I did a seach on Yahoo
for "dielectric constant concrete" and got this
research paper from the University of Vermont (my
alma matter, coincidently) in the #1 position. I
did not do a lot of scanning through it, but it
looks like a lot of useful info in there. You need
to make sure steel reinforcement bar matrices are
included in your attenuation calculation.
EFFECT OF ADMIXTURES, CHLORIDES, AND MOISTURE
DIELECTRIC PROPERTIES OF PORTLAND CEMENT CONCRETE
THE LOW MICROWAVE FREQUENCY RANGE
http://scholar.lib.vt.edu/theses/availa ... 0concrete'
- Kirt Blattenberger
RF Cafe Progenitor & Webmaster