Polymer modified asphalt cement (PMAC)
Thermo-Guard asphalt tanks provide a better mixing, heating and storage solution for polymer modified asphalt than competitive tanks.

To achieve proper blending of polymer modified asphalt, the virgin asphalt is heated to temperatures higher than normal. So, insulation is more important than ever. And design of the mixing system is just as important.

Flow patterns in a Thermo-Guard^® vertical asphalt tank with mixer.

Our mixing system keeps the polymers in suspension to prevent them from separating from the virgin asphalt.

The number, size, pitch, location and rotational speed of the impeller blades are key factors in maintaining mixture consistency. Moreover, the baffle and piping are carefully arranged to keep material from hugging the tank wall and to minimize stagnation zones (see illustration above).

Thermo-Guard® vertical asphalt tank with handrails, caged ladder, level gauge board and mixer for polymer-modified asphalt cement.		Interior view of tank shows mixer, heating coils, baffle, float for gauge board, internal piping and manhole.

The mixer has a 7.5 horsepower motor with a totally-enclosed, fan-cooled (TEFC) housing. This housing minimizes hazards in the event any fumes escape the tank. The mixer has a turnover of 5,593 gallons per minute. Its large 3-inch mixing shaft has impellers at two levels for increased efficiency. The impellers run at 42 rpm.