It was a surprise to the historical preservation authorities: oolite limestone from Lorraine, a sedimentary rock which consists of small mineral globules (oolites), was used in the Czech Republic as well. Limestone, however, is subject to more rapid and deeper rock damage than siliceous rock in areas with extensive environmental pollution. Therefore the goal of this project was the development of a model approach to the preservation of oolite rock, to be used in a model application at the portal of the collegiate church at Teplá and at a sepulcher in the Melaten Cemetery of Cologne. Both project locations, Cologne and Teplá, have long suffered from highly polluted air, and show extensive damage as a result. The project achieved its goals of transferring the accepted German standards for preliminary investigations of objects and materials for stone preservation in an adapted form to the Czech Republic. The findings from the selected test objects and sample surfaces in Teplá and in Cologne which were gathered during this project contributed substantially to the establishment of conservation standards for Barrois oolites. Furthermore, the necessary fundamental knowledge for both the damage mapping and the maintenance work on the rock now exists. The level of expertise about the various quarry areas in Lorraine was expanded, which will enable the restorers to use original material in repairs.
Project implementation:
TU München, Lehrstuhl für Ingenieurgeologie
Dipl.-Geol. Dr. Gerhard Lehrberger
München
www.eng.geo.tum.de
Cooperation partner:
• Labor Plehwe-Leisen, Dr.Esther von Plehwe-Leisen, Köln
• Prämonstratenserkloster Teplá, Tschechische Republik, www.klastertepla.cz
• Fachhochschule Köln, Institut für Restaurierungs- und Konservierungswissenschaften, Prof. Dr. Hans Leisen, Köln, https://www.th-koeln.de/kulturwissenschaften/institut-fuer-restaurierungs--und-konservierungswissenschaft_10217.php
• Fachlabor für Konservierungsfragen in der Denkmalpflege, Dr. Eberhard Wendler, München
• Natursteinconsulting Lorenz, Dipl.-Geol. Heinz G. Lorenz, Röttenbach
• Büro für Denkmalpflege und Bauwerkserhaltung, Dipl.-Geol. Dr. Ludwig Sattler, München
AZ 28433
