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Magnesium-aluminum-based layered double hydroxide/SBR composite modifier, modified asphalt and preparation method of modifier

A technology of double hydroxide and compound modifier, which is applied in the direction of building structure, building components, building insulation materials, etc., can solve the problem that the asphalt pavement is prone to disease, it is difficult to uniformly disperse SBR modified asphalt, and affect SBR modification Asphalt UV protection and other issues, to achieve the effect of improving the anti-ultraviolet aging ability, good UV protection effect, and good UV protection effect

Inactive Publication Date: 2014-11-12
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, many areas in western my country have high altitudes and high ultraviolet radiation intensity, which can easily cause the aging of SBR modified asphalt, leading to SBR degradation and asphalt oxidative condensation, which deteriorates the performance of modified asphalt, and the asphalt pavement is prone to diseases, especially The aging degradation of SBR caused by ultraviolet light significantly reduces the low-temperature ductility of modified asphalt, causing cracks in the asphalt pavement in winter, and severe water damage is prone to occur under the action of summer rain, resulting in cracks and potholes in the asphalt pavement. , greatly reducing the service life of asphalt pavement
[0003] In order to improve the anti-ultraviolet aging performance of SBR modified asphalt, the patent CN 102181162 A discloses a magnesium-aluminum-based layered double hydroxide anti-aging SBR modified asphalt, and the magnesium-aluminum-based layered double hydroxide has excellent UV resistance The shielding effect can improve the anti-ultraviolet aging ability of SBR modified asphalt. However, since the magnesium-aluminum-based double hydroxide is an inorganic powder, on the one hand, the apparent density of the powdered magnesium-aluminum-based double hydroxide is very small. After being added to the reaction tank, it is suspended on the surface of SBR modified asphalt, and it is difficult to form a uniform dispersion with SBR modified asphalt. On the other hand, the compatibility between inorganic magnesium-aluminum-based double hydroxide and SBR modified asphalt is poor Aluminum-based layered double hydroxides are prone to sedimentation in SBR modified asphalt, which seriously affects the UV protection effect of magnesium-aluminum-based layered double hydroxides on SBR modified asphalt

Method used

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  • Magnesium-aluminum-based layered double hydroxide/SBR composite modifier, modified asphalt and preparation method of modifier
  • Magnesium-aluminum-based layered double hydroxide/SBR composite modifier, modified asphalt and preparation method of modifier
  • Magnesium-aluminum-based layered double hydroxide/SBR composite modifier, modified asphalt and preparation method of modifier

Examples

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Effect test

Embodiment 1

[0028] Put 55 parts (parts by mass, the same below) of SBR, 30 parts of surface organically modified magnesium-aluminum-based layered double hydroxide, 0.3 parts of tetraisobutylthiuram monosulfide and 14.7 parts of catalytic cracking oil slurry at a temperature of Mix in a high-speed mixer at 85°C for 10 minutes, then put the blend into a single-screw extruder to extrude and pelletize. Modifier.

[0029] Heat 93.5 parts of road petroleum asphalt (penetration of 86dmm at 25°C, softening point of 46.1°C) to 160°C, add it into the reaction tank with agitator and asphalt colloid mill, start the agitator, and pour into it while stirring Add 6.5 parts of the magnesium-aluminum-based layered double hydroxide / SBR composite modifier prepared above, keep the reaction temperature at 160°C±5°C, and stir for 5 minutes to make the magnesium-aluminum-based layered double hydroxide / SBR composite modifier Mix evenly with the asphalt, then start the colloid mill, grind for 30 minutes, stop th...

Embodiment 2

[0035]59 parts of SBR, 30 parts of surface organically modified magnesium-aluminum-based layered double hydroxide, 0.5 parts of tetraethylthiuram disulfide and 10.5 parts of catalytic cracking oil slurry were placed in a high-speed mixer at a temperature of 85 ° C and blended for 10 Minutes, and then put the blend into a single-screw extruder to extrude and granulate, and the head temperature is about 160°C to obtain a magnesium-aluminum-based double hydroxide / SBR composite modifier.

[0036] Heat 92 parts of road petroleum asphalt (penetration of 73dmm at 25°C and softening point of 48.1°C) to 160°C, add it to the reaction tank with agitator and asphalt colloid mill, start the agitator, and pour into it while stirring Add 8 parts of the magnesium-aluminum-based layered double hydroxide / SBR composite modifier prepared above, keep the reaction temperature at 160°C±5°C, and stir for 5 minutes to make the magnesium-aluminum-based layered double hydroxide / SBR composite modifier Mi...

Embodiment 3

[0042] Put 52 parts of SBR, 35 parts of surface organically modified magnesium-aluminum-based layered double hydroxide, 0.2 parts of tetraisobutylthiuram monosulfide and 12.8 parts of catalytic cracking oil slurry in a high-speed mixer at a temperature of 85 ° C. Mix for 10 minutes, and then put the blend into a single-screw extruder to extrude and granulate. The head temperature is about 160°C to obtain a magnesium-aluminum-based double hydroxide / SBR composite modifier.

[0043] Heat 89 parts of road petroleum asphalt (penetration of 61dmm at 25°C and softening point of 52.1°C) to 160°C, add it into the reaction tank with agitator and asphalt colloid mill, start the agitator, and pour into it while stirring Add 11 parts of the magnesium-aluminum-based layered double hydroxide / SBR composite modifier prepared above, keep the reaction temperature at 160°C±5°C, and stir for 5 minutes to make the magnesium-aluminum-based layered double hydroxide / SBR composite modifier Mix evenly w...

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Abstract

The invention relates to a magnesium-aluminum-based layered double hydroxide / SBR composite modifier, modified asphalt and a preparation method of the modifier. The magnesium-aluminum-based layered double hydroxide / SBR composite modifier is prepared by mixing SBR, surface organic modified magnesium-aluminum-based layered double hydroxide, an accelerant and a compatilizer in a high speed, and performing extrusion pelleting. The ultraviolet aging resisting SBR modified asphalt is prepared by fusing and blending asphalt and the magnesium-aluminum-based layered double hydroxide / SBR composite modifier. The magnesium-aluminum-based layered double hydroxide / SBR composite modifier is prepared by performing composite reaction on the surface-modified magnesium-aluminum-based layered double hydroxide, the SBR, the accelerant and the compatilizer; after the composite modifier is added into the asphalt, the ultraviolet aging resistance of the SBR and the asphalt can be remarkably improved, long-term stable dispersion of the SBR and the magnesium-aluminum-based layered double hydroxide in the asphalt is achieved, and the prepared SBR modified asphalt is excellent in ultraviolet aging resistance.

Description

technical field [0001] The invention relates to a magnesium-aluminum-based layered double hydroxide / SBR composite modifier, modified asphalt and a preparation method thereof. Background technique [0002] SBR modified asphalt pavement has excellent low temperature crack resistance and is widely used in the severe cold regions of western my country. However, many areas in western my country have high altitudes and high ultraviolet radiation intensity, which can easily cause the aging of SBR modified asphalt, leading to SBR degradation and asphalt oxidative condensation, which deteriorates the performance of modified asphalt, and the asphalt pavement is prone to diseases, especially The aging degradation of SBR caused by ultraviolet light significantly reduces the low-temperature ductility of modified asphalt, causing cracks in the asphalt pavement in winter, and severe water damage is prone to occur under the action of summer rain, resulting in cracks and potholes in the aspha...

Claims

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Application Information

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IPC IPC(8): C08L9/06C08K13/06C08K9/06C08K3/22C08K5/40C08L95/00
Inventor 余剑英徐松章灿林吴伟飞高丽吴红周吉彭超尹印孙育斌
Owner WUHAN UNIV OF TECH
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