Pitch modified from waste tire rubber powder and preparation method thereof

A waste tire and rubber powder technology, which is applied in the field of road asphalt, can solve the problems of limited waste rubber powder addition, cumbersome and complicated process, and high production cost, and achieve the effects of improved storage stability, simple preparation process, and improved performance

Inactive Publication Date: 2010-09-15
JIANGHAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But above-mentioned method technology of waste rubber powder modified asphalt is loaded down with trivial details and complicated, and also needs to add phase solvent or polymer, and this makes production cost on the high side; In addition, waste rubber powder improves storage stability under the effect of coupling agent, but waste rubber powder The addition of rubber powder is limited, which will also increase the cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 14 parts by weight of heavy distillate oil is heated to 90° C. and maintained at a stable temperature, and the heavy distillate oil is atmospheric residue. Then add 84 parts by weight of waste tire rubber powder with a particle diameter of 5 mesh, and 2 parts by weight of auxiliary agent sulfur and mix evenly. Then, the above mixture was irradiated with microwaves with a microwave frequency of 915 MHz for 3 minutes, and the temperature of the material system was controlled at 180° C. Finally, take 40 parts by weight of the above-mentioned modified rubber powder after microwave irradiation, mix it with 60 parts by weight of asphalt at 200°C, maintain the mixing temperature and shear at a high speed of 5000rpm for 20 Minutes, the asphalt sample 1 modified with waste tire rubber powder was obtained.

Embodiment 2

[0026] 8 parts by weight of heavy distillate oil are heated to 130° C. and the temperature is kept stable, and the heavy distillate oil is catalytic cracking clarified oil. Then add 91.6 parts by weight of waste tire rubber powder with a particle size of 20 mesh and 0.4 parts by weight of auxiliary agent dimercaptobenzothiazole and mix well. Then, the above mixture was irradiated with microwaves with a microwave frequency of 915 MHz for 10 minutes, and the temperature of the material system was controlled at 170° C. Finally, take 35 parts by weight of the above-mentioned modified rubber powder after microwave irradiation, mix it with 65 parts by weight of asphalt at 190°C, maintain the mixing temperature and shear at a high speed of 10000rpm for 40 Minutes, the asphalt sample 2 modified with waste tire rubber powder was obtained.

Embodiment 3

[0028] 7 parts by weight of heavy distillate oil, which is lubricating oil produced from vacuum distillation, was heated to 100° C. and maintained at a stable temperature. Then, 92.2 parts by weight of waste tire rubber powder with a particle size of 40 mesh and 0.8 parts by weight of auxiliary polyalkylphenol disulfide were added and mixed evenly. Then, the above mixture was irradiated with microwaves with a microwave frequency of 915 MHz for 5 minutes, and the temperature of the material system was controlled at 180° C. Finally, take 25 parts by weight of the above-mentioned modified rubber powder after microwave irradiation, mix it with 75 parts by weight of asphalt at 185°C, maintain the mixing temperature and shear at a high speed of 8000rpm for 30 Minutes, the asphalt sample 3 modified with waste tire rubber powder was obtained.

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PUM

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Abstract

The invention provides pitch modified from waste tire rubber powder and a preparation method thereof. The preparation method comprises the following steps of: heating 2-14 parts by weight of heavy fraction oil to 90-130 DEG C; adding 84-97.8 parts by weight of waste tire rubber powder and 0.2-2 parts by weight of additives to evenly mix; radiating the mixture by a microwave for 3-10 min; adding 60-85 parts by weight of pitch to 15-40 parts by weight of modified waste tire rubber powder at 160-200 DEG C to mix evenly; and shearing the mixture at a high speed to obtain a mixture, i.e. the modified pitch of the invention. By selecting waste tires as raw materials, the invention has simple and easily obtained raw material, cost saving, environmental protection and pitch performance improvement. The waste tire rubber powder is decarbolized under the microwave radiation to improve the storage stability of the modified pitch. Meanwhile, the waste tires are utilized. The invention has simple modified pitch preparation process and strong practicability.

Description

technical field [0001] The invention relates to a road asphalt, in particular to an asphalt modified with waste tire rubber powder, and also relates to a preparation method of the waste tire rubber powder modified asphalt. Background technique [0002] Rubber powder modified asphalt has been researched and applied as early as the 1960s. Charles McDonald was the first to use waste rubber powder to modify asphalt for road repair, calling it asphalt rubber (asphalt-rubber AR). After the 1980s, a large number of research and development began, and after the 1990s, it was widely used in road paving. After long-term exploration, it has been proved that rubber powder modified asphalt has a series of advantages for paving roads: simple production process and low cost; rich sources of raw materials and low price; the construction process is the same as ordinary asphalt; the paved road surface has good stability and wear resistance , durability, antifreeze, antiskid, noise reduction...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L21/00C08L91/00C08K3/22C08K3/04C08J11/10
CPCY02W30/62
Inventor 万昆余国贤周瑞雪路平李忠铭
Owner JIANGHAN UNIVERSITY
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