Properties of failure mode and thermal damage for limestone at high temperature

作     者：MAO Xian-biao ZHANG Lian-ying LI Tian-zhen LIU Hai-shun 

作者机构：School of Sciences China University of Mining ＆ Technology Xuzhou Jiangsu 221008 China State Key Laboratory of Geomechanics and Deep Underground Engineering China University of Mining ＆ Technology Xuzhou Jiangsu 221008 China School of Mathematics and Physical Science Xuzhou Institute of Technology Xuzhou Jiangsu 221008 China 

出 版 物：《Mining Science and Technology》 (矿业科学技术（英文版）)

年 卷 期：2009年第19卷第3期

页      面：290-294页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：Projects 50490273 supported by the National Natural Science Foundation of China 2007CB209400 by the National Basic Research Program of China 08KJD130003 by the Basic Research Program of University in Jiangsu Province XKY2007219 by Xuzhou Institute of Technology 

主　　题：limestone high temperature effect mech-anical properties clamage 

摘      要：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 °*** results show that:1) the temperature has not clear effect on the mechanical properties of limestone from room temperature to 600 °***, the mechanical properties of limestone deteriorate rapidly when the temperature is above 600 °*** this case, the peak stress and modulus of elasticity decrease *** 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.