The consolidation test for investigating the deformation behaviour of soils constitutes one of the main foundations for calculating the settlements of buildings. Despite the rapid development of instrument engineering and data collection in the last century, consolidation tests are mainly conducted with mechanical consolidation apparatus. The procedure for consolidation testing has also not changed, despite new scientific knowledge in its field. This thesis begins with the historic background of consolidation testing and the current state of the art, with particular regard to present-day consolidation apparatus and the different experimental procedures of consolidation testing. The theory of one-dimensional consolidation is then being focused on as foundation for consolidation testing, and the standard-incremental-loading (STD) consolidation test- according to the ÖNORM B 4420 - is described. The time-consolidation behaviour, used for describing the temporal deformation properties of soils, will also be scrutinised. The chapters to follow illustrate the testing methods, the different loading rates and the different consolidation devices. The results of the stress-deformation behaviour of the single compression tests are first compared within their respective test series - with regard to their reproducibility - and then with the results in subsequent testing boundary conditions. In cases of deviation, potential influencing factors are described. Finally, the findings from the results, comparisons, and interpretations of the conducted consolidation tests are outlined in the synopsis.