Special additive for waste asphalt mixture heat regeneration and preparation method thereof

A waste asphalt, heat regeneration technology, applied in the direction of building insulation materials, building components, buildings, etc., can solve the problems of air pollution, difficulty, non-renewable, etc., to save asphalt and gravel materials, simple processing technology, easy to use Effect

Active Publication Date: 2013-05-15
XIAN ZHONGLI ASPHALT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The publication number published in 2007 is CN101041743A, and the patent titled "Pavement Asphalt Rejuvenator" discloses a kind of asphalt rejuvenator and its preparation method. Oil is also a non-renewable resource, and volatilization into the air will cause certain air pollution
Moreover, the light oil regenerants used in our country in the early 1980s are also made of light oil such as diesel oil. The use effect shows that their softening effect on asphalt can only be short-term, and the long-term effect is not good.
The patent ZL200710078414.6 "An old asphalt pavement regeneration additive and its method for preparing recycled asphalt pavement mixture" authorized in 2008 uses tung oil as the main raw material of the regeneration agent, which needs to be mixed with new asphalt during the use of the regeneration agent Uniformity can be used in waste asphalt mixture, and there are certain difficulties in the construction process on site

Method used

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  • Special additive for waste asphalt mixture heat regeneration and preparation method thereof
  • Special additive for waste asphalt mixture heat regeneration and preparation method thereof
  • Special additive for waste asphalt mixture heat regeneration and preparation method thereof

Examples

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Embodiment 1

[0021] A special additive for thermal regeneration of waste asphalt mixture, which consists of 50-100 parts of high-aromatic mineral oil, 3-10 parts of tung oil prepolymer, and 5-20 parts of plasticizer according to the ratio of parts by mass. The high-aromatic mineral oil is furfural extracted oil and more than one of coal tar, and the plasticizer is dibutyl phthalate, dioctyl phthalate, and diisooctyl phthalate. more than one.

[0022] The preparation method of described tung oil prepolymer carries out according to the following steps:

[0023] 1), adding aluminum chloride and absolute ethanol solution to tung oil, stirring evenly to form an emulsion;

[0024] 2), the emulsion is heated to 220~250 ℃ and continues to stir for 0~1.5h, is cooled to room temperature, promptly obtains described tung oil prepolymer, and the mass parts of aluminum chloride in its tung oil prepolymer: dehydrated alcohol: tung oil The numbers are 2 to 3 parts: 100 to 200 parts: 500 to 600 parts.

...

Embodiment 2

[0029] A special additive for thermal regeneration of waste asphalt mixture, which consists of 60-90 parts of high-aromatic mineral oil, 4-8 parts of tung oil prepolymer, and 8-18 parts of plasticizer according to the ratio of parts by mass. The high-aromatic mineral oil is furfural extracted oil and more than one of coal tar, and the plasticizer is dibutyl phthalate, dioctyl phthalate, and diisooctyl phthalate. More than one, the preparation method of tung oil prepolymer and special additive is the same as embodiment 1.

Embodiment 3

[0031] A special additive for thermal regeneration of waste asphalt mixture, which consists of 65-85 parts of high-aromatic mineral oil, 5-7 parts of tung oil prepolymer, and 10-15 parts of plasticizer according to the ratio of parts by mass. The high-aromatic mineral oil is furfural extracted oil and more than one of coal tar, and the plasticizer is dibutyl phthalate, dioctyl phthalate, and diisooctyl phthalate. More than one, the preparation method of tung oil prepolymer and special additive is the same as embodiment 1.

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Abstract

The invention discloses a special additive for waste asphalt mixture heat regeneration and a preparation method thereof. The special additive comprises the following components in parts by weight: 50-100 parts of mineral oil with high content of aromatic hydrocarbons, 3-10 parts of tung oil prepolymer, and 5-20 parts of plasticizer. The preparation method comprises the following steps: heating 50-100 parts of mineral oil with high content of aromatic hydrocarbons to 80-120 DEG G; adding 5-20 parts of plasticizer and 3-10 parts of tung oil prepolymer; and stirring for 30 minutes, and cooling to room temperature to obtain the special additive for waste asphalt mixture heat regeneration. The special additive provided by the invention is used in the construction processes of asphalt pavement plant-mixing heat regeneration and in-site heat regeneration. By using the special additive, the viscosity, ductility, penetration, durability and other indicators of the regenerated aged asphalt can meet operating requirements, so that the waste asphalt mixture is recycled. The special additive saves cost and is environment-friendly, and has good social and economic benefits.

Description

technical field [0001] The invention relates to a special additive for thermal regeneration of waste asphalt mixture and a preparation method thereof. Background technique [0002] During the long-term use of asphalt pavement, the asphalt will gradually age due to oxidation, temperature changes, rain, ultraviolet rays, and loads. After aging, the chemical composition and rheological properties of asphalt change, resulting in a sharp increase in viscosity, a decrease in penetration, an increase in softening point, and a significant decrease in ductility, which gradually reduces the road performance of the asphalt mixture until cracks appear , Loose, potholes and other problems affect the normal use of the road surface, it needs to be repaired and transformed by means of milling, regeneration, resurfacing, etc. The recycling of the waste asphalt mixture produced in this process has always been a worldwide environmental protection topic that has attracted much attention. Peopl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L91/00C08K5/00C08K5/01C08K5/12
Inventor 张玲张巧宁张曾天彭茂泉韩耀斌张晓宏
Owner XIAN ZHONGLI ASPHALT CO LTD
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