Cit:Godts.etal:2017
| Author | Godts, Sebastiaan; Hayen, Roald; De Clercq, Hilde |
| Year | 2017 |
| Title | Salt extraction by poulticing in the archaeological site of Coudenberg |
| Bibtex | @inproceedings {Godts.etal:2017,
title = {Salt extraction by poulticing in the archaeological site of Coudenberg}, booktitle = {Proceedings of SWBSS 2017. Fourth International Conference on Salt Weathering of Buildings and Stone Sculptures, University of Applied Sciences Potsdam, Germany, 20-22 September 2017}, year = {2017}, editor = {Laue, Steffen}, pages = {200-207}, month = {september}, organization = {Fachhochschule Potsdam}, publisher = {Verlag der Fachhochschule Potsdam}, note = {fulltext, conference paper}, key = {SWBSS2017}, doi = {10.5165/hawk-hhg/337}, author = {Godts, Sebastiaan; Hayen, Roald; De Clercq, Hilde} } |
| DOI | 10.5165/hawk-hhg/337 |
| Link | File:SWBSS 2017 Proceedings 200-207 Godts Hayen DeClercq.pdf |
| Notes | in: Proceedings of SWBSS 2017 - Fourth International Conference on Salt Weathering of Buildings and Stone Sculptures. University of Applied Sciences, Potsdam, Germany, 20-22 September 2017 |
Bibliography
| [Godts.etal:2017] | Godts, Sebastiaan; Hayen, Roald; De Clercq, Hilde (2017): Salt extraction by poulticing in the archaeological site of Coudenberg. In: Laue, Steffen (eds.): Proceedings of SWBSS 2017. Fourth International Conference on Salt Weathering of Buildings and Stone Sculptures, University of Applied Sciences Potsdam, Germany, 20-22 September 2017,Verlag der Fachhochschule Potsdam 200-207, 10.5165/hawk-hhg/337. |   |
Abstract[edit]
A common method for the extraction of salts is the use of poultice materials. Despite extensive scientific research, the salt extraction process in practice often remains empiric. This paper aims to further the understanding of a salt extraction by poulticing in practical experiments. Three types of poultice materials are tested on brick masonry in 12 different locations in the subterranean archaeological site of Coudenberg in Brussels. The tested poultice materials have different compositions including kaolin clay, sand and/or cellulose fibres, theoretically favouring advection and/or diffusion. It is shown that for an accurate interpretation of the results it is crucial to evaluate the salt content in the poultice and to a depth of at least 20 cm in the different materials of the substrate, while considering the different densities and surface area of each material. Furthermore, it is shown that the presence of gypsum overshadows the results, hence the exclusion of equimolair contents of Ca2+ and SO4 2- is essential for the evaluation. Finally, the results of these experiments reveal that regardless of the different procedures, such as, the poultice type, pre-wetting or application time, salts are being redistributed into the wall rather than extracted.