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Catalytic reaction type SBS modified asphalt regenerant and preparation method thereof

A modified asphalt, catalytic reaction technology, used in building components, building insulation materials, construction and other directions, can solve the problems of inability to recover SBS, softening point and low temperature ductility recovery, etc., to achieve improved performance, chemical composition and molecular Easy structure and improved performance

Inactive Publication Date: 2014-05-28
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing regenerants are basically developed for the regeneration of aged asphalt. They mainly restore the chemical composition and colloidal structure of aged asphalt by adding high aromatic components, but cannot restore the molecular structure of SBS. The softening point and recovery of low temperature ductility are extremely limited

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Weighed 27 parts by mass of SBS modified asphalt (softening point of 72 °C, ductility of 35 cm at 5 °C) and 66 parts by mass of catalytic cracking oil slurry (mass content of aromatic components: 58%), both at a temperature of 145 °C, After mixing, stir at 145°C±5°C and 150 rpm for 15min, then add 3.98 parts by mass of furfural (penetrating agent), 3 parts by mass of SBS molecular structure restorer, 0.02 parts by mass of 4-dimethylaminopyridine, Keep the temperature at 145°C and continue to stir at 150 rpm for 10 minutes to obtain a catalytic reaction type SBS modified asphalt regenerant.

[0026] Weigh 93 parts by mass of aged SBS modified asphalt heated to 160°C, add 7 parts of the above-mentioned catalytic reaction type SBS modified asphalt rejuvenator, keep the temperature at 160°C, and stir at 200rpm for 5min to obtain the regenerated SBS modified asphalt asphalt. The performance test of the recycled SBS modified asphalt shows that the softening point is 70°C, th...

Embodiment 2

[0032]Weighed 27 parts by mass of SBS modified asphalt (softening point of 72 °C, ductility of 35 cm at 5 °C) and 64 parts by mass of catalytic cracking oil slurry (mass content of aromatic components: 58%), both at a temperature of 145 °C, After mixing, stir at 145°C±5°C and 150 rpm for 15min, then add 3.97 parts by mass of furfural, 5 parts by mass of SBS molecular structure restorer and 0.03 parts by mass of catalyst (4-dimethylaminopyridine), keeping The temperature was 145°C, and the stirring was continued for 10 minutes at a speed of 150 rpm to obtain a catalytic reaction type SBS modified asphalt regenerant.

[0033] Weigh 93 parts by mass of aged SBS modified asphalt heated to 160°C, add 7 parts of the above-mentioned catalytic reaction type SBS modified asphalt rejuvenator, keep the temperature at 160°C, and stir at 200rpm for 5min to obtain the regenerated SBS modified asphalt asphalt. The performance test of the recycled SBS modified asphalt shows that the softenin...

Embodiment 3

[0036] Weighed 27 parts by mass of SBS modified asphalt (softening point of 72 °C, ductility of 35 cm at 5 °C) and 66 parts by mass of catalytic cracking oil slurry (mass content of aromatic components: 63%), both at a temperature of 145 °C, After mixing, stir at 145°C±5°C and 150 rpm for 15min, then add 3.97 parts by mass of furfural, 3 parts by mass of SBS molecular structure restorer and 0.03 parts by mass of catalyst (4-dimethylaminopyridine), keeping The temperature was 145°C, and the stirring was continued for 10 minutes at a speed of 150 rpm to obtain a catalytic reaction type SBS modified asphalt regenerant.

[0037] Weigh 93 parts by mass of aged SBS modified asphalt heated to 160°C, add 7 parts of the above-mentioned catalytic reaction type SBS modified asphalt rejuvenator, keep the temperature at 160°C, and stir at 200rpm for 5min to obtain the regenerated SBS modified asphalt asphalt. The performance test of the recycled SBS modified asphalt shows that the softeni...

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Abstract

The invention relates to a catalytic reaction type SBS modified asphalt regenerant and a preparation method thereof. The catalytic reaction type SBS modified asphalt regenerant is prepared from raw materials by mass: 15%-35% of SBS modified asphalt, 55%-80% of catalytic cracking oil slurry, 1%-5% of a penetrating agent, 3%-8% of a SBS molecular structure restorative agent and 0.01%-0.05% of a catalyst. The regenerant provided by the invention can not only reduce chemical compositions and colloid structure of aged asphalt but also make aged and degraded SBS molecular chain structure restore well under the effect of the molecular structure restorative agent and the catalyst, thereby significantly increasing the performance of the regenerated SBS modified asphalt. The regenerant can relatively well improve the performance of the aged SBS modified asphalt.

Description

technical field [0001] The invention belongs to the regeneration and utilization of waste asphalt concrete in road engineering, in particular to a catalytic reaction type SBS modified asphalt regeneration agent and a preparation method thereof. Background technique [0002] Asphalt concrete pavement has the advantages of smooth surface, low vibration, low noise, comfortable driving, short construction period, easy maintenance and repair, etc., and is widely used in road construction. Compared with ordinary asphalt, thermoplastic elastomer SBS modified asphalt has better high and low temperature performance. In recent years, high-grade highway construction has mainly used SBS modified asphalt concrete. [0003] Although asphalt concrete has excellent road performance, asphalt pavement will be affected by factors such as heat, oxygen, and ultraviolet light during use, which will cause asphalt to age, and then under the action of ambient temperature and driving load, cracks wil...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L53/02C08K5/00C08K5/01C08K5/1535C08K5/1515
Inventor 余剑英秦德峰徐松章灿林吴伟飞吴红杨慧
Owner WUHAN UNIV OF TECH
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