CN102408734A - High-elastic modified asphalt and preparation method thereof - Google Patents
High-elastic modified asphalt and preparation method thereof Download PDFInfo
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- CN102408734A CN102408734A CN2011103057188A CN201110305718A CN102408734A CN 102408734 A CN102408734 A CN 102408734A CN 2011103057188 A CN2011103057188 A CN 2011103057188A CN 201110305718 A CN201110305718 A CN 201110305718A CN 102408734 A CN102408734 A CN 102408734A
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Abstract
High-elastic modified asphalt is prepared by using base asphalt, polymer, an antiaging agent, a synthetic ester plasticizer, and a stabilizer as raw materials; the synthetic ester plasticizer is one of or any combination of more than one of di-n-butyl phthalate, di-n-hexyl phthalate, di-n-octyl phthalate, diphenyl octyl phosphate, trioctyl phosphate, or tributoxyethyl phosphate. An asphalt mixture prepared by the high-elastic modified asphalt of the invention is especially applicable to steel bridge deck pavement; with the guarantee that the high-temperature performance of the modified asphalt is not reduced greatly, the low-temperature deformation resistance and the fatigue resistance of the modified asphalt are greatly improved; the ductility at 5 DEG C of the high-elastic modified asphalt of the invention is increased by 2-3 times when compared with that of common modified asphalt; the low-temperature ultimate bending strain at -10 DEG C of the mixture of the high-elastic modified asphalt of the invention is increased nearly twice when compared with that of routine modified asphalt mixture, and the fatigue life is increased by more than 5 times; and the cracking time for steel bridge deck asphalt mixture pavement is obviously prolonged.
Description
Technical field
The present invention relates to modifying asphalt and preparation method thereof, be specifically related to a kind of high-elastic modifying asphalt and preparation method thereof.
Background technology
The modified asphalt SMA structure is owing to have good thermostability; Surface irregularity is even, antiskid; Particularly the high temperature and rainy weather that structure is adapted to China's southern area is squeezed in the coarse aggregate embedding; Anti-rut aspect of performance under high temperature heavy load has greater advantage, the paving steel bridge deck wearing course of doing therefore commonly used at home.But the distortion of paving steel bridge deck asphalt is obviously big than the distortion of road surface compound; Longitudinal cracking or check crack just can take place in general about 3 years in existing modified asphalt SMA under low temperature gross distortion and fatigue deformation situation repeatedly, this and 15 years lives differ greatly; In addition; According to finite element analysis; Orthotropic Steel Bridge Deck least favorable lotus position occurs in U type rib top, and the upper layer compound of least favorable lotus position can produce hogging moment, and the anti-low-temperature deformation and the antifatigue cracking performance of this further facings compound are had higher requirement.
Present domestic modifying asphalt prescription is generally through adding the high temperature performance that SBS or SBR superpolymer improve modifying asphalt in modifying asphalt, if anti-low-temperature deformation ability of modifying asphalt or antifatigue deformability need further to improve through adding anti-low-temperature deformation ability and the anti-fatigue performance that materials such as petroleum line softener, fatty oil softener can improve modifying asphalt to a certain extent again.The modifying asphalt deformability that realizes through above prescription is used for the road surface and generally can also satisfies the pavement performance requirement; But, also be not applicable to the asphalt of paving steel bridge deck at present for asphalt rimose disease generally will soon take place on the flexible structure of this gross distortion of steel bridge face.
Summary of the invention
The object of the present invention is to provide the good high-elastic modifying asphalt of a kind of resistance to cleavage.
Another object of the present invention is to provide above-mentioned high-elastic modified asphalt preparation method, this preparation method is simple to operate, be suitable for commercial scale prodn.
The objective of the invention is to realize through following technical scheme:
A kind of high-elastic modifying asphalt is characterized in that: it is that raw material makes with matrix pitch, superpolymer, inhibitor, synthesizing ester softening agent and stablizer; Said synthesizing ester softening agent is one or more arbitrary combination in Witcizer 300, dihexyl phthalate, DOP, diphenyl octyl phospbate, trioctyl phosphate or the tributoxyethyl phosphate.
In research process, find; Because of the synthesizing ester softening agent of a great variety; When wherein much being used for pitch flash-point do not reach require its from pitch, separate out easily the raising of not dissolving each other or resisting the low-temperature deformation ability not obvious, do not have an effect; The contriver was once suspecting once also whether the adding softening agent is effective in modifying asphalt, and the contriver has carried out a large amount of cut-and-try works in the chosen process of synthesizing ester softening agent; The final discovery, adopt synthesizing ester softening agent of the present invention after, the anti-low-temperature deformation ability of modifying asphalt and asphalt all has significantly raising with antifatigue cracking ability.
For anti-low-temperature deformation ability and the antifatigue cracking ability that further improves modifying asphalt of the present invention; The consumption of above-mentioned each raw material is: matrix pitch is that 100 parts, superpolymer are that 3-20 part, inhibitor are that 0.2-2 part, synthesizing ester softening agent are that 3-20 part, stablizer are 0.1-1 part, in mass parts.
More preferably, the consumption of above-mentioned each raw material is: matrix pitch is that 100 parts, superpolymer are that 5-9 part, inhibitor are that 0.3-1 part, synthesizing ester softening agent are that 6-9 part, stablizer are 0.2-0.4 part, in mass parts.
For the anti-low-temperature deformation ability that further improves modifying asphalt of the present invention and antifatigue cracking ability, above-mentioned synthesizing ester softening agent is that 1: 2.5 DOP and tributoxyethyl phosphate formed by mass ratio.
Above-mentioned matrix pitch preferably adopts road with straight-run 70# or 90# matrix pitch.
Also find in the research process; Effectively improving on the bituminous anti-cracking performance basis; If component mismate; The compound ageing resistance of modifying asphalt of the present invention is also undesirable; For the resistance of aging of the compound that strengthens modifying asphalt of the present invention, thereby further improve the over-all properties of modifying asphalt of the present invention, above-mentioned inhibitor is one or more arbitrary combination in pentaerythritol tetrathioglycollate, β-propionic acid octadecanol ester, Tyox B, the NSC 65881 diphosphites; The consumption of above-mentioned each raw material is 100 parts of matrix pitches, 7 parts of superpolymer, 0.4 part of inhibitor, 7 parts in synthesizing ester softening agent, 0.3 part of stablizer, in mass parts.
Above-mentioned superpolymer preferably adopts one or more arbitrary combination in thermoplastic styrene butadiene rubber SBS, hydrogenation thermoplastic styrene butadiene rubber SEBS, the styrene butadiene rubber sbr; Above-mentioned superpolymer is that 1: 1.5: 3 thermoplastic styrene butadiene rubber SBS, hydrogenation thermoplastic styrene butadiene rubber SEBS and styrene butadiene rubber sbr formed by mass ratio preferably further.
Sulphur or Di Cumyl Peroxide 99 are preferably adopted in the aforementioned stable agent.
Most preferred; A kind of high-elastic modifying asphalt, it is that road with 100 mass parts uses straight-run 70# or 90# matrix pitch, the superpolymer of 7 mass parts, the inhibitor of 0.4 mass parts, the synthesizing ester softening agent of 7 mass parts and the Di Cumyl Peroxide 99 of 0.3 mass parts to make as raw material; Said synthesizing ester softening agent is that 1: 2.5 DOP and tributoxyethyl phosphate formed by mass ratio; Said superpolymer is that 1: 1.5: 3 thermoplastic styrene butadiene rubber SBS, hydrogenation thermoplastic styrene butadiene rubber SEBS and styrene butadiene rubber sbr formed by mass ratio; Said inhibitor is a pentaerythritol tetrathioglycollate.
Above-mentioned high-elastic modified asphalt preparation method, carry out according to the following steps:
Above-mentioned matrix pitch is warming up to 180 ℃; Add above-mentioned superpolymer, inhibitor, synthesizing ester softening agent successively; Molten expand 30-60 minute (preferred swelling 45 minutes); Use colloidal mill high speed shear 1-4 all over (preferred 3 times) then, add above-mentioned stablizer at last, promptly got in high-speed stirring 1-4 hour.
The present invention has following beneficial effect:
The high-elastic modifying asphalt of the present invention is prepared into asphalt and is particularly suitable for paving steel bridge deck usefulness; Guaranteeing under the situation that the modifying asphalt high-temperature behavior can significantly not reduce; Improved the anti-low-temperature deformation ability and the anti-fatigue performance of modifying asphalt greatly: 5 ℃ of ductilities of the high-elastic modifying asphalt of the present invention are compared common modifying asphalt and have been improved about 2-3 doubly; And ℃ low-temperature bending ultimate strain of the compound of the high-elastic modifying asphalt of the present invention more conventional modified asphalt mixture-10 has improved nearly one times, fatigue lifetime and has improved more than 5 times, has obviously prolonged the steel bridge deck asphalt compound and has mated formation the time that cracking takes place.In confirmatory experiment, common modified asphalt SMA is used for Steel Bridge Pavement just the disease that ftractures can occur about 3 years, and the SMA paving steel bridge deck that adopts high-elastic modifying asphalt at present the longest working life reach 6 years, full-bridge is not seen any cracking disease yet; Excellent combination properties such as while modifying asphalt anti-water damage ability of the present invention, resistance of aging, it has effectively prolonged the paving steel bridge deck life-span of the compound that has used modifying asphalt of the present invention; In nearly 10 Steel Bridge Pavement, in the application experiment, use none paving steel bridge deck of asphalt of the high-elastic modifying asphalt prescription of the present invention the cracking disease to occur at present domestic.
Embodiment
Below come the concrete the present invention of elaboration through embodiment.
Embodiment 1
Extra large 70# matrix pitch among the 1000g is warming up to 180 ℃; Add 40gSBS, 20gSBR (superpolymer), 4g p phenylenediamine type antioxidant (inhibitor), 50g diphenyl octyl phospbate (softening agent), 30g Witcizer 300 (softening agent) successively; Molten expanding 60 minutes; Use the colloidal mill high speed shear then 2 times, add 3g sulphur at last, high-speed stirring 3 hours.
Common modifying asphalt modified technique and prescription are that extra large 70# matrix pitch among the 1000g is warming up to 180 ℃, add 60gSBS, and molten expanding 60 minutes used the colloidal mill high speed shear 2 times then, adds 3g sulphur at last, and high-speed stirring made in 3 hours.
The common modifying asphalt of table 1 and each index comparison sheet of embodiment 1 modifying asphalt
Common modifying asphalt of table 2 and embodiment 1 modifying asphalt are used for paving steel bridge deck surface layer SMA10 mixture performance comparison sheet
Annotate: low-temperature bending test sample dimensions: 300 * 100 * 50mm
Test result from above table 1, table 2 is seen; Each item detected result of the high-elastic modifying asphalt that embodiment 1 makes meets each item index request; No matter the high-elastic modifying asphalt that embodiment 1 makes is bituminous cements aspect or asphalt aspect, and its fatigue property and low-temperature deformation ability all are greatly improved than common modifying asphalt.
Embodiment 2-10 makes by following, and all the other are with embodiment 1.
Record above-mentioned each performance index of high-elastic modifying asphalt such as table 3,4:
Table 3
Table 4
Claims (10)
1. high-elastic modifying asphalt, it is characterized in that: it is that raw material makes with matrix pitch, superpolymer, inhibitor, synthesizing ester softening agent and stablizer; Said synthesizing ester softening agent is one or more arbitrary combination in Witcizer 300, dihexyl phthalate, DOP, diphenyl octyl phospbate, trioctyl phosphate or the tributoxyethyl phosphate.
2. high-elastic modifying asphalt as claimed in claim 1; It is characterized in that: the consumption of said each raw material is: matrix pitch is that 100 parts, superpolymer are that 3-20 part, inhibitor are that 0.2-2 part, synthesizing ester softening agent are that 3-20 part, stablizer are 0.1-1 part, in mass parts.
3. high-elastic modifying asphalt as claimed in claim 2; It is characterized in that: the consumption of said each raw material is: matrix pitch is that 100 parts, superpolymer are that 5-9 part, inhibitor are that 0.3-1 part, synthesizing ester softening agent are that 6-9 part, stablizer are 0.2-0.4 part, in mass parts.
4. high-elastic modifying asphalt as claimed in claim 3 is characterized in that: said synthesizing ester softening agent is that DOP and the tributoxyethyl phosphate of 1:2.5 formed by mass ratio.
5. like each described high-elastic modifying asphalt of claim 1～4, it is characterized in that: said matrix pitch is that road is with straight-run 70# or 90# matrix pitch.
6. high-elastic modifying asphalt as claimed in claim 5 is characterized in that: said inhibitor is one or more arbitrary combination in pentaerythritol tetrathioglycollate, β-propionic acid octadecanol ester, Tyox B, the NSC 65881 diphosphites; The consumption of said each raw material is: 100 parts of matrix pitches, 7 parts of superpolymer, 0.4 part of inhibitor, 7 parts in synthesizing ester softening agent, 0.3 part of stablizer, and in mass parts.
7. like claim 5 or 6 described high-elastic modifying asphalts, it is characterized in that: said superpolymer is one or more arbitrary combination in thermoplastic styrene butadiene rubber SBS, hydrogenation thermoplastic styrene butadiene rubber SEBS, the styrene butadiene rubber sbr.
8. high-elastic modifying asphalt as claimed in claim 7 is characterized in that: said superpolymer is that thermoplastic styrene butadiene rubber SBS, hydrogenation thermoplastic styrene butadiene rubber SEBS and the styrene butadiene rubber sbr of 1:1.5:3 formed by mass ratio; Said stablizer is sulphur or Di Cumyl Peroxide 99.
9. high-elastic modifying asphalt as claimed in claim 1, it is that road with 100 mass parts uses straight-run 70# or 90# matrix pitch, the superpolymer of 7 mass parts, the inhibitor of 0.4 mass parts, the synthesizing ester softening agent of 7 mass parts and the Di Cumyl Peroxide 99 of 0.3 mass parts to make as raw material; Said synthesizing ester softening agent is that DOP and the tributoxyethyl phosphate of 1:2.5 formed by mass ratio; Said superpolymer is that thermoplastic styrene butadiene rubber SBS, hydrogenation thermoplastic styrene butadiene rubber SEBS and the styrene butadiene rubber sbr of 1:1.5:3 formed by mass ratio; Said inhibitor is a pentaerythritol tetrathioglycollate.
10. like each described high-elastic modified asphalt preparation method of claim 1～9, carry out according to the following steps:
Described matrix pitch is warming up to 180 ℃; Add described superpolymer, inhibitor, synthesizing ester softening agent successively; Molten expand 30-60 minute (preferred swelling 45 minutes); Use colloidal mill high speed shear 1-4 all over (preferred 3 times) then, add above-mentioned stablizer at last, promptly got in high-speed stirring 1-4 hour.
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| CN 201110305718 CN102408734B (en) | 2011-10-11 | 2011-10-11 | High-elastic modified asphalt and preparation method thereof |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102660127A (en) * | 2012-05-28 | 2012-09-12 | 河南现代交通道路科技有限责任公司 | Colored modified asphalt and preparation method thereof |
| CN102898851A (en) * | 2012-11-12 | 2013-01-30 | 天津市恒悦化工有限公司 | Styrene butadiene styrene (SBS) high-performance modified asphalt and preparation method thereof |
| CN104151844A (en) * | 2014-08-06 | 2014-11-19 | 中南大学 | Cationic modified emulsified asphalt and application thereof in slab ballastless track |
| CN104194365A (en) * | 2014-09-11 | 2014-12-10 | 广西国创道路材料有限公司 | Compound SBS (styrene butadiene styrene) modified asphalt and production process thereof |
| CN105238080A (en) * | 2014-07-12 | 2016-01-13 | 卢桂才 | Reactive type modified asphalt and production method therefor |
| CN105838095A (en) * | 2016-05-30 | 2016-08-10 | 中海沥青（四川）有限公司 | High-elastic modified asphalt and preparation method thereof |
| CN107722654A (en) * | 2017-10-31 | 2018-02-23 | 长安大学 | A kind of composite modified asphalt and preparation method thereof |
| CN108440980A (en) * | 2018-03-30 | 2018-08-24 | 佛山市路邦沥青有限公司 | A kind of preparation method of the modified pitch of good combination property |
| CN109627797A (en) * | 2018-12-28 | 2019-04-16 | 中南林业科技大学 | Useless edible soybean oil and the composite regenerated pitch of graphene oxide and preparation method thereof |
| CN109722047A (en) * | 2019-02-22 | 2019-05-07 | 湖南鑫长胜材料科技有限公司 | A kind of high-viscosity high-elasticity modified pitch and preparation method |
| CN111978750A (en) * | 2020-09-08 | 2020-11-24 | 福州大学 | High-toughness SBS/SBR polyphosphoric acid composite modified asphalt and preparation method thereof |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102660127A (en) * | 2012-05-28 | 2012-09-12 | 河南现代交通道路科技有限责任公司 | Colored modified asphalt and preparation method thereof |
| CN102898851A (en) * | 2012-11-12 | 2013-01-30 | 天津市恒悦化工有限公司 | Styrene butadiene styrene (SBS) high-performance modified asphalt and preparation method thereof |
| CN105238080A (en) * | 2014-07-12 | 2016-01-13 | 卢桂才 | Reactive type modified asphalt and production method therefor |
| CN104151844B (en) * | 2014-08-06 | 2016-10-05 | 中南大学 | A kind of cationic emulsified modified asphalt and the application in plate-type ballastless track |
| CN104151844A (en) * | 2014-08-06 | 2014-11-19 | 中南大学 | Cationic modified emulsified asphalt and application thereof in slab ballastless track |
| CN104194365A (en) * | 2014-09-11 | 2014-12-10 | 广西国创道路材料有限公司 | Compound SBS (styrene butadiene styrene) modified asphalt and production process thereof |
| CN104194365B (en) * | 2014-09-11 | 2016-01-20 | 广西国创道路材料有限公司 | A kind of composite SBS modifying asphalt and production technique thereof |
| CN105838095A (en) * | 2016-05-30 | 2016-08-10 | 中海沥青（四川）有限公司 | High-elastic modified asphalt and preparation method thereof |
| CN107722654A (en) * | 2017-10-31 | 2018-02-23 | 长安大学 | A kind of composite modified asphalt and preparation method thereof |
| CN108440980A (en) * | 2018-03-30 | 2018-08-24 | 佛山市路邦沥青有限公司 | A kind of preparation method of the modified pitch of good combination property |
| CN109627797A (en) * | 2018-12-28 | 2019-04-16 | 中南林业科技大学 | Useless edible soybean oil and the composite regenerated pitch of graphene oxide and preparation method thereof |
| CN109722047A (en) * | 2019-02-22 | 2019-05-07 | 湖南鑫长胜材料科技有限公司 | A kind of high-viscosity high-elasticity modified pitch and preparation method |
| CN111978750A (en) * | 2020-09-08 | 2020-11-24 | 福州大学 | High-toughness SBS/SBR polyphosphoric acid composite modified asphalt and preparation method thereof |
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