Browsing by Author "Ambali, I. O.,"
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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.(Journal of Research Information in Civil Engineering. Published by Department of Civil Engineering, University of Ilorin, Ilorin Nigeria., 2019-02) Shuaib-Babata, Y. L.,; Ambali, I. O.,; Ibrahim, H. K.,; Ajao, K. S.,; Elakhame, Z. U.,; Aremu, N. I.; Odeniyi, O. M.Adequate 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 unemployment.Item Characterization of Belle Natural Moulding Sand for Foundry Application.(Department of Civil Engineering, University of Ilorin, Ilorin Nigeria, 2019-02-18) Shuaib-Babata, Y. L.,; Nafiu, M. B.,; Ajao, K. S.,; Ambali, I. O.,; Elakhame, Z. U.,; Busari, O. Y.,; Ibrahim, H. K.; Aremu, N. I.There exists vast availability of natural sands which may be suitable for foundry applications in different locations Kwara State in particular and generally in Nigeria. The sands need to be identified and characterised for productive and profitable foundry practices. In this study, assessment of chemical and physicomechanical properties of the natural moulding sand in Belle community of Kwara State, Nigeria was carried out to ascertain its suitability for foundry applications. The analysis of the sand samples’ Chemical compositions were done using an XRF Analyser, while American foundry-men Society, ASTM and British standards laboratory tests procedures were adopted appropriately to determine the sand’s physico-mechanical properties. The results of chemical composition analysis showed that SiO2 have dominance proportion in the sand sample with an average value of 92.90 %, followed by Al2O3 (5.13%). CaO, Fe2O3, MgO, K2O, Na2O, ZnO and MnO were present within acceptable limits as trace elements. The results showed average physico-mechanical properties of the natural moulding sand sample to include grain fineness number (126), bulk density (1765 Kg/m3 ), moisture contents (7.66%), specific gravity (2.64), permeability (0.1cm/s), green compressive strength (51KN/m2 ), dry compressive strength (209KN/m2 ), flowability (65.22%), clay content (10%) shatter index (76%) and refractoriness (>900o C), which were within the required standards for casting of non-ferrous metal. Thus, Belle sand was found suitable for casting of non-ferrous metals. Though, there may be a need for the use of additives like bentonite, to enhance the sand’s clay content in order to increase the sand potential for foundry applicationsItem Inhibitive Potential of Prosopis Africana on Corrosion of Low Carbon Steel in 1M Hydrochloric Acid Medium.(Published by Deer Hill Publications, B-19-06 PV8, Platinum Hill Condominium Jalan Melati Utama, 53100 Kuala Lumpur Malaysia., 2019-06-20) Shuaib–Babata, Y. L.,; Ibrahim, H. K.,; Ambali, I. O.,; Yahya, R. A.,; Ajao, K. S.,; Aremu, N. I.,; Pelumi, A. A.Recently, 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 Africanaextracts 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 Africanaextract shows that the corrosion current density decreases with the increase in the concentration of the extract. The extractis found suitable as green inhibitor for corrosion of low carbon steel in the studied medium.Item Quality Evaluation of Commercially Available Steels in Some Selected Nigerian Markets.(Published by University Politehnica Timisoara, Faculty of Engineering Hunedoara , 5, Revolutiei, 331128, Hunedoara, Romania., 2019-02-14) Shuaib-Babata, Y. L.,; Adewuyi, R .A.,; Ajao, K. S.,; Ambali, I. O.,; Aremu, N. I.,; Ibrahim, H. K.; Abdul, J. M.The incessant building collapse and structural failures in Nigeria has renewed interests in the evaluation of the basic properties of reinforcing steel bars in Nigeria markets, since local markets serve as major source of supply for the steels used in construction and structural development. Thus, this study evaluated the quality of commercially available reinforcing steel bars in some selected markets with a view to determine their suitability for structural applications. Various steel bars samples were obtained from markets in four Nigeria cities. The basic physico-mechanical properties of the samples were examined and the obtained results were compared with the specified parameters in Nigerian Industrial Standard (NIS), ASTM and British Standards. Visual inspections revealed that most of the parameters that must to be indicated in identification marks on reinforcing steel bars were absent. Results also showed that the samples contained the basic chemical constituents of steel and possessed significant strengths and hardness values, but with noticeable inconsistencies in their contents. Thus, the level of compliance with the specified properties in the standards needs improvement. To avoid incessant structural failures in the country, regular and effective monitoring of the quality of steel bars in the markets for structural applications becomes imperative.