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High-elasticity asphalt modified composition, modifier, modified asphalt, modified asphalt mixture and preparation method

A kind of asphalt modifier and asphalt modification technology, which is applied in the direction of building structure, building insulation materials, building components, etc., can solve the problem of low shear strength, fatigue deformation of mixture, high viscosity modified SMA construction difficulties, and affect asphalt bonding It can reduce the mixing and compaction temperature, improve high temperature stability and elastic recovery ability, and achieve good high and low temperature stability.

Active Publication Date: 2015-05-20
SHANGHAI MUNICIPAL ENG DESIGN INST GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the low shear strength of the existing ordinary modified asphalt SMA, which is difficult to meet the requirements of the steel bridge deck pavement on the fatigue deformation of the mixture, and the existing high-viscosity modified SMA. In view of defects in the quality of binder or mixture, a highly elastic asphalt modified composition, modifier, modified asphalt, modified asphalt mixture and preparation method are provided

Method used

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  • High-elasticity asphalt modified composition, modifier, modified asphalt, modified asphalt mixture and preparation method

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Embodiment 1

[0048] A high-elastic asphalt modified composition, comprising the following components: 100 parts of styrene-butadiene-styrene block copolymer, 20 parts of tackifier, 40 parts of softening agent, 6 parts of warm mixing agent, 30 parts of plasticizer and 4 parts of stabilizer; Among them, the tackifier is mixed with rubber powder and petroleum resin with a particle size of 60 mesh in a mass ratio of 60:40, the softening agent is furfural extracted oil, and the warm mixing agent is polyethylene wax. The plasticizer is dioctyl phthalate, and the stabilizer is sulfur.

[0049] A preparation method of high elastic asphalt modifier, comprising the steps of:

[0050] (1) According to the formula, the styrene-butadiene-styrene block copolymer, tackifier and warm mixing agent were stirred and mixed at a high speed at 180°C to obtain a melt;

[0051] (2) Add softener, plasticizer and stabilizer to the melt, stir at a high speed at 300 rpm until the mixture is uniform, and then extrude...

Embodiment 2

[0055] A high elastic asphalt modified composition, comprising the following components: 100 parts of styrene-butadiene-styrene block copolymer, 40 parts of tackifier, 20 parts of softening agent, 8 parts of warm mixing agent, 15 parts of plasticizer and 6 parts of stabilizer; Among them, the tackifier is formed by mixing rubber powder and petroleum resin with a particle size of 40 mesh in a mass ratio of 40:60, the softening agent is furfural extracted oil, and the warm mixing agent is polyethylene wax. The plasticizer is diethyl phthalate, and the stabilizer is sulfur.

[0056] A preparation method of high elastic asphalt modifier, comprising the steps of:

[0057] (1) According to the formula, the styrene-butadiene-styrene block copolymer, tackifier and warm mixing agent were stirred and mixed at a high speed at 180°C to obtain a melt;

[0058] (2) Add softener, plasticizer and stabilizer to the melt, stir at a high speed at 300 rpm until the mixture is uniform, and then e...

Embodiment 3

[0062] A high elastic asphalt modified composition, comprising the following components: 100 parts of styrene-butadiene-styrene block copolymer, 30 parts of tackifier, 30 parts of softening agent, 8 parts of warm mixing agent, 15 parts of plasticizer and 4 parts of stabilizer; Among them, the tackifier is mixed with rubber powder and petroleum resin with a particle size of 60 mesh in a mass ratio of 60:40, the softener is furfural extracted oil, and the warm mixing agent is polyethylene wax. The plasticizer is diethyl phthalate, and the stabilizer is sulfur.

[0063] A preparation method of high elastic asphalt modifier, comprising the steps of:

[0064] (1) According to the formula, the styrene-butadiene-styrene block copolymer, tackifier and warm mixing agent were stirred and mixed at a high speed at 180°C to obtain a melt;

[0065] (2) Add softener, plasticizer and stabilizer to the melt, stir at a high speed at 300 rpm until the mixture is uniform, then extrude through a ...

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Abstract

The invention relates to a high-elasticity asphalt modified composition, a modifier, modified asphalt, a modified asphalt mixture and a preparation method. The modified composition comprises 100 parts of a styrene-butadiene-styrene segmented copolymer, 20-40 parts of a tackifier, 20-40 parts of a softener, 3-8 parts of a warm mixing agent, 15-40 parts of a plasticizer and 2-6 parts of a stabilizer. The preparation method of the modifier comprises the following steps: (1) mixing the styrene-butadiene-styrene segmented copolymer, the tackifier and the warm mixing agent according to a formula to obtain a melt; and (2) mixing the softener, the plasticizer and the stabilizer with the melt, and then extruding, cooling and dicing. The modified asphalt is prepared by doping the modifier into matrix asphalt and uniformly mixing. The modified asphalt mixture is prepared by mixing the modified asphalt and a raw material of a mineral mixture. The modified asphalt provided by the invention has good high-temperature and low-temperature stabilities and anti-fatigue capacity, and the modified asphalt mixture is strong in construction workability and good in pavement performance.

Description

technical field [0001] The invention relates to the technical field of asphalt, in particular to a highly elastic asphalt modified composition, a modifier, modified asphalt, a modified asphalt mixture and a preparation method. Background technique [0002] Steel box girders are widely used due to their unique advantages such as large span, light weight and convenient construction. Compared with ordinary road pavement and cement concrete bridge deck pavement, steel box girder bridge deck pavement has more severe service conditions, so the requirements for performance are higher: first, the pavement layer should have good road performance, high, Low temperature stability, water stability and water resistance, etc.; secondly, due to the good heat transfer of steel plates, deformation and shear force are prone to occur during construction at high temperatures, which requires that the pavement layer should have good flexibility and deformation following ability . [0003] At pr...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L53/02C08L21/00C08L57/02C08L45/02C08L23/06C08K5/01C08K5/12C08K3/06C04B26/26
Inventor 郑晓光麻旭荣马骉
Owner SHANGHAI MUNICIPAL ENG DESIGN INST GRP
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