The available scenarios of multi-pollutants trends in Europe indicate a shift in modern urban atmospheres from and SO2 dominated situation to a multi-pollutant situation, linked to the driven role played by traffic in determining the overall pollution in urban centres. In view of the proven overwhelming influence of mobile combustion sources in determining the future urban atmosphere, “modern’’ soiling on built heritage will be likely to contain primarily organic carbon (OC). This will imply a change in composition of damage layers, which will presumably assume a yellow-brown coloration. The EC TeACH project (Technologies and tools to prioritize assessment and diagnosis of air pollution impact on immovable and movable cultural heritage) sets out to understand the different types of damage on cultural heritage that can be expected in the future, due to changes in pollutants, both in terms of typology and concentration. To accomplish this goal, from the technological point of view the project aims to develop a non invasive device for the continuous monitoring of the damage caused on monuments located outdoor by changing pollution impact, based on the change of colour of the architectural surface. A prototype is currently under testing at 5 monuments located in urban sites in Europe and one in the Mediterranean area, characterized by different environmental and climate conditions: Cologne Cathedral (Germany), S. Maria del Fiore Cathedral in Florence (Italy), the National Gallery in Oslo (Norway), the Arriaga Theatre in Bilbao (Spain), the National Museum in Cracow (Poland), the historic walls of Salè (Morocco). Colorimetric analyses directly at the building surface for blackening/colour change characterisation using a portable spectrophotometer. Results achieved within this still running project on the composition of damage layers will be presented and discussed. Elaboration of carbon fractions data will be liked in particular to colorimetric parameters (L*a*b*), with the aim of exploring the application of monitoring of color change of architectural surfaces as potential strategy for preventive conservation.

Monitoring of color change at building surfaces: potentialities for evaluating pollution impact on cultural heritage

GHEDINI, NADIA;SABBIONI, CRISTINA
2011

Abstract

The available scenarios of multi-pollutants trends in Europe indicate a shift in modern urban atmospheres from and SO2 dominated situation to a multi-pollutant situation, linked to the driven role played by traffic in determining the overall pollution in urban centres. In view of the proven overwhelming influence of mobile combustion sources in determining the future urban atmosphere, “modern’’ soiling on built heritage will be likely to contain primarily organic carbon (OC). This will imply a change in composition of damage layers, which will presumably assume a yellow-brown coloration. The EC TeACH project (Technologies and tools to prioritize assessment and diagnosis of air pollution impact on immovable and movable cultural heritage) sets out to understand the different types of damage on cultural heritage that can be expected in the future, due to changes in pollutants, both in terms of typology and concentration. To accomplish this goal, from the technological point of view the project aims to develop a non invasive device for the continuous monitoring of the damage caused on monuments located outdoor by changing pollution impact, based on the change of colour of the architectural surface. A prototype is currently under testing at 5 monuments located in urban sites in Europe and one in the Mediterranean area, characterized by different environmental and climate conditions: Cologne Cathedral (Germany), S. Maria del Fiore Cathedral in Florence (Italy), the National Gallery in Oslo (Norway), the Arriaga Theatre in Bilbao (Spain), the National Museum in Cracow (Poland), the historic walls of Salè (Morocco). Colorimetric analyses directly at the building surface for blackening/colour change characterisation using a portable spectrophotometer. Results achieved within this still running project on the composition of damage layers will be presented and discussed. Elaboration of carbon fractions data will be liked in particular to colorimetric parameters (L*a*b*), with the aim of exploring the application of monitoring of color change of architectural surfaces as potential strategy for preventive conservation.
VIII Forum Italiano di Scienze della Terra “GEOITALIA 2011"
333
333
Bonazza A.; Ozga I.; Tittarelli F.; Favoni O. ; Ghedini N.; Sabbioni C.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11585/106579
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