AGRICULTURAL & ENVIRONMENTAL ENGINEERING

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2017 - 20202

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Author: search.filters.author.Omoniyi T.E.Subject: search.filters.subject.Properties

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    Innovative husk-crete building materials from rice chaff and modified cement mortars
    (2020) AkinyemI B.; Omoniyi T.E.; Elemile O.; Arowofila O.
    The study considers the use of rice chaff s (husks) as an aggregate in a composite cement matrix system. Cement mortars were modifi ed using styrene butadiene rubber polymer for strengthening. The goal is to develop a lightweight building material with good thermal insulation properties out of agricultural waste. The compressive strength, split tensile strength and fl exural strength were experimentally evaluated. Further analyses of the samples were carried out by means of scanning electron microscope and energy dispersive spectroscopy. The key results obtained were presented and analysed with the performance of the proposed husk-crete building material showing adequate properties essential for a lightweight structural material with possible applications for non-structural purposes.
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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.