Browsing by Author "Jimoh, Y.A."
Now showing 1 - 4 of 4
Results Per Page
Sort Options
Item Assessment of properties of natural moulding sands in Ilorin and Ilesha, Nigeria(USEP Journal of Research Information in Civil Engineering, 2009) Aweda, J.O.; Jimoh, Y.A.The mechanical and permeability properties of natural sand deposits at Ilesha (south west) and Ilorin (middle belt) in Nigeria used in the foundry as moulding sand for casting of non-ferrous metals were investigated. The aim was to determine the optimum moisture content (OMC) for appropriate foundry works. The variation of the green strength of the moulding sand with the mixing water content was conducted to establish the OMC of 8% and 9% respectively for Ilesha and Ilorin sands. The corresponding values of the green compression strength of 52kN/m2 and 50kN/m2 , dry compression strength of 285kN/m2 and 300kN/m2 , shatter index values of 38 and 37 and the permeability index of 50 and 47.5 for Ilorin and Ilesha deposits respectively obtained at OMC of 8-9% were found adequate to produce sound casting of non-ferrous metals. The results indicate that with water addition in the range of 8-9%, the natural sands exhibit appropriate casting properties for non-ferrous metals in accordance with the standards and specifications of the America Foundry Society (AFS).Item Health hazard of traffic noise: Perceptions of dwellers on Tanke – University Road, Ilorin, Nigeria(Pacific Journal of Science and Technology, 2012-11) Aweda, J.O.; Jimoh, Y.A.The corresponding qualitative wellness (health) by the residents and roadside businesses around a motorized urban arterial was reported. The traffic sound level manifesting on the nodes and links was quantified by the equivalent noise level (L) of 73.5 dB (A), a value that is higher than the WHO (World Health Organization) allowable threshold for the comfort and wellness of residential communities was obtained. The perception of the dwellers around the studied arterial about the prevailing traffic induced noise pollution agreed with the common health stress indicators of headache, insomnia and annoyance, among others. It is recommended that the Nigerian noise level bench mark of 90 dB (A) be reviewed to a lower value in order to reflect the global best practices on noise pollution control and wellness of human dwellers around a motorised corridor.Item Role of Geomatics in the Management of Disasters and Infrastructural Failures(African Journals Online, 2013-02-19) Adeleke, O.O.; Jimoh, Y.A.; Ayanshola, A.M.; Aremu, A.S.The article identifies the role of Geomatics in the highly interdisciplinary disaster management to include identification and mapping of hazard prone areas, deformation monitoring of hazard prone areas and massive engineering structures, production of rescue maps and assessment of damages among others. A case study of surveying activities in the proposed flood management of Asa River in Ilorin metropolis, Nigeria was presented. The study identified possible causes of the flood to include silting along the river, blockades of free flow of water resulting from human activities such as dumping of refuse in the river and natural causes such as growth of vegetation along the river channel. The study recommends the development and deployment of Geomatics potentials in the three phases of disaster management namely; pre-disaster phase, disaster phase and post disaster phase.Item A traffic noise pollution model for an urban arterial: Case study of Tanke-University Road, Ilorin (Nigeria)(NSE Technical Transactions, 2012) Jimoh, Y.A.; Aweda, J.O.Traffic noise was investigated along an urban arterial for the purpose of developing a model for the management and control of traffic noise pollution on main corridors of movement in an urban setting. Noise levels were measured at morning and afternoon peak periods at major sections, (nodes and links), with respect to the prevailing traffic on Tanke Road, the main arterial linking the Ilorin Township to the University community. Regression analysis was performed on the traffic and noise data were generated at different times of the day. The traffic noise level on the Tanke – unilorin road in the units of sound equivalent, Leq are in the order of 73.5dB at all the sections of the road, which are higher than the World Health Organization (WHO) threshold but lower than the Nigerian’s Federal Environmental and Protection Agency (FEPA) standard of 90dB(A). The results imply that the noise pollution on the studied arterial is high and can adversely affect the welfare and daily activities of the residents and dwellers within the neighbourhood of an urban arterial. The regression analysis established a strong relationship between the average equivalent noise level (Leq) and Traffic described with a polynomial of order three and six with R2 values ranging from 0.73 to 0.98; and a relatively weaker relationship, with R2 of 0.13 to 0.92 for the traffic noise index (TNI) at all sections of the arterial.