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Título

Study of the porous network of granites from Avila and its modifications by ethyl silicate treatment

AutorIñigo, Adolfo C. ; Jiménez de Haro, María del Carmen
Palabras claveGranites
Porosity
Consolidation
Ethyl silicate
Fecha de publicación1996
EditorEuropean Commission
CitaciónDegradation and conservation of granitic rocks in monuments. Protection and conservation of European cultural heritage. Reserach report nº 5. 1996. pág: 139-144
ResumenThe porosity is one of the most important properties of a building stone. It influences its behaviour and the effectiveness of a treatment. In this paper, we study the porous network of granites from Avila using mercury porosimetry. Two injections have been made in order to distinguish between free and trapped porosity. Five varieties of granites from quarry have been studied. Strong variations of the total porosity and of the specific surface has been shown among the different facies of granites. These granites were aged in the laboratory by twenty five cycles of cold/heat and freezing/thawing from -20ºC to 110ºC, and after that, studied by mercury porosimetry. No variations of the porosity are noticed in the grey Avila sample. In the naturally weathered facies (ochre, red and white varieties), variations in the specific surface area are noticed, however, the total porosity has not been modified. A consolidation treatment has been carried out in the granites from quarry as well as in the aged ones, and these samples are were also studied by this technique.
Versión del editorhttp://ec.europa.eu/index_es.htm#
URI10261/19373
ISSN1018-5593
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