Читать книгу Monument Future - Siegfried Siegesmund - Страница 206

The high values of sulfate measured at the Zvartnots Cathedral could probably be due to the use 143of cement mortar, implemeted during restoration works at the ruins in the 1950s–1980s (Fig. 2f). Rain water could also be one possible source, since immense infiltration took place at many walls of the ruins. However, aggressive magnesium sulfpher salts could be formed if a dolomitic lime was used for the historical mortar. This should be clarified by further investigations.

Figure 6: Damage mapping of the right half of the main façade at the Avan Cathedral.

A proper desalination method has to be tested and applied. The first experimental conservation works during the summer school 2019 using poultices and the sprinkling method (Wedekind, Ruedrich 2006) have shown promising results.

The observations and results show that the restoration mortar, which is comparable to the historical mortar could be a proper material for both historical objects.

To discover the secret of its eternity and to prepare and develop a suitable and sustainable mortar for restoration, should be the main goal of future research.