| abstract |
The invention relates to a preparation method of emulsified modified asphalt based on a zwitterionic Gemini emulsifier, which comprises the following steps: firstly, mixing and stirring a zwitterionic Gemini emulsifier, an antifreeze, a thickening agent and water uniformly, and heating to 40-65 ℃ to obtain a soap solution; heating the modified asphalt to 125-160 ℃ to obtain softened asphalt; and (2) simultaneously and respectively conveying the soap solution and the softened asphalt into a colloid mill, uniformly dispersing and grinding the soap solution and the softened asphalt by the colloid mill to form an oil-in-water type emulsion, taking the emulsion out of the system when the temperature of the emulsion is reduced to below 60 ℃, adding alumina sol into the system, and uniformly stirring the mixture to obtain the amphoteric ion type Gemini emulsifier-based emulsified modified asphalt. The invention synthesizes the zwitterionic Gemini emulsifier with a special structure, which has high emulsification effect, anti-settling effect and high wettability on asphalt, and the emulsified modified asphalt has the advantages of good permeability and high stability. |