It is available under the brand name "Ultrafill" from Harger, in 50 pound
sacks. I can get it if anyone is interested.
Chris
KF7P
On Jan 19, 2016, at 8:29 AM, jimlux wrote:
> I know the literature is full of using bentonite as a conductivity enhancer.
> I wonder if there are other substances that may be more readily available in
> smallish quantities that would work as well.
>
> Bentonite is mined by the thousands of tons, and has lots of industrial uses
> (drilling mud, cat litter, impervious clay liners for ponds, etc.). And when
> people were looking for something to dump into the hole with the ground rod,
> they probably had it around, so that's what got used.
>
> I assume it's cheaper than concrete (if for no other reason than you can
> deliver it in a dump truck, as opposed to a mixer truck, and it doesn't have
> a very short "shelf life" after mixing).
>
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