Eflorescencias y costras sobre areniscas de Villamayor. Ensayos de laboratorio

Madruga, F.; Saavedra, J.; Patino, M. T. Martín

doi:10.3989/mc.1994.v44.i234.587

Cited by 3 publications

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“…Las probetas de forma cilindrica, 10 cm de diámetro y 2 cm de alto, se cortaron de la parte interna de cada testigo, de tal manera que las superficies, inferior y superior, fueran paralelas al plano expuesto al exterior en el edificio. Éstas se colocaron en la bandeja que contenía una disolución salina, quedando las bases en contacto con el líquido y las superficies superiores al aire (13). El resto de las superficies se protegieron para evitar la evaporación en esas zonas.…”

Section: Ensayos Acelerados En Areniscas Deterioradas Y No Deterioradasunclassified

“…They were cut from the inside of each original sample in such a fasi on that the bottom and top surface ares were parallel to the plane exposed to the outside in the building. The test samples were placed on a tray with a saline solution, the bottom end in the liquid and the top end in the air (13). The remaining surface was protected to prevent evaporation there.…”

Section: Accelerated Tests In Deteriorated and Unaffected Sandstonementioning

confidence: 99%

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Deterioro selectivo de las areniscas en las catedrales de Salamanca. La anisotropía textural como factor del mismo

Patino¹,

Madruga²,

Saavedra³

1994

Mater. construcc.

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Deterioro selectivo de las areniscas en las catedrales de Salamanca. La anisotropía textural como factor del mismo Selective sandstone deterioration in the cathedrals of Salamanca, Textural anisotropy as a causeFedia de rccq)ción: 6-V-94 RESUMEN La anisotropia textural de las areniscas se relaciona con la selectividad de su deterioro en los edificios.Las muestras estudiadas pertenecen a las Catedrales de Salamanca. Fragmentos de piedra, cortados en direcciones diferentes respecto a la base sobre la que se asientan los sillares en el muro, son estudiados por medio de la lupa binocular y del microscopio electrónico de barrido (SHM).De éstos se deduce que la microfábrica de las areniscas tiene una microtextura granular y otra laminar, que corresponden a direcciones diferentes del plano respecto al asiento del sillar. Una u otra de estas situaciones coincide con la superficie de la piedra expuesta al exterior en el edificio, y afectan a su deterioro superficial de forma diferente. Las capas externas en las que predomina la arcilla tienen menos resistencia a los agentes de alteración.Las imágenes del SHM de los cortes en piedras deterioradas se compararon con los de piedras no deterioradas, y ambos en direcciones diferentes respecto al asiento del sillar, deduciendo que la posición dada al bloque de piedra en el edificio es importante para su conservación.La velocidad de transmisión de ultrasonidos, medida en muestras de cantera comercial, confirma la anisotropía textural de las areniscas, en mayor o menor grado. ABSTRACT Textural sandstone anisotropy is related to the selective deterioration of such stone in buildings.The samples studied come from the Cathedrals of Salamanca. Stone fragments, cut in different directions with regard to the base supporting the ashlars in the wall, are studied by means of a binocular magnifying glass and the Scanning Electron Microscopy (SEK4).This shows that the sandstone microfabric has a granular and a laminar microtexture, which correspond to different directions in the plane in question as regards the position of the ashlar. Either of these circumstances coincide with the stone surface on the outside of the building and affect its surface deterioration in a different way.The SEM images of deteriorated stone were compared with those of unaffected stone, with both types coming from differently orientated cuts as regards the position of the ashlar. In conclusion, the position given to the block of stone in the building is of impofiance for the preservation of the stone. 7 he speed ofidtrasound transmission measured in samples from commercial quarries confirms the textural sandstone anisotropy to a greater or lesser extent.

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Section: Ensayos Acelerados En Areniscas Deterioradas Y No Deterioradasunclassified

Section: Accelerated Tests In Deteriorated and Unaffected Sandstonementioning

confidence: 99%

Deterioro selectivo de las areniscas en las catedrales de Salamanca. La anisotropía textural como factor del mismo

Patino¹,

Madruga²,

Saavedra³

1994

Mater. construcc.

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Damage of porous building stone by sodium carbonate crystallization and the effect of crystallization modifiers

Ruiz-Agudo,

Ibañez-Velasco,

Ruiz-Agudo

et al. 2024

Construction and Building Materials

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Villamayor Stone (Golden Stone) as a Global Heritage Stone Resource from Salamanca (NW of Spain)

Talegón

Iñigo

Alonso-Gavilán

et al. 2014

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Villamayor Stone (VS) is an arkosic stone and is known by several names: (i) VS because the quarries are located in Villamayor de Armuña village (Salamanca, Spain); (ii) Golden Stone due to its patina, which gives the stone a ochreous/golden colour; (iii) Franca Stone is known locally and in historical documents. VS has several varieties ranging from channel to floodplain facies. In this work, we have selected three varieties. VS was quarried and used in the construction of Romanesque monuments such as the Old Cathedral, Gothic monuments including the New Cathedral and the University façade, and Baroque monuments, notably the Main Square. Also, VS was used in the reconstruction of the Roman Bridge (Salamanca, Spain). Currently, VS is quarried by a small number of family businesses, using traditional methods for cladding façades of new buildings. Unfortunately, part of the construction sector went bankrupt in the 2008 crisis. However, VS is still the main stone used in the city of Salamanca for the restoration of monuments, even though used in relatively small quantities in comparison with usage before the economic crisis. It is thus of great importance for future generations that their quarries and the craft of masonry be protected. This work proposes that VS should be designated as a Global Heritage Stone Resource.

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Eflorescencias y costras sobre areniscas de Villamayor. Ensayos de laboratorio

Abstract: Ensayos acelerados realizados en el laboratorio, permiten estudiar el material cristalino depositado sobre la superficie de areniscas cuando están en contacto con disoluciones acuosas de diferente composición.

Cited by 3 publications

References 1 publication

Deterioro selectivo de las areniscas en las catedrales de Salamanca. La anisotropía textural como factor del mismo

Deterioro selectivo de las areniscas en las catedrales de Salamanca. La anisotropía textural como factor del mismo

Damage of porous building stone by sodium carbonate crystallization and the effect of crystallization modifiers

Villamayor Stone (Golden Stone) as a Global Heritage Stone Resource from Salamanca (NW of Spain)

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