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Asphalt modifier and its preparation process

An asphalt modifier and modification technology, which is applied in the field of asphalt, can solve the problems of poor aging resistance, poor temperature stability of asphalt pavement, and poor dispersion of modifiers, so as to improve the anti-oxidative aging performance of asphalt and improve the anti-oxidative aging of asphalt Performance, the effect of excellent high and low temperature resistance

Active Publication Date: 2022-03-01
CHINA ROAD & BRIDGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In order to speed up the construction process of traffic roads, the previous concrete road technology was gradually eliminated by asphalt pavement technology. Asphalt pavement is the most widely used high-grade road surface in road construction at present. It has the advantages of short construction period, easy maintenance and maintenance, no dust and easy cleaning At the same time, the existing asphalt pavement still has many shortcomings such as poor temperature stability, brittleness at low temperature, easy flow at high temperature, and poor aging resistance. In order to ensure the comfort and safety of traffic driving and reduce traffic noise, it is necessary to mix the Modifiers are added to the material to achieve the purpose of improving the temperature resistance and aging resistance of asphalt
[0003] Currently commonly used asphalt modifiers have the following defects: (1) poor adhesion with asphalt, prone to segregation; (2) poor dispersibility of each component of the modifier, resulting in low effective material utilization; (3) The anti-aging performance of asphalt is not significantly improved

Method used

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  • Asphalt modifier and its preparation process

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The invention provides an asphalt modifier, comprising the following raw materials in parts by weight: 20 parts of graphene, 10 parts of carbon nanotubes, 4 parts of dopamine, 15 parts of vegetable oil polyols, 30 parts of polytetrafluoroethylene fiber and 1 part stabilizer.

[0028] Wherein, the stabilizer is sulfur.

[0029] The graphene has been pretreated, specifically:

[0030] S1, disperse the graphene in the ethanol solution, control the mass concentration of the graphene to 0.3 mg / mL, and obtain a colloidal solution after ultrasonic treatment for 2 hours;

[0031] S2, add surfactant in colloidal solution, stir colloidal solution under the stirring velocity of 1000r / min and carry out foaming 40min, obtain foam suspension, wherein the weight ratio of the add-on of surfactant and graphene in colloidal solution is 0.03 :1;

[0032] S3. Freeze-drying and pulverizing the foam suspension to obtain pretreated graphene.

[0033] The surfactant in step S2 is sodium do...

Embodiment 2

[0040] The invention provides an asphalt modifier, comprising the following raw materials in parts by weight: 30 parts of graphene, 15 parts of carbon nanotubes, 8 parts of dopamine, 25 parts of vegetable oil polyols, 40 parts of polytetrafluoroethylene fiber and 3 parts stabilizer.

[0041] Wherein, the stabilizer is sulfur.

[0042] The graphene has been pretreated, specifically:

[0043] S1, disperse graphene in ethanol solution, control the mass concentration of graphene to be 0.7mg / mL, after ultrasonic treatment for 2.5h, obtain colloidal solution;

[0044]S2, add surfactant in colloidal solution, stir colloidal solution under the stirring speed of 1500r / min and carry out foaming 60min, obtain foam suspension, wherein the weight ratio of the add-on of surfactant and graphene in colloidal solution is 0.1 :1;

[0045] S3. Freeze-drying and pulverizing the foam suspension to obtain pretreated graphene.

[0046] The surfactant in step S2 is sodium dodecylsulfonate.

[00...

Embodiment 3

[0053] The invention provides an asphalt modifier, comprising the following raw materials in parts by weight: 25 parts of graphene, 13 parts of carbon nanotubes, 6 parts of dopamine, 20 parts of vegetable oil polyols, and 35 parts of polytetrafluoroethylene fiber and 2 parts stabilizer.

[0054] Wherein, the stabilizer is sulfur.

[0055] The graphene has been pretreated, specifically:

[0056] S1, disperse the graphene in the ethanol solution, control the mass concentration of the graphene to 0.5 mg / mL, and obtain a colloidal solution after ultrasonic treatment for 2.3 hours;

[0057] S2, add surfactant in colloidal solution, stir colloidal solution under the stirring speed of 1300r / min and carry out foaming 50min, obtain foam suspension, wherein the weight ratio of the add-on of surfactant and graphene in colloidal solution is 0.07 :1;

[0058] S3. Freeze-drying and pulverizing the foam suspension to obtain pretreated graphene.

[0059] The surfactant in step S2 is sodiu...

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Abstract

The invention discloses an asphalt modifier, comprising the following raw materials in parts by weight: 20-30 parts of graphene, 10-15 parts of carbon nanotubes, 4-8 parts of dopamine, and 15-25 parts of vegetable oil multicomponent Alcohol, 30-40 parts of polytetrafluoroethylene fibers and 1-3 parts of stabilizer. The present invention has good compatibility with asphalt, improves adhesion with asphalt, and avoids the occurrence of segregation; using vegetable oil polyol as solvent can improve the dispersibility of other components and improve the utilization rate of effective substances; introduce dopamine , Graphene has the effect of obviously improving the anti-oxidative aging performance of asphalt, thereby achieving the purpose of improving the durability of asphalt.

Description

technical field [0001] The invention relates to the field of asphalt technology, more specifically, the invention relates to an asphalt modifier and a preparation process thereof. Background technique [0002] In order to speed up the construction process of traffic roads, the previous concrete road technology was gradually eliminated by asphalt pavement technology. Asphalt pavement is the most widely used high-grade road surface in road construction at present. It has the advantages of short construction period, easy maintenance and maintenance, no dust and easy cleaning At the same time, the existing asphalt pavement still has many shortcomings such as poor temperature stability, brittleness at low temperature, easy flow at high temperature, and poor aging resistance. In order to ensure the comfort and safety of traffic driving and reduce traffic noise, it is necessary to mix the Modifiers are added to the material to achieve the purpose of improving the temperature resist...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L27/18C08L91/00C08K13/06C08K9/04C08K3/04C08K3/06D06M10/02
CPCC08L95/00D06M10/025C08L2205/16C08L2205/03C08L2205/08C08K2201/011C08L27/18C08L91/00C08K13/06C08K9/04C08K3/042C08K3/041C08K3/06
Inventor 王随原曾峰蔡文浩程昊
Owner CHINA ROAD & BRIDGE
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