Prediction of the residual void ratio of clayey soils after drying based on their initial state, physical properties and structure

Anticipating the advantages of using er rather than sr for use in constitutive modeling, Bardanis & Kavvadas (2006) proposed an empirical relation predicting er on the basis of tests on low to high plasticity clays and marls (Eq. 1). Residual void ratio er is predicted from the initial state of the soil, as expressed by initial void ratio when drying starts, eo, the physical properties of the soils, as expressed by their liquid limit wL and specific gravity Gs, and an empirical parameter m, found equal to 0.43.