To evaluate whether the framework of European standards, regarding the grading requirements, is adjusted to be used in the compaction control of unbound limestone materials for base and sub-base layers of road pavements a laboratory test program was envisaged. According to the Portuguese practice, two distinct approaches are used. An approach takes into account the nature of the compacted materials and its potential density. The other one requires that a target value for the density of the compacted material is reached, but it does not take into account if the grading of the material allows reaching that target density. Practice has shown that materials meeting the grading requirements of the specifications do not reach the target void index. To evaluate the void ratio variations five grading representative of an all-in aggregate, of category GA and size 0/20 mm, included in the range defined by the standard EN 13285 were prepared. The steps and constrains required to obtain the five different gradings is presented. The all-in aggregate was collected at a quarry and processed in order to separate the different particle size. The procedure used to rebuild the five grading using the individual particle sizes previously separated is explained and illustrated.