Abstract
The cretaceous Auchi shale and the Tertiary Imo shale in SW Nigeria were investigated for their suitability for use as a clay seal in waste disposal landfills. Geotechnical analyses indicated they are highly plastic inorganic clays. Although their geotechnical and chemical properties were within the range suggested by various authors for use as mineral seals, care would need to be taken with the Okada shales as they contain smectite and would be difficult to work and liable to cracking.
Résumé
Les schistes crétacés d’Auchi et les schistes tertiaires d’Imo dans le SW du Nigéria ont été étudiés pour leur aptitude à constituer des matériaux d’étanchéité sur les stockages de déchets. Les analyses géotechniques ont montré qu’il s’agit d’argiles inorganiques fortement plastiques. Bien que leurs propriétés géotechniques et chimiques les placent parmi les matériaux aptes à constituer des couches de scellement il apparaît nécessaire d’utiliser les schistes d’Okada avec prudence car ils contiennent des smectites. Leur mise en œuvre serait délicate et ils seraient susceptibles de se fissurer.
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Obrike, S.E., Osadebe, C.C. & Omoniyi, S.S. Geotechnical analysis of two Nigerian soils for use as clay liners. Bull Eng Geol Environ 68, 417–419 (2009). https://doi.org/10.1007/s10064-009-0189-y
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DOI: https://doi.org/10.1007/s10064-009-0189-y