CN1400252A - Modified asphalt composite and its preparation method - Google Patents
Modified asphalt composite and its preparation method Download PDFInfo
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- CN1400252A CN1400252A CN 01126386 CN01126386A CN1400252A CN 1400252 A CN1400252 A CN 1400252A CN 01126386 CN01126386 CN 01126386 CN 01126386 A CN01126386 A CN 01126386A CN 1400252 A CN1400252 A CN 1400252A
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- modified asphalt
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Abstract
The present invention relates to a modified asphalt composite and its preparation method. It adopts a kind of filling material with core-shell structure independently or compounds it with polymer as asphalt modifying agent. The preparation method of said composite is characterized by utilizing high-shearing equipment, including double-roller mixing machine, Banbury mixer, extruder, high-shearing emulsifying machine and colloid mill, etc., firstly, respectively preparing modified asphalt mother material and reactive mother material containing crosslinking agent, placing the above-mentioned mother materials and asphalt into conventional asphalt stirring machine according to a certain mixing ratio, stirring them so as to produce the invented composite.
Description
Technical field
The present invention relates to bituminous composition of a kind of performance characteristics and preparation method thereof.
Background technology
It is on record that pitch is used for the road surface bedding, but plain asphalt is on the one hand because softening temperature is low, and easily trickling under summer high-temperature causes the road surface that defectives such as rut prints, extrudes, foaming take place.On the other hand the brittle point height, cause the winter road surface easy to crack, water enters subcrust, causes the corruption of bottom road surface, greatly reduces the work-ing life on road surface.Along with the continuous increase of traffic loading, the maintenance cycle of prevailing roadway also constantly shortens work-ing life, and maintenance cost increases sharply.Simultaneously, increasing of servicing time also had a strong impact on traffic.The research of high performance modified bitumen has become an urgent demand that current road surface is built with application.In the prior art, it is general asphalt modification method that polymkeric substance is mixed pitch, and the polymkeric substance that is used for asphalt modification comprises styrene-butadiene-styrene block copolymer (SBS), ethylene-vinyl acetate copolymer (EVA), polyethylene (PE), styrene-butadiene rubber(SBR) (SBR) and composite etc.SBS is owing to have consistency preferably with pitch, and high temperature performance is the most superior, and pitch/SBS composition has become one of modifying asphalt kind of at present widespread use.But the SBS price is more expensive, its addition is subjected to strict restriction, simultaneously, modified effect preferably high molecular (molecular weight is greater than 70,000) the SBS spring shape body be difficult for to disperse in pitch, and bad package stability and quite high viscosity all can cause material to be difficult to handle (comprise processing, pump fail etc.).
Summary of the invention
Purpose of the present invention be exactly provide in order to overcome the defective that above-mentioned prior art exists that a kind of cost is lower, the modified asphalt composite of stability and good fluidity and preparation method thereof.
Purpose of the present invention can be achieved through the following technical solutions:
A kind of modified asphalt composite comprises following component and content (weight part):
(A) asphalt component
Deal is 100, and pitch can be petroleum pitch and coal-tar pitch, and penetration degree is 50 to 110.
(B) core-shell type organism modified filler
Deal is 1-15, is preferably 6-10.
Described modified filler is based on mineral filler, thermoplastic elastomer, thermoplastic resin, polymerized emulsion and composition thereof for preparing carriers form a kind of be nuclear with the mineral filler, carrier is a kind of core-shell structure particle of shell, and it comprises following component and content (weight ratio):
Mineral filler 60%-85%
Surface treatment agent 0%-3%
Polymkeric substance 15%-40%
Inorganic fillers can be one or more in diatomite, talcum powder, kaolin, lime carbonate, wollastonite, mica, silicon-dioxide, aluminum oxide, agalmatolite, the wilkinite, particle dia 0.05-20 μ m, and particle dia is 1-10 μ m preferably; Surface treatment agent can be the siloxanes coupling agent, refers to Υ-aminopropyl triethyl silicane, Υ-propyl methacrylate base Trimethoxy silane; Or titanate coupling agent, refer to sec.-propyl three different stearoyl titanic acid ester; Polymkeric substance can be styrene-butadiene rubber(SBR) (SBR), ethylene-vinyl acetate copolymer (EVA), styrene-butadiene-styrene triblock copolymer (SBS), ethylene-propylene-diene terpolymer (EPDM), ethylene-alpha-olefin copolymer, polyolefine; This polyolefine index and low density polyethylene (LDPE), linea low density polyolefine (LLPPE), ethylene-propylene copolymer (EPR), Atactic Polypropelene (APP), and maleic anhydride, bismaleimides, acrylate, vinyl monomer grafting or copolymerized grafting modification thermoplastic elastomer and thermoplastic resin, comprise the ethylene-propylene-diene terpolymer of bismaleimides graft modification, the ethylene-propylene-diene terpolymer of trimethoxy propane triacrylate modification, the ethylene-propylene rubber(EPR) of modified by maleic acid anhydride graft.
About 1.5: 1 to 6: 1 of the weight ratio of nuclear, shell is preferably 3: 2 to 3: 1, and certain chemical bonding is arranged between the nuclear-shell.
(C) polymer modifiers
Deal is 0-6, preferred 1-3.
Polymkeric substance can be can be polyethylene (PE), ethylene-vinyl acetate copolymer (EVA); styrene-butadiene rubber(SBR) (SBR); ethylene-propylene-diene terpolymer (EPDM); ethene-alpha-olefin copolymer; styrene-butadiene-styrene triblock copolymer (SBS); ethylene-propylene copolymer (EPR); be preferably styrene-butadiene rubber(SBR) (SBR); styrene-butadiene-styrene triblock copolymer (SBS); styrene-butadiene rubber(SBR) (SBR) wherein; styrene-butadiene-styrene triblock copolymer (SBS) molecular weight ranges is 20000-110000; be preferably 30000-50000, structure comprises linearity and branching.
(D) linking agent
Deal is 0.05-0.5, is preferably 0.1-0.3.
Linking agent can be superoxide, comprises dibenzoyl peroxide (BPO), dicumyl peroxide (DCP), or azo-compound, as: Diisopropyl azodicarboxylate (AIBN), or sulphur (S) etc.
A kind of preparation method of modified asphalt composite, this method is utilized High shear device, comprise twin-screw extruder, Banbury mixer, forcing machine, high-shear emulsion machine, colloidal mill etc., prepare earlier modifying asphalt masterbatch and the reactive masterbatch that contains linking agent respectively, again masterbatch and pitch are generated the composition with specified structure of the present invention with certain proportioning weight in general pitch whipping appts.Concrete operations can be divided into following three steps:
Step 1: the preparation of modifying asphalt masterbatch.
(1) proportioning of modifying asphalt masterbatch (total weight parts is 100):
Pitch 30-60 weight part
Core-shell type modified filler 40-70 weight part
Polymkeric substance 0-30 weight part
(2) dispersing and mixing processing parameter:
Mixing temperature: 80-180 ℃, preferred 120-160 ℃
Intermittent apparatus mixing time: 30-90min
Last master batch form is pellet or little bulk.
Step 2: the preparation of reactive masterbatch.
(1) proportioning of reactive masterbatch (total weight parts is 100):
Pitch 95-90 weight part
Linking agent 5-10 weight part
(2) dispersing and mixing processing parameter:
Mixing temperature: 80-180 ℃
Intermittent apparatus mixing time: 10-20min
Last master batch form is pellet or little bulk.
Step 3: the preparation of modifying asphalt
With certain feed ratio, the modifying asphalt masterbatch that makes, reactive masterbatch and pitch are mixed in the heating and stirring device commonly used in construction at present, reaction 10-30min is preferably 15-25min, and temperature of reaction is 150-210 ℃, is preferably 180-200 ℃.Control reactive masterbatch charging capacity, guarantee system is even, good fluidity.
Above step 1 and step 2 be order in no particular order.
The modified asphalt composite excellent performance that adopts present method to make, excellent storage stability.Compare with other polymer modified asphalts, because the polymkeric substance of modified filler shell is less, it is easier in the pitch institute swelling of certain consistency is arranged with it, under shear action, be easy to be dispersed in the pitch external phase, so the modifying asphalt masterbatch is easy to preparation, equipment is not had very high request, and mineral filler can enlarge the sphere of action of outer layer copolymer, the raising of pitch softening point is had great role.
Embodiment
The present invention is further elaborated below in conjunction with specific embodiment.
Embodiment 1:
Step 1: the preparation of modifying asphalt masterbatch.
The proportioning of modifying asphalt masterbatch (total weight parts is 100):
Pitch 50 weight parts
Core-shell type modified filler 50 weight parts
Pitch is selected Jiangyin 70# pitch for use, and core-shell type properties-correcting agent is inorganic particulate with kaolin, particle diameter 2-20 μ m, and the shell polymkeric substance is SBS, mineral filler and polymer weight ratio are 80: 20.Adopt high-shear emulsifying instrument dispersing and mixing, mixing temperature 150-180 ℃, time 60min, mixing rotating speed 4500 changes/hour
Step 2: the preparation of reactive masterbatch
Each set of dispense ratio:
Pitch 95 (weight part)
Sulphur 5 (weight part)
Pitch is selected Jiangyin 70# pitch for use, and sulphur is the general industry level, and 100 ℃ of mixing temperatures adopt the high-shear emulsifying instrument, mixing time 20min, and mixing rotating speed 2500 changes/hour.
Step 3: the preparation of bituminous composition
By weight: 100 parts of pitches, 15 parts of modifying asphalt masterbatch, 3 parts of reactive masterbatch place the plain asphalt whipping appts to stir, temperature is 190 ℃, reaction 20min obtains having high-performance, the bituminous composition of homogeneous, excellent storage stability.
Embodiment 2:
Same method prepares modifying asphalt masterbatch and reactive masterbatch among the employing embodiment 1, by weight: 100 parts of pitches, 20 parts of modifying asphalt masterbatch, 5 parts of reactive masterbatch place the plain asphalt whipping appts to stir, 190 ℃ of temperature, reaction 20min obtains bituminous composition.
Embodiment 3:
Step 1: the preparation of modifying asphalt masterbatch
Modifying asphalt masterbatch set of dispense is than (total weight parts is 100):
Pitch 50 (weight part)
Core-shell type properties-correcting agent 40 (weight part)
SBS 10 (weight part)
Used pitch and core-shell type properties-correcting agent are with embodiment 1, and SBS is high mountain product XH-792.Adopt the high-shear emulsifying instrument to mix, mixing temperature 150-180 ℃, mixing time be 60min. mixings rotating speed be 4500 commentaries on classics/hour.
Step 2: the preparation of reactive masterbatch
The preparation of reactive masterbatch is with embodiment 1.
Step 3: the preparation of bituminous composition
By weight: 100 parts of pitches, 15 parts of modifying asphalt masterbatch, reactive masterbatch places the plain asphalt whipping appts to mix for 3 parts, 195 ℃ of temperature, the reaction 30min, obtain modified asphalt composite.
Embodiment 4
Same method prepares modifying asphalt masterbatch and reactive masterbatch among the employing embodiment 3, by weight: 100 parts of pitches, 20 parts of modifying asphalt masterbatch, 5 parts of reactive masterbatch place the plain asphalt whipping appts to stir, 190 ℃ of temperature, reaction 30min obtains bituminous composition.
Table one: modifying asphalt three big index test results
Performance | Contrast (Jiangyin 70 #) | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 |
Penetration degree (25 ℃, 100g, 5s) 0.1mm | ????67 | ????59 | ????60 | ????62 | ????65 |
Softening temperature | ????47 | ????62 | ????65 | ????61 | ????64 |
Ductility (5 ℃, 50mm) cm | ????<5 | ????42 | ????46 | ????44 | ????49 |
Annotate: above testing standard is a GB
Modified asphalt composite provided by the present invention has little crosslinked tridimensional network.Specifically between the bituminous matter that pitch comprised, between bituminous matter and the polymkeric substance that added, between the polymer macromolecule, between polymkeric substance and the filler shell macromole, the chemical bonded refractory that some amount is arranged, structure has partial tridimensional network, thereby makes composition have package stability, but integral body has flowable.
The purposes of bituminous composition provided by the present invention comprises: high-grade highway, and bridge, the road surface of airfield runway etc. covers.
Claims (10)
1. a modified asphalt composite is characterized in that, comprises following component and content (weight part):
Pitch 100
Core-shell type organism modified filler 1-15
Polymer modifiers 0-6
Linking agent 0.05-0.5
2. modified asphalt composite according to claim 1 is characterized in that, described pitch is petroleum pitch or coal-tar pitch, and its penetration degree is 50-110.
3. modified asphalt composite according to claim 1 is characterized in that, described core-shell type organism modified filler comprises following component and content (weight ratio):
Mineral filler 60%-85%
Surface treatment agent 0%-3%
Polymkeric substance 15%-40%
4. modified asphalt composite according to claim 3, it is characterized in that, described inorganic fillers can be one or more in diatomite, talcum powder, kaolin, lime carbonate, wollastonite, mica, silicon-dioxide, aluminum oxide, agalmatolite, the wilkinite, and its particle dia is 0.05~20 μ m; Described surface treatment agent can be the siloxanes coupling agent, or titanate coupling agent; Described polymkeric substance can be styrene-butadiene rubber(SBR), ethylene-vinyl acetate copolymer, styrene-butadiene-styrene triblock copolymer, ethylene-propylene-diene terpolymer, ethene-alpha-olefin copolymer, polyolefine.
5. modified asphalt composite according to claim 4 is characterized in that, described siloxanes coupling agent refers to Υ-aminopropyl triethyl silicane, Υ-propyl methacrylate base Trimethoxy silane.
6. modified asphalt composite according to claim 4 is characterized in that, described titanate coupling agent refers to sec.-propyl three different stearoyl titanic acid ester,
7. modified asphalt composite according to claim 4, it is characterized in that, described polyolefine index and low density polyethylene, linea low density polyolefine, ethylene-propylene copolymer, Atactic Polypropelene, and maleic anhydride, bismaleimides, acrylate, vinyl monomer grafting or copolymerized grafting modification thermoplastic elastomer and thermoplastic resin, comprise the ethylene-propylene-diene terpolymer of bismaleimides graft modification, the ethylene-propylene-diene terpolymer of trimethoxy propane triacrylate modification, the ethylene-propylene rubber(EPR) of modified by maleic acid anhydride graft.
8. modified asphalt composite according to claim 1, it is characterized in that, described polymer modifiers can be polyethylene, ethylene-vinyl acetate copolymer, styrene-butadiene rubber(SBR), ethylene-propylene-diene terpolymer, styrene-butadiene-styrene triblock copolymer, ethylene-propylene copolymer, wherein styrene-butadiene rubber(SBR), styrene-butadiene-styrene triblock copolymer molecular weight ranges are 20,000-110,000, structure comprises linearity and branching.
9. modified asphalt composite according to claim 1 is characterized in that described linking agent can be a superoxide, refers to dibenzoyl peroxide, dicumyl peroxide, or azo-compound, refers to Diisopropyl azodicarboxylate, or sulphur.
10. the preparation method of the described modified asphalt composite of claim 1 is characterized in that, comprises following processing step:
A. the preparation of modifying asphalt masterbatch: with pitch, core-shell type modified filler, polymer modifiers by weight (total weight parts is 100) be respectively: the ratio of 30-60,40-70,0-30 is mixed in mixing equipment, obtains the modifying asphalt masterbatch;
B. the preparation of the reactive masterbatch of linking agent: with pitch, linking agent by weight (total weight parts is 100) be: the ratio of 90-95,5-10 is mixed in mixing equipment, obtains reactive master batch of bitumen;
C. the preparation of modified asphalt composite: described modifying asphalt masterbatch and reactive masterbatch and pitch are stirred in the plain asphalt whipping device, obtain modified asphalt composite.
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CN 01126386 CN1400252A (en) | 2001-08-01 | 2001-08-01 | Modified asphalt composite and its preparation method |
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CN 01126386 CN1400252A (en) | 2001-08-01 | 2001-08-01 | Modified asphalt composite and its preparation method |
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Cited By (25)
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CN100485003C (en) * | 2006-04-24 | 2009-05-06 | 深圳清华大学研究院 | Bituminous composite modified master and method for preparing modified asphalt |
CN100554334C (en) * | 2006-12-20 | 2009-10-28 | 中国矿业大学(北京) | A kind of method of improving performance of diatomite modified asphalt material |
CN1935905B (en) * | 2006-09-30 | 2010-05-12 | 武汉理工大学 | Age-resistant modified asphalt and its preparing method |
CN101921419A (en) * | 2010-08-18 | 2010-12-22 | 西安国琳实业有限公司 | High-modulus modifier composite of bituminous mixture and preparation method thereof |
CN101942206A (en) * | 2010-10-20 | 2011-01-12 | 侯罡 | Asphalt modifier and preparation method thereof |
CN102153874A (en) * | 2011-05-16 | 2011-08-17 | 山东交通学院 | Composite modified asphalt and preparation method thereof |
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2001
- 2001-08-01 CN CN 01126386 patent/CN1400252A/en active Pending
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CN108623277A (en) * | 2018-05-25 | 2018-10-09 | 合肥奇呗数字科技有限公司 | One kind can cracking resistance thermal-insulating type mortar and preparation method thereof |
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