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Reaction type asphalt regenerating agent and preparation method thereof

An asphalt rejuvenating agent and reaction-type technology, which is applied in building components, building insulation materials, buildings, etc., can solve the problems of poor road performance of recycled asphalt mixture, short service life of recycled asphalt pavement, and unfavorable long-term storage of polymers. , to achieve the effect of low cost of use, extended service life, and good ductility recovery effect.

Active Publication Date: 2016-01-06
HAISO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above method is only simple compounding of multiple components, and the existing problems are: the viscosity of the regenerant is too high and it is inconvenient to use; the addition of polymers is not conducive to long-term storage, and the ductility recovery effect is poor; at the same time, the pavement performance of the regenerated asphalt mixture is poor. Recycled asphalt pavement has a short service life

Method used

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  • Reaction type asphalt regenerating agent and preparation method thereof
  • Reaction type asphalt regenerating agent and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0027] The preparation of polyurethane prepolymer: with 10 parts of polyoxypropylene polyols (with propylene glycol as initiator, potassium hydroxide is catalyzer, molecular weight is 2000, and hydroxyl value is 56mgKOH / g, water content is 0.06wt%), at temperature 110~120℃, vacuum degree -0.08~-0.1MPa, after vacuum dehydration reaction for 2 hours, start to cool down, keep vacuuming during the cooling process, when the system temperature drops to 70~80℃, continue to add 3.22 parts of MDI-50 to In the reaction container, react for 2-4 hours, stop the reaction to obtain the polyurethane prepolymer.

[0028] Add 70 parts of 160# petroleum asphalt, 12 parts of maleic anhydride and 0.01 part of aluminum trichloride into a three-necked flask with a stirring rod and a thermometer, raise the temperature to 160°C for addition reaction for 12 hours, then lower the system temperature to 80°C, Add 13 parts of the polyurethane prepolymer prepared above, 0.1 part of the chain extender 1,4-b...

Embodiment 2

[0030] The preparation of polyurethane prepolymer: with 12 parts of polyoxypropylene polyols (with propylene glycol as starter, with dimethyl carbonate as catalyst, molecular weight is 3000, hydroxyl value is 38mgKOH / g, water content is 0.05wt%), After the dehydration reaction at a temperature of 110-120°C and a vacuum of -0.08--0.1MPa for 2 hours, the temperature began to drop, and the vacuum state was maintained during the cooling process. When the system temperature dropped to 70-80°C, continue to add 4.69 parts of MDI-100 In the reaction container, react for 2 to 4 hours, and stop the reaction to obtain the polyurethane prepolymer.

[0031]Add 45 parts of 110# petroleum asphalt, 21 parts of 90# petroleum asphalt, 15 parts of maleic anhydride and 0.02 part of zinc chloride into a three-necked flask with a stirring rod and a thermometer, raise the temperature to 170 ° C for 10 hours of addition reaction, and then lower When the temperature of the system reaches 70°C, add 15 ...

Embodiment 3

[0033] The preparation of polyurethane prepolymer: with 15 parts of polyoxypropylene polyols (with propylene glycol as initiator, potassium hydroxide is catalyzer, molecular weight is 1000, and hydroxyl value is 112mgKOH / g, water content is 0.03wt%), at temperature 110~120℃, vacuum degree -0.08~-0.1MPa, after dehydration reaction for 2 hours, start to cool down, keep vacuuming during the cooling process, when the system temperature drops to 70~80℃, continue to add 3 parts of MDI-100 and 1 Put one part of MDI-50 in the reaction container, react for 2-4 hours, and stop the reaction to obtain the polyurethane prepolymer.

[0034] Add 74.3 parts of 130# petroleum asphalt, 10 parts of maleic anhydride and 0.04 parts of boron trifluoride into a three-necked flask with a stirring rod and a thermometer, raise the temperature to 180°C for addition reaction for 8 hours, then lower the system temperature to 80°C, Add 10 parts of the polyurethane prepolymer prepared above, 0.1 part of the...

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Abstract

The invention relates to a reaction type asphalt regenerating agent and a preparation method thereof. The preparation method comprises the following steps: adding petroleum asphalt, maleic anhydride and a Diels-Alder addition reaction catalyst into a reaction container, heating to 160-180 DEG C to carry out addition reaction for 8-12 hours, cooling a system to 70-80 DEG C, adding a polyurethane prepolymer and a chain extender, and continuing the thermal insulation reaction for 8-10 hours, then adding a fatty acid amide serving as a viscosity reducer, nonylphenol polyoxyethylene ether serving as a penetrating agent and an anti-aging agent, and mechanically stirring at 80-90 DEG C for 2-4 hours until the mixture is uniformly stirred, so as to obtain the reaction type asphalt regenerating agent. The reaction type asphalt regenerating agent provided by the invention is relatively low in viscosity, does not need to be heated in use, is convenient to construct, has a good restoration effect to the ductility of aged asphalt and can meet the performance requirement of unused asphalt; and furthermore, the use ratio of regenerated materials can be increased, and the water damage resistance of a prepared regenerated asphalt mixture is superior to that of a general regenerating agent.

Description

technical field [0001] The invention belongs to the technical field of engineering materials, and relates to a reactive asphalt regeneration agent and a preparation method thereof. Background technique [0002] With the development of the national economy, the number of automobiles in my country continues to increase, resulting in a rapid increase in the load of public transportation. Deformation, rutting, wear, cracks and other diseases have appeared successively on the asphalt pavement of expressway. It is imminent to carry out maintenance and reconstruction for the aging and seriously deteriorating road surface. At present, the method of directly digging and laying new asphalt pavement is usually adopted. This method brings a huge amount of asphalt mixture waste, which has a negative impact on the ecological environment. According to relevant data, according to the design life of the asphalt pavement, 12% of the asphalt pavement needs to be repaired in the fifth year fr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L51/00C08L75/04C08L95/00C08K5/20C08K5/134C08K5/524C08F289/00C08G18/48
Inventor 赵帆段冲王友奎詹洪
Owner HAISO TECH
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