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 SO2 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. © 1997 Elsevier Science Limited and Techna S.r.l.