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Microwave Measurements of the Water Content of Bentonite

by Victor R. Latorre, Lawrence Livermore Natl Lab, Livermore, United States,
H. David Glenn, Lawrence Livermore Natl Lab, Livermore, United States,



Document Type: Proceeding Paper

Part of: High Level Radioactive Waste Management 1991

Abstract:

The theory of operation of microwave coaxial resonators is described. Sample preparation and the application of resonator techniques to the measurement of the permittivity (dielectric constant) of bentonite is discussed. The results indicate a fairly linear change in resonant frequency for saturation levels at 10, 30, 50, 70, and 90%. The results clearly demonstrate that this microwave technique is a viable method for measuring water content of soils. A discussion of additional applications of microwave methods for determining water content in materials is presented.

Subject Headings: Microwaves | Water content | Bentonite | Soil water | Waste disposal | Resonance | Radioactive wastes

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