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<p>Despite extensive research on fiber-reinforced concrete (FRC), few studies have examined the combined effects of high-range water-reducing admixtures (HRWRs) and nylon fibers, particularly regarding the optimization of their dosages to achieve equilibrium between workability and mechanical performance. This study aims to fill this gap by experimentally investigating the impact of varying the HRWR content on the properties of nylon fiber-reinforced concrete (NFRC). Eight concrete mixtures were designed to attain a target compressive strength of 20.7&#xa0;MPa (3000 psi), incorporating four HRWR dosages (0%, 0.5%, 1.0%, and 1.5%), both with and without 1% nylon fiber. A total of 48 samples were prepared from Portland composite cement, sand, and brick chips and subsequently tested for slump, compressive strength, splitting tensile strength, and modulus of elasticity after 28 days of curing. The results indicated that a 0.5% HRWR dosage significantly improved the workability while preserving the strength. Additionally, the combination of 0.5% HRWR with 1% nylon fibers enhanced ductility, uniform fiber distribution, and overall structural integrity. The optimized mixture (0.5% HRWR + 1% nylon fiber) exhibited superior performance, confirming the synergistic advantages of the interaction between the admixture and fibers. These findings offer valuable insights to produce ductile, high-performance FRCs suitable for contemporary structural applications.</p>

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Performance optimization of nylon fiber-reinforced concrete using high-range water reducers

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年4月16日

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  • Md. Sadiqul Islam,
  • Faruk Patowary,
  • Md. Mydul Islam,
  • Badhon Singha

摘要

Despite extensive research on fiber-reinforced concrete (FRC), few studies have examined the combined effects of high-range water-reducing admixtures (HRWRs) and nylon fibers, particularly regarding the optimization of their dosages to achieve equilibrium between workability and mechanical performance. This study aims to fill this gap by experimentally investigating the impact of varying the HRWR content on the properties of nylon fiber-reinforced concrete (NFRC). Eight concrete mixtures were designed to attain a target compressive strength of 20.7 MPa (3000 psi), incorporating four HRWR dosages (0%, 0.5%, 1.0%, and 1.5%), both with and without 1% nylon fiber. A total of 48 samples were prepared from Portland composite cement, sand, and brick chips and subsequently tested for slump, compressive strength, splitting tensile strength, and modulus of elasticity after 28 days of curing. The results indicated that a 0.5% HRWR dosage significantly improved the workability while preserving the strength. Additionally, the combination of 0.5% HRWR with 1% nylon fibers enhanced ductility, uniform fiber distribution, and overall structural integrity. The optimized mixture (0.5% HRWR + 1% nylon fiber) exhibited superior performance, confirming the synergistic advantages of the interaction between the admixture and fibers. These findings offer valuable insights to produce ductile, high-performance FRCs suitable for contemporary structural applications.