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Method for preparing and recovering recoverable epoxy asphalt

A technology of epoxy asphalt and recycling method, which is applied in building components, building insulation materials, buildings, etc., can solve the problems of high performance added value and difficult recycling of resin bonding materials, and achieve the improvement of temperature sensitivity and softening point. Effect

Active Publication Date: 2021-12-17
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the currently widely used epoxy asphalt is irreversible after the resin phase is cured, so it is difficult to effectively recycle, or the epoxy asphalt mixture is used as aggregate after milling, and it is difficult to realize the high-performance added value of the resin bonded material. use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0018] A method for preparing recyclable epoxy asphalt, comprising the following steps:

[0019] Step 1: Take 75-90 parts by mass of base asphalt and heat it to a fluid state, add 50-70 parts of maleic anhydride and 0.1-0.5 parts of 2,4,7,9-tetramethyl-5-decyne- 4,7-diol, after stirring evenly, react with base asphalt at 110-150°C with a conversion rate of 30% of maleic anhydride to obtain component A, in which maleic anhydride is used as a curing agent, 2,4 , 7,9-tetramethyl-5-decyne-4,7-diol as a defoamer;

[0020] Step 2: Mix 90 to 110 parts of epoxy oligomer containing furan bifunctional group with 2 to 10 parts of N,N-dimethylbenzylamine according to the parts by mass to obtain component B, in which the ring containing furan bifunctional group Oxygen oligomers should be low-viscosity epoxy oligomers, the viscosity range should be controlled at 5-500mPa·s, and N,N-dimethylbenzylamine is used as an accelerator;

[0021] Step 3: Take 140-160 parts of the A component and 90...

Embodiment 1

[0031] Embodiment 1 (preparation method)

[0032] Step 1: According to the mass parts, take 75 parts of 90# base asphalt and heat it in an oven at 150°C for 2 hours to obtain a fluid base asphalt, add 50 parts of maleic anhydride and 0.1 part of 2,4,7,9-tetramethyl -5-decyne-4,7-diol, stirred at a temperature of 120°C and a stirring speed of 3000r / min for 3min to make it evenly stirred, and then at 110°C at a conversion rate of 30% of maleic anhydride and Base asphalt reaction to obtain A component;

[0033] Step 2: Mix 90 parts of furan-containing difunctional epoxy oligomer with 2 parts of N,N-dimethylbenzylamine according to the parts by mass to obtain component B;

[0034] Step 3: Take 140 parts of the A component and 90 parts of the B component according to the parts by mass;

[0035] Step 4: Preheat component B in an oven at 60°C. When component A cools down to 60°C, mix component A and component B, and stir at a temperature of 60°C and a stirring speed of 3000r / min 1...

Embodiment 2

[0037] Embodiment 2 (preparation method)

[0038] Step 1: According to the mass parts, take 80 parts of 90# base asphalt and heat it in an oven at 150°C for 2 hours to obtain a fluid base asphalt, add 65 parts of maleic anhydride and 0.2 parts of 2,4,7,9-tetramethyl -5-decyne-4,7-diol, stirred at a temperature of 120°C and a stirring speed of 3000r / min for 3 minutes to make it evenly stirred, and then at 120°C with a conversion rate of 30% of maleic anhydride as the target and Base asphalt reaction to obtain A component;

[0039] Step 2: Mix 100 parts of furan-containing difunctional epoxy oligomer with 5 parts of N,N-dimethylbenzylamine according to the parts by mass to obtain component B;

[0040] Step 3: Take 145.5 parts of the A component and 105 parts of the B component according to the parts by mass;

[0041] Step 4: Preheat component B in an oven at 70°C. When component A cools down to 70°C, mix component A and component B, and stir at a temperature of 70°C and a stir...

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Abstract

The invention discloses a method for preparing and recovering recoverable epoxy asphalt, and relates to a method for preparing and recovering epoxy asphalt. The method comprises the steps: heating 75-90 parts of matrix asphalt to a flowing state, adding 50-70 parts of maleic anhydride and 0.1-0.5 part of 2,4,7,9-tetramethyl-5-decyne-4,7-diol, and reacting to obtain a component A; mixing 90-110 parts of a furan-containing bifunctional epoxy oligomer with 2-10 parts of N,N-dimethyl benzylamine to obtain a component B; taking 140-160 parts of the component A and 90-120 parts of the component B; preheating the component B at the temperature of 60-80 DEG C, and uniformly stirring when the component A is cooled to the same temperature; curing a blend to obtain recoverable epoxy asphalt; heating the epoxy asphalt at the end of the use period to a flowing state at the temperature of 120 DEG C; adding a regenerant and fully stirring; and re-curing at the temperature of 70 DEG C for 24 hours to obtain the recoverable epoxy asphalt. The recoverable epoxy asphalt based on a temperature regulation and control mechanism is prepared based on a dynamic covalent bond reversibility principle.

Description

technical field [0001] The invention relates to a preparation and recovery method of epoxy asphalt, in particular to a preparation and recovery method of recyclable epoxy asphalt, which belongs to the technical field of road and bridge engineering. Background technique [0002] With the development of science, technology and economy, my country's road and bridge construction has entered the world's first echelon. The completion of a series of long-span bridges such as the Hong Kong-Zhuhai-Macao Bridge, the China-North Korea Yalu River Bridge, and the Second Nanjing Yangtze River Bridge has greatly enhanced social and economic vitality and promoted the circulation of innovative elements. [0003] Due to its excellent strength and mechanical properties, epoxy asphalt is widely used in bridge deck pavement including the above-mentioned long-span bridges. In addition, it is also used in noise reduction pavement in tunnels, airport overlays, pavement wear layers, and urban roads....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L63/00C08G59/42
CPCC08L95/00C08G59/4207C08L63/00
Inventor 易军艳周雯怡裴忠实冯德成
Owner HARBIN INST OF TECH
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