FRAGMENTARY ILLUMINATION OF RESULTS OF FIRE TEST OF WOODEN BEAMS WITH FACING BY FIRE-RETARDANT PLYWOD

S. V. Pozdieiev; Y. Zmahа; М. Zmahа

S. V. Pozdieiev Cherkasy Institute of Fire Safety named after Chornobyl Heroes of National University of Civil Defence of Ukraine
Y. Zmahа Cherkasy Institute of Fire Safety named after Chornobyl Heroes of National University of Civil Defence of Ukraine
М. Zmahа Cherkasy Institute of Fire Safety named after Chornobyl Heroes of National University of Civil Defence of Ukraine

Keywords: combustion reaction mechanism, fire protection, humidity, control of fire-retardant efficiency

Abstract

This article highlights the current issues of ensuring fire resistance of wooden beams as load-bearing structures. Scientists have studied various types of fire protection of wood from fire. The existing methods of fire protection include fire-retardant impregnating materials, fire-retardant paint, fire-retardant coatings sold. At the same time, research was conducted to create fire-retardant materials. Therefore, in the field of our research there is a question of using fire-retardant plywood as a facing fire-retardant method of protection of wooden structures. This article describes the process of manufacturing fire-retardant plywood. Which is made of 2 mm veneer sheet, which is impregnated with flame retardant. According to the method of the technological bath and glued in a pressed machine to the appropriate thickness. Then in the experimental setup fire tests were performed at standard temperature in three time intervals of 15 minutes, 30 minutes and 60 minutes, highlighting these results in the form of graphs of temperature versus exposure time. Which in turn serve as a basis for determining the rate of charring, as well as determining the range of dependence of the side and end layer of charring on the exposure time for 10 mm and 20 mm layer of refractory plywood. Thus, the research allows us to draw conclusions about the effectiveness of the proposed method of fire protection of wooden structures with fire-retardant plywood and to determine the calculated class of fire resistance for these structures.