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<p>Rocks have been an integral component in construction and infrastructure from ancient times. The variation in strength properties of rock used as construction material is particularly important. Accidental fires cause structural damage and deterioration. Additionally, when addressing structural fires affecting monumental and historical heritage sites, it is crucial to conduct thorough investigations and implement effective mitigation strategies to counteract the damage incurred. The rise in temperature alters the mineralogy and morphology of rocks. To quantify thermally-induced damage, researchers have explored its correlation with the elastic modulus of the rock. Although, an accurate quantification of elastic modulus entails specialized laboratory facilities. In this study, the authors aim to develop novel damage models utilizing the physical and mechanical properties of a specific type of North Indian rock i.e., Bundelkhand granite (BG), commonly employed in the construction of Indian monuments. The study highlights the fire induced alterations by conducting thermal experiments on Bundelkhand granite ranging from room temperature to 1000°C with a heating rate of 10°C/minutes. Furthermore, the decreases in the strength parameters and conventional modulus-based damage model for BG are discussed and quantified, respectively. Nonetheless, the novel model proposed in this study is effectively utilized to quantify the thermal damage of BG at high temperatures. Subsequently, these models undergo rigorous comparison with a conventional model. This comparative analysis sheds light on the efficacy and reliability of the novel approach in assessing thermal damage, offering valuable insights for enhancing fire safety protocols and preserving historical structures with greater precision and efficiency.</p>

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Novel Damage Quantification and Strength Degradation of Thermally Treated Bundelkhand Granite: An Indian Heritage Stone

  • 期刊论文

  • 发表日期：

    2025年2月8日

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  • Rahul Rooplal Katre,
  • Shivani Verma,
  • Rishabh Dwivedi,
  • Sandeep Panchal,
  • Nikhil Ninad Sirdesai,
  • Kumar Hemant Singh,
  • Trilok Nath Singh

摘要

Rocks have been an integral component in construction and infrastructure from ancient times. The variation in strength properties of rock used as construction material is particularly important. Accidental fires cause structural damage and deterioration. Additionally, when addressing structural fires affecting monumental and historical heritage sites, it is crucial to conduct thorough investigations and implement effective mitigation strategies to counteract the damage incurred. The rise in temperature alters the mineralogy and morphology of rocks. To quantify thermally-induced damage, researchers have explored its correlation with the elastic modulus of the rock. Although, an accurate quantification of elastic modulus entails specialized laboratory facilities. In this study, the authors aim to develop novel damage models utilizing the physical and mechanical properties of a specific type of North Indian rock i.e., Bundelkhand granite (BG), commonly employed in the construction of Indian monuments. The study highlights the fire induced alterations by conducting thermal experiments on Bundelkhand granite ranging from room temperature to 1000°C with a heating rate of 10°C/minutes. Furthermore, the decreases in the strength parameters and conventional modulus-based damage model for BG are discussed and quantified, respectively. Nonetheless, the novel model proposed in this study is effectively utilized to quantify the thermal damage of BG at high temperatures. Subsequently, these models undergo rigorous comparison with a conventional model. This comparative analysis sheds light on the efficacy and reliability of the novel approach in assessing thermal damage, offering valuable insights for enhancing fire safety protocols and preserving historical structures with greater precision and efficiency.