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A kind of composite SBS particle modified asphalt concrete with stable storage and aging resistance and preparation method thereof

A technology of modified asphalt and concrete, applied in building components, building insulation materials, construction and other directions, can solve the problems of increasing the viscosity of the modified asphalt system, the inability of rubber powder to achieve high activation, and increasing the difficulty of construction, and achieve high temperature storage stability. Excellent, excellent aging resistance, low cost effect

Active Publication Date: 2017-12-19
TIANJIN HI TECH ENVIRONMENT DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method prepares particles by blending SBS and rubber powder under high temperature and high shear conditions. This high temperature and high shear will cause SBS to degrade, thereby weakening its modification effect; at the same time, without external activation aids With the aid of the agent, the rubber powder cannot reach a highly activated state only by thermal shearing, and a considerable part of the cross-linked structure is retained. The addition of a large amount of rubber powder particles with this cross-linked structure will increase the viscosity of the modified asphalt system and increase the construction efficiency. difficulty
Moreover, this method is mixed with higher-priced furfural oil, which is not beneficial to the reduction of the cost of modified asphalt

Method used

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  • A kind of composite SBS particle modified asphalt concrete with stable storage and aging resistance and preparation method thereof
  • A kind of composite SBS particle modified asphalt concrete with stable storage and aging resistance and preparation method thereof
  • A kind of composite SBS particle modified asphalt concrete with stable storage and aging resistance and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Pretreat rubber powder, softening oil, and activator in a high-speed mixer at 70°C for 15 minutes according to the weight ratio of 100:5:2, and add them to the first screw extruder by metering, and control the temperature of different sections of the twin-screw at 100-380°C . Among them, the first section: 150-200°C, the second section: 250-300°C; the third section: 300-350°C; the fourth section: 300-350°C; the fifth section: 150-200°C. , The anti-thread element is mixed and pressurized so that the material pressure is about 10Mpa, and the screw speed is controlled at about 100rpm. After shearing and reacting for about 10min, the deeply activated rubber powder is extruded from the die. Subsequently, the deep activated rubber powder is metered into the second screw extruder through the connector, and at the same time adjust the feeding speed of the hopper to add SBS and interfacial phase according to the weight ratio of SBS, deep activated rubber powder and interfacial c...

Embodiment 2

[0041] Pretreat rubber powder, softening oil, and activator in a high-speed mixer at 70°C for 15 minutes according to the weight ratio of 100:10:1, and add them to the first screw extruder, and extrude from the die after shearing and reacting. Activated rubber powder. Subsequently, the deep activated rubber powder is metered into the second screw extruder through the connector, and at the same time adjust the feeding speed of the hopper according to the weight ratio of SBS, deep activated rubber powder, and interfacial compatibilizer by adding SBS and interfacial compatibilizer agent, uniformly mixed, extruded, and water-cooled granulated to prepare storage-stable, aging-resistant composite SBS particles. The process parameters of each step are basically the same as in Example 1. Weigh 10% of storage-stable and aging-resistant composite SBS particles according to the weight ratio of base asphalt, add them to base asphalt and shear for 5 minutes, then stir and add 0.4% stabili...

Embodiment 3

[0043] Pretreat rubber powder, softening oil, and activator in a high-speed mixer at 70°C for 15 minutes according to the weight ratio of 100:15:3, and add them to the first screw extruder, and extrude from the die to a depth of Activated rubber powder. Subsequently, the deeply activated rubber powder is metered into the second screw extruder through the connector, and at the same time adjust the feeding speed of the hopper to add SBS and interface compatibilizer according to the weight ratio of SBS, deep activated rubber powder and interfacial compatibilizer 28:68:4 agent, uniformly mixed, extruded, and water-cooled granulated to prepare storage-stable, aging-resistant composite SBS particles. The process parameters of each step are basically the same as in Example 1. Weigh 12% storage-stable and aging-resistant composite SBS particles according to the weight ratio of the base asphalt, add them to the base asphalt and shear for 5 minutes, then add 0.4% stabilizer with stirri...

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Abstract

A storage-stable, aging-resistant composite SBS particle-modified asphalt concrete and a preparation method thereof of the present invention, the composite SBS particle includes SBS15%-38%, deeply activated rubber powder 56%-82%, and interface compatibilizer 3%- 6%, wherein the deep activated rubber powder is made up of rubber powder, softening oil and activator. The method utilizes high temperature and high shear of a twin-screw extruder to act on waste rubber powder to obtain deeply activated rubber powder. The composite SBS particle is prepared by fully mixing the SBS particle / deeply activated rubber powder by the blending action of the screw and granulating, and the modified asphalt concrete is prepared through the composite SBS particle. Compared with ordinary SBS modifiers, the composite SBS particle modified asphalt concrete of the present invention has excellent aging resistance and basically no precipitation during heat storage. It can consume a large amount of waste tires and reduce "black pollution". It can reduce urban noise pollution, the microstructure of the road surface is conducive to road drainage, reduce water splashing, and improve driving safety performance.

Description

technical field [0001] The invention relates to a building material used in the engineering field, in particular to a stable-storage, aging-resistant composite SBS particle-modified asphalt concrete and a preparation method thereof. Background technique [0002] At present, adding polymers to improve the performance of matrix asphalt and then obtain modified asphalt concrete has been widely recognized in the industry. Styrene butadiene block copolymer (SBS) is a mature polymer-modified asphalt modifier, and its dosage accounts for more than half of the total modifier. The thermoplastic elastomer SBS has the characteristics of two phases of rubber and plastic, and the modified asphalt prepared by it has good high and low temperature performance, and has good deformation recovery ability, and is an excellent modifier. However, its high price and high cost of modified asphalt materials limit the wide application of SBS. Therefore, people are looking for a more economical and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B26/26C08L95/00C08L53/02C08L21/00
Inventor 董大伟江宽陈俊峰马庆杰刘双旺
Owner TIANJIN HI TECH ENVIRONMENT DEV CO LTD
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