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

Author:

Hayek Mahmoud123ORCID,Soleimani Tara4ORCID,Salgues Marie1ORCID,Souche Jean-Claude1ORCID

Affiliation:

1. LMGC, University of Montpellier, IMT Mines Ales, CNRS, 30100 Ales, France

2. Department of Civil Engineering, Université de Sherbrooke, 2500 Blvd. de l’Université, Sherbrooke, QC J1K 2R1, Canada

3. Department of Biology, Université de Sherbrooke, 2500 Blvd. de l’Université, Sherbrooke, QC J1K 2R1, Canada

4. HSM, University of Montpellier, IMT Mines Ales, CNRS, IRD, 30100 Ales, France

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 CO2 emissions for SCC made with marine sediment.

Funder

Prefecture of the Occitanie Region

the Occitanie Réegion

the European Union

Publisher

MDPI AG

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