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Jia, N., Tassin, B., Calon, N., Deneele, D., Koscielny, M. & Prevot, F. (2016) Scaling in railway infrastructural drainage devices: site study. Innovative Infrastructure Solutions, 1 UNSP 42.
Added by: Richard Baschera (2017-10-24 13:30:34) Last edited by: Richard Baschera (2017-10-24 13:38:15) |
| Type de référence: Article DOI: 10.1007/s41062-016-0042-7 Numéro d'identification (ISBN etc.): 2364-4176 Clé BibTeX: Jia2016 Voir tous les détails bibliographiques  |
Catégories: ID2M Créateurs: Calon, Deneele, Jia, Koscielny, Prevot, Tassin Collection: Innovative Infrastructure Solutions |
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In France, about 450 km of high-speed lines (HSL) are potentially subject to drain scaling problem. A HSL site affected by calcite scaling was continuously monitored for 20 months to follow the phenomenon and also to estimate the monthly calcite precipitation rate. Drain water samples were also monthly analyzed and show high calcium and sulphate concentrations. The high sulphate concentration (similar to 6 mM) highlights the dissolution of gypsum in the drain environment. Based on the material analysis (X-ray diffraction), gypsum is present in the subballast and capping layer. Since the drain system is a multi-environments system, and based on multi-phase reactions, the study is divided into two parts: a physical one (transport of water in the system) and a chemical one (transport of the reactants in the system). The physical processes have an essential impact on the chemical precipitation processes. In the present paper, on the basis of the collected data, the physical behaviour of the experimental site (water circulation) will be presented in the first step and used in the further chemical process study. The monthly calcite precipitation rate and quantities are given as well.
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