Materiales de Construcción, Vol 54, No 273 (2004)

Reactivity of laser-cleaned stones to a SO2 ageing test


https://doi.org/10.3989/mc.2004.v54.i273.222

F.J. Alonso
Dpto. de Geología (Área de Petrología y Geoquímica), Universidad de Oviedo, Spain

R.M. Esbert
Dpto. de Geología (Área de Petrología y Geoquímica), Universidad de Oviedo, Spain

J. Ordaz
Dpto. de Geología (Área de Petrología y Geoquímica), Universidad de Oviedo, Spain

C.M. GROSSI
Dpto. de Geología (Área de Petrología y Geoquímica), Universidad de Oviedo, Spain

Abstract


In order to study the reaction or susceptibility of Nd:YAG laser cleaned stones to polluted atmospheres, several types of stone, both cemented (limestone) and crystalline (marble, granite), were exposed to an atmosphere having simulated SO2 pollution. The subsequent effects on the specimens were assessed for variations in surface morphology, weight and colour The main conclusion is that the application of laser irradiation to the selected stone specimens does not significantly influence their reaction to sulphur dioxide

Keywords


stone conservation; Nd:YAG laser cleaning; SO2 ageing test; surface effects

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