Abstract
This study reports the influence of fly ash on the operational, technological, and physical-mechanical properties of composites based on secondary high-density polyethylene filled with wood flour. It is shown that when calcite is replaced by fly ash in the composite, the operational and technological properties of the material are improved: water absorption, coefficient of linear thermal expansion and technological shrinkage are reduced. When using fly ash as a filler, there is also an increase in the flexural strength of the composite by 9% (from 51.3 MPa in the absence of fly ash to 55.8 MPa in the absence of calcite), but the Charpy impact toughness of samples with cut is decreased by more than 2 times (from 11.9 kJ/m2 to 5.1 kJ/m2, respectively).
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