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Low-temperature environment-friendly rubber asphalt and preparation method thereof

A technology of environmentally friendly rubber and rubber asphalt, which is applied in building insulation materials, building components, construction, etc., can solve the problems of high processing temperature of modified asphalt, reduced high temperature performance damage, and easy agglomeration of desulfurized rubber powder, so as to achieve easy swelling and Effects of response, volume reduction, and increase in apparent density

Active Publication Date: 2012-06-27
沈阳三鑫集团有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this invention proposes a desulfurized rubber powder stabilization system, the processing temperature of modified asphalt is high, and the high temperature performance is damaged and reduced, and the desulfurized rubber powder is easy to agglomerate and difficult to add
[0007] Patent 200510016292.9 "Production Equipment for Waste Tire Rubber Powder Modified Asphalt" and Patent 200610047442.7 "A Preparation Method for Rubber Powder Modified Asphalt Suitable for Industrial Production" both proposed multi-stage high-temperature shear mills to improve the rubber powder Mixing and dispersion effect, but there are problems such as energy consumption and pollution in the high temperature shearing process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Weigh 30 parts by weight of waste rubber products processed and ground fine powder as rubber powder, the mesh number is 10 mesh, 10 phr of the weight of the rubber powder Softener—machine oil, 0.07 phr of the weight of the rubber powder Activator—waste machine oil and the mixture of alkylphenol disulfide, the weight ratio of the two is 2, and 13phr of the adhesive granulating agent polyethylene accounting for the weight of the rubber powder is put into a high-speed mixer for mixing, the mixing temperature is 80 ° C, and the rotating speed is 1000 rpm to obtain the mixture; The mixture is extruded with an extruder produced by reclaimed rubber desulfurization, the extrusion temperature is 120°C, and the material extruded by the extruder passes through the die surface pelletizing equipment to form granules, the size of which is 1-10mm, and the density is 0.6- 1.1g / cm 3 , Weigh the mixture of sulfur accounting for 0.5phr of the weight of the plasticized particles and the ac...

Embodiment 2

[0028] Take by weighing 25 parts by weight of waste rubber products processed and ground fine powder as rubber powder, the number of meshes is 15 meshes, 10phr of the weight of the rubber powder Softener——pine tar, 0.07phr of the weight of the rubber powder Activator—waste The mixture of engine oil and alkylphenol disulfide, the mass-to-weight ratio of the two is 8, accounting for 13phr of the weight of the rubber powder. The bonding granulating agent-polyethylene is mixed in a high-speed mixer at a mixing temperature of 110°C and a rotation speed of 1000rpm , to obtain a mixture; the mixture is extruded with an extruder produced by reclaimed rubber desulfurization, and the extrusion temperature is 140 ° C, and the material extruded by the extruder is passed through a die surface pelletizing device to form granules, and the size of the granules is 1 to 10mm. The density is 0.6~1.1g / cm 3, Weigh the mixture of sulfur accounting for 0.5phr of the weight of the plasticized particl...

Embodiment 3

[0030] Take by weighing 20 parts by weight of waste rubber products processed and ground fine powder as rubber powder, the number of mesh is 30 mesh, 10phr of the weight of the rubber powder Softener—aromatic oil, 0.07phr of the weight of the rubber powder Activator—waste A mixture of engine oil and alkylphenol disulfide, the mass ratio of the two is 8, accounting for 13phr of the weight of the rubber powder. Bonding and granulating agent - recycled polyethylene is mixed in a high-speed mixer at a mixing temperature of 100°C and a rotation speed of 1200rpm , to obtain a mixture; the mixture is extruded with an extruder produced by reclaimed rubber desulfurization, and the extrusion temperature is 160 ° C, and the material extruded by the extruder is passed through a die surface pelletizing device to form granules, and the size of the granules is 1 to 10mm. The density is 0.6~1.1g / cm 3 , Weigh the mixture of sulfur accounting for 0.5phr of the weight of the plasticized particle...

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Abstract

The invention discloses a low-temperature environment-friendly rubber asphalt, which is characterized in that: after rubber powder and auxiliaries are mixed, the mixture is subjected to mixed plasticization and granulation through a screw extruder to form plasticized particles; after the plasticized particles are mixed with a reaction crosslinker, the mixture is added and mixed with asphalt to prepare the rubber asphalt at the temperature of between 140 and 170 DEG C; the rubber powder is fine powder prepared by processing and grinding waste rubber products, and the mesh number is 5 to 60 meshes; the auxiliaries are a softening agent, an activating agent and a bonding granulating agent, wherein the softening agent is engine oil, pine tar oil and aromatic oil, the activating agent is a mixture of waste engine oil and alkylphenol disulfide, and the bonding granulating agent is reclaimed polyethylene; and the crosslinker is a mixture of sulfur and an accelerator, namely 2-benzothiazolethiol. The low-temperature environment-friendly rubber asphalt has the advantages of low investment, energy conservation and environmental protection.

Description

technical field [0001] The invention relates to a road construction material, and in particular provides a low-temperature environment-friendly rubber asphalt and a preparation method thereof. Background technique [0002] As we all know, processing waste tires into 20-80 mesh rubber powder and adding it to asphalt at a weight ratio of 15-25% can significantly improve the high and low temperature performance of asphalt, and the road paved with it has the advantages of long life and low noise. Efficient and environmentally friendly utilization of waste resources. [0003] However, at present, the usual process of rubber asphalt (or rubber powder modified asphalt) is to use rubber powder with a mass fraction of more than 15%, the number is 20-60 mesh, and it is obtained by stirring and developing for 1 hour at a temperature above 180°C. The processing temperature of rubber asphalt is higher than 180°C, and it is difficult to heat up, resulting in high energy consumption, low ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L21/00C08K5/13C08K5/01C08L23/06
Inventor 卢长虹郭志刚徐桂荣王仕峰周乃承梁旭郝继祥褚翠兰
Owner 沈阳三鑫集团有限公司
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