FACULTY OF TECHNOLOGY

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    Effect of microwave assisted alkali pretreatment and other pretreatment methods on some properties of bamboo fibre reinforced cement composites
    (2020) Akinyemi B.A; Temidayo Omoniyi T.E; Onuzulike G.
    This study investigated the effectiveness of microwave irradiation pre- treatment in combination with sodium hydroxide and other pretreatment methods on bamboo fiber cement composite characteristics. The materials used for this study include bamboo fibers, Portland cement, fine sand and calcium chloride. Microwave assisted sodium hydroxide (MT), sodium hydroxide alone (AA) and hot water (HT) treatments were used to pre-treat the bamboo fiber before its use in the cementitious composite. Mechanical tests were conducted after 7, 14 and 28 days while Fourier transformed Infrared spectroscopy (FTIR) with Scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS) were used to characterize the composites. The use of microwave assisted alkali treatment is observed to have the best performance due to its more efficient role in improving fiber roughness, ductility and toughness in the cementitious composites.
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    Sorption characteristics of cement composite reinforced with some locally available lignocellulosic materials in Nigeria
    (2013) Omoniyi T. E.; Olorunnisola A.O.; Akinyemi B.A.
    The aim of this study was to investigate the sorption property of wood cement composite produced from bagasse (Saccharum officinarum), bamboo (Bambusa vulgaris) and coir (Cocos nucifera L). The mass of the fibre varies from 1 to 6% of the mass of cement. The result indicated that the mass fraction has significant effect on the sorption properties of the composites. Water absorption (W.A.) rate increases with increase in the fibre content of the composites. Thickness swelling (T.S.) in all the composites was less than 1.7% at 24 h water immersion at room temperature. There was linear correlation between mass fraction, water absorption and thickness swelling of the composites. The relatively low W.A. capacity and T.S. at content less than 3% of mass of cement suggests that they can be employed in outdoor situations and at this level they are dimensionally stable but beyond this level it is not advisable.