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Title: Integration approach of the Couette inverse problem of powder-type self-compacting concrete in a wide-gap concentric cylinder rheometer Part II. Influence of mineral additions and chemical admixtures on the shear thickening flow behaviour of powder type self-compacting concrete
Authors: Heirman, Gert ×
Hendrickx, Roel
Vandewalle, Lucie
Van Gemert, Dionys
Feys, Dimitri
De Schutter, Geert
Desmet, Bram
Vantomme, John #
Issue Date: Mar-2009
Publisher: Pergamon Press
Series Title: Cement and concrete research vol:39 issue:3 pages:171-181
Abstract: The influence of mineral additions and chemical admixtures on the shear thickening flow behaviour of powder type self-compacting concrete (SCC) is studied by means of a wide-gap concentric cylinder rheometer. The Couette inverse problem is treated by means of the integration method in order to derive the flow curve tau(gamma_dot) from the torque measurements.
According to the experimental results, the shear thickening effect is found to be strongly influenced by the addition of the chemical admixture (a polycarboxylate ether based superplasticizer), whereas mineral additions were found to modify the intensity of shear thickening. The limestone, quartzite and fly ash addition used in this research project, respectively increase, unalter and decrease the shear thickening intensity. The powder volume and the available amount of free water proved to have a major impact on the viscosity of the powder type SCC mixes. Increasing the powder volume or decreasing the amount of free water results in an increased viscosity of the SCC mix.
ISSN: 0008-8846
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Building Materials and Building Technology Section
Department of Civil Engineering - miscellaneous
× corresponding author
# (joint) last author

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