ABSTRACT
The quality of subgrade soils influences the design of road structures. The maximum dry unit weight is used to assess the quality of compacted soil materials. The standard or modified Proctor tests do not exactly simulate the field compaction mechanism. Standard Proctor compaction curves are presented, along with curves obtained using the gyratory compactor. The compaction curves are generally similar, regardless the rate of gyration and gyration angle. For moistures higher than the optimum, gyratory specimens yielded densities higher than those from the Proctor compaction. Based on this observation, the gyratory compaction could be considered a feasible means of laboratory compaction. The difference between the two compaction modes was greater at low moistures. California Bearing Ratio specimens prepared with dynamic or gyratory compaction had lower values with an increase in moisture contents and greater in the case of dynamic compaction. Most results confirm theoretical indications or findings of previous researches.
