CN1206283C - Modified asphalt for road and its preparation method - Google Patents
Modified asphalt for road and its preparation method Download PDFInfo
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- CN1206283C CN1206283C CN 02144536 CN02144536A CN1206283C CN 1206283 C CN1206283 C CN 1206283C CN 02144536 CN02144536 CN 02144536 CN 02144536 A CN02144536 A CN 02144536A CN 1206283 C CN1206283 C CN 1206283C
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- asphalt
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Abstract
The present invention relates to modified asphalt for roads and a preparation method thereof. The modified asphalt comprises the components of high molecular wax, high molecular elastomer, vulcanizer and basis asphalt. The polymer modified road asphalt of the present invention has the advantages of high softening point, good construction properties and good service performance. The polymer modified road asphalt not only accords with technical requirements of usual road modified asphalt, but also can satisfy requirements of material with high softening point in specific road construction.
Description
1, technical field
The invention relates to modifying asphalt and preparation method thereof, particularly about a kind of high softening-point road modifying asphalt and preparation method thereof.
2, background technology
Styrene-butadiene-styrene block copolymer (SBS) modifying asphalt is used matrix material as a kind of building the road, and is mainly used in the advanced road engineering construction.Compare with ordinary road pitch, its susceptibility to temperature has had tangible improvement, shows that mainly the softening temperature index is significantly improved.In the asphalt for high-grade highway technical specifications, softening temperature is the highest to be defined as 55 ℃, and in the standard of modifying asphalt, softening temperature can be higher than 60 ℃, make modifying asphalt as building the road matrix material, under higher road environment temperature, can keep higher viscosity, be difficult for taking place to flow, kept the stable of road deck material structure more effectively, what solved the bituminous pavement summer high temperature phase preferably flows, gathers around disease such as bag.Industry wishes that the polymer modified asphalt material has under the prerequisite of workability and use properties preferably so build the road, the softening temperature index with height for well.In specific area, in the specific highway engineering construction, even explicitly call for softening temperature to be greater than 70 ℃.
On the other hand, along with the popularization and application of modifying asphalt, people are also strengthening gradually to the demand of the finished product asphaltum that batch production is produced.So-called finished product asphaltum, the product of modifying asphalt being made stable performance in pitch factory is stored exactly, treat to dispatch from the factory again when the user needs, rather than the sort of in the past modified bitumen product of producing and using at once at the scene.
Because finished product asphaltum need be stored the purchase of waiting for the user in hold tank,, make it not take place that polymkeric substance is emanated with pitch, layering then is the prerequisite of finished product asphaltum production at lay up period so guarantee the package stability of modifying asphalt.Relevant at present patent has CN98805702.6, CN01113264.7, CN01113263.9.
Have good storage stability in order to ensure finished product asphaltum, the manufacturer tend to select for use with the basic asphalt intermiscibility preferably the SBS of low-molecular-weight linear structure carry out the production of finished product asphaltum.Yet because this SBS is to the raising DeGrain of modifying asphalt softening temperature, so the softening temperature index of most finished product asphaltums is lower.In order to pursue the high softening-point index, people get used to strengthening the consumption of polymkeric substance, wish the softening temperature of modifying asphalt is increased.Yet experiment shows that every increase 1%SBS, softening temperature improve about 2～3 ℃, and effect is also not obvious, on the contrary 135 ℃ of viscosity of modifying asphalt is increased to some extent, also makes to promote SBS dispersive oil content to trend towards deficiency in the modifying asphalt system, and the stability of system weakens.
3, summary of the invention
The objective of the invention is polymer modification road bitumen that proposes a kind of softening temperature height, good stability and preparation method thereof.
Polymer modification road bitumen of the present invention comprises basic asphalt and properties-correcting agent, comprises in the concrete composition of weight part:
100 parts of basic asphalts,
1～9 part of SBS,
0.01～0.40 part of vulcanizing agent,
0.1～2.0 part of macromolecule wax.
Wherein, the basic asphalt material mainly is that penetration degree is 90～200 oil heavy distillate or finished product pitch, the vulcanizing agent major ingredient is sulphur and sulfide, macromolecule wax can be polyethylene wax, the Poly Propylene Wax that cracking technology, oxidizing process or polymerization technique obtain, or both mixtures, its molecular weight is 1000～6000, and preferable amount is 0.5～1.5 part.The SBS molecular weight is generally 60000～300000.
The preparation process of polymer modification road bitumen of the present invention is:
With macromolecule wax, SBS, vulcanizing agent and basic asphalt mix by machinery under 120～190 ℃ of conditions and convert equipment and be mixed into homogeneous system, and 160～180 ℃ of reactions 20～180 minutes down, make polymer modification road bitumen of the present invention.It is raw material that the present invention also can adopt the SBS modified pavement asphalt, by mechanical mixing equipment itself and macromolecule wax is mixed under 120～190 ℃, obtains modified pavement asphalt of the present invention.
The general knowledge of this area is thought, wax in the petroleum pitch, it is the undesirable components of road bitumen material, increase with its content, will aggravate the generation of the cold short phenomenon of hot-fluid of bituminous material, show that mainly the bituminous softening temperature descends, low-temperature ductility can not satisfy the requirement of specific targets, makes bituminous material be tending towards responsive to temperature.And the contriver finds in the development process of secular petroleum pitch and modifying asphalt, and the wax of different structure, different sources is also different to the influence of bituminous material.Therefore in the triturating of high softening-point modifying asphalt, introduce the macromolecule wax class material of synthetic audaciously, the result shows, as long as the add-on of macromolecule wax is controlled at certain scope, when making it low-temperature ductility and still can satisfy index request, can improve its softening temperature index effectively, suppress the increase of 135 ℃ of viscosity, make modified bitumen product have workability, use properties preferably simultaneously.
4, embodiment
Embodiment one
To two parts of temperature is that to add molecular weight in No. 70 pitches of 1000 grams of 160 ℃ shown in the according to the form below be that 1000～2000 polyethylene wax, molecular weight are 140000～160000 SBS, sulphur, convert machine shearing, stirring after 50 minutes with the high-shear of dicyclo type is mixed, the material that obtains 180 ℃ of following standing and reacting 120 minutes, is promptly obtained finished product asphaltum.Main performance index is shown in data in the following table.
| Comparative Examples 1 | Embodiment 1 | Index request | |
| Basic asphalt macromolecule wax add-on, gram SBS add-on, the gram vulcanizing agent, gram | No. 70 pitches 0 50 1 | No. 70 pitches 10 40 1 | |
| 5 ℃ of softening points of 25 ℃ of needle penetration 1/10mm ductilities ℃ 135 ℃ of viscosity Pa.s bin stabilities; Softening point difference, ductility (5 ℃) behind ℃ elasticity recovery (25 ℃) % rotary thin film in drying oven test mass loss % penetration ratio % film | 55 40 60 1.50 0.6 77 0.15 81.8 21 | 48 32 65 1.40 0.6 75 0.10 82.6 18 | ＞40 ＞20 ＞60 ＜2 ＜2.5 ＞70 ＜1.0 ＞65 ＞15 |
Embodiment two
To two parts of temperature is that to add molecular weight in No. 90 pitches of 1000 grams of 160 ℃ shown in the according to the form below be that 3000～4000 Poly Propylene Wax, molecular weight are 160000～250000 SBS, thiuram-disulfide, convert machine shearing, stirring after 50 minutes with the high-shear of dicyclo type is mixed, the material that obtains 180 ℃ of following standing and reacting 120 minutes, is promptly obtained the finished product asphaltum product.Main performance index is shown in data in the following table.
| Comparative Examples 2 | Embodiment 2 | Index request | |
| Basic asphalt macromolecule wax add-on, gram SBS add-on, the gram vulcanizing agent, gram | No. 90 pitches 0 60 1 | No. 90 pitches 7 50 1 | |
| 5 ℃ of softening points of 25 ℃ of needle penetration 1/10mm ductilities ℃ 135 ℃ of viscosity Pa.s bin stabilities; Softening point difference, ductility (5 ℃) behind ℃ elasticity recovery (25 ℃) % rotary thin film in drying oven test mass loss % penetration ratio % film | 55 60 69 1.95 0.7 93 0.05 80.8 40 | 53 42 77 1.80 0.6 86 0.07 76.9 25 | ＞40 ＞20 ＞60 ＜2 ＜2.5 ＞70 ＜1.0 ＞65 ＞15 |
Claims (5)
1, a kind of macromolecule wax is improving road with the purposes in the modifying asphalt softening temperature, comprises in the composition of weight part modifying asphalt:
100 parts of basic asphalts,
1～9 part of SBS,
0.01～0.40 part of vulcanizing agent,
0.1～2.0 part of macromolecule wax.
2,, it is characterized in that described basic asphalt is that penetration degree is 90～200 oil heavy distillate or finished product pitch according to the described purposes of claim 1.
3,, it is characterized in that described vulcanizing agent is mainly sulphur and sulfide according to the described purposes of claim 1.
4,, it is characterized in that described macromolecule wax is polyethylene wax, the Poly Propylene Wax that cracking technology, oxidizing process or polymerization technique obtain according to the described purposes of claim 1.
5, according to claim 1 or 4 described purposes, the molecular weight that it is characterized in that described macromolecule wax is 1000～6000.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02144536 CN1206283C (en) | 2002-11-02 | 2002-11-02 | Modified asphalt for road and its preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02144536 CN1206283C (en) | 2002-11-02 | 2002-11-02 | Modified asphalt for road and its preparation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1493619A CN1493619A (en) | 2004-05-05 |
| CN1206283C true CN1206283C (en) | 2005-06-15 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02144536 Expired - Lifetime CN1206283C (en) | 2002-11-02 | 2002-11-02 | Modified asphalt for road and its preparation method |
Country Status (1)
| Country | Link |
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| CN (1) | CN1206283C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102040846B (en) * | 2009-10-16 | 2012-09-12 | 中国石油化工股份有限公司 | Oil-resistant asphalt pavement material and preparation method thereof |
| CN105130280B (en) * | 2015-08-19 | 2018-04-03 | 东南大学 | A kind of rubber-asphalt mixture |
| 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 |
| CN110845857B (en) * | 2019-11-19 | 2021-02-12 | 华东理工大学 | High-performance special SBS (styrene butadiene styrene) modified asphalt and preparation method thereof |
| CN112759939A (en) * | 2020-12-29 | 2021-05-07 | 亿虎控股有限公司 | High-modulus modified asphalt and production method thereof |
-
2002
- 2002-11-02 CN CN 02144536 patent/CN1206283C/en not_active Expired - Lifetime
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| Publication number | Publication date |
|---|---|
| CN1493619A (en) | 2004-05-05 |
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