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SBR (styrene butadiene rubber) modified recycling agent for aged asphalt road surface in alpine regions, and preparation method and usage of the recycling agent

A technology for alpine areas and asphalt pavement, which is applied to roads, roads, road repairs, etc. It can solve the problems of small ductility recovery of aged asphalt, no products in alpine areas, poor low temperature crack resistance, etc., and improve storage stability. , Enhance the frost resistance and crack resistance of pavement, and the effect of excellent low temperature effect

Active Publication Date: 2014-01-01
YINGDA HEAT REGENERATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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  • SBR (styrene butadiene rubber) modified recycling agent for aged asphalt road surface in alpine regions, and preparation method and usage of the recycling agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1 SBR modified regenerant for aging asphalt pavement in alpine regions, the mass percentage of each component:

[0029] Styrene Butadiene Rubber (SBR) 9.95%

[0030] 90A asphalt 60%

[0031] Extract oil 30%

[0032] Cross-linking agent 0.05%.

Embodiment 2

[0033] Example 2 SBR modified regeneration agent for aging asphalt pavement in alpine regions, the mass percentage of each component:

[0034] Styrene Butadiene Rubber (SBR) 30%

[0035] 90A asphalt 15%

[0036] Oil extraction 54.8%

[0037] Cross-linking agent 0.2%.

Embodiment 3

[0038] Example 3 SBR modified regeneration agent for aging asphalt pavement in alpine regions, the mass percentage of each component:

[0039] Styrene Butadiene Rubber (SBR) 19.9%

[0040] 90A asphalt 10%

[0041] Extract oil 70%

[0042] Cross-linking agent 0.1%.

[0043] In the above examples: 90A bitumen is Esso 90A or Shell 90A, with ductility > 100cm at 15°C, softening point > 46°C, penetration 80-100; extracted oil is selected from furfural oil, vacuum residue, aromatics One of the oils; the cross-linking agent is selected from MAW asphalt cross-linking agent.

[0044] In each of the above-mentioned embodiments, the preparation method of SBR modified regeneration agent for aging asphalt pavement in alpine regions:

[0045] According to the mass percent of each component of the aging asphalt pavement SBR modified regeneration agent in the alpine region of the present invention,

[0046] ① Pump asphalt into the mixing tank, when the temperature rises to 120°C, pump in...

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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 regenerant for thermal regeneration of aged asphalt on asphalt pavement, in particular to an SBR modified regenerant for thermal regeneration of aged asphalt on asphalt pavement in alpine regions, as well as its preparation method and use method. Background technique [0002] Long sunshine hours, strong ultraviolet rays, high altitude, low temperature, and large temperature difference between day and night in alpine regions have caused serious damage to asphalt pavement. The road surface is generally prone to looseness, cracks, potholes, ruts and other diseases. The task of road maintenance in these areas is even more arduous. [0003] The recycling of old asphalt pavement materials can save a lot of asphalt and gravel materials, save engineering investment, and at the same time help to deal with waste and protect the environment. Hot-in-place regeneration process (HIR) can effectively remove loose, pockmarked ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L9/06E01C19/10
Inventor 施伟斌张义甫戴合理杨键候文超高磊
Owner YINGDA HEAT REGENERATION