ABSTRACT: Soil liquefaction has been extensively defined via the laboratory and in-situ tests, regarding to eitherthe generation of excess pore water pressure or the soil vertical strain reaching a particular level under isotropic and anisotropic conditions. In this study, concolidated-drained anisotropic loading conditionswere applied herein to simulate the stresses under a shallow foundation at representative depths. Threedifferent particle size of sandy soils with two different relative density conditions were adopted for thesaturated drained cyclic tests. The number of cycle load (26 cycles) within a frequency of 1second waschosen depending on a constant earthquake magnitude. The variation of axial strain during the tests wasmonitored in order to evaluate the liquefaction behaviour of the three types of the sands. The axial strainis found to be relative density dependent. Ione sand and beach sand samples could not reach the initialliquefaction state due to dilation. Especially, the least uniform and coarsest concrete sand with 90 %relative density tends to liquefy based on the axial strain