Ultra-high-performance concrete (UHPC) is an advances and novel cementitious com- posite with superior structural strength and durability properties. A blend of lower water-binder ratio, pozzolanicmaterials,fillers, andchemicaladmixturesresultsinadensermix,leadingtoenhancedme- chanicalanddurabilityproperties. Thefibreaspectratiosignificantlyimpactsboththemechanicaland damagecharacteristics of Ultra-high performance fibre reinforced concrete (UHPFRC). This research focuses on…
Ultra-high-performance concrete (UHPC) is an advances and novel cementitious com- posite with superior structural strength and durability properties. A blend of lower water-binder ratio, pozzolanicmaterials,fillers, andchemicaladmixturesresultsinadensermix,leadingtoenhancedme- chanicalanddurabilityproperties. Thefibreaspectratiosignificantlyimpactsboththemechanicaland damagecharacteristics of Ultra-high performance fibre reinforced concrete (UHPFRC). This research focuses on investigating the impact of fibre aspect ratio on the mechanical and fracture behavior of UHPFRC.Flexuralstrengthtestswereconductedonprismspecimens(500mm×100mm×100mm) with two different fibre aspect ratios 37.5 and 65. Fracture properties of UHPFRC composites were evaluated using specimens (700mm×150mm×80mm). thenondestructiveacousticemission(AE) technique was utilized to capture fracture characteristics ahead of the crack tip in the presence of different aspect ratio fibre. The results infer that with an increase in aspect ratio from 37.5 to 65, both flexure and fracture strength are superior. Furthermore, the aspect ratio is significantly influencing the post-cracking phase more than that of pre-cracking.