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Self-healing concrete with a bacteria-based or crystalline admixture as healing agent to prevent chloride ingress and corrosion in a marine environment Cappellesso, V.G.; Van Mullem, T.; Gruyaert, E.; Van Tittelboom, K.; De Belie, N. (2024). Self-healing concrete with a bacteria-based or crystalline admixture as healing agent to prevent chloride ingress and corrosion in a marine environment. Developments in the Built Environment 19: 100486. https://dx.doi.org/10.1016/j.dibe.2024.100486 In: Developments in the Built Environment. Elsevier: UK. e-ISSN 2666-1659, meer

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Beschikbaar in	Auteurs
VLIZ: Open access 411351 [ download pdf ]

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Trefwoorden

Corrosion Environments > Aquatic environment > Marine environment Marien/Kust

Author keywords

Self-healing concrete; Healing agents; Chloride; Concrete durability

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Auteurs		Top
Cappellesso, V.G. Van Mullem, T. Gruyaert, E., meer	Van Tittelboom, K., meer De Belie, N., meer

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Abstract

Innovative solutions are needed to improve the durability of concrete structures in marine environment. Bacteria-based agents (BAS) and crystalline admixtures (CA) are explored as healing agents to enhance chloride resistance and prevent corrosion. Healing of 100 μm and 300 μm wide cracks was investigated, in combination with two conditioning methods. Either the samples were subjected to wet/dry cycles for 3 months before exposure (“healed”), or they were directly exposed to artificial seawater after crack creation (“unhealed”). After 12 months of submersion, BAS reduced chloride ingress even in the presence of cracks but showed limitations in preventing corrosion in cracked samples. In contrast, the CA series demonstrated a reduction in chloride ingress in both uncracked and cracked concrete and effectively prevented reinforcement corrosion in healed samples and samples with cracks of 100 μm. This highlights the potential of customized self-healing solutions to improve concrete durability in marine environments.

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