Experimental study on the strength and deformation quality of granite with effect of high temperature
Experiments on granite under uniaxial compression at high temperature of 25~850℃ and after high temperature of 25~1300℃ were conducted to study the effect of temperature on rock strength and deformation quality.The results show that: (1) Fitting curves between temperature strain and thermal expansion coefficient with temperature are closely first order growth exponential function relation at high temperature.Temperature strain has mutagenicity after high temperature, which can not reflect rock deformation law at high temperature exactly.(2)Mechanical properties of granite weak continuously at high temperature.Compressive strength and elastic modulus show second order attenuation trend of exponential law.But mechanical properties show mutation state after high temperature, which is closely related to the alteration of rock crystal form and brittle-ductile transition.Regression curves between compressive strength and elastic modulus with temperature are closely polynomial curve.The results reflect the fundamental regulation of granites interior structure changing under the action of different temperature, which will provide some reference value to rock engineering involved in high temperature.
Granite Temperature Deformation Mechanical Characteristics
Xiao Li Xu Feng Gao
School of Architecture and Civil Engineering,Nantong University,Nantong 226019,China State Key Laboratory for Geomechanics & Deep Underground Engineering,China University of Mining and
国际会议
上海
英文
1275-1278
2012-10-19（万方平台首次上网日期，不代表论文的发表时间）