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Compound modifier for widening using temperature range of bituminous mixture and preparation method thereof

A compound modifier and asphalt mixture technology, which is applied in building insulation materials, building components, buildings, etc., can solve the problems of asphalt pavement cracks, rutting, wave movement, affecting the durability and service life of the pavement, and achieve consumption saving , good environmental protection, and the effect of widening the operating temperature range

Inactive Publication Date: 2016-12-07
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because asphalt pavement uses asphalt material as a binder, and asphalt is a temperature-sensitive viscoelastic material, when the ambient temperature rises, the asphalt pavement will produce rutting, wave movement and other diseases under the action of vehicle load; when the ambient temperature decreases When the asphalt pavement is cracked, it will affect the durability and service life of the pavement.

Method used

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  • Compound modifier for widening using temperature range of bituminous mixture and preparation method thereof
  • Compound modifier for widening using temperature range of bituminous mixture and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Preparation of activated rubber powder: Mix 30Kg of dried waste rubber powder (dried in a constant temperature drying oven at 60°C, the drying time is not less than 6 hours, and the particle size is 40 mesh) with 15Kg of 5# diesel oil. Seal and place for 72 hours to obtain activated rubber powder.

[0018] Preparation of grafted modified eucommia gum: Add 2Kg eucommia gum to an internal mixer, masticate at 110°C for 10 minutes at a speed of 100rad / min, then add the masticated eucommia gum to 10Kg xylene, and heat up to 70 Stir at ℃ at the same time to fully dissolve Eucommia gum in xylene, then add 300g of maleic anhydride monomer and 30g of dibenzoyl peroxide, continue to stir and react for 4h. and placed in a vacuum oven at 60°C to dry to constant weight to obtain grafted modified Eucommia gum.

[0019] Prepare a compound modifier for widening the temperature range of asphalt mixture: 68Kg PE regenerated granules, 30Kg activated rubber powder, and 2Kg grafted modifie...

Embodiment 2

[0021] Preparation of activated rubber powder: Mix 35Kg of dried waste rubber powder (dried in a constant temperature drying oven at 60°C, the drying time is not less than 6 hours, and the particle size is 40 mesh) with 17.5Kg of 97# gasoline. The lower seal was placed for 72 hours to obtain activated rubber powder.

[0022] Preparation of grafted modified eucommia gum: Add 2Kg eucommia gum to an internal mixer, masticate at 110°C for 10 minutes at a speed of 100rad / min, then add the masticated eucommia gum to 10Kg xylene, and heat up to 80 Stir at the same time at ℃ to fully dissolve Eucommia gum in xylene, then add 200g of maleic anhydride monomer and 20g of dibenzoyl peroxide, continue to stir and react for 4h. and placed in a vacuum oven at 60°C to dry to constant weight to obtain grafted modified Eucommia gum.

[0023] Prepare a compound modifier for widening the temperature range of asphalt mixture: 63Kg PE regenerated granules, 35Kg activated rubber powder, and 2Kg gra...

Embodiment 3

[0025] Preparation of activated rubber powder: Mix 40Kg of dried waste rubber powder (dried in a constant temperature drying oven at 60°C, the drying time is not less than 6 hours, and the particle size is 40 mesh) with 20Kg of 97# gasoline, and after mixing evenly, put it at room temperature Seal and place for 48 hours to obtain activated rubber powder.

[0026] Preparation of grafted modified eucommia gum: Add 3Kg eucommia gum to an internal mixer, masticate at 110°C for 10 minutes at a speed of 100rad / min, then add the masticated eucommia gum to 15Kg xylene, and heat up to 70 Stir at the same time at ℃ to make Eucommia gum fully dissolve in xylene, then add 300g maleic anhydride monomer and 30g dicumyl peroxide, continue to stir and react for 5h, use acetone to precipitate and separate the product after the reaction, and then wash with distilled water for 3 and placed in a vacuum oven at 60°C to dry to constant weight to obtain grafted modified Eucommia gum.

[0027] Prepa...

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Abstract

The invention relates to a compound modifier for widening the using temperature range of a bituminous mixture and a preparation method thereof. The compound modifier is prepared from, by weight, 45-70% of PE regenerated particles, 25-50% of active rubber powder and 2-5% of graft-modified eucommia ulmoides gum. The preparation method of the compound modifier includes the steps that the PE regenerated particles, the active rubber powder and the graft-modified eucommia ulmoides gum are mixed to be uniform in a mixer in proportion, the mixture is added into a single-screw extruder, melt extrusion is carried out at the temperature of 240-300 DEG C and the screw rotating speed of 30-100 rpm, water-cooling wiredrawing, sized dicing and drying are carried out, and the compound modifier is obtained. By means of the compound modifier, the high-temperature anti-track performance and low-temperature anti-cracking performance of the bituminous mixture can be remarkably improved, in other words, the using temperature range of the bituminous mixture is widened.

Description

technical field [0001] The invention relates to a compound modifier for widening the use temperature range of asphalt mixture and a preparation method thereof. Background technique [0002] About 75% of the highways built in our country use asphalt pavement. Since asphalt pavement uses asphalt material as a binder, and asphalt is a temperature-sensitive viscoelastic material, when the ambient temperature rises, the asphalt pavement will produce rutting, wave movement and other diseases under the action of vehicle load; when the ambient temperature decreases When the asphalt pavement cracks, the durability and service life of the pavement will be affected. With the characteristics of large flow, large axle load and channelized traffic on expressways in my country becoming more and more prominent, how to improve the high-temperature anti-rutting performance and low-temperature anti-cracking performance of asphalt pavement has become an urgent problem in road construction. ...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L23/06C08L19/00C08L51/04C08F253/00C08F222/06
CPCC08F253/00C08L19/003C08L23/06C08L95/00C08L2201/08C08L2205/03C08L2205/035C08L2312/00C08L51/04C08F222/06
Inventor 李相国任钊锋韩延昭刘卓霖尹轮蒋文广胡赞
Owner WUHAN UNIV OF TECH
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