Study on mechanical acoustic emission sources in fresh concrete

被引：19
|
作者：
Dzaye, Evin Dildar [1 ,2 ]
De Schutter, Geert [2 ]
Aggelis, Dimitrios G. [1 ]
机构：
[1] Vrije Univ Brussel, Dept Mech Mat & Construct, Pl Laan 2, B-1050 Brussels, Belgium
[2] Univ Ghent, Dept Struct Engn, Magnel Lab Concrete Res, Technol Pk Zwijnaarde 904, B-9052 Ghent, Belgium
来源：
ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING | 2018年 / 18卷 / 03期
关键词：
Acoustic emission; Aggregate; Bubble; Impact; Simulation; DAMAGE EVALUATION; COMPRESSION;
D O I：
10.1016/j.acme.2017.12.004
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
Acoustic emission testing has proven very useful as a non-invasive monitoring method for several material processes. Recently several studies have emerged related to fresh concrete monitoring, as AE has the sensitivity to record waves from many different processes, even though no external load is applied to the specimens. Due to the complexity of the activity including among others formation of hydrates, settlement, water migration, early age cracking, the accumulated AE cannot be easily explained. In the present paper, two mechanisms of mechanical origin (aggregate and bubble movement through the paste) are isolated and the characteristics of their emissions are studied. Experimental results are complemented with numerical simulations to enhance the understanding due to the complexity of the wave propagation problem. (C) 2017 Politechnika Wroclawska. Published by Elsevier Sp. z o.o. All rights reserved.
引用
收藏
页码：742 / 754
页数：13
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