Experimental investigation on the properties of hybrid fibre reinforced high performance concrete

Abstract

The research work presents the influence of innovative type of fibre newlinereinforced concrete named the Hybrid fibre reinforced concrete on the newlinemechanical and durability properties of high-performance concrete (HPC). newlineThis study uses two different types of non-metallic fibres such as glass fibre newline(GF) and polypropylene (PP) fibre with two blended supplementary newlinecementitious materials (SCM) such as metakaolin (MK) and nano-silica (NS) newlinein the production of HPC at 0.3 and 0.45 w/b ratios. The HPC mixtures were newlineprepared to achieve a target strength of M60 grade with optimized percentages newlineof SCM and fibres. newlineThe GF was substituted from 0% to 1% and optimized at 1% and the newlinePP was substituted from 0% to 0.67% and optimized at 0.33%. The cement was newlinereplaced with MK from 0% to 30% at an interval of 5% and optimized at 10% newlineand the cement was replaced with NS from 0% to 3% with an interval of 0.5% newlineand optimized at 2.0%. The strength of HPC with mineral admixtures such as newlineMK and NS was improved by 11.75% and 9.35%, and the blended use of SCM newlineenhanced the strength by 24.10%. The concrete mixtures with optimized newlinepercentages of MK, NS, GF and PP fibre were prepared with different newlinecombinations to investigate fresh properties and mechanical properties such as newlinecompressive strength, tensile strength, flexural strength, elastic modulus and newlineimpact strength. newline