Mesoscopic analysis of drying shrinkage damage in a cementitious material

Title: Mesoscopic analysis of drying shrinkage damage in a cementitious material
Author(s): P. Moonen, R.R. Pedersen, A. Simone, L.J. Sluys, J. Carmeliet
Paper category : conference
Book title: International RILEM Symposium on Concrete Modelling - ConMod '08
Editor(s): E. Schlangen and G. De Schutter
Print-ISBN: 978-2-35158-060-8
e-ISBN: 978-2-35158-076-9
Publisher: RILEM Publications SARL
Publication year: 2008
Pages: 691 - 698
Total Pages: 8
Nb references: 7
Language: English

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.

Online publication: 2009-06-15
Publication type : full_text
Public price (Euros): 0.00