Importance of the Pore Structures During the Weathering Process of Stones in Monuments

  • Daniel Jeannette

Abstract

After World War II, salvaging monuments which were damaged or even demolished by bombing, justified urgent restoration treatments using techniques that did not always respect the usual constraints for this kind of work. Afterwards, it was decided by those in charge of the monuments to instigate new restoration works which took into greater account the conservation or «preservation» aspect of the monuments. At the same time, research was undertaken to determine the origin of all types of degradation observed in stone monuments, even those not destroyed during the war. The magnitude of the degradation and the rapidity of its development, even on recently restored monuments, needed a broad study to be carried out to investigate the causes of degradation and, if possible, to suggest ways for its limitation. It was hoped that the results of this research would lead to the immediate improvement of the current standards of restoration. This was also the period when many monuments and buildings were extensively cleaned. However, the real benefit of this type of «cleaning» was also questioned, especially because of the abrasion of the often protective calcite crust. Also questioned was the use of replacement stones that were more resistant than the original building stones.

Keywords

Clay Porosity Crystallization Siliceous Sandstone 

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© Springer-Verlag Berlin Heidelberg 1997

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  • Daniel Jeannette

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