Effects of Moisture on Ultrasound Propagation in Cement Mortar

被引：5

作者：

Ju, Taeho ^{[1
]}

Li, Shuaili ^{[1
]}

Achenbach, Jan ^{[1
]}

Qu, Jianmin ^{[1
]}

机构：

[1] Northwestern Univ, Dept Civil & Environm Engn, Evanston, IL 60208 USA

来源：

41ST ANNUAL REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION, VOL 34 | 2015年 / 1650卷

关键词：

D O I：

10.1063/1.4914756

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In concrete structures, moisture is often a major cause of chemically related degradations such as alkaline-silica reaction. To develop ultrasonic nondestructive evaluation techniques for monitoring such chemical degradations, it is necessary to understand how moisture affects the propagation of ultrasound in concrete. To this end, the objective of this paper is to experimentally determine the correlation between the moisture content in cement mortar and ultrasonic wave propagation. Specifically, effects of moisture on the ultrasonic phase velocity and attenuation are examined. It is found that, for the cement mortar samples considered in this study, moisture has negligible effect on the ultrasonic phase velocity. However, moisture can significantly increase the attenuation of ultrasound in cement mortar even in the sub-MHz frequency range.

引用

页码：1409 / 1414

页数：6

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