Variation of mechanical properties of granite after high-temperature treatment

  • Jianjun Hu
  • Qiang Sun
  • Xiaohua Pan
Original Paper


Variations in the mechanical properties (compressive strength, elastic modulus, tensile strength, and fracture toughness) of granite were analyzed as functions of temperature. It was found that above 200 °C, tensile strength and fracture toughness tended to decrease with temperature, while variations in the compressive strength and elastic modulus demonstrated decreasing trends when the heating temperature exceeded 400 °C. The temperature ranges of room temperature—200 and above 600 °C—corresponded to an undamaged state and strongly/completely damaged state, respectively. It is suggested that 400 °C might be a critical threshold of thermal damage to granite. Based on results of statistical tests, a sharp decrease in mechanical properties can be recognized, accompanied by a drastic growth in peaking strain and acoustic emission rate. This phenomenon may be associated with the α/β phase transition of quartz.


Granite Mechanical properties Expansion Chemical reaction Damage coefficient Critical threshold 


Funding information

This research was supported by “the Fundamental Research Funds for the Central Universities” (no. 2017XKZD07) and the Priority Academic Program Development of Jiangsu Higher Education Institutions.


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Copyright information

© Saudi Society for Geosciences 2018

Authors and Affiliations

  1. 1.School of Resources and GeosciencesChina University of Mining and TechnologyXuzhouPeople’s Republic of China
  2. 2.School of Civil and Environmental EngineeringNanyang Technological UniversitySingaporeSingapore

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