Citation

Mélinge Y, Lanos C, Nguyen K, Daiguebonne C, Guillou O, Freslon S. J. Fire Sci. 2011; 29(4): 299-316.

Copyright

(Copyright © 2011, SAGE Publishing)

DOI

10.1177/0734904110391889

PMID

unavailable

Abstract

Gypsum materials are often used as a technical solution for passive fire protection in many civil engineering applications. In this study, the dehydration of plasterboard with large thickness, 40 mm, is studied using a one-dimensional (along the thickness) and time methodology analysis. Such materials are subjected on one side to a standard fire curve (ISO 834). The imposed heat transfer directly to the exposed face of the board induces combined actions due to the gypsum dehydration. The thermal barrier efficiency evolves significantly versus time. The local measurement of the temperature field through the sample and the local water content combined with the analysis of the local chemical structure helped us to model and analyze the dehydration processes.