Chloride Ion Transport in Fly Ash Mortar under Action of Fatigue Loading  

作　　者：王彩辉 孙伟 

机构地区：[1]School of Materials Science and Engineering,Southeast University,Nanjing,211189,China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2012年第6期1165-1171,共7页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the Scientific Research Foundation of Graduate School Southeast University(No.YBJJ1129);the National Natural Science Foundation of China(No. 51078081);the National Basic Research Program of China("973"Project)(No. 2009CB326200)

摘　　要：In order to study the chloride ion transport performance in fly ash addition mortar, a new method, in which the fatigue loading and chloride diffusion are undertaken simultaneously, was developed. This method realizes coupling the fatigue damage process and the process of chloride transporting of fly ash mortar. The transport performance of chloride in fly ash mortar specimens was studied under different stress levels. Moreover, the effect of fly ash content on transport performance of chloride ion in mortar was investigated. AE （Acoustic Emission） and SEM were used to acquire the damage distribution of mortar specimens under action of fatigue load. The results show that the diffusion coefficient of chloride in mortar specimens increases with stress level of fatigue loading. The addition of fly ash can mitigate the penetration of chloride ion. The results of microcmck 3D location acquired by AE, accompanied with crack characterizing from SEM, indicate that the damage degree of mortar specimen increases with stress level of fatigue loading. Furthermore, higher damage degree of mortar leads to more the chloride ion content in the sample.In order to study the chloride ion transport performance in fly ash addition mortar, a new method, in which the fatigue loading and chloride diffusion are undertaken simultaneously, was developed. This method realizes coupling the fatigue damage process and the process of chloride transporting of fly ash mortar. The transport performance of chloride in fly ash mortar specimens was studied under different stress levels. Moreover, the effect of fly ash content on transport performance of chloride ion in mortar was investigated. AE （Acoustic Emission） and SEM were used to acquire the damage distribution of mortar specimens under action of fatigue load. The results show that the diffusion coefficient of chloride in mortar specimens increases with stress level of fatigue loading. The addition of fly ash can mitigate the penetration of chloride ion. The results of microcmck 3D location acquired by AE, accompanied with crack characterizing from SEM, indicate that the damage degree of mortar specimen increases with stress level of fatigue loading. Furthermore, higher damage degree of mortar leads to more the chloride ion content in the sample.

关 键 词：new method fatigue load fly ash mortar chloride transport AE 

分 类 号：TU578.1[建筑科学—建筑技术科学] TU528.2