The article "Behavior of Fibers in Geopolymer Concrete: A Comprehensive Review" by Ujjwal Sharma et al. explores the use of fibers to enhance the mechanical properties of geopolymer concrete, a sustainable alternative to traditional Portland cement. The authors highlight the environmental benefits of geopolymer concrete, which reduces carbon dioxide emissions during production, but note that it exhibits quasi-brittle behavior, similar to conventional concrete. To address this issue, the study reviews various types of fibers, including steel, glass, polypropylene, and basalt fibers, and their effects on the mechanical properties of geopolymer concrete. Key findings include: - **Steel Fibers**: Enhance toughness, impact resistance, and abrasion resistance. Alumina-coated steel fibers improve interfacial bond strength and mechanical behavior. - **Glass Fibers**: Improve density, ductility, and crack resistance. Higher aspect ratio fibers enhance compressive strength more effectively. - **Polypropylene Fibers**: Increase crack resistance and reduce shrinkage. Optimal addition is 0.05% by weight, but high temperatures (600-900°C) significantly reduce compressive strength. - **Basalt Fibers**: Increase strength and influence fracture behavior. Carbon-coated spooled fibers show superior performance. The study concludes that fiber-reinforced geopolymer concrete (FRGC) has significant potential for commercialization, provided proper standards for manufacturing are established. The review also emphasizes the need for further research on economic feasibility, scalability, and environmental impact of FRGC.The article "Behavior of Fibers in Geopolymer Concrete: A Comprehensive Review" by Ujjwal Sharma et al. explores the use of fibers to enhance the mechanical properties of geopolymer concrete, a sustainable alternative to traditional Portland cement. The authors highlight the environmental benefits of geopolymer concrete, which reduces carbon dioxide emissions during production, but note that it exhibits quasi-brittle behavior, similar to conventional concrete. To address this issue, the study reviews various types of fibers, including steel, glass, polypropylene, and basalt fibers, and their effects on the mechanical properties of geopolymer concrete. Key findings include: - **Steel Fibers**: Enhance toughness, impact resistance, and abrasion resistance. Alumina-coated steel fibers improve interfacial bond strength and mechanical behavior. - **Glass Fibers**: Improve density, ductility, and crack resistance. Higher aspect ratio fibers enhance compressive strength more effectively. - **Polypropylene Fibers**: Increase crack resistance and reduce shrinkage. Optimal addition is 0.05% by weight, but high temperatures (600-900°C) significantly reduce compressive strength. - **Basalt Fibers**: Increase strength and influence fracture behavior. Carbon-coated spooled fibers show superior performance. The study concludes that fiber-reinforced geopolymer concrete (FRGC) has significant potential for commercialization, provided proper standards for manufacturing are established. The review also emphasizes the need for further research on economic feasibility, scalability, and environmental impact of FRGC.