Numerical benchmark campaign of COST Action TU1404 – microstructural modelling

RILEM Technical Letters

article

Mateusz Wyrzykowski¹  Julien Sanahuja²  Laurent Charpin²  Markus Königsberger³  Christian Hellmich³  Bernhard Pichler³  Luca Valentini⁴  Túlio Honório⁵  Vit Smilauer⁶  Karolina Hajkova⁶  Guang Ye⁷  PengGao⁷  Cyrille Dunant⁸  Adrien Hilaire⁹  Shashank Bishnoi10  Miguel Azenha^1,11 

[1] Swiss Federal Laboratories for Materials Science and Technology;EDF, R&D MMC;TU Wien;University of Padua;Université Paris‐Est, Laboratoire Navier (UMR 8205);TU Delft;Department of Engineering, University of Cambridge;Department of Engineering, University of Cambridge;EPFL;IIT;ISISE, University of Minho

关键词: Benchmark;    Numerical modelling;    Microstructure;    COST TU1404;   

DOI  :  10.21809/rilemtechlett.2017.44

学科分类：社会科学、人文和艺术（综合）

来源: RILEM Publications SARL

【 摘 要 】

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 models in terms of input experimental data, verify predictive potential of the models and finally to provide reference cases for new models in 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.

【 授权许可】

CC BY