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Ultraviolet aging-resistant compound modified asphalt and preparation method thereof

A compound modified asphalt anti-ultraviolet aging technology, which is applied in the field of road asphalt modification, can solve the problems of unreasonable ratio of rubber powder and furfural oil extraction, affect the anti-ultraviolet performance of asphalt, and insufficient swelling of rubber powder, etc. Effects of UV performance, photooxidation resistance, excited state energy, and UV aging resistance improvement

Active Publication Date: 2013-06-12
HUBEI GUOCHUANG HI TECH MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In summary, there is no pretreatment of rubber powder in the prior art, so that the utilization rate of rubber powder in this prior art is very low. Due to the small amount of rubber powder and the small amount of carbon black in it, it affects the resistance of asphalt. Ultraviolet performance; the unreasonable ratio of rubber powder and furfural oil leads to insufficient swelling of rubber powder, affecting the best range of performance indicators such as penetration and softening of modified asphalt, or due to the increase in the amount of furfural oil cost increase

Method used

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  • Ultraviolet aging-resistant compound modified asphalt and preparation method thereof
  • Ultraviolet aging-resistant compound modified asphalt and preparation method thereof
  • Ultraviolet aging-resistant compound modified asphalt and preparation method thereof

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Embodiment approach

[0032] In the following specific examples, the base asphalt is 70#A grade road petroleum asphalt. The waste rubber powder is waste rubber tire tread rubber powder, the carbon black content is between 28-58wt%, and the particle size is between 45-80 mesh. The molecular weight of the styrene-butadiene-styrene block copolymer (SBS) is between 100,000 and 300,000, and the type is linear, star or mixed (linear and star in any proportion mix). The rock asphalt is natural asphalt with a bitumen content of 80-95wt%, and trichlorethylene insoluble matter is less than 20wt%.

[0033] The swelling agent is furfural extracted oil after dewaxing treatment, which is rich in aromatic components, and the content of the aromatic components is between 68wt% and 78wt%.

[0034] The activator is 2,2-bis(6-tert-butyl-p-phenol) disulfide,

[0035] Described plasticizer is diethylene glycol dibenzoate.

[0036] The stabilizer is several compositions of sulfur, zinc oxide, stearamide, dithiol ben...

specific Embodiment 1

[0037] A kind of anti-ultraviolet aging composite modified asphalt, it is based on 100 parts by weight of matrix asphalt, plus SBS, waste rubber powder, rock asphalt, swelling agent, activator, plasticizer, stabilizer, these raw materials are in steps, by Prepared by processes such as swelling, shearing, and stirring development, the following is added based on 100 parts of base asphalt, and the parts of each component are as follows:

[0038]

[0039] The preparation method is as follows: first, swell waste rubber powder, take 180g waste rubber powder with a high-temperature resistant container with a cover, add 25g swelling agent, 2g activator, 10g plasticizer, preheat (the preheating temperature is 160°C) and put Stir and mix the rubber powder and various additives evenly, then put the lid on and put it in an oven for 2 hours at 180°C to obtain swollen waste rubber powder; the second step is to prepare modified asphalt, heating 1000g of base asphalt to 140°C, Add 10g of ...

specific Embodiment 2

[0042] A kind of anti-ultraviolet aging composite modified asphalt, it is based on 100 parts by weight of matrix asphalt, plus SBS, waste rubber powder, rock asphalt, swelling agent, activator, plasticizer, stabilizer, these raw materials are in steps, by Prepared by processes such as swelling, shearing, and stirring development, the following is added based on 100 parts of base asphalt, and the parts of each component are as follows:

[0043]

[0044] The preparation method is as follows (the second method): at first swell the waste rubber powder, get 120g waste rubber powder with a high temperature resistant container with a cover, add 12g swelling agent, 1.2g activator, 8g plasticizer, preheat (the preheating temperature 158°C), mix the rubber powder and various additives evenly, then add 240g of base asphalt (160°C), mix evenly, then cover and put it in an oven for 2 hours at 180°C to obtain swollen waste rubber powder; the second step is to prepare modified asphalt, he...

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Abstract

The invention belongs to the technical field of road asphalt modification and relates to an ultraviolet aging-resistant compound modified asphalt, wherein on the basis of 100 parts by weight of matrix asphalt, in parts by weight, 1-6 parts of styrene-butadiene-styrene block copolymer, 3-18 parts of waste rubber powder, 5-10 parts of rock asphalt, 0.3-2.5 parts of sweller, 0.03-0.2 part of activator, 0.1-1 part of plasticizer and 0.2-0.5 part of stabilizer are further added, wherein the sweller is furfural extract oil which is subjected to dewaxing treatment previously; the furfural extract oil contains 60wt%-88wt% of aromatic components which contain 40-65wt% of heavy aromatic hydrocarbon; and the waste rubber powder is waste rubber tire tread rubber powder having the content of carbon black between 28wt% and 58wt% and the grain diameter between 45 and 80 meshes. The ultraviolet aging-resistant compound modified asphalt provided by the invention is up to the standard of the polymer modified asphalt in performance, and the ultraviolet aging resistance of the asphalt is improved to a large extent; and waste resources are utilized.

Description

technical field [0001] The invention belongs to the technical field of road asphalt modification, and relates to an anti-ultraviolet aging composite modified asphalt and a preparation method thereof. Background technique [0002] With the development of the national economy, the development of expressways is getting faster and faster, and the application of polymer modified asphalt is increasing rapidly. People's technical research on modified asphalt has become more extensive and in-depth, but there are still many problems that have not been well solved so far. solution. Asphalt is exposed to the natural environment and subjected to high-temperature solar radiation, thermal oxygen aging will occur under the action of heat, and at the same time, photochemical reactions will occur under the action of high-energy ultraviolet rays, which will cause photooxidative aging of asphalt. These two forms of aging will reduce the asphalt. road performance [0003] The thermo-oxidative...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L53/02C08L21/00C08K13/02C08K5/01C08K3/04C10G53/02
Inventor 涂娟陈颖娣范春华吴玉德林伟东章波
Owner HUBEI GUOCHUANG HI TECH MATERIAL
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