[TowerTalk] Conductivity of concrete

[Drax Felton]

I've read that concrete is conductive even after completely setting.   Does anyone know what it's actual mho's or conductivity is?     I'm sure it ranges based on composition but was just wondering about an average bag of properly mixed Quickete as an example.  


Kb3x


On Jul 18, 2013, at 1:15 PM, john at kk9a.com wrote:

> Obviously K8UR is joking.  My towers have also taken a number of direct
> lightning strikes with no visible damage to the concrete base.
> 
> 
> To:    TOWERTALK at contesting.com
> Subject: Re: [TowerTalk] Tower Grounding...
> From:    Cqtestk4xs at aol.com
> Date:     Thu, 18 Jul 2013 12:31:45 -0400 (EDT)
> 
> I've had many 200 ft towers over the last 25 years and they have  taken
> direct hits.  None of them has ever had their bases "blown to  bits".
> 
> Note this is in central FL, the lightning capitol of North America  and all
> hits have taken place in wet weather.
> 
> Bill K4XS/KH7XS
> 
> In a message dated 7/18/2013 4:09:43 P.M. Coordinated Universal Time,
> dmitchell at alionscience.com writes:
> 
> Why  would anyone want to "ground" a tower thru cement?
> If the cement is "wet",  lightning will conduct thru it, blow it to bits if
> it's a large strike, and  your tower will float away to Jupiter.
> If the cement is "dry", lightning  will see it as just a little lossy
> insulator, blow it to bits if it's a large  strike, and your tower will float
> away to Mars.
> Your only hope is not to  use cement..., and hope it stays in Earth.
> 
> Mitch Mitchell -  K8UR
> 
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