K. Takamura, A. James, in Advances in Asphalt Materials, 2015 Introduction. Asphalt emulsions are watercontinuous dispersions of fine asphalt droplets, typically 1–10 μm in diameter, manufactured with the aid of a colloid mill. The emulsions may contain between 40% and 80% asphalt by weight. The emulsions have significantly lower viscosity than asphalt itself, and so can be applied at ...