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Título del libro: Science, Technology And Cultural Heritage - Proceedings Of The 2nd International Congress On Science And Technology For The Conservation Of Cultural Heritage, 2014
Título del capítulo: The Mayan stucco masks from Edzná: Material characterization and analysis of the environmental influence on their deterioration

Autores UNAM:
JOSE LUIS RUVALCABA SIL; PATRICIA QUINTANA OWEN;
Autores externos:

Idioma:
Inglés
Año de publicación:
2014
Palabras clave:

Building materials; Deterioration; Plaster; Roofs; Salts; Stratigraphy; Stucco; X ray diffraction; Direct impact; Dissolution-crystallization; Environmental influences; Material characterizations; Stratigraphic analysis; Temperature and relative humidity; Tropical environments; X ray fluorescence; Historic preservation


Resumen:

The Mayan site of Edzna is located on a humid tropical environment and such condition has a direct impact on the preservation of its buildings and artworks. This work is focused on two pre-Hispanic colored stucco masks that were discovered on the site over 30 years ago and show today an important level of deterioration. Such deterioration occurred even when both masks were protected by an acrylic roof for one case and a natural ?guano? palm roof for the other. The stucco composition was determined by X-Ray Fluorescence (XRF), X-Ray Diffraction (XRD) and stratigraphic analysis. It was possible to appreciate the effect of microenvironmental variations of temperature and relative humidity in the preferential mechanisms of salts formation. The differential forces caused by dissolution- crystallization cycles of such salts are deemed to be responsible for the deterioration of the masks. © 2014 Taylor & Francis Group, London.


Entidades citadas de la UNAM: