Early-age modelling of concrete properties

Author(s): Claus Vestergaard Nielsen
Paper category: Proceedings of the International RILEM Conference Materials, Systems and Structures in Civil Engineering 2016 Segment on Fresh Concrete
Editor(s): Lars N. Thrane, Claus Pade, Oldrich Svec and Nicolas Roussel
ISBN: 978-2-35158-184-1
e-ISBN: 978-2-35158-185-8
Publisher: RILEM Publications SARL
Publication year: 2016
Pages: 84-95
Total Pages: 12
Language : English

Abstract: The first few days of the concrete lifetime—right after casting—may have a large impact on the following decades of service life. Designers and contractors often use simulation tools to model the hardening phase of concrete where it develops from a fluid material to a fully hardened mass with or without reinforcement. Especially for civil structures the curing of concrete is a critical issue with high importance in order to secure proper durability and performance properties for up to or more than 100 years of service life. Therefore, it is crucial to have goof models to predict the early-age properties of concrete in order to obtain simulations and calculations with sufficient accuracy.
Eurocode 2 contains model for the most important properties of concrete. The concrete strength class is often used as the general reference when a model is de-fined. But in line with the increased use of SCM’s and admixtures the models are sometimes not aligned with the modern concrete mix designs to be found in the building sites. This paper discusses some of the important models – e.g. strength shrinkage, stiffness, etc. Comparisons are given between laboratory tests and Eurocode 2 models and furthermore, new revised models found in the fib Model Code 2010 are presented.

Online publication : 2016
Publication type : full_text
Public price (Euros) : 0.00