K. Terheiden¹

1. Chair of building chemistry in Civil Engineering, Bauhaus-University Weimar, Weimar, Germany, kristina.terheiden@bauing.uni-weimar.de

ABSTRACT

Desalination by applying poultices is one of the most gentle and effective treatments. Hence it is a most favourable means for revitalisation of salt contaminated buildings. This method is based on balancing concentration gradients in the pore system filled with salt containing moisture. Initially specific gradients e.g. moisture or ion concentration are set between the pore solution of the salt contaminated specimen and the poultice to reduce the salt concentration in the specimen. However, all of these salt transport processes are only possible with at least a minimum of liquid moisture. Therefore it is necessary to know the amount of liquid and vapour moisture involved in the drying processes. Besides the quantification of liquid and vapour water it is necessary to define the influence of climatic conditions, kind and concentration of the salt solution and the liquid or vapour moisture transport.

KEYWORDS: Moisture transport, salt transport, materials

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