Effects of specimen height on the acoustic emission rate value ‘a’ for cement mortar
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- 作者：Yan Wang 王岩 ; Hongxiang Hu ; Guijuan Lu…
- 刊名：Journal of Wuhan University of Technology--Materials Science Edition
- 出版年：2016
- 出版时间：August 2016
- 年：2016
- 卷：31
- 期：4
- 页码：843-850
- 全文大小：1,492 KB
- 刊物类别：Chemistry and Materials Science
- 刊物主题：Chemistry
Materials Science
Chinese Library of Science - 出版者：Wuhan University, co-published with Springer
- ISSN：1993-0437
- 卷排序：31
文摘
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.Key wordscement mortarconcreteacoustic emissiondamage evolutiona valuerate process analysis