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Applications of Centimetric Radio Waves in Nondestructive Testing / A. R. Boot, A. Watson

Conference Author
Application of Advanced and Nuclear Physics to Testing Materials (1964 : Philadelphia, Pa.)
Physical Description
1 online resource (22 pages) : illustrations, figures, tables
Additional Creators
Boot, A. R., Watson, A., American Society for Testing and Materials, and ASTM International
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Summary
The dipolar relaxation phenomena and attendant absorption displayed by water in the microwave region of the spectrum has been used as a basis for the nondestructive testing of the moisture content of building materials. Because of this relaxation effect, the dielectric properties of moist materials at these frequencies depend sensitively on the quantity of moisture present, and thus the macroscopic electromagnetic parameters, and in particular the transmission attenuation, associated with a building structure at a particular frequency are characteristic of the water content. A practical method of assessing the moisture phase of materials is thus available. Further, observation of the dielectric behavior of the water-material mixture can yield information about the distribution of moisture in porous media. The theory of these new methods of testing, based on electromagnetic theory and dielectric mixture studies, is presented in some detail, followed by a description of the apparatus and experimental procedure. Problems of calibration and accuracy are discussed and results compared with other work in the field.
Dates of Publication and/or Sequential Designation
Volume 1965, Issue 373 (January 1965)
Subject(s)
ISBN
0803166133
9780803166134
9780803169753 (e-ISBN)
Digital File Characteristics
text file PDF
Bibliography Note
Includes bibliographical references 14.
Other Forms
Also available in PDF edition.
Also available online via the World Wide Web. Tables of contents and abstracts freely available; full-text articles available by subscription.
Full text article also available for purchase.
Reproduction Note
Electronic reproduction. W. Conshohocken, Pa. : ASTM International, 1965. Mode of access: World Wide Web. System requirements: Web browser. Access may be restricted to users at subscribing institutions.
Technical Details
Mode of access: World Wide Web.
Source of Acquisition
ASTM International PDF Purchase price USD25.
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