Depending on the type of emulsified asphalt plant and emulsifier, there are differences in the preparation of the emulsifier aqueous solution (soap solution). For automatic continuous emulsified asphalt production equipment, the various components of the soap liquid (water, acid, emulsifier, etc.) are automatically completed by the production equipment set up procedures, as long as the supply of each material can be guaranteed; for half Continuous or intermittent production equipment, you need to manually configure the soap in accordance with the requirements of the formula. Some emulsifier aqueous solution need to add acid to adjust the PH value, and some (such as quaternary ammonium salts) are not required. Some emulsifiers that are solid at room temperature also require that they be first heated and melted before being dispensed.