Abstract
Concrete and cement-based materials exhibit shrinkage when exposed to drying. Structural
effects and inhomogeneity of material properties adverse free shrinkage, hereby inducing
stress concentrations and possibly damage. In this contribution, the magnitude of shrinkage-
induced damage during a typical sample preparation procedure is assessed. To this extent, a
coupled hygro-thermo-mechanical model, incorporating rate-effects, is developed. The
constitutive model is applied at a mesoscopic level where the aggregates and the interfacial
transition zone (ITZ) are explicitly modelled. Two drying temperatures are considered: 35 °C
and 50 °C. Significantly more micro-damage and higher internal stresses are found for the
latter, revealing the importance of drying shrinkage damage, even at laboratory scale.
effects and inhomogeneity of material properties adverse free shrinkage, hereby inducing
stress concentrations and possibly damage. In this contribution, the magnitude of shrinkage-
induced damage during a typical sample preparation procedure is assessed. To this extent, a
coupled hygro-thermo-mechanical model, incorporating rate-effects, is developed. The
constitutive model is applied at a mesoscopic level where the aggregates and the interfacial
transition zone (ITZ) are explicitly modelled. Two drying temperatures are considered: 35 °C
and 50 °C. Significantly more micro-damage and higher internal stresses are found for the
latter, revealing the importance of drying shrinkage damage, even at laboratory scale.
Originalsprog | Engelsk |
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Titel | Concrete Modelling CONMOD'08 Proceedings of the International RILEM Symposium |
Redaktører | Erik Schlangen, Geert De Schutter |
Antal sider | 8 |
Forlag | Rilem publications |
Publikationsdato | 2008 |
Sider | 691-698 |
ISBN (Trykt) | 978-2-35158-060-8 |
Status | Udgivet - 2008 |
Begivenhed | Concrete Modelling CONMOD-08 - Delft, Holland Varighed: 26 maj 2008 → 28 maj 2008 Konferencens nummer: PRO 58 |
Konference
Konference | Concrete Modelling CONMOD-08 |
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Nummer | PRO 58 |
Land/Område | Holland |
By | Delft |
Periode | 26/05/2008 → 28/05/2008 |