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Method for preparing high-dispersity carbon nano tube modified asphalt

A carbon nanotube modification and high dispersion technology, which is applied in building components, building insulation materials, buildings, etc., can solve the problems of high price, the performance of modified asphalt has yet to be studied, and the microstructure is damaged, so as to achieve cost saving and retention. High-quality performance, no damage to equipment

Inactive Publication Date: 2015-03-25
SOUTHEAST UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the acidification treatment of carbon nanotubes, its microstructure is destroyed, and the effectiveness of the final modified asphalt remains to be studied.
[0019] On the whole, the more effective method is to use ultrasonic dispersion equipment to disperse CCNTs in asphalt, but the equipment (1) is very expensive (2) every time The amount of preparation is very small (3) It cannot be applied in engineering and can only be used for laboratory research

Method used

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  • Method for preparing high-dispersity carbon nano tube modified asphalt
  • Method for preparing high-dispersity carbon nano tube modified asphalt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1) Heat the base asphalt to a liquid state (110°C), pour it into a mixing cup, and weigh it;

[0035] 2) Weigh the carboxylated carbon nanotube material according to 1% of the weight of the pitch (the carboxyl ratio is 2%); weigh the sodium dodecylbenzenesulfonate according to 0.3% of the weight of the pitch;

[0036] 3) Add the carboxylated carbon nanotube material and sodium dodecylbenzenesulfonate weighed in the previous step into the asphalt, extend the working part of the shearing machine into the asphalt, set the speed at 3000 rpm, and work 20min, the shear temperature is 160°C.

Embodiment 2

[0038] 1) Heat the base asphalt to a liquid state (120°C), pour it into a mixing cup, and weigh it;

[0039] 2) Weigh carboxylated carbon nanotube material according to 2% of pitch weight (carboxyl ratio is 2%); weigh sodium dodecylbenzenesulfonate according to 0.4% of pitch weight;

[0040] 3) Add the carboxylated carbon nanotube material and sodium dodecylbenzenesulfonate weighed in the previous step into the asphalt, extend the working part of the shearing machine into the asphalt, set the speed at 4000 rpm, and work 30min, the shear temperature is 170°C.

Embodiment 3

[0042] 1) Heat the base asphalt to a liquid state (130°C), pour it into a mixing cup, and weigh it;

[0043] 2) Weigh carboxylated carbon nanotube material according to 3% of pitch weight (carboxyl ratio is 2%); weigh sodium dodecylbenzene sulfonate according to 0.5% of pitch weight;

[0044] 3) Add the carboxylated carbon nanotube material and sodium dodecylbenzenesulfonate weighed in the previous step into the asphalt, extend the working part of the shearing machine into the asphalt, set the speed at 5000 rpm, and work 40min, the shear temperature is 180°C.

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Abstract

The invention discloses a method for preparing high-dispersity carbon nano tube modified asphalt. The compatibility between a carboxylated carbon nano tube material and asphalt is improved by using sodium dodecyl benzene sulfonate as a surfactant; effective and uniform dispersion of the carbon nano tube in matrix asphalt is achieved by assistance of high-speed shearing; and uniform and stable isotropic carboxylated carbon nano tube modified asphalt is prepared. An experiment proves that the working properties and high-and-low temperature properties of the modified asphalt prepared by the method are effectively improved.

Description

technical field [0001] The invention belongs to the field of road materials and relates to a preparation method of carboxylated carbon nanotube modified asphalt. Background technique [0002] Asphalt pavement is the most widely used high-grade pavement in road construction at all levels in my country. After the construction is completed and opened to traffic, various diseases will gradually appear on the asphalt pavement, which will eventually affect driving and require refurbishment. These diseases mainly fall into four categories: [0003] 1) Deformation class [0004] Rutting is a kind of deformation, which refers to the longitudinal strip-shaped grooves on the road surface along the tracks of running wheels. Rutting is a belt-shaped groove formed by the accumulation of permanent deformation on the road surface under repeated driving loads. Ruts reduce the smoothness of the road surface. When the ruts reach a certain depth, due to the accumulation of water in the ru...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/03C08L95/00C08K9/04C08K7/24
Inventor 杨军刘慧杰童天志牛晓伟龚明辉王萌吴春颖
Owner SOUTHEAST UNIV
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