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The California bearing ratio (CBR) of some mechanically stabilised laterite sub-base soils along the Ibadan-Oyo Road, Southwestern Nigeria

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  • P.A. Fasanmade
  • G.O. Adeyemi
  • E.O. Eze

Abstract

Mechanical stabilisation by mixing one lateritic soil with another is not a popular subject of research, hence this study. Samples were taken from two locations along the Ibadan-Oyo Road in Southwestern Nigeria. The study focused on determining the California bearing ratio of unsoaked and soaked samples, using the method of mixing geotechnically better lateritic soil as a stabilising agent, by volume, with another geotechnically poorer lateritic soil, employing different percentages by volume of the stabiliser. The soils samples were compacted at both the modified American Association of State Highway Transportation Officials (AASHTO) and West African levels using the British Standard 1377. The influence of stabiliser on some of the engineering properties of the soils was determined. Results of the geotechnical analysis show significant increase in the strength of all the samples when stabilised. The cumulative increase in the unsoaked CBR of the 5 stabilised samples varied from about 50% to 92%. This shows that mechanical stabilisation of the studied soils is very effective.

Suggested Citation

  • P.A. Fasanmade & G.O. Adeyemi & E.O. Eze, 2015. "The California bearing ratio (CBR) of some mechanically stabilised laterite sub-base soils along the Ibadan-Oyo Road, Southwestern Nigeria," African Journal of Science, Technology, Innovation and Development, Taylor & Francis Journals, vol. 7(2), pages 122-125, March.
    • Handle: RePEc:taf:rajsxx:v:7:y:2015:i:2:p:122-125
    DOI: 10.1080/20421338.2015.1023638
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