Improving the Fire Resistance of Heat Treated Wood by Using Environment-Friendly Substance

Abstract

The greatest risk of wood structures with many advantages is there ignition and burning. Negative property of wood can be reduced by using environmentally friendly substance. In this study, pine (Pinus sylvestris L.) wood samples were heat-treated at 210 ° C for 120 minutes after impregnation with boric acid in concentrations of 2.5% and 5%. Fire performance of the combination of boric acid (BA) and heat treatment was calculated from maximum temperature and weight loss. According to Mini Fire Tube (MFT) test results, 99,99% weight loss was observed in the control samples, while 38,36% and 52,24% weight loss were observed in 5% BA and 5% BA+Heat treatment respectively. 2.5% BA+Heat treatment and 5% BA+Heat treatment samples reached maximum weight loss in 160 seconds. While the maximum temperature increased to 444,73 ºC in 5% BA impregnated samples, it remained at 227.9 ºC in 2.5% BA + heated samples.