Storage-stable and ageing-resistant composite SBS particle modified asphalt concrete 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 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: 2015-06-17
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 consi

Method used

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  • Storage-stable and ageing-resistant composite SBS particle modified asphalt concrete and preparation method thereof
  • Storage-stable and ageing-resistant composite SBS particle modified asphalt concrete and preparation method thereof
  • Storage-stable and ageing-resistant composite SBS particle modified asphalt concrete 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

The invention discloses a storage-stable and ageing-resistant composite SBS particle modified asphalt concrete and a preparation method thereof. The composite SBS particles comprise 15%-38% of SBS, 56%-82% of deep activation rubber powder, and 3%-6% of an interface compatibilizer, wherein the deep activation rubber powder consists of rubber powder, softening oil and an activating agent. According to the storage-stable and ageing-resistant composite SBS particle modified asphalt concrete and the preparation method thereof, waste rubber power is processed through a double-screw extruder under the high-temperature and high shearing condition to obtain the deep activation rubber powder; and besides, the blending effect of screw rods is utilized to fully mix SBS particles with the deep activation rubber powder to prepare the composite SBS particles through granulation, and the composite SBS particles are utilized to prepare modified asphalt concrete; Compared with a common SBS modifying agent, the composite SBS particle modified asphalt concrete is better in ageing resistance, and has no heat storage evolution; junked tires can be excessively consumed, the black pollution is reduced, city noise pollution is reduced, and the surface drainage is facilitated, water splattering is alleviated, and the traffic safety performance is improved through the pavement surface microscopic structure.

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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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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