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<p>Geopolymers are known to exhibit excellent thermal stability under elevated temperature exposure, highlighting their potential as surface-protective coatings for fire resistance applications. This thermal stability is primarily attributed to matrix densification, pore refinement, and phase crystallization, as demonstrated by previous studies on thermal behavior, microstructural evolution, phase transformation, tomography, and residual mechanical strength. This review provides a critical discussion of the thermal performance, microstructural characteristics, and coating behavior of geopolymers, with particular emphasis on potential for intumescence. Despite the promising fire protection capabilities observed, the underlying mechanisms of intumescence in geopolymer systems remain insufficiently understood specifically regarding the contribution of chemical composition. Therefore, this review also identifies key research gaps and proposes future directions to advance the development and application of geopolymer-based intumescent coatings.</p>

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Review: geopolymers for fire protection applications

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年9月19日

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  • Rosnita Mohamed,
  • Mohd Mustafa Al Bakri Abdullah,
  • Rafiza Abd Razak,
  • Tung Lik Lee,
  • Thanongsak Imjai,
  • Md Azree Othuman Mydin,
  • Zarina Yahya,
  • Pilomeena Arokiasamy,
  • Dickson Ling Chuan Hao

摘要

Geopolymers are known to exhibit excellent thermal stability under elevated temperature exposure, highlighting their potential as surface-protective coatings for fire resistance applications. This thermal stability is primarily attributed to matrix densification, pore refinement, and phase crystallization, as demonstrated by previous studies on thermal behavior, microstructural evolution, phase transformation, tomography, and residual mechanical strength. This review provides a critical discussion of the thermal performance, microstructural characteristics, and coating behavior of geopolymers, with particular emphasis on potential for intumescence. Despite the promising fire protection capabilities observed, the underlying mechanisms of intumescence in geopolymer systems remain insufficiently understood specifically regarding the contribution of chemical composition. Therefore, this review also identifies key research gaps and proposes future directions to advance the development and application of geopolymer-based intumescent coatings.