Conference Papers
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Item The Physical and Mechanical Properties of Closepet Granite After Thermal Treatments with Water and Brine Cooling Conditions(Springer Science and Business Media Deutschland GmbH, 2025) Raj, M.S.V.; Srinivasan, V.In recent years, efforts to utilize geothermal systems as a clean and renewable energy resource have gained considerable significance. This is due to unprecedented carbon emissions from the conventional fossil fuel system, which resulted in increased carbon footprints. Granite rocks, often prioritized for geothermal extraction, are relatively intact. Hence, such reservoirs require induced fracturing for the development of an enhanced geothermal system. Several studies have been carried out to clarify the fundamental behavior of rocks encountered in the geothermal energy systems and to assess their effectiveness during energy production. In this study, granite rocks belonging to the Closepet granitoid of Eastern Dharwar Craton were investigated for their physical and mechanical stability under different fluid conditions after heating to elevated temperature levels. This study experimentally investigates the influence of heating and cooling by different fluids on the physical and mechanical properties of Closepet granite. The granite specimens prepared as per international standards were heated at specific temperatures of 100℃, 200℃, 300℃, 400℃, and 500 °C. The heated samples were quenched in two different fluids, like brine and water. The influence of different cooling fluids on the physical properties like P-wave, bulk density, and the mechanical properties such as Uniaxial compressive strength (UCS), Brazilian tensile strength (BTS), Elastic modulus (E), and was determined experimentally. The damage introduced by the thermal treatment was evaluated from the arrived physical and mechanical parameters. The experimental results suggested that the physical and mechanical properties under brine quenching are more severe than those under the water cooling program. This study provides an insight into the enhanced effect of fracturing fluid on the behavior of rocks under geothermal energy production. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2025.