Department of Material Science and Engineering

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Browsing Department of Material Science and Engineering by Author "Annan, Ebenezer"

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    Strength and fracture resistance of cellulose fiber reinforced cement composite
    (2022-07-26) Mustapha, Kabiru; Sogoye, Michael; Abdulraman, Sikiru Ottan; Danyuo, Yiporo; Tahiru, Azeko Salifu; Annan, Ebenezer
    This study presents the production and experimental assessment of the strengths and fracture resistance of cellulose fiber-reinforced cementitious composite material. The composite, which consists of mixture of recycled fibers obtained from waste carton boxes, was stabilized with measured level of Ordinary Portland Cement. The effects of constituent’s composition on compressive strength, flexural strength and fracture toughness were elucidated. Compressive strengths and flexural strengths were measured using uniaxial compressive and three-point bend loading conditions respectively while a single edge notch bend test (SENB) condition was employed for the fracture toughness measurement. The results obtained from experiments showed that the composite properties are significantly improved by the fiber reinforcement with optimum properties obtained at fiber composition of 5wt. % with compressive strength of 24.4 MPa, flexural strength of 8.0 MPa and fracture toughness of 1.36 MPa√m. The results were discussed for possible applications of robust cellulose fiber reinforced cement composite materials suitable for interior structural applications and to provide potential opportunities for waste management and/or recycling of carton boxes and other related wastes.
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    Theoretical modeling of flow for frustum - shaped ceramic water filters via disc-shaped ceramic water filters
    (ARPN Journal of Engineering and Applied Sciences, 2019-12-24) Bensah, Yaw Delali; Damoah, Lucas N. W.; Nyankson, Emmanuel; Yaya, Abu; Nukpezah, Daniel; Azeko, Salifu Tahiru; Mustapha, Kabiru; Annan, Ebenezer
    In the past two decades, research on household technologies has been on the increase. Ceramic water filters are simple and appropriate technology proven to have capability to provide improved drinking water especially in rural and peri-urban communities. These filters can be fabricated into various shapes with careful consideration of their mechanical robustness. This paper gives an overview of various flow models in estimating flow rate for ceramic water filters, in particular frustum-shaped ceramic water filters. Analytical approach to estimate the quantity of water considering the geometrical shapes; frustum and cylindrical shapes of the Ceramic water filters are adopted. The analytical expressions deduced for the flows are applicable on the assumption that the materials used in the fabrication of the filters are the same, thus same material properties (chemical and thermal properties) and porosimetry characteristics. Also, the comparative flow equation is largely dependent on dimensions of the ceramic water filters. The scholarly articles on flow through ceramic water filters for frustum-shaped filter are theoretically explored.