Impact resistance and mechanical properties of fiber‐reinforced concrete using string and fibrillated polypropylene fibers in a hybrid form

Abstract

In this study, the macro‐synthetic polypropylene fibers Forta and Barchip are used. The fibers are added at 0.5%, 1%, 1.5%, and 2% by weight of cement. Additionally, various fiber combinations with varying percentages are employed to create the concrete. Cubic specimens, bending beams, and impact specimens are all prepared on a percentage basis of fiber. The findings indicated that utilizing 1.5% fibrillated Forta fibers raised the compressive strength of the concrete by 18% and the flexural strength of the concrete by 58%. By increasing the usage of Barchip single‐strand fibers by 1.5%, the compressive strength increased by 36%, and the flexural strength increased by 89%. The highest ductility rate refers to the specimen containing 1.5% Forta fiber, with an energy capacity of 672 J. All the hybrid samples also possess a high ductility ratio. Forta fibrillated fibers are more effective in ductility, while Barchip monofilament fiber types can impressively increase the flexural strength of concrete. The hybrid usage of fibers improved compressive strength by 32% and flexural strength by 85%. Additionally, by combining fibers in hybrid form, energy absorption, ductility, impact resistance, and residual flexural strength are increased by 22, 2.3, 3.6, and 5.6 times, respectively, over the control sample.

Analysis and prediction of the compressive and splitting tensile performances for the novel multiple hooked‐end steel fiber reinforced concrete

“…Existing research [47][48][49][50][51] shows that the splitting tensile damage of SFRC was closely related to the concrete matrix strength, steel fiber content and type. Previous studies showed 52 that the steel fiber undertook the main tensile stress after the concrete matrix was destroyed.…”

Effects of incorporating granite powder in the mechanical properties of concrete

“…Similarly, in another study, GP was incorporated at 28.4% and 45% as a partial replacement for the sand for a design of 210 kg•cm -2 where the resistance was increased by 19% and 25% compared to the standard design, demonstrating an effect positive in both early strength and quality of concrete, as well as strength after 90 and 180 days of hardening (Ghorbani et al, 2019;Najaf & Abbasi, 2022b). Respect for the environment and the profitability of residual GP make it an acceptable and sustainable alternative construction material, indicating an enormous potential for GP as a replacement for natural fine aggregate (Singh, Khan, Khandelwal, Chugh & Nagar, 2016;Najaf & Abbasi, 2022a).…”

“…The use of recycled materials in the production of concrete is an issue that has generated interest among many researchers for the purpose of improving the environment (Najaf & Abbasi, 2022a).…”

Comparative cracking resistance‐cost study for the hot mix asphalt (HMA) mixtures made of natural and recycled asphaltic materials

“…Such products can be used in the construction of pavements and overlays or concrete structures. For example, natural, synthetic, and industrial fibers such as steel fibers, 1–5 jute and kenaf fiber, 6–8 rice fiber, 9 glass fiber, 10–12 basalt fiber, 13 wool of animals, 14,15 and Forta aramid fibers 16–20 have been employed in previous works in the mix design of concrete materials. Review of literature also reveals that other industrial waste materials such as recycled stone and metal aggregates, rubber powders and granules, shredded PET, furnace slag aggregates, and powders are possible candidate materials to be utilized in the mix design of asphalt or concrete materials 21–29 …”