Valorization of uncontaminated dredged marine sediment through sand substitution in marine grade concrete

• Published in: European journal of environmental and civil engineering Vol. 27; no. 13; pp. 4008 - 4025
• Main Authors: Hayek, Mahmoud, Soleimani, Tara, Salgues, Marie, Souche, Jean-Claude, Garcia-Diaz, Eric
• Format: Journal Article
• Language: English
• Published: Taylor & Francis 03.10.2023
• Subjects: Chemical Sciences; concrete properties; Dredged marine sediments; estimated lifetime; marine concrete; Material chemistry; potential durability; sand substitution; valorization; Concrete properties; Potential durability; Sand substitution; Dredged marine sediments; Estimated lifetime; Marine concrete; Valorization
• ISSN: 1964-8189; 2116-7214
• DOI: 10.1080/19648189.2023.2168765

Marine sediment disposal is an important economic and environmental issue worldwide. In order to minimize these discharges and optimize resources through a circular economy approach, this study discusses the potential use of fine marine sediments without treatments as a sand substitute in the marine concrete class (XS2, C30/37). The Dreux-Gorisse method was applied to find the concrete formulation containing 10, 20, 30, 40 and 50% sediment by weight. The results show that an XS2 concrete C30/37 with a water to binder ratio of 0.55 could be designed with 10% of sediment replacement content without significantly affecting the concrete properties. However, the optimization of concrete mix design shows that marine concrete (XS2, C30/37) could be designed with 30% of sediment replacement content without significantly affecting the potential durability and the estimated lifetime of the concrete structure.