CN103305015B - Warm mix high-elastic plasticity bridge expanssion joint seam sealer and preparation method - Google Patents
Warm mix high-elastic plasticity bridge expanssion joint seam sealer and preparation method Download PDFInfo
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- CN103305015B CN103305015B CN201310209376.9A CN201310209376A CN103305015B CN 103305015 B CN103305015 B CN 103305015B CN 201310209376 A CN201310209376 A CN 201310209376A CN 103305015 B CN103305015 B CN 103305015B
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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
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Abstract
The invention discloses a kind of warm mix high-elastic plasticity bridge expanssion joint seam sealer and preparation method.This seam sealer comprises following composition: petroleum pitch: vinylbenzene-butadiene block polymkeric substance (SBS): styrene-butadiene rubber(SBR) (SBR): resin: stablizer: warm-mixing agent=100:3-10:1-5:0-10:2-6:1-5.Described resin is petroleum resin or Gum Rosin, and described stablizer is sulphur and TOR rubber stabilizer mixture, and ratio is: sulphur: TOR=4:1-2.The feature of the seam sealer that this formula obtains is: warm mix type modified asphalt material, high-temperature stable, low temperature cracking resistance, and viscosifying power is good, has good elastic recovery capability simultaneously.
Description
Technical field
The invention belongs to material of construction, relate to a kind of warm mix type high elasticity modified asphalt, be mainly used in the elasticity of pitch and reduce the construction temperature of pitch, being applicable to the bridge expanssion joint seam sealer of bridge gapless.
Background technology
Warm mix technology is by adding certain additive or adopt special technology to make the mix degree of asking of pitch reduce in pitch.Warm-mixed asphalt is compared with traditional asphalt, and construction temperature can decline 30 ~ 60 DEG C.The reduction of bitumen construction temperature, not only can reduce energy consumption during production, reduces the quantity discharged of the waste gas such as carbonic acid gas, flue dust, effectively protects surrounding environment, can also protect that workmen's is healthy, extends the work-ing life of construction equipment.
Expansion joint is between adjacent beams and the retractor device that arranges between beam-ends and abutment parados, and its Main Function ensures that bridge structure thing can free deformation under the effects such as temperature, humidity, load, provides smooth-going, comfortable surface for vehicle travels.The scientific design at expansion joint, well construction and maintenance are in time safe, quick, the comfortable bases ensureing transport by road, also directly affect the work-ing life of bridge structure simultaneously.Gapless retractor device, by inserting highly elastic material, can meet the flexible requirement of bridge, has again good road-ability simultaneously, is used widely in recent years.But, pointing requires to have good elasticity, there is good viscosifying power between energy and bridge simultaneously, in recent years, there is many elastoplasticity bridge expanssion joint pointings both at home and abroad, but, there is two problems: 1. the elasticity of material does not reach requirement, be difficult to and bridge compatible deformation, thus cause the crack disease of retractor device; 2. high temperature construction is generally more than 200 DEG C, high to construction requirement.
Summary of the invention
The object of the invention is to overcome the requirement such as snappiness and high-temperature stability that plain asphalt is difficult to meet bridge expanssion joint, therefore modification is carried out to it.High elasticity modified asphalt of warm mix type provided by the invention and preparation method thereof, comparatively traditional asphalt construction temperature is low, improves the high-temperature stability of pitch, low-temperature cracking-resistance simultaneously, ageing resistance and elastic recovery capability.
Formula technique scheme disclosed by the invention:
A warm mix type high elasticity modified asphalt formula, is characterized in that, comprise following composition:
(1) petroleum pitch is major ingredient.
(2) vinylbenzene-butadiene block polymkeric substance (SBS), for properties-correcting agent, for improving the elasticity of pitch, high-temperature stability and these three kinds of pavement performances of crack resistance at low-temperature, but the too high easy segregation of volume, the viscosifying power of all right strongthener, is conducive to the interfacial adhesion between material and decking simultaneously.
(3) styrene-butadiene rubber(SBR) (SBR) is properties-correcting agent.
(4) resin is properties-correcting agent, selects petroleum resin or Gum Rosin, mainly the high-temperature stability of strongthener and rutting resistance.
(5) stablizer is sulphur and TOR rubber stabilizer mixture, wherein sulphur: TOR=4:1-2 in mass ratio.Stablizer effectively can subtract the segregation of polymkeric substance, and sulphur is generally used for the segregation preventing SBS polymkeric substance, and TOR is a kind of rubber stabilizer, is mainly used in ensureing that SBR's is stable.
(6) warm-mixing agent is organic viscosity-depression agent.Above five kinds of components mixing can obtain high viscoelastic material, but construction temperature is more than 190 DEG C, and therefore, in formula, also design adds warm-mixing agent, thus construction temperature is reduced to 135 ~ 150 DEG C, can make the direct construction usage of product.
Above-mentioned complete petroleum pitch formula, according to massfraction, vinylbenzene-butadiene block polymkeric substance (SBS): styrene-butadiene rubber(SBR) (SBR): resin: stablizer: the mass ratio of warm-mixing agent is: 100:3-10:1-5:0-10:2-6:1-5.
Based on above-mentioned formula, preparation method's technical scheme of the present invention is:
A preparation method for warm mix type high elasticity modified asphalt, it is characterized in that, step is as follows:
1, raw material prepares:
Consumption is taken according to the proportioning of various material, according to massfraction, petroleum pitch: vinylbenzene-butadiene block polymkeric substance (SBS): styrene-butadiene rubber(SBR) (SBR): resin: stablizer: warm-mixing agent=100:3-10:1-5:0-10:2-6:1-5.Described resin is petroleum resin or Gum Rosin.Described stablizer is sulphur and TOR rubber stabilizer mixture, and ratio is: sulphur: TOR=4:1-2.
2, pitch is put into 120 DEG C of insulations 1 hour, treat that pitch is liquid state.
3, heating by electric cooker is adopted, design temperature is 175 ~ 180 DEG C, by the vinylbenzene weighed up-butadiene block polymkeric substance (SBS) adds in pitch, high-speed shearing machine is adopted to carry out high speed shear, rotating speed is 1500 ~ 3000r/min, shear time is 30 ~ 45min, then adds SBR and carry out high speed shear 30 ~ 60min, adds resin and TOR rubber stabilizer shears 20 ~ 30min.
4, add in said mixture by warm-mixing agent, under 175 ~ 180 DEG C of conditions, stir 60min, add sulphur stablizer, stir 60 ~ 90min, make asphalt mixing even, bitumen construction mix temperature is 135 ~ 150 DEG C, thus, can be directly used in construction.
The pitch that the present invention obtains meets cementing material for bridge expansion joint requirement, and softening point temperature, up to 100 DEG C, has good high temperature rutting resistance; 5 DEG C of ductilities can reach 31.9cm, and illustrative material low-temperature performance comparatively plain asphalt is good; 25 degrees Celsius of elastic restoration ratios can reach 95%, and illustrative material just has good elasticity.After adding warm-mixing agent, the viscosity of pitch effectively reduces, and the elastoplasticity pitch that mix temperature is more traditional declines about 30 DEG C.
Embodiment
In order to understand the present invention better, illustrate content of the present invention further below in conjunction with embodiment, but content of the present invention is not
Only be confined to the following examples.
Embodiment 1
A kind of warm mix type high elasticity modified asphalt, comprises following composition:
70# bi tumenf orr oad: vinylbenzene-butadiene block polymkeric substance (SBS): styrene-butadiene rubber(SBR) (SBR): resin: stablizer: warm-mixing agent=100:9:4:4:3:3.Described vinylbenzene-butadiene block polymkeric substance is star-like.Described resin is petroleum resin.Described stablizer is sulphur and TOR rubber stabilizer mixture, and ratio is: sulphur: TOR=4:1.Described warm-mixing agent is Sasobit viscosity-depression agent.
1, pitch is put into 120 DEG C of insulations 1 hour, treat that pitch is liquid state.
2, heating by electric cooker is adopted, design temperature is 175 ~ 180 DEG C, by the vinylbenzene weighed up-butadiene block polymkeric substance (SBS) adds in pitch, high-speed shearing machine is adopted to carry out high speed shear, rotating speed is 1500 ~ 3000r/min, shear time is 30 ~ 45min, then adds SBR and carry out high speed shear 30 ~ 60min, adds resin and TOR rubber stabilizer shears 20 ~ 30min.
3, warm-mixing agent is added in said mixture, under 175 ~ 180 DEG C of conditions, stir 60min, add sulphur stablizer, stir 60 ~ 90min, make asphalt mixing even.
4, at 135 ~ 150 DEG C by asphalt melting, can construction be directly used in.
According to the test specimen after " highway engineering pitch and Asphalt Mixture Experiment code " (JTGE20-2011) casting, carry out performance test at an established temperature to it, the performance index obtaining pitch are as follows:
Penetration degree (40 DEG C/0.1mm): 31;
Softening temperature (25 DEG C/DEG C): 96.7 DEG C;
Ductility (5 DEG C/cm): 31.9cm;
Elastic restoration ratio (25 DEG C/%): 92%;
The aging rear mass loss of RTFOT: 0.46%.
Softening temperature is tested, and high-temperature stability is described; Ductility test illustrates low temperature anti-cracking performance; After RTFOT, residue test illustrates ageing resistance.
Embodiment 2
A kind of warm mix type high elasticity modified asphalt, comprises following composition:
70# bi tumenf orr oad: vinylbenzene-butadiene block polymkeric substance (SBS): styrene-butadiene rubber(SBR) (SBR): resin: stablizer: warm-mixing agent=100:5:4:4:3:3.Described vinylbenzene-butadiene block polymkeric substance is star-like.Described resin is petroleum resin.Described stablizer is sulphur and TOR rubber stabilizer mixture, and ratio is: sulphur: TOR=4:1.Described warm-mixing agent is Sasobit viscosity-depression agent.
1, pitch is put into 120 DEG C of insulations 1 hour, treat that pitch is liquid state.
2, heating by electric cooker is adopted, design temperature is 175 ~ 180 DEG C, by the vinylbenzene weighed up-butadiene block polymkeric substance (SBS) adds in pitch, high-speed shearing machine is adopted to carry out high speed shear, rotating speed is 1500 ~ 3000r/min, shear time is 30 ~ 45min, then adds SBR and carry out high speed shear 30 ~ 60min, adds resin and TOR rubber stabilizer shears 20 ~ 30min.
3, warm-mixing agent is added in said mixture, under 175 ~ 180 DEG C of conditions, stir 60min, add sulphur stablizer, stir 60 ~ 90min, make asphalt mixing even, cool for subsequent use.
4, at 135 ~ 150 DEG C by asphalt melting, can construction be directly used in.
Build shaping rear test specimen according to " highway engineering pitch and Asphalt Mixture Experiment code " (JTGE20-2011), carry out performance test at an established temperature to it, the performance index obtaining pitch are as follows:
Penetration degree (40 DEG C/0.1mm): 50.8;
Softening temperature (25 DEG C/DEG C): 94.6;
Ductility (5 DEG C/cm): 28.1;
Elastic restoration ratio (25 DEG C/%): 90.5;
The aging rear mass loss of RTFOT: 0.35%.
Softening temperature is tested, and high-temperature stability is described; Ductility test illustrates low temperature anti-cracking performance; After RTFOT, residue test illustrates ageing resistance.
Claims (1)
1. a product for warm mix type high elasticity modified asphalt, is characterized in that, comprises following composition:
(1) petroleum pitch is major ingredient;
(2) SBS is properties-correcting agent;
(3) styrene-butadiene rubber(SBR) (SBR) is properties-correcting agent;
(4) resin is properties-correcting agent, selects petroleum resin or Gum Rosin;
(5) stablizer is sulphur and rubber stabilizer TOR mixture, wherein sulphur: TOR=4:1-2 in mass ratio;
(6) warm-mixing agent is organic viscosity-depression agent;
Above-mentioned complete petroleum pitch formula, according to mass fraction, petroleum pitch: SBS: styrene-butadiene rubber(SBR) (SBR): resin: stablizer: the mass ratio of warm-mixing agent is:
100:3-10：1-5：0-10:2-6：1-5；
The preparation method of above-mentioned warm mix type high elasticity modified asphalt product, step is as follows:
(1) raw material prepares:
Consumption is taken according to the proportioning of various material, according to mass fraction, petroleum pitch: SBS: styrene-butadiene rubber(SBR) (SBR): resin: stablizer: warm-mixing agent=100:3-10:1-5:0-10:2-6:1-5; Described resin is petroleum resin or Gum Rosin; Described stablizer is sulphur and rubber stabilizer TOR mixture, and ratio is: sulphur: TOR=4:1-2;
(2) pitch is put into 120 DEG C of insulations 1 hour, treat that pitch is liquid state;
(3) heating by electric cooker is adopted, design temperature is 175 ~ 180 DEG C, the SBS weighed up is added in pitch, high-speed shearing machine is adopted to carry out high speed shear, rotating speed is 1500 ~ 3000r/min, shear time is 30 ~ 45min, then adds styrene-butadiene rubber(SBR) (SBR) and carry out high speed shear 30 ~ 60min, adds resin and rubber stabilizer TOR shears 20 ~ 30min;
(4) add in said mixture by warm-mixing agent, under 175 ~ 180 DEG C of conditions, stir 60min, add sulphur stablizer, stir 60 ~ 90min, make asphalt mixing even, bitumen construction mix temperature is 135 ~ 150 DEG C.
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| CN201310209376.9A CN103305015B (en) | 2013-05-30 | 2013-05-30 | Warm mix high-elastic plasticity bridge expanssion joint seam sealer and preparation method |
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| CN103305015B true CN103305015B (en) | 2016-04-06 |
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Families Citing this family (12)
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| CN104672630B (en) * | 2013-11-26 | 2017-02-08 | 比亚迪股份有限公司 | Modified ethylene propylene rubber and preparation method thereof |
| CN104177846B (en) * | 2014-07-31 | 2016-07-06 | 上海城建新路桥建设工程有限公司 | Injecting paste material, grouting method and road maintenance method for maintaining |
| CN105331329A (en) * | 2015-10-31 | 2016-02-17 | 菏泽海诺知识产权服务有限公司 | Pressure-sensitive pitch crack pouring sealant |
| CN105482477A (en) * | 2016-01-25 | 2016-04-13 | 西安公路研究院 | Super-adhesive composite modified emulsified asphalt and preparation method thereof |
| CN107513278A (en) * | 2016-06-17 | 2017-12-26 | 中国石油化工股份有限公司 | Warm mix modified pitch, contain its compound and preparation method thereof |
| CN106957534A (en) * | 2017-01-18 | 2017-07-18 | 盘锦禹王防水建材集团有限公司 | A kind of low forming temperature high-polymer modified pitch glue and preparation method thereof |
| CN107022200A (en) * | 2017-05-08 | 2017-08-08 | 云南阳光道桥股份有限公司 | Modified pitch of Rut resistance and preparation method thereof under thermal extremes fully loaded transportation condition |
| CN108948752B (en) * | 2017-05-17 | 2020-12-01 | 中路交建(北京)工程材料技术有限公司 | Special asphalt for permeable pavement, mixture containing same and preparation method |
| CN109735125A (en) * | 2019-01-14 | 2019-05-10 | 广西交通职业技术学院 | A kind of novel high-strength anti-rutting modified asphalt and preparation method thereof |
| CN110903664A (en) * | 2019-12-12 | 2020-03-24 | 长安大学 | Warm-mixed composite modified asphalt and preparation method thereof |
| CN111471309A (en) * | 2020-04-15 | 2020-07-31 | 中路高科(北京)公路技术有限公司 | Asphalt modifier and preparation method thereof, modified asphalt and preparation method thereof |
| CN112831189B (en) * | 2021-01-05 | 2022-06-17 | 长安大学 | Asphalt high-ductility cementing material, high-ductility material and preparation method |
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| CN102795809A (en) * | 2011-05-23 | 2012-11-28 | 河源海川科技有限公司 | Warm mixing styrene-butadiene-styrene (SBS) modified asphalt mixture and preparation method thereof |
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Patent Citations (4)
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| GB2472995A (en) * | 2009-08-26 | 2011-03-02 | Aggregate Ind Uk Ltd | Half-warm foamed asphalt process |
| CN102199018A (en) * | 2011-03-31 | 2011-09-28 | 许昌金欧特沥青股份有限公司 | Warm mix colored asphalt cementing material and preparation technology thereof |
| CN102795809A (en) * | 2011-05-23 | 2012-11-28 | 河源海川科技有限公司 | Warm mixing styrene-butadiene-styrene (SBS) modified asphalt mixture and preparation method thereof |
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