Large Aggregates are those classified with a size greater than 9.5mm in accordance with ABNT NBR 7809:2019. In this test, the largest dimension possible to be measured in any direction of the grain must be considered, along with the smallest distance between the parallel planes, with the relationship between the average length, width and thickness of the grains.

Thus, it is possible to determine the shape index of the aggregates if they are: Cubic, Elongated, Lamellar and/or Elongated-Lamellar. Stratura Asfaltos is a pioneer company in high-performance asphalt mixture technology, providing the test to determine the shape index using the caliper method of coarse aggregates.