The surface tension of asphalt and water varies greatly, and asphalt and water will not mix at room temperature or high temperatures. However, when the emulsified asphalt is subjected to high-speed mechanical centrifugation, shearing, and impact, it forms particles with a size of 0.1-5 microns and disperses them into a water medium containing a surfactant (emulsifier stabilizer). Because the emulsifier adsorbs on the surface of the emulsified asphalt particles, it reduces the interfacial tension between water and asphalt, allowing the asphalt particles to be dispersed in the surfactant-containing water medium (forming a stable dispersion in the water). Emulsified asphalt equipment produces an oil-in-water emulsion. The dispersion is brown, with asphalt as the dispersed phase and water as the continuous phase, and has good fluidity at room temperature.

Precautions for Using Emulsified Asphalt Equipment
1. Before spraying, the equipment must be checked for correct valve position. The hot asphalt added to the emulsified asphalt equipment must be operated within the temperature range of 160-180°C. The heating device can be used for long-distance transportation or long-term operation, but it cannot be used as an oil melting furnace.
2. When using a burner to heat asphalt in an emulsified asphalt plant, the asphalt level must exceed the upper surface of the combustion chamber, otherwise the combustion chamber will burn out. The emulsified asphalt plant must not be overfilled. The oil filler cap must be tightened to prevent asphalt spillage during transport.
4. When using the front control console, the switch should be set to front control. In this case, the rear control console can only control the nozzle raising and lowering.