Performance of Dowelled Mortise and Tenon for Tropical Timber Species under Shear Load Test | Chapter 07 | Novel Perspectives of Engineering Research Vol. 9

 Using the European Yield Models (EYM) technique, an experimental evaluation of single-dowelled mortise and tenon was done. Specimens were axially stressed in shear and dowelled using a 20.6 mm diameter mortise and tenon. The dowels are tested using steel, glass fibre reinforced plastic (GFRP), and wood as test factors. Connections were tested until they failed as the variables were altered to observe the final capacity and various modes of failure. The results show that the shear strength capacity of a single-dowelled mortise and tenon connection made of steel, GFRP, or wood does not immediately mirror the capacity of the dowel. The highest proportional limit, 5% diameter offset, and maximum connection strength are found in steel, wood, and GFRP, whereas the largest dowel yield modes are found in steel, GFRP, and wood. GFRP failure modes were found to be as rigid as steel (mode Im) when compared to wood (mode IIIs).

Author(S) Details

Rohana Hassan
Institute for Infrastructure Engineering and Sustainable Management (IIESM), Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia.

Muhd Norhasri Muhd Sidek
Institute for Infrastructure Engineering and Sustainable Management (IIESM), Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia.

Nor Hayati Abdul Hamid
Institute for Infrastructure Engineering and Sustainable Management (IIESM), Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia.

Mohd Sapuan Salit
Laboratory of Biocomposite Technology, Institute of Tropical Forestry and Forest Products (INTROP), Universiti Putra Malaysia (UPM), 43400 Serdang, Selangor, Malaysia.

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Studies on the Characterisation, Phytochemical and Functional Groups Assay of a Tropical Timber (Bombax brevicuspe) Stem | Chapter 9 | Current Research and Development in Chemistry Vol. 4

 For thermal and physico-chemical processes, the clarification of Bombax brevicuspe wood was analysed. The results obtained were as follows: afterglow time 253.67 sec, flame length 113.33 sec, flame propagation rate 20.3x10-2cm.s-1, ignition time 2.33 sec, thermal conductivity 51.34x102Umoh / cm, electrical conductivity 5.3x10-3Sm-1, ash content 3.4 percent, moisture content 29.97 percent, dry density 22.3x10-2 g.cm-3, water imbibitions (at different time intervals: 30 minutes 46.6 percent 5h, moisture content 3.4 percent, moisture content 29.97 percent, oven dry density 22.3x10-2 g.cm-3, water imbibitions) Phytochemical screening showed the existence of all secondary metabolites studied, except steroids, which showed their therapeutic ability. Fourier Transform Infrared (FTIR) and Ultraviolet ( UV) spectra indicated that 1,2,3-trisubstituted aromatic compound with attached C = O, O-H and C = N groups may be the active compound The study of chemical components indicated the presence of 43 percent cellulose, 20 percent hemicellulose, 29 percent lignin and other components in their proper proportion. Bombax brevicuspe wood could be used from the findings for different construction purposes, and due to the existence of secondary metabolites, it also presents some medicinal potential.

Author (s) Details

Dr. I. P. Udeozo
Department of Chemistry, Enugu State University of Science and Technology, Enugu State, Nigeria.

Dr. C. M. Ejikeme
Department of Chemical Science, Godfrey Okoye University, Enugu, Enugu State, Nigeria.

Prof. A. N. Eboatu
Department of Pure and Industrial Chemistry, Nnamdi Azikiwe University, Awka, Anambra State, Nigeria.

H. I. Kelle
Chemistry Unit, National Open University of Nigeria, Victoria Island, Lagos, Nigeria.

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