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A surface-etched magnesium-aluminum-based layered double hydroxide modifier, ultraviolet aging-resistant asphalt and preparation method thereof

A double hydroxide, surface etching technology, applied in building structures, buildings, building components, etc., can solve the problems of easy agglomeration and poor asphalt compatibility, avoid agglomeration, improve compatibility, and improve dispersion. Effect

Inactive Publication Date: 2020-04-21
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to achieve the above purpose, the present invention uses strong acid to etch the magnesium-aluminum-based layered double hydroxide, and the surface etching not only solves the problem that the magnesium-aluminum-based layered double hydroxide is easy to agglomerate and has poor compatibility with asphalt , and can greatly improve the absorption capacity of magnesium-aluminum-based layered double hydroxides to ultraviolet rays. Applying surface-etched magnesium-aluminum-based layered double hydroxide modifiers to asphalt anti-aging modification can significantly improve the UV resistance of asphalt Aging performance

Method used

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  • A surface-etched magnesium-aluminum-based layered double hydroxide modifier, ultraviolet aging-resistant asphalt and preparation method thereof
  • A surface-etched magnesium-aluminum-based layered double hydroxide modifier, ultraviolet aging-resistant asphalt and preparation method thereof
  • A surface-etched magnesium-aluminum-based layered double hydroxide modifier, ultraviolet aging-resistant asphalt and preparation method thereof

Examples

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Effect test

Embodiment 1

[0022] modifier

[0023] A surface etching magnesium-aluminum-based layered double hydroxide modifier, the preparation method of which comprises the following steps: configuring deionized water and nitric acid to form an etching solution with a concentration of 0.1mol / L; and then mixing the etching solution with magnesium The aluminum-based layered double hydroxide is reacted at 50°C for 70 minutes at a mass ratio of 100:1. After the reaction is completed, the reactant is filtered and washed 3 times under reduced pressure, and then dried in an oven at a temperature of 70°C for 24 hours. , take out the dry solid, pulverize it in a high-speed pulverizer, and pass through a 200-mesh sieve to obtain a surface-etched magnesium-aluminum-based layered double hydroxide modifier.

[0024] UV-resistant asphalt

[0025] The surface-etched magnesium-aluminum-based layered double hydroxide modifier obtained in this example is applied to the preparation of UV-resistant aging asphalt, which...

Embodiment 2

[0031] modifier

[0032] A surface etching magnesium-aluminum-based layered double hydroxide modifier, the preparation method of which comprises the following steps: configuring deionized water and sulfuric acid into an etching solution with a concentration of 0.5mol / L; then mixing the etching solution with magnesium The aluminum-based layered double hydroxide is reacted at 50°C for 80 minutes at a mass ratio of 80:1. After the reaction is completed, the reactant is filtered and washed 3 times under reduced pressure, and then dried in an oven at a temperature of 70°C for 24 hours. , take out the dry solid, pulverize it in a high-speed pulverizer, and pass through a 200-mesh sieve to obtain a surface-etched magnesium-aluminum-based layered double hydroxide modifier.

[0033] UV-resistant asphalt

[0034]The surface-etched magnesium-aluminum-based layered double hydroxide modifier obtained in this example is applied to the preparation of UV-resistant aging asphalt, which specif...

Embodiment 3

[0040] modifier

[0041] A surface etching magnesium-aluminum-based layered double hydroxide modifier, the preparation method of which comprises the following steps: deionized water and nitric acid are configured to form an etching solution with a concentration of 0.3mol / L; then the etching solution is mixed with magnesium The aluminum-based layered double hydroxide is reacted at 60°C for 60 minutes at a mass ratio of 100:1. After the reaction is completed, the reactant is filtered and washed 3 times under reduced pressure, and then dried in an oven at a temperature of 70°C for 24 hours. , take out the dry solid, pulverize it in a high-speed pulverizer, and pass through a 200-mesh sieve to obtain a surface-etched magnesium-aluminum-based layered double hydroxide modifier.

[0042] UV-resistant asphalt

[0043] The surface-etched magnesium-aluminum-based layered double hydroxide modifier obtained in this example is applied to the preparation of UV-resistant aging asphalt, whic...

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Abstract

The invention discloses a surface-etched magnesium-aluminum-based layered double hydroxide modifier, an ultraviolet-resistant aging asphalt, and a preparation method of the ultraviolet-resistant agingasphalt. A strong acid is used to edit-modify the magnesium aluminum bases, and aggregation of magnesium-aluminum substrate layered double hydroxides can be effectively avoided, compatibility with asphalt is improved, and the ability to absorb ultraviolet is greatly improved; the modifier can be applied to asphalt antiaging modification in order to further effectively improve ultraviolet-resistant aging property of the modified asphalt.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a surface-etched magnesium-aluminum-based layered double hydroxide modifier, ultraviolet aging-resistant asphalt and a preparation method thereof. Background technique [0002] Asphalt pavement is widely used for its excellent road performance, driving comfort and easy maintenance. However, as an organic material, asphalt is prone to aging under the influence of natural environmental factors such as light, oxygen, and heat, especially under the irradiation of high-energy ultraviolet rays, the weak bonds in the asphalt molecules are easy to break, making the asphalt hard and brittle, resulting in The anti-cracking performance and fatigue resistance of asphalt mixture decrease, and the pavement is prone to cracks, ruts, potholes and other diseases. [0003] Adding modifiers to modify asphalt is one of the effective ways to improve the anti-ultraviolet aging performance ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08K9/02C08K7/00
CPCC08K7/00C08K9/02C08K2201/003C08L2201/08C08L95/00
Inventor 余剑英曹志龙吴敏韩晓斌薛理辉陈美祝
Owner WUHAN UNIV OF TECH
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