Sustainability urges the construction industry to search for alternative but suitable materials. To evaluate the applicability of these materials, engineers should conduct tests and predictive models. Shear stress – strain behavior of soils and geo-materials is important in the analysis of slope stability of embankment. Dilative and contractive phases are encountered in sandy and non-plastic types of material. While constitutive models are commonly used to predict the behavior of these materials, these models requ…