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Mineralogical analysis of mortars in the walls of Ávila (Spain) and its surroundings

AuthorsSoto García, Isabel Sonsoles de; Soto García, María de los Reyes de; García Giménez, Rosario
Granitic rocks
Issue Date24-Jun-2019
PublisherMultidisciplinary Digital Publishing Institute
CitationMinerals 9(6): 381 (2019)
AbstractThe present article evaluated the mineralogical composition of 85 mortar samples from some emblematic monuments of Ávila city (Spain), which were collected during the restoration of the monuments. The aim of this article is to try to extract the relationship between the composition and the origin of the raw materials, as well as to identify possible alterations in the samples. The study of the samples was carried out using visual and petrographic techniques such as stereoscopic microscope, XRD, and SEM/EDX analysis. The main components of the mortars were calcite, feldspar and quartz, although small amounts of phyllosilicates were also identified. The minerals of the mortars came from the surroundings of the city, and some of the samples presented evident alteration of the original materials due to humidity, salt concentration, and biological weathering, possibly inducted by unfortunate effects of the restoration. Finally, a study of the salts present in some mortars showed that most samples display contamination of soluble salts such as halite, thenardite, hexaedrite, and carnalite. This investigation offers fresh insight into historic building activity and related techniques, and should provide knowledge useful for restoration and conservation processes.
DescriptionThis article belongs to the Special Issue Petrography of Construction Materials: Compositional, Mineralogical and Textural Features.
Publisher version (URL)https://doi.org/10.3390/min9060381
Appears in Collections:(IAM) Artículos
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