Browsing by Author "O.S. Odusanya"

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    Flow Statistics and the Scaling of Ceramic Water Filters
    (Advanced Materials Research, 2015) E. Annan; K. Mustapha; S.T. Azeko; O.S. Odusanya; Karen Malatesta; W.O. Soboyejo
    According to World Health Organization, there was increase in the number of people that have access to safe drinking water between 2006 and 2010. Such trends can be countered partly by the use of ceramic water filters that can remove microbial pathogens from water. However, the initial flow rates in such filters are often limited to ranges between 1 and 3 L/hr. The flow rates may vary statistically and decrease with increasing filter use. In this paper, the flow through ceramic water filters is characterized using Darcy’s equation. An effective permeability is obtained for filters with a range of micro-and nanoscale pore sizes. The statistical variations in the flow rates and effective permeabilities are elucidated along with the potency of multiple filter system for scale-up studies in serving a community.
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    Strength and Fracture Toughness of Earth-Based and Natural Fiber-Reinforced Composites
    (Advanced Materials Research, 2015) Kabiru Mustapha; M.G. Zebaze Kana; O.S. Odusanya; W.O. Soboyejo
    This paper presents the results of a combined experimental and theoretical study of the strength and fracture toughness of earth-based materials. They include mixtures of laterite, clay and straw that is stabilized with controlled levels of Portland cement. The compositional dependence of compressive, flexural strength and the fracture toughness is explored for different proportions of the constituent materials. Composites and fracture mechanics models are used to estimate the strength and fracture toughness of the resulting composites. The applications of the results are discussed for the design of earth-based building materials for affordable housing.