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A kind of asphalt concrete additive and preparation method thereof

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

Active Publication Date: 2021-03-05
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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  • A kind of asphalt concrete additive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) 10 parts by weight of MCM-41 mesoporous molecular sieve (specific surface area is 1000 m) 2 / G), 0.4 parts by weight of sodium sodium sodium sodium sodium sulfide is added to 100 parts by weight of toluene. When heated to 50 ° C, 0.5 parts by weight of γ-chloropropyltrimethoxysilane was added dropwise, and the temperature was tapered to 70 ° C for 2 h, and then filtered, washed with ethanol, 100 ° C for 2 h, resulting in surface modified mesh molecular sieve.

[0039] (2) 100 parts by weight of high-density polyethylene (melt flow index of 2 g / 10 min), 10 parts by weight of polypropylene (melt flow index of 10 g / 10 min), 10 parts by weight of acetic acid-vinyl acetate copolymer (Melt fluid index is 35 g / 10min), 4 parts by weight of surface modified mesoporous molecular sieve, 2 parts by weight of 2,6-di-tert-butyl phenol is mixed, and the twin screw extruder is blended , Granulated, resulting in asphalt concrete additives. The extruder operating conditions were: a...

Embodiment 2

[0041] (1) 10 parts by weight of MCM-48 mesoporous molecular sieve (specific surface area is 800 m) 2 / g), 0.6 parts by weight of quadranium sodium sodium sodium sodium is added to 150 parts by weight of xylene. It was heated to 55 ° C, 0.8 parts by weight of γ-chloropropyltriethoxysilane, warmed to 75 ° C for 2 h, and then filtered, washed with ethanol, 100 ° C for 3 h, resulting in surface modified mesoporous molecular sieve.

[0042] (2) 100 parts by weight of high-density polyethylene (melt flow index of 8 g / 10 min), 20 parts by weight of polypropylene (melt flow index of 15 g / 10 min), 15 parts by weight of acetic acid-vinyl acetate copolymer (Melt Flow Index is 25 g / 10min), 5 parts by weight of surface modified mesoporous molecular sieve, 3 parts by weight of 4,4'-thiocyanis (6-tert-butyl-3-methylphenol) mixed, The blended extrusion is blended with a twin screw extruder to obtain asphalt concrete additives. The extruder operating conditions were: a period of 140 ° C; tw...

Embodiment 3

[0044] (1) 10 parts by weight of SBA-15 mesoporous molecular sieve (specific surface area is 1100 m) 2 / G), 0.7 parts by weight of sodium sodium sodium sulfide is added to 150 parts by weight of toluene. Heat until 60 ° C, 1.0 parts by weight of chloromethyl triethoxysilane, and the temperature was raised to 75 ° C for 3 h, and then filtered, washed with ethanol, 100 ° C for 5 h, resulting in surface modified mesoporous molecular sieve.

[0045] (2) 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), 20 parts by weight of acetic acid-vinyl acetate copolymer (Melt fluid index is 15 g / 10min), 6 parts by weight of surface modified mesh molecular sieve, 4 parts by weight of β- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate isooctanol mixture After uniform, the blended extrusion is blended with a twin screw extruder to obtain asphalt concrete additives. The extruder operating cond...

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Abstract

The invention discloses an asphalt concrete additive and a preparation method thereof. The asphalt concrete additive includes the following raw material components in parts by weight: 100 parts of high-density polyethylene, 10-30 parts of polypropylene, 10-20 parts of acetic acid-vinyl acetate copolymer, 2-8 parts of surface-modified mesoporous molecular sieves, 1-4 parts of oxygen agent; wherein, the surface-modified mesoporous molecular sieve is a mesoporous molecular sieve modified by chlorosilane and disodium tetrasulfide. The asphalt concrete additive of the invention has very excellent anti-rutting performance and low-temperature performance, and at the same time has good anti-aging performance, and the additive has very good compatibility with asphalt.

Description

Technical field [0001] The present invention relates to an asphalt concrete additive and a preparation method thereof, in particular to a high modulus asphalt concrete additive having anti-aging properties and a preparation method thereof. Background technique [0002] With the increasing increase in high-level road traffic flow, and the increasing transport of transport vehicles and the channel of traffic flow, the ruts become the main form of road damage, which seriously affects the comfort and road service life of the road driving. Research and application of high performance modified asphalt have become an urgent requirement for current road construction. [0003] At present, by increasing the method of increasing the amount of asphalt mixture, it is an effective means. The technology used by this technology mainly uses high viscosity of hard asphalt tapers, and several methods such as blending natural asphalt or polyolefin additives to asphalt mix. Since the polyolefin addit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/06C08L23/12C08L23/08C08K9/06C08K9/02C08K3/34B29C48/92
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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