[TowerTalk] Proper Concrete Slump

[scottw3tx at verizon.net]

Hi Anthony. Simply specify the required psi when ordering concrete and let them know to have the driver bring empty concrete test canisters (two for each truckload) with him. Do not pour without the test canisters! This gives the concrete company incentive to give you the proper mix. Don't rely on slump...it is too qualitative. Then in 30 days have an independent local lab test one canister from each load. 

Best regards, 
Scott W3TX

On Sep 1, 2010, at 8:51 AM, "Anthony J. Cioffi \(N2KI\)" <n2ki at amsat.org> wrote:

> Guys,
> 
> 
> 
> Tomorrow is the next step in my tower installation. Concrete is being poured tomorrow.  My question is what slump should I
> use?  It is 4000psi. 
> 
> 
> 
> Pictures of the installation are uploaded here.
> (http://picasaweb.google.com/109109461434829776230/N2KISTowerInstallation?authkey=Gv1sRgCKjzp8rAo7jNzwE
> <http://picasaweb.google.com/109109461434829776230/N2KISTowerInstallation?authkey=Gv1sRgCKjzp8rAo7jNzwE&feat=directlink>
> &feat=directlink )
> 
> 
> 
>   Thanks for your help.
> 
> 
> 
> 
> 
> Anthony - N2KI
> 
> 30MDG - 1187
> 
> www.n2ki.com
> 
> 
> 
> 
> 
> 
> 
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