Compression strength properties of gypsum matrix composites with recovered fibrous scrap materials from post-consumer tyres

Gypsum-based experimental cylindrical samples were prepared using three fractions of recycling tyre 'fluff' material ('as received', fractions >4 mm and 4 mm, where they were the lowest, and between 0.39-4.22 N/mm2 for the 'fluff' fraction 'as received' during recycling, where they were intermediate. Calculations of the required compressive strength in the case of using 'gypsum-fluff' building bricks in interior walls showed that all 'gypsum-fluff' combinations exhibited the adequate strength to perform successfully.