19. Characteristics and influence of paste on the behaviour of self-compacting concrete in the fresh state

Title: 19. Characteristics and influence of paste on the behaviour of self-compacting concrete in the fresh state
Author(s): S. Grünewald, J.C. Walraven
Paper category : conference
Book title: 5th International RILEM Symposium on Self-Compacting Concrete
Editor(s): G. De Schutter and V. Boel
Print-ISBN: 978-2-35158-047-9
e-ISBN: 978-2-35158-088-2
Publisher: RILEM Publications SARL
Publication year: 2007
Pages: 137 - 142
Total Pages: 6
Nb references: 7
Language: English

Abstract: Self-compacting concrete (SCC) consists of two interacting phases: the paste and the aggregate phase. The prediction of the concrete behaviour based on the paste properties facilitates the design of SCC and reduces the volume of material required for testing. The addition of new, special additives and admixtures like colour pigments, shrinkage reducer, viscosity agent and air entrainer complicates the optimisation of the mixture composition.
With simple test methods for paste, trial and error testing on the concrete level might be eliminated.
An experimental study was carried out in order to investigate the effect of the paste properties on the fluid-solid system of SCC. Sixty mixtures in a wide range of mixture compositions and characteristics in the fresh state were tested. Stabilizer- and powder-type SCC’s were a part of this study; the effect of the type and the dosage of viscosity agents was investigated. The properties of the paste with the same composition as in SCC were measured with a centrifuge, the mini-slump test and a funnel. This article presents results of the study and discusses the applicability of paste tests for the mix design of SCC.

Online publication: 2009-06-16
Publication type : full_text
Public price (Euros): 0.00