Print Email Facebook Twitter Microstructural modeling of early-age creep in hydrating cement paste Title Microstructural modeling of early-age creep in hydrating cement paste Author Do, H.Q. (TU Delft Transport Engineering and Logistics) Bishnoi, Shashank (Indian Institute of Technology Delhi) Scrivener, Karen L. (Swiss Federal Institute of Technology) Date 2016 Abstract This paper presents a new approach to model the creep behavior of cement paste at early ages. The creep behavior is simulated by applying a time-varying generalized Maxwell model on the individual elements of a finite-element mesh of a simulated three-dimensional microstructure and compared with results in the literature. All mechanical properties of the constituent phases are taken from literature and Maxwell chain parameters are obtained by fitting the intrinsic creep of calcium silicate hydrate (C-S-H). A reasonable agreement between the simulations and the experimental results are obtained by assuming a constant C-S-H density of 2.0 g/cm3This paper presents a new approach to model the creep behavior of cement paste at early ages. The creep behavior is simulated by applying a time-varying generalized Maxwell model on the individual elements of a finite-element mesh of a simulated three-dimensional microstructure and compared with results in the literature. All mechanical properties of the constituent phases are taken from literature and Maxwell chain parameters are obtained by fitting the intrinsic creep of calcium silicate hydrate (C-S-H). A reasonable agreement between the simulations and the experimental results are obtained by assuming a constant C-S-H density of 2.0 g/cm3 . It was found that better agreements could be obtained at low degree of hydrations, by assuming a loosely packed C-S-H growing in the microstructure. It was also found that the short-term creep characteristics of C-S-H from nanoindentation can be used to reproduce macroscopic creep at least over a few days. The results show how numerical models can be used to upscale phase characteristics to macroscopic properties of composites. Subject Ageing creepFinite-element methodModelingCement microstructureCalcium silicate hydrate (C-S-H)Calcium silicate hydrate (C-S-H) densificationEarly-age propertiesMicrostructural modeling To reference this document use: http://resolver.tudelft.nl/uuid:ab0e8910-3e95-4a35-8619-009925c467c4 DOI https://doi.org/10.1061/(ASCE)EM.1943-7889.0001144 ISSN 0733-9399 Source Journal of Engineering Mechanics, 142 (11) Bibliographical note Accepted Author Manuscript Part of collection Institutional Repository Document type journal article Rights © 2016 H.Q. Do, Shashank Bishnoi, Karen L. Scrivener Files PDF HuyDo_article.pdf 2.21 MB Close viewer /islandora/object/uuid:ab0e8910-3e95-4a35-8619-009925c467c4/datastream/OBJ/view