Deterioration of concrete in railway tunnel suffering from sulfate attack

For the sake of understanding the deterioration behavior of concrete in actual railway tunnel structures subjected to aggressive sulfate medium in practice, detailed field investigations and tested analysis on sprayed concrete linings of approximately 40-year-old railway tunnels in environments cont...

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Bibliographic Details
Published inJournal of Central South University Vol. 18; no. 3; pp. 881 - 888
Main Authors Long, Guang-cheng, Xie, You-jun, Deng, De-hua, Li, Xiao-kun
Format Journal Article
LanguageEnglish
Published Changsha Central South University 01.06.2011
Subjects
Engineering
Metallic Materials
concrete
secondary sulfate minerals
railway tunnel
salt crystallization
sulfate attack
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Summary:For the sake of understanding the deterioration behavior of concrete in actual railway tunnel structures subjected to aggressive sulfate medium in practice, detailed field investigations and tested analysis on sprayed concrete linings of approximately 40-year-old railway tunnels in environments containing sulfate ion were carried out, respectively. The results show that the deterioration of concretes in the investigated area is serious, which involves complicated physicochemical process between the sulfate salt and concrete. Among them, the secondary sulfate minerals such as gypsum formation under very high concentration sulfate ion condition by accumulating and evaporation process dominate, followed by the crystallization of sulfate salt and formation of thaumasite.
ISSN:2095-2899
2227-5223
DOI:10.1007/s11771-011-0777-4