Browsing by Author "Aremu, I. N"
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Item Assessment of physico-mechanical properties of clay deposits in Asa Local Government Area of Kwara State Nigeria for industrial applications(Department of Civil Engineering, Faculty of Engineering and Technology, University of Ilorin, Ilorin, Nigeria, 2019-01-17) AMBALI, IBRAHIM OWOLABI; Shuaib-Babata, Y. L; Ibrahim, H. K; Ajao, K. S; Elakhame, Z. U; Aremu, I. N; Odeniyi, M. OAdequate information about the properties of most available clay materials in Nigeria is necessary to enhance their industrial applications. Availability of this information will adversely reduce importation of refractory materials and its products into the country, since the mineral resources are abundantly available in the country. This study evaluated the chemical and physico-mechanical properties of some selected clay deposits across the three districts of Asa Local Government Area (LGA) of Kwara State to ascertain their suitability for refractory and other industrial applications. The results revealed that the clay samples were mainly alumina-silica based with silica and alumina concentrations of 47.30 – 58.50% and 32.75 – 34.30% respectively. The physico-mechanical properties exhibited by the clay samples included: clay content (33.80-72.20%), linear shrinkage (6.10-9.80%), moisture content (21.00-33.00%), bulk density (1.99 - 2.87 g/cm3), apparent porosity (21.00-37.00%), permeability (73-94), compressive strength (213-840 N/mm2), thermal shock resistance (+29 cycles), specific gravity (2.18-2.52) and refractoriness (>1300oC). The properties were within the required standard values which make the clays suitable for insulating materials, refractories for low-medium thermal applications and manufacturing of ceramics. Though, Afon, Bakase and Ballah clay samples may require the addition of organic matter to enhance the clays’ suitability for applications that may require a higher value of porosity and permeability and low density. Effective utilization of Asa L.G.A. clays will help to domesticate the production of refractory products and enhance the establishment of Small and Medium Scale Foundry Enterprises in Nigeria in addressing the problem of unemploymentItem Inhibitive potential of prosopis africana on corrosion of low carbon steel in 1m hydrochloric acid medium(University of Engineering & Technology, Gazipur, Bangladesh, 2019-06-20) AMBALI, IBRAHIM OWOLABI; Shuaib-Babata, Y. L; Ibrahim, H. K; Ajao, K. S; Raheem, Y. A; Aremu, I. N; Pelumi, A. ARecently, there is quest for the use of inexpensive, non-toxic, non-biodegradable, readily available and environmentally acceptable corrosion inhibitor. Studies have shown that these properties could be achieved through the use of plants as inhibitor. Inhibiting effect of Prosopis Africana (Iron Tree) seed extracts were assessed on a sample of low carbon steel in 1M HCl with varying proportion of the seed extract using gravimetric, Tafel polarization and gasometrical measurement techniques. The results show that weight loss/corrosion rate decreases with increase in the extracts’ concentrations. Good inhibiting efficiency of Prosopis Africana extracts with optimum inhibiting efficiency of 97.7% at 1.0 g/l after 120 hours exposure in gravimetric measurement was attained. TAFEL polarization results revealed that the Prosopis Africana extract shows that the corrosion current density decreases with the increase in the concentration of the extract. The extract is found suitable as green inhibitor for corrosion of low carbon steel in the studied medium.Item Production of Abrasive Sandpaper Using Periwinkle Shell and Crab Shell(Dhaka University of Engineering & Technology, Gazipur, Bangladesh., 2020-06-26) AMBALI, IBRAHIM OWOLABI; Shuaib-Babata, Y. L; Abdulqadir, L. B; Ibrahim, H. K; Aremu, I. N; Ibrahim, T. OIn 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.Item Quality evaluation of commercially available steels in some selected Nigerian markets(University Politehnica Timsoara, Faculty of Engineering Hunedoara,, 2019-05-02) AMBALI, IBRAHIM OWOLABI; Shuaib-Babata, Y. L; Adewuyi, R. A; Ajao, K. S; Aremu, I. N; Ibrahim, H. K; Abdul, A. JItem Suitability of cow horn as filler in an epoxy composite(University of Port Harcourt, World Bank Assisted National Agricultural Research Programme (NARP), 2019-03-05) AMBALI, IBRAHIM OWOLABI; Shuaib-Babata, Y. L; Alasi, T. O; Aremu, I. N; Ibrahim, H. K; Abdulrahaman, S. O; Elakhame, Z. UThis study focuses on assessment of cow horn as filler in an epoxy composite. A particle-reinforced composite was developed using horn particles (HP) and epoxy resin with filler of varying percentage weight (5%, 10%, 15%, 20%. 25%, 30%, 35%, 40 %) at particle sizes of 100 and 150 μm. The composites were developed by hand lay-up technique with varying process parameters. The properties of the developed composites were examined through tensile, flexural and impact tests. The results showed that the tensile properties of the polymers reduced with the incorporation of the cow horn as filler. But at higher curing temperature, a better strength was achieved. Meanwhile, the flexural and impact properties of the polymers increased with the incorporation of the fiber in no particular order. The composite materials with particle size of 100 μm with curing temperature of 80oC exhibited higher tensile (37.58 MPa) and impact properties (74 J) than the lower particles. Generally, the cow horn was found to be a good potential filler in the composite if prepared using higher curing temperature as exhibited through its mechanical properties.Item Suitability of some selected Ado-Ekiti (Nigeria) natural moulding sands’ properties for sand casting(Faculty of Engineering, Covenant University, Ota, Nigeria, 2017-12-26) Ajao, K. S; Shuaib-Babata, Y. L; Yaru, S.S; Mohammed, G.A; Aremu, I. N; Abdulkareem, s; Ambali, I.OIn achieving accelerated and sustaining economic growth and development in Nigeria, there is need for domestication of finished goods production through sustainable industrialization. Foundry technology is one of the vital bases for rapid industrial development of any nation. Samples of moulding sand at green state were collected from four different moulding sand deposits within Ado-Ekiti in Nigeria. The samples were prepared using ASTM and British standards, while the materials’ Physico-mechanical properties were evaluated using American Foundry Society (AFS) guidelines. The results obtained from the tests were compared with the AFS’s satisfactory mould sand properties for various types of metal castings