Investigating the Effects of Steel Fibre and Basalt Fibres on the Mechanical Properties of Hybrid Fibre-Reinforced High-Performance Concrete

This paper presents the development of hybrid fibre reinforced high-performance concrete (HFRHPC) using basalt fibre and steel fibre. The basalt fibre and steel fibre were used to improve the mechanical properties of the concrete. Both fibres were used to improve the tensile strength of the concrete. In this study, the mix proportions of M60 grade HPC has been arrived based on the method proposed by Prof. Aitcin which was derived from the guidelines given by ACI 211.1 The Hybrid fibre-reinforced High-performance concrete was obtained by adding different volume fractions of basalt and steel fibres. The percentages of steel fibres considered include 0.5, 1, 1.5 and 2%. Whereas the percentages of basalt fibres considered include 0.1, 0.3 and 0.5%. An attempt was made to obtain the relation between the various engineering properties with the percentage of fibres added. In general, the addition of fibres improved the mechanical properties of both HPC and HFRHPC. However the increase was found to be minimal in the case of while adding basalt fibre. The outcome of this investigation will be useful in structures subjected to stress reversals.