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Determination of the Fire-Retardant Efficiency of Magnesite Thermal Insulating Materials to Protect Metal Structures from Fire

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Abstract:

This paper presents the results of fire test of an I-beam protected by a combined magnesite plate-magnesite mixture heat-insulating material. It was shown that a composite with an average thickness of 37 mm maintained an average temperature of 380 °C on the metal surface after 150 minutes of fire exposure, not exceeding the critical value of 500 °C. From 60 to 100 minutes of fire testing (furnace temperature of 980-1025 °C), the temperature of the metal did not exceed 100 °C. This was achieved both due to the high thermal insulation properties of the magnesite mixture, and due to gas and vapor release from the hydration products of magnesia cement. The developed fire-retardant material provides the first group of fire-retardant efficiency (150 minutes) and, after the fire test, is characterized by density of 352.4 kg/m3 and compressive strength of 0.85 MPa, which is three times lower than the original.

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Periodical:

Materials Science Forum (Volume 1038)

Pages:

524-530

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.1038.524

Citation:

Cite this paper

Online since:

July 2021

Authors:

Sergii G. Guzii*, Yurii Otrosh, Olena Guzii, Andrii Kovalov, Konstantinos Sotiriadis

Keywords:

Fire Retardant Efficiency, Fire Test, I-Beam, Magnesite Heat-Insulating Mixture, Magnesite Plate, Metal Surfaces, Temperature

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* - Corresponding Author

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