Effects of Specimen Height on the Acoustic Emission Rate Value 'a' for Cement Mortar  

作　　者：王岩 HU Hongxiang LU Guijuan CHEN Shijie LIU Shaojun WANG Yao 

机构地区：[1]College of Civil and Transportation Engineering, Hohai University, Nanjing 270098, China [2]School of Architecture and Civil Engineering, Jinling Institute of Technology, Nanjing 210001, China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2016年第4期843-850,共8页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the National Natural Science Foundation of China(No.51009058);the Postdoctoral Science Foundation of China(No.2011M501160)

摘　　要：In order to study the size effect on the AE rate ’a’ value,three kinds of mix ratios were set up by different particle sizes and water cement ratios,45 cement mortar specimens with five different heights were tested under axial compression.And the whole damage processes were monitored by full-digital acoustic emission acquisition system,followed by an analysis of mechanical behavior and AE activity.The experimental results show that the height of the cement specimen has significant effects on the compressive strength and the acoustic emission rate ’a’ value,but a slight effect on the accumulated AE hits number,which is analyzed from aspects of failure process of cement mortar specimens.In order to study the size effect on the AE rate ’a’ value,three kinds of mix ratios were set up by different particle sizes and water cement ratios,45 cement mortar specimens with five different heights were tested under axial compression.And the whole damage processes were monitored by full-digital acoustic emission acquisition system,followed by an analysis of mechanical behavior and AE activity.The experimental results show that the height of the cement specimen has significant effects on the compressive strength and the acoustic emission rate ’a’ value,but a slight effect on the accumulated AE hits number,which is analyzed from aspects of failure process of cement mortar specimens.

关 键 词：mortar compressive specimen accumulated sizes monitored deterioration penetration slight automatically 

分 类 号：TQ177.62[化学工程—硅酸盐工业]