Over the years, numerous studies have been carried out on the sustainable use of waste tyre steel fibre and palm kernel shell in concrete production. However, the study on the integration of waste tyre steel fibre (WTSF) and milled palm kernel shell (MPKS) in concrete production, especially fibre reinforced concrete (FRC) is yet to be evaluated hence, this research studied the effects of waste tyre steel fibre and milled palm kernel shell as fine aggregate partial replacement in FRC. Five different sets of concrete samples were cast which are, ordinary concrete (A0), concrete with 10% MPKS replacement with fine aggregate (A1), and others with 10% MPKS and 0.5% WTSF at a varying length of 25 mm, 35 mm and 45 mm (A2, A3 and A4) respectively, the diameter of the WTSF ranges from 1.34 mm-1.69 mm. concrete mix of 1:1.5:3 and 0.6 water cement ratio were adopted. From the study, slump value decreased with an increase in the length of the WTSF. Furthermore, the compressive and splitting tensile strengths increased with increase in the length of fibres. The least and highest 28-day compressive strength values of 21.3 and 30 N/mm2 and tensile strength values of 1.9 and 3.2 N/mm2 were recorded for A0 and A4 respectively. Lastly, A4 showed the highest strength for both compressive and tensile strengths. This research shows an integration of MPKS and WTSF to improve mechanical properties of concrete structures thereby contributing to sustainable construction practices and waste management techniques.

fibre reinforced concrete, milled palm kernel shell (MPKS), waste tyre steel fibre, compressive strength, tensile strength, physicochemical