Fireproof construction element for constructing shafts e.g. supply and drainage pipes, chimney casings and building venting and aeration shafts

摘要

A fireproof construction element, comprises a pipe of concrete or cement-bonded material containing foamed glass aggregate. Preferred Features: The material comprises up to 20 vol.% expanded polystyrene, 20-60 vol.% foamed glass, about 16 vol.% calcium aluminate cement and balance water and optionally further aggregates and small additions of fluidizer and/or foam former.