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In Situ Conservation of the Roman Mosaics at the Villa of Boscéaz (Orbe, Switzerland): Diagnosis of Risks Involved

Published online by Cambridge University Press:  26 February 2011

R.J. Flatt ,
F.J. Girardet  and
D.C. Weidmann
R.J. Flatt
Affiliation:
LTP, DMX, Swiss Federal Institute of Technology, CH-1015 Lausanne, flatt@dmx.epfi.ch
F.J. Girardet
Affiliation:
LCP, DMX, Swiss Federal Institute of Technology, CH-1015 Lausanne, girardet@dmx.epfl.ch
D.C. Weidmann
Affiliation:
Departement of Historical Monuments and Archeology, pl. Riponne 10, CH-1014 Lausanne
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Abstract

In order to maintain the archaeological integrity of the site of Boscéaz, one of the most remarkable north of the Alps because of the number and quality of its roman mosaics, it is intended to maintain these in situ and on their original support. This mode of conservation implies many risks, mainly linked to the climatic variations and to the presence of water and salts in the ground and the mosaics. The high degree of damage observed on these mosaics discovered more than 150 years ago illustrates this fact.

The aim of this study has been to establish a diagnosis of the risks linked to the uncovering and the in situ conservation of a mosaic recently discovered (currently covered with protective materials). This diagnosis has been established on the basis of the measurement of the physical and chemical properties of the mosaic and the ground.

It turned out that the rising of salts from the ground to the mosaic would be the major problem and that consequently a dessalaision will have to be carried out. Concerning the choice of the climatic conditions for conservation, the critical zone in which the salts present crystallize was determined. The thermal dilatation of the materials appeared relatively small, but might become damageable in the long term because of a possible hysteresis. The hydrie dilatation turned out to be negligible.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 462: Symposium DD – Materials Issues in Art and Archaeology V , 1996 , 317
Copyright
Copyright © Materials Research Society 1997

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References

REFERENCES

1. Weidmann, D., Flatt, R., Félix, C., Girardet, F., Glauser, A. (1997) Analyse des altérations et déformation de mosaïques à Orbe-Boscéaz (Canton de Vaud, Suisse). Sixth Conference of the International Committee for the Conservation of Mosaics. Nicosie 1996 (in press).Google Scholar
2. Weidmann, D. (1987) Problèmes de gestion et de conservation des mosaïques d'Orbe - Boscéaz (Vaud - Suisse), abritées depuis 1841. Fourth Conference of the International Committee for the Conservation of Mosaics. Soria 1986.Google Scholar
3. Arnold, A. and Zehnder, K. (1989) Salt weathering on monuments. La conservazione dei monumenti nel bacino del Mediterraneo, Atti del 10 Simpossio Internale, Bari, pp. 31–58.Google Scholar
4. Podany, J., Agnew, N., Demás, M. (1994) Preservation of excavated mosaics by reburial: evaluation of some traditional and newly developed materials and techniques. Fifth Conference of the International Committee for the Conservation of Mosaics. Soria 1986.Google Scholar
5. Puertas, F., Blanco-Várela, M. T., Palomo, A., Ortega-Calvo, J. J., Ario, X. and Saiz-Jimmenez, C. (1994) “Decay of Roman and repair mortars in mosaics from Italica, Spain”. The science of the Total Environment, 153, pp. 123–131.Google Scholar
6. Ausset, P., Crovisier J.-L., Del Monte, M., Furlan, V., Girardet, F., Hammecker, C., Jeannette, D. and Lefèvre, R. A. (1996) Experimental study of limestone and sandstone sulphation in polluted realistic conditions: the Lausanne Atmospheric Simulation Chamber (LASC). Atmos. Environ. vol. 30 no 18, pp. 3197–3207.Google Scholar
7. Calarne, F. Station Federale de Recherches Agronomiques de Changins, Switzerland (private communication).Google Scholar
8. Laue, S. (1995) Climate controlled behavior of soluble salts in the Crypt of St. Maria im Kapitol, Cologne» Proceedings of the LCP Congress 1995, Montreux, pp. 447–454.Google Scholar
9. Price, C. and Brimblcombe, P. (1994) Preventing salt damage in porous materials. Preventive Conservation - practice, thoery and research, Prepr. Contr. Ottawa Congr. 12–16 Sept. Ed. Roy, Ashok and Smith, Perry, pp. 90–93.Google Scholar
10. Steiger, M. and Dannecker, W. (1995) Hygroscopische Eigenschaften und Kristallisationsverhalten von Salzgemischen. Jahresbericht Steinzerfall - Steinkonservierung, Verlag Ernst & Sohn, Berlin, pp. 115–128.Google Scholar
11. Work done by Franciosi, G. and Parriaux, A. from the Laboratory of Geology (GEOLEP) at Swiss Federal Institute of Technology in Lausanne (EPFL).Google Scholar