Chemical corrosion phenomena of roofing tiles

Abstract The deterioration phenomena of roof tiles in model systems, formed from clay minerals and Ca-carbonate component, have been investigated. The systems after a specific thermal treatment were exposed to real atmospheric conditions, i.e. to attack of sulphurous acidic rains. The dual action, of SO 2 and atmospheric humidity, on roofing tiles, supporting the destruction phenomena of samples, elucidated the formation of specific phases: gel of calcium silicate hydrates and crystals of aluminate hydrates, cancrinite, scawtite and zeolites.