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Rheology of fibre reinforced fine-grained high performance concrete for thin-walled elements - effect of type and content of steel fibres

Author(s): S. Illguth, D. Lowke, C. Gehlen
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: 309-316
Total Pages: 8
Language: English

Concretes for thin-walled shell structures have to provide both high strength and flowability. Both can be achieved by reinforcing high strength fine-grained concretes with high contents of steel fibres. However, steel fibres can have a significant effect on the flowability and, as a result, the yield stress and viscosity of the fresh concrete.

The present investigations show the effect of increased fibre contents on the rheological parameters yield stress and viscosity of high strength fine-grained concrete. These parameters were determined by using a rheometer. The suitability of finegrained concretes for filling thin-walled formwork while maintaining flowability was determined by the time-dependent flow distance in an L-box model formwork. It was shown that there is a critical fibre content beyond which both the yield stress and the viscosity increase strongly. This affects the form filling ability of the concrete containing fibres.

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

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