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<p>Geopolymer composite, a sustainable alternative to ordinary Portland cement (OPC), suffers from inherent brittleness. This review examines the role of synthetic fibers in improving geopolymer composites. Fibers such as polypropylene (PP), polyethylene (PE), polyvinyl alcohol (PVA), nylon, carbon fibers (CF), and others (acrylic, aramid, polyester, and glass) are discussed. It systematically evaluates how these fibers improve mechanical performance (compressive, flexural, and tensile strength, toughness, ductility) and durability (shrinkage, crack control, chemical resistance). The study highlights that fiber type, geometry, volume fraction, and interfacial bond with the geopolymer matrix are critical factors. Furthermore, it explores emerging multifunctional applications, such as the self-sensing and electrothermal capabilities enabled by carbon fibers. Although challenges exist, like lower workability and dosage limits, adding synthetic fibers effectively converts brittle geopolymers into ductile, high-performance composites. This review is a useful guide for researchers and engineers designing advanced fiber-reinforced geopolymer concrete for sustainable construction.</p> Graphical abstract <p></p>

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Advances in the use of synthetic fibers for enhancing geopolymer properties

  • 期刊论文

  • 发表日期：

    2026年1月27日

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  • Hussain Mehdi,
  • Muhammad Salman Ali,
  • Noman Ahmed Khan,
  • ⁠Fasiuddin Aijaz Mohammad

摘要

Geopolymer composite, a sustainable alternative to ordinary Portland cement (OPC), suffers from inherent brittleness. This review examines the role of synthetic fibers in improving geopolymer composites. Fibers such as polypropylene (PP), polyethylene (PE), polyvinyl alcohol (PVA), nylon, carbon fibers (CF), and others (acrylic, aramid, polyester, and glass) are discussed. It systematically evaluates how these fibers improve mechanical performance (compressive, flexural, and tensile strength, toughness, ductility) and durability (shrinkage, crack control, chemical resistance). The study highlights that fiber type, geometry, volume fraction, and interfacial bond with the geopolymer matrix are critical factors. Furthermore, it explores emerging multifunctional applications, such as the self-sensing and electrothermal capabilities enabled by carbon fibers. Although challenges exist, like lower workability and dosage limits, adding synthetic fibers effectively converts brittle geopolymers into ductile, high-performance composites. This review is a useful guide for researchers and engineers designing advanced fiber-reinforced geopolymer concrete for sustainable construction.

Graphical abstract