Études géotechniques d’un échantillon de sol latéritique prélevé à Mamini (Centre de la Côte d’Ivoire) pour une utilisation comme remblai

Geotechnical investigation of a lateritic soil from Mamini (Central Côte d’Ivoire) for its use as an embankment A thorough understanding of materials before their use is essential to prevent the premature deterioration of civil engineering structures. This study was therefore conducted to determine the physical and mechanical properties of laterite from Mamini, a locality in central Côte d'Ivoire, for its optimal use in local civil engineering works. Samples collected from the quarry underwent a comprehensive geotechnical characterization, including particle size analysis, Atterberg limits tests, the Proctor compaction test, the California Bearing Ratio (CBR) test, and in situ density measurements. Based on the LCPC (French Road and Bridge Central Laboratory) classification, the soil was identified as a clayey gravel (GA). This classification is supported by its liquid limit (wL) of 33% and plasticity index (PI) of 16%. The Proctor compaction test revealed an optimum at a maximum dry density of 2.14 t/m³ and an optimum moisture content of 8.20%. Finally, the material yielded a California Bearing Ratio (CBR) value of 88%. These results indicate that this soil is suitable for use as embankment fill and as a base course in pavement structures. To further extend its potential applications, its particle size distribution could be optimized by incorporating fine-grained soils.