Fireproof analysis for timber elements for coatings performed by a surface impregnation method
Students Name: Derkach Nataliia Vasylivna
Qualification Level: magister
Speciality: Civil Safety
Institute: Institute of Civil Engineering and Building Systems
Mode of Study: part
Academic Year: 2020-2021 н.р.
Language of Defence: ukrainian
Abstract: Derkach N.V., Bilinskyy B.O. (supervisor). Fireproof analysis for timber elements for coatings performed by a surface impregnation method. Master’s thesis. – Lviv Polytechnic National University, Lviv, 2020. Extended abstract. Along with many of the advantages of wooden structures, a significant disadvantage of such structures is their fire resistance. Protecting wooden structures with modern fire-retardant materials (flame retardants) makes it possible to solve this failing. Among the variety of modern fire retardants it is not always possible to choose the most optimal in terms of price and technical characteristics. The main task of flame retardants is to reduce the rate of wood charring, which reduces the cross section of the wooden element. The saturation of the construction market is so fast that information about the work of these materials is not enough. Therefore, the issue of analysis of the work and selection criteria of modern flame retardants for wooden structures is a relevant and important task. The practical significance of the work is to determine the effectiveness of modern flame retardants in real fire conditions. The first chapter analyzes the literature on the charring of wooden structures and the main theoretical relationships. There are also methods of fire protection of wooden structures to reduce the rate of charring of wood. The second section presents the method of experimental research, design and equipment of the fire furnace, the method of samples preparation. The third section presents the results of experimental and theoretical research. The investigated depths of charring of wooden elements after treatment with flame retardants of different types are presented. The fourth section presents a technical and economic comparison of two options for flame retardant treatment. The most economically optimal types of fire protection are determined. Study object: the rate of charring of unprotected and flame retardant wood. Subject of research: flame retardants for wooden structures. Scope of research: flame retardants for wooden structures. Goal of research: analysis of the effectiveness of flame retardants of wooden structures under conditions of high temperature exposure by comparing the rate of charring of wood impregnated with the studied flame retardants. In this master’s qualification work, the rate of charring of wood under the action of temperature is analyzed. The basic means and methods of fire protection of wood are given and the market analysis of modern flame retardants applied by impregnation is analyzed. A method for conducting experimental studies of the effectiveness of flame retardants on wood samples has been proposed. According to the results of technical and economic comparison, the given costs were determined for two options - without fire protection and with fire protection. Keywords: temperature, fire protection, surface impregnation, wooden elements. References. 1. EN 1991-1-2(2002)/Eurocode 1:Actoins and structures. Part 1-2 ; Generals actions on structures exposed and fire. 2. Lu W.,Makelainen P. Advanced steel structures. Structures fire design / Helsinki university of technology laboratory of steel structures publications 29-Espoo,2003 3. Shnal TM..2006.Fire resistance and fire protection of wooden structures: Textbook. manual - Lviv: Lviv Polytechnic National University Publishing House 2006.-220p.Sh76 4. Leong Poon J.P. Literature review on the contribution of fire resistant timber construction to heat release rate/ Warrington fire research. WFPA Project №20633. Version 2b.-78p. 5. Lie T.T. A method of assessing the fire resistance of laminated timber beams and columns /Canadian J. jf Civil Eng 4:161 -169. 1977 6. Schaffer E.L. Structural fire design:Wood/USDA Forest Serv.Res.Pap.FPL 450. 1984- 17p.