Advancing Circular Economy: Utilizing Shredded Scrap Tyres in Gabion Wall Construction

Abstract:

The global accumulation of scrap tyres presents a growing environmental and public health challenge due to their resistance to degradation and limited recycling options. Addressing this issue through innovative reuse strategies is vital for advancing sustainable construction practices. This study explores the integration of shredded scrap tyres as a lightweight fill material in gabion wall construction, promoting circular economy principles by transforming waste into a valuable engineering resource. A novel method was developed using shredded tyres, cut into pieces measuring 100 mm × 50 mm, mixed with rockfill (75–100 mm in size), and placed within gabion units. The structural behavior of these modified gabions was analyzed with a focus on lateral and vertical displacement patterns, bulging behavior, and overall stability. Factor of safety calculations indicated that a gabion unit with a height and depth of 3 meters could achieve a significant unit weight reduction up to 8.2 kN/m³ compared to conventional rockfill gabions, which typically weigh between 15 and 19 kN/m³. The introduction of tyre pieces resulted in a void ratio of approximately 0.4, suggesting effective packing and compaction. The lightweight gabion units demonstrated the capacity to safely support the load of three stacked units without significant deformation, validating their structural integrity for practical applications. To maintain optimal performance, it is essential to keep the unit weight at or below 8.2 kN/m³ and ensure a void ratio between 0.3 and 0.4. Further testing is recommended to evaluate compatibility across varying rock and tyre densities. Overall, this research highlights a sustainable and cost-effective approach to scrap tyre reuse, contributing to resource efficiency, waste reduction, and the development of eco-friendly materials for retaining wall applications in civil engineering.

• Periodical: Advances in Science and Technology (Volume 177)
• Pages: 93-100
• DOI: https://doi.org/10.4028/p-bQbiw4
• Online since: May 2026
• Authors: Udeni Priyantha Nawagamuwa*, Chathurangani De Silva Bavindi
• Keywords: Earth Retaining Structures, Gabion Walls, Recycling, Scrap Tyres

References

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DOI: 10.1520/gtj10355j

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