Corrosion mechanisms in reinforced concrete by acoustic emission

被引：115

作者：

Kawasaki, Yuma ^{[1
]}

Wakuda, Tomoyo ^{[2
]}

Kobarai, Tomoe ^{[2
]}

Ohtsu, Masayasu ^{[2
]}

机构：

[1] Ritsumeikan Univ, Dept Civil & Environm Engn, Kusatsu, Shiga 5258577, Japan

[2] Kumamoto Univ, Grad Sch Sci & Technol, Kumamoto 860, Japan

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2013年 / 48卷

关键词：

Acoustic emission; Corrosion-induced cracks; EPMA; lb-value; SiGMA; MOMENT TENSOR ANALYSIS; CLASSIFICATION;

D O I：

10.1016/j.conbuildmat.2013.02.020

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Continuous acoustic emission (AE) monitoring is applied to a cyclic wet and dry test of reinforced concrete beams. The onset of corrosion and the nucleation of corrosion-induced cracks in concrete are successfully identified, and then, cross-sections inside the concrete specimen are observed by an electron probe micro analyzer (EPMA). Results of AE parameter analysis are compared with the corrosion mechanisms observed by EPMA. Further, a relation between kinematical information of AE sources and nucleation of micro-cracks inside is identified by the SiGMA analysis and observed by the stereo-microscope. From these results, AE is a promising technique to quantitatively evaluate the corrosion process in concrete due to expansion of corrosion products at an early stage is demonstrated. Published by Elsevier Lid.

引用

页码：1240 / 1247

页数：8

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