THEORETICAL ANALYSIS ON THE NUCLEATION OF MICRO-DAMAGE IN CEMENT MORTAR UNDER COMPRESSIVE LOADING AND SULFATE ATTACK

作     者：Jiankang Chen Hui Song Minghua Zhang Jian Ye 

作者机构：The Faculty of Mechanical Engineering and MechanicsNingbo University State Key Laboratory of Turbulence and Complex Systems Jiangsu Provincial Water Resources Department 

出 版 物：《Acta Mechanica Solida Sinica》 (固体力学学报（英文版）)

年 卷 期：2013年第26卷第1期

页      面：53-61页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0814[工学-土木工程] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：Project supported by the National Natural Science Foundation of China (Nos. 10932001,51079069,10972109,and 10802039) the National Basic Research Program of China (973 Program,No. 2009CB623203) the Ministry of Education of the People’s Republic of China (No. 20103305110001) K.C.Wong Magna Fund in Ningbo University 

主　　题：sulfate attack uniaxial compression micro-damage cement mortar Eshelby＇smethod 

摘      要：Effect of uniaxial compression on the nucleation of micro-damage in cement mortar under sulfate attack is investigated. Shape and size of micro-voids in cement mortar is detected using Micro Computed Tomography techniques. The formation of delayed ettringite crystal is analyzed using scanning electron microscope and energy disperse spectrum methods. Deformation of micro-voids and the distribution of stress at the surface of a micro-void are calculated. It is found that the nucleation of micro-cracks is caused by the tensile stress at the voids＇ surface, and such damage nucleation will be speeded up by the remote uniaxial compressive load.