Table 2.

Parameters of the abrasion tests performed on the samples collected at plants A and B.

Sample ID	Processing Unit	Duration (min)	Plant A (2–40 mm)	Plant B (4–26 mm)
Raw	Untreated sample	-	✓	✓
CM	Concrete Mixer	240	✗	✓
Abr. 60	Sieving drum	60	✓	✓
Abr. 120	Sieving drum	120	✓	✓