Method for shredding portions of bituminous material into recyclable granules

A method for shredding portions of bituminous material in a solid state into recyclable granules in the solid state, wherein the recyclable granules have dimensions that are smaller than dimensions of said portions of bituminous material, the method comprising:

• pushing said portions of bituminous material into a perforated tubular body comprising a perforated cylindrical liner having a longitudinal axis, in such a way as to force the bituminous material by compression to come out through the holes of said perforated tubular body so as to obtain a plurality of substantially filiform extruded portions of said bituminous material;
• and
• cutting said extruded portions coming out of said holes of said perforated tubular body in such a way as to obtain granules having dimensions smaller than the dimensions of said portions of bituminous material;
• compressing said portions in such a way as to obtain a compact agglomerate set substantially sharing said longitudinal axis;
• compressing said portions into a variable-volume chamber, which comprises two side walls set parallel to said longitudinal axis, at a distance from and facing one another;
• and
• displacing one of said walls towards the other side wall along an axis substantially transverse to said longitudinal axis.