Lime mortar with mixed in crystallization modifiers to mitigate salt damage

Sanne Granneman, Barbara Lubelli, Rob van Hees

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

2 Citations (Scopus)

Abstract

Although salt crystallization damage is a widespread damage process in the porous materials of our built cultural heritage, no definite solution yet exists to improve the durability of materials with respect to salt crystallization. Most research focuses on improving material properties, whereas only few studies concentrate on changing the crystallization process in order to make it less harmful.Within this last trend, recently the use of salt crystallization modifiers has been considered. Crystallization modifiers are ions or molecules that promote or inhibit crystal growth and/or change the crystal habit, thereby possibly reducing salt damage.We give in this paper experimental evidence that borax is a promising crystallization modifier for sodium sulfate and that it might mitigate salt crystallization damage when mixed in lime-based mortars. Lime-based mortars are chosen as a model system, since they are especially prone to salt crystallization damage due to their limited mechanical strength and bi-modal pore size distribution.
Original languageEnglish
Title of host publicationStructural Analysis of Historical Constructions
Subtitle of host publicationAnamnesis, diagnosis, therapy, controls
EditorsKoen Van Balen, Els Verstrynge
Place of PublicationLondon
PublisherCRC Press / Balkema - Taylor & Francis Group
Pages75-79
ISBN (Print)978-1-138-02951-4
Publication statusPublished - 2016
Event10th International Conference on Structural Analysis of Historical Constructions - Leuven, Belgium
Duration: 13 Sep 201615 Sep 2016
Conference number: 10

Conference

Conference10th International Conference on Structural Analysis of Historical Constructions
Abbreviated titleSAHC 2016
CountryBelgium
CityLeuven
Period13/09/1615/09/16

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