Finite element simulation of bacterial self-healing in concrete using microstructural transport and precipitation modeling

Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)

Published: May 6, 2025

Abstract Bacteria-based self-healing concrete has emerged as a promising solution for enhancing structural durability by autonomously repairing cracks. However, the underlying transport mechanisms of healing agents and efficiency mineral precipitation remain inadequately modelled. This study presents finite element modelling (FEM) approach to simulate diffusion reaction kinetics bacterial in microstructures. X-ray micro-computed tomography (Micro-CT) meshes were utilized accurately represent crack pore geometries, while diffusion-reaction equation governing calcium carbonate (CaCO 3 ) was numerically solved using FEniCS. Key input parameters, including coefficients, rates, efficiencies, extracted from literature ensure model validation. Simulations reveal that agent concentration follows nonlinear pattern, with influenced geometry metabolic activity. Heatmaps contour plots highlight dispersion, time-dependent analysis indicates 65.5% closure under optimal conditions. The proposed effectively replicates experimental trends, demonstrating its applicability predicting performance realistic provides computational framework can be extended optimize bacteria encapsulation strategies, kinetics, long-term assessments concrete.

Language: Английский

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Experimental study of natural self-healing of hydraulic concrete at different pre-damage ages

Case Studies in Construction Materials, Journal Year: 2025, Volume and Issue: unknown, P. e04749 - e04749

Published: May 1, 2025

Language: Английский

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Self-healing properties of cement-based materials in different matrix based on microbial mineralization coupled with bimetallic hydroxide

Construction and Building Materials, Journal Year: 2023, Volume and Issue: 400, P. 132686 - 132686

Published: Aug. 5, 2023

Language: Английский

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Effect of bacteria on uncracked concrete mechanical properties correlated with damage self-healing efficiency – A critical review

Developments in the Built Environment, Journal Year: 2023, Volume and Issue: 17, P. 100301 - 100301

Published: Dec. 16, 2023

Self-healing concrete has established its effectiveness in repairing cracks, ultimately leading to improved durability. Additionally, there is a need ensure that other crucial mechanical properties, particularly the strength of intact (uncracked) material, remain uncompromised. Despite CaCO3 precipitation being primary component bacterial reaction product responsible for healing cracks and enhancing strength, leveraging effect bacteria on concrete's properties could be subjective, given several factors influence either positive or an adverse manner. Existing reviews topic predominantly focus self-healing performance (post-damage recovery), with none published dedicated, purely, cementitious/concrete material. This paper impact control (intact) mortar under various conditions, without incorporation materials such as fibers, carriers, aggregate replacement, cementitious material replacement. Since concretes strong attributes but poor would unsuitable structural applications, detailed correlation between before after activation discussed. Research gaps are identified, outlook future research presented, along perspective concrete/cementitious production robust properties. The study also contributes addressing one identified – generalized index incorporates both efficiency proposes typical model illustrates application using numerous existing experimental results performance. sheds light overall

Language: Английский

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Microbial self-healing of cracks in cement-based materials and its influencing factors

Frontiers of Structural and Civil Engineering, Journal Year: 2023, Volume and Issue: 17(11), P. 1630 - 1642

Published: Nov. 1, 2023

Language: Английский

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