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Clay Poultices in Salt Extraction from Ornamental Stones: A Statistical Approach

Published online by Cambridge University Press:  28 February 2024

Maria Angeles Vicente  and
Santiago Vicente-Tavera
Maria Angeles Vicente
Affiliation:
Departamento de Química y Geoquímica Ambiental, IRNA/CSIC, Salamanca, Spain Unidad Asociada CSIC/Universidad de Salamanca, IRNA, Apdo 257, 37071, Salamanca, Spain
Santiago Vicente-Tavera
Affiliation:
Departamento de Estadística, Universidad de Salamanca, Salamanca, Spain Unidad Asociada CSIC/Universidad de Salamanca, IRNA, Apdo 257, 37071, Salamanca, Spain
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Abstract

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The extraction of salts by layered (bentonite) and fibrous (sepiolite) clay poultices from stone materials currently used in Heritage buildings was studied. Analyses were performed on stones affected by salts but not submitted to humidity, and also on stones affected by salts and simultaneously submitted to continuous or intermittent humidity during the salt-extraction process. From the experimental results and the statistical analysis, the application of two successive poultices is sufficient for an efficient extraction of Cl− and NO3- in the absence of humidity. However, under humid conditions, the efficiency of the method is reduced considerably. For SO42-, the use of hydrotalcites (anionic clays) is recommended for more effective extraction.

Keywords

BentoniteConservationHistorical Heritage BuildingsMANOVA-BiplotOrnamental StonesPoulticesSaltsSepioliteWeathering of Stone
Type
Research Article
Information
Clays and Clay Minerals , Volume 49 , Issue 3 , June 2001 , pp. 227 - 235
Copyright
Copyright © 2001, The Clay Minerals Society

Footnotes

†

Deceased.

References

Arnold, A., 1996 Alteration et conservation d’oeuvres culturelles en matériaux poreux affectés par des sels Le dessalement des matériaux poreux France Darantier 1–20.Google Scholar
Bromblet, P. and Verges-Belmin, V., 1996 L’élimination des sulfates sur la statuaire calcaire de plein air: un habitude discutable Le dessalement des matériaux poreux France Darantiere 55–64.Google Scholar
Evans, I.S., 1970 Salt crystallisation and rock weathering: A review Revue Géomorphologie Dynamique 19 153–177.Google Scholar
Gabriel, K.R., 1971 The biplot-graphic display of matrices with applications to principal component analysis Biome-trika 58 453–467.Google Scholar
Gabriel, K.R., 1972 Analysis of meteorological data by means of canonical decomposition and biplots Journal of Applied Meteorology 11 1071–1077 10.1175/1520-0450(1972)011<1071:AOMDBM>2.0.CO;2.2.0.CO;2>CrossRefGoogle Scholar
Gabriel, K.R. and Krzanowsky, W., 1995 MANOVA biplots for two-way contingency tables Recent Advances in Descriptive Multivariate Analysis Oxford, England Clarendon Press 227–268.CrossRefGoogle Scholar
Galindo, M.P., 1986 Una alternativa de representacion simultanea: HJ-Biplot Qüestiio 1 13–23.Google Scholar
Garcia-Talegón, J. Ifligo, A.C. Vicente, M.A. Vargas, M. Pérez-Rodriguez, J.L. and Molina, E., 1994 Granites employed in Avila (Spain). I: Chemical composition of the différents types Materiales de Construcciôn 44 23–28 10.3989/mc.1994.v44.i233.594.Google Scholar
Garci’a-Talegón, J. Vicente, M.A. and Molina, E., 1999 Decay of granite monuments due to salt crystallization in a non-polluted urban environment Materiales de Construcciôn 49 17–27 10.3989/mc.1999.v49.i253.454.Google Scholar
Gower, J.C. and Hand, D.J., 1996 Biplots London Chapman & Hall.Google Scholar
Inigo, A.C. Garcia-Talegón, J. Vicente, M.A. Vargas, M. Pérez-Rodrfguez, J.L. and Molina, E., 1994 Granites employed in Avila (Spain). II: Petrophysical characteristics Materielles de Construction 44 28–37.Google Scholar
Ling, D. and Smith, S., 1996 To desalinate or not to desalinate? That is the question Le Dessalement des Matériaux Poreux 65–74.Google Scholar
NORMAL, 1983 Dosaggio dei sali solubil .Google Scholar
Simon, S. Herrn, C. Porst, A. and Pursche, J., 1996 Desalination and control of salt transport phenomena experiences with compress renderings in the ring crypt of St. Emmeram, Regensburg Le Dessalement des Matériaux Poreux 147–159.Google Scholar
Trujillano, R. Vicente, M.A. and Rives, V., 1998 Utilization de arcillas catiónicas y aniónicas en la limpieza y desalado del Patrimonio Histórico Congreso International de rehabilitation del Patrimonio Histórico, Libro de Actas Cuba La Habana 192–194.Google Scholar
Vicente, M.A., Vicente, M.A. Delgado-Rodrigues, J. and Acevedo, J., 1994 Granitic materials and historical monuments: Study of the factors and mechanisms of weathering and application to historical heritage conservation Degradation and Conservation of Granitic Rocks in Monuments Brussels Research and Development 4–45.Google Scholar
Vicente, M.A. and Zezza, F., 1996 The role of salt crystallization in the degradation processes of granite monuments Origin, Mechanisms and Effects of Salts on Degradation of Monuments in Marine and Continental Environments Bari, Italy Tecnomack 147–155.Google Scholar
Vicente-Villardon, J.L., 1992 Una alternativa a los métodos factoriales clâsicos basada en una generalization de los métodos biplot Spain Ph.D. thesis, Univ. Salamanca, Salamanca.Google Scholar
Weber, J. Leitner, H. Gaggi, W. Szambelan, R. and Zezza, F., 1996 Crystallization of sulphate salts induced by selective salt extraction by poultices: Results from a case study Origin, Mechanisms and Effects of Salts on Degradation of Monuments in Marine and Continental Environments Italy Tecnomack, Bari 167–181.Google Scholar