The aim of the investigation was to make an initial assessment of the effect of fibres on the air void content (coarse and fine voids) in both fresh and hardened concrete, and from this to obtain parameters relevant to concrete technology. As the evidence for a higher level of entrained air as a result of the addition of fibres grows, the question arises of whether this additional air has a positive or negative effect on durability.
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Leopold-Franzens-Universität Innsbruck Baufakultät Institut für Betonbau, Baustoffe und Bauphysik Technikerstraße 13 6020 Innsbruck, AUSTRIA T +43 512 5076608 F +43 512 5072902 www.uibk.ac.at Dietmar.Thomaseth@uibk.ac.at