Determination of shear strength and fire performance of plywood supported by woven E-glass fiber

Abstract

The aim of this study was to determine the shear strength and fire performance of beech (Fagus orientalis) plywood supported (SP) by woven E - glass fiber (WGF). After providing 1.5 mm thickness beech veneers from a commercial company, they were manufactured as five layers. WGFs were placed bottom of the surface layers of plywood. Urea formaldehyde resin which contains 64% solid content was used approximately at a rate of 170 g/m². Adhesive mixture was spread on single surfaces of veneers by using roller brush. Shear strength tests were performed on the bond line 1 (contained WGF) and bond line 2 (not contained WGF) according to TS EN 314-1 as air dried and immersed in water. Fire performance tests were carried out according to ASTM E-69 by using fire tube test. SP samples have increased in reach to maximum temperature approximately three minutes. In bond line 1, shear strength values of control plywood (CP) samples have showed 7% higher shear strength properties than SP samples in air dried. In bond line 2, shear strength values of SP samples which are immersed in water have increased by 45%.