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Article Dans Une Revue Construction and Building Materials Année : 2021

Homogenization of nonaging basic creep of cementitious materials: A multiscale modeling benchmark

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Résumé

This paper presents the results of a European benchmark on multiscale creep modeling for cementitious materials, performed in the framework of the COST Action TU1404 "Towards the next generation of standards for service life of cement-based materials and structures". Three micromechanical models from three research groups have been adopted for modeling the basic non-aging creep of cementitious materials. The benchmark is based on the hypothesis that creep results only from calcium-silicate-hydrates (C-S-H) and that viscoelastic behavior of all microstructural constituents are maturity-and composition-independent. By comparing model results among themselves as well as by comparing model predictions with experimental results obtained from three different laboratories, we demonstrate that creep upscaling from micrometer-sized C-S-H to centimeter-sized macroscopic samples of cement paste, mortar, and concrete, and from minutes-long creep tests at early ages to days-long creep tests at very mature ages is indeed possible. The benchmark also highlights the importance of considering micro-anisotropy of C-S-H in terms of nonspherical shapes for C-S-H hydrates.
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Dates et versions

hal-03319191 , version 1 (11-08-2021)

Identifiants

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Markus Königsberger, Túlio Honório, Julien Sanahuja, Brice Delsaute, Bernhard L.A. Pichler. Homogenization of nonaging basic creep of cementitious materials: A multiscale modeling benchmark. Construction and Building Materials, 2021, 290, pp.123144. ⟨10.1016/j.conbuildmat.2021.123144⟩. ⟨hal-03319191⟩
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