Experimental study of fire resistance of suspended ceiling made with application of gypsum non-combustible boards
DOI:
https://doi.org/10.33408/2519-237X.2023.7-1.13Keywords:
fire resistance, fire protection, fire tests, fire-resistant suspended ceiling, standard fire, gypsum board, temperature-time dependence, destructionAbstract
Purpose. To develop a typical sample of a fragment for full-scale tests with fire from below (from the side of the room) based on the analysis of technical solutions used for the installation of fire-resistant suspended ceilings using gypsum boards. To carry out fire tests and determine the fire resistance of the experimental sample, to obtain temperature-time dependences for local points of the tested fragment, which are most susceptible to destruction and deformation as a result of heating.
Methods. The analysis of the results of existing research and methods to achieve research goals. The development of a type sample for testing in accordance with the requirements of STB EN 1363-1-2009, STB EN 1364-2-2009. The development of a methodology for determining the temperature-time dependences during heating for local points of a sample of a fire-resistant suspended ceiling. Experimental fire research.
Findings. A fire-resistant suspended ceiling using non-combustible gypsum boards is the simplest and most common solution for increasing the fire resistance of horizontal floor and roof elements. To confirm the technical solutions used for the installation of fire-resistant suspended ceilings using gypsum boards, a typical experimental sample was developed. Fire-resistant suspended ceiling formed by two continuous layers of non-combustible gypsum boards Gyproc Fire brand with a total thickness of 25 mm, and two layers of mineral wool ISOVER 50/E/K brand hsving the density of 14 kg/m3 and total thickness of 100 mm on a supporting two-level frame from thin-walled profiles corresponds to the fire resistance limit EI 60 (a←b) according to STB EN 1364-2-2009. The average temperature on the unheated surface of mineral wool boards was 170 °C at 65th minute of testing.
Application field of research. The results of fire tests can be used in numerical simulation of the heating of a fire-resistant suspended ceiling under high-temperature exposure, as well as in practice as a fire protection solution for building structures.
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