From AAR to DEF: Numerical Modelling of Structures affected by expansive Reaction in Concrete
| Autor: | SEIGNOL, Jean François, OMIKRINE METALSSI, Othman, Baghdadi, Nizar, Toutlemonde, François |
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| Přispěvatelé: | Département Structures et Ouvrages d'Art (IFSTTAR/SOA), Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-PRES Université Paris-Est |
| Jazyk: | francouzština |
| Rok vydání: | 2012 |
| Předmět: | |
| Zdroj: | ICAAR 2012, 14th International Conference on Alkali-Aggregate Reaction ICAAR 2012, 14th International Conference on Alkali-Aggregate Reaction, May 2012, Austin, États-Unis. 10 p |
| Popis: | ICAAR 2012, 14th International Conference on Alkali-Aggregate Reaction, Austin, ETATS-UNIS, 20-/05/2012 - 25/05/2012; The recent detection in France of several scores of worrying Delayed-Ettringite For- mation (DEF) affected cases in major concrete structures urged the need for developing numerical models adapted to the specificities of DEF. Recently discovered and identified as a possibly single and major origin of disorders, DEF is not so largely studied as Alkali-Aggregate Reaction (AAR). However, it presents strong similarities with AAR: concrete is subjected to expansive chemical reactions which induce cracks, abnormal deformations, stiffness decrease. As a unique feature, early-age thermal history plays a crucial role in forthcoming DEF de- velopment. This contribution explains how a numerical tool for DEF-affected concrete was built based on a macro-scale model developed for AAR. The focus is put on the AAR-features used as a starting point, and on the specific model developed to take into account early-age history. |
| Databáze: | OpenAIRE |
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