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Physico-Mechanical Characterization of Clay and Laterite Bricks Stabilized or Not with Cement

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Document pages: 10 pages

Abstract: This study focuses on the valuation and optimizationof local materials to meet the challenge of sustainable development. Faced withclimate change and the preservation of the environment, research intoeco-materials is necessary to reduce the energy bill while ensuring comfort andsafety. The objective is to make a comparative characterization of thephysico-mechanical properties of compressed earth bricks made from localmaterials: clay, laterite and sand. These are, on the one hand, bricks madefrom clay and laterite, reinforced with a percentage of sand varying between 20 and 30 in steps of 5 ., were made.On the other hand, these same mixtures stabilized with 5 cement (CEM II-32.5)are also used to produce bricks. A characterization of the raw materialswas made before studying the physico-mechanical properties of thebricks themselves. This involved evaluating the water absorbency andcompressive strength of stabilized and unstabilized bricks. The results showthat the absorptivity of stabilized clay bricks is acceptable up to 25 sand because it is less than the 15 maximum value set byCameroonian standard NC-104: 2002-06. However, that of stabilized lateritebricks is higher than the maximum value set by the standard. The compressivestrengths, for clay bricks stabilized with 5 cement and for laterite brickswith 0 sand added, are all greater than 2 MPa and therefore are acceptable. Inaddition, clay bricks with 20 sand and stabilized with 5 cement arerecommended because they have the most optimal physico-mechanical properties.

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