Salt crystallization is one of the major factors of degradation of porous materials such as masonry. This paper presents a coupled multiphase model for hygrothermal analysis of masonry structures and the effective prediction of stress induced by salt crystallization. The independent variables chosen to describe all the process are: the pore humidity, the concentration of dissolved salt and the temperature. The governing equations of the model are: the moisture balance equation, expressed in function of the humidity, the conservation equation for the total stored energy, the balance equation for the dissolved salt and a kinetic expression for the salt crystallization law. The model is used to simulate the results of an extensive experimental campaign carried out on a masonry wall exposed to weather conditions for four months.

ASSESSMENT OF SALT CRYSTALLIZATION THROUGH NUMERICAL MODELLING / G. Castellazzi; S. de Miranda; L. Grementieri; L. Molari; F. Ubertini. - STAMPA. - (2013), pp. 89-96. (Intervento presentato al convegno 3rd European Workshop on Cultural Heritage Preservation tenutosi a Bolzano nel 16-18 Sept.2013).

ASSESSMENT OF SALT CRYSTALLIZATION THROUGH NUMERICAL MODELLING

CASTELLAZZI, GIOVANNI;DE MIRANDA, STEFANO;MOLARI, LUISA;UBERTINI, FRANCESCO
2013

Abstract

Salt crystallization is one of the major factors of degradation of porous materials such as masonry. This paper presents a coupled multiphase model for hygrothermal analysis of masonry structures and the effective prediction of stress induced by salt crystallization. The independent variables chosen to describe all the process are: the pore humidity, the concentration of dissolved salt and the temperature. The governing equations of the model are: the moisture balance equation, expressed in function of the humidity, the conservation equation for the total stored energy, the balance equation for the dissolved salt and a kinetic expression for the salt crystallization law. The model is used to simulate the results of an extensive experimental campaign carried out on a masonry wall exposed to weather conditions for four months.
2013
Cultural Heritage Preservation
89
96
ASSESSMENT OF SALT CRYSTALLIZATION THROUGH NUMERICAL MODELLING / G. Castellazzi; S. de Miranda; L. Grementieri; L. Molari; F. Ubertini. - STAMPA. - (2013), pp. 89-96. (Intervento presentato al convegno 3rd European Workshop on Cultural Heritage Preservation tenutosi a Bolzano nel 16-18 Sept.2013).
G. Castellazzi; S. de Miranda; L. Grementieri; L. Molari; F. Ubertini
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/178873
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