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Dielectric Spectroscopy of Fresh Cement
by
Morgan McVay
Advisor: Dr. Brian Huggins
The microwave permittivity of cement is related to water content of the
mix. Since the strength of cement increases with a decreasing water/cement
ratio it was hypothesized that the microwave permittivity of a cement mix
would also be related to its 28 day strength. Experimental verification
of this relationship and consideration of other variables were the goals
of this project. In particular, measurements were made of water/cement
ratio, temperature, super plasticizer content, agitation of the mix, initial
temperature of mixing water and 28 day strength. Through careful experimental
design and the statistical analysis of the data, a relationship between
microwave permittivity, temperature, and water/cement ratio has been found.
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