A state parameter of cement admixed clay with different stress paths

Abstract

ABSTRACT This paper presents an appropriate physical parameter for cement admixed clay, termed as the state parameter that combines the influence of void ratio, stress level, and cement content reference to an ultimate (steady) state. Data from a triaxial testing program on Pasak Clay with different stress paths was presented and demonstrated to be dependent on the state parameter. The strength and pore water pressure at the failure of cement mixed clay were directly associated with mean stress and decreasing state parameters. The 3-D surface for deviatoric stress, mean stress, and state parameter at certain distortional strains was proposed based on a stress path triaxial test. The stiffness of cement-treated clay increased with a decreasing state parameter and increase in mean stress. The concept of state parameter is a basic physical concept and has broad application as an empirical normalising parameter and constitutive modelling of soil behaviour.