Browsing by Author "Abdulqadir, L. B."
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Item Production of Abrasive Sandpaper Using Periwinkle Shell and Crab Shell(Dhaka University of Engineering & Technology, Gazipur, Bangladesh, 2020) Ambali, I. O.; Shuaib-Babata, Y. L.; Abdulqadir, L. B.; Ibrahim, H. K.; Aremu, I. N.; Ibrahim, T. O.In this study, the properties of periwinkle shell and crab shell grains, such as hardness, compressive strength and wear resistancewere examinedfor their suitability as abrasive materials. The binding effect of polyester resin at high concentrationwas also considered. Through the processof crushing, grinding and subsequently sieving using ASTM E11 set of sieves, the shells were processedinto grit standards grain sizes of P40 and P60. Furthermore, by mixing and mould compression using a hydraulic press polymer matrix composite with particles varying from 96 wt.% to 92 wt.% and resin 3 wt.% to 7 wt.% with 1 wt.% each of cobalt naphthalene and methyl ethyl ketone peroxide hardenerrespectively were developedfrom the grits. It was found that, with an increase in polyester resin content, thehardness and compressive strength increased, while the wear rate decreased. The composition with 92 wt.% periwinkle shell grains to 7 wt.% polyester resin was found to be with the most improved abrasive properties.Item 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, 2022-03) SHUAIB-BABATA, YUSUF Lanre; Busari, Y. O.; Abdulraman, S. O.; Ambali, I. O.; Aremu, N. I.; Ajao, K. S.; Abdulqadir, L. B.; Arowolo, I. O.This 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) and plasma-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.