Introduction
The Polysteel wall system is based on waffle grid insulating concrete forms (ICFs) produced by American Polysteel Forms. Thickness of these forms is 9-1/4-in.
During February 1996, the Oak Ridge National
Laboratory BTC tested Polysteel walls in the guarded hot box under
the steady state conditions. Exterior surface of the wall was finished
with ½-in. thick layer of stucco. On the interior surface
of tested wall ½-in. thick gypsum boards were installed.
Reinforced high density concrete was poured
into the wall forms. Polysteel wall forms are made of complex EPS
foam shells with a density of app. 1.6 lb/ft³. The steel ties hold
the Polysteel form together. They allow free and relatively uniform
flow of concrete throughout the inside of the forms. Also they help
in correct placement of horizontal rebar according to engineering
specifications.
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