Utilization of demolition wood and mineral wool wastes in wood-plastic composites

Petri Jetsu (Corresponding Author), Markku Vilkki, Ismo Tiihonen

Research output: Contribution to journalArticleScientificpeer-review

2 Citations (Scopus)
166 Downloads (Pure)


Wood and mineral wool fractions from demolished buildings were sorted into different categories and processed to the suitable grain size needed for the manufacturing of wood-plastic composites. Processed construction and demolition waste materials mixed with plastics and additives were extruded into hollow test bars using a conical rotary extruder. Test specimens needed for measurements were cut from test bars. The results showed that the mechanical performance of wood-plastic composites based on construction and demolition waste wood, and mineral wool was at a good level and comparable to commonly used wood-plastic composites in decking applications. The highest strength properties of wood-plastic composites were achieved with a plywood fraction and the lowest with materials containing a particle/fibre board fraction. The mechanical performance can be improved by utilizing mineral wool in the formulation of wood-plastic composites. A material mixture containing several wood fractions as well as mineral wool also gave good strength properties. Only a minor reduction in strength properties was measured when recycled plastic was utilized meaning that wood-plastic composites suitable for many types of applications can be produced entirely from recycled materials.

Original languageEnglish
Pages (from-to)19-25
Issue numberJune
Publication statusPublished - Jun 2020
MoE publication typeA1 Journal article-refereed


This research is part of the HISER project (www.hiser-project.eu). The HISER project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No. 642085.


  • Demolition waste mineral wool
  • Demolition waste wood
  • Extrusion
  • Mechanical properties
  • Wood-plastic composites


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