Flexural behaviour of high performance self compacting fibrous concrete slabs

Abstract

In order to tap the potential of HPSCFC, existing knowledge has been extended to investigate the structural performance of fly ash and Ultra-Fine slag based HPSCFC slabs under monotonically increasing uniformly distributed loading. Slabs of size 1mx1m have been chosen to examine the structural performance. Fifteen slab specimens were cast and tested. For this testing of slab specimens, crimped and hooked type steel fibers of 0.5 mm diameter with length of 25 mm and 30 mm corresponding to 0, 0.75, 1.0 and 1.5 percent by volume of concrete were used. In terms of load deflection behaviour, stress strain characteristics, cracking characteristics and ductility related parameters such as ductility, ductility index, flexural toughness, flexural toughness index, resilience and stiffness, the typical results obtained on slab specimens were analyzed. An analytical calculation of Moment of resistance values of slabs by using formulae from other studies was carried out. Comparison of analytical results with experimental values shows a close agreement between the analytical and experimental findings. The typical findings of the experimental analysis are also compared with those obtained by other studies and it was found that experimental outcomes are slightly on higher side. It can be concluded that HPSCFC may be highly advantageous for seismic resistant structures and heavily reinforced members to provide secure and cost-effective alternatives on the basis of the experimental and analytical investigation conducted in the present study. Other strategically critical structures such as blast-resistant structures, impact-resistant structures, high-strength demand industrial structures, and nuclear containment structures may also be regarded as possible material applications. newline