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Charring rate of timbers in terms of size, layer material and fire class evaluated by the Taguchi method

  • Mustafa Altin
Published/Copyright: April 14, 2015
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Abstract

This publication is focused on the fire performance of different wood materials to determine the charring rate. For this purpose, L27(313) Taguchi orthogonal design was used for the derivation of the parameter combinations. A total of 108 timber specimens made of 3 different natural timber types having 3 different sizes had been coated with fire retardant varnish and boron impregnation. Specimens were tested for three different fire classes and temperatures. The values of charring rate were obtained from fire tests according to the orthogonal design. Obtained results were analyzed using the signal-to-noise ratio, analysis of variance methods and 3D surface plots. It was concluded that the type of timber and specimen section are the most significant factors affecting the charring rate. The second significant factor affecting the charring rate was found to be the duration and temperature of fire. Lastly, coating material is the third important factor influencing the charring rate.

Kurzfassung

Die diesem Beitrag zugrunde liegende Studie konzentriert sich auf die Feuerbeständigkeit von verschiedenen Holzwerkstoffen unter Bestimmung der Verkohlungsgeschwindigkeit. Zu diesem Zweck wurde das orthogonale L27(313) Taguchi-Design zur Ableitung der Parameterkombinationen gewählt. Eine Gesamtzahl von 108 Holzproben wurde aus drei verschiedenen Naturholzarten hergestellt, die drei verschiedene Größen hatten und mit einem Feuerschutzlack und Borimprägnierung beschichtet wurden. Die Proben wurden für drei verschiedene Feuerschutzklassen und Temperaturen geprüft. Die Werte für die Verkohlungsrate wurden in Brandversuchen ermittelt, die entsprechend des orthogonalen Designs ausgelegt wurden. Die so gewonnenen Ergebnisse wurden mittels Signal-Rauschabstand, Methoden der Varianzanalyse und 3D-Oberflächenplots analysiert. Daraus wurde gefolgert, dass die Holzart und der Probenabschnitt die wichtigsten Einflussfaktoren auf die Verkohlungsrate darstellen. Als zweiter signifikanter Einfluss hinsichtlich der Verkohlungsgeschwindigkeit stellten sich die Dauer und die Temperatur des Feuers heraus. Schließlich stellte sich heraus, dass die Beschichtung des Werkstoffs der drittwichtigste Faktor mit Einfluss auf die Verkohlungsrate ist.


§Correspondence Address, Asst. Prof. Dr. Mustafa Altin, Selcuk Universitesi Teknik Bilimler M.Y.O., 42070 Selcuklu, Konya, Turkey, ,

Assist. Prof. Dr. Mustafa Altin, born in 1972, received his BSc in Technical Education in 1993, his MSc in Computer Technology in 2003 and his PhD in Civil Engineering in 2008. He has been Assistant Professor at Selcuk University, Turkey, since 2000.


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Published Online: 2015-04-14
Published in Print: 2015-03-02

© 2015, Carl Hanser Verlag, München

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