The paper examined the strength of rotationally welded joints between untreated beech dowels and samples thermally modified unmodified oak wood (used as substrates). results were compared with control group where glued using PVAc (polyvinyl acetate) glue for same types samples. Maximum dowel pull-out force was significantly higher connection to in both groups - treated wood. Welded joint group,...

Abstract The wood-water interactions of modified beech wood ( Fagus sylvatica L.) were studied. Specimens thermally at 180 (TM 1 ), 200 2 ) and 220 °C 3 acetylated (Acet), melamine formaldehyde (MF) resin (Mel) modified. Afterwards, the water vapour characteristics, i.e. sorption isotherms, equilibrium moisture content (EMC), dimensional stability specimens conditioned 30, 65 90% RH liquid abso...

fracture of mixed mode i/ii in beech wood and its wood polymers has been investigated experimentally in this study. hence, two crack systems of tl and rl were selected in which the crack planes extend along the wood fibers. this investigation has demonstrated that onset of mixed mode cracking can be predicted with a very simple fracture criterion in these crack systems. results indicated that f...

this research was conducted to investigate the effect of acetylation on weathering resistance of solid wood and particleboard produced from acetylated particles of fagus orientalis. after 12 hours soaking in acetic unhydride, in order to achieve three levels of weight gain, 5, 9 and 16%, acetylated particles of bech wood were heated in oven at 120oc for 30, 90 and 240 minutes, respectively. als...

Beech (Fagus orientalis Lipsky) forests in Iran are one of the most important sources hardwood species used for lumber, furniture, and interior object design due to its hardness, wear resistance, strength, excellent bending capabilities. Furthermore, is third country walnut wood production after China United States. Therefore, this study, we compared specific mechanical properties between beech...

PREMISE OF THE STUDY Gravitropic movements are unexpected mechanical processes that could disturb tree design allometries derived from the physics of nonliving bodies. We investigated whether the scaling law of gravitropic performance (power of -2 of stem diameter) derived from integrative biomechanical modeling is disturbed by ontogeny or environment, then discuss the silvicultural and dendroe...

In the present study, different activated carbons were prepared from carbonized African beech wood sawdust by potassium hydroxide activation. The activated carbons were characterized by brunauer–emmett–teller, scanning electron microscope, fourier transform infrared spectroscopy, and thermogravimetric analyzer. The phenol adsorption capacity of the prepared carbons was evaluated. The d...

BACKGROUND The valorization of biomass for chemicals and fuels requires efficient pretreatment. One effective strategy involves the pretreatment with ionic liquids which enables enzymatic saccharification of wood within a few hours under mild conditions. This pretreatment strategy is, however, limited by water and the ionic liquids are rather expensive. The scarce understanding of the involved ...