Flexural behavior of precast reinforced concrete composite members reinforced with structural nano-synthetic and steel fibers

Won, Jong-Pil

doi:10.1016/j.compstruct.2014.07.042

Cited by 18 publications

(6 citation statements)

References 10 publications

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“…However, the interfacial transition zone (ITZ) between fibers and the cementitious matrix is crucial. To contrast cracking phenomena, polymeric fibers of different nature are generally used (in particular, PET, PA, PE and PP), with some recent innovations like nanocomposite polymeric fibers which have better mechanical properties compared with conventional polymeric fibers [ 139 , 140 , 141 , 142 ]. Indeed, most of the polymeric fibers are smooth and have weak adhesion with the matrix.…”

Section: Fibrous and Particle Systems For Repairing Mortarsmentioning

confidence: 99%

New Materials and Technologies for Durability and Conservation of Building Heritage

et al. 2023

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The increase in concrete structures’ durability is a milestone to improve the sustainability of buildings and infrastructures. In order to ensure a prolonged service life, it is necessary to detect the deterioration of materials by means of monitoring systems aimed at evaluating not only the penetration of aggressive substances into concrete but also the corrosion of carbon-steel reinforcement. Therefore, proper data collection makes it possible to plan suitable restoration works which can be carried out with traditional or innovative techniques and materials. This work focuses on building heritage and it highlights the most recent findings for the conservation and restoration of reinforced concrete structures and masonry buildings.

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Section: Fibrous and Particle Systems For Repairing Mortarsmentioning

confidence: 99%

New Materials and Technologies for Durability and Conservation of Building Heritage

et al. 2023

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“…Many researchers [20,[25][26][27][28][29][30] observed significant improvement in shear capacity due to the addition of steel fibers by delaying the crack widening and propagation through bridging action. Synthetic fibers such as polyolefin-based macro-synthetic fibers can also improve the structural performance of concrete, addressing the adverse effects of steel fibers, such as reduced workability and durability issues due to corrosion [29,[31][32][33]. Past studies [16,[34][35][36][37][38][39] have shown that synthetic fiber reinforced concrete (SynFRC) effectively improves tensile behavior, especially in the post-peak.…”

Section: Discrete Fibers In Concretementioning

confidence: 99%

Experimental Study on Evaluation of Replacing Minimum Web Reinforcement with Discrete Fibers in RC Deep Beams

Sagi

Lakavath

Prakash

et al. 2021

Fibers

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This study investigates the possibility of replacing the minimum web reinforcement in deep beams with discrete fibers. Additionally, the equivalent dosage of fibers required to obtain similar performance of the deep beam with minimum web reinforcement is investigated. Deep beams made of plain concrete with no fibers, beams with minimum web reinforcement as per AASHTO LFRD recommendations (0.3% in both horizontal and vertical), and with a 0.5% volume fraction of steel, macro-synthetic and hybrid fibers are tested at a shear span to height ratio (a/h) of one. Test results show that the presence of 0.3% web reinforcement in horizontal and vertical directions increased the peak load by 25% compared to the plain concrete beams. However, it did not significantly change the first diagonal crack load. With the addition of 0.5% of steel, macro-synthetic and hybrid fibers, the peak load increased by 49%, 42%, and 63%, respectively, compared to the plain concrete specimen. The addition of steel fibers significantly improved the first cracking load. In contrast, macro-synthetic fibers did not affect the first cracking load but improved the ductility with higher deflections at peak. Hybridization of steel and macro synthetic fibers showed improved performance compared to the individual fibers of the same volume in peak load and ductility. Test results showed that a 0.5% volume fraction of discrete macro steel or synthetic or hybrid fibers can be used to completely replace the minimum web reinforcement (0.3% in both directions).

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“…Cementitious materials are good materials for civil construction with low cost and convenience for shaping. However, their low tensile strength and resulting cracking are critical drawbacks [ 1 , 2 , 3 , 4 ]. To overcome these problems, reinforcing fibers have been introduced as a solution, and some of them successfully raise the ductility and tensile strength of concrete/mortar and bridge cracks, thus delaying fracture [ 5 , 6 , 7 , 8 , 9 ].…”

Section: Introductionmentioning

confidence: 99%

Active Reinforcing Fiber of Cementitious Materials Using Crimped NiTi SMA Fiber for Crack-Bridging and Pullout Resistance

Choi

Jeon

2020

Materials

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This study investigated the recovery stress and bond resistance of cold drawn crimped SMA fiber using two different initial diameters of 1.0 and 0.7 mm. These characteristics are important to the active prestressing effect and crack-closing of the fiber. NiTi SMA fiber was used for the cold drawing, and then crimped shapes were manufactured with various wave heights. After that, tensile, recovery, and pullout tests were conducted. The cold drawn crimped fiber showed softening tensile behavior more clearly than the cold drawn straight fiber when not subjected to heating, whereas they had the same tensile behavior under heating. The recovery stress and the residual stress of the crimped fibers were less than those of the straight fiber with the same diameter. Moreover, crimped fibers with a large diameter and higher wave height would induce more recovery stress and residual stress. The maximum pullout resistance of the crimped fiber was a function of the wave depth, embedded length, yield strength, and flexural rigidity of the fiber.

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Flexural behavior of precast reinforced concrete composite members reinforced with structural nano-synthetic and steel fibers

Cited by 18 publications

References 10 publications

New Materials and Technologies for Durability and Conservation of Building Heritage

New Materials and Technologies for Durability and Conservation of Building Heritage

Experimental Study on Evaluation of Replacing Minimum Web Reinforcement with Discrete Fibers in RC Deep Beams

Active Reinforcing Fiber of Cementitious Materials Using Crimped NiTi SMA Fiber for Crack-Bridging and Pullout Resistance

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