Clay mineralogy, major elements geochemistry and strength characteristics of three highway subgrade soils in Southwestern Nigeria

  • G. O. Adeyemi


The clay mineralogical assemblage, major elements geochemistry and strength characteristics in terms of the California Bearing Ratio (CBR) of three genetically different residual soils in Southwestern Nigeria were investigated. The study revealed a fairly strong negative correlation of-0.58 between the amount of kaolinite and the silica-sesquioxides of iron and aluminium ratio. It also showed a weak positive correlation of 0.004 between the amount of kaolinite and ferric oxide. The amount of ferric oxide and kaolinite showed positive correlation of 0.24 and 0.29 respectively with the strength (measured in term of (CBR) of the studied soils.

The study has stressed the relevance of a knowledge of geological characteristics prior to a rational understanding of some geotechnical properties of residual soils.


Kaolinite Nigeria Strength Characteristic Ferric Oxide Residual Soil 

Minéralogie des argiles, principaux éléments géochimiques et caractéristiques mécaniques de trois sols utilisés en couche de fondation de route express dans le Sud-Ouest du Nigeria


L'article présente l'étude des minéraux argileux, des principaux éléments géochimiques et des caractéristiques de résistance mécanique mesurées par le C.B.R., de trois sols résiduels génétiquement différents dans le Sud-Ouest du Nigeria. Elle a mis en évidence une corrélation nettement négative (-0.58) entre la teneur en kaolinite et le rapport silice/sesquioxydes de fer et d'alumine, aninsi qu'une très faible corrélation positive (+0,004) entre la teneur en kaolinite et en oxyde de fer. On note des corrélations positive (respectivement 0,24 et 0,29) entre la teneur en oxyde de fer et en kaolinite par rapport à la résistance C.B.R. des sols étudiés. L'étude a montré l'importance de la connaissance des caractérisitiques géologiques pour une bonne comprehension de certaines caractériistiques géotechniques des sols résiduels.


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Copyright information

© International Association of Engineering Geology 1994

Authors and Affiliations

  • G. O. Adeyemi
    • 1
  1. 1.Department of Earth SciencesOgun State UniversityAgo-IwoyeNigeria

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