CN102585525A - SBS (styrene-butadiene-styrene) modified asphalt with stable thermal storage and preparation process thereof - Google Patents
SBS (styrene-butadiene-styrene) modified asphalt with stable thermal storage and preparation process thereof Download PDFInfo
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- CN102585525A CN102585525A CN2012100088899A CN201210008889A CN102585525A CN 102585525 A CN102585525 A CN 102585525A CN 2012100088899 A CN2012100088899 A CN 2012100088899A CN 201210008889 A CN201210008889 A CN 201210008889A CN 102585525 A CN102585525 A CN 102585525A
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Abstract
The invention discloses an SBS (styrene-butadiene-styrene) modified asphalt with stable thermal storage, which has significantly improved thermal storage stability and has good high-temperature and low-temperature road performance. The SBS modified asphalt is prepared by the step of adding a styrene-butadiene-styrene block copolymer, a stabilizer, a solubilizer and polyphosphate into base asphalt, wherein the weight of the styrene-butadiene-styrene block copolymer is 2-6% of the weight of the base asphalt, the weight of the stabilizer is 0.1-0.2% of the weight of the base asphalt, the weight of the solubilizer is 1-5% of the weight of the base asphalt, and the weight of polyphosphate is 0.1-1% of the weight of the base asphalt. The preparation process of the SBS modified asphalt comprises the following steps: (1) collecting base asphalt, and heating to 175-185 DEG C; (2) adding aromatic oil, and stirring for 40-80 seconds; (3) adding styrene-butadiene-styrene block copolymer, and shearing for 8-12 minutes; (4) adding sulfur powder, and shearing for 8-12 minutes; and (5) adding polyphosphate, and developing under stirring for 100-140 minutes to obtain the SBS modified asphalt with stable thermal storage.
Description
Technical field
The present invention relates to a kind of SBS modifying asphalt and preparation technology thereof of steady heat storage.
Background technology
The SBS modifying asphalt is owing to have good high temperature performance, and can improve bituminous ageing resistance and fatigue resistance, become the principal item of China's modifying asphalt at present.But; There are bigger difference in SBS properties-correcting agent and pitch aspect physics such as molecular weight, density and chemical property, cause both consistencies relatively poor, and the SBS modifying asphalt is in the thermmal storage process; The segregation demixing phenomenon occurs through regular meeting, influence the modifying asphalt quality and use with normal.
The adding stablizer can improve the stability in storage of SBS modifying asphalt, like sulphur and compound thereof, mainly plays the effect of linking agent, and it is crosslinked that SBS is taken place, and forms the space reticulated structure.Though but many times the adding of stablizer can be played a role, but still can not make SBS compatible with matrix pitch, the stable storing type of modifying asphalt is still defective.
Because SBS absorbs oil and melts bloated in pitch; Volume can enlarge several times; Help SBS in pitch dispersion and form the space reticulated structure, the isolating speed that slows down, thus the component of its stability in storage and matrix pitch particularly aromatic hydrocarbons divide content relevant; Add solubilizing agent, can improve the stability in storage of SBS modifying asphalt like aromatic hydrocarbon oil.But the adding of aromatic hydrocarbon oil reduces bituminous viscosity degradation, softening temperature, and penetration degree raises, and has satisfied not " asphalt highway construction technique normalizing " technical requirements (JTGF40-2004) probably.Simultaneously, the high-temperature behavior of modifying asphalt significantly reduces, and makes bituminous pavement face the threat that high-temperature stability aspect diseases such as rut occur.
In sum, be badly in need of a kind of good hot storage stability that both had, can keep simultaneously the modifying asphalt of good high low temperature pavement performance again.
Summary of the invention
To above-mentioned prior art, the invention provides a kind of SBS modifying asphalt of steady heat storage, modifying asphalt of the present invention has improved the bituminous hot storage stability, has good high low temperature pavement performance simultaneously.
The present invention realizes through following technical scheme:
A kind of SBS modifying asphalt of steady heat storage; Be to be prepared from through in matrix pitch, adding styrene-butadiene-styrene block copolymer (SBS), stablizer, solubilizing agent and polyphosphoric acid; Said styrene-butadiene-styrene block copolymer weight is 2～6% of matrix pitch weight; Stablizer weight is 0.1～0.2% of matrix pitch weight, and solubilizing agent weight is 1～5% of matrix pitch weight, and polyphosphoric acid weight is 0.1～1% of matrix pitch weight.
Preferably, said stablizer is the sulphur powder, or other has the compound of the sulphur of crosslinked action.
Preferably, said solubilizing agent is that aromatic hydrocarbon rubber oil is or/and naphthenic hydrocarbon rubber is oily.
The preparation technology of the SBS modifying asphalt of said steady heat storage, step is:
(1) gets matrix pitch, be heated to 175～185 ℃;
(2) add aromatic hydrocarbon oil, stirred 40～80 seconds;
(3) add styrene-butadiene-styrene block copolymer, sheared 8～12 minutes;
(4) add the sulphur powder, sheared 8～12 minutes;
(5) add polyphosphoric acid, stir and grew 100～140 minutes, promptly get the SBS modifying asphalt of steady heat storage.
In said step (2), (5), stirring velocity is 60～80 revolutions per seconds.
In said step (3), (4), velocity of shear is 6000～7000 revolutions per seconds.
The SBS modifying asphalt of steady heat storage of the present invention has obviously improved the bituminous hot storage stability, has good high low temperature pavement performance simultaneously, has following advantage:
1, polyphosphoric acid can carry out the basic group in the pitch and SBS crosslinkedly, plays inhibition thereby can separate with bituminous SBS.
2, polyphosphoric acid carries out the basic group in the pitch and SBS crosslinked, has improved the performance of modifying asphalt, can improve softening temperature, reduces penetration degree.Reaching under the situation of identical index request, can reduce the SBS addition content.Because the polyphosphoric acid price is lower than SBS, this can reduce cost.And, make the steady heat storage property improvement of SBS modifying asphalt because the minimizing of SBS volume can make SBS absorb the oil content in the more pitch.
3, add aromatic hydrocarbons wet goods solubilizing agent bituminous viscosity degradation, softening temperature are reduced, penetration degree raises, and ductility improves; And add polyphosphoric acid the bituminous softening temperature is improved; Penetration degree reduces, and ductility reduces, so adjust the addition of the two; Can improve bituminous three big indexs comprehensively, keep good high low temperature pavement performance.
Embodiment
Below in conjunction with embodiment the present invention is further described.
The SBS modifying asphalt of embodiment 1 preparation steady heat storage
Step is following:
1, gets No. 70 matrix pitches in 1000g Shandong, be heated to 180 ℃;
2, add aromatic hydrocarbon oil 30g, stirred 1 minute;
3, add the SBS35g of 4303 models, sheared 10 minutes;
4, add sulphur powder 1.2g, sheared 10 minutes;
5, add polyphosphoric acid 5g, stir and grew 2 hours, promptly get.
Comparative Examples 1
Step is following:
1, gets No. 70 matrix pitches in 1000g Shandong, be heated to 180 ℃;
2, add the SBS40g of 4303 models, sheared 10 minutes;
3, add sulphur powder 1.2g, sheared 10 minutes;
4, stir growth 2 hours, promptly get.
Comparative Examples 2
1, gets No. 70 matrix pitches in 1000g Shandong, be heated to 180 ℃;
2, add aromatic hydrocarbon oil 30g, stirred 1 minute;
3, add the SBS40g of 4303 models, sheared 10 minutes;
4, add sulphur powder 1.2g, sheared 10 minutes;
5, stir growth 2 hours, promptly get.
Comparative Examples 3
1, gets No. 70 matrix pitches in 1000g Shandong, be heated to 180 ℃;
2, add the SBS35g of 4303 models, sheared 10 minutes;
3, add sulphur powder 1.2g, sheared 10 minutes;
4, add polyphosphoric acid 5g, stir and grew 2 hours, promptly get.
Above-mentioned stirring velocity is 80 revolutions per seconds, and velocity of shear is 6000 revolutions per seconds.
The prescription of embodiment 1 and Comparative Examples 1,2,3 thereof is relatively seen table 1:
Table 1 modifying asphalt prescription comparison sheet, the g of unit
| Comparative Examples 1 | Comparative Examples 2 | Comparative Examples 3 | Embodiment 1 | |
| No. 70 matrix pitches | 1000 | 1000 | 1000 | 1000 |
| Aromatic hydrocarbon oil | 30 | 30 | ||
| 4303SBS | 40 | 40 | 35 | 35 |
| The sulphur powder | 1.2 | 1.2 | 1.2 | 1.2 |
| Polyphosphoric acid | 5 | 5 |
The experimental test index comparing result of the modifying asphalt of embodiment 1 and Comparative Examples 1,2,3 preparations thereof is seen table 2:
Table 2 modifying asphalt experimental test index contrast table
Can find out that from table 2 Comparative Examples 1 is for only having used the prescription of stablizer, segregation is serious; Comparative Examples 2 has been added solubilizing agent, though segregation improves, penetration degree exceeds code requirement; Polyphosphoric acid is added in contrast 3, and reduces the SBS volume, and segregation makes moderate progress, but the not enough code requirement of ductility; Embodiment 1 segregation is very little, satisfies code requirement, and each item index is relatively more balanced, all satisfies code requirement.
Embodiment 2
Step is following:
1, gets No. 70 matrix pitches of 1000g shoreization, be heated to 180 ℃;
2, add aromatic hydrocarbon oil 40g, stirred 1 minute;
3, add the SBS45g of 1301 models, sheared 8 minutes;
4, add sulphur powder 1.5g, sheared 8 minutes;
5, add polyphosphoric acid 3g, stir and grew 140 minutes, promptly get.
Above-mentioned stirring velocity is 60 revolutions per seconds, and velocity of shear is 7000 revolutions per seconds.
The experimental test index result of the modifying asphalt of embodiment 2 preparations sees table 3:
Table 3 modifying asphalt experimental test index table
| Index | Unit | Test-results | Technical requirements I-D |
| Penetration degree (25 ℃, 100g, 5s) | 0.1mm | 51 | 40～60 |
| Ductility (5 ℃, 5cm/min) | cm | 29 | ≮20 |
| Softening temperature (R&B) | ℃ | 75 | ≮60 |
| Segregation (the 48h softening temperature is poor) | ℃ | 2 | ≯2.5 |
Embodiment 2 uses be penetration degree less, with No. 70 relatively poor matrix pitches of SBS properties-correcting agent consistency, SBS properties-correcting agent uses and bitumen compatibility line style 1301 type SBS preferably, uses the indexs such as SBS modifying asphalt segregation of embodiment 2 to satisfy code requirement.
Embodiment 3
Step is following:
1, gets 1000g Korea S SK70 matrix pitch, be heated to 180 ℃;
2, add aromatic hydrocarbon oil 20g, stirred 1 minute;
3, add the SBS30g of 4303 models, sheared 12 minutes;
4, add sulphur powder 1.1g, sheared 12 minutes;
5, add polyphosphoric acid 7g, stir and grew 2 hours, promptly get.
Above-mentioned stirring velocity is 70 revolutions per seconds, and velocity of shear is 6500 revolutions per seconds.
The experimental test index result of the modifying asphalt of embodiment 3 preparations sees table 4:
Table 4 modifying asphalt experimental test index table
| Index | Unit | Test-results | Technical requirements I-D |
| Penetration degree (25 ℃, 100g, 5s) | 0.1mm | 57 | 40～60 |
| Ductility (5 ℃, 5cm/min) | cm | 32 | ≮20 |
| Softening temperature (R&B) | ℃ | 67 | ≮60 |
| Segregation (the 48h softening temperature is poor) | ℃ | 1 | ≯2.5 |
Embodiment 3 uses be penetration degree big, with SBS properties-correcting agent consistency No. 70 matrix pitches preferably, use the indexs such as SBS modifying asphalt segregation of embodiment 3 to satisfy code requirement.
Embodiment 4
Step is following:
1, gets 1000g Korea S SK90 matrix pitch, be heated to 175 ℃;
2, add aromatic hydrocarbon oil 30g, stirred 1 minute;
3, add the SBS40g of 4303 models, sheared 12 minutes;
4, add sulphur powder 1.2g, sheared 8 minutes;
5, add polyphosphoric acid 4g, stir and grew 2 hours, promptly get.
Above-mentioned stirring velocity is 80 revolutions per seconds, and velocity of shear is 7000 revolutions per seconds.
The experimental test index result of the modifying asphalt of embodiment 4 preparations sees table 5:
Table 5 modifying asphalt experimental test index table
| Index | Unit | Test-results | Technical requirements I-C |
| Penetration degree (25 ℃, 100g, 5s) | 0.1mm | 72 | 60～80 |
| Ductility (5 ℃, 5cm/min) | cm | 44 | ≮30 |
| Softening temperature (R&B) | ℃ | 73 | ≮55 |
| Segregation (the 48h softening temperature is poor) | ℃ | 1.5 | ≯2.5 |
What embodiment 4 used is No. 90 matrix pitches, uses the indexs such as SBS modifying asphalt segregation of embodiment 4 to satisfy code requirement.
Claims (7)
1. the SBS modifying asphalt of a steady heat storage; It is characterized in that: be to be prepared from through in matrix pitch, adding styrene-butadiene-styrene block copolymer, stablizer, solubilizing agent and polyphosphoric acid; Said styrene-butadiene-styrene block copolymer weight is 2～6% of matrix pitch weight; Stablizer weight is 0.1～0.2% of matrix pitch weight, and solubilizing agent weight is 1～5% of matrix pitch weight, and polyphosphoric acid weight is 0.1～1% of matrix pitch weight.
2. the SBS modifying asphalt of a kind of steady heat storage according to claim 1, it is characterized in that: said stablizer is that sulphur is or/and the compound of sulphur.
3. the SBS modifying asphalt of a kind of steady heat storage according to claim 1, it is characterized in that: said solubilizing agent is that aromatic hydrocarbon rubber oil is or/and naphthenic hydrocarbon rubber is oily.
4. the SBS modifying asphalt of a kind of steady heat storage according to claim 1; It is characterized in that: said styrene-butadiene-styrene block copolymer weight is 3.5% of matrix pitch weight; Stablizer weight is 0.12% of matrix pitch weight; Solubilizing agent weight is 3% of matrix pitch weight, and polyphosphoric acid weight is 0.5% of matrix pitch weight; Said matrix pitch is No. 70 matrix pitches, and said styrene-butadiene-styrene block copolymer is the SBS of 4303 models, and said stablizer is the sulphur powder, said solubilizing agent aromatic hydrocarbon oil.
5. the preparation technology of the SBS modifying asphalt of each described a kind of steady heat storage in the claim 1～4, it is characterized in that: step is:
(1) gets matrix pitch, be heated to 175～185 ℃;
(2) add aromatic hydrocarbon oil, stirred 40～80 seconds;
(3) add styrene-butadiene-styrene block copolymer, sheared 8～12 minutes;
(4) add the sulphur powder, sheared 8～12 minutes;
(5) add polyphosphoric acid, stir and grew 100～140 minutes, promptly get the SBS modifying asphalt of steady heat storage.
6. preparation technology according to claim 5 is characterized in that: in said step (2), (5), stirring velocity is 60～80 revolutions per seconds.
7. preparation technology according to claim 5 is characterized in that: in said step (3), (4), velocity of shear is 6000～7000 revolutions per seconds.
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| CN103232713A (en) * | 2013-05-03 | 2013-08-07 | 中海油（青岛）重质油加工工程技术研究中心有限公司 | Large-aperture permeable asphalt and preparation method thereof |
| CN103305014A (en) * | 2013-05-06 | 2013-09-18 | 中海油（青岛）重质油加工工程技术研究中心有限公司 | SBS (stimulated brillouin scattering) modified asphalt and preparation method thereof |
| CN103396670A (en) * | 2013-07-11 | 2013-11-20 | 河海大学 | Waterproof modified asphalt for dam asphalt well and preparation method thereof |
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Application publication date: 20120718 |