Experimental-computing technique of evaluating thermophysical properties of building materials with a muffle electric furnace for solving fire resistance problems
DOI:
https://doi.org/10.33408/2519-237X.2020.4-1.5Keywords:
fire resistance, thermal properties, coefficient of thermal conductivity, specific heat, density, experimental studies, finite element method, parametric optimization, standard temperature regimAbstract
Purpose. Based on experimental studies and theoretical data to develop a technique for thermal properties evaluation of a cement-reinforced and mineral wool specimens under high temperature for fire resistance problems solving.
Methods. Finite element methods, parametric optimization, experimental studies.
Findings. The experimental-computing technique has been developed and experimental studies have been carried out on heating the test materials within the boundaries of the standard fire temperature-time curve: in stationary thermal conditions at temperatures of 275, 550, 770 and 1150 °C; in transient thermal conditions at temperatures from 20 to 1000 °C. Computational finite-element models have been developed, boundary (initial and boundary) conditions have been formulated, with the use of the parametric optimization methods, the thermal properties at high temperatures of cement-reinforced and mineral wool specimens have been determined for the fire resistance problems solving.
Application field of research. The results can be used to solve the fire resistance problems for building structures based on mineral insulation and cement-reinforced slabs, as well as to determine the thermal properties of other building materials at high temperatures.
References
Kudryashov V.A., Botyan S.S. Teploprovodnost' tsementnykh armirovannykh plit pri nestatsionarnom teplovom rezhime na osnove dannykh eksperimental'nykh issledovaniy i chislennogo modelirovaniya [Cement boards thermal conductivity based on experimental research and numerical simulation data in relation to nonstationary heat flows]. Journal of Civil Protection, 2017. Vol. 1, No. 2. Pp. 139–152. (rus). DOI: 10.33408/2519-237X.2017.1-2.139.
Lykov A.V. Theory of heat conduction. Moscow: Higher School, 1967. 600 p.
Kudryashov V.A., Botyan S.S., Danilova-Tret'yak S.M., Nikolaeva K.V. Teplofizicheskie kharakteristiki tsementnykh armirovannykh plit dlya resheniya zadach nestatsionarnogo vysokotemperaturnogo nagreva [Сement boards thermophysical characteristics for solving the tasks of nonstationary high-temperature heating]. Journal of Civil Protection, 2018. Vol. 2, No. 3. Pp. 327–334. (rus). DOI: 10.33408/2519-237X.2018.2-3.327.
Schleifer V. Zum Verhalten von raumabschliessenden mehrschichtigen Holzbauteilen im Brandfall [For the behaviour of room-closing multi-layer wood components in case of fire]: Dissertation ETH Nr. 18156. Zürich, 2009. 147 s. (deu)
Published
How to Cite
License
Copyright (c) 2020 Botyan S.S., Zhamoydik S.M., Kudryashov V.A., Nguen T.K.
CC «Attribution-NonCommercial» («Атрибуция — Некоммерческое использование») 4.0
