Effects of heating methods on the mechanical properties of granite

Subjects: Mechanics >> Solid Mechanics submitted time 2024-06-17 Cooperative journals: 《应用力学学报》

GAO Jingwei

Abstract：
To compared the microwave and conventional heating effects on the mechanical properties of granite,microwave and conventional heating methods were performed to heat granite specimens at different temperature(300,500,600,800 ℃).After heating,the density,P-wave velocity,and uniaxial compression tests were performed.The effects of heating temperature on the density,P-wave velocity,stress-strain curve,uniaxial compression strength and elastic modulus were analyzed under the two heating methods.The microwave and conventional heating effects on the granite properties were discussed.The results show that under the two kinds of heating methods,the density,P-wave velocity,uniaxial compression strength,and elastic modulus all decrease as heating temperature increases,and the reduction rate is the highest from 500 to 600 ℃.Under the same heating temperature condition,the decreasing extent in density,P-wave velocity,uniaxial compression strength,and elastic modulus of granite after microwave heating is higher than that after conventional heating.The difference induced by the two heating methods increases as heating temperature increases.Compared with conventional heating,the microwave heating time is shorter,generally only 1/7 of the conventional heating time.Therefore,microwave heating is more efficient in degrading granite performance.

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