Coupling between leaching and creep of concrete
Couplage entre lixiviation et fluage du béton
Résumé
In a radioactive waste disposal, concrete containment structures must be studied over extended periods during which it is necessary to accountfor a possible degradation by calcium leaching due to on-site water. An experimental investigation is described where the effects of an acceleratedcalcium leaching process of concrete on creep of concrete are highlighted. The comparison with a creep test where the sample is immersed inwater shows that leaching generates tertiary creep and rupture of the specimen. A Dirichlet series coupled to a mechanical damage are used tomodel the coupled tertiary creep. With this method we can evaluate the lifetime of concrete structures subjected to chemical and mechanicalloading.