Self-healing concrete with a bacteria-based or crystalline admixture as healing agent to prevent chloride ingress and corrosion in a marine environment

被引：8

作者：

Cappellesso, Vanessa Giaretton ^{[1
,2
]}

Van Mullem, Tim ^{[1
]}

Gruyaert, Elke ^{[2
]}

Van Tittelboom, Kim ^{[1
]}

De Belie, Nele ^{[1
]}

机构：

[1] Univ Ghent, Fac Engn & Architecture, Dept Struct Engn & Bldg Mat, Magnel Vandepitte Lab, Technol Pk Zwijnaarde 60, B-9052 Ghent, Belgium

[2] Katholieke Univ Leuven, Dept Civil Engn Mat & Construct, Ghent Technol Campus,Gebroeders Smetstr 1, B-9000 Ghent, Belgium

来源：

DEVELOPMENTS IN THE BUILT ENVIRONMENT | 2024年 / 19卷

基金：

欧盟地平线“2020”;

关键词：

Self -healing concrete; Healing agents; Corrosion; Chloride; Marine environment; Concrete durability; CALCIUM-CARBONATE; CRACKED CONCRETE; PART I; STEEL; PARAMETERS; CAPABILITY; PHASE; WIDTH;

D O I：

10.1016/j.dibe.2024.100486

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

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 mu m and 300 mu m 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 mu m. This highlights the potential of customized self-healing solutions to improve concrete durability in marine environments.

引用

页数：23

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