CN1990587A - Composite modified asphalt material capable of improving workability and preparation method thereof - Google Patents
Composite modified asphalt material capable of improving workability and preparation method thereof Download PDFInfo
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- CN1990587A CN1990587A CN 200510112337 CN200510112337A CN1990587A CN 1990587 A CN1990587 A CN 1990587A CN 200510112337 CN200510112337 CN 200510112337 CN 200510112337 A CN200510112337 A CN 200510112337A CN 1990587 A CN1990587 A CN 1990587A
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- composite modified
- modified asphalt
- asphalt material
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- polyethylene wax
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Abstract
The invention relates to a composite modified asphalt material capable of improving workability and process for preparation, wherein the material comprises polyethylene wax having an average molecular weight of 500-15000, a softening point of 90-160 deg C, preferably an average molecular weight of 3000-6000, a softening point of 120-150 deg C. Compared with the conventional modifying methods, the invention can achieve better high temperature and low temperature property of the asphalt material, improved workability, stabilized storage, and simplified manufacturing techniques. Because of the admission of petroleum resin, the adhesiveness of the asphalt is also increased substantially.
Description
Technical field
The present invention relates to a kind of composite modified asphalt material technical field of improving workability.
Background technology
The interpolation polymkeric substance is used for improving the bituminous performance and has decades in pitch, and U.S. Pat 5002987 has been reported with styrene-butadiene rubber(SBR) and improved the bituminous performance, but butylbenzene rubber mainly improves the bituminous low-temperature performance, and is not obvious to the improvement of high-temperature behavior.Chinese patent CN1287133A discloses the method that adopts SBR and SBS composite modified asphalt, but the shortcoming of this method is owing to adopted SBS, its processing units needs colloidal mill, production technique is comparatively complicated, simultaneously because to wherein having added sulphur, can produce deleterious hydrogen sulfide in process of production, environment is had pollution.In pitch, add EVA and improve the bituminous high-temperature behavior and obtained widespread use, but the workability of EVA modifying asphalt is than plain asphalt difference the America and Europe.
Summary of the invention
The object of the present invention is to provide and a kind ofly can improve bituminous workability and high-temperature behavior composite modified asphalt material simultaneously.
The present invention is a kind of modified asphalt material that is used for road, and its properties-correcting agent is made up of ethylene vinyl acetate resin (EVA), polyethylene wax and petroleum resin, the weight proportion of these several components can according to actual road surface require and.
The composite modified asphalt material that improves workability of the present invention, form by pitch, EVA, polyethylene wax and petroleum resin, wherein EVA content is the 1%-10% of pitch weight, and polyethylene wax content is the 1%-6% of pitch weight, and petroleum resin content is 5%～30% of pitch weight.
The composite modified asphalt material that improves workability of the present invention, its medium pitch are various petroleum pitch.
The composite modified asphalt material that improves workability of the present invention, wherein the content of EVA is preferably the 3.0%-6% of pitch weight.EVA is that the ethylene vinyl acetate resin of being produced on the general industry gets final product.
The composite modified asphalt material that improves workability of the present invention, wherein polyethylene wax is meant that molecular-weight average is at 500-15000, softening temperature is at 90-160 ℃ polyethylene wax, and more excellent is molecular-weight average is at 3000-6000, and softening temperature is at 120-150 ℃ polyethylene wax.
The composite modified asphalt that improves workability of the present invention, wherein the content of petroleum resin is preferably 10%～20% of pitch weight.Petroleum resin are meant softening temperature at 70-150 ℃ petroleum resin, and more excellent is softening temperature is at 90-115 ℃ petroleum resin.
Its production method of composite modified asphalt material of improving workability of the present invention is such: pitch is heated to about 110-200 ℃ earlier to mobile fully, then polyethylene wax, petroleum resin and EVA are joined in the pitch by above-mentioned weight ratio and mixed 30-480 minute, treat to get final product after polyethylene wax, petroleum resin, EVA and pitch mix the modifying asphalt finished product.
Beneficial effect of the present invention: compare with method of modifying in the past, the present invention can improve the high temperature and the low-temperature performance of bituminous material, has improved workability, and storage-stability, and production technique is simple; Again owing in pitch, added petroleum resin, also obtained very big improvement with the adhesivity of building stones.
Embodiment
1000g Maoming 90# pitch is heated down at 150 ℃, then 20g polyethylene wax (Thailand polyethylene company limited (TPE) production, LP1100P) and 50g petroleum resin are slowly added, starting whipping device simultaneously slowly stirred 45 minutes, after simultaneously the bituminous temperature evenly being risen to 180 ℃, (trade mark is 28/150, and promptly VA content is 28% to add 45gEVA, FI is 150), stir that EVA mixes fully after 45 minutes in pitch, obtain modifying asphalt, its character sees Table 1.
Comparative Examples 1
1000g Maoming 90# pitch 180 ℃ of down heating, then with 45gEVA (trade mark is 28/150, and promptly VA content is 28%, and FI is 150), is stirred that EVA mixes fully after 45 minutes in pitch, obtain modifying asphalt, its character sees Table 1.
Table 1
| Numbering | Embodiment 1 | Comparative Examples 1 |
| Asphalt stock, g | 1000 | 1000 |
| Polyethylene wax, g | 20 | 0 |
| Petroleum resin, g | 50 | 0 |
| EVA，g | 45 | 45 |
| Penetration degree, dmm@25 ℃ | 53 | 61 |
| Softening temperature, ℃ @5 ℃/min | 55.0 | 50.5 |
| 135 ℃ of kinematic viscosity, Pa.S | 0.60 | 1.4 |
| Isolation test, ℃ | 0.5 | 0.5 |
As can be seen from Table 1, embodiments of the invention 1 road that all satisfies China regulation is with modifying asphalt index (i.e. " asphalt highway construction technique normalizing " JTJF40-2000; And its 135 ℃ of viscosity of the modifying asphalt of Comparative Examples 1 are very high, and softening temperature is lower, and the softening temperature of example 1 reaches 56 ℃, 135 ℃ of viscosity reduce, the modifying asphalt that the present invention's preparation is described has excellent high and workability, and simultaneously, the modifying asphalt of preparation can improve the adhesivity with building stones.
Claims (5)
1, a kind of composite modified asphalt material that improves workability, form by pitch, EVA, polyethylene wax and petroleum resin, wherein EVA content is the 1%-10% of pitch weight, and polyethylene wax content is the 1%-6% of pitch weight, and petroleum resin content is 5%～30% of pitch weight.
2, the composite modified asphalt material that improves workability as claimed in claim 1 is characterized in that, the content of EVA is the 3.0%-6% of pitch weight.
3, the composite modified asphalt material that improves workability as claimed in claim 1 is characterized in that, the molecular-weight average of polyethylene wax is 500-15000, and softening temperature is at 90-160 ℃.
4, arbitrary composite modified asphalt material that improves workability as claimed in claim 3 is characterized in that, the molecular-weight average of polyethylene wax is 3000-6000, and softening temperature is at 120-150 ℃.
5, the composite modified asphalt material that improves workability as claimed in claim 1 is characterized in that, petroleum resin content is 10%～20% of pitch weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510112337 CN1990587A (en) | 2005-12-29 | 2005-12-29 | Composite modified asphalt material capable of improving workability and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510112337 CN1990587A (en) | 2005-12-29 | 2005-12-29 | Composite modified asphalt material capable of improving workability and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1990587A true CN1990587A (en) | 2007-07-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510112337 Pending CN1990587A (en) | 2005-12-29 | 2005-12-29 | Composite modified asphalt material capable of improving workability and preparation method thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN1990587A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102443270A (en) * | 2010-10-11 | 2012-05-09 | 北京化工大学 | Asphalt modifier, modified asphalt containing the asphalt modifier and preparation method of the two |
-
2005
- 2005-12-29 CN CN 200510112337 patent/CN1990587A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102443270A (en) * | 2010-10-11 | 2012-05-09 | 北京化工大学 | Asphalt modifier, modified asphalt containing the asphalt modifier and preparation method of the two |
| CN102443270B (en) * | 2010-10-11 | 2016-01-27 | 北京化工大学 | Asphalt modifier, comprise the modifying asphalt of this properties-correcting agent and their respective preparation methods |
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