Water Absorption Properties of Some Tropical Timber Species
Journal of Energy and Natural Resources
Volume 3, Issue 2, April 2014, Pages: 20-24
Received: May 15, 2014; Accepted: Jun. 5, 2014; Published: Jun. 20, 2014
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Author
Emmanuel Tete Okoh, Department of Furniture Design and Production, Accra Polytechnic, P O Box GP 561, Accra, Ghana
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Abstract
The water absorption characteristics during soaking of Terminalia superba ( Ofram), Terminalia ivorensis (Emere) as currently threatened timber species and Quassia undulata ( Hotrohotro) and Recinodendron heudelotii.(Wama) as lesser used timber species were studied to determine and compare their absorption and diffusion coefficients as potential substitutes for utilization. Water soaking was carried out for nineteen days and the data were fitted into the Fick’s model to determine both the water absorption and diffusion coefficients. The study showed that, the mean values of the water absorption coefficient at initial stages of moisture sorption for Hortrohotro, Ofram, Emere and Wama were 3.51x 10-3, 4.31x10-3, 1.67x10-3 and 8.27x10-4 (kg/m2/s) respectively. The corresponding mean values of this parameter for the entire soaking process were also determined for the timber species viz; Ofram (2.91x 10-3), Hortrohotro (2.58x 10-3), Emere (1.14x 10-3) and Wama (6.11x 10-4) kg/m2s respectively. The measured diffusion coefficient for Wama, Emere, Ofram and Hotrohotro timber species were 9.637x10,-4 6.694x10-3 4.185x10-2 and 2.899x10-2 kg/m2/s respectively. Emere and Wama had lower absorption and diffusion characteristics than Hortrohotro and Ofram. Based on this study, Wama could be substituted for Emere and Hortrohotro with Ofram.
Keywords
Absorption, Diffusion, Fick’s Law, Sorption
To cite this article
Emmanuel Tete Okoh, Water Absorption Properties of Some Tropical Timber Species, Journal of Energy and Natural Resources. Vol. 3, No. 2, 2014, pp. 20-24. doi: 10.11648/j.jenr.20140302.12
References
[1]
U. Watanabe, Y. Imamura and I. Iida, Liquid penetration of pre-compressed wood VI: Anatomical characterization of pit fractures. J. Wood Sci. 44: 158-162, 1998.
[2]
S. Leal, V.B. Sousa, and H. Pereira., Radial variation of vessel size and distribution in cork oak wood (Quercus suber L.). Wood Sci. Technol. 41: 339-350, 2007.
[3]
Y. Sano, Intervascular pitting across the annual ring boundary in Betula platyphylla var. japonica and Fraxinus mandshurica var. japonica. IAWA J. 25: 129 140, 2004.
[4]
J. Virta,, S. Koponen and I. Absetz., Modeling moisture distribution in wooden cladding board as a result of short-term single-sided water soaking. Building Environ. 41: 1593-1599, 2006.
[5]
W.B. Banks, Some factors affecting the permeability of Scots pine and Norway spruce. J. Inst. Wood Sci. 5 , 10 – 17,1970.
[6]
Y. FortinMoisture content-matric potential relationship and water flow properties of wood at high moisture contents. PhD thesis, University of British Columbia, Vancouver. 1979 Strømdahl, K., (2000). Water sorption in wood and plant fibres (Series R, No. 78). Department of Structural Engineering and Materials, Technical University of Denmark
[7]
C. Hansmann,, Gindl, W., Wimmer, R. and Teischinger, A., Permeability of wood – a review. Wood Res. Drevarsky Vysk. 47, 1 – 16, 2002.
[8]
G. Bramhall, The validity of Darcy’s Law in the axial penetration of wood. Wood Sci. Technol. 7, 319 – 322, 1971.
[9]
A.B. Wardrop, and Davies, G.W., Morphological factors re-lating to the penetration of liquids into wood. Holzforschung 15, 129 – 141, 1961.
[10]
T. Rypstra, Analytical techniques for the evaluation of wood and wood fi nishes during weathering, Ph.D. Thesis, University of Stellenbosch, 1995. and Rijsdijk,J.F, P.B., Laming, (1994). Physical and related properties of 145 timbers, Kluwer Academic Publishers, Dordrecht
[11]
C. F Siau, Wood: Influence of moisture on physical properties. Blacksburg, Virginia Polytechnic Institute and State University, 1995.
[12]
L.A. Smith, and W. A. Cote., Studies of penetration of phe-nol-formaldehyde adhesive into beech wood. Wood Fiber Sci. 3(1):56–57, 1971.
[13]
M. Sernek, J. Resnik, and F. A. Kamke, Penetration of liquid urea-formaldehyde adhesive into beech wood. Wood Fiber Sci. 31(1):41–48, 1999.
[14]
C. Skaar, Water in wood. Syracuse University Press, 1972. Syracuse, N.Y.
[15]
R. D. Preston, The physical biology of plant cell walls. 1974, Chapman and Hall, London
[16]
A. Eckeveld van, Homan, W.J. and Militz, H., Increasing the water repellency of Scots pine sapwood by impregnation with undiluted linseed oil, wood oil, coccos oil and tall oil. Holzforsch. Holzverwert. 53, 113 – 115, 2001.
[17]
R. Baronas, Ivanauskas F., Juodeikienė I., Kajalavicius A.,– Modelling of Moisture Movement in Wood during Outdoor Storage. Nonlinear Analysis: Modelling and Control, 2, 3-1, 2001.
[18]
L. Candanedo, Derome, D., - Numerical simulation of water absorption in soft-wood. Ninth International IBPSA Conference , 2005. Montréal, Canada
[19]
C.C. Gerhards, - Effect of moisture content and temperature on the mechanical properties of Wood: an analysis of immediate effects. Wood and Fiber Science, 14, 154-163,1998. Obataya, E, Norimoto, M, Gril, J., (1998) - The effects of adsorbed water on dynamic me-chanical properties of wood. Polymer, 39(14), 3059-3064 and Severa L., Buchar J., Krivanek I., (2003) - The influence of the moisture content on the fracture of the notched wood beam. 8th International IUFRO Wood Dry-ing.
[20]
B.A. Bendtsen, - Sorption and swelling characteristics of salt-treated wood. U. S. Forest Service Research Paper FPL 60, 1966.
[21]
R. Baronas, Ivanauskas F., Juodeikienė I., Kajalavicius A.,– Modelling of Moisture Movement in Wood during Outdoor Storage. Nonlinear Analysis: Modelling and Control, 2, 3-1, 2001.
[22]
M. Krus. Moisture Transport and Storage Coefficients of Porous Mineral Building Materials. Theoretical Principles and New Test Methods,1996. Fraunhofer IRB Verlag. Germany, 106 p. plus appendix
[23]
N.E. Marcovich, M.M. Reboredo, M.I. Aranguren, Moisture diffusion in polyester– wood flour composites. Polymer 40, 7313–7320, 1999.
[24]
A. Kumar, P.C., Flynn - Uptake of fluids by boreal wood chips: Implications for bioenergy. Fuel Processing Technology 87, 605–608, 2006.
[25]
J. Khazaei, Water absorption in three wood varieties. Cercetări Agronomice în Moldova,2008.Vol. XLI , No. 2 (134).
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