Table 2.

Flow properties based on compressibility index and angle of repose [25]

Compressibility index (%)	Angle of repose (°)	Flow character
≤10	25-30	Excellent
11-15	31-35	Good
16-20	36-40	Fair
21-25	41-45	Passable
26-31	46-55	Poor
32-37	56-65	Very poor
>38	>66	Very, very poor