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TitleNumerical benchmark campaign of COST Action TU1404 – microstructural modelling
Author(s)Wyrzykowski, Mateusz
Sanahuja, Julien
Charpin, Laurent
Königsberger, Markus
Hellmich, Christian
Pichler, Bernhard
Valentini, Luca
Honório, Túlio
Smilauer, Vit
Hajkova, Karolina
Ye, Guang
Gao, Peng
Dunant, Cyrille
Hilaire, Adrien
Bishnoi, Shashank
Azenha, Miguel
Numerical modelling
Issue date2017
JournalRILEM Technical Letters
Abstract(s)This paper presents the results of the numerical benchmark campaign on modelling of hydration and microstructure development of cementitious materials. This numerical benchmark was performed in the scope of COST Action TU1404 “Towards the next generation of standards for service life of cement‐based materials and structures”. Seven modelling groups took part in the campaign applying different models for prediction of mechanical properties (elastic moduli or compressive strength) in cement pastes and mortars. The simulations were based on published experimental data. The experimental data (both input and results used for validation) were open to the participants. The purpose of the benchmark campaign was to identify the needs of different modelsin terms of input experimental data, verify predictive potential of the models and finally to provide reference casesfor new modelsin the future. The results of the benchmark show that a relatively high scatter in the predictions can arise between different models, in particular at early ages(e.g. elastic Young’s modulus predicted at 1 d in the range 6‐20 GPa), while it reduces at later age, providing relatively good agreement with experimental data. Even though the input data was based on a single experimental dataset, the large differences between the results of the different models were found to be caused by distinct assumed properties for the individual phases at the microstructural level, mainly because of the scatter in the nanoindentation‐derived properties of the C‐S‐H phase.
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Appears in Collections:ISISE - Artigos em Revistas Internacionais

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