The Effect of recycled rubber aggregates from used tires on the physical and mechanical properties of HN31 sand

Abstract

The volume of used tires is increasing significantly, posing a major environmental challenge, particularly due to their storage in landfills. This paperwork explores the valorization of rubber aggregates derived from the recycling of used tires by incorporating them into soil, offering a promising solution for civil engineering applications. The objective of this study is to investigate the effect of rubber aggregates on the shear strength of Hostun sand. A series of direct shear box tests (NF P 94-071-1) was conducted in the laboratory on HN31 sand mixed with various mass fractions of shreded rubber aggregates ranging from 0 to 40%. The direct shear tests were carried out on samples compacted at an initial relative density D_r = 55% and tested after a consolidation phase following an identical loading/unloading cycle. The results indicate that the rubber aggregate content influences the compressibility and shear strength of the sand.