Table 1.

Sample density, bulk density and porosity for P. niruri.

Particle size (mm)	Sample density ρs (kg/m3)	Bulk density, ρb (kg/m3)	Porosity, ε
0.3–0.5	1435.13 ± 3.88	260.16 ± 3.13	0.82
0.5–3	1275.77 ± 3.88	177.48 ± 2.45	0.86

 ± Standard deviation for three replicates.