Utilization of recycled mineral wool as filler in wood–polypropylene composites

• A new recycling method for underutilized waste fraction is presented.
• Properties of the composites utilizing recycled mineral wool as filler are presented.
• Recycled mineral wool improved the moisture resistance properties of the composites.

The construction and demolition (C&D) industry is a major source of waste. Environmental regulations and laws have been implemented in many countries to improve and encourage the recycling of C&D waste. To meet tightened regulations, new C&D waste recycling methods must be developed. Mineral wool is a waste fraction that is currently considered un-recyclable. In this study, the mechanical and moisture resistance properties of wood plastic composites utilizing recycled mineral wool as filler are presented. According to the findings, the addition of recycled mineral wool improved the moisture resistance properties of the composites noticeably, but a decrease in some mechanical properties was observed.