TITLE:
Resilient Modulus of Compacted Lateritic Soils from Senegal at OPM Conditions
AUTHORS:
Fatou Samb, Meissa Fall, Yves Berthaud, Makhaly Bâ
KEYWORDS:
Gravel Lateritic Soils; Resilient Modulus; Mechanical Behaviour; Pavement; Cyclic Triaxial Test; Mechanistic Design
JOURNAL NAME:
Geomaterials,
Vol.3 No.4,
October
25,
2013
ABSTRACT: Repeated load triaxial tests were
performed on five compacted gravel lateritic soils collected from different locations
in Senegal: Sébikotane, Dougar, Pa Lo, Mont-Rolland and Ngoundiane. The study
revealed that resilient modulus decreases with the increase of the bulk and deviatoric stress in constant
confining pressure. In addition, resilient modulus increases with the
percentage of cement for appreciably equal contents of moisture. This effect tends
to stop for higher stress. Besides, correlations were made with some models of resilient modulus
such as the Uzan-Witczack model (Witczack
and Uzan, 1988 [1]) and the National Highway Research Program (NCHRP) model
(2004 [2]). The study confirms that both models give very
good results with the best
correlations being obtained with the Uzan-Witczack model.