Numerical simulation of gravity induced aggregate migration in large in-situ SCC wall castings

Author(s): J. Spangenberg, J.H. Hattel, N. Roussel, M.R. Geiker
Paper category: Conference
Book title: Rheology and processing of Construction Materials – 7th RILEM International Conference on Self-Compacting Concrete and 1st RILEM International Conference on Rheology and Processing of Construction Materials
Editor(s): Nicolas Roussel and Hela Bessaies-Bey
Print ISBN: 978-2-35158-137-7
e-ISBN: 978-2-35158-138-4
Publisher: RILEM Publications SARL
Pages: 189-196
Total Pages: 8
Language: English

Abstract: 
Self-compacting concrete (SCC) is in theory an obvious material choice when casting large in-situ walls. However, the great flow distances involved in these castings demand a segregation resistant SCC in order not to obtain heterogeneities which in worst cases can lead to a reduction in the structure’s load carrying capacity. In this paper a numerical model is used to determine the aggregate distribution in a 20 meter long and 3 meter high wall casting. A finite volume based computational fluid dynamics model is developed and utilized to identify the specific flow patterns leading to heterogeneities and to analyze different casting scenarios in order to evaluate which casting strategies result in the most homogenous aggregate distributions.

Online publication: 2013
Publication Type: full_text
Public price (Euros): 0.00