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

Inge Rörig-Dalgaard, P. Bøllingtoft

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

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
Publication statusPublished - 2011
Event2nd International Conference on Salt Weathering on Buildings and Stone Sculptures - Limassol, Cyprus
Duration: 19 Oct 201122 Oct 2011
Conference number: 2

Conference

Conference2nd International Conference on Salt Weathering on Buildings and Stone Sculptures
Number2
CountryCyprus
CityLimassol
Period19/10/201122/10/2011

Keywords

  • Ionic mixture
  • Desalination
  • Electromigration
  • Church vault

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