Mechanical properties of steel fiber reinforced recycled aggregate concrete

Ramesh, Rakul Bharatwaj; Mirza, Olivia; Kang, Won‐Hee

doi:10.1002/suco.201800156

Cited by 66 publications

(40 citation statements)

References 31 publications

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“…The studies in the literature differ on how compressive strength is affected when steel fibers are added to RCA, as it may cause an increase or reduction [ 27 , 29 , 30 , 34 , 60 , 66 , 86 ]. Tensile and flexural strength are improved when fibers are added to RCA, regardless of the type of fiber [ 29 , 30 , 34 , 40 , 60 , 66 , 86 ]. However, other studies have concluded that steel fibers have an inconsiderable effect on mechanical properties in RCA [ 27 , 60 ].…”

Section: Discussionmentioning

confidence: 99%

Shear Strength of Fiber Reinforced Recycled Aggregate Concrete

Ghoneim

Yehia

et al. 2020

Materials

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In this paper, shear strength of fiber reinforced recycled concrete was investigated. A Self Consolidated Concrete (SCC) matrix with 100% coarse recycled aggregate and different types of fibers were used in the study. Steel (3D and 5D), synthetic and hybrid fibers with a volume fraction of 0.75% were added to the concrete matrix to prepare eight beams. In addition, two beams were cast without fibers as control specimens. All beams were prepared without shear reinforcement and were tested to evaluate concrete contribution to the shear capacity. In addition, optical images were captured to allow for full-field displacement measurements using Digital Image Correlation (DIC). The results showed about 23.44–64.48% improvement in the average concrete shear capacity for fiber-reinforced beams when compared to that of the control specimens. The percentage improvement was affected by fiber type and the steel fiber beams achieved the best performance. The addition of the fiber delayed the crack initiation and improved the post-cracking and ductile behavior of all beams. Moreover, the experimental results were compared to those predicted by codes and proposed equations found in the literature for concrete strength with and without fibers.

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Section: Discussionmentioning

confidence: 99%

Shear Strength of Fiber Reinforced Recycled Aggregate Concrete

Ghoneim

Yehia

et al. 2020

Materials

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“…From the last few decades, steel fiber is commonly used as main constituent material in FRCC 13–16 . Steel fibers are used to improve the tensile strength, flexural strength, energy absorption capability as well as cracking arresting properties, stiffness, deflection capability, and postcracking behavior 17–21 . The wide range of availability and practical affordability of steel fibers make it a popular choice for its use in concrete composite applications 22 .…”

Section: Introductionmentioning

confidence: 99%

Effectiveness of multiscale hybrid fiber reinforced cementitious composites under single degree of freedom hydraulic shaking table

Cao

Khan

2020

Structural Concrete

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Recently, the multiscale hybrid fiber reinforced cementitious composites (MSHyFRCC) with steel fibers, polyvinyl alcohol (PVA) fibers, and calcium carbonate whiskers had developed with improved mechanical properties under static load. Although, there is still a research gap to study its behavior and properties under the action of earthquake load. In this work, the properties of steel fibers, PVA fibers, and calcium carbonate whisker hybrid FRCC are evaluated by using single degree of freedom hydraulic shaking table. A total of 10 mixes having different mix proportions, fiber lengths, and contents of steel fibers, PVA fibers, and calcium carbonate whiskers are considered. The stress–strain curves, failure mode of cubes, compressive strength, peak micro‐strain, strain energy density, failure mode of column specimen, displacement‐time curves, strain‐time curves, and top acceleration‐time curves are studied. The multiscale hybrid fibers offer resistances against crack growth under dynamic load which results in longer time period with improved displacement, strain, and acceleration. The 1.5% steel fibers of 13 mm, 0.75% PVA fibers of 6 mm with 1% calcium carbonate whiskers and 1.25% steel fibers of 35 mm, 0.55% PVA fibers of 12 mm with 2% calcium carbonate whiskers are proposed to be the optimized mixes for short‐ and long‐length hybrid fibers, respectively.

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“…At present, the studies on the mechanical properties of steel fiber reinforced concrete with recycled coarse aggregate (SFRCAC) mainly focus on the basic mechanical properties, such as Ramesh [ 22 ] investigated the split-tensile strength, compressive strength, the toughness under compression and the elastic modulus for 25 SFRCAC mixes. In addition, Gao et al [ 23 , 24 , 25 , 26 ] studied the compressive strength, flexural strength, durability and mixture proportion design method by taking the replacement ratio of reclaimed aggregate and the volume content of steel fiber as the influencing parameters.…”

Section: Introductionmentioning

confidence: 99%

Effects of Groove and Steel Fiber on Shear Properties of Concrete with Recycled Coarse Aggregate

et al. 2020

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In this paper, a series of shear specimens with or without groove were manufactured to mainly analyze the effects of grooves (or shear section height) and steel fibers on the shear properties of concrete with recycled coarse aggregate through double-side direct shear test. In addition, the relationship between the shear strength and the compressive strength and splitting tensile strength of steel fiber reinforced concrete with recycled coarse aggregate (SFRCAC) was also discussed. The experimental results showed that the peak load, deformation corresponding to the peak load and calculated shear strength of the specimens with grooves were lower than those of the specimens without grooves. The steel fiber and recycled coarse aggregate (RCA) had a significant effect on the shear properties of SFRCAC. As the volume content of steel fibers increased, the shear strength of SFRCAC and the corresponding deformation increased gradually. With the replacement ratio of RCA increasing, the shear strength of SFRCAC decreased but the corresponding deformation increased gradually. Finally, the formula for calculating the shear strength of SFRCAC was proposed by analyzing and fitting the test results and the data of related literature.

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Mechanical properties of steel fiber reinforced recycled aggregate concrete

Cited by 66 publications

References 31 publications

Shear Strength of Fiber Reinforced Recycled Aggregate Concrete

Shear Strength of Fiber Reinforced Recycled Aggregate Concrete

Effectiveness of multiscale hybrid fiber reinforced cementitious composites under single degree of freedom hydraulic shaking table

Effects of Groove and Steel Fiber on Shear Properties of Concrete with Recycled Coarse Aggregate

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