Compressive strength tests simulate the compressive stress due to
the weight of the top pellets on the lower pellets during storage in
bins or silos and the crushing of pellets in a screw conveyor. Impact resistance
tests simulate the forces encountered during the emptying of
fuels from trucks onto ground or from chutes into bins [1]. Li and Liu
[11] found that the maximum value of the compressive resistance of
biomass logs (48.5mmdiameter, 50.0mmlength) was 49MPa and observed
that sawdust logs were squeezed (shortened) by approximately
1/3 of the size before the final failure occurred. Theymentioned that increasing
the pressure increased the durability, impact resistance and
compressive resistance of logs. Demirbas [12] found that the compressive
strength of waste paper briquettes increased with an increase in
the briquetting pressure and moisture content.