CN101717587B - Blended composite modified asphalt and preparation method thereof - Google Patents

Blended composite modified asphalt and preparation method thereof Download PDF

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Publication number
CN101717587B
CN101717587B CN2009103114770A CN200910311477A CN101717587B CN 101717587 B CN101717587 B CN 101717587B CN 2009103114770 A CN2009103114770 A CN 2009103114770A CN 200910311477 A CN200910311477 A CN 200910311477A CN 101717587 B CN101717587 B CN 101717587B
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modified asphalt
composite modified
linking agent
catalyzer
mass percent
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CN101717587A (en
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方长青
周世生
陈瑞
骆光林
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Xian University of Technology
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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
    • 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
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/62—Plastics recycling; Rubber recycling

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Abstract

The invention discloses blended composite modified asphalt, which comprises the following components in percentage by mass: 2 to 6 percent of waste packing polymer EVA, 2 to 15 percent of waste tire powder, 76.5 to 90.5 percent of matrix asphalt, 0.02 to 0.5 percent of cross linker and 1 to 2 percent of catalyst. A preparation method for the blended composite modified asphalt comprises the following steps: firstly, weighing 2 to 6 percent of waste packing polymer EVA, 2 to 15 percent of waste tire powder, 76.5 to 90.5 percent of matrix asphalt, 0.02 to 0.5 percent of cross linker and 1 to 2 percent of catalyst in percentage by mass; and smelting the matrix asphalt at the temperature of between 150 and 180 DEG C, adding the waste packing polymer EVA and the waste tire powder into the smelted matrix asphalt, keeping the temperature constant, manually stirring the mixture for 20 to 40 minutes, adding the cross linker and the catalyst into the mixture, and stirring the mixture for 100 to 120 minutes by a shearing machine to obtain the blended composite modified asphalt. The blended composite modified asphalt and the preparation method thereof of the invention solve the problems of large consumption of waterproof material polymer and complex equipment in the physical modification method for preparing the modified asphalt.

Description

A kind of blended composite modified asphalt and preparation method thereof
Technical field
The invention belongs to building material technical field, relate to a kind of modified asphalt material, be specifically related to a kind of blended composite modified asphalt, the invention still further relates to the preparation method of this blended composite modified asphalt.
Background technology
So-called modifying asphalt; According to the definition of China's " GB/T18378-2000 water proofing asphalt and waterproof roll term ", be meant and in pitch, evenly sneak into the mixture that rubber, synthetic resins equimolecular quantity make greater than the organic high molecular polymer of the molecular weight of pitch own.
At present, most modified asphalt waterproof materials all are that polymkeric substance is scattered in the fused pitch to stir, to grind through hot melt process, i.e. the physically modified method.After this method modification, bituminous high temperature rigid, low temperature flexibility and temperature sensitivity are improved.Though physically modified has plurality of advantages, also exist the improvement amplitude limited, polymer loading is big, deficiencies such as complex equipments.In order to improve this situation, the reactive blending method of modifying receives people's attention day by day.
Summary of the invention
The purpose of this invention is to provide a kind of blended composite modified asphalt, solved the unfavorable problem of high temperature rigid, low temperature flexibility and temperature sensitivity of existing blended composite modified asphalt.
Another object of the present invention provides the preparation method of above-mentioned blended composite modified asphalt, and having solved existing physically modified legal system, to be equipped with the modified asphalt material polymer loading big, the problem of complex equipments.
The technical scheme that the present invention adopted is, a kind of blended composite modified asphalt, by mass percentage; It consists of: discarded packing polymer EVA: 2%-6%; Scrap tire powder: 2%-15%, matrix pitch: 76.5%-90.5%, linking agent: 0.02%-0.5%; Catalyzer: 1%-2%, the mass percent sum of each component is 100%.
Another technical scheme that the present invention adopted is, a kind of method for preparing blended composite modified asphalt is specifically implemented according to following steps,
Step 1: take by weighing the discarded packing polymer EVA of 2%-6%, the scrap tire powder of 2%-15%, the matrix pitch of 76.5%-90.5%, the linking agent of 0.02%-0.5% and the catalyzer of 1%-2% according to mass percent, the mass percent sum of each component is 100%;
Step 2: the matrix pitch fusing that under 150 ℃-180 ℃ temperature, step 1 is taken by weighing; In the matrix pitch of discarding after packing polymer EVA and scrap tire powder join fusing; Keep homo(io)thermism, hand mixing 20-40min adds linking agent and catalyzer that step 1 takes by weighing; Shears stirs 100-120min, obtains blended composite modified asphalt.
Characteristics of the present invention also are,
Linking agent wherein adopts Vinylstyrene;
Catalyzer wherein adopts tosic acid.
The beneficial effect of blended composite modified asphalt of the present invention and preparation method thereof is; Adopt the two kinds of polymkeric substance of different nature of package waste polymer, shoddy that reclaim as properties-correcting agent; Through adding proper amount of cross-linking agent and catalyzer; It is composite modified that plain asphalt waterproof base material is carried out blend, and the modified asphalt waterproof material of production high-performance, low price is when improving the pitch comprehensive waterproof capability; Solve physically modified and asphalt performance is improved problems such as amplitude is limited, polymer loading big, complex equipments, and alleviate " white pollution " that package waste polymer causes environment greatly.
Description of drawings
Fig. 1 is the softening temperature and the penetration degree change curve of the blended composite modified asphalt for preparing of the present invention;
Fig. 2 is the blended composite modified asphalt unit elongation change curve that the present invention prepares;
Fig. 3 is the pulling force conservation rate variation diagram of the blended composite modified asphalt for preparing of the present invention;
Fig. 4 extends the conservation rate variation diagram when being the maximum pull of the blended composite modified asphalt for preparing of the present invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is elaborated.
The bituminous component is very complicated, can be divided into bituminous matter, colloid, aromatic hydrocarbon and 4 components of stable hydrocarbon usually.Components such as pitch medium pitch matter, colloid are complicated miscellanys, comprise many aromatic rings, Hete rocyclic derivatives, and the miscellany that aromatic ring, naphthenic hydrocarbon and heterocyclic repeat unit structure are arranged.The C-S key etc. of easy fracture of being heated on reactive hydrogen on the aromatic ring a position and the alkane can produce active point, and this is the point of penetration that pitch carries out the reactive blending modification.In addition, acidity on the bituminous matter or basic group can react with the corresponding group on the polymkeric substance.Under the effect of linking agent and catalyzer, aromatic ring can polycondensation.Use when containing the polymer modified asphalt of ethylene linkage, add linking agent and make the polymkeric substance generation crosslinked, and make pitch and polymkeric substance generate chemical the connection.Dispersive polymer beads sub-surface forms stabilizing layer through reaction, has improved superpolymer and bituminous consistency.
Use when containing the polymer modified asphalt of ethylene linkage, the linking agent of adding has elemental sulfur, superoxide, diaryl disulphide, resol etc.The research in early stage is only attempted the action effect of linking agent, but concrete blending reaction process is not done systematic study, and the mechanism of action of linking agent and catalyzer is analysed in depth as yet.Meanwhile, the polymkeric substance and the pitch that contain unsaturated link(age) are in the crosslinking reaction modification, and dosage of crosslinking agent, temperature of reaction, reaction times, feed way etc. all have direct influence to crosslinking reaction: crosslinked deficiency does not reach the purpose of reaction modifying; Excessive crosslinked meeting makes asphalt viscosity too high, so that can't construct.Therefore, the reactive blending modified technique is studied, is optimized also particularly important.
Blended composite modified asphalt of the present invention; By mass percentage, it consists of: discarded packing polymer EVA: 2%-6%, scrap tire powder: 2%-15%; Matrix pitch: 76.5%-90.5%; Linking agent: 0.02%-0.5%, catalyzer: 1%-2%, the mass percent sum of each component is 100%.Wherein, linking agent adopts Vinylstyrene (DVB), and catalyzer adopts tosic acid.
The present invention prepares the method for blended composite modified asphalt, specifically implements according to following steps:
Step 1: take by weighing the discarded packing polymer EVA of 2%-6%, the scrap tire powder of 2%-15%, the matrix pitch of 76.5%-90.5%, the linking agent of 0.02%-0.5% and the catalyzer of 1%-2% according to mass percent; The mass percent sum of each component is 100%; Linking agent wherein adopts Vinylstyrene (DVB), and catalyzer adopts tosic acid.
Step 2: the matrix pitch fusing that under 150 ℃-180 ℃ temperature, step 1 is taken by weighing; In the matrix pitch of discarding after packing polymer EVA and scrap tire powder join fusing; Keep homo(io)thermism, hand mixing 20-40min adds linking agent and catalyzer that step 1 takes by weighing; Shears stirs 100-120min, obtains blended composite modified asphalt.
Small molecules generation chemical reaction in linking agent DVB and the matrix pitch, reaction generates methyl and methylene radical, and the content of methyl and methylene radical increases in the feasible reaction post-modification pitch, and reaction formula is following:
Figure G200910311477020091215D000031
Below significant effects factor in blended composite modified asphalt of the present invention and preparation method thereof is set forth aspect theoretical:
One, dosage of crosslinking agent is to the influence of blended composite modified asphalt
Modification temperature is under 155 ℃, catalyst levels 2%, modification time 2h; Linking agent to the influence of EVA modifying asphalt softening temperature and penetration degree is: when DVB/asphalt＜0.022; Softening temperature improves along with the increase of DVB consumption, and when DVB/asphalt=0.022, softening temperature has raise 47%; When DVB/asphalt＞0.022, softening temperature reduces along with the increase of DVB consumption.This is because when DVB/asphalt≤0.022, and it is crosslinked that linking agent makes that polymkeric substance takes place, and pitch is connected with polymkeric substance span network, causes the rising of modifying asphalt softening temperature.When DVB/asphalt＞0.022, penetration degree is just in time opposite with the Changing Pattern and the softening temperature of DVB consumption, and when DVB/asphalt=0.022, penetration degree reduces by 22.5%.
Two, modification temperature is to the influence of blended composite modified asphalt
Under DVB/asphalt=0.022 (mass ratio), catalyst levels 2%, the reaction times 2h; Modification temperature is to the influence of EVA modifying asphalt softening temperature and penetration degree: along with the rising of modification temperature; The softening temperature of modifying asphalt constantly increases, but after temperature reached 155 ℃, the softening temperature variation eased up.Penetration degree reduces along with the rising of modification temperature.The rising of modification temperature; Help polymkeric substance DVB softening and through dispersed with stirring in matrix pitch, when temperature was elevated to 155 ℃, polymkeric substance can melt and be dispersed in the matrix pitch under this temperature basically; So when temperature continuation rising, its softening temperature, penetration degree variation tend towards stability.
Three, modification time is to the influence of blended composite modified asphalt
155 ℃ of DVB/asphalt=0.022 (mass ratio), catalyst levels 2%, modification temperature, modification time to the influence of EVA modifying asphalt softening temperature and penetration degree is: softening temperature is along with the prolongation in reaction times, the corresponding increase of softening temperature.When 0.5h≤t≤2.0h, the softening temperature increase rate is 33.5%, the penetration degree range of decrease 46.1%.When 2.0h≤t≤3.0h, the softening temperature increase rate is 0.9%; The penetration degree range of decrease 1.5%.Obviously, modification time is in 2h, and the performance change of modifying asphalt is comparatively remarkable; Modification time is more than 2h, and the performance change of modifying asphalt is less.This shows modification time when the 2h left and right sides, and modification blend process is accomplished basically, and its performance is basicly stable, and modification time is less to the bituminous performance impact.
Four, catalyst levels is to the influence of blended composite modified asphalt
155 ℃ of DVB/asphalt=0.022 (mass ratio), modification time 2h, modification temperature, catalyzer to the influence of EVA modifying asphalt softening temperature and penetration degree is: along with the increase of catalyst levels, very big variation has taken place in softening temperature and penetration degree.When catalyst levels during at 1%-2%, softening temperature increases with the increase of catalyst levels, and penetration degree reduces with the increase of catalyst levels, and catalyst levels is 2% when above, and softening temperature and penetration degree change and eases up.Under the effect of catalyzer, it is crosslinked that linking agent makes that polymkeric substance takes place, and polymkeric substance takes place by molten expanding simultaneously, becomes the spatial network system with matrix pitch, improves the modifying asphalt softening temperature, and penetration degree reduces; In modifying process, catalyst levels was greater than 2% o'clock, and cross-linking process is accomplished basically, and influence weakens catalyzer greatly to performance of modified bitumen, and performance of modified bitumen tends towards stability.
Embodiment 1
Take by weighing 2% discarded packing polymer EVA, 5% scrap tire powder, 90.5% matrix pitch, 0.5% Vinylstyrene, 2% tosic acid according to mass percent; Under 150 ℃ temperature,, in the matrix pitch of discarding after packing polymer EVA and scrap tire powder join fusing, keep homo(io)thermism with load weighted matrix pitch fusing; Hand mixing 20min; Add Vinylstyrene and tosic acid, shears stirs 100min, obtains blended composite modified asphalt.
Embodiment 2
Take by weighing 6% discarded packing polymer EVA, 15% scrap tire powder, 77.98% matrix pitch, 0.02% Vinylstyrene, 1% tosic acid according to mass percent; Under 180 ℃ temperature,, in the matrix pitch of discarding after packing polymer EVA and scrap tire powder join fusing, keep homo(io)thermism with load weighted matrix pitch fusing; Hand mixing 40min; Add Vinylstyrene and tosic acid, shears stirs 120min, obtains blended composite modified asphalt.
Embodiment 3
Take by weighing 6% discarded packing polymer EVA, 2% scrap tire powder, 89.5% matrix pitch, 0.5% Vinylstyrene, 2% tosic acid according to mass percent; Under 160 ℃ temperature,, in the matrix pitch of discarding after packing polymer EVA and scrap tire powder join fusing, keep homo(io)thermism with load weighted matrix pitch fusing; Hand mixing 30min; Add Vinylstyrene and tosic acid, shears stirs 120min, obtains blended composite modified asphalt.
Embodiment 4
Take by weighing 6% discarded packing polymer EVA, 15% scrap tire powder, 76.5% matrix pitch, 0.5% Vinylstyrene, 2% tosic acid according to mass percent; Under 160 ℃ temperature,, in the matrix pitch of discarding after packing polymer EVA and scrap tire powder join fusing, keep homo(io)thermism with load weighted matrix pitch fusing; Hand mixing 30min; Add Vinylstyrene and tosic acid, shears stirs 110min, obtains blended composite modified asphalt.
Fig. 1 is the softening temperature and the penetration degree change curve of the blended composite modified asphalt of four embodiment preparations of the present invention; As can be seen from the figure; The softening temperature of the modifying asphalt of embodiment 1, embodiment 2, embodiment 3 and embodiment 4 preparations is respectively 42 ℃, and 44 ℃, 47 ℃ and 55 ℃; 25 ℃ of penetration degrees are respectively 42 (0.1mm), 39 (0.1mm), 37 (0.1mm) and 36 (0.1mm).Softening temperature is the reflection of pitch high temperature resistance trickling performance, and penetration degree a kind of specific viscosity that is bituminous, penetration degree is more little, and then the hardness of asphalt water-proof coiled material is big more, and its stiffness is good more.Fig. 1 result shows that the high-temperature behavior of packing waste of polymeric, the composite modified back asphalt waterproofing of shoddy blend base material has obtained obvious improvement, and its penetration degree reduces, and the coiled material deflection improves.
Fig. 2 is the blended composite modified asphalt unit elongation change curve of four embodiment preparations of the present invention; As can be seen from the figure; After the modification, bituminous low temperature unit elongation obviously improves, and the unit elongation of the modifying asphalt of embodiment 4 preparations is more than 4 times of matrix pitch; After showing that blend is composite modified, bituminous toughness improves.
Fig. 3 is the pulling force conservation rate variation diagram of the blended composite modified asphalt of four embodiment preparations of the present invention; Fig. 4 extends the conservation rate variation diagram when being the maximum pull of blended composite modified asphalt of four embodiment of the present invention preparation; As can be seen from the figure; After acid, alkali, salt are handled, extend conservation rate when the pulling force of modified bituminous pitch coiled material and maximum pull and all remain on more than 85%, explain the blended composite modified asphalt waterproof roll anti-, sour, the alkali salt corrosive nature is better.

Claims (6)

1. a blended composite modified asphalt is characterized in that, by mass percentage; It consists of: discarded packing polymer EVA: 2%, and scrap tire powder: 5%, matrix pitch: 90.5%; Linking agent: 0.5%, catalyzer: 2%, the mass percent sum of each component is 100%;
Perhaps, by mass percentage, it consists of: discarded packing polymer EVA: 6%, and scrap tire powder: 15%, matrix pitch: 77.98%, linking agent: 0.02%, catalyzer: 1%, the mass percent sum of each component is 100%;
Perhaps, by mass percentage, it consists of: discarded packing polymer EVA: 6%, and scrap tire powder: 2%, matrix pitch: 89.5%, linking agent: 0.5%, catalyzer: 2%, the mass percent sum of each component is 100%;
Perhaps, by mass percentage, it consists of: discarded packing polymer EVA: 6%, and scrap tire powder: 15%, matrix pitch: 76.5%, linking agent: 0.5%, catalyzer: 2%, the mass percent sum of each component is 100%.
2. blended composite modified asphalt according to claim 1 is characterized in that, described linking agent adopts Vinylstyrene.
3. blended composite modified asphalt according to claim 1 is characterized in that, described catalyzer adopts tosic acid.
4. a method for preparing the described blended composite modified asphalt of claim 1 is characterized in that,
Specifically implement according to following steps,
Step 1: take by weighing 2% discarded packing polymer EVA, 5% scrap tire powder, 90.5% matrix pitch, 0.5% linking agent and 2% catalyzer according to mass percent, the mass percent sum of each component is 100%;
Perhaps take by weighing 6% discarded packing polymer EVA, 15% scrap tire powder, 77.98% matrix pitch, 0.02% linking agent and 1% catalyzer according to mass percent, the mass percent sum of each component is 100%;
Perhaps take by weighing 6% discarded packing polymer EVA, 2% scrap tire powder, 89.5% matrix pitch, 0.5% linking agent and 2% catalyzer according to mass percent, the mass percent sum of each component is 100%;
Perhaps take by weighing 6% discarded packing polymer EVA, 15% scrap tire powder, 76.5% matrix pitch, 0.5% linking agent and 2% catalyzer according to mass percent, the mass percent sum of each component is 100%;
Step 2: the matrix pitch fusing that under 150 ℃-180 ℃ temperature, step 1 is taken by weighing; In the matrix pitch of discarding after packing polymer EVA and scrap tire powder join fusing; Keep homo(io)thermism, hand mixing 20-40min adds linking agent and catalyzer that step 1 takes by weighing; Shears stirs 100-120min, obtains blended composite modified asphalt.
5. the preparation method of blended composite modified asphalt according to claim 4 is characterized in that, described linking agent adopts Vinylstyrene.
6. the preparation method of blended composite modified asphalt according to claim 4 is characterized in that, described catalyzer adopts tosic acid.
CN2009103114770A 2009-12-15 2009-12-15 Blended composite modified asphalt and preparation method thereof Expired - Fee Related CN101717587B (en)

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CN103756708B (en) * 2014-01-16 2015-07-15 神华集团有限责任公司 Modified asphalt and preparation method thereof
CN104877410A (en) * 2015-05-09 2015-09-02 安徽快来防水防腐有限公司 Low-temperature-resisting light-fastness EVA modified asphalt waterproof coiled material and preparation method thereof
CN104962089A (en) * 2015-06-29 2015-10-07 西安理工大学 Compound modified asphalt and preparation method and performance influence evaluation method thereof
CN112382794B (en) * 2020-08-03 2021-10-15 万向一二三股份公司 Preparation method of graphite cathode lithium ion battery

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