Thermische Materialeigenschaften von Brandschutzmaterialien für Naturbrandbeanspruchungen.

Abstract: Thermal material properties of fire protection materials for natural fire scenarios In this paper experimental investigations regarding the thermal behaviour of selected fire protection materials (FPM) for steel elements exposed to natural fires are presented. Material properties, such as specific heat, thermal conductivity and density of FPM, have not been investigated in detail yet, especially for natural fire scenarios with different heating and cooling rates. For this purpose, experimental investigations of material properties of perlite plaster, gypsum fire protection boards and intumescent coatings will be presented. Currently, the determination of the thermal behaviour is based on investigations under the standard fire curve (ISO 834). For this approach, the thermal material properties of the FPM are not required. In addition to the standard fire design, the Eurocodes also enable a performance‐based design for a natural fire scenario. In contrast to the standard fire, which assumes a rapid and continuous rise in temperature, a realistic model of a fire (development phase, fully developed fire, cooling phase) is presented. The natural fire curve depends on fire loads, ventilation conditions and room configuration. Therefore, the properties of FPM for natural fires cannot be obtained from the standard fire tests. For the performance‐based design of protected steel components under natural fire the temperature‐dependent thermal material properties are therefore indispensable. [ABSTRACT FROM AUTHOR]