The principal aim of the present work is to analyse the alteration products due to reactions between atmospheric components and one of the most common limestone utilised to build the Tower of London, in order to identify the pollutant sources and the damage mechanisms affecting the masonry. The samples were characterized using classical analytical methodologies associated with new methodologies specifically set up during the CARAMEL Project to obtain quantitative data on crust compositions. Gypsum is the main constituent of the damage layers, originating from the sulphation process that occurs as a result of SO2 deposition. Moreover, black crusts reveal different physical and chemical features from those of thin grey-brownish damage layers, a finding that reflects the changes in the pollution sources contributing to crust formation.
The Tower of London: a case study on stone damage in an urban area
GHEDINI, NADIA;
2004
Abstract
The principal aim of the present work is to analyse the alteration products due to reactions between atmospheric components and one of the most common limestone utilised to build the Tower of London, in order to identify the pollutant sources and the damage mechanisms affecting the masonry. The samples were characterized using classical analytical methodologies associated with new methodologies specifically set up during the CARAMEL Project to obtain quantitative data on crust compositions. Gypsum is the main constituent of the damage layers, originating from the sulphation process that occurs as a result of SO2 deposition. Moreover, black crusts reveal different physical and chemical features from those of thin grey-brownish damage layers, a finding that reflects the changes in the pollution sources contributing to crust formation.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
