Characterization of lime mortar additivated with crystallization modifiers

Sanne Granneman, Barbara Lubelli, Rob van Hees

Research output: Contribution to journalArticleScientificpeer-review

6 Citations (Scopus)
79 Downloads (Pure)

Abstract

Additivating mortars with crystallization modifiers is a novel approach to mitigate salt crystallization damage in historic masonry. Once verified the effectiveness of crystallization modifiers in bulk solution, the next step consists in verifying whether: (i) modifiers are still effective when mixed in mortar and going through the carbonation process and (ii) modifiers alter any mortar properties which might limit their application. This research addresses these issues for sodium ferrocyanide and borax, modifiers for sodium chloride, and sodium sulfate, respectively. Several experimental techniques have been applied to elucidate these questions. The results show that the selected modifiers are still able to alter the salt crystallization after going through the carbonation process of the mortar. Besides, no major effects of the modifiers on the fresh and hardened mortar properties were observed. It can therefore be concluded that there are no restraints for the future use of these crystallization modifiers in restoration mortars.
Original languageEnglish
Number of pages10
JournalInternational Journal of Architectural Heritage
DOIs
Publication statusE-pub ahead of print - 18 Jan 2018

Keywords

  • Borax
  • ferrocyanide
  • lime mortar
  • mixed-in crystallization modifiers
  • mortar properties
  • salt decay

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