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Anti-aging agent and anti-aging asphalt

An anti-aging agent and anti-aging technology, which is applied in the field of road petroleum asphalt, can solve problems such as the complex chemical composition and structure of asphalt, the cost of toxic raw materials of anti-aging agents, and restrictions on the promotion and application of asphalt, so as to improve the performance of heat-oxidative aging resistance and Thermal storage stability, avoidance of thermo-oxidative aging, effect of suppressing thermo-oxidative aging

Inactive Publication Date: 2018-06-12
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the actual operation process, α-naphthylamine volatilizes into the environment with water vapor. Since α-naphthylamine has been proved to be a carcinogen, the anti-aging agent is easy to pollute the environment and endanger the workers.
[0005] Most of the anti-aging agents currently used in asphalt are aimed at the photoaging of asphalt, and there are relatively few anti-aging agents used to inhibit the thermal-oxidative aging of asphalt
Moreover, due to the complex chemical composition and structure of asphalt, the performance of asphalt products produced by different oil sources and different processes is also quite different, so most of the current anti-aging agents are only for a specific type or a specific oil source of asphalt
In addition, the existing anti-aging agents are usually toxic or have high raw material costs, which seriously restrict their promotion and application in asphalt.

Method used

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  • Anti-aging agent and anti-aging asphalt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Take by weight 10 parts of nano carbon black, 40 parts of p-phenylenediamine, 10 parts of p-cresol, 10 parts of C5 petroleum resin, and 30 parts of rubber oil.

[0041] Put the above-mentioned C5 petroleum resin, nano-carbon black and rubber oil in a metal container, and use a stirrer to stir at a rate of 500rpm for about 10min at 100±5°C; maintain the above temperature, add p-phenylenediamine and p-cresol, and Stir at a speed of 500 rpm for about 10 minutes to obtain an anti-aging agent.

[0042] Heat base asphalt A (penetration of 80dmm at 25°C, softening point of 49°C) to 145-150°C, add the above anti-aging agent, and stir at a speed of 750rpm for about 30min to obtain anti-aging asphalt, in which the anti-aging agent The mass content is about 1%.

[0043] The comparison results of the penetration (0.1mm), softening point (°C) and ductility (cm) at 5°C of base asphalt A and aging-resistant asphalt before and after TFOT aging are shown in Table 1.

[0044] Table 1 C...

Embodiment 2

[0050] Take by weight 15 parts of nano-carbon black, 40 parts of p-phenylenediamine, 15 parts of p-cresol, and 30 parts of rubber oil.

[0051] Put the above-mentioned nano-carbon black and rubber oil in a metal container, and stir with a stirrer at a rate of 500rpm for about 10min at 100±5°C; Stir at a high speed for about 10 minutes to obtain an anti-aging agent.

[0052] Heat base asphalt B (penetration of 70dmm at 25°C and softening point of 50°C) to 145-150°C, add the above-mentioned anti-aging agent, and stir at a speed of 750rpm for about 30 minutes to obtain an aging-resistant asphalt. The mass content of the agent is about 0.5%.

[0053] The comparison results of the penetration (0.1mm), softening point (°C) and ductility (cm) at 5°C of base asphalt B and aging-resistant asphalt before and after TFOT aging are shown in Table 2.

[0054] Table 2 Comparison of base asphalt B and aging-resistant asphalt before and after TFOT

[0055]

[0056] According to the above...

Embodiment 3

[0059] Take by weight 20 parts of nano carbon black, 45 parts of p-phenylenediamine, 5 parts of p-cresol, and 30 parts of rubber oil.

[0060] Put the above-mentioned nano-carbon black and rubber oil in a metal container, and stir with a stirrer at a rate of 500rpm for about 10min at 100±5°C; maintain the above temperature, and continue to add p-phenylenediamine and p-cresol, and continue to Stir at a high speed for about 10 minutes to obtain an anti-aging agent.

[0061] Heat base asphalt C (penetration of 50dmm at 25°C, softening point of 62°C) to 145-150°C, add the above anti-aging agent, and stir at a speed of 750rpm for about 30 minutes to obtain an aging-resistant asphalt. The mass content of agent is about 1%.

[0062] The comparison results of the penetration (0.1mm), softening point (°C) and ductility (cm) at 5°C of base asphalt C and aging-resistant asphalt before and after TFOT aging are shown in Table 3.

[0063] Table 3 Comparison of base asphalt C and aging-res...

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Abstract

The invention provides an anti-aging agent and anti-aging asphalt. The anti-aging agent comprises the following components in parts by weight: 10-20 parts of nano carbon black, 40-60 parts of p-phenylenediamine, 5-15 parts of p-cresol, 0-10 parts of a petroleum resin and 30-40 parts of high-aromatic hydrocarbon oil. The anti-aging asphalt provided by the invention comprises asphalt and the anti-aging agent, and the content of the anti-aging agent is 0.5-1.0 wt%. By adopting the anti-aging agent provided by the invention, thermal oxidation aging of asphalt can be effectively inhibited, so thatthe thermal aging resistance of the asphalt is improved, and the storage stability of the asphalt can be improved.

Description

technical field [0001] The invention relates to an anti-aging agent and anti-aging asphalt, belonging to the technical field of road petroleum asphalt. Background technique [0002] Petroleum asphalt has become the most commonly used pavement material for road construction, especially expressway construction, due to its good cohesiveness and plasticity. With the development of my country's economic construction, the traffic volume is increasing rapidly. Due to overloading and vehicle channelization traffic, the operation of asphalt pavement is facing a severe test. Soon after many asphalt pavements are built, temperature shrinkage cracks will appear and cracks will form, which will seriously affect the service life of asphalt pavements. Asphalt aging is the main factor affecting the service life of asphalt pavement. Asphalt aging refers to physical and chemical effects such as volatilization, oxidation, decomposition, and polymerization of asphalt under the action of envir...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L57/02C08L91/00C08K3/04C08K5/18C08K5/13
CPCC08K2201/011C08L95/00C08L2201/08C08L2205/03C08L57/02C08L91/00C08K3/04C08K5/18C08K5/13
Inventor 孙艳孟伟马晓金李江黄奋生赵晓龙张群
Owner PETROCHINA CO LTD
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