Browsing by Author "AJAO, K. S."
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Item IMPACTS OF COVID-19 PANDEMIC ON NIGERIA’S ECONOMY: EFFECTIVE FOUNDRY TECHNOLOGYAS A SUSTAINABLE SOLUTION(Faculty of Engineering, “Dunarea De Jos” University of Galati Romania, 2022-03-15) SHUAIB-BABATA, Yusuf Lanre; Busari, Y. O.; MAHAMOOD, R. M.; YARU, S. S.; ABDULQADIR, L. B.; AMBALI, I. O.; AJAO, K. S.; ABDULRAMAN, S. O.This study considered the effect of the Covid-19 pandemic ontheeconomy of Nigeria and investigated the effective application of foundry technology to proffer a sustainable solution to the problem. Domestication of production of motorcycle components, being a significant means of transportation that is required for the development of any society was considered. Aluminium scraps from a waste dump and Belle and Oyun natural moulding sands in Kwara State, Nigeria, which have been previously recommended for non-ferrous casting in previous studies were considered and used for casting of motorcycle/tricycle parts (centre stand and brake pedal) using AFS guidelines. The scraps’ chemical compositions were analysed. Thereafter, some mechanical properties with the microstructure of the aluminium casts and that of commercially obtained imported types were examined using appropriate ASTM standards. Cast aluminium alloy produced using scrap had no casting defects and had some mechanical properties comparable to those available on the markets (imported). Thus, effective usage of naturally available moulding sands in Nigeria for foundry applications would help to proffer sustainable solutionsto the nation’s economic problem as a result of the adverse effects oftheCovid-19 pandemicItem The Suitability of Using Environmental Waste (Polystyrene Foam, Sawdust and Eggshells) for Developing a Hybrid Composite for Ceiling Boards(FACULTY OF ENGINEERING, University of Nigeria, Nsukka, Nigeria (UNN), 2022-01) SHUAIB-BABATA, Yusuf Lanre; Busari, Y. O.; ABDULRAMAN, S. O.; ABDULQADIR, L. B.; AMBALI, I. O.; AJAO, K. S.; AREMU, N. I.; AROWOLO, I,OThis study considers the suitability of using environmental wastes (polystyrene foam, sawdust and eggshell) for the development of composite materials for ceiling boards. The materials were collected from dumping sites and processed accordingly. The elemental compositions of the processed sawdust and eggshell were examined using Atomic Absorption Spectrometer (ASS) andplasma-optical emission spectrometer (Optimal 3100XL Perkin Elmer) respectively. Properties of the composite samples were determined using appropriate ASTM standards (ASTM D570, C109-95, D3479, E1530 and D7336/D7336M). The results show that the composite with a mix ratio of 5% Polystyrene, 10% sawdust and 40% eggshell exhibited the most suitable properties for ceiling board production or indoor uses in building: water absorption (0.52 and 6.17% for 2 and 24hours respectively), tensile strength (2.362 N/mm2), elongation at break (0.677 mm), compressive strength (0.1575 N/mm2), energy to break (0.016 N.m) and thermal conductivity of 0.0221 W/M.K. Thus, the production of suitable ceiling board using some bio-wastes can be domesticated in Nigeria