Journal of Forestry Research

, Volume 28, Issue 3, pp 629–636 | Cite as

Physical and mechanical properties of Klainedoxa gabonensis with engineering potential

  • K. Boakye Boadu
  • C. Antwi-Boasiako
  • K. Frimpong-Mensah
Original Paper
  • 76 Downloads

Abstract

Adequate information is sparse for many tropical timbers on their engineering applications, which make their international promotion difficult. The physical and mechanical properties of Klainedoxa gabonensis Pierre ex Engl. (a lesser-utilized species) and Entandrophragma cylindricum were compared. K. gabonensis contained more moisture with greater density at 12 % moisture content than E. cylindricum and had a tangential–radial ratio for swelling and shrinkage of 1.31–1.38 and 1.58–1.63, respectively, within acceptable thresholds for engineering/structural timbers. For K. gabonensis, shear parallel to grain was 32.2 ± 0.4–33.5 ± 1 N mm−2; compressive parallel to grain, 80.7 ± 1.4–90.6 ± 1 N mm−2; modulus of rupture, 204 ± 4.0–214 ± 4.0 N mm−2 and modulus of elasticity, 28,932 ± 664–29,493 ± 822 N mm−2. These properties were superior to those of E. cylindricum [(15.5 ± 0.9)–(15.6 ± 0.6), (56.4 ± 4.5)–(63.6 ± 1.2), (99.4 ± 4.7)–(121.3 ± 10.6), and (9987.4 ± 207)–(10,051 ± 258) N mm−2, respectively] and compared well with those of several traditional timbers for construction and furniture production. Its use would contribute to minimize pressure on the primary timbers in the forests and widen the raw material base for wooden products.

Keywords

Density Dimensional stability Timber engineering Mechanical property Tangential–radial ratio Traditional timber 

Notes

Acknowledgments

We thank the staff from the Juaso Forest Services Division (FSD) of the Forestry Commission (FC) of Ghana (for the supply of the wood samples), Chemistry Laboratory and Wood Workshop of the Department of Wood Science & Technology, KNUST, Kumasi-Ghana (for sample preparation and testing physical properties) and Forest Products, Trade and Marketing Division of the Forest Research Institute of Ghana (FORIG), Kumasi (for determining strength properties). We also appreciate the statistical advice by Mr. Eric Owusu Danquah (Statistician, Crops Research Institute of Ghana, CSIR, Kumasi).

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Copyright information

© Northeast Forestry University and Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  • K. Boakye Boadu
    • 1
  • C. Antwi-Boasiako
    • 1
  • K. Frimpong-Mensah
    • 1
  1. 1.Department of Wood Science & Technology, Faculty of Renewable Natural ResourcesKwame Nkrumah University of Science & TechnologyKumasiGhana

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