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Stabilization of maiduguri black cotton soils of Nigeria with sand

  • Ola S. A. 
Symposium on Engineering Geolgoical Problems of Construction on Soluble Rocks
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Abstract

The Lake Chad Basin is an extensive Quaternary lacustrine deposit of black clay soils. Laboratory investigations show that this soil consists of abundant proportions of montmorillonite and generally poses a major problem for Civil Engineering construction due to high volume changes.

Alternative soils or aggregates suitable for base construction are very difficult to obtain in these localities and hence soil stabilization is of great economic importance to the construction industry. Methods of stabilizing this soil include lime stabilization, cement stabilization, mechanical stabilization, or heat treatment. This paper is primarily concerned with sand stabilization because of the presence of large deposits of dune sands at these locations. The result indicates that sand stabilization shows promise for improving the value of black cotton clays in pavement construction and is the most economical of all the applicable methods. However the method is recommended only for improving the subgrade and as a sub-base.

Keywords

Nigeria Sand Content Optimum Moisture Content Sand Ridge California Bearing Ratio 

Stabilisation des clack cotton sols de maiduguri du Nigeria au moyen du sable

Résumé

Le bassin du lac Tchad est un dépôt lacustre très étendu, quaternaire, formé de sols argileux noirs. Des investigations en laboratoire montrent que ces sols contiennent une grande quantité de montmorillonite. Ceci représente un grand problème pour les travaux publics à cause des changements de volume considérables.

Dans ces régions il est très difficile de trouver des sols ou des agrégats de remplacement convenables pour constructions et fondations. Pour cette raison la stabilisation du sol a une grande importance économique pour l'industrie de la construction. Les méthodes de stabilisation comprennent la stabilisation au calcaire, au ciment, la stabilisation mécanique ou le traitement thermique. Cet article s'occupe particulièrement de la stabilisation au sable à cause de la présence de larges dépôts de sable de dune dans ces régions. Le résultat indique que la stabilisation au sable semble prometteuse pour l'amélioration des argiles noires pour la construction des trottoirs et que c'est la méthode la plus économique. De toute façon, cette méthode n'est recommandée que pour améliorer le sous-sol.

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References

  1. CARTER, J. D., BARBER, W. and TAIT, E. A., (1963): The Geology of Parts of Adamawa, Bauchi and Bornu Provinces in North-Eastern Nigeria. Geol. Surv. Nigeria, Bull. No. 30 109 p.Google Scholar
  2. CLARE, K. E., (1957): Airfield Construction on Overseas Soils, Part 2: Tropical Black Clays. Proc. Inst. Civil. Eng. Vol. 8: pp 223–231.Google Scholar
  3. CROFT, J. B., (1967): The Influence of Soil Mineralogical Composition of Cement Stabilization. Geotechnique Vol. 17: pp 119–135.CrossRefGoogle Scholar
  4. DE GRAFT-JOHNSON, J. W. S., BHATIA, H. S. and GIDIGASU, M. D. The Engineering Characteristics of a Lateritic Residual Clay of Ghana for Earth Dam Construction. Symposium on Rock and Earth Fill Dams, New Delhi, India, August 1968. Vol. 1: pp 94–117.Google Scholar
  5. DUROTOYE, B., (1975): Quaternary Sediments in Nigeria, Geology of Nigeria, C. A. Kogbe Ed. The Elizabethan Publishing Co., Lagos, Nigeria, pp 347–361.Google Scholar
  6. KATTI, R. K., KULKARNI, K. R. and RADHAKRISHNAN, N., (1966): Research on Black Cotton Soils without and with Inorganic Additives. Road. Res. Bull. Indian Congs. No. 10: 920.Google Scholar
  7. KATTI, R. K. and SUDHAR, S. (1962). Stabilization of Black Cotton Soil Sample with Combinations of Cement and Lime. Jour. Indian Mal. Soc. of Soil Mech and Found. Engg. Vol. 1: pp 43–54.Google Scholar
  8. LEES, M. H., (1938): Burnt Cotton Soil: Its Use in Roads and Runways. Sudan Engn. Soc. Lyon Associates, Inc. (1971), Laterites and Lateritic Soils and Other Problem Soils of Africa. An engineering study for Agency for International Development AID/csd 2164, Lyon Associates, Inc., Baltimore Maryland, U.S.A.Google Scholar
  9. MEHRA, S. R., and UPPAL, H. L., (1964): Laboratory and Field Experiences in the Construction of Road in Black Cotton Soil Areas. Second Asian Reg. Conf. on Soil Mech. and Found. Engg. Tokyo, Vol. 1: pp 294–300.Google Scholar
  10. MISTY, J. F., (1957): Experimental Soil Stabilized Road Construction in Black Cotton Soil Area. Indian Roads Congr. Journ. Vol. 22: pp 261–296.Google Scholar
  11. OLA, S. A., (1974): Bitumen Stabilization of Two Nigerian Soils, presented at the June 11–12, 1974 Bitumen Technical Seminar, Kano.Google Scholar
  12. OLA, S. A., 1978. The Geology and Engineering Properties of the Black Cotton Soils of North Eastern Nigeria, Engineering Geology, Elsevier Scientific Publishing Company, Amsterdam, The Netherlands.Google Scholar

Copyright information

© International Association of Engineering Geology 1981

Authors and Affiliations

  • Ola S. A. 
    • 1
  1. 1.University of BeninBenin CityNigeria

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