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Updated: Jan 26, 2026

The Effect of Construction and Demolition Waste Plastic Fractions on Wood-Polymer Composite Properties
Published on: June 7, 2020
Composition of Plastic Fractions in Waste Streams: Toward More Efficient Recycling and Utilization
Ville Lahtela1,2, Marko Hyvärinen3, Timo Kärki4
1LUT RE-SOURCE Research Platform, LUT University, P.O. Box 20, FI-53851 Lappeenranta, Finland. ville.lahtela@lut.fi.
Abstract:
Reuse of materials is a significant global goal that contributes to sustainable development. Polymer-specific plastic identification from the waste stream is examined in this study to achieve environmentally optimistic reuse of plastic material in secondary applications. Two diverse waste streams, 86.11 kg of construction and demolition waste (CDW) plastic and 57.74 kg of mechanically sorted plastic, were analyzed by using a handheld tool whose identification technology was based on the near-infrared spectrum. The study indicates a significant effect of human and single fraction on manual separation. The polymer composition in the plastic waste stream varied depending on the source, but the most common plastic grades, polypropylene (PP) and polyethylene (PE), were represented in every waste stream. The waste stream also included unidentified and unfavorable wastes, which indicates that identification of the plastic fractions is needed and more studies should be done in this field in the future.
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