CN100503730C - Composite modified asphalt and its preparation method - Google Patents
Composite modified asphalt and its preparation method Download PDFInfo
- Publication number
- CN100503730C CN100503730C CNB2005100310102A CN200510031010A CN100503730C CN 100503730 C CN100503730 C CN 100503730C CN B2005100310102 A CNB2005100310102 A CN B2005100310102A CN 200510031010 A CN200510031010 A CN 200510031010A CN 100503730 C CN100503730 C CN 100503730C
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- China
- Prior art keywords
- pitch
- sbs
- composite modified
- modified asphalt
- paraffin
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- Compositions Of Macromolecular Compounds (AREA)
- Road Paving Structures (AREA)
- Working-Up Tar And Pitch (AREA)
Abstract
The invention discloses a composite modified tar material, which comprises the following parts: tar (100%), 3.0-8.0% SBS, 3.0-6.0% polypropylene wax, 0.5-6% FT and 2-8% crosslinking agent. The invention improves the compatibility of SBS and tar, which reduces 135C viscosity of modified tar to simplify the construction.
Description
Technical field
The invention belongs to a kind of composite modified asphalt material technical field.
Background technology
Add multipolymer and be used for improving bituminous performance existing decades of history.Styrene butadiene triblock copolymer SBS is present the most frequently used a kind of multipolymer that is used to improve asphalt performance.
US4145322 discloses the method for a kind of SBS of preparation (being the styrene butadiene triblock copolymer) modifying asphalt, adds heated bitumen under the temperature of 130-230C, adds SBS, and SBS is the 2%-20% of pitch weight, with sulphur as linking agent.The shortcoming of this technology is that general SBS and bituminous consistency are all relatively poor, if therefore used bitumen compatibility is relatively poor, is difficult to produce qualified modifying asphalt, and the 135C viscosity of modifying asphalt is higher simultaneously, the comparison difficulty of mixing and stirring and pave of road surface compound.
US5371121 discloses a kind of method of the SBS of preparation modifying asphalt, and it only adds the sulphur of 0.015-0.075%.This method is because the sulphur volume is too low, and used SBS volume is very high, and the storage stability of SBS modifying asphalt is also bad.
Chinese patent CN1276820A discloses the made paraffin modification pitch of employing expense-holder synthesis method, but that the shortcoming of this method is the low-temperature performance of modifying asphalt is bad, and its use is subjected to great limitation.
Summary of the invention
The objective of the invention is to propose a kind of high-temperature behavior that improves modifying asphalt, reduce the composite modified asphalt material for pavement of the 135C viscosity of modifying asphalt.
Composite modified asphalt of the present invention, form by pitch, styrene butadiene triblock copolymer (SBS), Poly Propylene Wax, FT paraffin and linking agent, wherein SBS content is 3.0%-8.0% of pitch weight, Poly Propylene Wax content is 3.0%-6.0% of pitch weight, the content of FT paraffin is the 0.5-6% of pitch weight, and content of crosslinking agent is 2%-8% of a SBS weight.
Composite modified asphalt of the present invention, wherein the content of FT paraffin is preferably the 1.0%--4% of pitch weight.
Composite modified asphalt of the present invention, wherein content of crosslinking agent is preferably the 3%-5% of Poly Propylene Wax weight.
SBS of the present invention is the styrene butadiene triblock copolymer, and molecular-weight average is 30,000 to 450,000.
Composite modified asphalt of the present invention, used pitch are various petroleum pitch.
Composite modified asphalt of the present invention, used Poly Propylene Wax is meant molecular-weight average 500-15000, and softening temperature is at 90-160 ℃ Poly Propylene Wax, and more excellent is molecular-weight average is 3000-6000, and softening temperature is at 120-150 ℃ Poly Propylene Wax.
Composite modified asphalt of the present invention, used FT paraffin is by expense--holder synthesis method synthetic paraffin, its fusing point is 68-105 ℃, especially the FT paraffin of oxidation.
Composite modified asphalt of the present invention, used linking agent are SULPHUR POWDER.
The preparation method of composite modified asphalt for pavement of the present invention is as follows: earlier pitch is heated to 110-200 ℃, to mobile fully, then SBS, Poly Propylene Wax and FT paraffin are joined in the pitch, mixed 30-480 minute, SBS adds linking agent behind the uniform mixing in pitch, get final product after all mixing.。
The above-mentioned composite modified asphalt material for preparing can also continue to place 10-1440 minutes at 130-200 ℃, so that its crosslinking reaction is further finished.
Beneficial effect of the present invention: the present invention joins in the bituminous mixture by using FT paraffin and Poly Propylene Wax, to increase SBS and bituminous consistency, also further improve simultaneously the bituminous high-temperature behavior, and the 135C viscosity of reduction modifying asphalt, to reduce the difficulty of construction of modifying asphalt, help construction.
Embodiment
Embodiment 1
500g East Sea 90# pitch is placed in one 1 liter the beaker, pitch is heated to 180 ℃, then with 15gFT paraffin (German Schumann. Sa Suoer company produces, commodity are called Sasobit) and 20gSBS (YH-791H, Sinopec Group produces), the 15g Poly Propylene Wax joins in the pitch respectively, adopt in the machine,massing in stirring under the 200 commentariess on classics/min conditions after 240 minutes, the SBS that observes in the beaker has solved homogeneously in the pitch, and then the SULPHUR POWDER that slow adding 0.75 restrains in a minute, continue to stir 120 minutes, pitch is put into the baking oven of 163C and placed 120 minutes, obtain modifying asphalt, character sees Table two.
Embodiment 2～3
The preparation method is with embodiment 1, and the proportioning of each component sees Table one.
Table one
| Component | Embodiment 1 | Embodiment 2 | Embodiment 3 |
| Pitch, g | 500 | 500 | 500 |
| SBS，g | 20 | 40 | 15 |
| Poly Propylene Wax, g | 15 | 30 | 20 |
| FT paraffin, g | 15 | 30 | 5 |
| SULPHUR POWDER, g | 0.75 | 0.75 | 0.75 |
The performance of each embodiment gained composite modified asphalt sees Table two.
Table two
| Embodiment 1 | Embodiment 2 | Embodiment 3 | |
| Penetration degree, dmm@25 ℃ | 56 | 41 | 71 |
| Softening temperature, ℃ @5 ℃/min | 85 | 95 | 61 |
| 135C viscosity, Pa.S | 0.7 | 1.4 | 0.6 |
| Isolation test, ℃ | 0.5 | 0.5 | 0.5 |
As can be seen from Table II, adding the modifying asphalt softening temperature of preparing behind SBS, FT paraffin and the Poly Propylene Wax increases substantially, the high-temperature behavior that shows composite modified asphalt is improved, and after adding FT paraffin and Poly Propylene Wax, the 135C viscosity of modifying asphalt is little, show add FT paraffin and Poly Propylene Wax after, modifying asphalt be easy to construction; Simultaneously according to the course of processing also as can be seen, behind adding FT paraffin and the Poly Propylene Wax, the dissolved time is about 240 minutes in the SBS pitch, illustrates that the process period of modifying asphalt is also very short.
Embodiment 1～5 is carried out wheel tracking test respectively with former state pitch, the results are shown in Table three.
Table three
As can be seen from Table III, the composite modified asphalt for pavement dynamic stability of the present invention's preparation improves, and shows that the modifying asphalt that the present invention prepares has good anti-rut performance, and its high-temperature stability has obtained obvious improvement.
Claims (7)
1, a kind of composite modified asphalt, by pitch, styrene butadiene triblock copolymer is that SBS, Poly Propylene Wax, FT paraffin and linking agent are formed, wherein SBS content is 3.0%-8.0% of pitch weight, Poly Propylene Wax content is 3.0%-6.0% of pitch weight, the content of FT paraffin is 1.0%-4% of pitch weight, content of crosslinking agent is the 3%-5% of SBS weight, and linking agent is a SULPHUR POWDER.
2, composite modified asphalt as claimed in claim 1 is characterized in that Poly Propylene Wax is meant molecular-weight average 500-15000, and softening temperature is at 90-160 ℃ Poly Propylene Wax.
3, composite modified asphalt as claimed in claim 1 is characterized in that, SBS is the styrene butadiene triblock copolymer, and molecular-weight average is 30,000 to 450,000.
4, composite modified asphalt as claimed in claim 2 is characterized in that Poly Propylene Wax is meant molecular-weight average 3000-6000, and softening temperature is at 120-150 ℃ Poly Propylene Wax.
5, composite modified asphalt as claimed in claim 1 is characterized in that FT paraffin is that fusing point is 68-105 ℃ by expense-holder synthesis method synthetic paraffin.
6, composite modified asphalt as claimed in claim 5 is characterized in that FT paraffin is the FT paraffin of oxidation.
7, the preparation method of composite modified asphalt as claimed in claim 1, this method steps is as follows: earlier pitch is heated to 110-200 ℃, to mobile fully, then SBS, Poly Propylene Wax and FT paraffin are joined in the pitch, mixed 30-480 minute, SBS adds linking agent behind the uniform mixing in pitch, get final product after all mixing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100310102A CN100503730C (en) | 2005-10-20 | 2005-10-20 | Composite modified asphalt and its preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100310102A CN100503730C (en) | 2005-10-20 | 2005-10-20 | Composite modified asphalt and its preparation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1952011A CN1952011A (en) | 2007-04-25 |
| CN100503730C true CN100503730C (en) | 2009-06-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100310102A Expired - Fee Related CN100503730C (en) | 2005-10-20 | 2005-10-20 | Composite modified asphalt and its preparation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100503730C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| MX314208B (en) * | 2007-07-26 | 2013-10-14 | Akzo Nobel Nv | Adhesion and cohesion modifiers for asphalt. |
| CN101456700B (en) * | 2008-12-22 | 2011-11-16 | 同济大学 | Method for preparing composite modified rubber asphalt mixture |
-
2005
- 2005-10-20 CN CNB2005100310102A patent/CN100503730C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1952011A (en) | 2007-04-25 |
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| C14 | Grant of patent or utility model | ||
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| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Sichuan Guoli Burning Oil Co., Ltd. Assignor: Tongji University Contract record no.: 2011510000029 Denomination of invention: Composite modified asphalt and its preparation method Granted publication date: 20090624 License type: Exclusive License Open date: 20070425 Record date: 20110406 |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090624 Termination date: 20131020 |