Characterization of the Lateritic Soil of Kamboinsé (Burkina Faso)
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Date
2022
Journal Title
Journal ISSN
Volume Title
Publisher
Proceedings of the RILEM International Symposium on Bituminous Materials (Springer)
Abstract
Laterite is a very common material in tropical countries. Good quality
lateritic deposits are becoming increasingly rare. This material is used as a base
course for most roads built in tropical Africa. These materials are selected on the
basis of geotechnical test results in accordance with current standards. However,
these materials do not perform well in situ after a short period of time, causing
premature pavement degradation. This poor behavior can be ascribed to insufficient
geotechnical testing to justify the choice of these materials in road construction. In
this work, in addition to traditional geotechnical tests (particle size analysis, Atterberg
limits, modified Proctor, CBR Index), compression tests were performed in addition
to traditional geotechnical tests to determine compressive strength and elasticity
modulus. Geotechnical tests carried out on the laterite of Kamboinsé according to
the lithology of the quarry reveal that the characteristics decrease with depth and that
the first layer can be used as a base layer. Cement improvement for small percentages
(1, 2 and 3%) shows a clear improvement in mechanical characteristics. An addition
of 2% cement allows the use of the second base layer, improvement of 3% allows the
use of the first layer as a base layer. An addition of granite crushed granites of class
0/31.5 improved the physical properties of materials for additive percentages varying
from 20, 25, 30 and 35% by weight of dry materials. This improvement allows the
use of layers 1, 2 and 3 as a base layer for low traffic, layer 4 can be used as a base
layer.
Description
Keywords
Laterites, Geotechnical characterization, Cement improvement, Litho-stabilization, · Kamboinsé, Anne Pantet, Engineering, Burkina Faso, Institut International d'Ingénierie de l'Eau et de l'Environnement (2iE), 2iE College of Engineering