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High-content and high-elasticity special modifier for asphalt, and preparation method thereof

A high-elasticity and modifier technology, applied in the field of asphalt modifiers, can solve the problems that the performance cannot meet the standard of high-elasticity asphalt, cannot continue processing, and has poor compatibility with asphalt, and achieves good economy and use value, and is easy to popularize. Prospect, effect of improving anti-aging properties

Active Publication Date: 2017-05-24
SHANGHAI RES INST OF CHEM IND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, currently domestic common SBS modified materials are used in the process of producing high-volume modified asphalt. When the content of SBS modifier is high, the compatibility with asphalt is poor, the processing time is long, and even high-temperature viscosity is too high. As a result, there are serious problems that cannot continue to be processed. Very few modified asphalts that can be processed have extremely poor storage stability, and the performance cannot meet the standards of high-elastic asphalt.

Method used

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  • High-content and high-elasticity special modifier for asphalt, and preparation method thereof
  • High-content and high-elasticity special modifier for asphalt, and preparation method thereof
  • High-content and high-elasticity special modifier for asphalt, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1) Add 65 parts of main body modifier, 15 parts of viscosity regulator, 10 parts of anti-aging agent and 10 parts of stabilizer to the pulverizer in turn at -10°C, and then sieve with a 60-mesh sieve to obtain high dosage, high Special modifier for elastic asphalt.

[0029] 2) The main body modifier contains: 68 parts of styrene-butadiene block copolymer, 9 parts of polystyrene-butadiene copolymer, 11 parts of ethylene-vinyl acetate copolymer and 12 parts of styrene-isoamyl Diene block copolymers.

[0030] Wherein the styrene-butadiene block copolymer contains: 20 parts of styrene-butadiene block copolymer modified by sulfonic acid groups, 23 parts of styrene-butadiene graft modified by methacrylic acid Block copolymer, 31 parts of cysteine-terminated modified styrene-butadiene block copolymer, 11 parts of sulfonic acid group-terminated modified styrene-butadiene block copolymer, 15 parts Amide-terminated modified styrene-butadiene block copolymer, the graft modified ...

Embodiment 2

[0035] 1) Add 75 parts of main body modifier, 8 parts of viscosity modifier, 6 parts of anti-aging agent and 11 parts of stabilizer to the pulverizer in sequence at -10°C, and then sieve with a 60-mesh sieve to obtain high dosage, high Special modifier for elastic asphalt.

[0036] 2) The host modifier contains: 68 parts of styrene-butadiene block copolymer, 11 parts of polystyrene-butadiene copolymer, 6 parts of ethylene-vinyl acetate copolymer and 11 parts of styrene-isoamyl Diene block copolymers.

[0037] Among them, the styrene-butadiene block copolymer contains: 16 parts of styrene-butadiene block copolymer modified by hydroxyl group grafting, 28 parts of styrene-butadiene block copolymer modified by carboxyl group 19 parts of maleic anhydride graft modified styrene-butadiene block copolymer, 11 parts of carboxyl-terminated modified styrene-butadiene block copolymer, 15 parts of acrylic acid-terminated modified Styrene-butadiene block copolymer, 11 parts of ester group...

Embodiment 3

[0042] 1) Add 90 parts of main body modifier, 6 parts of viscosity regulator, 2 parts of anti-aging agent and 2 parts of stabilizer to the pulverizer in sequence at -10°C, and then sieve with a 60-mesh sieve to obtain high dosage, high Special modifier for elastic asphalt.

[0043] 2) The main body modifier contains: 68 parts of styrene-butadiene block copolymer, 9 parts of polystyrene-butadiene copolymer, 11 parts of ethylene-vinyl acetate copolymer and 12 parts of styrene-isoamyl Diene block copolymers.

[0044] Wherein the styrene-butadiene block copolymer contains: 7 parts of acrylic acid graft modified styrene-butadiene block copolymer, 9 parts of hydroxyl graft modified styrene-butadiene block copolymer , 28 parts of carboxyl-modified styrene-butadiene block copolymers, 19 parts of maleic anhydride graft-modified styrene-butadiene block copolymers, 11 parts of carboxyl-terminated modified benzene Ethylene-butadiene block copolymer, 15 parts of acrylic acid-terminated m...

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Abstract

The invention belongs to the technical field of asphalt modifiers, and relates to a high-content and high-elasticity special modifier for asphalt, and a preparation method thereof. The modifier comprises, by weight, 65-90 parts of a main body modifier, 0.1-36 parts of a viscosity regulator, 0.5-30 parts of an antioxidant and 0.2-37 parts of a stabilizer. The preparation method comprises the following steps: crushing the main body modifier, the viscosity regulator, the antioxidant and the stabilizer at -10-5 DEG C by a crusher, and screening the crushed materials by a 60-150 mesh sieve to obtain the high-content and high-elasticity special modifier for asphalt. Compared with modifiers in the prior art, the special modifier substantially improves the high temperature stability, the low temperature crack resistance, the ageing resistance and the elasticity recovery performance of asphalt, and solves the problems of difficulty processing and long processing time of present styrene-butadiene-styrene block copolymer modifiers at high content.

Description

technical field [0001] The invention relates to the technical field of asphalt modifiers, in particular to a special modifier for high-volume, high-elasticity asphalt and the material ratio and preparation method of the modified asphalt composition. Background technique [0002] In recent years, with the rapid development of my country's society, economy and highway construction, the construction of long-span bridges, especially large bridges across rivers and seas, has developed rapidly. Among long-span bridges, steel bridges are widely used. However, due to the large bending and local deformation characteristics of the steel bridge, the pavement of the steel bridge deck is easily damaged. Therefore, the modified asphalt used for the pavement of the steel bridge deck is required to have the characteristics of large bending at low temperature, deformation followability and Crack resistance characteristics. [0003] As a road paving material, asphalt has certain waterproof ...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L53/02C08L51/00C08L25/10C08L23/08C08L23/06C08L93/04C08L45/00C08L1/28C08K13/02C08K3/22C08K5/13C08K5/098
Inventor 卞嘉祺杨维成罗勇柴冲冲段敏伟乔拟春曹亚东林家祥王静李雪坤陈国顺
Owner SHANGHAI RES INST OF CHEM IND
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