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<p>Owing to its high fiber content, slurry-infiltrated fiber concrete (SIFCON) is renowned for its remarkable mechanical performance. However, problems related to the environmental impact and reliance on Portland cement persist. This study investigated the feasibility of using rice husk ash (RHA) as a sustainable binder in the geopolymer SIFCON in combination with various types and concentrations of steel fibers. Because of its controlled combustion at 600 °C, RHA offers significant energy savings compared to traditional cement production. Numerous mechanical and physical tests have been conducted, including compressive strength, flexural strength, splitting tensile strength, impact resistance, abrasion resistance, density, and water absorption tests. In addition, non-destructive tests, such as ultrasonic pulse velocity (UPV) and rebound hammer tests, were conducted. The results showed that the highest compressive strength (49.2 MPa) was obtained by adding 10% micro steel fibers, whereas the best flexural and splitting strengths (19.8 MPa and 6.1 MPa, respectively) were obtained by adding 10% hooked-end fibers. RHA effectively reduced CO₂ emissions while maintaining the required durability by substituting cement. This study highlights the potential of the RHA-based geopolymer SIFCON as an eco-friendly replacement for high-performance structural applications in the building sector.</p>

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Properties of rice husk ash-based geopolymer slurry-infiltrated fiber concrete with various steel fiber types and contents

  • 期刊论文

  • 发表日期：

    2026年3月12日

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  • Mohammed Ali Abdulrehman,
  • Khairunisak Abdul Razak,
  • Shah Rizal Kasim,
  • Khalid Mershed Eweed

摘要

Owing to its high fiber content, slurry-infiltrated fiber concrete (SIFCON) is renowned for its remarkable mechanical performance. However, problems related to the environmental impact and reliance on Portland cement persist. This study investigated the feasibility of using rice husk ash (RHA) as a sustainable binder in the geopolymer SIFCON in combination with various types and concentrations of steel fibers. Because of its controlled combustion at 600 °C, RHA offers significant energy savings compared to traditional cement production. Numerous mechanical and physical tests have been conducted, including compressive strength, flexural strength, splitting tensile strength, impact resistance, abrasion resistance, density, and water absorption tests. In addition, non-destructive tests, such as ultrasonic pulse velocity (UPV) and rebound hammer tests, were conducted. The results showed that the highest compressive strength (49.2 MPa) was obtained by adding 10% micro steel fibers, whereas the best flexural and splitting strengths (19.8 MPa and 6.1 MPa, respectively) were obtained by adding 10% hooked-end fibers. RHA effectively reduced CO₂ emissions while maintaining the required durability by substituting cement. This study highlights the potential of the RHA-based geopolymer SIFCON as an eco-friendly replacement for high-performance structural applications in the building sector.