@article{ref1,
title="Scrutinizing Gypsum Board Thermal Performance at Dehydration Temperatures",
journal="Journal of fire sciences",
year="2011",
author="Kontogeorgos, D. and Mandilaras, I. and Founti, M.",
volume="29",
number="2",
pages="111-130",
abstract="This article investigates the thermal performance of gypsum boards in the dehydration temperature region, where pronounced chemical reactivity is anticipated. Gypsum board samples were gradually heated up to 300°C, using a low heating rate. Temperature measurements at pre-selected board locations indicated three distinct stages of gypsum dehydration; free moisture evaporation, transformation of calcium sulfate dihydrate to calcium sulfate hemi-hydrate and of calcium sulfate hemi-hydrate to calcium sulfate anhydrate. Physical properties of the gypsum board sample, that is density, specific heat, and thermal conductivity, were measured as a function of the dehydration temperature range. Results suggested that the thermal conductivity of the calcium anhydrate sulfate is higher than that of the hemi-hydrate, despite the fact that gypsum porosity increases during the dehydration process. Based on the experimental results, correlations for the thermal conductivity and the dehydration energy as a function of the mass loss during the dehydration process and the initial water content of the gypsum board, respectively, were obtained.<p />",
language="en",
issn="0734-9041",
doi="10.1177/0734904110381731",
url="http://dx.doi.org/10.1177/0734904110381731"
}