What are Flakiness Gauge used for?
The Flakiness (Thickness) gauge is used to determine if the aggregate particles are to be considered as flaky, i.e. Their thickness is less than 0.6 of their nominal size. The aggregate to be classified is separated into seven sieve fractions.
Flakiness gauge according to TMH 1 Method B3 (BS 812)
| Minimum Length of Slot | Width of Slot |
| 150,0 mm | 37,5 mm |
| 126,0 mm | 31,5 mm |
| 106,0 mm | 26,5 mm |
| 75,0 mm | 18,75 mm |
| 53,0 mm | 13,25 mm |
| 38,0 mm | 9,5 mm |
| 26,4 mm | 6,7 mm |
| 19,0 mm | 4,75 mm |
| 13,4 mm | 3,35 mm |
Flakiness gauge according to SANS 3001-AG4: 2009
| Minimum Length of Slot | Width of Slot |
| 150,0 mm | 37,5 mm |
| 100,0 mm | 25,0 mm |
| 75,0 mm | 18,7 mm |
| 50,0 mm | 12,5 mm |
| 40,0 mm | 10,0 mm |
| 27,0 mm | 7,0 mm |
| 20,0 mm | 5,0 mm |
| 15,0 mm | 3,5 mm |