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Aging resistance SBR (Styrenebutadiene rubber) modified road asphalt of magnalium base layer double hydroxide and preparation method of asphalt

A technology of double hydroxide and road asphalt, which is applied in the direction of building structure, building components, building insulation materials, etc., can solve the problems that are difficult to realize, and the effect of anti-ultraviolet aging performance is limited, so as to prolong the service life and improve the anti-ultraviolet Aging performance, effect to achieve long-term effectiveness

Active Publication Date: 2011-09-14
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, CeO 2 Nanoparticles must form nanoscale dispersion in asphalt to have the ability to resist ultraviolet rays, but CeO 2 Nanoscale dispersion of nanoparticles in asphalt is difficult to achieve in industrial production
However, UV531 only has a single chemical absorption for ultraviolet rays, and its effect on improving the anti-ultraviolet aging performance of SBR modified road asphalt is limited

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Add 4.5 parts (parts by mass, the same below) of styrene-butadiene rubber (SBR) to 93.3 parts of asphalt (softening point 46.5°C, penetration 83dmm) that has been heated to 160°C, and keep the temperature at 150-160°C, at 5000rpm Stirring for 1h at a rotating speed of 1 h, adding 2 parts of magnesium-aluminum-based layered double hydroxide [that is, magnesium-aluminum-based layered double hydroxide whose surface is modified by sodium carboxymethyl cellulose (composed of: Mg 0.67 al 0.33 (OH) 2 (CO 3 ) 0.17 0.6H 2 O, the particle size in the a and b directions is 0.2 μm, and the grain thickness in the c-axis direction is 0.06 μm, the same below)], keep the temperature at 150-160 ° C, stir and react at a speed of 3000 rpm for 0.5 h, and then Add 0.2 parts of methacrylic acid as a modification additive, keep the temperature at 150-160°C, and continue stirring at a speed of 2000 rpm for 2 hours to obtain a magnesium-aluminum layered double hydroxide aging-resistant SBR ...

Embodiment 2

[0024] Add 3.8 parts of styrene-butadiene rubber (SBR) to 92.55 parts of asphalt (softening point 46.5 °C, penetration 83 dmm) that has been heated to 160 ° C, keep the temperature at 150 ~ 160 ° C, stir at 4000 rpm for 1 hour, add 3.5 parts of magnesium-aluminum-based layered double hydroxide, keep the temperature at 150-160°C, stir and react at a speed of 3000rpm for 0.5h, then add 0.15 parts of modification additive methacrylic acid, keep the temperature at 150-160°C, Stirring was continued for 2 hours at a rotational speed of 1500 rpm, and a magnesium-aluminum-based double hydroxide aging-resistant SBR modified road asphalt was obtained.

[0025] UV aging test was carried out on the magnesium-aluminum layered double hydroxide aging-resistant SBR modified road asphalt. The viscosity of the magnesium-aluminum layered layered double hydroxide aging-resistant SBR modified road asphalt before and after ultraviolet aging at 135°C increased from 800cp to 1890cp , an increase of 1...

Embodiment 3

[0027] Add 3.6 parts of styrene-butadiene rubber (SBR) to 91.2 parts of asphalt (softening point 51.5°C, penetration 68dmm) that has been heated to 160°C, keep the temperature at 150-160°C, stir at 5000rpm for 1 hour, add 5 parts of magnesium-aluminum-based layered double hydroxide, keep the temperature at 150-160°C, stir and react at a speed of 3000rpm for 1h, then add 0.2 parts of modification additive (methacrylic acid), keep the temperature at 150-160°C, Stirring was continued for 2 hours at a rotational speed of 1000 rpm, and a magnesium-aluminum-based double hydroxide aging-resistant SBR modified road asphalt was obtained.

[0028] UV aging test was carried out on the magnesium-aluminum layered double hydroxide aging-resistant SBR modified road asphalt, and the viscosity of the magnesium-aluminum layered layered double hydroxide aging-resistant SBR modified road asphalt before and after ultraviolet aging at 135°C increased from 830cp to 1790cp , an increase of 960cp, the...

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Abstract

The invention relates to an aging resistance SBR modified road asphalt of magnalium base layer double hydroxide and a preparation method of the asphalt. The aging resistance SBR modified road asphalt of magnalium base layer double hydroxide is characterized by preparation from asphalt, SBR modifier, magnalium base layer double hydroxide and modified auxiliary. The mass percentage of all raw materials is as follows: 88.7-96.9% of asphalt, 2-5% of SBR modifier, 1-6% of magnalium base layer double hydroxide and 0.1-0.3% of modified auxiliary. By using the function of magnalium base layer double hydroxide in shielding and chemical absorption of multilayer physical scattering of ultraviolet rays, the invention can greatly promote the anti-ultraviolet ageing capacity of the SBR modified road asphalt and prolong the service life of asphalt road surfaces, with a wide application prospect.

Description

technical field [0001] The invention relates to an aging-resistant SBR modified road asphalt and a preparation method thereof. Background technique [0002] SBR can significantly improve the low temperature performance of road asphalt, making SBR modified road asphalt widely used in low temperature and cold regions. However, the SBR modified road asphalt will harden and crack under the action of ultraviolet rays, which will lead to cracks, peeling, pits and other damages on the asphalt pavement, which will seriously affect the service life of the asphalt pavement. In particular, the ultraviolet intensity in the western plateau area, which accounts for 2 / 3 of my country's land area, is 3 to 4 times that of other areas. The UV aging problem of SBR modified road asphalt in these areas is more prominent. Therefore, it is urgent to improve the UV aging resistance of SBR modified road asphalt. [0003] Chinese patent 200810204209.4 proposes to add CeO which can absorb ultraviole...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L9/06C08K13/06C08K9/04C08K3/26C08K5/09
Inventor 吴少鹏庞凌余剑英陈美祝张恒龙王金山黄永方
Owner WUHAN UNIV OF TECH
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