TITLE:
Assessment of Geotechnical Properties of Lateritic Gravels from South-Cameroon Road Network
AUTHORS:
Philémon Zo’o Zame, Philippe Samba Assomo, Josephine Nchekwube Onwualu
KEYWORDS:
Properties, Lateritic Gravel, Tests, Geotechnical Characterization, Foundation Layers
JOURNAL NAME:
International Journal of Geosciences,
Vol.8 No.8,
August
15,
2017
ABSTRACT: The southern road network covers the eastern, central and southern administrative
regions; its linear network of national and provincial roads is about 5
620 km. It was the subject of a survey for the identification of lateritic quarries.
To this effect, 144 sites have been discovered. The collected lateritic gravels
were subjected to identification analyzes (Granulometry, Atterberg Limits,
densimetry, water content) and geotechnical characterization tests (Proctor
Modified, CBR at 95% OPM). The obtained results show that the grain
size has a great percentage of gravels (>60%) followed by sand. Stones silt and
clay particles are poorly represented. The samples show a high plasticity in
conformity with Casagrande’s plasticity diagram. The density values of the
solid particles (γ s) are quite stable in the studied area and vary between 26 and
29 KN/m3 for a natural water content comprised between 10% and 20%. The
modified proctor test gives an optimal water value (Wop %) comprised between
8% and 12%. Dry density values (γ d) varied between 18 and 30 KN/m3.
The bearing capacity of the materials is good (30