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

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.

Fire Protection of Steel with Thermal Insulation Granular Plate Material on Geocement-Based

“…3 shows a graph of the furnace temperature. It should be noted that the temperature regime was maintained, no significant deviations from the standard temperature curve were recorded, which is confirmed by the data given in [1].…”

“…For this, both the fire-retardant materials themselves and design solutions based on them they created. The presented work is a continuation of the cycle of works in the field of fire protection of metal, concrete and wood structures [1][2][3][4][5], executed in SRIBM KNUCA and found their continuation in the universities of Ukraine, the Czech Republic and other countries [4][5][6][7][8]. Recently, consumers are interested in environmentally friendly fire-retardant materials based on geocement (aluminosilicate) binders [9][10][11][12][13][14], activated in the fields of hydrodynamic cavitation [15], modified with carbonate additives [16,17], as well as organomineral binders of intumescent type [18][19][20].…”

Modern Materials for Fire Protection of Reinforced Concrete Agro-Industrial Structures

“…More fire-resistant are materials based on sintered phosphate-magnesia and magnesia binders. The former provide fire protection within 3 hours [7], the latter, more than 3.5 hours [8], but the common disadvantage of these materials is the appearance of chlorine odor.…”