Wood species, wood-cement ratio and curing accelerator types are the major factors effecting properties of wood-cement composites. This paper investigates the effects of wood-cement ratios and cement curing accelerator types on some properties of cement bonded particleboards (CBPBs) from Nordmann fir [Abies nordmanniana (Stev.) Spach. subsp. Nordmanniana]. A total eight groups of the experimental boards with 1200 g/cm3 target density and 10 mm thickness were produced by using three curing accelerator types [Al2(SO4)3, CaCl2 and FeCl3] and two wood-cement ratios (1/2 and 1/3 by weight). The curing accelerators were used at 5% ratio of cement weight for all the boards. physical (density, water absorption and thickness swelling), mechanical (modulus of elasticity, modulus of rupture, internal bonding strength and screw withdrawal strength) of the boards and decay resistance (brown rot fungi) properties were determined according to EN323, ASTM D1037, EN 317, EN 310, EN 319, EN 320 and EN 113, respectively. The results show that the better mechanical and physical properties were obtained from the boards with 1/3 wood-cement ratio and CaCl2. On the other hand, the fungi failed to attack the cement-bonded particleboards.

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