Physical and Combustion Characteristics of Briquettes Made from Water Hyacinth and Phytoplankton Scum as Binder

Table 3

Coefficient of static friction.

Binder ratio	Galvanised steel	Rubber	Plywood sheet	Aluminium sheet
90 : 10	0.47 (±0.02)	0.48 (±0.03)	0.56 (±0.02)	0.43 (±0.01)
80 : 20	0.46 (±0.01)	0.44 (±0.02)	0.51 (±0.03)	0.37 (±0.01)
70 : 30	0.41 (±0.05)	0.44 (±0.03)	0.49 (±0.01)	0.38 (±0.03)
60 : 40	0.37 (±0.03)	0.38 (±0.01)	0.45 (±0.04)	0.33 (±0.05)
50 : 50	0.35 (±0.04)	0.34 (±0.02)	0.43 (±0.03)	0.31 (±0.03)