Physicomechanical Behavior of High-Performance Concrete Reinforced with Recycled Steel Fibers from Twisted Cables in the Brittle State—Experimentation and Statistics

This research studied the effect of recycled steel fibers extracted from twisted cable waste on the fresh and hardened states of high-performance concretes. Accordingly, slump, water absorption (WA), compressive strength (CS), flexural strength (FS), and split tensile strength (STS) were measured in...

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Published in:Buildings (Basel) 2023-09, Vol.13 (9), p.2290
Main Authors: Chetbani, Yazid, Zaitri, Rebih, Tayeh, Bassam A., Hakeem, Ibrahim Y., Dif, Fodil, Kellouche, Yasmina
Format: Article
Language:English
Subjects:
Analysis
Bridges
Cables
Cement
Comparative analysis
Compressive strength
Concrete
Crack propagation
Diameters
Ductility
Fiber reinforced concretes
Fibers
Flexural strength
high-performance fiber-reinforced concrete
Impact strength
Influence
Investigations
Mechanical properties
Optimization
physicomechanical behavior
recycled steel fibers
Reinforced concrete
Reinforcing steels
Response surface methodology
Scanning electron microscopy
Statistical analysis
Statistics
Steel
Steel fibers
Tensile strength
twisted cables
Variance analysis
Water absorption
Wire
Workability
X-ray diffraction
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Summary:This research studied the effect of recycled steel fibers extracted from twisted cable waste on the fresh and hardened states of high-performance concretes. Accordingly, slump, water absorption (WA), compressive strength (CS), flexural strength (FS), and split tensile strength (STS) were measured in the laboratory using mixtures generated by the response surface methodology (RSM). The RSM-based central composite design (CCD) was used to assess the influence of water-to-binder (W/B) ratios from 0.27 to 0.31, length-to-diameter (L/d = 46 to 80) and steel fiber content (SFC) in the range of 19 to 29 kg/m3 on the behavior of high-performance fiber-reinforced concrete (HPFRC). The accuracy and validation of the generated models were evaluated by employing analysis of variance (ANOVA) and optimal parameters. The experimental findings revealed that the use of an L/d ratio of 63, a W/B ratio of approximately 0.28, and an SFC of around 22 kg/m3 resulted in high workability in terms of slump. While a notable increase in compressive strength was observed when employing an L/d ratio of approximately 70, a W/B ratio of around 0.28, and the maximum SFC of 29 kg/m3, as confirmed by scanning electron microscopy (SEM) and X-ray diffraction (XRD) analysis.
ISSN:2075-5309
2075-5309
DOI:10.3390/buildings13092290