Development of hybrid polypropylene-steel fibre-reinforced concrete

This research first investigates the optimization of fibre size, fibre cont ent, and fly ash content in hybrid polypropylene-steel fibre concrete with low fibre content based on general mechanical properties. The research resu lts show that a certain content of fine particles such as fly ash is necess ary to evenly disperse fibres. The different sizes of steel fibres contribu ted to different mechanical properties, at least to a different degree. Add itions of a small fibre type had a significant influence on the compressive strength, but the splitting tensile strength was only slightly affected. A large fibre type gave rise to opposite mechanical effects, which were furt her fortified by optimization of the aspect ratio. There is a synergy effec t in the hybrid fibres system. The fracture properties and the dynamic prop erties will be further investigated for the hybrid fibres concrete with goo d general mechanical properties. (C) 2000 Elsevier Science Ltd. All rights reserved.