ABSTRACT
Foam concretes are given their structure by using foam generators or stirring up the cement paste using foaming agents and fast rotating pug mill mixers. The paste consists of the binder, usually cement, finely grounded quartzitic sand, water and foam generating admixtures. After moulding the foam, the concrete hardens under normal atmospheric conditions. During the mechanical foaming procedure, a foam agent is added to the mortar. Numerous voids are mechanically introduced by high speed mixers. An unstable foam develops with an irregular structure and undefined void structures.
