Academic thesis
| Nina Bachmann-Dämmer: | Preservation and restoration concept for selected sandstone parapet elements of the Fridtjof-Nansen-Haus in Göttingen with special consideration of the handling of existing old hydrophobic coatings | Back |
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| Abstract: | Abstract The aim of the thesis at hand is to develop a conservation and restoration concept for the balustrade element "Woman at the Loom with Spinning Wheel" of the Fridtjof-Nansen-Haus in Göttingen made from sandstone of the Maintal region. The focus is on the question of how to deal with a possible hydrophobicity treatment. First of all, the current research findings will be elaborated and the resulting questions will be pointed out. This includes in particular the extent to which a hydrophobic treatment that is more than 40 years old is still detectable in the stone material and how this may have changed its properties. By means of comparative investigations of treated and untreated existing material, the effectiveness of the hydrophobic treatment can be demonstrated with contact angle measurements and investigations of capillary water absorption. The penetration depth achieved raises questions about the pore structure of the material, so that further scientific investigations (including water vapor diffusion resistance and adsorption isotherm) are carried out. The investigations carried out provide a broader understanding of the condition phenomena of the object and how these were created by the hydrophobic zone in the material. Based on this understanding, consolidation tests for further conservation treatment of the object will be carried out. The focus here is on the question of whether consolidation with silicic acid ester can achieve satisfactory penetration depth into the material despite the hydrophobic zone. The results are positive. Strengthening with silicic acid ester is possible and the penetration depth is satisfactory. However, the achieved consolidation profiles in the transition area between intact core material and consolidated zone need to be better balanced. This requires further, more in-depth consolidation tests with additional consolidants and different application methods. A concept for the preservation of the object will be developed on the basis of the assessment of the original technique, later changes by conservation measures and condition of the object together with the findings from the investigations and consolidation tests. |
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| Contact: |
Nina Bachmann-Dämmer nina@[Diesen Teil loeschen]bachmann-wille.de |
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