Estimating the stress development in early age concrete with mineral additions from coupled measurements

Author(s): Jérôme Carette, Brice Delsaute, Stéphanie Staquet
Paper category: Proceedings
Book title: SynerCrete’18: Interdisciplinary Approaches for Cement-based Materials and Structural Concrete: Synergizing Expertise and Bridging Scales of Space and Time Vol. 1 & 2
Editor(s): Miguel Azenha, Dirk Schlicke, Farid Benboudjema, Agnieszka Jędrzejewska
ISBN: 978-2-35158-202-2
e-ISBN: 978-2-35158-203-9
Publisher: RILEM Publications SARL
Publication year: 2018
Pages: 171-176
Total Pages: 6
Language : English

Abstract: In order to evaluate the efficiency of a given supplementary cementitious material, its mechanical behaviour has to be thoroughly investigated. In particular, early-age micro- cracking might occur at a time when all concrete properties evolve, while the rate of evolution of autogenous and thermal deformations is still very high. If these deformations are restrained, stresses are induced as the concrete hardens. These stresses are both homogenously distributed and localized, depending on the scale considered, and may lead to localized cracking if the stress overpasses the strength of the material. The aim of this study is twofold. First, prediction models are presented. These models are specifically designed for the very early age description of in terms of strength, elastic properties, autogenous deformation as well as creep development of concrete with high content of mineral additions. Secondly, newly developed modelling strategies are confronted to experimental measurement of the stress development in restrained deformation conditions with a TSTM device. This study highlights the limits of the viscoelastic modelling approach using the superposition principle for modelling the early age behaviour of concrete with mineral additions.

Online publication : 2018
Publication type : full_text
Public price (Euros) : 0.00