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: College of Civil and Transportation Engineering,Hohai University,School of Architecture and Civil En
• 出 处: Journal of Wuhan University of Technology(Materials Science)
• 发表日期: 2016年04期
• 关键词: mortar compressive specimen accumulated monitored sizes destruction slight crack

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 mixture ratio 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.