In engineering and subterranean structure design, understanding rock tensile strength is essential due to its critical role in various applications such as drilling, blasting, geothermal energy extraction, and nuclear waste storage. The rapid pace of infrastructure development and the lack of comprehensive scientific literature highlight the need for robust analysis of rock mechanical properties. This study investigates the effects of high-temperature treatment on the tensile strength of sandstone across a temperature range from 25 °C to 1000 °C. To achieve this, we employed two tensile strength testing methods: the Brazilian disc method and the flattened Brazilian disc method, alongside three distinct cooling techniques—slow cooling, moderate cooling, and rapid cooling. The current experimental results reveal a significant reduction in tensile strength for sandstone subjected to high temperatures compared to its ambient temperature counterpart. The study also emphasizes the importance of incorporating material constitutive laws into computational models to accurately represent dynamic phenomena, particularly those induced by seismic activities and other dynamic events. The dynamic behaviour of rock materials under transient loading conditions differs from static conditions, making dynamic testing methodologies crucial for realistic simulations. This research underscores the impact of temperature and cooling methods on rock mechanics and provides essential data for enhancing the design and analysis of subterranean structures and dynamic loading scenarios.Highlights<UnorderedList Mark="Bullet"> <ItemContent> Investigates the influence of thermal treatment on the dynamic tensile strength of Jodhpur sandstone. </ItemContent> <ItemContent> Compares static and dynamic tensile behaviour using Brazilian disc and flattened Brazilian disc specimens. </ItemContent> <ItemContent> Analyses the effect of specimen geometry on failure mode and tensile strength. </ItemContent> <ItemContent> Elucidates degradation patterns in sandstone under increasing thermal exposure up to 1000 °C. </ItemContent> <ItemContent> Provides insights into the suitability of specimen shape for characterizing the tensile strength of thermally damaged rocks. </ItemContent> </UnorderedList>

Evaluation of Dynamic Behaviour in Thermally Treated Jodhpur Sandstone: Effects of Cooling Rates on Mechanical Performance and Structural Integrity

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发表日期：

2025年10月22日

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Shivani Verma,
Nikhil Ninad Sirdesai,
Manmohan Dass Goel

摘要

In engineering and subterranean structure design, understanding rock tensile strength is essential due to its critical role in various applications such as drilling, blasting, geothermal energy extraction, and nuclear waste storage. The rapid pace of infrastructure development and the lack of comprehensive scientific literature highlight the need for robust analysis of rock mechanical properties. This study investigates the effects of high-temperature treatment on the tensile strength of sandstone across a temperature range from 25 °C to 1000 °C. To achieve this, we employed two tensile strength testing methods: the Brazilian disc method and the flattened Brazilian disc method, alongside three distinct cooling techniques—slow cooling, moderate cooling, and rapid cooling. The current experimental results reveal a significant reduction in tensile strength for sandstone subjected to high temperatures compared to its ambient temperature counterpart. The study also emphasizes the importance of incorporating material constitutive laws into computational models to accurately represent dynamic phenomena, particularly those induced by seismic activities and other dynamic events. The dynamic behaviour of rock materials under transient loading conditions differs from static conditions, making dynamic testing methodologies crucial for realistic simulations. This research underscores the impact of temperature and cooling methods on rock mechanics and provides essential data for enhancing the design and analysis of subterranean structures and dynamic loading scenarios.

Highlights

Investigates the influence of thermal treatment on the dynamic tensile strength of Jodhpur sandstone.

Compares static and dynamic tensile behaviour using Brazilian disc and flattened Brazilian disc specimens.

Analyses the effect of specimen geometry on failure mode and tensile strength.

Elucidates degradation patterns in sandstone under increasing thermal exposure up to 1000 °C.

Provides insights into the suitability of specimen shape for characterizing the tensile strength of thermally damaged rocks.