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| Naji, M. |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Ali, M. A. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Faria, Rui
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Topics
Publications (11/11 displayed)
- 2021Modelling macroscopic shrinkage of hardened cement paste considering C-S-H densificationcitations
- 2020A new test setup for simulation of the combined effect of bending and axial restraint in slab-like specimenscitations
- 20203D numerical simulation of the cracking behaviour of a RC one-way slab under the combined effect of thermal, shrinkage and external loadscitations
- 20193D Thermo-hygro-mechanical approach for simulation of the cracking behaviour of a RC slab under the combined effects of applied loads and restrained shrinkage
- 2019Numerical study of arch dams under the construction and operation scenarios
- 2018Microstructure-based prediction of thermal properties of cement paste at early ages
- 2018Microstructure-based 3d modelling of diffusivity in sound and cracked cement paste
- 2018Proposal of a test set up for simultaneous application of axial restraint and vertical loads to slab-like specimens: sizing principles and application
- 2012A Timoshenko-based structural model for the analysis of bridges
- 2011Numerical simulations of the warth bridge seismic response
- 2010Simplified Procedure for Shear Failure Assessment of RC Framed Structures Exposed to Fire
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article
Modelling macroscopic shrinkage of hardened cement paste considering C-S-H densification
Abstract
Shrinkage of hardened cement paste is a direct result of its desorption isotherm. The relationship between the desorption isotherm and the relative humidity in a hydrating cement paste is mainly controlled by the pore size distribution (nanopores to micropores). There are several hydration models to describe the microstructure of cement paste, but the desorption isotherm and self-desiccation are not direct outputs from those models as they are usually given as constitutive inputs. In this study an attempt was made to fill this gap by predicting the sorption isotherm, the drying shrinkage and the self-desiccation of cement paste directly from the evolution of its microstructure. A simple hydration model was developed to predict the microstructure of Portland cement pastes, as well as the nanostructure of calcium silicate hydrate (C-S-H), considering its densification during cement hydration. Predictions from the model were compared with some recent experimental findings from studies in the literature where the influence of the water-to-cement ratio was evaluated. The main contribution of this work is the integration of nanoscale and microscale material models towards determining the macroscopic properties of cement paste.