Effect of macro polypropylene fiber and basalt fiber on impact resistance of basalt fiber‐reinforced polymer‐reinforced concrete

Abstract

In this paper, the effect of macro nonmetallic fibers (i.e., polypropylene fibers and basalt fibers) on the impact response of basalt fiber‐reinforced polymer‐reinforced concrete (FRP‐RC) discs is experimentally investigated using a self‐developed drop‐weight impact test device. The plain concrete and conventional steel‐reinforced concrete samples are explored as references. The impact resistance and failure behaviors are analyzed. Statistical analyses for first‐crack strength and failure strength are performed. The composite effect of basalt FRP bars and macro nonmetallic fibers on the impact energy at failure is also compared. The results indicate that the behaviors under impact load, that is, failure strength, crack number, the indent diameter, and penetration depth of the shriveled area, are greatly improved by adding of macro nonmetallic fibers, in particular macro polypropylene fibers. Additionally, the incorporation of these fibers into the basalt FRP‐RC transforms the brittle failure mode into a well ductile failure mode. Two‐parameter Weibull models are fitted by graphical methods and used to characterize the first crack strength and failure strength distributions. Reliability functions for first crack strength and for failure strength are estimated and failure strength can be predicted from first‐crack strength by using a linear regress model. The hybrid use of basalt FRP bars and macro nonmetallic fibers demonstrates a positive synergetic effect on the impact energy at failure.

Basalt‐polypropylene fiber reinforced concrete for durable and sustainable pipe production. Part 1: Experimental program

“…The main advantages of using synthetic macrofibers as concrete reinforcement are: (1) minor impact on the workability of the fresh concrete; (2) these are inert to chlorides and aggressive chemicals that can affect to steel reinforcement and/or concrete [14][15][16] ; and (3) in case of fibers remain at surface of the pipes, these hardly can cause injuries to labors due to its flexibility. Some authors [17][18][19][20][21] have even concluded that polypropylene macrofibers (PPFs) can be more efficient (for a certain range of fiber volumes and mechanical requirements) than SFs for increasing toughness and post-cracking residual strength of concrete.…”

Effect of multi‐scale polypropylene fiber hybridization on compressive constitutive mechanics parameters of roller compacted concrete

“…The coarse PPF has all most the same enhancement on strength and toughness compared with steel fiber. Besides, coarse PPF is of excellent anti‐electromagnetic interference, therefore, the study on mechanical properties of concrete reinforced with coarse and fine PPF has higher social and economic benefits 15,24–26 …”

Study on mechanical properties of macro‐synthetic fiber‐reinforced iron ore tailings concrete

“…Additionally, macro‐synthetic fibers have better features in density and corrosion resistance compared with steel fibers 16 . Moreover, macro‐synthetic fibers can bridge crack, control crack width, consume energy, and provide residual flexural tensile strength for concrete 17 . Characteristically, the performances of fiber‐reinforced concrete depends on a number of factors: matrix characteristics, fiber characteristics (elastic modulus, tensile strength, surface feature, and fiber size), and mix characteristics (fiber content, distribution, and orientation).…”

“…16 Moreover, macro-synthetic fibers can bridge crack, control crack width, consume energy, and provide residual flexural tensile strength for concrete. 17 Characteristically, the performances of fiber-reinforced concrete depends on a number of factors: matrix characteristics, fiber characteristics (elastic modulus, tensile strength, surface feature, and fiber size), and mix characteristics (fiber content, distribution, and orientation). To date, some investigations [18][19][20] have been performed on the fiber content, distribution, orientation, and matrix strength of macrosynthetic fiber-reinforced concrete.…”