e effects of liquefaction are one of the most serious natural hazards observed for a long time around the world,
namely in seismically active regions and saturated sandy deposits. As a result, the study of the behaviour of soils susceptible to liquefaction is of the upmost relevance. The material used in this study is Coimbra sand (Portugal), which is an artificial and uniform soil susceptible to liquefaction. In this study, several compression tests were performed, under undrained conditions, with three
different types of equipment, namely two different triaxial apparatus and a Hollow Cylinder Apparatus, and different sample sizes. Although triaxial apparatus are often used to determine the behaviour and resistance characteristics of soils, they do not realistically reproduce the field conditions typically induced by earthquake loading. These limitations can be partly overcome by using the hollow
cylinder apparatus. The main objective of this work is to understand if the sample’s size and geometry influence the sand behaviour under compression in undrained conditions.