the data that the pavement performance of the asphalt of the modification obtaining detects are in Table 1.
Embodiment 5
Material modified being prepared as follows of asphalt of the present embodiment:
(1) from white garbage, extract polyethylene: reclaim and the white garbage of classifying, by range estimation, find out polyethylene white garbage, then sent into band water crusher and carried out fragmentation, be chopped into the fragment that area is 0.01 ㎡, the fragment with water after chopping is sent into rinse bath by transport tape and is cleaned, through again rolling and clean, then the fragment of the polyethylene white garbage after cleaning is dried with drier, then dry.The fragment of getting 1000g polyethylene white garbage is placed in reactor, adds the mixing solutions of dimethylbenzene and chloroform, and wherein the volume ratio of dimethylbenzene and chloroform is 4:2, amounts to 5000g; Temperature of reaction kettle is adjusted to 150 ℃, and stirs and extremely dissolve for 40 minutes with 90 revs/min, obtain containing poly organic solution.Then from feed inlet, add and containing the sulfuric acid calcium powder of poly organic solution equivalent, and stir 30 minutes with 100 revs/min, be cooled to 10 ℃ to obtain mixture gel; This mixture gel is pulverized with pulverizer, be broken into powdery; Then this flour is distilled in recirculated water steam distillation unit, until remove dimethylbenzene and chloroform, cooling after, add water and clean, remove the calcium sulfate of precipitation, then through adding water filtration separation, the filter residue obtaining is placed in 60 ℃, explosion-prevention water-bath baking oven and is dried 8 hours, obtains polyethylene.Wherein, the poly purity that the present embodiment extracts is more than 90%.
(2) according to the mass fraction of following each component, take raw material: 3 parts of 150 parts of polyethylene, 90 parts of styrene-butadiene-styrene block copolymers, 16 parts of polyethylene terephthalates, 50 parts of polyvinyl butyral acetals, 6 parts of wollastonite powder, 3 parts, talcum, 5 parts of kaolin, 3 parts, asbestos and cellulose powders.Wherein, polyethylene is the polyethylene extracting in step (1), and the poly content extracting according to step (1) takes according to poly umber in said components.
(3) polyethylene is mixed with styrene-butadiene-styrene block copolymer; adopt single screw rod primary and secondary tablets press melt pelletization, obtain the mangcorn of polyethylene and styrene-butadiene-styrene block copolymer, wherein; 1 millimeter of the diameter of mangcorn, length is 10 millimeters.
(4) above-mentioned mangcorn is mixed with polyethylene terephthalate, polyvinyl butyral acetal, wollastonite powder, talcum, kaolin, asbestos and cellulose powder, adopt twin screw extruder to melt extrude, the asphalt that obtains the present embodiment is material modified.
According to quality, be 0.7%, the asphalt that the present embodiment is obtained is material modified, according to JTGF40-2004 industry standard, take No. 70 pitch adds in asphalt as matrix pitch, level is equipped with close-graded SMA-13, and the data that the pavement performance of the asphalt of the modification obtaining detects are in Table 1.
Table 1 represents is that the asphalt for preparing of embodiment 1～embodiment 5 is material modified, according to JTGF40-2004 industry standard, take No. 70 pitch and add in asphalt as matrix pitch, level is equipped with the asphalt of the modification that close-graded SMA-13 obtains and traditional data that directly pavement performance of the modified asphalt mixture of asphalt modification detected.
Table 1
From table 1, can learn, the Marshall stability of the asphalt after the material modified modification of asphalt of embodiment 1～embodiment 5 preparations, rut dynamic stability, immersion Marshall residual stability, freeze thawing splitting residual stability and low-temperature bending breaking strain are all apparently higher than the requirement of JTG F40-2004 national regulation, and higher than traditional directly modified asphalt mixture to asphalt modification, illustrating that asphalt in the present invention is material modified has an anti-rutting resistance of good high temperature, anti-low-temperature cracking deformability, and the water stability of soaked experiment in high low temperature, it is the material modified pavement performance that can effectively improve asphalt of asphalt in the present invention.
The above embodiment has only expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. an asphalt is material modified, it is characterized in that, the component that comprises following mass fraction: polyethylene is 150～200 parts, styrene-butadiene-styrene block copolymer is 60～90 parts, polyethylene terephthalate is 16～30 parts, polyvinyl butyral acetal is 50～80 parts, and weighting agent is 20～40 parts.
2. asphalt according to claim 1 is material modified, it is characterized in that, described styrene-butadiene-styrene block copolymer is line style styrene-butadiene-styrene block copolymer or star-like styrene-butadiene-styrene block copolymer; Described weighting agent is at least one in silica ashes, potter's clay, talcum, kaolin, flyash, silicon-dioxide, asbestos, wood powder and cellulose powder.
3. the material modified preparation method of asphalt, is characterized in that, comprises the steps:
Mass fraction according to following each component takes raw material: 20～40 parts of 150～200 parts of polyethylene, 60～90 parts of styrene-butadiene-styrene block copolymers, 16～30 parts of polyethylene terephthalates, 50～80 parts of polyvinyl butyral acetals and weighting agents;
Described polyethylene is mixed with described styrene-butadiene-styrene block copolymer, and melt pelletization, obtains the mangcorn of described polyethylene and described styrene-butadiene-styrene block copolymer; And
Described mangcorn is mixed with described polyethylene terephthalate, polyvinyl butyral acetal and weighting agent, melt extrude, obtain asphalt material modified.
4. the material modified preparation method of asphalt according to claim 3, it is characterized in that, also comprise and from white garbage, extract described poly step, from described white garbage, extract described poly step and comprise: described white garbage is broken into fragment; Organic solvent is joined in described fragment, at 140 ℃～160 ℃, be stirred to dissolving, obtain containing poly organic solution, then add and the described peptizer containing quality such as poly organic solutions, continue to stir after 30 minutes～40 minutes, be cooled to 10 ℃～35 ℃, obtain mixture gel, described organic solvent is two or more mixed solution being mixed to form in toluene, dimethylbenzene, chloroform, naphthane and perhydronaphthalene; Then described mixture gel is pulverized, then organic solvent is removed in distillation, then cleans and filtering separation through adding water, obtains polyethylene.
5. the material modified preparation method of asphalt according to claim 4, is characterized in that, described peptizer is calcium sulfate, calcium carbonate, Calcium hydrogen carbonate, calcium phosphate or polyethylene.
6. the material modified preparation method of asphalt according to claim 4, is characterized in that, the area of described fragment is 0.01 square metre～0.04 square metre.
7. the material modified preparation method of asphalt according to claim 3, is characterized in that, the equipment that the mixed mixture melt pelletization of described polyethylene and described styrene-butadiene-styrene block copolymer adopts is single screw rod primary and secondary tablets press.
8. the material modified preparation method of asphalt according to claim 3, is characterized in that, the diameter of described mangcorn is 1 millimeter～4 millimeters, and length is 1 millimeter～10 millimeters.
9. the material modified preparation method of asphalt according to claim 3, it is characterized in that, the equipment that described mangcorn and the mixed mixture of described polyethylene terephthalate, polyvinyl butyral acetal and weighting agent melt extrude employing is twin screw extruder.
10. the material modified preparation method of asphalt according to claim 3, it is characterized in that, described styrene-butadiene-styrene block copolymer is line style styrene-butadiene-styrene block copolymer or star-like styrene-butadiene-styrene block copolymer; Described weighting agent is at least one in silica ashes, potter's clay, talcum, kaolin, flyash, silicon-dioxide, asbestos, wood powder and cellulose powder.
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