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Comparison between the experimental measurement results and the micromechanical modelling on the ageing basic creep of vercors concrete

Author(s): Shun Huang, Julien Sanahuja, Luc Dormieux, Benoit Bary, Eric Lemarchand, Laurent Charpin, Romain Thion
Paper category: Proceedings
Book title: SynerCrete’18: Interdisciplinary Approaches for Cement-based Materials and Structural Concrete: Synergizing Expertise and Bridging Scales of Space and Time Vol. 1 & 2
Editor(s): Miguel Azenha, Dirk Schlicke, Farid Benboudjema, Agnieszka Jędrzejewska
ISBN: 978-2-35158-202-2
e-ISBN: 978-2-35158-203-9
Publisher: RILEM Publications SARL
Publication year: 2018
Pages: 73-78
Total Pages: 6
Language : English

Abstract: The concrete creep is critical for the prestressed containment building of nuclear power plants, since creep yields prestress relaxation. To develop a model of material behaviour incorporating the ageing creep, given the multi-scale and multi-physics nature of concrete, the creep experiments and the micro-mechanical modelling approach are attractive on the study of the VeRCoRs concrete, which is a typical formulation for the construction of the containment building.
The experimental campaign is carried out to characterize the ageing basic creep at different scales and at different ages of loading with the formulation of the VeRCoRs concrete. The purpose of the experiments is to describe the basic creep behaviour on cement paste, mortar and concrete. The ageing viscoelastic part (the basic creep) of the experimental results are concerned in the comparison. Moreover, for each specimen loaded, a complete unloading is performed to highlight the effect of creep recovery. The basic creep strain rate decreases with the increase of the age of loading (corresponds to an increase of the hydration degree). A direct confrontation between the experimental results and the modelling results is also performed. The ageing basic creep behaviour is compared with the application of mean-field homogenisation schemes.

Online publication : 2018
Publication type : full_text
Public price (Euros) : 0.00

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