Spatial gradient distributions of thermal shock-induced damage to granite
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In this paper, the spatial gradient distributions of thermal shock-induced damage to granite with respect to associated deterioration mechanisms were investigated by computed tomography (CT) and image analysis techniques, and the influence of the preheating temperature on the spatial gradients of the damage was discussed.Abstract:
In this study, we attempted to investigate the spatial gradient distributions of thermal shock-induced damage to granite with respect to associated deterioration mechanisms. First, thermal shock experiments were conducted on granite specimens by slowly preheating the specimens to high temperatures, followed by rapid cooling in tap water. Then, the spatial gradient distributions of thermal shock-induced damage were investigated by computed tomography (CT) and image analysis techniques. Finally, the influence of the preheating temperature on the spatial gradients of the damage was discussed. The results show that the thermal shock induced by rapid cooling can cause more damage to granite than that induced by slow cooling. The thermal shock induced by rapid cooling can cause spatial gradient distributions of the damage to granite. The damage near the specimen surface was at a maximum, while the damage inside the specimen was at a minimum. In addition, the preheating temperature can significantly influence the spatial gradient distributions of the thermal shock-induced damage. The spatial gradient distribution of damage increased as the preheating temperature increased and then decreased significantly over 600 °C. When the preheating temperature was sufficiently high (e.g. 800 °C), the gradient can be ignored.read more
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References
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An experimental investigation on thermal damage and failure mechanical behavior of granite after exposure to different high temperature treatments
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TL;DR: In this article, the authors evaluate the thermal effects on the geophysical properties of granite and show that the dynamic strength decreases linearly as temperature increases but increases as the impact pressure increases.
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Evolution of thermal damage and permeability of Beishan granite
TL;DR: In this paper, thermal damage in Beishan granite subjected to high temperature treatment (from 100°C to 800°C at different heating rates, ranging from 1 to 15°C/min) is studied in order to assess the thermal effect on physical and mechanical properties.
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W.G.P. Kumari,Pathegama Gamage Ranjith,Mandadige Samintha Anne Perera,Mandadige Samintha Anne Perera,Bernard Chen,Ilmutdin M. Abdulagatov +5 more
TL;DR: In this article, the effect of increasing temperature (from room temperature to 800 °C) followed by two cooling methods (both rapid and slow) on the mechanical behavior of Australian Strathbogie granite under uniaxial conditions was investigated.
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An investigation of thermal effects on micro-properties of granite by X-ray CT technique
TL;DR: In this article, the thermal effects on micro-properties of granite were experimentally studied and two indexes (heterogeneity coefficient and anisotropy coefficient) were proposed to describe the micro properties of granite.