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Environment-friendly waste asphalt mixture regeneration agent with solubilizing effect and preparation method thereof

A waste asphalt, environmentally friendly technology, applied in the field of asphalt pavement materials, can solve problems such as insufficient stability, poor penetration of regenerants, and restrictions on asphalt pavement regeneration technology

Active Publication Date: 2022-05-17
CHANGAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Too low dosage will not only lead to a large accumulation of waste asphalt mixture, but also increase management costs, and most of them will eventually be downgraded to use (such as for road base or low-grade roads) or discarded
Therefore, the quality of the regenerant is the key to the regeneration technology. The existing regenerants have poor thermal stability and penetration ability, and cannot improve the degree of miscibility of old and new asphalt. In addition, the stiffness modulus of the mixture will increase, and the low-temperature performance will be poor. Poor workability, difficult compaction and other problems seriously restrict the application of asphalt pavement regeneration technology
[0003] In view of the above technical status and the poor penetration of regenerants, it is urgent to develop an environmentally friendly waste asphalt mixture regenerant with solubilizing effect to solve the problems of poor penetration, insufficient stability, and high cost of existing regenerants. Improving Utilization Rate and Service Ability of Waste Asphalt Mixture

Method used

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  • Environment-friendly waste asphalt mixture regeneration agent with solubilizing effect and preparation method thereof

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preparation example Construction

[0028] The preparation method of the environment-friendly waste asphalt mixture regeneration agent with solubilizing effect of the present invention comprises the following steps:

[0029] 1) waste and old rubber powder is carried out microwave treatment;

[0030] 2) mixing and stirring the catalytic cracking oil slurry, waste epoxidized soybean oil, sodium dodecylbenzenesulfonate and polyisobutenyl succinimide to obtain a mixture;

[0031] 3) heating the mixture obtained in step 2), then adding polyisobutylene maleic acid amide, hindered amine light stabilizer and isobutyltriethoxysilane in sequence, and then stirring;

[0032] 4) Heat the mixture obtained in step 3) to 120°C, then add the waste rubber powder treated in step 1), and stir at 120°C for 40 minutes to obtain an environmentally friendly waste asphalt mixture regenerant with solubilizing effect.

[0033] The specific operation of step 1) is: microwave treatment of waste rubber powder under 600w power for 1h;

[0...

Embodiment 1

[0037] The environmentally friendly waste and old asphalt mixture regeneration agent with solubilizing effect of the present invention consists of 14.7% waste rubber powder, 70% oil, 4% solubilizer, 3% polyisobutylene maleic acid amide, Prepared with 2.3% hindered amine light stabilizer and 6% isobutyltriethoxysilane.

[0038] The oil component is composed of 70% by mass percentage of catalytic cracking oil slurry and 30% of waste epoxidized soybean oil.

[0039] The relative density of the catalytic cracking oil slurry is 1.161, and the catalytic cracking oil slurry is composed of 70% aromatics, 15% saturates, 9% colloids and 6% asphaltenes by mass percentage; It is obtained after frying for 1 hour and filtering the residue. The initial epoxy value is greater than 8%.

[0040] The mass percentage of the solubilizer is composed of 65% sodium dodecylbenzenesulfonate and 35% polyisobutenyl succinimide.

[0041] The waste rubber powder is the waste car tire powder after desulfu...

Embodiment 2

[0052] The environmentally friendly waste and old asphalt mixture regeneration agent with solubilizing effect of the present invention consists of 17% waste rubber powder, 60% oil, 8% solubilizer, 5% polyisobutylene maleic acid amide, Prepared with 3.1% hindered amine light stabilizer and 6.9% isobutyltriethoxysilane.

[0053] The oil component is composed of 60% by mass percentage of catalytic cracking oil slurry and 40% of waste epoxidized soybean oil.

[0054] The relative density of the catalytic cracking oil slurry is 1.161, and the catalytic cracking oil slurry is composed of 70% aromatics, 15% saturates, 9% colloids and 6% asphaltenes by mass percentage; It is obtained after frying for 1 hour and filtering the residue. The initial epoxy value is greater than 8%.

[0055] The mass percentage of the solubilizer is composed of 55% sodium dodecylbenzenesulfonate and 45% polyisobutenyl succinimide.

[0056] The waste rubber powder is the waste car tire powder after desulfu...

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Abstract

The invention discloses an environment-friendly waste and old asphalt mixture regenerant with a solubilizing effect and a preparation method thereof. % of solubilizer, 3% to 5% of polyisobutylene maleic acid amide, 2.3% to 3.1% of hindered amine light stabilizer and 6% to 9.5% of isobutyltriethoxysilane. The rejuvenating agent has excellent penetration performance, can fully adjust the composition and structure of activated and aged asphalt, and can greatly improve the low-temperature performance of the waste asphalt mixture to ensure its good road performance, and the preparation method is relatively simple.

Description

technical field [0001] The invention belongs to the technical field of asphalt pavement materials, and relates to an environment-friendly waste asphalt mixture regeneration agent with a solubilizing effect and a preparation method thereof. Background technique [0002] According to statistics, about 12% of the asphalt pavement in our country needs to be overhauled and maintained every year, and the waste asphalt mixture produced during this period will reach 19 million tons, and this figure will increase at a rate of 15% per year. The recycling technology of waste asphalt mixture has been rapidly developed and popularized due to its good performance and significant economic and environmental benefits. 18kg CO reduction per tonne of recycled asphalt compared to new asphalt 2 Equivalent emissions can also save at least 50% of the material cost, which shows that the waste asphalt mixture recycling technology has a significant environmental protection effect and can save huge e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L91/00C08L19/00C08L23/22C08K5/42C08K5/5419
CPCC08L95/00C08L91/00C08L2205/025C08L2205/035C08L19/003C08L23/22C08K5/42C08K5/5419Y02W30/91
Inventor 何锐郑睢宁高莉宁况栋梁鲁孝松梁映平耿九光
Owner CHANGAN UNIV
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