Browsing by Author "Oyedepo, Joseph O."

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    Crack Mechanism of Different Concrete Grades under Compressive Loading: Application in Rigid Pavement
    (FUOYE Journal of Engineering and Technology, 2017-03-31) Oyedepo, Joseph O.; Dada, Temitope; Aladegboye, Segun; Adeniji, Akintayo A.
    The growth of cracks in concretes under different loadings in various structures and their consequent diminishing effect on the lifespan of structures is an age long structural problem. This research investigates the influence of compressive loading on the crack mechanism of different concrete grades 1: 1 : 3 (M20), 1: 2: 4 (M15) and 1: 3: 6 (M10) using three brands of cements available in Nigeria namely Dangote (Type A), Elephant (Type B) and Bua (Type C). Particle Size Distribution (PSD), Aggregate Crushing Value (ACV), Aggregate Impact Value (AIV) was carried out on aggregates in accordance with relevant codes while; compressive test were performed on the hardened concrete while, the crack width was measured using microscopic technique. A coefficient of uniformity (Cu) of 4.00, AIV of 46 % and an ACV of 47.7 % were obtained for the aggregate which are suitable for rigid pavements construction. Maximum compressive strength value of 24.96 N/mm2 , 24.67 N/mm2 and 24.89 N/mm2 respectively was obtained for concrete M20 for Type A, Type B and Type C cement at the 28 day. A corresponding crack width of 0.97 mm, 0.89 mm and 0.93 mm was obtained while; a yield period of 57.66 sec, 58.33 sec and 53.33 was obtained respectively. Comparing with the International Organization for Standardization, concrete grade M20 any of the cement types is suitable for the construction of rigid pavements with heavy traffic volume while M15 is recommended for low traffic volume.
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    PUBLIC TRANSPORT POLICY IN DEVELOPING COUNTRIES: NIGERIA AS A CASE STUDY
    (SMAT FUTA, 2017-07-02) Adanikin, Ariyo; Oyedepo, Joseph O.
    This paper reviewed understudies public transport approach utilizing factors such urbanization, populace development, vehicle proprietorship, and utilization. With changes in the social, political and economic climate of Nigeria, this study looks at how these changes have affected transportation request and supply, transport arrangement and directions, and parts of economic aspects and fund identified with public transport. Conservation and enhancing of existing modes, effective utilization of people in general transport administration framework, executing appropriate transportation measures, and empowering a move towards reasonable modes were suggested. Review of government policies towards public transportation was undertaken and it shows that if developing nations like Nigeria are to achieve their economic transformation blueprint such as the Millennium Development Goals (MDGs), they require a functional, reliable and effective transport system to, among other things, connect people, places, services, opportunities and all these can only be derived by properly formulated and implemented policies with the aid of all relevant private, academic and government bodies working together.