On flow properties,fibre distribution,fibre orientation and flexural behaviour of FRC |
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Authors: | Patrick Stähli Rocco Custer Jan G. M. van Mier |
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Affiliation: | (1) Department of Civil Engineering, ETH Zurich, Institute for Building Materials, 8093 Zurich, Switzerland |
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Abstract: | For improving the mechanical properties of fibre reinforced concrete one can either increase the fibre content, use hybrid fibre systems, or one can attempt to align fibres in the direction of stress. In this paper, it is attempted to use the flow-properties of the fresh (self-compacting) concrete to change the fibre distribution and orientation. Using a single mixture of fibre reinforced concrete, containing 3% of 30 mm long straight steel fibres, the fibre distribution and orientation was determined in three different parts of a ‘U-shaped specimen’ where the concrete could flow in three different directions. The fibre distribution and orientation was determined from a CT-scan. Flexural tests show that the mechanical behaviour depends on the fibre distribution and orientation, which can be affected by changing the viscosity of the fresh mixture. |
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Keywords: | Fibre alignment Fibre orientation Fibre distribution Flow profile Flexural strength |
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