Influence of grouts on unconfined creep behaviour of grouted Fontainebleau sand: experimental study and primary creep modelling

This article deals with the creep behaviour of two new grouts—a cement-based grout and a mineral-based grout—in comparison with silicate grout. Results show that Fontainebleau sand grouted with new grouts presents few creep strains whereas silicate grout causes sand to become viscous. Long-term unconfined creep tests are performed on grouted sand for creep study and creep limit determination. Creep curves prove that new-generation grouted sands are stable over time. Primary creep modelling was done with the Singh and Mitchell law for all grouted sands, and parameter values were discussed. A parametric study makes evident the influence of the different parameters of this model. Cet article traite du comportement au fluage de deux nouveaux coulis, l'un a base de ciment et l'autre d'origine minerale, par comparaison avec le gel de silice. Les resultats obtebus montrent que le sable de Fontainebleau injecte avec ces nouveaux coulis presente peu de deformations par fluage alors que le sable injecte au gel de s...