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High-modulus bituminous mixture additive and preparation method thereof

An asphalt mixture and additive technology, which is applied in building thermal insulation materials, building components, buildings, etc., can solve the problems of high construction temperature and poor low temperature performance, improve rutting resistance, reduce mixing and compaction temperature, and improve processing. simple craftsmanship

Active Publication Date: 2014-05-07
SHANGHAI MUNICIPAL ENG DESIGN INST GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a high modulus asphalt mixture additive and its preparation method, to solve the problems of high construction temperature and poor low temperature performance existing in the existing high modulus asphalt modifier, and improve the resistance of the asphalt pavement at the same time. Rutting performance and shear resistance

Method used

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  • High-modulus bituminous mixture additive and preparation method thereof

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preparation example Construction

[0028] The preparation method of this high modulus asphalt mixture additive, carries out according to the following steps:

[0029] 1) Weigh the modified main agent, styrene-butadiene rubber, and polyethylene paraffin in proportion, heat up while stirring under the condition of 30-90r / m, and rapidly raise the temperature to 160-190°C to completely melt until the mixture is uniform;

[0030] 2) Add fillers, anti-aging components and plasticizing components to the melt, and stir at 150-300r / m for 15-30 minutes at 160-190°C to make the mixture evenly mixed;

[0031] 3) The mixture passes through the screw extruder to extrude the cylindrical semi-finished product, and then cools at room temperature, and the cooled semi-finished product is sent to the cutting machine for cutting, and the uniform granular finished product can be obtained.

Embodiment 1

[0033] A high-modulus asphalt mixture additive, which is composed of modified main agent, styrene-butadiene rubber, polyethylene paraffin, filler, anti-aging component, plasticizing component, etc. The mass percentage of each raw material is: modified main agent: Styrene butadiene rubber: polyethylene paraffin: filler: anti-aging component: plasticizing component = 100:15:20:50:5:12.

[0034] The modified main agent is a mixture of waste PE and polypropylene, and the mixing ratio is 80:20. The filler is diatomite, the anti-aging component is activated rubber powder, and the plasticizing component is dioctyl phthalate.

[0035] The preparation method of the above-mentioned high-modulus asphalt mixture additive is as follows: firstly, the modified main agent, styrene-butadiene rubber, and polyethylene paraffin are stirred at a low speed at 160-190°C, and mixed uniformly to form a melt; The aging component and the plasticizing component are added to the melt, the temperature is ...

Embodiment 2

[0037] A high-modulus asphalt mixture additive, which is composed of modified main agent, styrene-butadiene rubber, polyethylene paraffin, filler, anti-aging component, plasticizing component, etc. The mass percentage of each raw material is: modified main agent: Styrene butadiene rubber: polyethylene paraffin: filler: anti-aging component: plasticizing component = 100:20:25:55:4:12.

[0038] The modified main agent is a mixture of waste PE and polypropylene, and the mixing ratio is 75:25. The filler is organic bentonite, the anti-aging component is activated rubber powder, and the plasticizing component is dioctyl phthalate.

[0039] The preparation method of the high modulus asphalt mixture additive is the same as in Example 1.

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Abstract

The invention discloses a high-modulus bituminous mixture additive and a preparation method thereof. The high-modulus bituminous mixture additive is composed of a modifying main agent, butadiene styrene rubber, polyethylene paraffin, a filling material, an anti-aging component, and a plasticizing component according to a mass percentage of 100:(10-30):(15-40):(40-80):(2-6):(5-20); wherein the modifying main agent consists of one or more components selected from waste PE, polypropylene, and EVA. The preparation method comprises the following steps: evenly mixing the modifying main agent, butadiene styrene rubber and polyethylene paraffin at a temperature of 160 to 190 DEG C, adding the filling material, anti-aging component and plasticizing component into the mixture, evenly mixing under a certain rotation speed, then extruding the mixture by a screw extruder, cooling at the room temperature, and finally cutting into particles. The high-modulus bituminous mixture additive is mainly applied to pavement projects such as new construction and reconstruction of high grade roads and heavy traffic roads, can improve the dynamic stability, static modulus, dynamic modulus and shearing resistant performance of bituminous mixture, thus prominently reduces the damages of rut, displacement, or the like, and can improve the low-temperature anti-cracking performance of high-modulus bituminous mixture at the same time.

Description

technical field [0001] The invention relates to a high-modulus asphalt mixture additive and a preparation method thereof, which are mainly used for improving the dynamic stability, modulus and shear strength of the asphalt mixture, so as to significantly reduce the rutting, moving and other diseases of the asphalt pavement. Background technique [0002] Up to now, rutting, passing and other diseases are the main disease forms that plague the asphalt pavement of my country's high-grade highways, especially in hot summer areas, overweight traffic, long longitudinal slopes and other road sections. [0003] The rutting of asphalt pavement in my country is mainly caused by the permanent deformation of the asphalt pavement. This permanent deformation is composed of two parts, one part is caused by the further compaction of the asphalt surface layer under the repeated action of traffic load, which can be called compaction deformation; the other part is because the strength of the a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L23/06C08L23/12C08L23/08C08L31/04C08L9/06C08K13/02C08K3/34C08K3/04C08K5/12
Inventor 麻旭荣郑晓光乔英娟白彦峰何昌轩
Owner SHANGHAI MUNICIPAL ENG DESIGN INST GRP
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