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Rheological characterization of the effect of steel fibres in self-compacting concrete



Author(s): S. Grünewald, J.C. Walraven
Paper category: Conference
Book title: 8th RILEM International Symposium on Fiber Reinforced Concrete: challenges and opportunities (BEFIB 2012)
Editor(s): Joaquim A.O. Barros
Print ISBN: 978-2-35158-132-2
e-ISBN: 978-2-35158-133-9
Publisher: RILEM Publications SARL
Pages: 75 - 85
Total Pages: 10
Language: English


Abstract: 
The addition of fibres can improve the performance of cementitious materials in the hardened state. On the other hand, they can cause difficulties during production and processing. Fibres are able to form an internal structure in concrete and due to their shape they increase the mechanical interaction during the flow. With an optimized mixture composition and controlled rheology and quality, fibres can become more effective. Recent developments in material technology show that fibre dosages can be significantly increased with adjusted mixture compositions and production techniques i.e. concrete with self compacting ability.
This paper describes results of a rheological study on the effect of the type of steel fibre, the fibre dosage and the mixture composition. Rheological testing with the BML-viscometer was executed on self compacting concrete with and without steel fibres. The results are discussed in context of how different fibre types affect rheological characteristics and how to minimise mechanical interaction and interlocking of fibres during the flow and the production stage. Influence patterns are described that can be used to characterise self-compacting fibre-reinforced concrete.


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