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Konserwacja kamiennego detalu architektonicznego Zamku na Wawelu : prace w latach 1984-1986

100%

Stępień P.

Ochrona Zabytków

1987

issue 4

304-312

The article presents conservation work done on a stone architectonic detail in the Castle at the Wawel Hill carried out in 1984-1986 by the team headed by the author and operating within the Management for the Renewal of the Royal Castle at the Wawel Hill (at present a branch office of the PP PKZ). The work was preceded with a detail examination of the laboratory studies made by the Centre for the Studies on the History of Engineering at the Higher Mining School (A.G.H.) in Cracow. The destruction of a stone architectonic detail of the Castle, made from poorly weather-proof sandstone and limestone, is caused mainly by chemical corrosion (sulphur compounds and other gas pollution of the atmosphere) combined with atmospheric humidity. At the same time a high dust fall brings about strong soiling and results in blocking stone pores. The basic conservation treatment includes: removal of the "sheir of layers, consolidation of impaired material and protection against hydrophobization. The work done in the Wawel Castle in the discussed period compromised the preservation of stone elements in the Senatorial Stairs, part of the portals and window framings in the Arcade Courtyard as well as the west elevation of a gate wing. Organic silicone preparations both imported (Steinfestiger OH and Steinfestiger H made by Wacker- -Chemie) and Polish ones (Ahydrosil Z elaborated by the Institute of Industrial Chemistry in Warsaw) were used for the consolidation and hydrophobization. A very poor condition of the preserved parts called for a special treatment consisting, i.a., in preparatory stregthening of the stone prior to cleansing, injections, protection of stratifications with strips of putty, addition of acrylic resin to consolidating preparations (because of stratifications and crackings). Solutions of ammonium, carbonate and alcalic pastes that act mildly but effectively were amongst the products used for cleansing. The missing parts were mostly made up with lime stone putty and only in some exceptional cases with putty made from stone dust based on acrylic resin.

Pałac Krasińskich w Warszawie - stan zachowania i problemy ratowania dekoracji rzeźbiarskiej

70%

Procyk W.

Ochrona Zabytków

2002

issue 2

170-185

The articles discusses historical buildings or their fragments salvaged or recreated in the course of postwar reconstruction. Conservation frequently entails the necessity of decisive intervention in matter more than fifty years old. The concealed phase of the corrosion of steel connectors entails numerous threats. It is necessary to study the technology of fixtures applied in historical monuments; this holds true also for postwar reconstruction. Despite constant surrusion the non-symptom period is brief and has an uncontrolled course. Its consequences include the dramatic effects of the disintegration of the stone. In such situations the best option is the disassembly of the strained compositions, the elimination of threats, and a structural impregnation of the strained stone by means of petrification compounds. The assembly of the Krasiński Palace attic revealed the durability of water-repellent protection and its impact upon stratification and the methods of its removal. The most essential conclusion drawn from scanning and studies of porosity was the ascertainment of the cumulation of amorphous layers of siliceous-organic resin in the capillary systems under the stone surface in consecutive cycles of conservation. Individual research confirmed the reduction of the general diameter of effective pores after consolidation and impregnation. The last phase drew attention to the iconographie aspect of the depiction of a duel between Corvinus and a Gaul in the bas-relief decoration of the tympanum. An analysis of source material collected in the course of conservation demonstrated irrefutably th a t the postwar reconstruction of the elements of the sculpted decoration of this p a rt of the composition was not conducted to the very end or that the interpre tation was mistaken. A minute analysis of enlarged prewar photographs made it possible to make a new proposal of a reconstruction of the nonextant elements, thus restoring meaning to this part of the likeness. The article also brings the reader closer to the southern elevation of the palace (the bas-relief motif of the triumphant entry of Marcus Valerius Corvinus to Rome); here threats remain unresolved, the destruction of block makes headway, and details of the bas relief continue to be shed.

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2 Ochrona Zabytków

1 Procyk W.

1 Stępień P.

1 2002

1 1987

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Konserwacja kamiennego detalu architektonicznego Zamku na Wawelu : prace w latach 1984-1986

Pałac Krasińskich w Warszawie - stan zachowania i problemy ratowania dekoracji rzeźbiarskiej