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Evaluating the thermal-cooling induced effects on the Ambela granite properties (from Pakistan) using experimental and image processing techniques

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Abstract

A series of experiments were conducted on the Ambela granite at predetermined temperatures (25, 300, 600, and 900 °C) for 3 h and cooled under slow and rapid conditions. The experimental results show that as the temperature rises, porosity increases (9.5%), while mass and P-wave decrease by 0.1% and 14.0%, respectively. Furthermore, increasing temperature’s mediated effects on granite damage were significantly higher in rapid cooling, resulting in a decrease of 85% and 88% in uniaxial compressive strength and Young’s modulus, respectively. As this experimental procedure is expensive and time-consuming, therefore, considering the thermal-cooling effects, it is essential to capture these effects using sophisticated and cutting-edge technologies. In this regard, a compound microscope is used for thin section study and based on their results, a novel model is developed. This model is established on watershed segmentation, which is an image processing technique to capture the effect of thermal cooling on the porosity, crack propagation, and damage factor numerically. The model results were validated with experimental results, which give a correlation (R2) value of 0.99% and 0.93% for slow and rapid cooling, respectively. It was also noticed in the cooling that the average crack length initially increased with increases in temperature (25–300 °C) but then decreased from 600–900 °C. In the cooling process, significant changes in crack length were observed in rapid cooling compared to slow cooling.

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Acknowledgements

This research was supported by Researchers Supporting Project number (RSP2022R496), King Saud University, Riyadh, Saudi Arabia. Also, we are very thankful to Prof. A.J.S.(Sam) Spearing, Adjunct Professor, Department of Minerals, Energy and Chemical Engineering, Curtin University, Australia, for his help in proofreading.

Funding

This paper was supported by the National Key Basic Research Program of China (97 Program), the National Natural Science Foundation of China (51874280), the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD), and the Researchers Supporting Project number (RSP2022R496), King Saud University, Riyadh, Saudi Arabia.

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Correspondence to Liqiang Ma.

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We declare that we do not have any commercial or associative interest representing a conflict of interest in connection with the work submitted.

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Khan, N.M., Ma, L., Cao, K. et al. Evaluating the thermal-cooling induced effects on the Ambela granite properties (from Pakistan) using experimental and image processing techniques. Bull Eng Geol Environ 81, 506 (2022). https://doi.org/10.1007/s10064-022-03019-w

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  • DOI: https://doi.org/10.1007/s10064-022-03019-w

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