NUMERICAL ANALYSIS OF THE DRYING KINETICS IN 3D CONCRETE SPECIMENS OF DIFFERENT SIZE

Author(s): Benoit Bary (1), Stéphane Poyet (1)
Paper category: Proceedings
Book title: SynerCrete’18 International Conference on Interdisciplinary Approaches for Cement-based Materials and Structural Concrete
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: 755-760
Total Pages: 6
Language : English

Abstract: We propose in this study to investigate numerically the variability of water permeability in unsaturated conditions through the simulation of drying on concrete specimens of different size. Numerical simulations on 3D reconstructed cylindrical concrete samples are performed and analyzed so as to investigate the effects of their thickness on the overall drying kinetics.Water transfer is modelled via a classical approach involving a single mass balance equation associated with the matrix phase corresponding to mortar. Besides the ‘structural’ variability related to the random process of aggregate placement, another source of variability is introduced through a distribution on the porosity. The results obtained in terms of drying kinetics and saturation degree profiles are analyzed and discussed, with a special regard to the effects of the thickness of the concrete specimens. Comparisons with simulations on the same specimens with homogeneous parameters for the drying model are made macroscopically.

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