Experimental characterization of the mechanical properties of fully bio-based binderless particleboards

This thesis investigates the physical and mechanical properties of fully bio-based binderless particleboards produced from renewable biomass and agricultural residues. The panels were manufactured using a hemp based matrix combined with different natural aggregates, including Giant Reeds, bamboo, hemp, flax, digestate, and hazelnut shells. To evaluate the influence of processing conditions, boards were pressed at three different pressures: 0.2, 0.5, and 1.0 MPa. Mechanical characterization was carried out through internal bond, surface soundness, and three-point bending tests in accordance with EN standards Results showed that increasing pressure generally improved panel density and mechanical performance across all material types. Among the tested formulations, the hemp-based panel with a higher binder ratio (hemp C/60) achieved the best overall performance, exhibiting the highest density and bending strength. The study demonstrates that binderless particleboards made from renewable biomass can provide adequate mechanical properties for non-structural indoor furniture applications while eliminating formaldehyde emissions and promoting sustainable material use.