Advertisement

Properties of concretionary laterite gravel concrete

  • E. G. Akpokodje
  • P. Hudec
Article

Abstract

The compressive strength and the expansion of conrete made with both highly and slightly/moderately indurated concretionary laterite gravels were studied. The compressive strength (19–42 MPa) of most of the laterite concrete is comparable with the average strength (45 MPa) of concrete made with the usual granite crushed rock aggregates from the region. The strength of the laterite concrete is mainly dependent on the aggregate-cement bond whereas the physical properties of the aggregates are only of secondary importance.

The laterite concrete showed a net contraction when immersed inhot 1N NaOH solution (i.e. rapid alkali reactivity test). This behaviour is attributed to the low/very low contents of silica, clay and lime in the aggregates. The results of the study reveal that concretionary laterite gravels are potential alternative cheap sources of aggregates for structural concrete.

Keywords

Compressive Strength Gravel Lateritic Soil Concrete Core Soude 

Propriétés de bétons fabriqués avec des graviers latéritiques

Résumé

L'article présente les caractéristiques de résistance et de gonflement de bétons fabriqués avec des graviers latéritiques tantôt fortement et tantôt modérément ou légèrement indurés. La résistance en compression (19 à 42 MPa) de la plupart des bétons de latérite est comparable à la résistance moyenne observée sur les bétons de la région fabriqués avec des granulats concassés de granite (45 MPa). La résistance du béton de latérite dépend principalement de la liaison ciment-granulat, les caractéristiques mécaniques de granulats n'ayant qu'une importance secondaire.

Le béton de latérite a présenté une contraction nette après immersion dans une solution de soude normale (i.e. essai rapide d'alcali-réaction). Ce comportement est attribué aux pourcentages très faibles de silice, d'argile et de chaux dans les granulats. Les résultats de l'étude montrent que les graviers latéritiques peuvent être une source bon marché de granulats pour la confection des bétons de structure.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. ADEPEGBA D., 1975: A comparative study of normal concrete with concrete which contains lateritic fines instead of sand. Building Sciences, vol. 10, pp. 135–141.CrossRefGoogle Scholar
  2. AKPOKODJE E.G., 1986: A method of reducing the cement content of two stabilized Niger delta soils. Q.J. Engng Geol. vol. 19, pp. 359–363.CrossRefGoogle Scholar
  3. AKPOKODJE E.G. and HUDEC P.P., 1990a: Effect of void characteristics and parent source on the strength of lateritic gravel aggregates. Proc. 6th. IAEG Congress, Amsterdam, vol. 4, pp. 3025–3030.Google Scholar
  4. AKPOKODJE E.G. and HUDEC P.P., 1990b: Factors controlling the properties and durability of concretionary laterite gravel aggregates, (in press, Am. Society of Civil Engineers).Google Scholar
  5. AMERICAN SOCIETY FOR TESTING AND MATERIALS. 1982: Annual Book of ASTM Standards. Part 14, ASTM standard methods of testing concrete and mineral aggregates, 878 p.Google Scholar
  6. AMERICAN SOCIETY FOR TESTING AND MATERIALS. C192-81: Making and curing concrete test specimens in the laboratory.Google Scholar
  7. AMERICAN SOCIETY FOR TESTING AND MATERIALS, C 227–81: 81: Potential Alkali-Reactivity of cement aggregate combinations (mortar bar method).Google Scholar
  8. BHATIA H.S., 1968: Soil cement. A material for construction of roads and airfield pavements. Building & Road Res. Inst. Kumasi, Tech. Paper 1, 51 p.Google Scholar
  9. LASISI F. and OGUNGAMI B., 1984: Source and mix proportions as factors in the characteristic strength of lateritised concrete. Int. J. Dev. Techn., vol. 2, pp. 151–158.Google Scholar
  10. LABI J.A. and HUDEC P.P., 1990: A study of alkali-aggregate reaction in concrete: Measurement and prevention. Cement and Concrete Research, vol. 20, pp. 73–78.CrossRefGoogle Scholar
  11. OLA S.A., 1978: Geotechnical properties and behaviour of some stabilized Nigerian lateritic soils. Q.J. Engng. Geol., vol. 11, pp. 145–160.CrossRefGoogle Scholar

Copyright information

© International Assocaition of Engineering Geology 1992

Authors and Affiliations

  • E. G. Akpokodje
    • 1
  • P. Hudec
    • 2
  1. 1.Department of GeologyUniversity of Port HarcourtPort HarcourtNigeria
  2. 2.Department of GeologyUniversity of WindsorWindsorCanada

Personalised recommendations