Geotechnical Behavior of Clays from Ngbo Area, Eze-Aku Formation, Southeastern Nigeria in Construction

Geotechnical Behavior of Clays from Ngbo Area, Eze-Aku Formation, Southeastern Nigeria in Construction

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Author(s): Mathias O. Nweke, Hilary N. Ezeh, Philip N. Obasi, Ikenna A. Obasi

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DOI: 10.18483/ijSci.645 353 958 41-46 Volume 4 - Mar 2015


Clays noted to be highly expansive belonging to Ezeaku Formation, southeastern Nigeria were characterized using the following geotechnical properties which included Grain size distribution, Atterberg limits, free swell, bulk density, specific gravity, cation exchange capacity (CEC), chemical composition. The chemical composition of the clays indicates low percentages of Na2O with fairly higher percentages of CaO and K2O. The clays are plastic with liquid limit (LL) of 58.8 to 72.8, plastic limit (PL) of 24.6 to 30.1 and plasticity index (PI) of 35.5 to 45.8. They classify as inorganic clays of high plasticity (CH) according to USCS and as A-7-6 according to AASHTO classification systems. Plots of LL against PI show that the study clays are predominately illite with low presence of montmorillonite. The clays showed high specific gravity, which may be a reflection of their high iron content. This is an indication that the clay material is unsuitable for use as highway such as sub-base, base course and sub-grade materials and airfield pavement bases unless improved. Adequate road design and heavy compaction with necessary stabilization material will boost strength and stability of the clays for all purposes, especially as a base course material.


Clay, Effium, Ezeaku Formation, Ngbo, Southeastern Nigeria


  1. Akpokodje, E.G., Ololunfemi,B.N. and Etu-Efeotor, J.O., 1991. The composition and physical properties of some ceramics and pottery clays of Southeastern Nigerian. Journal of Min. and Geol., Vol.27, P.1-7
  2. American Society for Testing and Material, 1979. Annual Book. ASTM Standard, Part 19, Philadelphia.
  3. British Standard Institution, 1975. Methods of testing soils for Civil Engineering purpose, Bs 1377.
  4. Bell, F.G., 1976. The influence of the mineral content clays on their stabilization of cement. Bulletin of the Association of Engineering Geologists, Vol. Xiii, No. 4, P. 267-277.
  5. Chen, F.H., 1988. Foundations on expansive soils. 2nd edition, Elsvier Scientific Amsterdam, Netherlands.
  6. Grant, N.K., 1971. The South Atlantic Benue Trough and Gulf of Guinea Cretaceous triple junction. Geol. Soc. Am. Bull., Vol. 82, P. 2295 – 2298.[2295:sabtag];2
  7. Grim R.E., 1968. Clay Mineralogy. 2nd Edition,McGarw- Hill, New York, 596pp.
  8. Hall, P.L., 1993. Mechanism of overpressuring: an overview In: Geochemistry of clay-pore fluid interactions edited by Manning,D.A.C., Hall,P.L. and Hughes, C.R., Chaman and Hall London,P.265-309
  9. Holtz, W.G. and Gibbs, H.J., 1956. Engineering properties of expansive clay. Trans ASCE, vol.121, P. 641 –663.
  10. Hoque, M. and Nwajide, C.S., 1988. Tectono-sedimentological evolution of elongated intracratonic basin (Aulacogen): The case of Benue Trough Nigeria. Journal of Min. Geol., Vol. 21, P.12 – 18.
  11. Hossain, D., Matshal, M.I. and Sadagah B., 1997. Swelling characteristics of Madinoh clays. Journal of Engineering Geology, vol. 30, p. 205 – 220
  12. Inyang, H.I., Bae, S., Mbamalu, G. and Park S., 2007. Aqueous polymer effects on volumetric swelling of Na-montmorillonite. Journal of Material in Civil Engineering (ASCE), vol. 19., No.1, P.84-90.
  13. Reyment, R.A., 1965. Aspect of Geology of Nigeria. Ibadan University press. 145 pp
  14. Morgenstern, N.R. and Balasubramonian, B.I., 1980. Effects of pore fluid on the swelling of clay shale. Proceedings of the fourth International conference on Expansive soils. Denver, Vol.1, P.190-205.
  15. Okagbue, C.O., 1989. Geotechnical and environmental problems of the Niger-delta. Bulletin of the International Assoc. of Engineering Geology, No. 40, P.199-128.
  16. Skempton, A., 1953. The colloidal activity of clays. Proc.3rd Int. Conf. Soil Mech. Foundation Eng., Zarich,1:57-61.
  17. Tourtelot, H. A., 1974. Geologic origin and distribution of swelling clays. Bulletin of he Association of Engineering Geologist , Vol. V1, No. 4, P. 259-273.
  18. Van der Merve, D. H. 1964. The production of leave from the plasticity index and the percentage of clay fraction. Civil Engineering in South Africa.
  19. Wright, J.B., 1976. Origin of the Benue Trough. A critical review In: C. A. Kogbe (ed.) Geology of Nigeria. Elizabethan Publishing company, Lagos- Nigeria, P.187-295.

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