CN1673281A - Hot storage stable polyethylene modified asphalt material and its prepn process - Google Patents
Hot storage stable polyethylene modified asphalt material and its prepn process Download PDFInfo
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- CN1673281A CN1673281A CN 200410029599 CN200410029599A CN1673281A CN 1673281 A CN1673281 A CN 1673281A CN 200410029599 CN200410029599 CN 200410029599 CN 200410029599 A CN200410029599 A CN 200410029599A CN 1673281 A CN1673281 A CN 1673281A
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Abstract
The present invention is polyethylene modified asphalt material with heat storing stability and its preparation process. The polyethylene modified asphalt material has phosphide assistant added and thus no segregation under heat storing condition and performance indexes meeting the requirement for use as road asphalt. The preparation process includes adding assistant into asphalt via stirring and subsequent adding polyethylene modifier, which is shearing stirred for dispersing in asphalt.
Description
Field that the present invention belongs to
The invention relates to a kind of polyethylene modified asphalt material and preparation method thereof.
The prior art background
The most wax content height of homemade ordinary road pitch, temperature sensitivity is big, fragile under low temperaturely splits, high temperature easily flows, and causes bituminous pavement rut to occur, gathers around bag, chaps, peels off, cheats early damage such as hole, is difficult to adapt to the demand of the Road construction of China's high speed development.Discovering in a large number both at home and abroad, is to improve bituminous road one of effective way of technical feature with polymer modified asphalt.
The polymkeric substance that is used for modifying asphalt at present mainly comprises thermoplastic elastomer, resene, rubber-like etc., (USP 4 for wherein relevant styrene butadiene block polymer (SBS), 145,322, USP 5371121), (USP 5 for polyethylene (PE), 494,966), (USP 3 for styrene-butadiene rubber(SBR) (SBR), 634,293) etc. the research of modifying asphalt is more, in these properties-correcting agent, waste polyethylene is a kind ofly can well improve asphalt performance, and therefore cheap again environmental additive attracts tremendous attention.But waste polyethylene and pitch exist than big-difference at molecular weight, polarity, density, solubility parameters etc., thereby can be separated when heat-storage, reduce the usability and the workability of modifying asphalt.
For avoiding isolating generation, Novophalt (USP 4,314,921) adopts the method for on-the-spot preparation use, and this method needs specific equipment.Chinese patent 00108269.9 discloses a kind of composition, comprise multiple materials such as carboxylic acidifying polyethylene, polyhutadiene, end amido perbutan, sulphur, can stablize high-density, the new LDPE (film grade) modifying asphalt of low dosage, can not stablize the waste polyethylene modifying asphalt, complex manufacturing technology, the production cost height, the industrialization difficulty.
The purpose of invention
The object of the present invention is to provide a kind of modified asphalt material of high temperature area using and preparation method thereof that is suitable for, this material has characteristics such as anti-rut, anti-water damage, is a kind of high-quality, inexpensive environment-friendly type road material.
The content of invention
The present invention is the stable polyethylene modified asphalt material of a kind of heat-storage, contains petroleum pitch, PE modified dose and P contained compound.PE modified dose can be a kind of in high density polyethylene(HDPE), new LDPE (film grade), the waste polyethylene etc., and consumption is 1%～15% of a pitch amount.P contained compound can be one or more mixtures in polyphosphoric acid, phosphoric acid, phosphorous acid, modification Tripyrophosphoric acid and the phosphate compounds as auxiliary agent, and phosphorus content is 0.2%～1.2% of a pitch amount.
The preparation method may further comprise the steps:
One, in 135 ℃～180 ℃ fusion matrix pitches, adds 0.2%～1.2% P contained compound, fully stir 10～60 minutes time.
Two, add 1%～15% polyethylene at 165 ℃～195 ℃ fusion matrix pitches, polyethylene is disperseed in the pitch 20～60 minutes time by equipment such as shears or colloidal mills.
The present invention realizes like this, in the homemade ordinary traffic pitch of hot melt, add appropriate amount of addition agent, when each component composition of pitch changes, improved the bituminous texture of matrix pitch, increased the viscosity of matrix pitch, add PE modified dose this moment, through shearing action, properties-correcting agent can be dispersed in the pitch, is not having not find the properties-correcting agent clustering phenomena in 163 ℃ of storages after 48 hours under the condition of stirring, and upper and lower layer softening temperature difference is less than 2.5 ℃.Accompanying drawing 1, accompanying drawing 2 are respectively not adding assistant, waste polyethylene modifying asphalt fluorescent microscope photo (400 times of magnifications) when adding auxiliary agent, as seen add auxiliary agent post-modification agent particle size reduction, be uniformly dispersed, the interface is fuzzy, and these have good promoter action undoubtedly for enhancing modified bituminous use properties and package stability.
The advantage of invention
The present invention adds auxiliary agent in advance in matrix pitch, improve the bituminous colloidal structure, improves bituminous density and viscosity, helps the dispersion of properties-correcting agent, and stops reassociating of properties-correcting agent effectively.Compare with method of modifying in the past, the present invention has following remarkable advantage: (1) has improved the heat-storage stability of polyethylene modified asphalt effectively, significantly improve homemade ordinary traffic bituminous technical feature, met the road bituminous material performance index (i.e. " highway Modified Bitumen Pavement construction technique normalizing " JTJ036-1998) of China the Ministry of Communications regulation.(2) because homemade ordinary traffic pitch of employing and waste polyethylene are raw material, greatly reduce the production cost of modifying asphalt, aspect environment protection, also can produce bigger social benefit simultaneously.
Embodiment 1～7
Be heated to 500 gram pitches mobile, add appropriate amount of addition agent, reacted 30 minutes down at 180 ℃, add an amount of polyethylene again, in 170～180 ℃ of high speed shear 30 minutes, obtain modifying asphalt, by the Ministry of Communications's " highway engineering pitch and asphalt testing regulation " (JTJ052-2000) in the correlation test rules test its performance, the results are shown in following table.
| Example | ???1 | ???2 | ???3 | ???4 | ???5 | ???6 | ???7 |
| Matrix pitch | ???A-100 | ???A-100 | ???A-100 | ???A-100 | ???AH-90 | ???AH-90 | ???A-100 |
| Auxiliary agent %wt | ???0 | ???0.44 | ???0.55 | ???0.44 | ???0 | ???0.37 | ???0.29 |
| Polyethylene %wt | 3 (waste and old) | 2 (waste and old) | 3 (waste and old) | 4 (low density) | 2 (waste and old) | 2 (waste and old) | 4 (high-density) |
| 25 ℃ of penetration degrees (0.1mm), 100g, 5s | ???- | ???48 | ???41 | ???50 | ???- | ???46 | ???52 |
| ??PI | ???- | ???0.91 | ???0.93 | ???0.26 | ???- | ???1.06 | ???0.53 |
| Softening temperature (℃) | ???- | ???66.1 | ???75.8 | ???58.5 | ???- | ???70.3 | ???62.6 |
| Rotary viscosity (Pa.s) | ???- | ???1.500 | ???2.015 | ???1.250 | ???- | ???1.985 | ???1.350 |
| The segregation, softening temperature poor (℃) | ＞30 (segregation is serious) | (0.3 no properties-correcting agent is assembled) | (2.2 no properties-correcting agent is assembled) | (1.6 no properties-correcting agent is assembled) | ＞30 (segregation is serious) | (1.8 no properties-correcting agent is assembled) | (2.1 no properties-correcting agent is assembled) |
Claims (8)
1. the polyethylene modified asphalt material that heat-storage is stable contains petroleum pitch and properties-correcting agent polyethylene, it is characterized in that including the P contained compound that phosphorus content is a pitch amount 0.2%～1.2%.
2. the polyethylene modified asphalt material that heat-storage according to claim 1 is stable, it is characterized in that: described PE modified dose can be in high density polyethylene(HDPE), new LDPE (film grade), the waste polyethylene etc. one or more, and consumption is 1%～15% of a pitch amount.
3. the polyethylene modified asphalt material that heat-storage according to claim 1 is stable is characterized in that: P contained compound can be one or more mixtures in polyphosphoric acid, phosphoric acid, phosphorous acid, modification Tripyrophosphoric acid and the phosphate compounds.
4. one kind is used for the stable polyethylene modified asphalt preparation methods of heat-storage, and it is characterized in that: the method includes the steps of:
(1), in 135 ℃～200 ℃ fusion matrix pitches, adds 0.2%～1.2% P contained compound, fully stirring, 10～90 minutes time.
(2), add 1%～15% polyethylene, polyethylene is disperseed in the pitch 20～80 minutes time by equipment such as shears or colloidal mills at 165 ℃～195 ℃ fusion matrix pitches.
5. according to claim 4 described preparation methods, it is characterized in that: the churning time of step (1) is 30～60 minutes.
6. according to claim 4 described preparation methods, it is characterized in that: the asphalt temperature of step (1) is 150 ℃～190 ℃.
7. according to claim 4 described preparation methods, it is characterized in that: the P contained compound phosphorus content is 0.3%～1.0% of a pitch amount described in the step (1).
8. according to claim 4 described preparation methods, it is characterized in that: polyethylene described in the step (2) is 1%～10% of a pitch amount when adding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410029599 CN1673281A (en) | 2004-03-26 | 2004-03-26 | Hot storage stable polyethylene modified asphalt material and its prepn process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410029599 CN1673281A (en) | 2004-03-26 | 2004-03-26 | Hot storage stable polyethylene modified asphalt material and its prepn process |
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| CN1673281A true CN1673281A (en) | 2005-09-28 |
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| CN 200410029599 Pending CN1673281A (en) | 2004-03-26 | 2004-03-26 | Hot storage stable polyethylene modified asphalt material and its prepn process |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110218463A (en) * | 2019-07-16 | 2019-09-10 | 黄河三角洲京博化工研究院有限公司 | A kind of modified pitch and preparation method thereof |
| CN111472224A (en) * | 2020-04-22 | 2020-07-31 | 河南派普建工集团有限公司 | Road construction method |
-
2004
- 2004-03-26 CN CN 200410029599 patent/CN1673281A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110218463A (en) * | 2019-07-16 | 2019-09-10 | 黄河三角洲京博化工研究院有限公司 | A kind of modified pitch and preparation method thereof |
| CN110218463B (en) * | 2019-07-16 | 2021-09-21 | 黄河三角洲京博化工研究院有限公司 | Modified asphalt and preparation method thereof |
| CN111472224A (en) * | 2020-04-22 | 2020-07-31 | 河南派普建工集团有限公司 | Road construction method |
| CN111472224B (en) * | 2020-04-22 | 2021-11-26 | 河南派普建工集团有限公司 | Road construction method |
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