Some Physical and Mechanical Properties of &lt;i&gt;Daniellia Ogea&lt;/i&gt; Harms Green Timber Species

A Jimoh,Ab Chabi

doi:10.4314/jasem.v21i6.18

Abstract

Throughout the antediluvian and up to date, humans keep understanding the nature of wood which has been used to meet some bunches of human’s demands such as in industry, in framing and in war. This paper presents some physical and mechanical properties of Daniellia ogea (Iya) green timber specie freshly felled from matured trees in forests around Ilorin Local Government, Kwara-State, Nigeria and cut into structural sizes within the Wood workshop of University of Ilorin premises according to BS EN 408: 2003. The moisture content and the density were the physical properties tested while the mechanical properties were the modulus of rupture and the local modulus of elasticity in bending strength, the apparent modulus of elasticity, the compressive strength perpendicular to grain then the compressive strength and tensile strength parallel to grain using the Universal Testing Machine of 300kN capacity of the food laboratory of the department of Agriculture of the University. Then the basic and grade stresses were determined and found to conform to the BS 5268 codes of practice. The results obtained post-tests for the moisture content and the density had respectively average values of 140.45% and 854.67 kg/m3. Keywords: Timber, Apparent modulus of elasticity, Stresses, Bending, Density, Moisture content.

Highlights

By stressing interest in local and sustainable materials such as timber, a major step is being taken towards industrialisation and economic independence by the construction industry whose primary goal is to produce a structure that combines safety, economy and aesthetic flawlessly (Aguwa, 2013)
Timber machined for structural use has been for centuries used in the construction industry; considering several factors nowadays, the interest in structural timber has been modernized; green timber does not refer to the colour of the specie but the timber freshly felled from tree (Negro et al, 2013)
The adjustment of bending strength values to the equivalent 18% moisture content was as a result of environmental condition in Nigeria (NCP, 1972)

Summary

Introduction

By stressing interest in local and sustainable materials such as timber, a major step is being taken towards industrialisation and economic independence by the construction industry whose primary goal is to produce a structure that combines safety, economy and aesthetic flawlessly (Aguwa, 2013). The adjustment of bending strength values to the equivalent 18% moisture content was as a result of environmental condition in Nigeria (NCP, 1972).

Results

Conclusion