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Particle additive suitable for bituminous pavement and preparation and using methods thereof

A granular additive, asphalt pavement technology, applied in building components, building insulation materials, construction and other directions, can solve the problems of complex process, unsuitable for large-scale application, etc., and achieve simple process, good economic and social benefits, and stable storage. Effect

Inactive Publication Date: 2011-06-08
北京新桥技术发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process is complex and not suitable for large-scale application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] According to the mass parts, mix 10 parts of 40 mesh rubber powder, 5 parts of wax and 80 parts of polyethylene into the rubber mixer, melt, shear and mix at 160-190℃ to make a homogeneous substance , And then extruded through a nozzle to make extrudates, after cooling and shaping, the extrudates are pelletized on a pelletizer, and then air-dried to obtain pellet additives.

[0021] The granular additive is hot-mixed with stone material and asphalt at a temperature of 170-195°C at a mass ratio of 3‰ to obtain an asphalt mixture.

[0022] The road performance of asphalt mixture is as follows: bending test failure strain (-10℃, 50mm / min) 4478με, freeze-thaw splitting test residual splitting strength ratio TSR of 91%, rutting test dynamic stability (60℃, 0.7 MPa) is 4987 times / mm.

Embodiment 2

[0024] According to the mass parts, mix 20 parts of 60 mesh rubber powder, 5 parts of wax, 60 parts of waste polyethylene and 20 parts of waste polypropylene into the rubber mixer, and melt, shear and mix at 160-190℃. It is processed to make a uniform substance, and then extruded through a nozzle to make an extrudate. After cooling and shaping, the extrudate is pelletized on a pelletizer, and then air-dried to obtain a pellet additive.

[0025] The granular additive is hot-mixed with stone material and asphalt at a temperature of 170-195°C at a mass ratio of 5‰ to obtain an asphalt mixture.

[0026] The road performance of asphalt mixture is as follows: bending test failure strain (-10℃, 50mm / min) 3281με, freeze-thaw splitting test residual splitting strength ratio TSR of 85.4%, rutting test dynamic stability (60℃, 0.7MPa ) Is 6598 times / mm.

Embodiment 3

[0028] According to the mass parts, mix 10 parts of 80 mesh rubber powder, 5 parts of wax, 50 parts of polyethylene and 15 parts of styrene-butadiene rubber into the rubber mixer, and then melt, shear and mix at 160-190℃. , Made into a uniform substance, and then extruded through a nozzle to make extrudates, after cooling and shaping, the extrudates are granulated on a granulator, and then air-dried to obtain granular additives.

[0029] The granular additive is hot-mixed with stone material and asphalt at a temperature of 170-195°C at a mass ratio of 5‰ to obtain an asphalt mixture.

[0030] The road performance of asphalt mixture is as follows: bending test failure strain (-10℃, 50mm / min) 5713με, freeze-thaw splitting test residual splitting strength ratio TSR of 76%, rutting test dynamic stability (60℃, 0.7MPa ) Is 5029 times / mm.

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Abstract

The invention relates to a particle additive suitable for a bituminous pavement and preparation and using methods thereof. The particle additive is mainly prepared from 40-80 parts of high polymers, 5-30 parts of rubber powder and 5-10 parts of wax; and the preparation method comprises the following steps of: uniformly stirring the components, then carrying out mixing, extruded granulation and air drying on mixtures by using a rubber refining machine to obtain the rubber-powder particle additive. The particle additive is directly added when mixed and stirred without special equipment so that the preparation method is simple in process and convenient to operate; the particle additive can comprehensively raise and improve the quality of bituminous mixtures and has excellent low-temperature crack resistance, water stability and high-temperature track resistance as well as favorable economic and social benefits so that the integral durability of bituminous concrete is improved.

Description

Technical field [0001] The invention relates to a particle additive suitable for asphalt pavement and a preparation and use method thereof. Background technique [0002] With the rapid development of my country's road transportation industry, the large-scale vehicles, heavy loads and overloads are becoming more and more serious. Many pavements appear diseases soon after they are completed, and serious ones even require major repairs in advance. This also shows that ordinary asphalt concrete pavements cannot meet the requirements of modern road transportation for high-temperature stability, low-temperature crack resistance, aging resistance and durability. For this reason, while improving the asphalt surface structure, highway builders also used admixtures to modify the performance of asphalt and mixtures. It is precisely because of the dual need to find cheap alternatives to traditional polymer modifiers and to dispose of waste tires, people have tried to use rubber powder produ...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08L23/12C08L9/06C08L13/00C08L7/00C08L51/06C08L23/08C08L31/04C08L21/00C08L95/00
Inventor 黄小溪胡茂龙彭志强
Owner 北京新桥技术发展有限公司
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