In the present study, the mechanical properties of granular biomass of pine origin (sawdust, shavings, long shavings and pellets) were determined. The bulk and tapped densities were determined in a cylindrical chamber. The compacted density was measured, and the influence of the moisture content on this quantity was examined in a vane tester. The flowability and strength properties were determined using a direct shear tester (Jenike box) 210 mm in diameter and standard Schulze ring shear tester. The tests in the Jenike tester complied with the Eurocode 1 procedure for normal pressure (σ n) of 15 and 30 kPa and speed of shearing of 0.17 mm s −1. Ring shear testing was conducted using a Schulze annular shear cell of 195 mm outer diameter. Tests were performed for 10 and 20 kPa pre-shear σ n. A prototype vane tester was constructed for determining the torque, shear strength, and relaxation of a consolidated sample of granular biomass. σ n was exerted by a pneumatic system with a rubber air spring and yoke. The torque and density were measured for moisture content in the range of 10-50% and for σ n in the range of 5-30 kPa. The torque was observed to be affected by σ n and the moisture content, whereas no relationship between the torque and the rotational speed was observed.
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