Determining thermal properties of gypsum board at elevated temperatures

Park, Seul-Hyun; Manzello, Samuel L.; Bentz, Dale P.; Mizukami, Tensei

doi:10.1002/fam.1017

Cited by 52 publications

(48 citation statements)

References 7 publications

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“…In order to further substantiate the correlation of the reaction temperatures with the heating rate, apart from the DSC measurements performed in this work, several DSC experimental data from the open literature were also utilized . Figure illustrates the onset, peak and endset temperatures as a function of the heating rate for the evaporation of the free moisture content reaction (Eq.…”

Section: Derivation Of the Thermal Properties Correlationsmentioning

confidence: 99%

Simplified correlations of gypsum board thermal properties for simulation tools

et al. 2014

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SUMMARYThe current work proposes for the first time an integrated set of simplified correlations for the thermal properties, i.e. effective thermal conductivity, effective specific heat and effective density, of commercial gypsum boards as a function of temperature that can be easily incorporated in dedicated computational tools in order to simulate the fire behavior of a gypsum board. The proposed correlations are based on experimental data purposely performed in the frame of this work, as well as on literature experimental data and theoretical approximations. The applicability and the accuracy of the correlations are established by simulating the fire behavior of various types of gypsum boards exposed to different fire conditions. For the validation of the developed correlations, an in-house developed code is utilized, taking into account thermal properties produced by the proposed correlations. The predictions are compared with two published sets of experimental data, as well as with one experimental data set performed in the current work. The results indicate that the proposed correlations can be reliably utilized in computational tools in order to accurately predict the fire behavior of commercial gypsum boards.

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Section: Derivation Of the Thermal Properties Correlationsmentioning

confidence: 99%

Simplified correlations of gypsum board thermal properties for simulation tools

et al. 2014

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“…Another reaction occurs around 700 °C. This reaction is believed to be the decarbonation of calcium carbonate [8, 10,11,15]. Table 1 shows the initial and residual mass fractions for the two reactions (i.e.…”

Section: Parameter Estimates Obtained With Vandevelde's Methodsmentioning

confidence: 99%

“…TGA tests were conducted at different heating rates on specimens of the core of a well-characterized fire-rated gypsum board material. Gypsum board was chosen because its behavior in fires has been studied extensively and its properties are relatively well known [7][8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Thermogravimetric Study of Dehydration and Thermal Degradation of Gypsum Board at Elevated Temperatures

Janssens¹

2011

Fire Safety Science - Proceedings of the 10th International Sym

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Over the past few years a growing number of investigators have used parameter estimation techniques based on genetic algorithms to determine material properties for pyrolysis modeling from small-scale test data. Southwest Research Institute is exploring the use of these techniques to determine material properties needed for computer modeling to predict the behavior of structures in a fire. This paper focuses on the kinetic parameters that are needed to predict dehydration and thermal degradation of gypsum board using a set of Arrhenius equations. Specimens of a Type C board were tested in a TGA apparatus in nitrogen at four heating rates; 5, 10, 20 and 60 °C/min. A more conventional approach was used instead of a genetic algorithm to determine the parameters from the TGA data. This approach is implemented on a spreadsheet and is much easier to use than optimization techniques based on genetic algorithms. In many cases it may provide a good, albeit less versatile, alternative. Initially, reactions that occur in temperature ranges that overlap were lumped into a single reaction. At the end of the paper an attempt is made to separate overlapping reactions and estimate the kinetic parameters for each of the overlapping reactions separately.KEYWORDS: gypsum board, kinetic constants, parameter estimation, modeling, TGA. NOMENCLATURE LISTING

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“…Gypsum board, also referred to as wallboard, sheetrock, or drywall, is primarily composed of calcium silicate dihydrate, which undergoes a two‐step calcination reaction releasing its free and chemically bound water when heated. The duration of the water release is critical for the fire protection provided by the gypsum board and depends strongly on the heating rate .…”

Section: Introductionmentioning

confidence: 99%

Fire resistance of cold‐formed steel framed shear walls under various fire scenarios

2019

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Summary This paper presents results of large‐scale experiments with varying levels of fire severity on lateral force‐resisting systems commonly used in cold‐formed steel framed buildings. Gypsum‐sheet steel composite panel sheathed walls, oriented strand board sheathed walls, and steel strap‐braced walls are examined. Postflashover fire conditions of two different intensities as well as 1 hour of fire exposure similar to that in a standard furnace qualification test are studied. Additionally, a full‐scale furnished kitchen fire experiment is conducted for comparison. The results highlight differences in the thermal response and subsequent performance of the walls as well as differing sensitives of the walls to pre‐damage, eg, that might occur during an earthquake. The results are part of a larger effort to provide fragilities for these wall systems in response to realistic fires for performance‐based design.

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Determining thermal properties of gypsum board at elevated temperatures

Cited by 52 publications

References 7 publications

Simplified correlations of gypsum board thermal properties for simulation tools

Simplified correlations of gypsum board thermal properties for simulation tools

Thermogravimetric Study of Dehydration and Thermal Degradation of Gypsum Board at Elevated Temperatures

Fire resistance of cold‐formed steel framed shear walls under various fire scenarios

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