Emulsified SBS modified asphalt and reparation method thereof, waterproof coating and reparation method thereof

The invention discloses emulsified SBS modified asphalt and a reparation method thereof, a waterproof coating and a reparation method thereof. The emulsified SBS modified asphalt is prepared from, by mass, 80-110 parts of matrix asphalt, 2-12 parts of SBS, 0-6 parts of stabilizer, 0-4 parts of sodium hydroxide, 1-5 parts of anionic emulsifier, 0-5 parts of non-ionic emulsifier and 45-95 parts of water. According to the emulsified SBS modified asphalt and the reparation method thereof, the waterproof coating and the reparation method thereof, the SBS serves as a modifying agent, a continuous island structure is formed in matrix asphalt particles, the mechanical property is improved, meanwhile styrene and butadiene chain segments are introduced into the SBS, the compatibility between the emulsified SBS modified asphalt and polymer emulsion in the waterproof coating is improved, and the storage stability of the obtained waterproof asphalt coating can be improved; when JC/T408-2005 'Emulsified Asphalt Waterproof Coating is met while the tensile strength reaches over 0.6MPa, the content of polymer emulsion in the waterproof coating is lowered, and the cost is lowered.