| Autor: |
Rooyackers, Frits A.M., Bosco, Emanuela, Suiker, Akke S.J., Clemens, François H.L.R. |
| Přispěvatelé: |
Applied Mechanics and Design |
| Jazyk: |
angličtina |
| Rok vydání: |
2022 |
| Předmět: |
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| Zdroj: |
Cement and Concrete Research, 160:106809. Elsevier |
| ISSN: |
0008-8846 |
| Popis: |
A chemo-mechanical model is presented for the simulation of biogenic sulphide corrosion in concrete sewer pipes. The chemical model is formulated in terms of a system of coupled diffusion-reaction equations, which describe the processes of calcium hydroxide dissolution, calcium silicate hydrate dissolution and gypsum formation. The chemical problem is two-way coupled with a mechanical model that captures the damage processes caused by mechanical deformations, calcium silicate hydrate dissolution and gypsum formation. A set of numerical analyses illustrates that the model realistically simulates the growth of a gypsum corrosion layer and the consequent damage development in the concrete material. A validation experiment is performed that mimics the chemical process of biogenic sulphide corrosion, from which it is confirmed that the chemo-mechanical model adequately simulates both the shape of the experimental corrosion profile and the square root time development of the corrosion depth. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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