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A kind of modified asphalt and preparation method thereof

A technology of modified asphalt and matrix asphalt, used in building components, building insulation materials, buildings, etc., can solve the problems of weak anti-oxidation effect and poor anti-aging effect, so as to improve the anti-oxidation performance, not easy to rut, and improve the anti-aging effect. performance effect

Active Publication Date: 2020-11-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The modifier composed of carbon nanotubes and nano ceria makes the asphalt have good high and low temperature resistance, but as for the anti-aging performance, only the nano ceria has a strong absorption capacity for ultraviolet rays, which can significantly improve the asphalt pavement. Anti-ultraviolet ability to prevent the aging of asphalt, but the anti-oxidation effect on oxygen and ozone is weak, and the anti-aging effect is poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Mix 1 part by weight of MCM-41 mesoporous molecular sieve (with a specific surface area of ​​1000 m 2 / g), γ-mercaptopropyltrimethoxysilane accounting for 5wt% of MCM-41 mesoporous molecular sieve was added to 20 parts by weight of toluene. Keep the temperature at 110°C, keep stirring, heat and reflux for 3 hours, filter after cooling, wash with a large amount of ethanol, and dry at 100°C for 5 hours to obtain a surface-modified mesoporous molecular sieve.

[0031] (2) Add 0.8 parts by weight of surface-modified mesoporous molecular sieves and 0.2 parts by weight of 2,6-di-tert-butyl-p-cresol to 100 parts by weight of molten base pitch (vacuum residue, with a penetration of 93 1 at 25°C / 10mm), at 140°C, continue stirring for 0.75h, so that the two are evenly dispersed in the matrix asphalt, and the surface-modified mesoporous molecular sieve modified asphalt can be obtained.

Embodiment 2

[0033] (1) Add 1 part by weight of MCM-48 mesoporous molecular sieve (with a specific surface area of ​​800 m 2 / g), γ-mercaptopropyltriethoxysilane accounting for 8wt% of MCM-48 mesoporous molecular sieve was added to 20 parts by weight of toluene. Keep the temperature at 120°C, keep stirring, heat to reflux for 2 hours, filter after cooling, wash with a large amount of ethanol, and dry at 100°C for 5 hours to obtain a surface-modified mesoporous molecular sieve.

[0034] (2) Add 0.5 parts by weight of surface-modified mesoporous molecular sieves and 0.5 parts by weight of 4,4'-thiobis(6-tert-butyl-3-methylphenol) to 100 parts by weight of molten base pitch (vacuum slag Oil, penetration at 25°C is 93 1 / 10mm), at 130°C, keep stirring for 1 hour, so that the two are evenly dispersed in the base asphalt, and the surface modified mesoporous molecular sieve modified asphalt can be obtained.

Embodiment 3

[0036] (1) 1 part by weight of SBA-15 mesoporous molecular sieve (with a specific surface area of ​​1100 m 2 / g), γ-mercaptopropylmethyldiethoxysilane accounting for 10wt% of SBA-15 mesoporous molecular sieve was added to 20 parts by weight of toluene. Keep the temperature at 120°C, keep stirring, heat and reflux for 3 hours, filter after cooling, wash with a large amount of ethanol, and dry at 100°C for 5 hours to obtain a surface-modified mesoporous molecular sieve.

[0037] (2) Add 0.2 parts by weight of surface-modified mesoporous molecular sieves and 0.8 parts by weight of β-(3,5-di-tert-butyl-4-hydroxyphenyl) to 100 parts by weight of molten base pitch (vacuum residue, 25 ℃ penetration of 93 1 / 10mm), at 140 ℃, continue to stir for 0.75h, so that the two are evenly dispersed in the base asphalt, and the surface modified mesoporous molecular sieve modified asphalt can be obtained.

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Abstract

The invention discloses a modified asphalt and a preparation method thereof. The modified asphalt comprises, by weight, 100 parts of matrix asphalt, 0.1-1 part of a surface-modified meso-porous molecular sieve and 0.1-1 part of an antioxidant, wherein the surface-modified meso-porous molecular sieve is a mercaptosilane-modified meso-porous molecular sieve. The asphalt is modified with the mercaptosilane surface-modified meso-porous molecular sieve, and the modified asphalt and the main antioxidant have synergistic effects, so the ageing resistance is greatly improved, and the asphalt has a high 60 DEG C viscosity and a very high low-temperature ductility, thereby ruts in summer and frost cracks in winter are avoided.

Description

technical field [0001] The invention relates to a modified asphalt and a preparation method thereof, in particular to a modified asphalt for roads and a preparation method thereof. Background technique [0002] Asphalt is an important road paving material, but limited by its own performance, the high and low temperature performance of asphalt is unstable. Under the strong sunlight in summer, the asphalt is easy to soften, causing rutting and wrapping; in cold winter, cracks are easy to appear, which seriously affects the comfort of driving on the road and the service life of the road. With the development of transportation in the direction of high speed, heavy load, large flow, and channelization, not only the roadbed is required to be solid and firm, but also the road surface is required to have functions such as wear resistance, high temperature resistance, softening resistance, and smoothness. The research and application of high-performance modified asphalt has become a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08K9/06C08K7/26C08K5/13C08K5/375
CPCC08K5/13C08K5/372C08K7/26C08K9/06C08L95/00
Inventor 宋乐春陈保莲范思远张静程国香宁爱民李志军
Owner CHINA PETROLEUM & CHEM CORP
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