scholarly works

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    Geotechnical properties of natural composite rock in Ibadan, Nigeria
    (Akamai University, 2012) Adebisi, N. O; Akintayo, F. O.
    The physical property of a rock is a pointer to its suitability for civil engineering works. In this study the suitability of composite rock as construction materials is established. Thirty-four fresh block samples of quartz-schist masses were obtained from three locations in Ibadan, Nigeria. Thin sections were prepared from two representative samples, while others were subjected to standard geotechnical laboratory testing. Regression plots were made to assess the degree of association between pairs of dependent physical parameters of the rock. The results show in thin section that individual quartz crystals of the samples have complexly sutured outlines and mutual interlocking. Modal analysis reveals quartz as the dominant mineral with subordinate amounts of muscovite. The density (y) is the least variable parameter and ranges between 2600 and 2660 kg/m3. Water absorption ranges between 0.64 and 3.39 %, indicating good rock materials for construction. Regression analysis shows that approximately 20% of the variation in density and 2% of the void ratio were associated with porosity and water absorption capacity of the rock respectively. These are due to different proportions of quartz and muscovite with voids in the quartz-schist.
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    A preliminary evaluation of the impact of covid-19 on public transportation in Ibadan metropolis: a case study of Ibadan North local government
    (Nigerian Society of Engineers, 2020-09) Okunlola, O.; Akintayo, F.O.
    A number of measures have been put in place by different governments to combat the spread of Covid-19 virus. The virus has affected all forms of transportation. This paper is a preliminary study to evaluate the impact of Oyo State government lockdown measures on public transportation in Ibadan North Local Government Area between March and June 2020. Seven factors affecting public transportation as identified from literature include: availability of service, cost of service, comfortability safety /social distancing, parking difficulties and rate of accidents. Structured questionnaires were administered to purposively selected road users. The level of importance of each factor was determined and ranked by Relative Importance Index (RII). The study shows that there was a significant reduction in travel demand which in turn caused a significant increase in cost of transportation and waiting time for commuters.