Building elements contg metamorphic silicous material - with foamed cell structure

摘要

The building materials of metamorphic silicate rock and minerals synthetic or natural, iso- or allo-chemical metamorphoses which are plastic and workable at firing temps of 650-900 degrees C as in parent patent, are fired in the form of briquettes foamed with the aid of a foaming agent and hardened in a steam pressure vessel at 140-220 degrees C. The basic materials are pref. silica contg. slags, flyash or other technical and synthetic silicates. Closed cell structure which has practically no capillarity.