INFLUENCE OF FRACTIONAL COMPOSITION AND AVERAGE DENSITY ON THE THERMAL CONDUCTIVITY COEFFICIENT OF PROCESSED ASPEN BARK
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Abstract
The article studies the granulometric composition of aspen bark, crushed in a dry and moist state, and determines the percentage content of bast fibers and bark particles by fraction. The effect of the fractional composition and average density of structure-forming materials from aspen bark, including bark particles and bast fibers, on the thermal conductivity of the resulting compositions is studied. It was found that the greatest thermal insulation effect is achieved with thin fibers of 0.5–2.5 mm in length, fractions of 0.16–0.63 mm and 0.63–1.25 mm of the bast layer of the bark. With an aspen bark bast fiber density of 125–175 kg/m3, the thermal insulation compositions provide a thermal conductivity of 0.044–0.046 W/(m∙°C).
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References
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