ABSTRACT
This paper deals with the mechanical behavior of a sand grouted with a cement-based grout. The injected sand is viewed as a composite material comprising two distinct phases: the initial granular soil and the solidified grout matrix which cements the grains together. As a result, a multi-scale modelling approach, the Homogenization Method of Periodic Structures, has been employed in order to characterize the macroscopic behavior of the treated medium. The damage behavior of the grout material is investigated by relying on experimental tests found in the literature. The numerical resolution of the cellular problems is performed by the Finite Element Method. The computation of the homogenized coefficients and the resulting macroscopic relationship obtained between the equivalent strains and stresses allow to display the strong nonlinearity of the mechanical behavior induced by the heterogeneous microstructure and the grout damage.
