Micro- and Macro-Scale Thermomechanical Modelling of Bulk Deformation in Early-Age Cement-Based Materials

Jiří Vala; Stanislav Šťastník; Vladislav Kozák

doi:10.4028/www.scientific.net/KEM.465.111

Paper Titles

Microstructure, Fracture and Damage Mechanisms in Rare-Earth Doped Silicon Nitride Ceramics
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Peierls Stresses Estimated from CRSS Vs. Temperature Curve and their Relation to the Crystal Structure
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Stress Relaxation in an AZ31 Magnesium Alloy
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Elastic-Plastic Stress Singularities of Plane V-Notches in Power-Hardening Materials
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Micro- and Macro-Scale Thermomechanical Modelling of Bulk Deformation in Early-Age Cement-Based Materials
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3D Discrete Dislocation Modelling of High Temperature Plasticity
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Numerical Study of the Influence of the Crack Front Curvature in the Evolution of the Plastic Zone along the CT Specimen Thickness
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Complex Variable Green’s Functions for Crack-Microcracks Interactions
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HomeKey Engineering MaterialsKey Engineering Materials Vol. 465Micro- and Macro-Scale Thermomechanical Modelling...

Micro- and Macro-Scale Thermomechanical Modelling of Bulk Deformation in Early-Age Cement-Based Materials

Abstract:

Final user properties of concrete and other silicate composite structures are conditioned by their early-age history. Bulk deformation in early-age cement-based material system, not subjected to external forces, but generating significant stresses and temperature and humidity redistributions, is associated with the internal volume reduction of cement/water mixture during the hydration process. The proposed experimentally supported computational model starts at the micro-scale balance of mass, momentum and energy to and comes to the macroscopic mixture analysis with (at most) 20 primary variable fields, taking into account full coupling between mechanic strains and stresses, thermal and moisture transfer and chemical phenomena, including phase changes. The evolution of all variables is driven by kinetics of cement hydration, characterized by hydration degree as a function of chemical affinity.

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Periodical:

Key Engineering Materials (Volume 465)

Pages:

111-114

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.465.111

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Online since:

January 2011

Authors:

Jiří Vala, Stanislav Šťastník, Vladislav Kozák

Keywords:

Cement-Based Composite, Early-Age Massive Concrete Structures, Hygro-Thermo-Chemo-Mechanical Modelling, Scale Bridging

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