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Road asphalt anti-aging agent and preparation method thereof

A technology of road asphalt and anti-aging agent, which is used in building components, building thermal insulation materials, buildings, etc., can solve the problems of limited all-weather aging resistance of asphalt, poor water-damage resistance of anti-aging asphalt, and high price, and achieve all-weather resistance of road asphalt. Good aging performance, improved all-weather aging resistance, low production cost

Active Publication Date: 2018-07-06
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to improve the all-weather aging resistance of road asphalt, in addition to selecting crude oil suitable for the production of high-quality asphalt materials, some technological measures have been taken, such as shallow oxidation, solid storage, nitrogen protection, etc., but these measures have no effect on improving the all-weather resistance of road asphalt The aging effect is limited, therefore, the use of additives to improve the all-weather aging resistance of asphalt has become an important way
[0005] CN104356659A discloses an asphalt anti-aging agent and its preparation method and application. The formula of the anti-aging agent contains 5-10 wt% of emulsifier and 5-10 wt% of water; the process of preparing anti-aging asphalt is to mix 0.2-0.8 Wt% of the above aging agent is added to the asphalt at 120-180°C, due to the existence of water, the phenomenon of "overfilling the pot" is very easy to occur in the process, and the anti-aging asphalt has poor water damage resistance
However, the all-weather aging of asphalt includes not only light aging, but also temperature aging, oxidative aging and water aging, so it is limited to improve the anti-all-weather aging performance of asphalt
In addition, the price of cerium oxide is high, resulting in high production cost of the aging agent

Method used

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  • Road asphalt anti-aging agent and preparation method thereof
  • Road asphalt anti-aging agent and preparation method thereof
  • Road asphalt anti-aging agent and preparation method thereof

Examples

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preparation example Construction

[0032] A preparation method of road asphalt anti-aging agent, comprising the following steps:

[0033] (1) After mixing the nano-calcium carbonate, carbonamide, aromatic amine antioxidant and zinc oxide with a weight ratio of 5-30:15-55:20-60:5-40, prepare a stabilizer with uniform particles ;

[0034] (2) Mix the catalytic oil slurry and aromatic oil and heat it to a molten state, then add waste rubber powder and deoiled asphalt and mix and swell, and finally add the stabilizer obtained in step (1) and stir evenly to obtain road asphalt anti-aging agent, wherein the weight ratio of catalytic oil slurry, aromatic oil, waste rubber powder, deoiled asphalt, and stabilizer is 1-20:30-60:5-20:5-20:5-40.

[0035] In the preparation method provided by the present invention, the stabilizer prepared into uniform particles can be prepared into uniform fine particles by using an extruder. Preferably, the particle length of the stabilizer is in the range of 0.5-5mm.

[0036] A prepara...

Embodiment 1

[0048] Embodiment 1 illustrates the composition and preparation method of road asphalt antiaging agent.

[0049] Weigh 12g of nano-calcium carbonate, 33g of carbonamide, 40g of aromatic amine antioxidant, and 15g of zinc oxide, mix the above ingredients uniformly at room temperature, and prepare them into 1mm-long thin strips through an extruder to obtain the stabilizer , labeled WDJ1, spare.

[0050] Weigh 10g of catalytic oil slurry and 108g of aromatic oil respectively and pour them into a heatable vessel, and heat the mixture of 10g of catalytic oil slurry and 108g of aromatic oil to 175°C. 24g of 60-80 mesh waste automobile tire rubber powder was added thereto, and the temperature was maintained at 175° C. and stirred for 2 hours to fully swell the waste tire rubber powder. At this time, 16 g of deoiled asphalt with a softening point of 90° C. was added and stirred for 1 hour at a temperature of 175° C. to completely dissolve the deoiled asphalt. Add 42g of WDJ1 into th...

Embodiment 2

[0052] Weigh 16g of catalytic oil slurry and 102g of aromatic oil respectively and pour them into a heatable vessel, and heat the mixture of 16g ​​of catalytic oil slurry and 102g of aromatic oil to 175°C. 28g of 60-80 mesh waste automobile tire rubber powder was added thereto, and the temperature was maintained at 175° C. and stirred for 3 hours to fully swell the waste tire rubber powder. At this point, 12 g of deoiled asphalt with a softening point of 90° C. was added and stirred for 1 hour at a temperature of 175° C. to completely dissolve the deoiled asphalt. Add 42g of WDJ1 into the above mixture, and continue stirring for 1.5h to make it completely mixed to obtain an anti-aging agent, marked as KLJ2.

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Abstract

The invention relates to a road asphalt anti-aging agent and a preparation method thereof. The road asphalt anti-aging agent comprises the following raw materials by weight percentage: 5-20wt% of waste rubber powder, 5-20wt% of deoiled asphalt, 1-20wt% of catalytic oil slurry, 30-60wt% of aromatic hydrocarbon oil, and 5-40wt% of a stabilizer. Specifically, the stabilizer contains 5-30wt% of nano calcium carbonate, 15-55wt% of carbamide, 20-60wt% of an aromatic amine antioxidant and 5-40wt% of zinc oxide. The preparation method of the road asphalt anti-aging agent provided by the invention hasthe characteristics of low production cost and simple process. The road asphalt anti-aging agent prepared by the method has good intermiscibility with the matrix road asphalt, can effectively improvethe matrix asphalt's all-weather aging resistance, including ultraviolet light irradiation aging, temperature aging and water aging conditions.

Description

technical field [0001] The invention relates to an anti-aging agent for road asphalt materials and a preparation method thereof, as well as aging-resistant asphalt and a preparation method thereof. Background technique [0002] Petroleum asphalt has good cohesiveness, impermeability, insulation and other properties, so it is widely used in highway engineering. However, during the storage, transportation, construction and use of petroleum asphalt, it will experience the effects of heat, air, rain and light, etc., resulting in a series of physical and chemical changes, which will cause the asphalt to harden and become brittle, specifically reflected in asphalt Penetration decreases, softening point increases, ductility decreases, viscosity increases, brittle point increases, etc., resulting in cracking of asphalt pavement, aggregate spalling and other aging phenomena, and cannot continue to exert its original bonding and sealing effect , shorten the service life of asphalt pa...

Claims

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Application Information

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IPC IPC(8): C08L21/00C08L95/00C08K13/02C08K3/26C08K3/22C08K5/21
CPCC08K2201/011C08L21/00C08L95/00C08L2201/08C08K13/02C08K2003/265C08K2003/2296C08K5/21
Inventor 王翠红佘玉成王红
Owner CHINA PETROLEUM & CHEM CORP
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