Abstract

The results of measurement and monitoring of reflection and transmission properties of cement-based specimens (blocks of mortar, concrete) obtained by using a simple and an inexpensive measurement system at microwave frequencies (X-band) are presented. Dependencies of the reflection and transmission coefficients on water-to-cement (w/c) ratio, preparing and curing conditions of the specimens are demonstrated. It is shown that the amplitudes of reflection and transmission coefficients, together with thickness of the specimens, determine the complex dielectric permittivity of the hardened cement-based specimens. The expected applications of the results for the determination of physical properties of cement-based materials are discussed. The causes and effects of measurement errors and uncertainties are also discussed.

Department(s)

Electrical and Computer Engineering

Keywords and Phrases

X-Band Measurement System; Cement-Based Specimens; Cements (Building Materials); Complex Dielectric Permittivity; Concrete; Condition Monitoring; Curing; Curing Conditions; Hardened Cement-Based Specimens; Measurement Errors; Measurement Uncertainties; Measurement Uncertainty; Microwave Measurement; Microwave Reflection; Microwave Reflectometry; Microwave Transmission Properties; Monitoring; Mortar Blocks; Permittivity Measurement; Physical Properties; Preparing Conditions; Reflection Coefficients; Specimen Thickness; Transmission Coefficients; Water-To-Cement Ratio

International Standard Serial Number (ISSN)

0018-9456

Document Type

Article - Journal

Document Version

Final Version

File Type

text

Language(s)

English

Rights

© 2002 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.

Publication Date

01 Jan 2002

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