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Road asphalt anti-aging agent and use method thereof

An anti-aging agent and anti-aging technology, which is applied in the field of road petroleum asphalt, can solve the problems that the anti-ultraviolet aging ability of asphalt is not significantly improved, the anti-aging agent has a single effect, and there is no multi-functional anti-aging technology, so as to improve the anti-ultraviolet light Effects of aging performance, low market price, and mild experimental conditions

Active Publication Date: 2021-07-13
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the main research direction is still focused on the research of anti-aging materials, but different material types, dosages and use conditions have a significant impact on the effect, and the effect of anti-aging agents is relatively simple, and there is no anti-ultraviolet, high temperature , oxygen, ozone, rain and other all-weather multifunctional anti-aging technology
For example, layered double metal hydroxide has high UV reflectivity, which can improve the anti-ultraviolet aging performance of asphalt, but its compatibility with asphalt is poor, and it cannot be uniformly and stably dispersed in asphalt
Some antioxidants have a good anti-oxidation effect on resin materials, but the improvement of anti-ultraviolet aging ability of asphalt is not obvious

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Add 1%, 3%, 5%, and 7% anti-aging agents to the original asphalt. Take the anti-aging agent required to improve the anti-aging performance of 500g of asphalt as an example.

[0024] Preparation method:

[0025] Firstly, the anti-aging agent was pulverized into a powder in a mortar, and then 5 g, 15 g, 25 g, and 35 g of the anti-aging agent were weighed into containers to obtain the asphalt anti-aging agent. The anti-aging agent of the present invention is mainly used for improving the anti-aging performance of asphalt materials, and needs to be used in conjunction with asphalt. Heat the asphalt as it is in an oven at 135°C±5°C to a fluid state, then move it into a constant temperature oil bath at 140°C±5°C and slowly add anti-aging agent, and manually stir it with a glass rod at a speed of about 60r / min for 10 minutes to make the anti-aging agent Dissolve the aging agent evenly into the asphalt, then use a high-torque electric mixer to stir for 45 minutes at a speed o...

Embodiment 2

[0028] Add 1%, 3%, 5%, and 7% antioxidants to the original asphalt, and take the antioxidant needed to improve the anti-aging performance of 500g original asphalt as an example.

[0029] The preparation method is the same as that of Example 1.

[0030] Then, through the DSR frequency scanning experiment and temperature scanning experiment, compare the complex modulus and rutting factor changes in different types of unaged, in order to evaluate the effect of different dosages of antioxidants on the original asphalt, and then determine the dosage of antioxidants .

Embodiment 3

[0032] Add 0.5%, 1% light stabilizer and 1%, 3% light shielding agent to the original asphalt respectively, taking the anti-aging agent required to improve the anti-aging performance of 500g original asphalt as an example.

[0033] The preparation method is the same as that of Example 1.

[0034] Then use the following conditions for ultraviolet aging: the light source is 6 UVA-340 ultraviolet lamp tubes laid on the top of the equipment. After RTFOT aging, the original asphalt, light shielding agent modified asphalt, and light stabilizer modified asphalt samples were subjected to ultraviolet aging. The film thickness of the asphalt sample was 0.8mm, the aging temperature was set at 60°C, and the light intensity was 5.0W / M 2 , the aging time is 200 hours. Through DSR frequency scanning experiment and temperature scanning experiment, the complex modulus and rutting factor changes in the aging process are compared to evaluate the anti-aging effect of different dosages of antiagi...

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Abstract

The invention discloses a road asphalt anti-aging agent and a use method thereof. The road asphalt anti-aging agent comprises an anti-aging agent, an antioxidant and a light stabilizer, the anti-aging agent is a nickel-containing compound and is dark green in color; the antioxidant is an amine compound and is white; and the light stabilizer is a hindered amine substance and is white. The required raw materials have the characteristics of low carbon, environment friendliness, wide source, low market price and the like, the preparation process of the composite anti-aging agent is simple, the experimental conditions are mild, large preparation instruments are not needed, and industrialization is easy to realize. Besides, a large number of researches prove that the obtained composite anti-aging agent has small influence on original asphalt and can effectively resist the influence of long-term aging on the asphalt, the added anti-aging agent and antioxidant can effectively resist the influence of high temperature, oxygen, ozone and the like on the asphalt, and the light stabilizer is also beneficial to improving the ultraviolet aging resistance of the asphalt.

Description

technical field [0001] The invention mainly relates to an asphalt antiaging agent for roads and a using method thereof, belonging to the field of road petroleum asphalt technology. Background technique [0002] During the service process, asphalt pavement is exposed to high temperature, light, oxygen, ultraviolet rays, rain and other complex environments for a long time. Affected by the natural environment, it is very easy to cause cracks, rutting, looseness, potholes and other diseases. Among them, asphalt is used as a bond The main cementing materials of coarse and fine aggregates, mineral powder, and additives will produce an "irreversible" chemical change, which will greatly accelerate the occurrence and development of road diseases, reduce the performance and service life of asphalt pavement, and bring new problems to road maintenance. Great challenge, therefore, improving the anti-aging performance of pavement will contribute to the development of long-life asphalt pav...

Claims

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Application Information

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IPC IPC(8): C08K5/00C08L95/00
CPCC08K5/005C08L95/00C08L2201/08Y02A30/60
Inventor 郭猛梁美琛付烨刘海清
Owner BEIJING UNIV OF TECH
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