Magnesium-aluminum based layered double hydroxide aging resistant SBS (Styrene-Butadiene-Styrene Block Copolymer) modified asphalt and preparation method thereof

A double hydroxide, modified asphalt technology, applied in the direction of alumina/aluminum hydroxide, building structure, building components, etc., can solve the problems of asphalt pavement damage, shortening the service life of asphalt pavement, asphalt aging, etc., to prolong the The effect of improving the service life, improving the anti-ultraviolet aging performance, and improving the thermal stability

Active Publication Date: 2011-09-07
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among environmental factors, ultraviolet light can lead to asphalt aging and damage to asphalt pavement, especially in areas with high ultraviolet radiation intensity. Ultraviolet radiation has a more significant impact on asphalt structure and performance, which greatly shortens the use of asphalt pavement life

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Add 3.5 parts (parts by mass, the same below) star-shaped SBS to 90.4 parts of asphalt (base asphalt, softening point 47°C, penetration 65dmm) that has been heated to 170°C, keep the temperature at 165-175°C, at 5000rpm Stir for 1h at a rotating speed of 0.8 Al 0.2 (OH) 2 (CO 3 ) 0.1 1.8H 2 O, and surface-modified by γ-(methacryloxy)propyltrimethoxysilane, the particle size in the a and b directions is 1.8 μm, and the particle size in the c-axis direction is 0.12 μm), and the temperature is kept Stir at 165-175°C at a speed of 5000rpm for 1h, finally add 0.1 part of sulfur, keep the temperature at 160-170°C, and continue stirring at a speed of 2000rpm for 2h to obtain a magnesium-aluminum-based layered double hydroxide resistant Aged SBS modified bitumen.

Embodiment 2

[0027] Add 4.5 parts of linear SBS to 90.9 parts of base asphalt (softening point 46°C, penetration 76dmm) that has been heated to 165°C, keep the temperature at 160-170°C, stir at 4000rpm for 0.5h, then add 4.4 parts of magnesium-aluminum-based layered double hydroxide, keep the temperature at 160-170°C, stir at 4000rpm for 1h, then add 0.2 parts of sulfur, keep the temperature at 160-170°C, continue stirring at 1000rpm for 3h, That is, a magnesium-aluminum-based layered double hydroxide aging-resistant SBS modified asphalt is obtained.

Embodiment 3

[0032] Add 2.0 parts of star-shaped SBS and 2.2 parts of linear SBS to 92.65 parts of asphalt (softening point 46°C, penetration 86dmm) that has been heated to 175°C; keep the temperature at 170-180°C and stir at 4500rpm 1h, then add 3 parts of magnesium-aluminum-based layered double hydroxide, keep the temperature at 170-180°C, stir at 4500rpm for 1.5h, then add 0.15 parts of sulfur, keep the temperature at 170-180°C, and stir at 1500rpm Stirring was continued for 2 hours to obtain a magnesium-aluminum-based layered double hydroxide aging-resistant SBS modified asphalt.

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PUM

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Abstract

The invention relates to aging resistant SBS (Styrene-Butadiene-Styrene Block Copolymer) modified asphalt and a preparation method thereof. The aging resistant SBS modified asphalt is a magnesium-aluminum based layered double hydroxide aging resistant SBS modified asphalt prepared from the following raw materials by weight percent: 86.7%-94.95% of base asphalt, 3%-5% of polymer modifier SBS, 2%-8% of magnesium-aluminum based layered double hydroxide and 0.05%-0.3% of vulcanizer. In the preparation method, the magnesium-aluminum based layered double hydroxide with the ultraviolet physical shielding and chemical absorption functions is mixed with the SBS modified asphalt so as to obviously increase the ultraviolet aging resistance of the SBS modified asphalt.

Description

technical field [0001] The invention relates to an aging-resistant SBS modified asphalt and a preparation method thereof. Background technique [0002] Asphalt pavement is widely used in highway construction due to its advantages of comfortable driving, convenient maintenance, and good skid resistance. However, ordinary asphalt pavement is prone to rutting in summer and cracking in winter. In order to improve the high-temperature anti-rutting and low-temperature anti-crack performance of asphalt, various polymers are used to modify asphalt, among which SBS has the best effect on improving the high-low temperature performance of asphalt, and SBS modified asphalt has been widely used in high-grade highway construction. [0003] In recent years, with the new concept of long-life asphalt pavement, more and more attention has been paid to the durability of asphalt pavement. The factors affecting the durability of asphalt pavement mainly include environmental factors (heat, light...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L53/02C08K9/06C08K3/22C08K3/06C01F7/02
Inventor 吴少鹏王金山余剑英庞凌陈美祝韩君冯振刚
Owner WUHAN UNIV OF TECH
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