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High molecular radiation crosslinking modified asphalt and preparation process

A polymer modifier and cross-linking modification technology, which is applied in the chemical processing of tar asphalt/petroleum asphalt/natural asphalt, etc. It can solve the problems of low resistance to high temperature permanent deformation, increase of tensile strength, and decrease of temperature sensitivity. , to prevent high temperature loss, improve the performance of asphalt, and improve the quality of asphalt

Inactive Publication Date: 2006-09-13
NORTHWEST NORMAL UNIVERSITY
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Problems solved by technology

[0005] There are many kinds of modifiers used for asphalt modification. For most polymer modifiers, their main function is to solve the problems encountered in the use of pavement asphalt: (1) to improve the ability to resist high temperature permanent deformation, (2) Increase low-temperature elasticity, (3) Improve fatigue resistance of asphalt, (4) Increase tensile strength, (5) Reduce temperature sensitivity

Method used

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  • High molecular radiation crosslinking modified asphalt and preparation process
  • High molecular radiation crosslinking modified asphalt and preparation process
  • High molecular radiation crosslinking modified asphalt and preparation process

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Embodiment

[0032] Add base asphalt into the pre-mixer with stirring paddle, heat up and melt, start stirring, keep the temperature at 180-200°C and add, drive away traces of water vapor, add the crushed modifier, stir and mix, in the mixture The weight percentage of the base asphalt is 94%, and the weight percentage of the polymer modifier is 6%; after the blend is uniformly mixed at 200 ° C ± 2 by 2000 rpm high-speed shearing, it is put into a special The mold was cooled to room temperature, and sent to cobalt-60 room for irradiation, and the irradiation dose was 10Mrad. After irradiation, film removal and packaging, elemental analysis, four-component determination, FT-IR, optical microphotography, scanning electron microscopy, transmission electron microscopy analysis, and determination of penetration, softening point, ductility, wax content, and film oven experiment.

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Abstract

The modified asphalt is make up asphalt with higher wax content as substrate, added with macromolecular modifier and cobalt-60 to make irradiation. By adding macromolecular modifier in the asphalt substrate and making irradiation under the condition of irradiation it can make unsaturated bond being in the macromolecular modifier and free-radical produced by wax contained in the asphalt produce cross-linking reaction, so that it can reduce wax content in the asphalt, can obviously raise ductility of asphalt and can improve property of asphalt.

Description

technical field [0001] The invention relates to an asphalt modification technology. Background technique [0002] Since domestic crude oil is mostly paraffin-based crude oil, the produced asphalt wax content is high, the elongation and consistency are low, the sensitivity to temperature is strong, and the road performance is poor, so it is difficult to meet the requirements of high-grade highway construction. Although my country has been committed to the research and development of high-grade highway asphalt production for many years, the heavy oil resources suitable for producing heavy traffic asphalt mainly include Karama, Huanxiling and Bohai Suizhong 36-1, and their resources are very limited. The rapid development of my country's high-grade highway construction since the 1990s has resulted in a shortage of high-grade highway asphalt, and a large amount of foreign asphalt has poured into the Chinese market. [0003] It is also an important way to solve the contradiction...

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Application Information

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IPC IPC(8): C10C3/02C08J3/28
Inventor 王云普刘玉阳王荣民张继李玉峰
Owner NORTHWEST NORMAL UNIVERSITY