Flexural Behavior of Flat-End Steel-Fiber-Reinforced Concrete

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

“…In order to eliminate the inherent shortcomings and improve the mechanical characteristics of plain concrete, mainly from the viewpoints of tension and post‐cracking strength, fiber‐reinforced concrete has been widely used in the past few decades. Many researchers have extensively investigated the flexural behavior of fiber‐reinforced concrete 4–13 . The studies indicate that by adding fibers to the concrete, its toughness and flexural strength are considerably improved 4,5 .…”

“…The concrete post‐cracking behavior, manifested in the ductility and residual strength, is largely influenced by the presence of fibers, although such influence on the initial cracks developed in the concrete may be insignificant 6,7 . In addition, many factors related to the fiber, including the fiber length, geometry, volume fraction, type, bond properties at the fiber–matrix interface, etc., may affect the flexural behavior of concrete 3–9 . The improved toughness and flexural strength in various types of fibers are principally governed by the load‐bearing capacity of fibers and the ability to bridge the cracks 10,11 .…”

“…The improved toughness and flexural strength in various types of fibers are principally governed by the load‐bearing capacity of fibers and the ability to bridge the cracks 10,11 . The multi‐scale nature of the concrete fracture has also been reported in the literature, including the structural and material scales 8–12 . In order to bridge and prevent the macro‐cracks from large‐scale propagations and thus improve the flexural properties of concrete, large size fibers, including the polyvinyl alcohol fibers, macro‐polypropylene fibers, long steel fibers, etc., could be utilized.…”

“…Many researchers have extensively investigated the flexural behavior of fiber-reinforced concrete. [4][5][6][7][8][9][10][11][12][13] The studies indicate that by adding fibers to the concrete, its toughness and flexural strength are considerably improved. 4,5 The concrete post-cracking behavior, manifested in the ductility and residual strength, is largely influenced by the presence of fibers, although such influence on the initial cracks developed in the concrete may be insignificant.…”

“…6,7 In addition, many factors related to the fiber, including the fiber length, geometry, volume fraction, type, bond properties at the fiber-matrix interface, etc., may affect the flexural behavior of concrete. [3][4][5][6][7][8][9] The improved toughness and flexural strength in various types of fibers are principally governed by the load-bearing capacity of fibers and the ability to bridge the cracks. 10,11 The multi-scale nature of the concrete fracture has also been reported in the literature, including the structural and material scales.…”