Cold crack pouring asphalt emulsion and preparation method thereof

The present invention discloses one kind of cold crack pouring asphalt emulsion and its preparation process. The cold crack pouring asphalt emulsion is prepared with asphalt 50-60 weight portions, solvent oil 3-5 weight portions, vegetable oil 3-5 weight portions, anionic or cationic asphalt emulsifier 1-2 weight portions, ethylene glycol or glycerin 8-10 weight portions, and water 20-30 weight portions. The preparation process includes the following steps: 1. heating asphalt to 110-120 deg.c; 2. mixing vegetable oil and solvent oil, and adding the mixture oil into the hot asphalt through stirring; 3. adding ethylene glycol or glycerin into water through stirring and heating to 55-60 deg.c; 4. adding the asphalt emulsifier into water at 55-60 deg.c through stirring to form emulsion; and 5. mixing the emulsion and asphalt mixture. The asphalt emulsion is poured to crack in highway, and has lowered highway maintenance cost.