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Nanometer modified asphalt micro-emulsion and preparation method thereof

A technology of modified asphalt and microemulsion, applied in building components, building insulation materials, buildings, etc., can solve the problems of storage stability, poor temperature resistance stability, thermodynamic instability, delamination, etc., and achieve easy operation and good storage Stability and high efficiency

Inactive Publication Date: 2012-07-18
WUHAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, traditional emulsified asphalt is a thermodynamically unstable system. There is a tendency of flocculation, coagulation, and precipitation between asphalt particles. The storage stability and temperature resistance stability are poor. Long-term storage will cause stratification, resulting in failure

Method used

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  • Nanometer modified asphalt micro-emulsion and preparation method thereof
  • Nanometer modified asphalt micro-emulsion and preparation method thereof
  • Nanometer modified asphalt micro-emulsion and preparation method thereof

Examples

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preparation example Construction

[0025] A preparation method of nano-scale modified asphalt microemulsion is carried out as follows,

[0026] A. Mix 1%~5% anionic emulsifier and 1%~5% nonionic emulsifier to form a synergistic effect of emulsifier compounding. At the same time, add 40%~70% deionized water, and then add 0.25%~2.5% It has a co-emulsifier that can further reduce the interfacial tension, and is heated to 40-65 ° C, and prepared into a soap liquid under the action of stirring and shearing force. Wherein, when forming uniform transparent soap liquid, stirring and shearing stop, and stirring shear speed is advisable with soap liquid not splashing out;

[0027] B Heat 15%-45% SBS modified asphalt to 110-165°C;

[0028] C. Transport the soap solution prepared in step A and the SBS modified asphalt after heat treatment in step B to the colloid mill for pre-emulsification for 10-30 minutes to obtain a pre-emulsion with certain stability. The colloid mill speed is 8000r / min~ 11000r / min, the control pres...

Embodiment 1

[0032] Adopt 3g sodium dodecylsulfonate anionic emulsifier and 1g nonylphenol polyoxyethylene ether nonionic emulsifier compound, be dissolved in 70g deionized water together, then add 2g n-butanol, with stirring and shearing Method Prepare soap liquid and heat it to 65°C; heat 30g of SBS modified asphalt to 120°C; send the soap liquid and heated SBS modified asphalt to the colloid mill at the same time for pre-emulsification for 10min. The speed of the colloid mill is 10000r / min, and the control pressure of the colloid mill is 0.3MPa. When the temperature of the pre-emulsion drops below 70°C, the pre-emulsion is further emulsified by ultrasonic equipment for 10 minutes, wherein the ultrasonic power is adjusted to 500w, and the frequency is 9 ×10 4 Hz. At the same time, 2 g of n-butanol was added and ultrasonic emulsification was continued for 15 minutes to obtain a nanoscale modified asphalt microemulsion.

Embodiment 2

[0034] Adopt 5g sodium dodecylsulfonate anionic emulsifier and 2g nonylphenol polyoxyethylene ether nonionic emulsifier compound, be dissolved in 150g deionized water together, then add 4g n-butanol, with stirring and shearing Method Prepare soap liquid and heat it to 65°C; heat 50g of SBS modified asphalt to 120°C; send the soap liquid and heated SBS modified asphalt to the colloid mill for pre-emulsification for 10min at the same time. The speed of the colloid mill is 10000r / min, and the control pressure of the colloid mill is 0.3MPa. When the temperature of the pre-emulsion drops below 70°C, the pre-emulsion is further emulsified by ultrasonic equipment for 10 minutes, wherein the ultrasonic power is adjusted to 500w, and the frequency is 9 ×10 4 Hz. At the same time, 2 g of n-butanol was added and ultrasonic emulsification was continued for 15 minutes to obtain a nanoscale modified asphalt microemulsion.

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Abstract

The invention relates to nanometer modified asphalt micro-emulsion and a preparation method thereof, belonging to the technical field of high polymer materials. The preparation method of the nanometer modified asphalt micro-emulsion is characterized by comprising the step of preparing the nanometer emulsified SBS (Styrene-Butadiene-Styrene) modified asphalt with uniform particle size distribution and size less than 150 nm by utilizing actions like dispersion and emulsification of ultrasonic waves in the presence of an anionic emulsifier, a non-ionic emulsifier and a coemulsifier. The nanometer modified asphalt micro-emulsion has the advantages of small particle size and uniform distribution of the particles, difficult agglomeration of particles and good long-term storage stability, and overcomes the disadvantage of insufficient long-term storage stability of the traditional emulsified asphalt. The preparation method disclosed by the invention has the advantages of high efficiency, convenience in operation and wide application range. The asphalt particles are dispersed uniformly as well as small in particle size and have good stability. In addition, due to the special particle effect of the nanometer particles, agglomeration and coagulation of the asphalt particles can be prevented efficiently, and adhesive attraction of the asphalt emulsion particles and non-asphalt substances can be developed better.

Description

technical field [0001] The invention relates to a nano-scale modified asphalt microemulsion and a preparation method thereof, belonging to the technical field of polymer materials. Background technique [0002] The permeable layer located on the surface of the asphalt pavement base layer plays the role of consolidation, stability, waterproof, and connection of various road structural layers, which is crucial to the quality and life of the pavement. The oil penetration depth of the penetrating layer determines whether the asphalt surface layer can be well combined with the non-asphalt material base. Emulsified asphalt is a kind of penetrating oil widely used at present. During construction, we need emulsified asphalt to break the emulsion and play a role in bonding stone materials, but in production, storage, and transportation projects, we hope that the emulsified asphalt can maintain a uniform and stable state. However, traditional emulsified asphalt is a thermodynamicall...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L53/02C08J3/03
Inventor 刘杰胜董莪张传成陆海军程伟余俊孙超
Owner WUHAN POLYTECHNIC UNIVERSITY
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