Emulsion bitumen is a mixture of modified microscopic particulates and bitumen by the mechanical energy resulted from a colloid mill in water phase and using the emulsifier materials as a superficial activator. These materials surround the bitumen particulates and prevent them from connecting together and bitumen clot. The quality of emulsion bitumen depends on agents sort as chemical properties of the bitumen used, type of the emulsifier, other chemical material used in product formulation and its distribution method.
When emulsion bitumen used, because of the temperature difference between spread surface and emulsion bitumen, the disintegration occurs and water emulsion separates and evaporates, and ultimately, emulsifier residues with bitumen at the road surface.
Types of Emulsion Bitumen:
Emulsions mainly divide into three groups:
The first and second types are mostly used in road construction industries. The Cationic type is mostly used due to its diversity types of materials in road construction industries. The cationic emulsion bitumen according to their refraction speed and its application type is divided into three categories:
- Emulsion bitumen CRS
- Emulsion bitumen CMS
- Emulsion bitumen CSS
Now the first one has the most common usage in country.
Thin coating; removing spots; sealing lined with sand; slurry sealing; no aggregate slurry sealing; very thin protective asphalt.