Development of the new more environmentally friendly materials, has stronger in the last decade. There is an introduction of new natural materials in construction, such is mycelium composite. Mycelium is a vegetative tissue of the fungi, which is grown on a nutrient rich substrate. Fungi are one of the oldest, biggest and wide spread organism on the Earth. In such composites, we can use agricultural by-products or waste, based on lignocellulose compounds. Because of these natural compounds, these composites are ecologically friendly and have a low price. Because being relatively new, there are not many collected data on the properties of these composites. In this research, we made 6 different mycelium composites. They berated in substrate fraction and fungi species. We evaluated their manufacture and comparing their physical and mechanical properties with commercially accessible insulation made from wood fibbers. We determined density of all these materials with three different procedures. We tested their compression strength, water uptake, surface energy and fire resistance. We found out that mycelium composites are comparable on all of those areas with reference materials. Average density 0,274 g/cm3, angle of wetting after 15 s is about 120 °. The best composite was made from the fungi Schizophyllum commune and rough substrate; 175 % water share after 24 hours of soaking, the smallest weight loss in fire exposure (2,4 g) and highest modul of elasticity in compression test (0,71 MPa).
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