Fines Content and Cohesion of Lateritic Soils: Conceptual Models | Chapter 01 | Advances in Applied Science and Technology Vol. 5
Laterite has been widely defined as a
highly weathered material, rich in secondary oxides of iron, aluminium, or both. It is void or
nearly void of basic primary silicates, but it may contain large amounts of
quartz and kaolinite. A distinctive feature of laterite and lateritic soils is
the higher proportion of sesquioxides of iron and/or aluminium relative to the
other chemical components. This study proposed conceptual models for the
determination of soil cohesion based on the correlations of soil cohesion with
fines content. This was with a view to contributing to timely, less laborious and cost effective determination of cohesion of
lateritic soils. Selected lateritic soil samples were subjected to laboratory
analyses. The fines were separated from the coarse component of the soils after
which the samples were remoulded in varying ratios (fines: coarse) from 10:90
to 100:0 in 10% increment. The samples were
then subjected to an unconsolidated-undrained triaxial
test to determine
the shear strength parameters. Quantitative
relationships between fines content and cohesion of the soil samples were
developed. It was found that the cohesion of the soil samples generally
increased with an increase in fines
content; the polynomial
relationships gave the
best fitting between
the fines content
and cohesion of the soil samples. From the findings of this research
work, thefollowing conclusions are made
in relation to the objectives
of the research:
(i) The cohesion
of the studied
soil samples generally increased
with an increase in fines content; (ii) the best fitting between the fines
content and cohesion of the soil samples. The results are valid within the
study area, the tested materials and the procedure outlined
in this paper.
It is recommended
to perform more
experiments to validate
the finding in this research.
Author(s) Details
DR. G. O. ADUNOYE
Lecturer at the Department
of Civil Engineering, Faculty of Technology, Obafemi Awolowo University,
Ile-Ife, Nigeria
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