30Nov 2016

MECHANICAL STRENGTH PROPERTIES OF MANGIFERA INDICA IN AXIAL DIRECTION AT DIFFERENT MOISTURE REGIMES.

  • Department of Forestry and Environment, Rivers State University of Science and Technology, Nkpolu-Oroworukwo, Port Harcourt, Rivers State, Nigeria.
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This study assessed the Modulus of Rupture (MOR), Modulus of elasticity (MOE) and Impact strength (IM) of Mangifera indica woods in axial direction. The dimensions of wood samples were determined in accordance to British Standard (BS) 373(1957) and samples were subjected to the oven dry method for moisture content(MC) determination at Green state (90%) and Dry basis (12% MC). The result showed that there was significant difference (P<0.05) between MOR in the green and dry bases and along axial heights. The axial variations on wet basis shows that, MOR was highest at the base with 42.30Nmm2 followed by the middle with 42.16 Nmm2 and least at the top with 19.64 Nmm2 while at 12% MC, MOR was highest at the middle with 48.59 Nmm2 followed by the top with 43.18 Nmm2 and lowest at the bottom with 43.14 Nmm2. There was significant difference (P<0.05) between the Modulus of Elasticity (MOE) in the wet and dry bases. Conversely, at their axial heights there was no significant difference (P>0.05) between stands.MOE at the wet bases along axial heights was highest at the middle (10272.3Nmm2) followed by base (8202.06 Nmm2) and least at the top (5137.71Nmm2) whereon the dry basis, MOE was highest at the base (52112.80 Nmm2) followed by middle (14070.38 Nmm2) and least at the top (9386.40 Nmm2). There was no significant difference (P>0.05) of the Impact Strength (IM) in their different moisture regimes (wet and dry bases).IM strength at the wet and dry bases was highest at the middle (1.86; 2.16 Nmm2) followed by the base (1.85; 2.51Nmm2) and least at the top (1.48; 1.52Nmm2). A comparison with other species indicates that Mangifera indica serve other utilitarian purpose apart from its fruit benefits.


[Aleru K. K. and David-Sarogoro N. (2016); MECHANICAL STRENGTH PROPERTIES OF MANGIFERA INDICA IN AXIAL DIRECTION AT DIFFERENT MOISTURE REGIMES. Int. J. of Adv. Res. 4 (Nov). 1520-1526] (ISSN 2320-5407). www.journalijar.com


Aleru, K.K., David-Sarogoro, N.


DOI:


Article DOI: 10.21474/IJAR01/2242      
DOI URL: http://dx.doi.org/10.21474/IJAR01/2242