Aqueous bitumen emulsion is a finely dispersed liquid material that is dark brown in color. The aqueous bitumen emulsion is produced in special plants during the bitumen phase by grinding in an an aqueous medium with the optional addition of an emulsifier or surfactant.
Preparation of aqueous bituminous emulsions is held in special devices in a manner differing from the emulsification of starting materials and in the quality of the produced substances. This process originated from primitive grain grinders and from millstones and wind mills and evolved into the mixer and grinder and later into high speed dispersing and homogenizing devices.
Bitumen emulsions for road works first appeared in the 1920s. The first patents for emulsified bitumen in water belong to a French company. Gradual improvement of equipment increased the quality of the produced material. During the second half of the twentieth century, bitumen emulsion became actively used during road construction and gradually replaced organic binders and eliminated the problems associated with the use of hot mastic products. Economical, safe and environmentally pure material was a leading requirement in the road construction industry. Several European countries banned the use of all organic solutions, paying tribute to the water based, asphalt binder.
There are several different types of emulsification equipment, but the most popular today are devices for liquid emulsions. Typically, such methods are widely used in the emulsification of dispersants, ultrasonic homogenizers and colloid mills. These technologies provide for the ultrafine grinding of organic and inorganic materials on the nanometr