SBR (styrene butadiene rubber) modified recycling agent for aged asphalt road surface in alpine regions, and preparation method and usage of the recycling agent
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A technology for aging asphalt in alpine regions, applied in the field of SBR modified regenerant for thermal regeneration of asphalt pavement aging asphalt. Achieve the effects of improving storage stability, enhancing the anti-freezing and anti-cracking ability of the pavement, and excellent low-temperature effect
Active Publication Date: 2012-07-25
YINGDA HEAT REGENERATION
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Problems solved by technology
At present, there are many kinds of SBR modified regenerants in the market, with different varieties and specifications, and there are no products specially used in alpine regions
The existing ordinary asphalt rejuvenator has very little ductility recovery for aged asphalt, and it is common to be brittle after adding a certain amount. The use of existing common asphalt regenerants in alpine regions to restore the performance of asphalt mixtures has little effect
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Embodiment 1
[0028] Example 1 SBR modified regenerating agent for aged asphalt pavement in high-cold area, mass percentage of each component:
[0029] Styrene butadiene rubber (SBR) 9.95%
[0030] 90A asphalt 60%
[0031] Extract oil 30%
[0032] Crosslinking agent 0.05%.
Embodiment 2
[0033] Example 2 SBR modifier and regeneration agent for aged asphalt pavement in high-cold area, mass percentage of each component:
[0034] Styrene Butadiene Rubber (SBR) 30%
[0035] 90A asphalt 15%
[0036] Extracted oil 54.8%
[0037] Crosslinking agent 0.2%.
Embodiment 3
[0038] Example 3 SBR modified regeneration agent for aged asphalt pavement in high-cold area, mass percentage of each component:
[0039] Styrene butadiene rubber (SBR) 19.9%
[0040] 90A asphalt 10%
[0041] Oil out 70%
[0042] Crosslinking agent 0.1%.
[0043] In the above embodiments: Esso 90A or Shell 90A is selected for 90A asphalt, with a ductility of 15°C> 100cm, softening point> 46°C, penetration degree 80-100; extracted oil is selected from furfural oil, vacuum residue, aromatic oil; crosslinking agent is selected from MAW asphalt crosslinking agent.
[0044] In the above embodiments, the preparation method of SBR modified regeneration agent for aged asphalt pavement in high-cold area:
[0045] According to the present invention, the mass percentage of each component of the SBR modified regeneration agent for the aged asphalt pavement in the alpine area,
[0046] ① Pump asphalt into the mixing tank, when the temperature is up to 120℃, pump in and extract the oil, keep the tempera...
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Abstract
The invention discloses an SBR (styrene butadiene rubber) modified recycling agent for an aged asphalt road surface in alpine regions, which comprises the following components by mass: 9.95-30% of SBR, 15-60% of 90A asphalt, 30-70% of extract oil, and 0.05-0.2% of a crosslinker. The invention also discloses a preparation method of the SBR modified recycling agent and a method for preparing recycled asphalt by use of the SBR modified recycling agent. The SBR modified recycling agent provided by the invention significantly improves the ductility of the aged asphalt, the recycled asphalt becomes pliable, the crack resistance of the road surface is remarkably improved, and the recycling agent is suitable for recycling of the aged asphalt road surface in alpine regions. For upgrading and processing of asphalt, generally only addition of the SBR modified recycling agent provided by the invention is needed, the processing technology is simple and the quality is easy to control. The SBR modified recycling agent has a good effect at a low temperature, raw materials are stable in quality and easy to purchase, storage stability are good, the physicochemical properties are stable, on-site operation are convenient, and the SBR modified recycling agent is suitable for on-site hot recycling construction as a special recycling agent in alpine regions and for factory processing for upgrading of asphalt.
Description
Technical field [0001] The invention relates to an SBR modified regeneration agent for thermal regeneration of aging asphalt on asphalt pavement, in particular to an SBR modified regeneration agent for thermal regeneration of aging asphalt on asphalt pavement in alpine regions, and a preparation method and use method thereof. Background technique [0002] Alpine areas have long sunshine hours, strong ultraviolet rays, high altitude, low temperature, and large temperature difference between day and night. These extreme natural conditions have caused serious damage to the asphalt pavement. The pavement is generally loose, cracks, potholes, rutting and other diseases. The task of road maintenance in these areas is even more difficult. [0003] The recycling of old asphalt pavement materials can save a lot of asphalt and sand and gravel materials, save engineering investment, and at the same time facilitate the disposal of waste materials and protect the environment. The thermal in-si...
Claims
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