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A Numerical Study on Chloride Diffusion in Cracked Concrete
- Source :
- Crystals, Vol 11, Iss 742, p 742 (2021), Crystals, Volume 11, Issue 7
- Publication Year :
- 2021
- Publisher :
- MDPI AG, 2021.
-
Abstract
- The cracks in concrete are a fast transport path for chlorides and influence the service life of concrete structures in chloride environments. This study aimed to reveal the effect of crack geometry on chloride diffusion in cracked concrete. The chloride diffusion process in cracked concrete was simulated with the finite difference method by solving Fick’s law. The results showed that the apparent chloride diffusivity was lower in more tortuous cracks, and the cracks with more narrow points also showed lower apparent chloride diffusivity. For tortuous cracks, a higher crack width meant relatively more straight cracks, and consequently, higher apparent chloride diffusivity, while a lower crack width resulted in more tortuous cracks and lower apparent chloride diffusivity. The crack depth showed a more significant influence on the chloride penetration depth in cracked concrete than crack geometry did. Compared with rectangular and V-shaped cracks, the chloride diffusion process in cracked concrete with a tortuous crack was slower at the early immersion age. At the same crack depth, the crack geometry showed a marginal influence on the chloride penetration depth in cracked concrete during long-term immersion.
- Subjects :
- Materials science
General Chemical Engineering
Diffusion
crack width
0211 other engineering and technologies
020101 civil engineering
02 engineering and technology
Thermal diffusivity
Chloride
Tortuosity
0201 civil engineering
Inorganic Chemistry
crack depth
cracked concrete
021105 building & construction
medicine
General Materials Science
Composite material
Chloride penetration
Crystallography
Finite difference method
Condensed Matter Physics
Diffusion process
QD901-999
numerical simulation
Service life
tortuosity
medicine.drug
Subjects
Details
- Language :
- English
- ISSN :
- 20734352
- Volume :
- 11
- Issue :
- 742
- Database :
- OpenAIRE
- Journal :
- Crystals
- Accession number :
- edsair.doi.dedup.....dca0fb9b5ad5f1ef684d54df96c22c01