the influence of pet fibers on the properties of fresh and hardened concrete

there is a worldwide interest in using fibers of different types in concrete mixtures. in this regard, as the use of pet fibers has gradually increased during the last decade, this study aims to investigate the effects of pet fibers on the mechanical properties of hardened concrete and the workability of fresh concrete. to this end, different contents of pet fibers (pc= %0, %0.5, %1 and %1.5) are added to a concrete mixture and the workability of fresh concrete samples are measured by the slump tests. furthermore, the load-displacement behavior of the concrete samples is investigated in flexural and compression samples. results of this study reveal that pet fibers can noticeably change the energy absorption of concrete samples, especially in flexural specimens.