The compressibility characteristics of a compacted laterite soil

  • Malomo S. 
Symposium on Engineering Geolgoical Problems of Construction on Soluble Rocks

Abstract

Laterite soils occupy large parts of the tropical regions of the world. They are used, in the compacted state, as bases for roads and air-field pavements, as fills for foundations, embankments and earth dams. Although the response to load with decreasing void ratio (compressibility) is important under the conditions of use, it has not been the subject of considerable study. Engineering studies in laterite soils have been limited to classification, compaction characteristics and sometimes, shear strength.

The compressibility characteristics of a compacted laterite soil from Paraiba State, North-East Brazil has been examined in the oedometer. The results indicate the presence of collapsible soil grains which comminute under load. The behaviour of soil with collapsible soil grains is described.

Les caracteristiques de compressibilite d'un sol laterite compacte

Résumé

Les sols latérites se trouvent dans la plupart des régions tropicales du monde. Ils sont utilisés, dans l'étât compacté, comme base de route, matériaux de fondations, remblais et barrage en terre. Bien que la réponse sur pression avec une diminution de taux de porosité est considerée importante lorsque il est utilisé comme mentionné ci-dessus, ceci n'etait pas bien traité auparavant. Les études d'ingénieur en sols latérites ont été limitées en classification, caracteristiques de compaction et parfois résistance au cissailement.

Les caractéristiques de compressibilité d'un sol de latérite compacté dans l'étât Paraiba, en Nord-Est de Brésil ont été examinées en utilisant le consolidometre. Les résultats obtenues indiquent la présence des grains de sol qui se fragmentent sur l'effet de pression. Le comportement d'un sol avec des grains qui peuvent s'effondrer est d'écrit.

References

  1. BRITISH STANDARDS INSTITUTION (1974): Methods of testing soils for civil engineering purposes B. S. 1377.Google Scholar
  2. GIDIGASU, M. D. (1974): The degree of weathering in the identification of laterite materials for engineering purposes. Eng. Geol., 8 (3) 216–266.CrossRefGoogle Scholar
  3. GIDIGASU, M. D. (1976): Laterite soil engineering. Elsevier, Amsterdam. 554 pp.Google Scholar
  4. LAMBE, T. W. (1958): The structure of compacted clay. Proc. Am. Soc. Civil Eng. 84, SM2, 1–34.Google Scholar
  5. LAMBE, T. W., and WHITMAN, K. V. (1969): Soil Mechanics. J. Wiley & Sons, New York 553 pp.Google Scholar
  6. LEE, K. L., and FARHOOMAND, I. (1967): Compressibility and crushing of granular soil in an isotropic compression. Canad. Geotechn. Journ. IV, Nol. 1, 68–87.CrossRefGoogle Scholar
  7. MALOMO, S. (1980): Stress-strain behaviour of some compacted laterite soils. (In press in Revista Brasileira da Geologia).Google Scholar
  8. MATYAS, E. L. (1967): Compressibility and shear strength of compacted soils. Unpublished Ph. D. Thesis. Imperial Coll. London.Google Scholar
  9. NOVAIS-FERREIA, H. and CORREIA, J. A. (1965): The hardness of laterite concretions and its influence on the performance of soil mechanics tests. Proc. 6th Int. Conf. S. M. F. E. Montreal. Vol. 1. 82–86.Google Scholar
  10. ROBERTS, J. E. (1964): Sand compression as a factor in oil-field subsidence. Sc. D. Thesis. Dept of Civil Eng. M. I. T. Cambridge Mass.Google Scholar
  11. SOWERS, G. F. (1963): Engineering properties of residual soils derived from igneous and metamorphic rocks. Proc. 2nd Pan American. Conf. on S. M. F. E. 1, 39–62.Google Scholar
  12. VARGAS, M. (1953): Some engineering properties of residual clay occuring in Southern Brazil. Proc. 3rd Int. Conf. S. M. F. E., Zurich, 1, 67–71.Google Scholar
  13. WALLACE, K. B. (1973): Structural behaviour of residual soils of the continually wet highlands of Papua New Guinea. Geotechnique. 23, 203–218.CrossRefGoogle Scholar

Copyright information

© International Association of Engineering Geology 1981

Authors and Affiliations

  • Malomo S. 
    • 1
  1. 1.Department of Geology and Applied GeologyUniversity of IfeIle-IfeNigeria

Personalised recommendations