Compacted soils are important for geotechnical engineering investigation due to their complex behavior and broad applicability in geotechnical structures. However, compaction in clay soils is a topic that still has not been completely understood due to the difficulty of measuring the principal state variables involved during compaction and after it. The evolution of these state variables has strong importance for understanding the behavior of compacted soils and for characterizing their mechanical and hydraulic properties. Therefore, a new one-dimensional consolidation equipment for modelling the behavior of compacted soils has been designed. This device can reproduce one-dimensional compaction while principal mechanical properties are observed. Also, this apparatus allows obtaining undisturbed samples after the compaction process. The principal features of the equipment are presented in this article as the results of different tests using speswhite kaolin. A new laboratory testing methodology for compacted clay soils research is proposed, supporting known insights and providing new ones.