[Glen]

hat role does the colloid mill play in determining asphalt emulsion particle size and stability?

[Jason]

The colloid mill is the main “particle size control” device in an emulsion plant. Rotor speed, stator design, mill gap, and feed rate set the shear energy that breaks asphalt into droplets and determines the particle size distribution. Smaller, tighter distributions usually improve storage stability and spray uniformity, but excessive shear can overheat the emulsion, damage polymer modified systems, or destabilize the surfactant film. Stable operation requires consistent asphalt temperature, water phase pH, and flow ratio so the mill produces the same droplet structure batch after batch.

[Author]

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