Combined effect of fibre geometry and aggregate size on the workability and mechanical properties of steel fibre reinforced concrete

Olubisi Ige*, Ayman Nassif, Ebohon Obas John, Ruoyu Jin, Job Momoh

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Reinforcing concrete with thin short discrete steel fibres is an efficient process in obtaining a multi-directional reinforcement to modify and improve the properties of concrete, especially its ductility. Therefore, it is imperative to understand the preference and selection of materials to make appropriate mixes for efficient result of steel fibre reinforced concrete. This study investigates the effects of length and aspect ratio of steel fibres when mixed with different sizes of coarse aggregate on the workability and subsequently, on the mechanical properties of the material. Variables selected for the study were fibre lengths of 50 mm and 60 mm, aspect ratio of 45, 50 and 60, fibre dosages of 25 kg/m³, 40 kg/m³, 50 kg/m³ and 60 kg/m³ and maximum aggregate sizes of 10 mm and 20 mm. Mix proportions for the investigation were kept constant throughout the study. Slump test was performed on fresh concrete while compressive strength was measured using 100 mm cubes and flexural performance assessed through 150 mm x 150 mm x 600 mm prism. The experimental results confirm that the combination of geometry and maximum aggregate size in the mix has an important influence on the workability of fresh steel fibre reinforced concrete. Consequently, the obtained results confirm that there is relationship between the mechanical properties of hardened concrete and the workability of fresh concrete. The concrete with poor workability reveals inadequate orientation and distribution of fibres, leading to poor actions of fibres within the mix and hence, affecting the mechanical properties of tested concrete materials.
Original languageEnglish
Title of host publicationProceedings of the CIB World Building Congress (WBC) 2022
PublisherIOP Publishing
Publication statusAccepted for publication - 22 Feb 2022
EventWBC2022: CIB World Building Congress - Melbourne, Australia
Duration: 27 Jun 202230 Jun 2022

Publication series

NameIOP Conference Series: Earth and Environmental Science
PublisherInstitute of Physics
ISSN (Print)1755-1315


ConferenceWBC2022: CIB World Building Congress
Internet address


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