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Dielectric Spectroscopy of Fresh Cement
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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