Issue 39

H. Xiao et alii, Frattura ed Integrità Strutturale, 39 (2017) 181-190; DOI: 10.3221/IGF-ESIS.39.18 181 Experimental analysis on physical and mechanical properties of thermal shock damage of granite He Xiao Institute of Geotechnical Engineering, Chongqing Jiaotong University, Chongqing, 400074, China. School of Geographical Sciences, Southwest University, Chongqing, 400715, China. hhexiao123@163.com Li Qing School of Geographical Sciences, Southwest University, Chongqing, 400715, China. Chen Hongkai, Tang Hongmei, Wang Linfeng Institute of Geotechnical Engineering, Chongqing Jiaotong University, Chongqing, 400074, China. A BSTRACT . The purpose of this study was to explore the changes of mechanical and physical properties of granite under different thermal loading effects. Uniaxial compression experiments studying the rules of the influence of temperature load on mechanical properties of granite were carried out. After high-temperature heating at above 600 °C, granite tended to have stronger ductility and plasticity as well as declined peak stress and compressive strength. Thermogravimetry - differential scanning calorimetry (TG-DSC) analysis results showed that, thermal load at different temperatures induced reactions such as water loss, oxidation and crystallization in the microstructure of granite, which led to physical changes of granite. Hence it is concluded that, heating can significantly weaken the mechanical performance of granite, which provides an important support for the optimization of heating assisted processing of granite. It also reveals that, heating assisted cutting technique can effectively lower energy consumption and improve processing efficiency. K EYWORDS . Granite; Damage; Differential scanning colorimetry analysis; Uniaxial compression thermogravimetry analysis. Citation: Xiao, H., Qing, L., Hongkai, C., Hongmei, T., Linfeng, W., Experimental analysis on physical and mechanical properties of thermal shock damage of granite, Frattura ed Integrità Strutturale, 39 (2017) 181-190. Received: 25.08.2016 Accepted: 10.10.2016 Published: 01.01.2017 Copyright: © 2017 This is an open access article under the terms of the CC-BY 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. I NTRODUCTION ranite, a kind of highly hard and brittle material, is featured by high strength and stable physical and chemical performance. Granite products, which look elegant and beautiful, have been widely applied in fields such as architectural ornament, precision machine tool manufacture, etc [1-3]. Currently, the processing of granite G