Bitumen emulsions are basically an O/W – Oil on Water solution – A dispersion of bitumen particles on water phase, stabilized with the addition of surfactants – Surface active agents – or most commonly known as emulsifiers. They are primarily used for tack coats for use in between hot mix asphalt layers and prime coats for thin hot mix surfacing layers or a chip seal pavements, other cold mixed asphalt and maintenance binder .
Bitumen emulsions are divided into three categories:
* Anionic with negatively charged globules
* Cationic with positively charged globules
* Non-ionic with neutral globules.
Base on the time of setting after spraying, Bitumen emulsions classification as Quick Set (QS), Rapild set (RS), Medium set (MS) and Slow set(SS)
Types Of Grade