CN101985522A - Rubber modified asphalt and preparation method thereof - Google Patents
Rubber modified asphalt and preparation method thereof Download PDFInfo
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- CN101985522A CN101985522A CN 201010255807 CN201010255807A CN101985522A CN 101985522 A CN101985522 A CN 101985522A CN 201010255807 CN201010255807 CN 201010255807 CN 201010255807 A CN201010255807 A CN 201010255807A CN 101985522 A CN101985522 A CN 101985522A
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- asphalt
- modified asphalt
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Abstract
The invention provides rubber modified asphalt and a preparation method thereof. The method comprises the following steps: petroleum asphalt is conveyed by an asphalt pump, metered by a mass flowmeter and heated to 170-180 DEG C by a rapid heating heat exchange system; and the heated hot asphalt, rubber powder and additives are added to a mixer after being proportionally metered to be stirred for mixing and swelling, and the reaction time is 40min. The rubber modified asphalt is prepared by mixing 42% of petroleum asphalt, 35% of rubber powder, 15% of coal tar, 5% of cement and 3% of dimethylamino pyridine. Scrap tire rubber powder is added at high proportion; therefore, the rubber modified asphalt has great environmental protection significance, and at the same time, the wax content in the finished asphalt is reduced, the applicable scope of temperature is expanded to minus 40-90 DEG C and the 180 DEG C rotary viscosity value is kept between 1.5Pa.s and 2.5Pa.s, thus improving the construction workability.
Description
Technical field
The present invention relates to building, road construction material and preparation method thereof, is rubber modified asphalt and preparation method thereof specifically.
Background technology
Chinese patent literature discloses a kind of " desulfurization glue powder-modified asphalt " (ZL03118863.X), this modifying asphalt is stirred by high speed shear under comparatively high temps by desulfurization rubber powder, pitch and compatilizer or the grinding of colloidal mill makes, its medium pitch accounts for 70～95% of raw material gross weight, the desulfurization rubber powder accounts for 5～30% of raw material gross weight, and phase solvent accounts for 0～1.5% of raw material gross weight.Compatilizer is epoxidized polybutadiene, glytidyl methacrylate, glycidyl methacrylate or maleic acid.
Summary of the invention
The purpose of this invention is to provide a kind of follow-on rubber modified asphalt.
The object of the present invention is achieved like this: a kind of rubber modified asphalt, form by following raw material mixing by weight percentage:
Petroleum pitch 42%; Rubber powder 35%; Coal tar 15%; Cement 5%; Dimethylamino pyridine 3%.
Another object of the present invention provides the preparation method of above-mentioned rubber modified asphalt.
Another object of the present invention is achieved in that a kind of preparation method of rubber modified asphalt, carries out according to the following steps:
A, petroleum pitch are carried by bitumenpump, and mass flow meter measures and is warming up to 170～180 ℃ through the heat exchange system that is rapidly heated;
B, heated bitumen, rubber powder and additive after will heating up measure the back in proportion and add and stir in the mixing machine to mix swelling, reaction times: 40 minutes;
C, gained mixture in b step is pumped to colloidal mill shears grinding;
D, will shear mixture after grinding and be pumped to the reaction hold-up vessel fast once more after the swelling, and reply and be pumped to colloidal mill and generate qualified rubber modified asphalt finished product to shear once more to grind.
Compared with prior art, the present invention has following technical superiority:
1, a high proportion of material modified admixture technology
In the aforementioned prior art, the additional proportion of damaged tire rubber powder in pitch is in 5.5%～42.8% scope, and promptly maximum additional proportion is 42.8%.And the damaged tire rubber powder is 83.3% to the bituminous additional proportion among the present invention, and usually, 10 tons of rubber modified asphalts of every production can utilize 3.5 tons of damaged tire rubber powders, has important environment protection significance to eliminating the damaged tire black pollution.
2, admixture damaged tire rubber powder in high proportion makes the wax content of road asphalt drop to the level that is lower than Imported Asphalt, has improved the road asphalt quality product greatly, and temperature applicable range expands to-40 ℃～90 ℃ from 5 ℃～45 ℃;
3,180 of the finished product rubber modified asphalt ℃ of rotary viscosity values remain on 1.5～2.5Pa.s, and its liquidity scale is near petroleum pitch, and construction workability strengthens greatly, for the enforcement of admixture damaged tire rubber powder at high proportion provides feasibility.
Product of the present invention is mainly used in road construction work, and high-grade highway construction particularly has advantages such as warm area a wider range, visco-elasticity be better.
Embodiment
Preparation embodiment:
Petroleum pitch is carried by bitumenpump, and mass flow meter measures and is warming up to 170～180 ℃ through the heat exchange system that is rapidly heated; Heated bitumen, rubber powder and additive after heating up are measured back the adding in proportion to be stirred in the mixing machine to mix swelling, reaction times: 40 minutes.This ratio is: petroleum pitch 42%; Rubber powder 35%; Coal tar 15%; Cement 5%; Dimethylamino pyridine 3% (catalyzer).
Gained mixture in b step is pumped to colloidal mill shears grinding; Mixture after shear grinding is pumped to the reaction hold-up vessel fast once more after the swelling, replys and be pumped to colloidal mill and generate qualified rubber modified asphalt finished product to shear once more to grind.
Be prepared into the resistance feature:
The present invention has the anti-fracture of the anti-rut of high temperature, low temperature, anti-water, anti-Japanese photograph, anti-oxidant, noise reduction sound, alleviate characteristics such as pavement reflecting.
Petroleum pitch (mid-temperature pitch): softening temperature (ring and ball method) ℃: 75～90 ℃.
Coal tar: be aromatic hydrocarbons and polynuclear aromatics and nitrogenous, oxygen, the mixture of the heteroaromatic hydrocarbon of sulphur.Outward appearance is black viscous liquid (or semi-solid).Proportion 1.18～1.23 is dissolved in benzene, ether, dithiocarbonic anhydride, chloroform, ethanol, acetone and methyl alcohol.Be slightly soluble in water.
Dimethylamino pyridine (being the 4-Dimethylamino pyridine): make by 4-chloropyridine and dimethylamine reaction.
Performance test the results list of rubber modified asphalt of the present invention is as follows:
The characteristics of rubber modified asphalt of the present invention are as follows:
1, a high proportion of material modified admixture technology, 10 tons of rubber modified asphalts of every production can utilize 3.5 tons of damaged tire rubber powders, have important environment protection significance to eliminating the damaged tire black pollution;
2, admixture damaged tire rubber powder in high proportion makes the paraffin content of road asphalt drop to the level that is lower than Imported Asphalt, has greatly improved the road asphalt product quality, and temperature applicable range expands to-40 ℃～90 ℃ from 5 ℃～45 ℃;
3,180 of the finished product rubber modified asphalt ℃ of rotary viscosity values remain on 1.5～2.5Pa.s, and its liquidity scale is near asphalt, and construction workability strengthens greatly, for the enforcement of admixture damaged tire rubber powder at high proportion provides feasibility.
Rubber modified asphalt of the present invention is compared with international like product: keeping Pyatyi adhesion, anti-water, anti-Japanese photograph, anti-oxidant, the anti-rut of high temperature, the anti-fracture of low temperature, noise-reducing, alleviate pavement reflecting, all meeting or exceeding international like product on the multinomial performance index such as increase the service life, be the high-and-new science and technology product with leading level in the world.
Infrared chromatography detects and shows, rubber modified asphalt of the present invention makes the new material group of appearance between asphalt and rubber powder group, the admixture inorganic raw material increases bond area between the network structure of rubber modified asphalt simultaneously, has improved dramatically the performance of rubber modified asphalt and the construction effect that engineering paves.
Claims (2)
1. rubber modified asphalt is characterized in that: mixed by by weight percentage following raw material and form:
Petroleum pitch 42%; Rubber powder 35%; Coal tar 15%; Cement 5%; Dimethylamino pyridine 3%.
2. preparation method of rubber modified asphalt according to claim 1 is characterized in that: carry out according to the following steps:
A, petroleum pitch are carried by bitumenpump, and mass flow meter measures and is warming up to 170～180 ℃ through the heat exchange system that is rapidly heated;
B, heated bitumen, rubber powder and additive after will heating up measure the back in proportion and add and stir in the mixing machine to mix swelling, reaction times: 40 minutes;
C, gained mixture in b step is pumped to colloidal mill shears grinding;
D, will shear mixture after grinding and be pumped to the reaction hold-up vessel fast once more after the swelling, and reply and be pumped to colloidal mill and generate qualified rubber modified asphalt finished product to shear once more to grind.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010255807 CN101985522A (en) | 2010-08-18 | 2010-08-18 | Rubber modified asphalt and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010255807 CN101985522A (en) | 2010-08-18 | 2010-08-18 | Rubber modified asphalt and preparation method thereof |
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| Publication Number | Publication Date |
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| CN101985522A true CN101985522A (en) | 2011-03-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN 201010255807 Pending CN101985522A (en) | 2010-08-18 | 2010-08-18 | Rubber modified asphalt and preparation method thereof |
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| CN (1) | CN101985522A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101235207A (en) * | 2008-01-17 | 2008-08-06 | 徐培华 | Asphalt pavement crevice embedding sealing material and preparation method thereof |
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2010
- 2010-08-18 CN CN 201010255807 patent/CN101985522A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101235207A (en) * | 2008-01-17 | 2008-08-06 | 徐培华 | Asphalt pavement crevice embedding sealing material and preparation method thereof |
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Open date: 20110316 |