| Title | Characterization of recycled dredged Sediments: Toward circular economy in road construction |
|---|---|
| ID_Doc | 28384 |
| Authors | Almokdad, M; Zentar, R |
| Title | Characterization of recycled dredged Sediments: Toward circular economy in road construction |
| Year | 2023 |
| Published | |
| Abstract | Granular solid materials are essential for civil engineering projects, but their limited availability and environmental impacts have resulted in exploring alternatives aligned with sustainable development. Utilizing waste materials as dredged sediments offer promising solutions for more sustainable construction practices, especially in road construction. However, end-of-life management of these materials remains a challenge, requiring a circular approach to ensure their sustainable use. This research aims to evaluate the viability of revalorization of recycled sediments (RSD) from a demolished road after its failure for their second use in road structures compared to the first valorization of raw sediments (SD). The usability and environmental acceptability were evaluated through physical, mechanical, durability, and environmental testing. The physical properties of RSD show lower particle density (2.55 g/cm3) than SD (2.59 g/cm3), and have less organic matter content and a non plastic behavior. The immediate California bearing ratio (I-CBR) after solidification/stabilization treatment was around 165% higher for RSD than SD. The mechanical and durability performances of RSD were also better than SD in terms of water sensitivity and frost resistance, as well as at different curing ages 7, 28, 60, and 90 days. Additionally, the environmental leaching behavior of the trace elements in RSD matrix before and after treatment differed from SD, indicating varying road uses' applicability. The findings highlight the potential of utilizing various wastes in constructions, thus promoting a closed-loop circular approach and reducing the need for virgin resources. |
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