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Characterization of clay deposits of Nanga-Eboko (central Cameroon): suitability for the production of building materials

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Clayey deposits of Nanga-Eboko (central Cameroon) were studied to assess their potential as building materials. Characterization was performed using XRD, FTIR, XRF, DTA/DTG and firing testing. Clays appear as discontinuous pockets with the same textural characteristics in three villages located on both sides of the Sanaga River. The average thickness of the exploitable layer is about 3m. The estimated tonnage ∼7–17 × 105 m3 can supply a brick industry of great importance. SiO2 (∼70%), Al2O3 (∼15%) and Fe2O3 (∼4%) are the predominant oxides of the natural clays. Quartz (∼55%), kaolinite (∼33%), illite (∼5%) and K-feldspar (∼4%) are major minerals. Clays are not suitable for building construction due to their fine-grained size and high plasticity properties. Firing properties of bricks (950 and 1050ºC) are good despite the high shrinkage values. Therefore the addition of '' degreasers '' is recommended to control shaping and drying.
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Document Type: Research Article

Publication date: 2013-09-01

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