Bulk density and compactibility of bulk materials play an important role in process engineering. Reliable data are required for dimensioning plants and for supplying load data for static design. Furthermore, the data are useful for the production of sintered materials or catalyst beds and the characterization of bulk materials. While compression by normal stress can be reproduced and mathematically described, the influence of shocks and vibrations remains very poorly understood. All known standard methods for bulk material compression under vibrations and shocks are based on individual equipment. The parameters of shocks or vibrations, however, have not yet been defined. Therefore, an investigation was carried out to examine the influence of uniaxial stress and defined shocks and vibrations on bulk material compression. The shocks and vibrations were controlled by an electrodynamic shaker. The first results for highly disperse Kaolin powders are presented. Using the chosen parameters, the random mode and the uniaxial compression cause the highest increase in density. High compression rates can also be obtained by shocks. With sinusoidal vibrations much lower bulk densities can be reached.