EPJ Web of Conferences
Volume 56, 2013International Workshop NUCPERF 2012: Long-Term Performance of Cementitious Barriers and Reinforced Concrete in Nuclear Power Plant and Radioactive Waste Storage and Disposal (RILEM Event TC 226-CNM and EFC Event 351)
|Number of page(s)||8|
|Section||Session 2: Physical, Chemical and Mechanical Behavior: Coupled Chemical and Mechanical Effect|
|Published online||11 July 2013|
Modelling desiccation shrinkage of large structures
1 LMT/ENS Cachan/CNRS UMR8535/UPMC/PRES UniverSud Paris, Cachan, France
2 Université Paris Est, IFFSTAR, 58, boulevard Lefebvre, 75732 Paris, France
a e-mail: firstname.lastname@example.org
Drying of cement-based materials induces drying shrinkage, which may cause prestress loss or/and cracking if strains are (self or externally) restrained. Drying shrinkage is difficult to predict, since it depends on the material mix, mechanical and hygral boundary conditions, geometry ... This paper focuses on the study of size effect on final drying shrinkage, which is not well documented in the literature. In the Eurocode 2 (European code model), a reduction factor is applied for large structure, which is in agreement with experimental data of one campaign (found in the literature). Using numerical simulations, it is shown that a large panel of models, including phenomenological models as physical ones (which takes into account of (aging) creep under capillary pressure (assumed to be the physical mechanism for drying shrinkage)), do not predict size effect on final value of drying shrinkage.
© Owned by the authors, published by EDP Sciences, 2013
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