High-dosage water-based SBS modified emulsified asphalt and preparation method thereof

The invention aims to provide high-dosage water-based SBS (styrene-butadiene-styrene) modified emulsified asphalt and a preparation method thereof, and belongs to the technical field of modified emulsified asphalts.The modified emulsified asphalt is prepared from 45-65 parts of matrix asphalt, 10-40 parts of water-based SBS latex and 45-55 parts of water, the additive comprises, by weight, 0.5-2 parts of sodium dodecyl sulfate, 0.5-2 parts of hexadecyl trimethyl ammonium bromide, 0.5-2 parts of nonylphenol polyoxyethylene ether, 0.5-2 parts of anhydrous calcium chloride and 0.5-2 parts of polyvinyl alcohol. The water-based SBS latex is prepared from 50 to 60 parts of SBS, 30 to 60 parts of ethyl acetate, 10 to 20 parts of normal hexane, 50 to 100 parts of water, 0.5 to 2 parts of hexadecyl trimethyl ammonium bromide, 0.5 to 2 parts of nonylphenol polyoxyethylene ether, 0.5 to 2 parts of anhydrous calcium chloride and 0.5 to 2 parts of polyvinyl alcohol. According to the invention, the problems of poor storage