The influence of fire retardants on the properties of beech and poplar veneers and plywood

Jovan Miljkovic, Ivana Grmusa, Milanka Djiporovic, Zorica Kacarevic-Popovic
2005 Glasnik Šumarskog Fakulteta: Univerzitet u Beogradu  
Rising demands for fire resistance properties of wood construction and elements matching new standards have been an important part of building codes during the last decade. On the other side, lack of more detailed research on interaction between wood species and selected fire retardant chemicals even with basical one is evident. This is particularly truth with domestic wood species. In this research, beech and poplar veneers were immersed in 25% solutions of monoammonium phosphate (MP) and
more » ... phate (MP) and sodium acetate (SA) and impregnated for different periods of time. To determine the preliminary level of fire retardancy achieved in veneers before manufacturing of finished plywood, thermogravimetric (TG) and derivative thermogravimetric (DTG) methods were used. TG and DTG analyses of treated and untreated wood, as well as of fire retardants alone, were performed. The next properties of impregnated and nonimpregnated veneers and plywood were determined: absorption of impregnant solution (A), weight percent gain (WPG) of impregnant, equilibrium moisture content (EMC), pH values, and in the case of plywood, strength and fire resistance. Fire resistance of plywood was tested in accordance with standard test for resistance to the effects of fire and the most efficient fire retardant, monoammonium phosphate, had the same result as TG/DTG analyses, which pointed out the validity of TG methods in predicting fire resistance of future products. УТИЦАЈ УСПОРИВАЧА ГОРЕЊА НА СВОЈСТВА ФУРНИРА И СЛОЈЕВИТИХ ПЛОЧА ОД БУКОВОГ И ТОПОЛОВОГ ДРВЕТА Извод: Последњих десетак година, у складу са новим стандардима и прописима, знатно повећана је потреба за ватроотпорним дрвеним конструкцијама и елементима. С друге стране, евидентан је недостатак детаљних истраживања
doi:10.2298/gsf0592111m fatcat:fl2rbnv3grdzji6hsclngpgxqy