Browsing by Author "Babatunde, O.Y."
Now showing 1 - 2 of 2
Results Per Page
Sort Options
Item DEVELOPMENT OF STRENGTH CLASSES FOR TWO SELECTED NIGERIAN TIMBER SPECIES BASED ON BS 5268:2002 AND NCP2:1973(WEBSJOURNAL OF SCIENCE AND ENGINEERING APPLICATION, 2018) Jimoh, A.A.; Fatolu, A.S.; Rahmon, R.O.; Babatunde, O.Y.Broad range of research works have been carried out over the past few years and these have resulted in comprehensive information on materials properties of various species of timber in Nigeria. There is still research gap to cover many useful but unpopular timber species, therefore this research work is meant at characterising two commonly used timber species in Nigeria; Isoberlinia doka (Babo/Doka) and Anogeissus leiocarpus (Ayin) for structural use as well as comparing their properties with other known timber species. The logs of wood used were obtained from Irewolede Sawmill, from where tests specimen were prepared in accordance with BS 373:1957. A total of 240 test specimens were prepared from the timber species and Laboratory tests were carried out on these specimens using 100 kN Universal Testing Machine (UTM) at the National Centre for Agricultural Mechanization (NCAM), Ajase Ipo Road, Ilorin, Kwara State, to determine some of the physical and mechanical properties of the timber species. The strength properties tested includes: bending strength (MOR), modulus of elasticity (MOE), tensile strength, shear strength, compression strength (both parallel and perpendicular to grain) and cleavage strength while the physical properties tested include moisture content, specific gravity, and density. The results obtained show that the timber species are hardwood of higher strength classes (between strength classes D30 – D70) when compared with BS 5268:2002 whereas, Ayin is stronger than Babo timber species according to NCP 2:1973.Item Strength Characterization and Grading of Eku (Brachystegia eurycoma) Timber grown in Kwara State, Nigeria in accordance to BS 5268(Department of Civil Engineering, University of Ilorin, Ilorin, Nigeria, 2017) Rahmon, R.O.; Jimoh, A.A.; Babatunde, O.Y.; Tazou, O.L.Strength grading of timber offers a number of advantages both to the designer and the supplier of timber. This study reveals characterization and grading of Nigerian grown Eku (Brachystegia eurycoma) timber using BS 5268 (2002). Specimens used in the experiment were obtained from sawmills in Kwara State, Nigeria. The samples were seasoned naturally for seven months and prepared according to British Standard BS 373 (1957) Methods of Testing Small Clear Specimen of Timber. Test carried out on the prepared specimens were bending, tension, compression and shear parallel to grain, compression perpendicular to grain, moisture content and density. The timber properties determined were adjusted to the values at 12% and 18% moisture content in conformity with BS 5268 (2002) and NCP 2 (1973) for application in the Northern part of Nigeria. All the results were analyzed statistically. Eku has an average moisture content of 11.78% and mean air-dried density of 1148.25kg/m3. The Basic and grade stresses were computed using experimental failure stresses. The material properties showed that, Eku (Brachystegia eurycoma) can be graded and assigned to strength class D40. Therefore Eku timber has been successfully characterized and graded in accordance to British Standard and thereby recommended for load bearing structure like bridge beams.