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Znaczenie badań petrograficznych przy rekonstrukcji obiektów kamiennych

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Lorenc M. W.

Ochrona Zabytków

2014

issue 2

155-162

Many monumental objects, especially older ones, were made of stones which, contrary to their proverbial durability, with time and in various environmental conditions can decay. The speed of this process and the resistance of stone depend not only on environmental conditions but also to a great degree on the quality of material used for building the object considered today as “monumental”. Degradation processes often lead to such stone loss that conservator work requires making proper refills. Smaller damages are refilled with appropriate mineral masses, whereas in case of bigger damages refilling with natural stone is necessary. In some cases after many years the refilled parts, which are more or less resistant to atmospheric conditions than the monument’s stone, differ not only by color but also by surface texture and presence of secondary mineral efflorescence, etc. This is caused by improper choice of stone material for reconstruction. The stone used for refill should be exactly the same or as much similar as possible. It can be done only after previous detailed petrographic analysis allowing to determine unequivocally the type of stone which the monument is made of. If there is no information about the source material in the monument’s documentation, the only solution is to choose material most similar to the original one in respect of mineral composition and structural characteristics. Only then the stone material used for refills will be appropriate and stonework performed properly will not leave marks or marks will be completely harmless for the object.

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1 Ochrona Zabytków

1 2014

1 Lorenc M. W.

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Znaczenie badań petrograficznych przy rekonstrukcji obiektów kamiennych