Impact and abrasion behavior of roller compacted concrete reinforced with different types of fibers

Abstract This research focuses on studying the impact and abrasion behavior of roller compacted concrete (RCC) reinforced with different types of fibers to enhance their mechanical properties. The problem statement revolves around investigating the effects of adding polyethylene terephthalate (PET) and macro polypropylene (MPP) fiber to concrete mixtures, analyzing how these fibers influence the compressive strength, abrasion resistance, and impact resistance of the RCC. Specifically, this study aims to determine the optimal fiber content that can improve impact and abrasion resistance without compromising compressive strength in RCC. The results show that adding different amounts of PET fiber leads to a decrease in the compressive strength compared to the reference mixture. The addition of 1–3 kg/m 3 of MPP increases the compressive strength by 16.5–29.8%, while 5 kg/m 3 of MPP decreases the compressive strength by 6.8% compared to the reference mixture. The inclusion of PET and MPP fibers in various ratios enhances the impact resistance of all mixtures compared to the reference mixture. However, the addition of PET fibers and 5 kg/m 3 of MPP decreases the abrasion resistance, while 1–3 kg/m 3 of MPP increases the abrasion resistance by 13.3–24%.