Influence of concrete flow on fibre distribution, orientation and mechanical properties of fibre reinforced concrete

Author(s): E.V. Sarmiento, G. Zirgulis, S. Sandbakk, M.R. Geiker, T. Kanstad
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: 418 - 430
Total Pages: 12
Language: English

Abstract: 
The paper describes results and experience from two experimental series where the influence of concrete flow on fibre distribution, fibre orientation and mechanical properties was studied. In both series, full scale elements and small scale standard beams (EN 14651) were used, and both synthetic and steel fibres were used. While the concrete in the first test series had 455 mm spread in the slump flow test, the corresponding value varied in the range 560-720 mm for the second series. In general there was no major influence of the flow length on the fibre orientation which seemed to stabilize close to the filling point of the casting. However, the residual tensile strength was in general larger for the full scale beams than for the small standard beams, an effect which partly is due to a larger fibre content and/or more favourable fibre orientation in the lower parts of the large beams. This effect was largest for the beams in the second series where the flow led to increased segregation of the steel fibres.

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