Utilizing Fine Marine Sediment as a Partial Substitute for Sand in Self-Compacting Concrete Specially Designed for Application in Marine Environments

Mahmoud Hayek (), Tara Soleimani, Marie Salgues and Jean-Claude Souche
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Mahmoud Hayek: LMGC, University of Montpellier, IMT Mines Ales, CNRS, 30100 Ales, France
Tara Soleimani: HSM, University of Montpellier, IMT Mines Ales, CNRS, IRD, 30100 Ales, France
Marie Salgues: LMGC, University of Montpellier, IMT Mines Ales, CNRS, 30100 Ales, France
Jean-Claude Souche: LMGC, University of Montpellier, IMT Mines Ales, CNRS, 30100 Ales, France

Sustainability, 2024, vol. 16, issue 6, 1-13

Abstract: The disposal of marine sediments poses a significant economic and environmental challenge on a global scale. To address this issue and promote resource optimization within a circular-economy paradigm, this research investigates the viability of incorporating untreated fine marine sediments as a partial replacement for sand in self-compacting concrete (SCC) designed especially for application in marine environments (an exposure class of XS2 and a resistance class of C30/37 according to standard NF EN 206). The concretes mis-design incorporating 30% by weight of sediment as a sand substitute was initially designed with the modified Dreux–Gorisse method. The findings indicate that it is feasible to design an SCC suitable for marine environments, incorporating 30% sediment replacement content and without significantly compromising concrete properties, durability, or the estimated lifespan of the formulated concretes. The integration of marine sediment as a sand substitute into the SCC mix design reduces the amount of binder and limestone filler without compromising the paste volume. This results in a significant saving of natural sand resources and a reduction in CO 2 emissions for SCC made with marine sediment.

Keywords: marine sediments; valorization; sand substitution; self-compacting concrete; marine concrete; durability; estimated lifespan; CO 2 emissions (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2024
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