Influence of mineralogical and geochemical multi-parameters on the geotechnical properties of gneiss-derived lateritic gravels from an equatorial zone, center Cameroon
Aloys Thierry Ndzié Mvindi, Lise Carole Okomo Atouba, Marie Thérèse Nanga Bineli, Willy Passy Mvindi Mvindi, Ghislain Nguentchou Tchanfa, Vincent Laurent Onana, Georges Emmanuel Ekodeck
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引用次数: 0
Abstract
Lateritic gravels are extensively used in road construction and other civil engineering structures. Depending on various parameters, genetic characteristics vary from one locality to another. Geological analyses were conducted to investigate their influence on the geotechnical properties of lateritic gravels developed on gneiss for their better use in road construction. Petrographical, mineralogical, and geochemical results show the existence of two types of lateritic gravels in the study area: yellowish to brownish lateritic gravels of humid savannah (LGHS) and reddish lateritic gravels of dry savannah (LGDS). These materials mostly content quartz, kaolinite, hematite, goethite, muscovite, gibbsite, anatase, Fe2O3, Al2O3, and SiO2. The hematite, goethite, Fe2O3, and Al2O3 content has a positive influence on the geotechnical behavior of the studied lateritic gravels, while the content of quartz, muscovite, and SiO2 has the opposite effect. The evaluation of alterologic parameters show that the degree of lateritization has a positive influence on CBR, maximum dry density, and the specific gravity. Three CBR models with determination coefficients R2 = 0.85, 0.87, and 0.88 were established by associating the genetic characteristics of the materials with geotechnical parameters. The outcomes of the present study show that geotechnical properties of lateritic gravels are significatively influenced by their genetic characteristics. Is therefore important to performed geological studies for a better use of lateritic gravels in road construction.
期刊介绍:
The Arabian Journal of Geosciences is the official journal of the Saudi Society for Geosciences and publishes peer-reviewed original and review articles on the entire range of Earth Science themes, focused on, but not limited to, those that have regional significance to the Middle East and the Euro-Mediterranean Zone.
Key topics therefore include; geology, hydrogeology, earth system science, petroleum sciences, geophysics, seismology and crustal structures, tectonics, sedimentology, palaeontology, metamorphic and igneous petrology, natural hazards, environmental sciences and sustainable development, geoarchaeology, geomorphology, paleo-environment studies, oceanography, atmospheric sciences, GIS and remote sensing, geodesy, mineralogy, volcanology, geochemistry and metallogenesis.