The effect of particle geometry and pretreatments on the strength and sorption properties of wood particle cement composite boards was investigated. Wood particles (flakes and sawdust) of Gmelina arborea were mixed with cement and water in the production of composite boards. The wood particles were pretreated with hot water, calcium chloride and a combination of both treatments to enhance bonding with cement. The slurry was poured into rectangular moulds for board formation. After demoulding, the boards formed were tested for modulus of rupture (MOR), modulus of elasticity (MOE), water absorption (WA) and thickness swelling (TS). The results revealed that the mean MOR for flakes boards was 3.23N mm-2 while the mean MOR for sawdust boards was 3.01N mm-2. Hot water and calcium chloride treatment produced the best effect in flake composite boards with MOR and MOE values of 6.90 N/mm2 and 1897.36 N mm-2 while sawdust composite boards had mean MOR and MOE values of 5.69N mm-2 and 1664.31N mm-2 respectively. The WA rate after 24 hours of flakes and sawdust boards treated with hot water and calcium chloride was 3.63% and 4.28% while the TS rate was 0.69% and 1.44% respectively. Particle geometry and pretreatments significantly improved strength and sorption properties of wood particle cement composite boards (p<0.05).
Composite boards, Particle geometry, Pretreatments, Sorption properties, Strength properties
Adefisan, O.O. (2013). Pre-treatments effects on the strength and sorption properties of cement composites made from mixed particles of Eremospatha macrocarpa canes. In: L. Popoola, F.O. Idumah, O.Y. Ogunsanwo and I.O. Azeez. (Eds). Forest industry in a dynamic global environment. Proceedings of the 35th Annual Conference of the Forestry Association of Nigeria held in Sokoto, Sokoto State, Nigeria, 11th â€“ 16th February, 2013. pp. 438 - 444.
Badejo, S.O.O. (1988). Effect of flake geometry on properties of cement-bonded particle board from mixed tropical hardwoods. Wood Sci.Technol., 22: 357-370.
Badejo, S.O.O. (1998). Influences of process variables on the properties of cement bonded particleboards from mixed tropical hardwood. Unpublished PhD Thesis, Department of Forestry and Wood Technology, Federal University of Technology, Akure.
Badejo, S.O.O., Omole, A.O., Fuwape, J.A. and Oyeleye, B.O. (2011). Static bending and moisture response of cementbonded particle Board Produced at different levels of percent chemical additive content in Board. Nigerian Journal of Agriculture, Food and Environment. 7(4): 111-120.
Bejo, L., Takats, P. and Vass, N. (2005). Development of cement bonded composite beams. Acta silv. Lign. Hung., 1: 111-119.
British Standard Institution (1989). BS 1105. Wood slabs test (type A and B). British Standards House. 2 Park ST. London, W1.
Clausen, C.A, Kartal, S.N. and Muehl, J. (2001). Particleboard made from remediated CCA-treated wood: Evaluation of panel properties. Forest Products Journal, 51(7/8): 61 - 64.
Eusebio, D.A. (2003). Cement bonded board: Todayâ€™s alternative. Technical Forum in celebration of the PCIERD 21st anniversary. Pasig City, Phillipine, pp. 23 - 45
Frybort, S., Raimund, M., Alfred, T. and Muller, U. (2008). Cement bonded composites; A mechanical Review. BioResources. 3(2): 602 - 626.
Kerade, S.R., Irie, M. and Maher, K. (2003). Assessment of wood-cement compatibility: a new approach. Holzforschung, 57 (6): 672 - 680.
Li, W., Shupe, T.F. and Hse, C.Y. (2004). Physical and mechanical properties of flake board produced from recycled CCA-treated wood. Forest Product Journal, 54(2): 89â€“94.
Miyatake, A., Fiujii, T., Hiramatsu, Y., Abe, H. and Tonosaki, M. (2000). Manufacture of wood strand-cement composite for structural use: wood-cement composites in the Asia- Pacific Region, Canberra, Australia. pp.148 - 152
Morteza N., Ebrahim, G. and Mohammed, D.G. (2011). The influence of wood extractives and additives on the hydration kinetics of cement paste and cement-bonded particle board. Journal of Applied Sciences, 11(12): 2186 - 2192.
Olorunnisola, A.O. (2007). Effect of particle geometry and chemical accelerator on strength properties of rattan-cement composites. Afr. J. Sci. Technol., 8: 22 - 27.
Olorunnisola, A.O. (2008). Effects of Pretreatment of rattan (Lacosperma secundiflorum) on the hydration of Portland cement and the development of a new compatibility index. Cement and Concrete Composites, 30 (1): 37 - 43.
Papadopoulos, A.N., Ntalos, G.A. and Kakaras, I. (2006). Mechanical and Physical properties of cement-bonded OSB. Holz Roh Werkst., 64: 517 - 518.
Rowell, R.R. (2007). Materials, chemicals and energy from biomass energy. Chapter 5: Composite materials from forest biomass: A review of current practices. Science and Technology. Oxford University Press.
Semple, K.E. and Evans, P.D. (2004). Wood cement composites-suitability of Western Australian Mallee eucalypt, blue gum and melaleucas. RIRDC/Land and Water Austrialia/FWPRDC/MDBC.
Wolfe, R.W. and Gjinolli, A. (1996). Cement-bonded wood composites as an engineering material. The Use of Recycled Wood and Paper in Building Applications, Madison, Wisconsin, pp. 84-91.
Zhou, Y. and Kamdem, D.P. (2002). Effect of cement/wood ratio on the properties of cement-bonded particle board using CCA-treated wood removed from service: Composites and Manufactured Products. Forest Products Journal. 52: 77-81.
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