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<p>The foamed ceramic integrated panel is an emerging building envelope solution prized for its excellent thermal insulation and durability. However, the mechanisms and conditions triggering its cracking remain insufficiently studied. This study combined experimental characterization with theoretical modeling to investigate its cracking behavior under transient thermal loads. Key thermo-mechanical properties were measured, and a thermal conduction model was developed to derive transient temperature fields, deformation, and stress. Results identify the foamed ceramic panel as the system’s weak layer, with a mean tensile strength of 0.50 ± 0.12 MPa and a mean compressive modulus of 696 ± 143 MPa. The critical cracking temperature during transient cooling was determined to be −54.8±7.7 °C, since the lower bound (−47℃) is below the extreme hailstorm temperature drop (−50℃), such weather events may induce cracking—a finding consistent with experimental observations. The findings provide a theoretical foundation for the anti-cracking design and optimization of such systems and offer new insights for studying other insulation materials.</p>

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Research on cracking of foamed ceramic integrated panel external wall insulation system under transient thermal loads

  • 期刊论文

  • 发表日期：

    2026年7月24日

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  • Bin Sha,
  • Gang Li,
  • Xiangsong Wu

摘要

The foamed ceramic integrated panel is an emerging building envelope solution prized for its excellent thermal insulation and durability. However, the mechanisms and conditions triggering its cracking remain insufficiently studied. This study combined experimental characterization with theoretical modeling to investigate its cracking behavior under transient thermal loads. Key thermo-mechanical properties were measured, and a thermal conduction model was developed to derive transient temperature fields, deformation, and stress. Results identify the foamed ceramic panel as the system’s weak layer, with a mean tensile strength of 0.50 ± 0.12 MPa and a mean compressive modulus of 696 ± 143 MPa. The critical cracking temperature during transient cooling was determined to be −54.8±7.7 °C, since the lower bound (−47℃) is below the extreme hailstorm temperature drop (−50℃), such weather events may induce cracking—a finding consistent with experimental observations. The findings provide a theoretical foundation for the anti-cracking design and optimization of such systems and offer new insights for studying other insulation materials.