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Book Chapter

Fire damage of trachyte: investigations of the Teplá monastery building stones

By
Stephanie Gillhuber
Stephanie Gillhuber
Technische Universität München, Lehrstuhl für Ingenieurgeologie, Arcisstraße 21, D-80333 München, Germany
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Gerhard Lehrberger
Gerhard Lehrberger
Technische Universität München, Lehrstuhl für Ingenieurgeologie, Arcisstraße 21, D-80333 München, Germany
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Jürgen Göske
Jürgen Göske
Zentrum für Werkstoffanalytik Lauf GmbH, Hardtstrasse 39b, D-91207 Lauf, Germany
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Published:
January 01, 2010

Abstract

The building stones of Teplá monastery (founded 1193) experienced a huge fire in 1677. Trachyte as a major rock type responded by changing colour from light beige to pink-red. Laboratory tests, during which the fresh unaltered stone from the original quarry was heated, proved the same reddened surface. Three varieties of local trachyte were examined: a greyish, naturally very fresh type (TA), a yellowish, slightly weathered and therefore iron hydroxide-bearing type (TB) and a trachyte typical with black manganese oxide dendrites and patches (TC). The changes of the physical properties and composition of these rocks were examined by ultrasonic velocity, thin section analysis, SEM observation and XRD tests. The experimental studies showed that Teplá trachyte is generally fire resistant up to 1000 °C.

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Contents

Geological Society, London, Special Publications

Natural Stone Resources for Historical Monuments

R Přikryl
R Přikryl
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Á Török
Á Török
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Geological Society of London
Volume
333
ISBN electronic:
9781862395817
Publication date:
January 01, 2010

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