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Bitumen Emulsion

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