Browsing by Author "Abdulqadir L.B"

Now showing 1 - 4 of 4
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    Production of Abrasive Sandpaper using Periwinkle Shells and Crab Shells
    (Published by Dhaka University of Engineering & Technology, Gazipur, Bangladesh, 2020-06-30) AMBALI IBRAHIM OWOLABI; Shuaib–Babata Y.L; Abdulqadir L.B; Ibrahim H.K; Aremu I.N; Ibraheem T.O
    In this study, the properties of periwinkle shell and crab shell grains, such as hardness, compressive strength and wear resistance were examined for their suitability as abrasive materials. The binding effect of polyester resin at high concentration was also considered. Through the process of crushing, grinding and subsequently sieving using ASTM E11 set of sieves, the shells were processed into 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 hardener respectively were developed from the grits. It was found that, with an increase in polyester resin content, the hardness 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
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    The effect of Magnesium addition on the performance of Aluminium-Zinc–Copper alloy as a sacrificial anode in seawater
    (2026-05-31) AMBALI IBRAHIM OWOLABI; Shuaib-Babata Y.L; Omokheni E.I; Busari Y.O; Abdulqadir L.B; Ejiko S.O; Ibrahim H.K; Muraina S.A
    This paper presents an experimental investigation on effectiveness of the addition of magnesium (Mg) on the performance of aluminium-zinc-copper (Al-Zn-Cu) alloy as a sacrificial anode to protect low carbon steel in seawater. The chemical compositions of mild steel sample, Aluminium alloyed and that of the medium (seawater) were determined using optical emission spectroscopy. Samples of Al-Zn-Cu alloy alloyed with 0.5%, 1.0% and 1.5% by weight of magnesium were prepared and produced by casting technique to produce the sacrificial anodes. Subsequently, the anodes were mechanically joined with the mild steel by force-fitting them together to produce specimens for corrosion test. The effectiveness of the sacrificial anodes for the protection of mild steel in seawater was examined using the gravimetric technique (for a period of 168 – 2016 hours) and potentiodynamic analysis. The results showed that the Al-Zn-Cu-1.0% Mg gave the maximum protection efficiency of 99.85% (for 2016 hours) and 99.98% through gravimetric and potentiodynamic analysis respectively, better than the efficiency of 99.26% (for 168 hours) and 99.53% (for 336 hours) attained by adding Zinc and Tin respectively to the aluminium alloy in previous studies. Thus, the addition of Mg to Al-Zn-Cu alloy was effective and suitable as a sacrificial anode in seawater
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    The Suitability of Using Environmental Waste (Polystyrene Foam, Sawdust and Eggshells) for Developing a Hybrid Composite for Ceiling Boards
    (Published by Faculty of Engineering, University of Nigeria, Nsukka, 2022-01-13) AMBALI IBRAHIM OWOLABI; Shuaib-Babata Y. L; Busari Y.O; Abdulraman S.O; Abdulqadir L.B; Ajao K.S; Aremu I.N; 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.
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    The Suitability of Using Environmental Waste (Polystyrene Foam, Sawdust and Eggshells) for Developing a Hybrid Composite for Ceiling Boards
    (Published by Faculty of Engineering, University of Nigeria, Nsukka, 2022-01-14) AMBALI IBRAHIM OWOLABI; Shuaib-Babata Y.L; Busari Y.O; Abdulraman S.O; Abdulqadir L.B; Ajao K.S; Aremu I.N; 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