Читать книгу Monument Future - Siegfried Siegesmund - Страница 199

The damages observed at Avan Cathedral are dominated by cracks and crackles of single ashlar, back-weathering, scaling and static problems of the top of the single building walls and pillars (Fig. 2c). At the Zvartnots ruins, the damage is primarily caused by widespread salt contamination associated with back-weathering and rounding (Fig. 2d, 4).

Historical photographs from the beginning of the 20th century show, that at some parts of the original walls even the historical whitish plaster was 139preserved (Fig. 2e). Today all the plaster surfaces are destroyed. Many of the stones are damaged by typical weathering forms associated with the presence and crystallization of salt (Fig. 2d, 4).

Figure 2: a) The remains of medieval architectural structures in Sanahin, Armenia shows the huge amounts of mortar within the building structure. b) Cross section of a wall at the Avan Cathedral. c) The critical static situation at the top of the walls at Avan Cathdral. Restoration mortar from the 1941 campaign is exposed in the lower parts of inner masonry. d) Widespread salt contamination and weathering at the Zvartnots Cathedral. e) Huge remnants of the inner masonry and preserved plaster on some walls at the Zwartnots Cathedral shown in the museum of the site (early 20^th century). f) Cement mortar injections done by restoration in the 1960 s also documented in the museum.