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Asphalt concrete additive with ultraviolet aging resistance, and preparation method thereof

A technology for anti-ultraviolet aging and asphalt concrete, applied in the field of asphalt concrete additives and preparation thereof, can solve the problems of weakening the low-temperature performance of asphalt mixture, reducing the low-temperature performance of asphalt concrete, insufficient anti-ultraviolet aging performance, etc., so as to improve the anti-ultraviolet aging performance. , Improve anti-rutting performance, improve the effect of anti-ultraviolet aging efficiency

Active Publication Date: 2018-08-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The additive prepared by this method can significantly improve the anti-rutting performance of asphalt concrete, but weakens the low-temperature performance of asphalt mixture to a certain extent, and also has the problem of insufficient anti-ultraviolet aging performance
[0006] In summary, although the existing technology can improve the anti-rutting performance of asphalt concrete to a certain extent, there are problems of reducing the low-temperature performance of asphalt concrete and insufficient anti-ultraviolet aging performance

Method used

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  • Asphalt concrete additive with ultraviolet aging resistance, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] (1) 5 parts by weight of MCM-41 mesoporous molecular sieve (with a specific surface area of ​​1000 m 2 / g), γ-chloropropyltrimethoxysilane accounting for 5wt% of MCM-41 mesoporous molecular sieve was added to 100 parts by weight of toluene. Keep the temperature at 110°C, keep stirring, heat to reflux for 3h, filter after cooling, wash with ethanol, and dry at 100°C for 5h to obtain mesoporous molecular sieve grafted with chlorosilane.

[0044] (2) Add 5 parts by weight of chlorosilane-grafted mesoporous molecular sieves and 6 wt% of 2,2,6,6-tetramethylpiperidinamine to 100 parts by weight of ethanol. Keep the temperature at 78°C, keep stirring, heat to reflux for 6h, filter after cooling, wash with ethanol, and dry at 100°C for 8h to obtain the modified mesoporous molecular sieve.

[0045] (3) Copolymerize 100 parts by weight of high-density polyethylene (melt flow index is 2 g / 10 min), 10 parts by weight of polypropylene (melt flow index is 10 g / 10 min), and 5 parts by...

Embodiment 2

[0047] (1) 7 parts by weight of SBA-16 mesoporous molecular sieve (with a specific surface area of ​​900 m 2 / g), γ-chloropropyltriethoxysilane accounting for 10wt% of SBA-16 mesoporous molecular sieve was added to 140 parts by weight of xylene. Keep the temperature at 110°C, keep stirring, heat to reflux for 3h, filter after cooling, wash with ethanol, and dry at 100°C for 5h to obtain mesoporous molecular sieve grafted with chlorosilane.

[0048] (2) Add 7 parts by weight of chlorosilane-grafted mesoporous molecular sieves and 13 wt% of 4-benzoyloxy-2,2,6,6-tetramethylpiperidine to 140 parts by weight of chloroform . Keep the temperature at 61°C, keep stirring, heat to reflux for 6h, filter after cooling, wash with chloroform, and dry at 100°C for 5h to obtain a modified mesoporous molecular sieve.

[0049] (3) Copolymerize 100 parts by weight of high-density polyethylene (melt flow index is 8 g / 10 min), 15 parts by weight of polypropylene (melt flow index is 15 g / 10 min),...

Embodiment 3

[0051] (1) Add 10 parts by weight of SBA-15 mesoporous molecular sieve (with a specific surface area of ​​1100 m2 / g) and chloromethyltriethoxysilane accounting for 15 wt% of SBA-15 mesoporous molecular sieve to 200 parts by weight of toluene. Keep the temperature at 110°C, keep stirring, heat to reflux for 3h, filter after cooling, wash with ethanol, and dry at 100°C for 5h to obtain mesoporous molecular sieve grafted with chlorosilane.

[0052] (2) Add 10 parts by weight of chlorosilane-grafted mesoporous molecular sieve and 19 wt% of 2,2,6,6-tetramethylpiperidinamine to 200 parts by weight of ethanol. Keep the temperature at 78°C, keep stirring, heat to reflux for 8h, filter after cooling, wash with ethanol, and dry at 100°C for 8h to obtain the modified mesoporous molecular sieve.

[0053] (3) Copolymerize 100 parts by weight of high-density polyethylene (melt flow index is 15 g / 10 min), 20 parts by weight of polypropylene (melt flow index is 10 g / 10 min), and 10 parts by w...

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Abstract

The invention discloses an asphalt concrete additive with ultraviolet aging resistance, and a preparation method thereof, wherein the modified asphalt comprises, by weight, 100 parts of high density polyethylene, 10-20 parts of polypropylene, 5-10 parts of an acetic acid-vinyl acetate copolymer, 10-15 parts of SBS, and 5-10 parts of a modified mesoporous molecular sieve, wherein the modified mesoporous molecular sieve is a mesoporous molecular sieve modified with chlorosilane and a light stabilizer. According to the present invention, with the asphalt concrete additive, the rutting resistanceand the low temperature performance of the asphalt concrete can be significantly improved, and the ultraviolet aging resistance can be substantially improved, such that the asphalt concrete has excellent light stability.

Description

technical field [0001] The invention relates to an asphalt concrete additive and a preparation method thereof, in particular to a high-modulus asphalt concrete additive with anti-ultraviolet aging performance and a preparation method thereof. Background technique [0002] With the continuous increase of traffic flow on high-grade highways, as well as the increasingly heavy load of transport vehicles and the channelization of traffic flow, rutting has become the main form of road surface damage, which seriously affects the comfort of road driving and the service life of roads. The research and application of high-performance modified asphalt has become an urgent requirement for pavement construction. [0003] At present, it is an effective means to prevent rutting by increasing the stiffness modulus of asphalt mixture. The techniques used in this technology mainly include the use of high-viscosity hard asphalt binders and the addition of natural asphalt or polyolefin additiv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/26C04B20/02C04B14/04
CPCC04B20/023C04B40/0039C04B24/2611C04B24/2623C04B24/2676C04B14/04C04B26/26
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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