Electrochemical desalination of the ionic mixture measured in the vault of Rørby Church - Laboratory scale

Publication: Research - peer-reviewArticle in proceedings – Annual report year: 2011

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Salt induced deterioration of the vault in Rørby Church has resulted in extensive deterioration of the vault itself and of the murals on the lower surface of the vault. The upper surface of the vault has previously been covered with cement mortar. After removing this cement mortar some of the bricks erode and form brick powder. The brick powder was collected in 2002, 2005 and 2011 and measured for the most common salts in Danish vault structures. On the basis of the actual measured ions two different salt mixtures were made and used for contamination of brick specimens. By use of an applied electric DC field the nitrate and chloride contents were reduced to very low contents and the sulphate content was significantly reduced in the main part of the specimens. According to the results of the experiments it seems likely that the present ions in the upper part of the vault of Rørby church can be extracted electrochemically if the salts in the construction can be dissolved.
Original languageEnglish
Title of host publicationProceedings of Salt Weathering on Buildings and Stone Sculptures 2011
Publication date2011
StatePublished

Conference

ConferenceSalt Weathering on Buildings and Stone Sculptures 2011
Number2011
CityLimassol, Cyprus
Period01/01/11 → …

Keywords

  • Ionic mixture, Desalination, Electromigration, Church vault
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