Study on the effect and mechanism of emulsifier on the properties of modified emulsified asphalt

Three different emulsifiers AE, BE and CE were used to prepare modified emulsified bitumen by changing their dosages and SBR latex, and the emulsification effect and evaporation residue properties of the emulsion were experimentally studied. The results showed that SK-3 had good emulsification effect when the doses of AE, BE and CE reached 2.0%, 1.2% and 1.5%, respectively. The 90°C ductility index of residue showed that the effects of the three on the properties of asphalt materials were improved, maintained and reduced. The inspection of residual elastic recovery, viscosity and toughness, dynamic viscosity at 5 °C and other indicators is of great significance for the quality control of raw materials used at microsurfaces. The results show that when other indicators of the emulsion meet the requirements of the specification, the dynamic viscosity of the residue at 60°C is difficult to meet the requirements of the foreign standard "≮60 Pa·s", and it is recommended that the technical requirements such as elastic recovery, viscosity, toughness, and dynamic viscosity in China be gradually included in the relevant specifications.