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Self-compacting concrete simulation using distinct element method



Author(s): V. Mechtcherine, S. Shyshko
Paper category: Symposium
Book title: 3rd International RILEM Symposium on Rheology of Cement Suspensions such as Fresh Concrete
Editor(s): O.H. Wallevik, S. Kubens, S. Oesterheld
ISBN: 978-2-35158-091-2
e-ISBN: 978-2-35158-092-9
Pages: 171 - 179
Total Pages: 9
Language: English


Abstract: 
The rheological behaviour of fresh concrete is decisive for its transport, placement, and compacting. In order to make possible an analysis of the complex behaviour of fresh concrete subject to different combinations of rheological properties and boundary conditions, a numerical simulation tool has been developed based on the Distinct Element Method (DEM). In this approach the individual components of the concrete mesostructure, i.e. aggregates, fine mortar, air voids, and fibre, are modelled. The study itself focused on simulating the behaviour of Self-Compacting Concrete. The study used only two basis elements: spherical (3D) particles to discretise the concrete components and walls to define boundaries. A systematic identification of the model parameters for the simulation of fresh concrete was continued on the basis of the results of previous investigations. In the first step the model was calibrated for different particle sizes using as a reference the results of slump flow tests. Subsequently the J-Ring and L-Box tests were simulated using the same set of model parameters. It was found that the simulations could predict the concrete behaviour in these experiments reliably, correctly displaying the decisive phenomena as observed in the tests.


Online publication: 2009
Publication Type: full_text
Public price (Euros): 0.00