Emulsion is made by combining these materials and passing them through a mill.
Emulsions are liquid at ambient temperatures. They can be applied at cooler temperatures than asphalt cements and cutback asphalts.
There are two major categories of emulsion: cationic and anionic. Anionic emulsions have negatively charged asphalt droplets and cationic emulsions have positively charged asphalt droplets.