Modificaciones producidas en el sistema poroso de una calcarenita por alteración y tratamiento de conservación

1. Galan, E.
2. Fitznr, B.
3. Carretero, M.I.
4. Mayoral, E.

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Otras publicaciones en: Boletín de la Sociedad Española de Mineralogía

Resumen

Calcarenite from Puerto de Santa María, a stone widely used in historic monuments of Western Andalucía, does not show important porosity variations after five hundred years of weathering in the Cartuja of Seville. However, its macroporosity (ø 10-300µ) falls from 14% to 10% after a treatment with Tegovakon, an ethyl silicate harder, because of amorphus silica is deposited into the big pores, and also to surface area of micropores encreases due to the silica gel presence, but the porosity of the stone treatted with Tegosivin, a water repellent, does not vary. Nevertheless, both treatments lead to an abruptly decreasing of water absorption. In order to improve the technical characteristics of the Puerto stone as building material, a previous protection treatment with a harder followed of a water repellent is suggested.

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