Cit:Roerig-Dalgaard:2014
| Autor | Rörig-Dalgaard, I. |
| Jahr | 2014 |
| Titel | Determination of the deliquescence point in salt mixtures and in in-situ multicomponent salts with DVS equipment |
| Bibtex | |
| DOI | 10.5165/hawk-hhg/266 |
| Link | Datei:16 SWBSS-2014 Roerig-Dalgaard.pdf |
| Bemerkungen | In: De Clercq, Hilde (editor): Proceedings of SWBSS 2014. Third International Conference on Salt Weathering of Buildings and Stone Sculptures Royal Institute for Cultural Heritage, Brussels, Belgium, 14-16 October 2039, S. 223-236 |
Eintrag in der Bibliographie
| [Roerig-Dalgaard:2014] | Rörig-Dalgaard, I. (2014): Determination of the deliquescence point in salt mixtures and in in-situ multicomponent salts with DVS equipment. In: Hilde De Clercq (Hrsg.): Proceedings of SWBSS 2014 3rd International Conference on Salt Weathering of Buildings and Stone Sculptures,KIK-IRPA, Royal Institute for Cultural Heritage Brussels 223-236, 10.5165/hawk-hhg/266. |   |
Keywords[Bearbeiten]
deliquescence point, salt mixtures, second critical relative humidity, efflorescence relative humidity, DVS, critical supersaturation
Abstract[Bearbeiten]
Accelerated salt induced deterioration occurs by frequently changes across the deliquescence point. Therefore does the actual deliquescence point of the present salts have a major impact on preventive conservation being able to ensure a relative humidity not causing salt phase transition and to in-situ desalination as dissolution of the salts is the essential criterion to enable transport of salt (ions) in the construction. In the present work deliquescence points were measured with dynamic vapor sorption (DVS) equipment in salt mixtures and the results are shown to be in agreement with values from the literature. Also in-situ-multi salt samples were measured including the difference between the second critical relative humidity and the efflorescence relative humidity being a measure for the critical supersaturation required for crystallization at the specific experimental conditions. The DVS equipment seems to be able to make accurate determinations of the deliquescence points in complex salt systems and could be an expressive determination in in-situ investigations.