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<p>Understanding the tensile strength characteristics of construction materials after exposure to high temperatures is crucial, as these properties directly influence the structural integrity and safety of fire-prone buildings. Sandstone, widely used in construction for its durability and aesthetics, requires particular attention under such conditions. This study investigates the fire-induced behavior of Jodhpur sandstone by subjecting specimens to thermal treatments up to elevated temperatures, followed by three distinct cooling methods such as furnace, air, and water cooling representing realistic post-fire scenarios. Indirect tensile strength was evaluated using both the Brazilian disc (BD) and flattened Brazilian disc (FBD) methods to provide a comprehensive assessment of post-treatment performance. The findings demonstrate that rapid cooling results in the most severe strength reduction due to thermal shock, while gradual cooling leads to comparatively lower damage. Importantly, this work is among the first to systematically compare BD and FBD methods in assessing the tensile strength of thermally treated sandstone, revealing critical differences in their response profiles. These insights not only advance the understanding of sandstone’s thermal behavior but also offer practical guidance for fire safety design, post-fire damage evaluation, and informed material selection in construction.</p>

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Evaluating the Influence of Varied Specimen Shapes and Cooling Methods on the Tensile Strength of Thermally Treated Jodhpur Sandstone: Implications on Fire-Damaged Monuments

  • 期刊论文

  • 发表日期：

    2025年12月3日

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  • Shivani Verma,
  • Nikhil Ninad Sirdesai,
  • Manmohan Dass Goel

摘要

Understanding the tensile strength characteristics of construction materials after exposure to high temperatures is crucial, as these properties directly influence the structural integrity and safety of fire-prone buildings. Sandstone, widely used in construction for its durability and aesthetics, requires particular attention under such conditions. This study investigates the fire-induced behavior of Jodhpur sandstone by subjecting specimens to thermal treatments up to elevated temperatures, followed by three distinct cooling methods such as furnace, air, and water cooling representing realistic post-fire scenarios. Indirect tensile strength was evaluated using both the Brazilian disc (BD) and flattened Brazilian disc (FBD) methods to provide a comprehensive assessment of post-treatment performance. The findings demonstrate that rapid cooling results in the most severe strength reduction due to thermal shock, while gradual cooling leads to comparatively lower damage. Importantly, this work is among the first to systematically compare BD and FBD methods in assessing the tensile strength of thermally treated sandstone, revealing critical differences in their response profiles. These insights not only advance the understanding of sandstone’s thermal behavior but also offer practical guidance for fire safety design, post-fire damage evaluation, and informed material selection in construction.