Anti-aging additive for improving asphalt aging characteristic and preparation method of anti-aging asphalt

An aging performance and anti-aging technology, applied in building components, building insulation materials, buildings, etc., can solve the problems of asphalt pavement becoming hard and brittle, prone to disease, shortening service life, etc., to achieve improved light aging performance and superior barrier performance effect

Inactive Publication Date: 2013-11-27
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is generally believed that asphalt mixture will undergo short-term thermo-oxidative aging during the process of mixing, paving and compacting, which will cause the performance of asphalt to deteriorate rapidly in a short period of time. Infrared and ultraviolet radiation, asphalt will undergo long-term thermal aging and ultraviolet aging, resulting in a series of complex physical and chemical changes in asphalt, resulting in hard and brittle asphalt pavement, which is prone to disease and greatly affects the performance of asphalt pavement , shortening its service life

Method used

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  • Anti-aging additive for improving asphalt aging characteristic and preparation method of anti-aging asphalt
  • Anti-aging additive for improving asphalt aging characteristic and preparation method of anti-aging asphalt
  • Anti-aging additive for improving asphalt aging characteristic and preparation method of anti-aging asphalt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 75 parts (parts by mass, the same below) of organic montmorillonite, 8 parts of tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester, 5 parts of tris[2,4 -di-tert-butylphenyl]phosphite, 6 parts of 2-(2'-hydroxy-3'-tert-butyl-5'-methylphenyl)-5-chlorobenzotriazole and 6 parts of bis (2,2,6,6-tetramethyl-4-piperidinyl) sebacate is placed in a metal container with a top cover, and at room temperature utilizes a stirrer to stir at a rate of 1000rpm for 3min to obtain Anti-aging additives to improve the aging properties of bitumen.

[0025] The organic montmorillonite is obtained by organically intercalating sodium-based montmorillonite with cetyltrimethylammonium bromide, and the fineness of the organic montmorillonite is 200-400 mesh.

[0026] Heat 95 parts by mass of asphalt A (the said asphalt is road petroleum asphalt, with a penetration of 73dmm at 25°C and a softening point of 46.3°C) to 145-150°C, add 5 parts by mass of the above-mentione...

Embodiment 2

[0031] 75 parts of organic montmorillonite, 8 parts of tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester, 5 parts of tris[2,4-di-tert-butylphenyl ] phosphite, 6 parts of 2-hydroxy-4-n-octyloxybenzophenone and 6 parts of bis(2,2,6,6-tetramethyl-4-piperidinyl) sebacate In a metal container with a top cover, use a stirrer to stir at a rate of 1000 rpm for 3 minutes at room temperature to obtain an anti-aging additive for improving the aging performance of asphalt.

[0032] Heat 95 parts by mass of asphalt B (the said asphalt is road petroleum asphalt, with a penetration of 71dmm at 25°C and a softening point of 47.1°C) to 145-150°C, add 5 parts by mass of the above-mentioned anti-aging agent, and run at 4000rpm Stir for 30 minutes at a rotating speed to obtain aging-resistant asphalt. As a comparison sample, the asphalt was directly stirred at a temperature of 145-150°C at a speed of 4000rpm for 30 minutes, or 5 parts by mass of organic montmorillo...

Embodiment 3

[0037]78 parts of organic montmorillonite, 6 parts of tetrakis [β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester, 4 parts of tris[2,4-di-tert-butylphenyl ] phosphite, 4 parts 2-hydroxy-4-n-octyloxybenzophenone, 3 parts 2-(2'-hydroxy-3'-tert-butyl-5'-methylphenyl)-5- Chlorobenzotriazole and 5 parts of bis(2,2,6,6-tetramethyl-4-piperidinyl) sebacate were placed in a metal container with a top cover, and the Stirring at a rate of 1000 rpm for 3 minutes, the anti-aging additive for improving the aging performance of asphalt is obtained.

[0038] Heat 93 parts by mass of bitumen C (the said bitumen is road petroleum asphalt, with a penetration of 92dmm at 25°C and a softening point of 44.3°C) to 145-150°C, add 7 parts by mass of the above-mentioned anti-aging agent, at 4000rpm Stir for 30 minutes at a rotating speed to obtain aging-resistant asphalt. As a comparison sample, the asphalt was directly stirred at a speed of 4000 rpm for 30 minutes at a temperat...

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Abstract

The invention relates to an anti-aging additive for improving asphalt aging characteristic and a preparation method of an anti-aging asphalt. The anti-aging additive is characterized by being prepared by evenly compounding organic montmorillonite, an antioxidant and a light stabilizer in a mechanical stirring manner, wherein the anti-aging additive comprises the following raw materials by mass percent of 72% to 84% of organic montmorillonite, 8% to 14% of antioxidant and 8% to 14% of light stabilizer. The anti-aging asphalt is prepared by the melt blending of 90% to 99% of asphalt and 1% to 10% of the anti-aging additive. According to the performance characteristics of the different raw materials in the invention, the anti-aging additive which has the good thermal stability and can obviously improve the thermo-aging resistance, the oxidative-aging resistance and the light-aging resistance of the asphalt is compounded; the anti-aging asphalt which has the good compatibility is prepared from the anti-aging additive, so that the synergetic effects on improving the thermo-oxidative aging resistance and the light-oxidative aging resistance of the different asphalts are achieved. The anti-aging asphalt prepared from the anti-aging additive is not only good in thermo-oxidative aging resistance but also excellent in light-oxidative aging resistance.

Description

technical field [0001] The invention relates to an anti-aging additive for improving the aging performance of asphalt and a preparation method of anti-aging asphalt. Background technique [0002] The aging of asphalt is one of the main causes of diseases of asphalt concrete pavement. It is generally believed that asphalt mixture will undergo short-term thermo-oxidative aging during the process of mixing, paving and compacting, which will cause the performance of asphalt to deteriorate rapidly in a short period of time. Infrared and ultraviolet radiation, asphalt will undergo long-term thermal aging and ultraviolet aging, resulting in a series of complex physical and chemical changes in asphalt, resulting in hard and brittle asphalt pavement, which is prone to disease and greatly affects the performance of asphalt pavement , shortening its service life. [0003] Modification of asphalt materials with additives is one of the effective ways to improve the aging resistance of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08K9/04C08K7/00C08K3/34
Inventor 余剑英冯振刚吴少鹏庞凌周吉贾晓娟章灿林徐海露姜城成
Owner WUHAN UNIV OF TECH
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