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Asphalt concrete additive and preparation method thereof

An asphalt concrete and additive technology, which is applied in the field of high modulus asphalt concrete additives and its preparation, can solve the problems of insufficient anti-aging performance, reducing the low-temperature performance of asphalt concrete, weakening the low-temperature performance of asphalt mixture, etc., so as to improve the anti-aging performance, The effect of improving rutting resistance and low temperature performance, and improving compatibility

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-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-aging performance

Method used

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  • Asphalt concrete additive and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0038] (1) 10 parts by weight of MCM-41 mesoporous molecular sieve (with a specific surface area of ​​1000 m 2 / g), 0.4 parts by weight of disodium tetrasulfide were added to 100 parts by weight of toluene. Heating to 50°C, adding 0.5 parts by weight of γ-chloropropyltrimethoxysilane dropwise, raising the temperature to 70°C for 2 hours, cooling, filtering, washing with ethanol, and drying at 100°C for 2 hours to obtain a surface-modified mesoporous molecular sieve.

[0039] (2) 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 10 parts by weight of acetic acid-vinyl acetate (melt flow index is 35 g / 10min), 4 parts by weight of surface-modified mesoporous molecular sieves, and 2 parts by weight of 2,6-di-tert-butyl-p-cresol are mixed evenly, and then blended and extruded by a twin-screw extruder and granulation to obtain asphalt concrete additive. The operat...

Embodiment 2

[0041] (1) 10 parts by weight of MCM-48 mesoporous molecular sieve (with a specific surface area of ​​800 m 2 / g), 0.6 parts by weight of disodium tetrasulfide were added to 150 parts by weight of xylene. Heating to 55°C, adding 0.8 parts by weight of γ-chloropropyltriethoxysilane dropwise, raising the temperature to 75°C for 2 hours, cooling, filtering, washing with ethanol, and drying at 100°C for 3 hours to obtain a surface-modified mesoporous molecular sieve.

[0042] (2) Copolymerize 100 parts by weight of high-density polyethylene (melt flow index is 8 g / 10 min), 20 parts by weight of polypropylene (melt flow index is 15 g / 10 min), and 15 parts by weight of acetic acid-vinyl acetate (melt flow index is 25 g / 10min), 5 parts by weight of surface-modified mesoporous molecular sieves, and 3 parts by weight of 4,4'-thiobis(6-tert-butyl-3-methylphenol) were mixed evenly, The asphalt concrete additive is obtained by blending, extruding and granulating through a twin-screw extr...

Embodiment 3

[0044] (1) 10 parts by weight of SBA-15 mesoporous molecular sieve (with a specific surface area of ​​1100 m 2 / g), 0.7 parts by weight of disodium tetrasulfide were added to 150 parts by weight of toluene. Heating to 60°C, adding 1.0 parts by weight of chloromethyltriethoxysilane dropwise, raising the temperature to 75°C for 3 hours, cooling, filtering, washing with ethanol, and drying at 100°C for 5 hours to obtain a surface-modified mesoporous molecular sieve.

[0045] (2) Copolymerize 100 parts by weight of high-density polyethylene (melt flow index is 15 g / 10 min), 30 parts by weight of polypropylene (melt flow index is 10 g / 10 min), and 20 parts by weight of acetic acid-vinyl acetate (melt flow index is 15 g / 10min), 6 parts by weight of surface-modified mesoporous molecular sieves, 4 parts by weight of β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate isooctyl ester After uniformity, blending, extrusion and granulation by a twin-screw extruder to obtain the asphalt concr...

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Abstract

The invention discloses an asphalt concrete additive and a preparation method thereof, wherein the asphalt concrete additive comprises the following raw material components by weight: 100 parts of high density polyethylene, 10-30 parts of polypropylene, 10-20 parts of an acetic acid-vinyl acetate copolymer, 2-8 parts of a surface modified mesoporous molecular sieve, and 1-4 parts of an antioxidant, wherein the surface modified mesoporous molecular sieve is a mesoporous molecular sieve modified with chlorosilane and disodium tetrasulfide. According to the present invention, the asphalt concreteadditive has excellent rutting resistance and excellent low temperature performance, has good anti-aging property, and has good compatibility with asphalt.

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-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 additives to the as...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08L23/12C08L23/08C08K9/06C08K9/02C08K3/34B29C47/92B29C48/92
CPCB29C48/92B29C2948/9258B29C2948/92704C08L23/06C08L2201/08C08L2205/03C08L2207/062C08L2207/20C08L23/12C08L23/0853C08K9/06C08K9/02C08K3/34
Inventor 宋乐春陈保莲范思远张静宁爱民李志军程国香
Owner CHINA PETROLEUM & CHEM CORP
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