Keywords
rock pathologies
historical heritage
COMOS-ISCS glossary
How to Cite
Abstract
Ignimbrite is a volcanic rock widely used in historical buildings and monuments in Mexico due to its versatility, durability, availability, and aesthetic appeal. Ensuring restoration and preservation of buildings and monuments relies heavily on understanding the petrological properties of the rocks employed in their construction, alongside other physical traits such as porosity. This study outlines a methodology and findings regarding assessing decay in masonry of the historic building Casa Rosal 102a, in the La Purisima district of Aguascalientes, México. This evaluation relies on petrological characterization, represented as mapped data, focusing on volcanic rocks comprising the building’s facade. This research analysis drew comparisons between the petrological characterization mappings and those generated from rock pathologies. The latter were formulated using criteria outlined in the Illustrated Glossary of Degradation Phenomena and Processes (ICOMOS-ISCS), a resource crafted by the International Council on Monuments and Sites (ICOMOS) as an integral component of the UNESCO chair for world heritage preservation. The described methodology was developed during the COVID-19 pandemic as a field practice supervised by the instructors for first-semester students in the Civil Engineering Master's program at the Universidad Autónoma de Aguascalientes. It aimed to provide hands-on experience in the petrological characterization of volcanic rocks and evaluating historical buildings in Aguascalientes. Analysis revealed a diverse range of damages primarily concentrated in the lower areas, notably the northwest section of the facade. These damages predominantly stem from the rock's soldering characteristics, which, in these instances, oppose the expected porosity. The uneven capillary water ascent through the rock accumulates moisture primarily on the NW side of the facade.
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