A kind of high-viscosity and high-elasticity asphalt based on surface modification of rubber particles, SMA asphalt mixture and preparation method thereof

A rubber particle and surface modification technology, which is applied to building insulation materials, building components, buildings, etc., can solve the problems of limited improvement of viscoelastic properties of asphalt, poor storage stability of rubber particles, and influence of pavement material performance, etc., to achieve water resistance Improved stability and fatigue resistance, improved storage stability, and reduced compaction difficulty

Active Publication Date: 2017-10-24
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, research results at home and abroad show that the amount of SBS in asphalt has a limit value (about 8%). After exceeding this amount, the phase inversion of the modified asphalt system will occur, and its performance will be significantly reduced. This factor leads to the impact of SBS on asphalt The viscoelastic performance of the
In addition, rubber powder can significantly improve the elasticity of modified asphalt, but due to the poor storage stability of the rubber particles in the asphalt, special equipment must be used in the construction to "reform and use now", which not only puts forward more stringent requirements for the application process of rubber asphalt requirements, and the segregated rubber asphalt also has a negative impact on the performance of pavement materials
[0004] At present, there are researches using SBS and rubber composite modification technology to further improve the viscoelastic properties of asphalt, but there are obvious technical limitations: first, to ensure that the rubber powder in the composite modified asphalt does not seriously segregation, its dosage can only reach about 5-10%; secondly, due to the use of various modified components, the viscosity of asphalt is significantly increased, and the application of asphalt concrete has the problem of difficulty in ensuring the degree of compaction. Therefore, the current SBS -Rubber powder compound modified asphalt is only mainly used in stress absorbing layer or vibration damping structure

Method used

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  • A kind of high-viscosity and high-elasticity asphalt based on surface modification of rubber particles, SMA asphalt mixture and preparation method thereof
  • A kind of high-viscosity and high-elasticity asphalt based on surface modification of rubber particles, SMA asphalt mixture and preparation method thereof
  • A kind of high-viscosity and high-elasticity asphalt based on surface modification of rubber particles, SMA asphalt mixture and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0028] 1) High-viscosity and high-elasticity asphalt

[0029] A high-viscosity and high-elasticity asphalt based on the surface modification of rubber particles, with base asphalt, activated rubber powder, weather-resistant components, tackifying components (C5 petroleum resin), plasticizing components (dioctyl phthalate) , compatibilization component (minus second-line extraction oil) and cross-linking component (dicumyl peroxide) are prepared as raw materials, and the specific preparation steps are as follows:

[0030] a) Preparation of activated rubber powder: Weigh the raw materials according to the mass ratio of rubber powder (80 mesh bias tire vulcanized rubber powder) and surface activation component to 100:5; first, stir the rubber powder in a stirring pot at 40°C for 120s; Then, divide and add surface activation component three times, the amount that adds for the first time and the second time is 40% of total amount (surface activation component total mass), and stirs...

Embodiment 2

[0048] 1) High-viscosity and high-elasticity asphalt

[0049] A kind of high-viscosity and high-elasticity asphalt based on the surface modification of rubber particles, with base asphalt, activated rubber powder, weather-resistant components, tackifying components (adhesive resin), plasticizing components (dibutyl phthalate) , compatibilizing component (furfural extracted oil) and crosslinking component (sulfur) are prepared as raw materials, and the specific preparation steps are as follows:

[0050] a) Preparation of activated rubber powder: Weigh the raw materials according to the mass ratio of rubber powder (40 mesh or 80 mesh bias tire vulcanized rubber powder) to the surface active component as 100:25; first put the rubber powder in a stirring pot at 50°C Stir for 80s; Then, add the surface active component in three stages, the amount added for the first time is 20% of the total amount (the total mass of the surface active component), stir for 5min, and the amount added...

Embodiment 3

[0067] 1) High-viscosity and high-elasticity asphalt

[0068] A high-viscosity and high-elasticity asphalt based on the surface modification of rubber particles, with base asphalt, activated rubber powder, weather-resistant components, tackifying components (rosin resin), plasticizing components (dibutyl phthalate), The compatibilization component (minus third-line extraction oil) and cross-linking component (sulfur) are prepared as raw materials, and the specific preparation steps are as follows:

[0069] a) Preparation of activated rubber powder: Weigh the raw materials according to the mass ratio of rubber powder (80 mesh bias tire vulcanized rubber powder) and surface active component to 100:30; first, stir the rubber powder in a stirring pot at 55°C for 60 seconds; Then, add surface active component in three stages, the amount that adds for the first time is 10% of total amount (surface active component total mass), stirs 5min, the amount that adds for the second time is ...

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Abstract

The invention discloses a high-viscosity and high-elasticity asphalt-SAM asphalt mixture based on surface modification of rubber particles and a preparation method thereof. The high-viscosity and high-elasticity asphalt uses base asphalt, activated rubber powder, weather-resistant components, tackifying components, plasticizing components, compatibilizing components and crosslinking components as raw materials, and the mass ratio between each component is For: matrix asphalt: activated rubber powder: weather-resistant component: tackifying component: plasticizing component: compatibilizing component: crosslinking component=100:(15~20):(4~6):(2~ 4):(1~3):(1~5):(0.1~1). Applying the high-viscosity and high-elasticity asphalt to the preparation of SMA asphalt mixture can effectively improve the properties of the asphalt mixture such as aging resistance, low temperature performance, high temperature performance and fatigue resistance. The invention overcomes the technical problem of low rubber powder content in the composite modified asphalt and is difficult to apply in asphalt concrete, and is suitable for popularization and use.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a high-viscosity and high-elasticity asphalt-SAM mixture based on surface modification of rubber particles and a preparation method thereof. Background technique [0002] As the country's economy takes off, the scale of the transportation industry is also increasing, and higher requirements are placed on the comprehensive performance (durability, usability and functionality) of road materials. In recent years, research institutions at home and abroad have successively developed a variety of modified asphalt materials to improve the material properties of road asphalt and asphalt mixtures. [0003] Among them, since SBS (styrene-butadiene-styrene block copolymer) and rubber powder have the most obvious effect on improving the viscoelastic properties of asphalt, the current research on asphalt modification technology based on SBS or rubber powder is relativel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L21/00C08L53/02C08L45/00C08L93/04C08L57/02C08K5/12C08K5/01C08K3/06C08K5/14C08J3/12C04B26/26
Inventor 丁庆军赵明宇徐波王发洲苟永刚梁圣全向念谯理格王滔牟廷敏
Owner WUHAN UNIV OF TECH
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