Durability of sustainable marine sediment concrete

• Published in: Developments in the built environment 2023-03, Vol.13, p.100118, Article 100118
• Main Authors: Yao, J.J., Chu, S.H.
• Format: Article
• Language: English
• Subjects: Durability; Marine construction; Marine dredged sediment; Marine sediment concrete; Strength; Sustainable concrete
• ISSN: 2666-1659; 2666-1659
• DOI: 10.1016/j.dibe.2022.100118

The coastal engineering of land reclamation is increasingly important for space retention and creation in the context of sea-level rise and limited land area in coastal regions. Meanwhile, a huge amount of marine dredged sediment (MDS) is generated annually and disposed of as waste, causing serious environmental problems. To minimize such disposal and turn waste into resources for coastal engineering, MDS can be upcycled for in-situ marine sediment concrete (MSC) production. As a major concern, the durability of MSC remains elusive with an inadequate scientific understanding. In this paper, the durability of concrete involving MDS was investigated comprehensively from three aspects: physical attack, chemical attack, and inner quality. The accessible porosity was identified as the key factor affecting the durability of MSC. Practical measures were explored for the durability design of MSC. This study can pave the way for the sustainable use of MDS for marine construction, coastal protection, and land reclamation. •The durability of marine sediment concrete was comprehensively investigated.•Novel use of marine dredge sediment for durable marine construction is explored.•The key aspects of physical and chemical attacks and inner quality were categorized.•The accessible porosity was identified as the key factor affecting the durability of MSC.•Measures to enhance the durability of practical marine sediment concrete were discussed.