Rheology of self compacting concrete and its connection to empirical test measurements

Author(s): M. Neophytou, A. Kanellopoulos, S. Pourgouri, M.F. Petrou, I. Ioannou
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: 301- 309
Total Pages: 9
Language: English

Abstract: 
The characterization of a concrete mix as self-compacting (SCC) is performed by a series of empirical tests such as the slump test, the L-Box and the V-funnel test. They have been designed to assess the performance of the mix, its segregation resistance and filling ability, but they are unable to estimate the rheological behavior of the SCC mix. The scope of the present work is to study the rheology of SCC and its role in the flow of the mix through experimental and analytical processes. Specifically, the investigation models the SCC flow with a fluid mechanical insight, by taking into account the competing influences of viscosity, yield stress and inertia. The parameterization of the roles of viscosity, yield stress and inertia has been derived analytically for a generic fluid, and thereby specific numerical parameters have been determined experimentally for fluid flows of different rheology classification. In particular, a series of experiments for Bingham fluids has confirmed the generic results. Furthermore, the proposed model describing the SCC flow is verified by a series of experiments with a cement mortar mixture.

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