Title

Microwave Detection of Carbonation in Mortar using Dielectric Property Characterization

Abstract

Microwave materials characterization techniques based upon dielectric property measurements are well-suited for detection and evaluation of physical and chemical changes in cement-based materials. In this investigation, microwave dielectric properties of several mortar samples were measured at S-band (2.6-3.95 GHz) and X-band (8.2-12.4 GHz) at two different times nearly one year apart. It was found that during this period, while the samples remained in ambient environment conditions, their masses remained essentially constant over time. However their dielectric properties underwent a relatively substantial change. To investigate the reason(s) behind this phenomenon, both pH indicator test and thermogravimetric analysis were conducted and the results confirmed carbonation in the samples. In this paper, the results of these investigations are presented. Additionally, a first-order dielectric mixing model capable of carbonation depth estimation is described.

Meeting Name

IEEE International Instrumentation and Measurement Technology Conference: Instrumentation and Measurement for Sustainable Development (2014: May 12-15, Montevideo, Uruguay)

Department(s)

Electrical and Computer Engineering

Keywords and Phrases

Microwave Measurement; Mortar; Permittivity; Planning; Sustainable Development; Thermogravimetric Analysis; Ambient Environment; Cement Based Material; Dielectric Mixing Model; Microwave Dielectric Constant; Microwave Dielectric Properties; Microwave Materials; Property Characterizations; Property Measurement; Carbonation; Microwave Dielectric Constants Measurements; Microwave Materials Characterization

International Standard Book Number (ISBN)

9781467363853

International Standard Serial Number (ISSN)

1091-5281

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2014 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.

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