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The physical properties of the materials used and the different layers of these materials to build the road are presented in this section. The materials and the structure of the pavement have been selected based on their physical properties and the physical properties of the support soil in the Project area, mainly marine sand. Standards used for this design is NF P98-086 of May 2019

Table 2.3: Pavement structure for the Route de l’Esclave
Layer Material Thickness Module (Mpa) Poisson Coefficient

Base Course - bearing BC5g 21cm 35 000 0.20
Foundation layer GNT 0/31.5
or 0/20 15cm 400 0.35
(2.5 x Module couche inférieure et plafonnée à 400 MPa)
Form Layer Silty or 20cm 160 0.35
gravelly (2 x Module couche inférieure et plafonnée à 200 MPa
lateritic
sand

Supporting floor Soil in place - 80 0.35
or backfill
BC5g : Cement concrete class 5 dowelled
GNT 0/31.5 ou 0/20 : Untreated gravel with a grain size of 0/31.5 or 0/20.