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The mechanical properties of limestone such as the stress-strain curve, the variable characteristics of peak strength and the modulus of elasticity of limestone were studied under the action of temperatures ranging from room temperature to 800 °C.Our results show that:1) the temperature has not clear effect on the mechanical properties of limestone from room temperature to 600 °C.However, the mechanical properties of limestone deteriorate rapidly when the temperature is above 600 °C.In this case, the peak stress and modulus of elasticity decrease rapidly.When the temperature reaches 800 °C, the entire process, showing the stress-strain curve is displayed indicating an obvious state of plastic-deformation;2) the failure mode of limestone shows the breakdown of tensile strength from room temperature to 600 °C, as well as the compress shearing damage over 600 °C;3) combining our test results with the concept of thermal damage, a thermal damage equation was derived.
The mechanical properties of limestone such as the stress-strain curve, the variable characteristics of peak strength and the modulus of elasticity of limestone were studied under the action of temperature ranging from room temperature to 800 ° C.Our results show that: 1) the temperature has not clear effect on the mechanical properties of limestone from room temperature to 600 ° C.However, the mechanical properties of limestone deteriorate rapidly when the temperature is above 600 ° C.In this case, the peak stress and modulus of elasticity decrease rapidly .When the temperature reaches 800 ° C, the entire process, showing the stress-strain curve is displayed an obvious state of plastic-deformation; 2) the failure mode of limestone shows the breakdown of tensile strength from room temperature to 600 ° C , as well as the compress shearing damage over 600 ° C; 3) combining our test results with the concept of thermal damage, a thermal damage equation was derived.