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Waste SBS (Styrene Butadiene Styrene) modified asphalt recycling method

A modified asphalt and waste technology, which is applied in the direction of recycling technology, building components, building insulation materials, etc., can solve the problems of increasing the environmental protection of recycled asphalt pavement, reducing construction costs, and not being environmentally friendly, so as to simplify the recycling process and reduce Construction cost, environmental protection effect

Active Publication Date: 2014-04-23
JIANGSU BAOLI INT INVESTMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the problem of recycling a large amount of waste SBS modified asphalt produced by maintenance and repair of expressways in my country, the present invention provides a method for recycling waste SBS modified asphalt. This method can ensure that the regenerated SBS modified asphalt is used in While the pavement has good service performance, it does not use additives, overcomes the shortcomings of high energy consumption and environmental protection in the recycling of existing SBS modified asphalt, simplifies the recycling process of waste SBS modified asphalt, and increases the efficiency of recycled asphalt pavement. Environmental protection, but also greatly reduce construction costs

Method used

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  • Waste SBS (Styrene Butadiene Styrene) modified asphalt recycling method
  • Waste SBS (Styrene Butadiene Styrene) modified asphalt recycling method
  • Waste SBS (Styrene Butadiene Styrene) modified asphalt recycling method

Examples

Experimental program
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Effect test

example 1～4

[0025]The waste SBS modified asphalt recovered from a 7-year service SBS modified asphalt pavement in Jilin Province is selected as Y7, and the waste SBS modified asphalt recovered from a 10-year service SBS modified asphalt pavement in Jilin Province is selected and marked as Y10, in order to reflect the regeneration effect of SBS modified asphalt on waste asphalt, in addition to adding SBS modified asphalt MA, the control group was set to add 70# asphalt to regenerate waste asphalt, that is to say, four groups of recycled asphalt were obtained: Example 1 is 70# asphalt regeneration Y7, example 2 is SBS modified asphalt regeneration Y7, example 3 is 70# asphalt regeneration Y10, example 4 is SBS modified asphalt regeneration Y10. Heat waste SBS-modified asphalt and fresh SBS-modified asphalt to 170°C, heat fresh 70# asphalt to 150°C, add waste SBS-modified asphalt to fresh asphalt according to the above four regeneration schemes, and waste SBS-modified The ratio of permanent ...

example 5～10

[0036] The asphalt mixture obtained from the waste asphalt pavement of a certain expressway in Jilin Province, which has been in service for 7 years, is used to remove impurities, crushed, dried and other processes. In T0726, the method for recovering asphalt from asphalt mixture (Abson method) recycles waste SBS modified asphalt mixture to obtain waste SBS modified asphalt. After heating the fresh SBS modified asphalt and the waste SBS modified asphalt to 170 °C respectively, the waste SBS modified asphalt was mixed according to the mass ratio of 0:100, 10:90, 20:80, 30:70, 40:60 and 50 : Mix with fresh SBS modified asphalt at a ratio of 50, and stir at a speed of 140r / min while mixing, keep the temperature of the asphalt at 170°C, stir at a speed of 140r / min for 15min, and then use a high-speed shearing instrument at a speed of 3000r / min min at a speed of shearing for 30 min to obtain regenerated SBS modified asphalt, which are respectively recorded as Example 5-Example 10. ...

example 11～16

[0042] The asphalt mixture obtained from the waste asphalt pavement of an expressway that has been in service for 10 years in Jilin Province is used, and then after impurity removal, crushing, drying and other processes, according to the "Experimental Regulations for Asphalt and Asphalt Mixtures in Highway Engineering" (JTJ052-2000) T0726 Method for recovering asphalt from asphalt mixture (Abson method) Recycling waste SBS modified asphalt mixture to obtain waste SBS modified asphalt. After heating the fresh SBS modified asphalt and the waste SBS modified asphalt to 170 °C respectively, the waste SBS modified asphalt was mixed according to the mass ratio of 0:100, 10:90, 20:80, 30:70, 40:60 and 50 :50 to mix with fresh SBS modified asphalt, and stir at a speed of 140r / min while adding, the asphalt mixing process is completed within 5min, keep the temperature of the asphalt at 170°C, and stir at a speed of 140r / min for 15min, Then use a high-speed shearer to shear at a speed of...

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Abstract

The invention discloses a waste SBS (Styrene Butadiene Styrene) modified asphalt recycling method comprising the following steps: a, recycling waste SBS modified asphalt from a waste asphalt mixture by using the abson method; b, adding the waste SBS modified asphalt into fresh SBS modified asphalt according to the mass ratio of 70:30 to 90:10 of the fresh SBS modified asphalt to the waste SBS modified asphalt, stirring and shearing to obtain the recycled SBS modified asphalt. By using the method, the better service performance of an SBS modified asphalt pavement is ensured, meanwhile, the recovered SBS modified asphalt is reused for preparing the recycled SBS modified asphalt on the premise that no additives are used, defects such as high energy consumption, instable performance and the like in the recycle of the traditional SBS modified asphalt are overcome, the waste SBS modified asphalt recycling process is simplified, the environment friendliness of the recycled asphalt pavement is also improved, and meanwhile, the construction cost is greatly reduced.

Description

technical field [0001] The invention relates to a method for recycling waste SBS modified asphalt. Background technique [0002] Since the ordinary asphalt pavement cannot meet the needs of my country's traffic development, it is necessary to modify the asphalt to improve the service performance of the pavement. Among many asphalt modifiers, SBS modifier has replaced PE, SBR, and resin with its excellent modification effect. Such modifiers have become the main modified materials for asphalt. As the completed highways have been in service for many years and have entered the maintenance period, the amount of waste SBS asphalt mixture produced every year is quite large. At present, the research on the recycling of waste asphalt at home and abroad is mainly focused on the matrix asphalt, and the recycling of SBS modified asphalt. less research. The design life of expressways in my country is generally between 20 and 50 years, but due to the influence of climate, light, traffic ...

Claims

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Application Information

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IPC IPC(8): C08J11/04C08L95/00
CPCY02P20/143Y02W30/62
Inventor 韩君吴述祥李福建陶红顾泉峰周德洪
Owner JIANGSU BAOLI INT INVESTMENT CO LTD
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