AGRICULTURAL & ENVIRONMENTAL ENGINEERING

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Subject: search.filters.subject.Bamboo

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    Effect of moisture on thermal properties of acrylic polymer modified mortar reinforced with alkali treated bamboo fibres
    (2018) Akinyemi B.A; Omoniyi T.E
    In this study, bamboo fibres were used as reinforcement materials for acrylic emulsion polymer modified cement bonded concrete after treatment with 10% weight of NaoH solution at 23 _C for 24 h. Thermal conductivity, thermal resistance and thermal transmittance were studied and the effects of moisture penetration at 11% wet basis were evaluated. Moisture penetration greatly reduced the thermal strength of the concrete with the exception at 10% acrylic polymer addition and 1.5% bamboo fibre inclusion. Based on the findings it can be reported that bamboo fibres greatly improved the thermal performance of the composite building material while the inclusion of acrylic polymers also hindered to a large extent the penetration of moisture into the capillary network.
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    Properties of latex polymer modified mortars reinforced with waste bamboo fibers from construction waste
    (2018) Akinyemi B.A.; Omoniyi T.E
    This study evaluated the properties of latex modified cement mortars from ordinary paints which were reinforced with treated bamboo fibers from construction waste. Fiber variations of 0, 0.5, 1 and 1.5% at 10% of the weight of cement were utilized. Mechanical properties were determined according to standards; similarly, scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) were used to analyze the micro structural and elemental properties of the samples. The experimental results revealed that the addition of 1.5% bamboo fibers and 10% latex solution produced excellent mechanical properties. This was as a result of improved fiber adhesion to the matrix through pre-treatment, coupled with the contributed high strength from the latex paint modified mortars. The micro graph showed that latex precipitated in the voids and on the surface of the bamboo fibers as well as gels of calcium silicate hydrates which contributed to the observed improvement in strength of the tested samples.
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    Effect of moisture on thermal properties of acrylic polymer modified mortar reinforced with alkali treated bamboo fibres
    (2018) Akinyemi B.A; Omoniyi T.E
    In this study, bamboo fibres were used as reinforcement materials for acrylic emulsion polymer modified cement bonded concrete after treatment with 10% weight of NaoH solution at 23 _C for 24 h. Thermal conductivity, thermal resistance and thermal transmittance were studied and the effects of moisture penetration at 11% wet basis were evaluated. Moisture penetration greatly reduced the thermal strength of the concrete with the exception at 10% acrylic polymer addition and 1.5% bamboo fibre inclusion. Based on the findings it can be reported that bamboo fibres greatly improved the thermal performance of the composite building material while the inclusion of acrylic polymers also hindered to a large extent the penetration of moisture into the capillary network.
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    Engineering properties of acrylic emulsion polymer modified bamboo reinforced cement bonded composites
    (2017) Akinyemi B.A.; Omoniyi T.E.
    In this study, bamboo fibres from Bambusa Vulgaris species were used as reinforcement materials for acrylic emulsion polymer modified concrete to determine their engineering properties and elemental compositions. Moisture absorption, density and percentage voids were investigated as well as the compressive strength, flexural strength and split tensile strength at 28, 45 and 60 days of air curing. Acrylic polymers reduced moisture intake, increased the densities and led to another increase in percentage of voids but composite samples with bamboo fibre inclusions at 1.5% and 10% polymers with 1.5% fibre an 15% polymers showed better physical properties than those with polymers only. Compressive and split tensile strength tests had similar results of optimum strength at 45 days while flexural strength test had optimum value at 60 days of air curing. This showed that the properties of unreinforced concrete could be improved through addition of fibres and polymers for use in structural applications.