tropical hardwood; charring rate; density; fire test
Abstract :
[en] This paper describes an experimental investigation of the charring rates of timber. An experimental procedure was designed for assessing the charring rate of 20 specimens exposed to fire in a single test, with one-dimensional heat transfer conditions. Each test specimen was manufactured by gluing seven laminates together. Four thermocouples were inserted at different depths in four different laminates located in the middle of the test specimen. The test was conducted using a gas-fired furnace and specimens were exposed to the standard ISO 834 fire. In order to evaluate the fire performance of tropical hardwoods, seven different species with densities ranging from 500 to 1000 kg/m(3) were used. For the purpose of verifying the experimental procedure against existing data, two softwood species (spruce and fir) and one European hardwood species (oak) were also examined. Experimental results indicate that the test method and procedure can be used for assessing the charring rate of timber both for softwood and for hardwood species. They also show that the density of wood significantly affects the charring rate and that the values recommended in Eurocode 5 for high densities are somewhat too conservative. Copyright (C) 2004 John Wiley Sons, Ltd.
Disciplines :
Materials science & engineering
Author, co-author :
Njankouo, Jacques Michel
Dotreppe, Jean-Claude ; Université de Liège - ULiège > Département Argenco : Secteur SE > Struct. en béton
Franssen, Jean-Marc ; Université de Liège - ULiège > Département Argenco : Secteur SE > Ingénierie du feu
Language :
English
Title :
Experimental study of the charring rate of tropical hardwoods
Publication date :
2004
Journal title :
Fire and Materials
ISSN :
0308-0501
eISSN :
1099-1018
Publisher :
John Wiley & Sons, Inc, Chichester, United Kingdom
scite shows how a scientific paper has been cited by providing the context of the citation, a classification describing whether it supports, mentions, or contrasts the cited claim, and a label indicating in which section the citation was made.
Bibliography
ISO 834. Fire Resistance Tests - Elements of Building Construction. International Organization for Standardization. Geneva, 1975; 18.
ASTM E119. Standard Methods of Fire Tests of Building Construction and Materials. American Society for Testing and Materials: Philadelphia, PA, 1983.
König J, Walleij L. One-dimensional Charring of Timber Exposed to Standard and Parametric Fires in Initially Unprotected and Postprotection Situations. Swedish Institute for Wood Technology Research: Stockholm. Report I. 1999; 48.
Schaffer EL. Charring Rate of Selected Woods Transverse to Grain. Research paper FPL 69. Forest Products Laboratory: Madison, WI. 1967; 22.
White RH. Charring Rates of Different Wood Species. Ph.D. dissertation. Madison University of Wisconsin: Madison, WI. 1988; 215.
Collier PCR. Charring Rates of Timber. Study report. Branz: New Zealand, 1992; 34.
Fredlund B. A Model for Heat and Mass Transfer in Timber Structures During Fire - A Theoretical, Numerical and Experimental Study. Report, Lund Institute of Science and Technology: Sweden, 1988; 93.
ENV 1995-1-2. Eurocode 5 - Design of Timber Structures - Part 1-2: General Rules - Structural Fire Design. European prestandard. CEN: Brussels, 1994; 43.
NBN 713-020. Fire Resistance of Building Construction Elements. Belgium Institute of Standardization: Brussels, 1968; 32.
EN 408. Timber Structures - Structural Timber and Glued Laminated Timber - Determination of Some Physical and Mechanical Properties. European Standard. CEN: Brussels, 1995; 21.
This website uses cookies to improve user experience. Read more
Save & Close
Accept all
Decline all
Show detailsHide details
Cookie declaration
About cookies
Strictly necessary
Performance
Strictly necessary cookies allow core website functionality such as user login and account management. The website cannot be used properly without strictly necessary cookies.
This cookie is used by Cookie-Script.com service to remember visitor cookie consent preferences. It is necessary for Cookie-Script.com cookie banner to work properly.
Performance cookies are used to see how visitors use the website, eg. analytics cookies. Those cookies cannot be used to directly identify a certain visitor.
Used to store the attribution information, the referrer initially used to visit the website
Cookies are small text files that are placed on your computer by websites that you visit. Websites use cookies to help users navigate efficiently and perform certain functions. Cookies that are required for the website to operate properly are allowed to be set without your permission. All other cookies need to be approved before they can be set in the browser.
You can change your consent to cookie usage at any time on our Privacy Policy page.