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An innovative in-situ multianalytical methodology is presented to assess the conservation state of a sandstone entrance arch of 18th century La Galea Fortress, located in Getxo, north of Spain. The high number of areas to analyze conducted us to select several portable instruments to perform the work in-situ, that taken measurements in more than 250 points of the arch. The first screening was performed...
Black crust in buildings can be formed as a result of different kind of chemical and physical reactions between the stone surface and environmental factors (e.g. acid aerosols emitted to the atmosphere, airborne particulate matter, etc.). Moreover, biological colonizations can also be present on them. This kind of pathology is widely present in limestones, but fewer are the case study dealing with...
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