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

Authors: Dafni Foti; Stergios Adamopoulos; Eleni Voulgaridou; Costas Passialis; Elias Voulgaridis

Addresses: Department of Forestry and Natural Environment, Laboratory of Forest Utilization, Aristotle University of Thessaloniki, 541 24 Thessaloniki, Greece ' Department of Forestry and Wood Technology, Linnaeus University, Lückligs plats 1, 351 95 Växjo, Sweden ' Department of Forestry and Natural Environment, Laboratory of Forest Utilization, Aristotle University of Thessaloniki, 541 24 Thessaloniki, Greece ' Department of Forestry and Natural Environment, Laboratory of Forest Utilization, Aristotle University of Thessaloniki, 541 24 Thessaloniki, Greece ' Department of Forestry and Natural Environment, Laboratory of Forest Utilization, Aristotle University of Thessaloniki, 541 24 Thessaloniki, Greece

Abstract: Gypsum-based experimental cylindrical samples were prepared using three fractions of recycling tyre 'fluff' material ('as received', fractions >4 mm and <4 mm) in three proportions (10%, 20%, 30%) by weight. The density values of the samples were found to decrease with increasing the proportion of 'fluff' material incorporated in gypsum. Compressive strength and density of cylindrical samples were positively correlated for all combinations, and their relationships were found statistically significant. Compressive strength values ranged between 1.00-7.64 N/mm2 for the 'fluff' fraction <4 mm, where they were the highest, 0.37-1.59 N/mm2 for the 'fluff' fraction >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.

Keywords: gypsum; tyre 'fluff'; recycling; density; compressive strength; building material.

DOI: 10.1504/IJMPT.2020.111312

International Journal of Materials and Product Technology, 2020 Vol.61 No.1, pp.53 - 67

Accepted: 31 Jul 2020
Published online: 19 Nov 2020 *

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