Ultrasonic Coda Wave Monitoring of Alkali-Silica Reactivity in Concrete Laboratory Prisms

IF 0.5 4区材料科学 Q4 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Materials Evaluation Pub Date : 2022-10-01 DOI:10.32548/2022.me-04248

Sina Mehdinia, K. S. T. Chopperla, A. Hafiz, T. Schumacher, J. Ideker

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引用次数: 3

Abstract

Alkali-silica reaction (ASR) is a deleterious reaction in concrete that leads to the expansion and cracking of concrete. Laboratory approaches to monitor concrete for ASR activity are often lengthy and depend on an operator for regular measurements. The aim of this research is to develop an automated and reliable monitoring approach based on ultrasonic coda (or diffuse) wavefields, which are highly sensitive to minute and slowly occurring changes in a material—ideal for ASR. In this paper, the proposed approachis introduced along with an experimental study that compares ultrasonic coda wave monitoring data with traditional expansion measurements following ASTM C1293. A simple, fast, and robust algorithm to track a selected coda wave feature is proposed and evaluated and was applied to the recorded data. The monitored concrete prisms were designed to have three different levels of ASR activity by varying the lithium admixture dosage. The proposed approach was found to be promising. The process is automated and the monitoring of the specimens using coda wavefields was able to clearly differentiate the mixtures with varying ASR expansions.

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混凝土实验室棱镜中碱-硅反应性的超声尾波监测

碱硅酸反应（ASR）是混凝土中的一种有害反应，会导致混凝土膨胀和开裂。监测混凝土ASR活动的实验室方法通常很长，并且依赖于操作员进行定期测量。这项研究的目的是开发一种基于超声尾波（或扩散波）场的自动可靠监测方法，该方法对材料中微小且缓慢发生的变化高度敏感，是ASR的理想选择。在本文中，介绍了所提出的方法，并进行了一项实验研究，将超声波尾波监测数据与符合ASTM C1293的传统膨胀测量数据进行了比较。提出了一种简单、快速、稳健的算法来跟踪选定的尾波特征，并对其进行了评估，并将其应用于记录数据。通过改变锂掺合料的剂量，监测的混凝土棱柱被设计成具有三种不同水平的ASR活性。建议的方法被认为是有希望的。该过程是自动化的，使用尾波场对样本进行监测能够清楚地区分具有不同ASR展开的混合物。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Materials Evaluation 工程技术-材料科学：表征与测试

CiteScore

0.90

自引率

16.70%

发文量

审稿时长

6-12 weeks

期刊介绍： Materials Evaluation publishes articles, news and features intended to increase the NDT practitioner’s knowledge of the science and technology involved in the field, bringing informative articles to the NDT public while highlighting the ongoing efforts of ASNT to fulfill its mission. M.E. is a peer-reviewed journal, relying on technicians and researchers to help grow and educate its members by providing relevant, cutting-edge and exclusive content containing technical details and discussions. The only periodical of its kind, M.E. is circulated to members and nonmember paid subscribers. The magazine is truly international in scope, with readers in over 90 nations. The journal’s history and archive reaches back to the earliest formative days of the Society.