Mechanical properties of SFRC using blended manufactured and recycled tyre steel fibres

Abstract

This paper investigates the mechanical properties of 10 steel fibre reinforced concrete (SFRC) mixes at fibre dosages of 30, 35 and 45 kg/m3. Manufactured Steel Fibres (MSF) are used on their own, or blended with sorted steel fibres recycled from end-of-life tyres (RTSF). To characterise the flexural behaviour of the mixes, two flexural test methods, BS EN 14651:2005 3-point notched prism tests and ASTM C1550-05 centrally loaded round panel tests are employed. A strong correlation is found in the flexural behaviour of the SFRC prism and round panel specimens, with corresponding conversion equations proposed. The mechanical properties of hybrid mixes using RTSF vary depending on dosages, but are comparable with those of MSF-only mixes at the same fibre dosage. A positive synergetic effect is derived from hybrid mixes containing 10 kg/m3 of RTSF.

Metadata

Authors/Creators:

Hu, H.
Papastergiou, P.
Angelakopoulos, H.
Guadagnini, M. https://orcid.org/0000-0003-2551-2187
Pilakoutas, K. https://orcid.org/0000-0001-6672-7665

© 2018 Elsevier. This is an author produced version of a paper subsequently published in Construction and Building Materials. Uploaded in accordance with the publisher's self-archiving policy. Article available under the terms of the CC-BY-NC-ND licence (https://creativecommons.org/licenses/by-nc-nd/4.0/).

Keywords:

SFRC; Recycled tyre steel fibres (RTSF); Hybrid steel fibres; Flexural performance; 3-point notched prism tests; Centrally loaded round panel tests; Synergetic effect

Dates: