Fedakar, Halil IbrahimRutherford, Cassandra J.Cetin, Bora2022-02-242022-02-2420211468-06292164-7402https //doi.org/10.1080/14680629.2021.1948908https://hdl.handle.net/20.500.12573/1176The first author would like to thank the Scientific and Technological Research Council of Turkey (TUBITAK) for the financial support of his postdoctoral research at the Department of Civil, Construction and Environmental Engineering, Iowa State University.This paper investigated the deformation behaviour of K-consolidated sand-clay mixtures through cyclic triaxial (CT) and hollow cylinder (CHC) tests. The sand-clay mixtures contained 0%, 5%, 10% and 20% clay by weight and were prepared at a relative density of 75%. Clay inclusion caused an increase in the permanent axial strain of mixtures (0.075% to 5% in CT and 0.186% to 5% in CHC), while a relatively insignificant increase in permanent axial strain was observed in the CT specimens containing 5% and 10% clay (0.075% to 1.299%). However, all CHC specimens with clay failed (epsilon(z) >= 5%). It was also observed that shear strain development of sand is significantly influenced by clay inclusion (0.096-2.241%) in CHC tests. Test results clearly show that the effect of a principal stress rotation should be taken into account to better estimate the deformation behaviour of sand-clay mixtures under repetitive traffic loads.enginfo:eu-repo/semantics/closedAccessHollow cylinder testprincipal stress rotationtriaxial testdeformationsand-clay mixturearticle